acute leukemia - rozup.irrozup.ir/download/1553950/acute leukemia.pdfincidence the annual new case...
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Acute leukemia
By: Kamran Alimoghaddam
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Acute Myeloid Leukemia (AML)
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Morphologic aspects of acute lymphoblastic leukemia (ALL)
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Definition:
Malignant clonal disorder of immature hematopoietic cells.
Characterized by aberrant an uncontrolled hematopoietic cell proliferation and arrest of maturation
Presented by impaction of BM by immature cells and prevention from normal hematopoiesis and release of abnormal blasts into peripheral blood.
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Maturation of myeloid series
Stem cell progenitors myeloblast promyelocyte
myelocyte metamyelocyte neutrophil
release to peripheral blood
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Maturation of monocytes
Stem cell monoblast promonocyte monocyte
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Maturation of lymphocytes
Stem cell early pre B cells pre B cells B cells lymphoblast
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pathophysiology
Leukemia is a maturation arrest of immature precurssors
The retained capacity of some differentiation is the basis for the phenotypic classification.
Acute non-lymphocytic leukemia ( Acute myelogenous leukemia)
Acute lymphocytic leukemia
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proliferation of immature hematopoietic cells that have lost their capacity to differentiate normally
multistep process
level of differentiation at which malignancy becomes evident is variable
As the malignant clone expands, it does so at the expense of normal hematopoiesis
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mechanism of normal marrow suppression in leukemia is complex
in many patients with hypercellular marrow, the pancytopenia is probably the result, at least in part, of physical replacement of normal marrow precursors by leukemic cells
In some patients with acute leukemia, however, a pancytopenia with hypocellular marrow develops, thus suggesting that marrow failure is not simply due to physical replacement of the marrow space but may also be due to substances released by the malignant cells
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Molecular changes in acute leukemia
Genetic changes have a central role in pathogenesis of acute leukemia
Leukemia is a multistep process
Cytogentic changes are:
1- numerical (gain or loss of chromosomes)
2- structural ( translocations, inversions, isochromosoms, etc)
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Southwest Oncology Group and Medical
Research Council cytogenetic risk category
definitions
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Frequencies of cytogenetic risk categories and
specific clonal abnormalities, by cooperative group
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Complete remission and overall
survival, by cytogenetic risk status
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Common cytogenetic changes in AML
Trisomy 8 and loss of part or all of 5 and 7 chromosome
t(8,21): AML1/ETO
t(15,17):PML/RARA
inv(16):CBFb/MYH11
11q23 abn:MLL
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Common cytogenetic changes in ALL
Hyperdiploidy or hypodiloidy
t(9,22):bcr/abl 190 kd tyrosin kinase
t(4,11)
t(1,19)
T(12,21): TEL/AML1
t(8,14): over expression of c-myc oncogene
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Molecular events implicated in the pathogenesis of AML include activating mutations in genes encoding tyrosine kinases, such as fms-like tyrosinekinase 3 (FLT3), c-KIT, and N-RAS, and mutations genes encoding transcription factors involved in normal hematopoiesis, such as AML1, GATA1, and CCAAT/enhancer binding protein alpha (CEBPA).
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incidence
The annual new case incidence of all leukemias is 8 to 10 per 100,000
This rate has remained static over the past three decades
The leukemias account for about 3% of all cancers in the United States
ALL is the most common cancer and the second leading cause of death in children younger than 15 years
ALL has a maximal incidence between 2 and 10 years of age, with a second, more gradual rise in frequency later in life
The incidence of AML gradually increases with age, without an early peak. Approximately half of AML cases occur in patients younger than 50 years.
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Acute Myeloid LeukemiaMedian age at diagnosis: 62 to 64 years
Incidence <65 years of age: 1.8 cases per 100,000
>65 years of age: 16.3 cases per 100,000
Approximately 12,000 cases in 2004
1.2% of all cancer deaths
Most common cause of cancer death in young men and women
Public health problem in older adults
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Distribution of different leukemia by age
age
% of patients
ALL AML
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Age-Specific Incidence Rates for AML
0
5
10
15
20
25
30
35
00-04 05-09 10-14 15-19 20-24 25-29 30-34 35-39 40-44 45-49 50-54 55-59 60-64 65-69 70-74 75-79 80-84 85+
Ave
rag
e A
nn
ua
l R
ate
pe
r 1
00
,00
0
Male
Female
All persons
NCI SEER Program, 1995-1999.
Age (yrs)
1995-1998
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Etiology:
Genetic disorders:
1-21+ 6-ataxia telangectasia
2-klien-felter 7-CVID
3-Bloom syn 8-SCID
4-Fanconi’s anemia
5-+13
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Etiology: environmental factors
Irradiation
Chemical agents: benzene, oil products, smoking, insecticides
Drugs: chemotherapeutic agents
Immune suppression
Viral oncogenes: HIV,EBV, HTLV1,2
BM failures
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Clinical presentation
BM failure
Infiltration of organs and tissues
Leukostasis
Couagulopathy and DIC
Organomegaly
Metabolic changes
Bone pain
Constitutional symptoms
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Pulmonary leukostasis with diffuse involvement of small and large vessels.
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Lab findings
Aneima
Thrombocytopenia
DIC: abn pt, ptt, FDP, fibrinogene level
Leukocytes
mean: 15000/mm3
5% aleukemic
25-40% leukocyte less than 5000
20% leukocyte more than 100000
Couagulation abnormalities
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Diagnosis
BMA/B
Immuno-phenotyping
Cytogenetic and molecular studies
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Normal blood film
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Normal plattlets
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Normal blood smear
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AML blood smear
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AML-M5
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AML-M5
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AML-M7
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AML-M7
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AML-M7 immunostain
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AML
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Acute leukemia classification(FAB)
subtype MPO PAS NSE Mab
reaction
cytogenetic
M0AUL
- - - CD13,14
33,34
various
M1Acute leukemia with minimal differentiation
+/- - +/- CD13,14
33,34
various
M2Aml with differentiation
+++ + +/- CD13,14
33,34
Various
T(8,21)
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Acute leukemia classification
M3Apl
+++ + + CD13,33
HLA-DR-
T(15,17)
M4Acute myelomonocytic leukemia
++ ++ +++ CD13,33,
14,11c,15b
various
M4EEosinophilic variant
++ ++ +++ CD13,33,
14,11c,15b
Inv(16)
M5aMonoblastic leukemia
+/- ++ +++ CD11c,
15b
11q23
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Acute leukemia classification
M5bAcute monoblastic leukemia
- ++ +++ CD11c,15bvarious
M6erythroleukemia
- ++ -Antiglycophorin
CD71various
M7Megakaryocytic leukemia
- + +/- Cd41,42,61various
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New classification of AML(WHO)
Recurrent cytogenetic abnormality AML
APL with t(15,17)
AML-M4E inv(16)
AML-M2 t(8,21)
T(9,11) ,INV3, T(6,9),T(1,22)
AML with NPM1 or CEBPA mutation
Therapy related AML Post chemotherapy, sometimes 11q23
MDS related AML Post myelodyspalasia, bad prognosis
Other types Including other types of AML
Myeloid sarcoma, Dawn sydrom
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Survival of patients by intention to treat analysis
Survival Function
SURVIVAL
120010008006004002000
Cum
Sur
viva
l
1.0
.9
.8
.7
.6
.5
.4
.3
.2
.1
.0
Survival Function
Censored
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Survival of patients by intention to treat analysisfor APL and Arsenic Troxide
Survival Function
SURVIVAL
120010008006004002000
Cum
Sur
viva
l
1.0
.9
.8
.7
.6
.5
.4
.3
.2
.1
.0
Survival Function
Censored
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Acute lymphocytic leukemia classification
subtype MPO PAS NSE Mab reaction
cytogenetic
ALL-L1 - +++ - CD19,20,
22,10
2,3,5
t(4,11)
t(1,19)
t(4,11)
ALL-L2 - ++ -
ALL-L3 - - - SIg
Tdt-
t(8,14)
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DNA microarray technology
A microarray works by exploiting the ability of a given mRNA molecule to bind specifically to, or hybridize to, the DNA template from which it originated
By using an array containing many DNA samples, scientists can determine--in a single experiment--the expression levels of hundreds or thousands of genes within a cell by measuring the amount of mRNA bound to each site on the array
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Some microarray experiments can contain up to
30,000 target spots
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Types of Microarrays
There are three basic types of samples
that can be used to construct DNA
microarrays--two are genomic and the
other is "transcriptomic," that is, it
measures mRNA levels
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Applications of microarray:
I. Changes in Gene Expression
Levels(microarray expression
analysis) expression chips
II. Genomic Gains And Losses
III. Mutations in DNA
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Cluster analysis of leukemic marrow samples
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Sixteen distinct groups of patients with AML
were identified on the basis of strong
similarities in gene-expression profiles.
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On the basis of SAM-selected genes, the leukemias
were partitioned into two groups with the use of a
different clustering approach (k-means cluster
analysis). Standard Kaplan–Meier survival analysis
confirmed the prognostic significance of these two
clusters: one is associated with a good outcome,
and the other with a poor outcome.
Bullinger et al. first established, using unsupervisedclustering, that the 6283 genes whose expressionvaried the most among the leukemic samplescould be used to identify specific subgroups of AML.
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a gene-expression profile based
133 genes predicted the clinical outcome
across cytogenetic risk groups.
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conclusion
AML samples with a normal karyotype
separated into two subgroups based on
distinct
samples with t(8;21) and inv(16) each
separate into
different subgroups.
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Treatment
Supportive care
Metaboilic support
Chemotherapy
BMT/HSCT
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prognosis
Without treatment almost always are fatal
Remission rate with chemotherapy between 70-90%
Relapse rate is usually high
Long term survival less than 40% with chemotherapy alone
With BMT chance of cure increase to 50-60%
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Prognostic factors:
Age
Performance
History of chemotherpay or hematologic disorders
Extramedulary disease
CNS or testis involvement
Serum LDH
Response to chemotherapy
cytogenetic
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Acute lymphocytic leukemia
Hematology, oncology and BMT research center, Shariati hospital
Hematology, oncology and BMT research center, Imam hospital
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Morphologic aspects of acute lymphoblastic leukemia (ALL)
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Flow data from a typical case of precursor-B acute lymphoblastic leukemia (ALL).
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0
10
20
30
40
50
60
70
male
female
Total patient numbers:149
Shariati hospital :94
Imam hospital: 55
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Induction
VCR
DAN
CY
Pred
CNSProphylaxis:
HDMTX
IT
ARA-C
VP16
IT X 2
CY
VCR
ADR
Pred
IT
Maintenacne
VCR,Pred,MTX,6MP
30
mo
Selection for
HSCT
ALL treatment plan (HORCBMT)
CR rate:77.7%
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Characteristic of patients in Shariati hospital
Median age: 19.6+/-10.01
Median WBC count at presentation: 14800+/- 76779.29( 200-369000)
Median Hb level at presenation: 8.3+/-2.5
Median Plt level at presentation: 38000+/-65748
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Organ involvement
Splenomegaly: 70%
Lymphadenopathy:60%
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Immunophenotypic and morphologic charactristic of patients
Early pre-B:37.5%
Pre-B: 29.7%
T cell:32.8%
L1:12.1%
L2:87.9%
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Morphologic aspects of acute lymphoblastic leukemia (ALL)
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Flow data from a typical case of precursor-B acute lymphoblastic leukemia (ALL).
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Remission induction
Early death( TRM): 6%
Complete remission on day 28: 87.8% of alive patients
Median follow up:10.5 mo (1-42mo)
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Median RFS:23.61year RFS:64% and 2 year RFS:47%
Survival Function
for RF survival analysis
1400120010008006004002000
1.1
1.0
.9
.8
.7
.6
.5
.4
.3
.2
.1
.0
Survival Function
Censored
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Median Overal survival for patients in CR 27.9 mo1 year OS:69% and 2 year OS:51% 3 yearOS:16%
Survival Function
1400120010008006004002000
Cum
Surv
ival
1.0
.8
.6
.4
.2
0.0
Survival Function
Censored
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Allogeneic hematopietic cell transplantation for acute myeloid leukemia
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Conventional treatment of AML:
Kinetic of AML: 1012 leukemia cells at presentation and 3 log reduction of the cells after a successful remission induction, usually we can’t to eradicate all of the leukemic cells despite the best chemotherapy regimen. Remaining cells are resistant to chemotherapy agents.
Conventional chemotherapy includes: standard dose of Cytarabin Arabinoside and Daunorubicine
RR=65-80%
long term survival less than 30%
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Remission Induction
Cure
Clinically Detectable Disease
Induction Relapse Relapse
Time
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Post-remission Therapy
Clinically Detectable Disease
Induction Consolidation Consolidation
Time
Cure
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Acute Myeloid Leukemia: Remission Induction
Cytarabine 100mg/m2/day x 7 days continuous infusion + anthracycline bolus x 3 days
– Add ATRA if APL (may delete cytarabine)
Expect 60% to 80% complete remission rateif <60 years
One of the major cancer therapy success stories of the 20th century
But … not all AML has a good prognosis
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Consolidation : High dose Cytarabine (3gr/m2 x 6 times and at least 4
times) is effective in good risk AML and long term survival is about 60%)
High dose cytarabine isn’t effective in other AMLs
long term survival in AMLs other than good risk patients isn’t usual after first complete remission.
Allogeneic BMT recommended in these patients
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Prognostic Factors in AML Age
60 years unfavorable Cytogenetics
Favorable: t(8;21), inv16, t(15;17) Intermediate: normal, -Y, +6, +8; others not
considered favorable or unfavorable Poor: Translocations or inversion of chromosome 3,
monosomy 5 or 7, t(6;9), t(9;22), abn 11q23, or complex
Presenting white blood cell count Hyperleukocytosis >100,000/μL unfavorable
Treatment-induced AML or history of myelodysplastic syndrome
Other unfavorable indicators CD34 expression, MDR phenotype, FLT3-activating
mutations, and Bcl-2 expression
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Summary: AML Remission Induction Therapy
Combination therapy
Cytarabine plus an anthracycline (daunorubicin, idarubicin, or mitoxantrone)
“7+3” schedule
Remission induction rates
70% to 80% in patients 18 to 40 years of age
60% to 70% in patients 40 to 60 years of age
40% to 50% in patients >60 years of age
Standard consolidation includes cycles of HiDAC
30% to 45% long-term relapse-free survival <60 years
No clear benefit for age >60 years
Stone RM. CA Cancer J Clin. 2002;52:363.
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New Approaches in AML Induction Immunotherapeutic approaches
Gemtuzumab ozogamicin IL-2 and histamine dihydrochloride
Cell-signaling modulation FLT3 inhibitors (tyrosine kinase target) Farnesyltransferase inhibitors
Drug-resistance modulation PSC-833 Bcl-2 antisense (oblimersen) Zosquidar (LY335979)
Anti-angiogenic therapy Proteosome inhibition (bortezomib)
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Prognostic factors:
Cytogenetic: the most important risk factor ( t(15,17), t(8,21), inv(16) are good risk AML)
Age
leukocytosis
therapy related or post MDS, AML
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Allogeneic HSCT after CR of AML
Long term survival is around 46-62% after allogeneic HLA matched sibling HSCT.
GVL effect is the reason of lower relapse rate
T cells are effector cells in GVHD and GVL phenomenon
Best time for HSCT in AML patients( except for good risk AMLs) is at first remission
conditioning regimens including TBI/CY or BU/CY
minitransplant in high risk patients who can’t tolerate aggressive conditioning
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Allogeneic v.s. Autologous v.s. Standard chemotherapy for AML in first remission
More than16 studies performed to compare the survival after allogeneic HSCT to autologous BMT or chemotherapy
Most of these studies showed better survival for allogeneic transplantation
no study reported a significant survival advantage or lower relapse rate for chemotherapy or autologous HSCT.
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Shariati hospital experience in allogeneic HSCT for AML
40 allogeneic HSCT in AML and 31 are alive ( 77.1%) v.s. 17-20% survival of conventional chemotherapy
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Patients Younger than 46 Years with AML in First Complete Remission (CR1)EORTC/GIMEMAAML-10 trial
Of 1198 patients younger than 46 years of age,822 achieved CR
734 patients received a single intensive consolidation (IC) course
293 had a sibling donor and 441 did not
Allo-SCT and auto-SCT were performed in 68.9% and 55.8%
The DFS rates were 43.4% and 18.4%, respectively, in patients whose leukemia hadbad/very bad risk cytogenetics
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DFS From CR According to Donor Availability
Suciu S, et al, Blood. 2003;102:1232.
100
90
80
70
60
50
40
30
20
10
0
0 4 6 82
Events/Patients Number of patients at risk:
229 /441 171 91 28 No Donor
126/293 336 80 33 Donor
52.2% (±3.2%) 38.4% 17.41%
42.2% (±2.6%) 52.2% 5.3%
P=.044
Relapse Death in CR
Perc
en
t P
atien
ts A
live in C
R
Years
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Relapse Death in CR
71/94 21 32 6 No Donor
32/61 28 39 8 Donor
51/104 45 25 8 No Donor
32/61 25 11 3 Donor
DFS From CR According to Donor Availability in Four Cytogenetic Groups
100
80
60
40
20
00 4 6 82
23/73 45 25 9 No Donor
68/5 27 18 4 Donor
65.7% (±5.9% 28.3% 6.0%
62.1% (±7.2% 21.9% 26.9%
P=.54
100
80
60
40
20
0 4 62
48.5% (±5.3%) 46.6% 5.0%
45.2% (±6.7%) 35.1% 19.7%
Relapse Death in CR
P=.510
100
80
60
40
20
00 4 6 82
Ev/Pt Number of patients at risk:
43.4% (±6.5%) 38.2% 38.4%
18.4% (±4.3%) 78.9% 3.2%
Relapse Death in CR
P=.0078
100
80
60
40
20
00 4 6 82
57.8% (±5.2%) 26.5% 15.7%
41.2% (±4.3%) 53.8% 5.0%
Relapse Death in CR
P=.0078
84/170 60 29 5 No Donor
41/148 56 32 18 Donor
8Years
Pe
rce
nt P
atie
nts
Aliv
e in
CR
Years
Ev/Pt Number of patients at risk:
Pe
rcen
t P
atie
nts
Aliv
e in
CR
Ev/Pt Number of patients at risk:
Ev/Pt Number of patients at risk:
Good Risk
Unknown RiskBad/Very Bad Risk
Intermediate Risk
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ECOG AML Survival Data<60 years >60 years
Su
rviv
al
1.0
0.8
0.6
0.2
0.4
0.0
0 10 15 20 255
Years
Study Year. 1989-1997, n=553
Median Survival= 3.2 months
5-Year Survival =12%
Study Year. 1973-1979, n=293
Median Survival= 3.5 months
5-Year Survival =6%
Study Year. 1983-1986, n=142
Median Survival= 6.3, months
5-Year Survival =13%
Su
rviv
al
1.0
0.8
0.6
0.2
0.4
0.0
0 10 15 20 255
Years
Study Year. 1983-1986, n=499
Median Survival= 13.4 months
5-Year Survival =24%
Study Year. 1973-1979, n=454
Median Survival= 11.3 months
5-Year Survival =11%
Study Year. 1989-1997, n=1044
Median Survival= 20.6 months
5-Year Survival =37%
Appelbaum. Hematology. 2001.
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Current Common Clinical Questions
Should every patient with AML receive induction therapy?
How old is old?
What is the best anthracycline?
What is the best dose of cytarabine?
What is the best consolidation?
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Older Adults Are Not as
Responsive to or Tolerant of Treatment
Comorbid diseases
Slow metabolism of induction-regimen drugs Particularly cytarabine
High drug levels
Hesitancy to give full doses
Biologically poor prognosis
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Randomized Trials of Induction Therapy >60 Years
Only 2 studies have been reported
Lowenberg B, et al. J Clin Oncol.1989;7:1268.
Survival advantage for induction chemotherapy but…
21 weeks vs. 11 weeks
Median survival 16 days longer than the time spent in the hospital
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Induction Therapy Decision-Making and Expectations of AML >60 years
Sekeres MA, et al. Leukemia. 2004;18:809.
43 patients >60 years
Approx. 50% chose induction chemotherapy
1-year mortality 63%, no difference in treatment groups
Induction chemotherapy: 79% of first 6 weeks in hospital
Supportive care: 14% of first 6 weeks in hospital
Older patients overestimate potential benefit from induction therapy
74% patients rate chance of cure >50%
90% patients rate 1-year survival >50%
89% physicians rate chance of cure <10%
Most patients do not recall alternatives to therapy received;
all were presented options
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Treatment Options for Older Patient
Be realistic
Supportive care/Palliation Blood and platelet transfusions
Antibiotics
Growth factors
Standard-dose induction chemotherapy
Low-dose chemotherapy Hydrea
Low-dose cytarabine
Clinical trials!
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Is There a Best Antracycline?(Age <60)
Comparisons
Idarubicin 12 mg/m2 vs. daunorubicin Blood 1991, 1992; JCO 1992; EJC 1991
Amsacrine vs daunorubicin Leukemia 1999; JCO 1987
Mitoxantrone vs. daunorubicin Leukemia 1990; Ann Hematol 1994
Summary: Similar outcomes
Current trials: Daunorubicin 45 mg/m2 vs. daunorubicin 90
mg/m2
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Is There a Best Antracycline?(Age >60)
No standard Rowe JM, et al. Blood. 2004;103:479.
Cytarabine 100 mg/m2 intravenously continuous infusion for 7 days
Daunorubicin 45 mg/m2 or mitoxantrone 12 mg/m2 or idarubicin 12 mg/m2 bolus intravenously for 3 days
No difference in efficacy or toxicity (35%-50% CR)
SWOG. Blood. 2002;100:3869. Mitoxantrone and etoposide vs. daunorubicin and
cytarabine No benefit of ME over DA
MRC. Blood. 2001;98:1302. DAT best but not direct comparison at same
cytarabine doses
Summary: Similar outcomes
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Survival by Anthracycline Type
100
80
60
40
20
0
1 2 3 4 5 0
DA n=116MA n=114IA n=118
Rowe JM, et al. Blood 2004;103:479.
Years
Surv
ival (%
)
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Is There a Best Dose of Cytarabine in Induction?
No evidence for a dose escalation above
100 mg/m2
100–200 mg/m2 standard
Addition of high-dose cytarabine to the induction regimen has not yet been shown to increase efficacy, but does increase toxicity
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Consolidation Therapy for AML Age <60 years At least 3 cycles of HiDAC (3g/m2 bid D1,3,5)
Superior to 1 cycle of HiDAC Superior to low-dose cytarabine maintenance Superior to no post-remission therapy
Role of stem cell transplant
Age >60 years No randomized trial shows any post-remission
therapy better than no therapy But . . . all studies showing long term survival
include consolidation Single cycle of HiDAC Repeated cycles of induction therapy Low-dose cytarabine maintenance IL-2 and histamine maintenance
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Gemtuzumab Ozogamicin (GO)
Recombinant, humanized murine monoclonal anti-CD33 antibody CD33 expressed on 90% of blasts from patients with AML Absent from normal hematopoietic stem cells
Calicheamicin derivative is a cytotoxic antibiotic Linked by hydrolyzable linker Shown to be active in AML in first relapse >60 years
OH
CH3 CH2
OCH3O
IgG4 anti-CD33Linker
DNA minor groove
binding
Me
O
O
NH
NHN
O
S
H
HOO
OCH3
NH O
O
OCH3
N
O
OCH3HOCH3
OCH3
HNHO
OO
OH
CH3S
CH3
OCH3
I
O
O
O
S
Me Me
OCH3
Calicheamicin derivative
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GO + Chemotherapy in De Novo AML
Pilot study for MRC AML-15 trial 64 patients aged 17 to 59 years treated with induction
GO + chemotherapy
GO (3 or 6 mg/m2) with chemotherapy DAT: daunorubicin, ara-C, thioguanine
DA: daunorubicin, ara-C
FLAG-Ida: fludarabine, ara-C, G-CSF, idarubicin
86% achieved CR with course 1 of GO + chemotherapy
78% of patients treated with GO + DA or
FLAG-Ida are in continuous CR at median of 8 months Combination with thioguanine increased hepatotoxicity
Kell WJ, et al. Blood. 2003;102:4277.
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Age <60 years (n=53) 60 years (n=21)
Dosing Daunomycin 45 mg/m2 Cytarabine 100 mg/m2
Days 1,2,3 Days 1-7
Cytarabine 100 mg/m2 GO 6 mg/m2 Days 1 & 8
Days 1-7
GO 6 mg/m2 Day 4
Cyto-
genetics Favorable 8% 0%
Intermed 60% 72%
Poor 32% 28%
Unknown 6 3
Phase II Studies of GO + Chemotherapy for De Novo AML
DeAngelo. ASH 2003. Oral presentation.
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GO + Chemotherapy: Efficacy
<60 years 60 years Response Rates (n=53)(n=21)
OR 81% 48%CR 79% 43%CRp 2% 5%*
Median OS >15 months 13.4 months
Median RFS 12.8 months 11.1 months
DeAngelo. ASH 2003. Oral presentation.
*Platelet count 97,000/μL; patient lost to follow-up.
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GO + Chemotherapy: Toxicity
<60 years 60 years(n=53) (n=21)
Elevated bilirubin 17% 14%
Elevated AST 19% 24%
Elevated ALT 17% 14%
VOD
Induction induced 0% 0%
HSCT associated
>115 days after GO* 0%
<115 days after GO† 56%
*Includes 8 allogeneic, 2 mini-allogeneic, and 2 autologous HSCT†9 allogeneic HSCT
DeAngelo. ASH 2003. Oral presentation.
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GO for De Novo AML in Patients Age 65 Years or Older
Interim report on a Phase II trial of GO as induction, consolidation, and maintenance therapy in previously untreated patients with AML who were ≥65 years of age
n=12 (29 patients planned)
CR in 27% (3/11) evaluable patients
7.6 months median duration of response
Generally well tolerated
No patient experienced grade 3 or 4 hepatic toxicity
No documented VOD or SOS
5 patients developed transient LFT abnormalitiesNabhan C, et al. Leuk Res. 2005;29:53.
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Farnesyltransferase inhibitorsin AML
ras mutations
Activating mutations of ras in 10% to 30% of AML patients
May lead to enhanced proliferation and survival
Inhibition of farnesyltransferase inhibits activation of ras protein
Inhibitors of farnesyltransferase in clinical development
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Tipifarnib (R115777): Phase II Trial in De Novo AML
104 patients with previously untreated high-risk AML and MDS 94 patients with AML
4 patients with MDS
6 patients with CMML
High risk defined as: Age >65 years
Age >18 years with poor cytogenetics
Secondary AML
Dosage: 600 mg p.o. BID for 21 days every2 to 4 weeks
Lancet JE et al. Blood. 2003;102:176a. Abstract 613.
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Tipifarnib: Clinical Activity in De Novo AML
(n=92)
21% CR 33% OR (CR + PR)
36% OR in patients >75 years
Median OS 5.8 months
Median OR in responding patients has not been reached, with 60% alive at 15 months
Toxicity Grade 4 toxicity occurred in 13% of patients,
mainly infection during neutropeniaLancet JE et al. Blood. 2003;102:176a. Abstract 613.
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Trials of Drug Resistance Reversal in AML
Cyclosporine A is a potent inhibitor of p-glycoprotein (MDR1)
PSC-833 is a non-immunosuppressive cyclosporine analog
Randomized trials of PSC-833 in combination with chemotherapy in patients with relapsed/refractory disease did not show benefit
CALGB trial in older adults stopped early because of therapy-related deaths in PSC-833 group
A SWOG trial in relapsed/refractory AML with continuous infusion DnR/HiDAC +/– CyA showed no difference in CR rate but lower relapse rate resulting in survival advantage
CALGB trial of ADE +/– PSC-833 in patients aged 18-59 years recently closed Baer MR, et al. Blood. 2002;100:1224-1232.2. Kolitz JE, et al. Blood. 2001;98:461a.
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Current Comparative Clinical Trials Investigating Induction Chemotherapy
Age <60
ECOG: dauno (45mg/m2)/ara-C vs. dauno (90mg/m2)
SWOG: dauno/ara-C +/– GO
EORTC: ida/ara-C vs. ida/HiDAC
HOVON: ida/ara-C vs. ida/HiDAC +/– G-
CSF
MRC: dauno/HiDAC vs. FLAG-ida +/– GO
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Current Comparative Clinical Trials Investigating Induction Chemotherapy
Age >60
CALGB: dauno/ara-C +/– oblimersen (Bcl-2 antisense)
ECOG: dauno/ara-C +/– zosquidar (MDR modulator)
SWOG: dauno/ara-C +/– cyclosporine A
EORTC: ida/ara-C +/– GO
HOVON: dauno (45mg/m2)/ara-C vs. dauno (90mg/m2)
MRC: dauno/ara-C vs. Hydrea/low-dose ara-C +/–ATRA
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AML Induction Therapy Conclusions AML remains a challenging disease to
induce into complete remission, particularly for older patients
Many targeted approaches in combination with anthracycline and cytarabine hold promise for improved patient outcomes
Age (years) Remission (%)
18-40 70-80
40-60 60-80
>60 10-35
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TREATMENT OPTIONS IN AML:
A PRACTICAL
CASED-BASED APPROACH
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The Role of Transplantation in Acute
Myelogenous Leukemia (AML)
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Case Presentation
45-year-old Wall Street investment banker presents to the ER with fevers and epistaxis. He is found to have a WBC count of 18,000 with 80% blasts and a platelet count of 4,000. A bone marrow aspirate and biopsy confirm the dx of M0 AML. Cytogenetics reveal monosomy 7, and he goes into prompt remission following “7&3” induction chemotherapy. A younger brother with a “wild
lifestyle” is a perfect HLA match.
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“We show that patients assigned to allo-SCT have a significantly better outcome…”
EORTC-LG/GIMEMA AML-10
“The number of relapses were substantially lower in the autologous BMT group”
MRC 10
“We conclude that intensive consolidation chemotherapy should be considered the standard post-remission therapy in adults with AML in CR1”
GOELAM
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Mixed Results With Transplantation as Consolidation
EORTC/GIMEMA study showed benefit to both auto and allo transplant arms
MRC 10 trial showed benefit to auto transplant arm
American Cooperative Group study showed no benefit to either auto or allo arm
GOELAM study showed no benefit to auto transplant arm
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Autologous or Allogeneic Bone Marrow Transplantation (BMT) Compared With Intensive Chemotherapy in AML
EORTC GIMEMA study
Randomized 623 patients in complete remission
Autologous as well as allogeneic bone marrow transplantation results in better disease-free survival than intensive consolidation chemotherapy with high-dose cytarabine and daunorubicin
Zittoun RA, et al. N Engl J Med. 1995; 332:217.
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Zittoun R. A. et al. N Engl J Med. 1995;332:217.
Disease-free Survival After Autologous or Allogeneic BMTor a Second Course of Intensive Consolidation Therapy
Intensive therapy 126 74 37 24 17 7 1
Autologous BMT 128 76 49 38 26 10 4
Allogeneic BMT 168 87 63 48 29 15 0
55%±4%
48%±5%
30%±4%
Intensive therapy (n=126; 81 events)
Autologous BMT (n=128; 64 events)
Allogeneic BMT (n=168; 70 events)
100
80
70
60
50
40
30
20
10
90
0 4 5 6 71 2 3
Years
Dis
ea
se-f
ree S
urv
ival (%
)
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Zittoun R. A. et al. N Engl J Med. 1995;332:217.
Overall Survival After a First Complete Remission With Autologous or Allogeneic BMT or a Second
Course of Intensive Consolidation Therapy
100
Patients at Risk
Intensive Therapy 126 95 67 40 25 9 2
Autologous BMT 128 94 60 45 29 12 4
Allogeneic BMT 168 100 67 50 31 16 0
90
80
70
60
50
40
30
20
10
0 1 2 3 4 5 6 7
Ove
rall
Su
rviv
al (%
)
Year
Intensive Therapy (n = 126; 57; events)
Autologous BMT (n = 128; 50 events)
Allogeneic BMT (n = 168; 61 events)
59%±4%
56%±5%
46%±5%
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MRC AML-10 Trial 381 patients were randomized
Superior disease-free survival at 7 years
(53% vs. 40%; P=.04)
The addition of autologous BMT to 4 courses of intensive chemotherapy substantially reduces the risk of relapse in all risk groups, leading to improvement in long-term survival
Burnett et al. Lancet. 1998;351:687.
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Chemotherapy Compared With Autologous or Allogeneic BMT in the Management of AML in First Remission
American Cooperative Group study shows
no difference
740 patients eligible
Survival after complete remission was somewhat better after chemotherapy than after autologous marrow transplantation (P=.05) or after allogeneic marrow transplantation (P=.04)
Cassileth PA, et al. N Engl J Med. 1998;339:1649.
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Cassileth PA, et al. N Engl J Med. 1998;339:1649.
Probability of Disease-free Survival According to Post-remission Therapy
1.0
0.8
0.6
0.4
0.2
1.51.00.50.0
0.0
3.53.02.52.0 4.54.0 5.0
Time Since Remission (yr)
Pro
po
rtio
n S
urv
ivin
g
Wit
ho
ut
Dis
ea
se
Group No. of Event/No. at Risk
Autologous transplantation 48/116 18/66 4/45 2/34 0/22
Allogeneic transplantation 41/113 14/71 5/55 1/32 0/22
Cytarabine 48/117 21/69 5/47 1/29 0/18
Autologous bone marrow transplantationAllogeneic bone marrow transplantationHigh-dose cytarabine
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GOELAM study also showed no benefit to transplant as consolidation therapy
517 eligible patients studied
The type of post-remission therapy had no significant impact on the outcome
Harousseau JL, et al. Blood. 1997;90:2978.
Comparison of Autologous BMT and Intensive
Chemotherapy as Post-remission Therapy in
Adult AML
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Allogeneic BMT (n = 88)
First Course of ICC (n=134)Log-ranked test: P=.62
No Benefit With Either Auto-or Allo-Transplant
Harousseau JL, et al, Blood. 1997;90:2978.
1.0
0.5
0.00 48 60 10812 24 36 72 84 96
Time in months
1.0
0.5
0 48 6012 24 36 72 84 96
Autologous BMT (n = 86)
First Course of ICC (n=78)Log-ranked test: P=.41
Time in months
0.0
Dis
ea
se-f
ree S
urv
ival
Dis
ea
se-f
ree S
urv
ival
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How Do We Reconcile the Four Studies?
GOELAM may have had superior results because of greater dose intensity of consolidation chemotherapy (24 g vs. 6 g of ara-C)
GOELAM had an unusually high relapse rate in the allo arm
GOELAM introduced amsacrine and etoposide into consolidation treatment
Two of the studies had a course of consolidation before transplant; 2 did not –
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Reduced Intensity Transplants
IV busulfan with fludarabine – anti-leukemic efficacy at least equal to BuCy
? the “new standard”
de Lima M, Courial D, Shehjahan M et al. Blood. 2004;104: Abstract 97
First-line therapy in CR1 also with fludarabine and busulfan – low incidence of NRM
LFS at 18 mos in high-risk pts, 75%
“a valid option in AML”
Blaise D. Bouron JM, Faucher C, et al. Blood. 2004;104;Abstract 101
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NST vs. Myeloablative Transplant at Relapse
How do you decide: auto vs. allo vs.
non-myeloablative?
Results with NST vs. myeloablative may be comparable
Alyea EP, et al. Blood. 2004
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Causes of Treatment FailureNon-myeloablative
51%
22%
22%
5% 0%
Relapse
GVHD
Infection
Other
Pulmonary
Myeloablative
30%
12%
9%9%
40%Relapse
GVHD
Infection
Other
Pulmonary
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TREATMENT OPTIONS IN AML:
A PRACTICAL
CASED-BASED APPROACH
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Chemotherapy for Relapsed AML: Making the Best out of a Bad Situation
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Resistant Acute Myeloid Leukemia
Definition
Refractory leukemia
Disease unresponsive to initial induction chemotherapy
Relapsed leukemia
Disease that recurs following an initial
complete remission
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Resistant Acute Myeloid Leukemia
A case history
67-year-old female presented with a history of acute leukemia of F.A.B. M1 phenotype with normal diploid cytogenetics diagnosed 8 years prior to presentation
Initial treatment consisted of 2 cycles of induction chemotherapy and 1 cycle of high-dose cytarabine/mitoxantrone consolidation
Initial remission lasted 5 months
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Resistant Acute Myeloid Leukemia
Therapy for AML in first relapse
Investigational trial of timed-sequential therapy with rHu-G-CSF and 12 doses of high-dose cytarabine
Second remission duration 7 years
At second relapse, leukemia morphology unchanged, but 3/20 cells showed trisomy 8
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Patient Characteristics
Refractory leukemia
High incidence of adverse cytogenetics, antecedent hematologic disturbance, adverse immunophenotypic features, expression of multiple drug resistance
Relapsed leukemia
A heterogeneous group, some secondarily resistant, some biologically favorable. Variable pretreatment features.
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Salvage Chemotherapy Protocols
Most are high-dose cytarabine-based
Non-cytarabine regimens Monoclonal antibody
Combination regimens Anthracycline
Etoposide
Carboplatin
Fludarabine
Radiation
Hematopoietic growth factors
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Factors Predictive of Response to
Salvage Therapy
Response to induction chemotherapy
Duration of first complete remission
<1 year
1-2 years
>2 years
Disease characteristics
Co-morbid disease
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Hazards in Evaluating
Salvage Therapies
Patient selection
Small sample size
Influence of pretreatment characteristics
Influence of co-morbid disease
Variability of initial post-remission treatment
Study design
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Patient Selection
Four distinctive groups with progressively less favorable disease biology
CR > 2 yr, no previous salvage therapy
CR 1-2 yr, no previous salvage therapy
CR <1 yr or without initial CR, no previous salvage therapy
CR <1 yr or without initial CR, on subsequent salvage for unresponsive disease
Estey E, et al. Cancer Chemother Pharmocol. 1997;40:S9.
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Options for Treatment of
Resistant Leukemia
Standard-dose chemotherapy
High-dose (myeloablative) chemotherapy
Autologous bone marrow transplantation
Allogeneic bone marrow transplantation
Combined-sequential therapy
Chemo-modulation
Inhibitors of drug resistance
Immunomodulation
Gemtuzumab ozogamicin
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Studies of Standard-dose Chemotherapy
Cytarabine-based Regimens
Author Year Agents # Patient Characteristics Outcomes
Amadori 1991 Mitoxantrone
VP-16
Ara-C
32 Refractory (18)
Relapsed (8)
After BMT (6)
66% CR
Duration 16W
Carella 1993 Ida
Ara-C
VP-16
92 Refractory (36)
Relapsed (50)
Other (11)
43% CR
Duration 16W
Kusnierz-Glaz 1993 Ida
Ara-C
33 Refractory (3)
Relapsed (10)
MDS (12)
Others (8)
10% CR
Duration 14W
Reese 1993 Mitoxantrone
Ara-C
47 Relapsed (14)
Others (33)
45% CR
Takaku 1985 Ara-C 30 Relapsed Ref (28) 40% CR
Duration 16W
Gore 1989 Ara-C
VP-16
41 Refractory (16)
Relapsed (25)
63% CR
Duration ?
Hiddemann 1986 Ara-C 26 Refractory (5) 50% CR
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Results of Standard-dose
Chemotherapy “Salvage”
•Complete remission rate 25%-60%
•Median remission duration 90-250 days
•Prolonged myelosuppression and toxicity
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Other Chemotherapeutic Approaches
OutcomesPatient Characteristics
#AgentsYear
Author
36% CR
Duration 9 mos
Refractory (9)
Relapsed (50)
59
Fludarabine
Ara-C
1992
Estey
28% CR
Duration 7 mos
Refractory (3)
Relapsed (22)
25
Carboplatin1989
Meyers
3% CRRefractory (6)
Relapsed (25)
31
Homoharringtonine
1989
Kantarjian
47% CR
Duration 7 mos
Refractory (0)
Relapsed (17)
17
2 CDA1992
Santana
42% CR
Duration 4-7 mos
Refractory (21)
Relapsed (31)
Other (9)
61
Mitoxantrone
VP-16
1988
Ho
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Timed-sequential Therapies
Author Year
Agents # Patient Characteristics
Outcomes
Puntous 1993
GM-CSF
Ara-C
Amsacrine
10
Refractory (0)
Relapsed (10)
[Early (1)]
70% CR
Duration 6 mos
Yamada 1995
G-CSF
Ara-C
Aclarubicin
18
Relapsed (18)
Late (12)
83% CR
Duration 6 mos
Schiller 1995
G-CSF
Ara-C
15
Refractory (2)
Relapsed (13)
64% CR
Duration 6 mos
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High-dose Chemotherapy
Author Year
Agents
Tx Type
#PatientCharacteristics Outcomes
Brown 1990
Cy
VP 16
None 40/65
Refractory (20)
Relapsed (20)
42% CR
Duration 3-5 mos
Körbling 1989
TBI/Cy
Purged-auto
30/52
Relapsed (30) 34% DFS @ 2 yr
Yeager 1986
Bu/Cy Purged-auto
25 Relapsed (25) 40% survival @ 2 yr
Gorin 1986
TBI/Cy
Purged-auto
11 Refractory (4)
Relapsed (5)
Other (2)
27% survival @ 1 yr
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Autologous Bone Marrow
Transplantation
Author Purging AgentActuarial Disease-free
Survival
Yeager, et al
NEJM. 1986;315:1471
4HC 43%
Lenarsky, et al
BMT. 1990;6:425-9
4HC 61%
Meloni, et al
Blood. 1990;75:2282
None 52%
Gorin, et al
Blood. 1986;67:1367
Asta Z-7557 25%
Ball, et al
Blood. 1986;68:1311
MoAb + C’ 31%
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Results of Autologous Bone Marrow
Transplantation for Relapsed Leukemia
•Complete remission rate: 50% to 100%
•Median remission duration: 3 to 11 months
•Actuarial leukemia-free survival at 1 year:
10% to 43%
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High-dose Chemotherapy
Author Year
Agents Tx Type
#Patient Characteristics Outcomes
Schnitz 1988
TBI/VP 16
MRD 16 Refractory (3)
Relapsed (9)
54% DFS
Santos 1983
Bu/Cy MRD 33 Refractory (16)
Relapsed (17)
0 +
29% DFS
Forman 1991
TBI/Cy/Ara-C
TBI/VP 16
MRD 21 Refractory (21) 43% DFS
Clift 1992
TBI/Cy MRD 126
First Relapse (126)
23% DFS
Schiller 1994
TBI/Cy
Bu/Cy
MUD 55 Refractory (8)
Relapsed (47)
23% DFS
Sierra 199 TBI/Cy MUD 10 Refractory (14) 12%-27% DFS
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Allogeneic Bone Marrow
Transplantation
Matched related donors
• Refractory disease
– Leukemia-free survival: 18% 5%
– Actuarial relapse rate: 63% 7%
• Relapsed disease
– Leukemia-free survival: 27% 6%
– Actuarial relapse rate: 45% 10%
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Investigational Agents/
New Therapies
Modifiers of multiple-drug resistance
PSC-833
Tamoxifen
Immunomodulatory agents
Interleukin-2
Monoclonal antibodies
Donor leukocytes
Differentiation agents
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Methods for Analyzing
New Therapies
Patient characteristics
Refractory disease
Relapsed disease
<6 mos
6 to12 mos Duration of first remission
>12 mos
Previous salvage therapy
Molecular/cytogenetic disease features
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Methods for Analyzing
New Therapies (cont.)
Avoid the hazards of Phase I/II studies
Dose-escalation
Toxicity vs. response
Develop criteria of response
Remission rate
Duration of response
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New Approaches in AML New chemotherapeutic drugs
Modulation of drug resistance
Sensitization
Anti-angiogenesis
Modulation of cell signaling
Immunotherapeutic
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New Chemotherapeutic Drugs Clofarabine
Phase II clinical trial in 62 patients with AML, MDS, CML in blast crisis, and ALL
32% achieved complete remission
AML of short CR1 CR 2/11
AML with long CR1 CR 7/8
2nd or subsequent relapse CR 8/12
Arsenic trioxide
Kantarjian H, et al, Blood. 2003;102:2379.
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Modulation of Drug Resistance Randomized trials of PSC-833
CALGB trial in older adults
SWOG trial in relapsed/refractory AML
CALGB trial of ADE and PSC-833 in
younger patients
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Tyrosine Kinase Inhibitors in AML
C-kit and FLT-3 are overexpressed in myelobasts
C-kit mutations in AML are rare
Mutations in FLT-3 occur in 20% to 30%
of cases
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FLT-3 inhibitors in AML Novartis PKC412
Cor/Millenium drug
Cephalon drug
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Immunotherapy in AML Immune mediated graft-vs.-leukemia
effect of allogeneic transplantation
Immunomodulatory agents
Tumor antigens
CD33
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Gemtuzumab Ozogamicin (GO) Recombinant humanized anti-CD33
monoclonal antibody
Conjugated with calicheamicin
Internalization of toxin liberated in acidic microenvironment
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GO Trials in AML Phase II trial
N=142, first relapse, age >60, no antecedent MDS, or auto-transplant
CR in 30%
Grade III/IV liver toxicity in 25%
Few infusion-related events
13% deaths, usually disease progression
Sievers EL, et al, J Clin Oncol. 2001;19:3244.
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Farnesyl Transferase Inhibitors Tipifarnib
Phase I trial showed responses in 8 of 25 AML patients
2 patients achieved CR
Phase II trial in 50 evaluable patients showed response to < 5% marrow blasts in 17
Harousseau JL, et al. Proc. Am Soc Clin Oncol. 2002; 21:265.
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Conclusions
Studies of “salvage” treatment are heavily influenced by patient disease characteristics
Alternative, standard chemotherapeutics do not seem to have a significant advantage over single-agent cytarabine
Allogeneic progenitor cell transplantation may be the only means of producing sustained leukemia-free survival
Randomized trials of “salvage” treatment, including allogeneic progenitor cell transplantation, have not been performed
Investigational therapies may best be subjected to analysis of a homogeneous well-characterized
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TREATMENT OPTIONS IN AML:
A PRACTICAL
CASED-BASED APPROACH
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TREATMENT OPTIONS IN AML:
A PRACTICAL
CASED-BASED APPROACH
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Acute Myeloid LeukemiaMedian age at diagnosis: 62 to 64 years
Incidence <65 years of age: 1.8 cases per 100,000
>65 years of age: 16.3 cases per 100,000
Approximately 12,000 cases in 2004
1.2% of all cancer deaths
Most common cause of cancer death in young men and women
Public health problem in older adults
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Age-Specific Incidence Rates for AML
0
5
10
15
20
25
30
35
00-04 05-09 10-14 15-19 20-24 25-29 30-34 35-39 40-44 45-49 50-54 55-59 60-64 65-69 70-74 75-79 80-84 85+
Ave
rag
e A
nn
ua
l R
ate
pe
r 1
00
,00
0
Male
Female
All persons
NCI SEER Program, 1995-1999.
Age (yrs)
1995-1998
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Remission Induction
Cure
Clinically Detectable Disease
Induction Relapse Relapse
Time
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Post-remission Therapy
Clinically Detectable Disease
Induction Consolidation Consolidation
Time
Cure
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Acute Myeloid Leukemia: Remission Induction
Cytarabine 100mg/m2/day x 7 days continuous infusion + anthracycline bolus x 3 days
– Add ATRA if APL (may delete cytarabine)
Expect 60% to 80% complete remission rateif <60 years
One of the major cancer therapy success stories of the 20th century
But … not all AML has a good prognosis
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Prognostic Factors in AML Age
60 years unfavorable Cytogenetics
Favorable: t(8;21), inv16, t(15;17) Intermediate: normal, -Y, +6, +8; others not
considered favorable or unfavorable Poor: Translocations or inversion of chromosome
3, monosomy 5 or 7, t(6;9), t(9;22), abn 11q23, or complex
Presenting white blood cell count Hyperleukocytosis >100,000/μL unfavorable
Treatment-induced AML or history of myelodysplastic syndrome
Other unfavorable indicators CD34 expression, MDR phenotype, FLT3-
activating mutations, and Bcl-2 expression
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SWOG/ECOG Adult AML; Age <56: Cytogenetics and Survival
Slovak et al. Blood. 2000.
100
80
60
40
20
0
0 2 4 6 8
Years After Entering Study
Heterogeneity of 3 groups: P<.0001
At Risk Deaths Estimated (CI)
at 5 Years
Favorable 121 53 55% (45%-64%)
Intermediate 278 168 38% (32%-44%)
Unfavorable 184 162 11% (7%-16%)
Surv
ival (%
)
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Comparison of Prognostic Factors: Older and Younger Adults With AML
Characteristic <60 years 60 years
#/100,000 in US 1.8 17.6
Cytogenetics
Favorable 6%-12% 1%-4%
Unfavorable 3%-7% 6%-18%
MDR1 expression35% 71%
Secondary AML 8% 20%-50%
Sekeres. Hematology. 2004.
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ECOG AML Survival Data<60 years >60 years
Su
rviv
al
1.0
0.8
0.6
0.2
0.4
0.0
0 10 15 20 255
Years
Study Year. 1989-1997, n=553
Median Survival= 3.2 months
5-Year Survival =12%
Study Year. 1973-1979, n=293
Median Survival= 3.5 months
5-Year Survival =6%
Study Year. 1983-1986, n=142
Median Survival= 6.3, months
5-Year Survival =13%
Su
rviv
al
1.0
0.8
0.6
0.2
0.4
0.0
0 10 15 20 255
Years
Study Year. 1983-1986, n=499
Median Survival= 13.4 months
5-Year Survival =24%
Study Year. 1973-1979, n=454
Median Survival= 11.3 months
5-Year Survival =11%
Study Year. 1989-1997, n=1044
Median Survival= 20.6 months
5-Year Survival =37%
Appelbaum. Hematology. 2001.
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Current Common Clinical Questions
Should every patient with AML receive induction therapy?
How old is old?
What is the best anthracycline?
What is the best dose of cytarabine?
What is the best consolidation?
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Older Adults Are Not as Responsive to or Tolerant of Treatment
Comorbid diseases
Slow metabolism of induction-regimen drugs
Particularly cytarabine
High drug levels
Hesitancy to give full doses
Biologically poor prognosis
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Randomized Trials of Induction Therapy >60 Years
Only 2 studies have been reported
Lowenberg B, et al. J Clin Oncol.1989;7:1268.
Survival advantage for induction chemotherapy but…
21 weeks vs. 11 weeks
Median survival 16 days longer than the time spent in the hospital
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Induction Therapy Decision-Making and Expectations of AML >60 years
Sekeres MA, et al. Leukemia. 2004;18:809.
43 patients >60 years
Approx. 50% chose induction chemotherapy
1-year mortality 63%, no difference in treatment groups
Induction chemotherapy: 79% of first 6 weeks in hospital
Supportive care: 14% of first 6 weeks in hospital
Older patients overestimate potential benefit from induction therapy
74% patients rate chance of cure >50%
90% patients rate 1-year survival >50%
89% physicians rate chance of cure <10%
Most patients do not recall alternatives to therapy received;
all were presented options
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Treatment Options for Older Patient
Be realistic
Supportive care/Palliation Blood and platelet transfusions
Antibiotics
Growth factors
Standard-dose induction chemotherapy
Low-dose chemotherapy Hydrea
Low-dose cytarabine
Clinical trials!
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Is There a Best Antracycline?(Age <60)
Comparisons
Idarubicin 12 mg/m2 vs. daunorubicin Blood 1991, 1992; JCO 1992; EJC 1991
Amsacrine vs daunorubicin Leukemia 1999; JCO 1987
Mitoxantrone vs. daunorubicin Leukemia 1990; Ann Hematol 1994
Summary: Similar outcomes
Current trials: Daunorubicin 45 mg/m2 vs. daunorubicin 90
mg/m2
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Is There a Best Antracycline?(Age >60)
No standard Rowe JM, et al. Blood. 2004;103:479.
Cytarabine 100 mg/m2 intravenously continuous infusion for 7 days
Daunorubicin 45 mg/m2 or mitoxantrone 12 mg/m2 or idarubicin 12 mg/m2 bolus intravenously for 3 days
No difference in efficacy or toxicity (35%-50% CR)
SWOG. Blood. 2002;100:3869. Mitoxantrone and etoposide vs. daunorubicin and
cytarabine No benefit of ME over DA
MRC. Blood. 2001;98:1302. DAT best but not direct comparison at same
cytarabine doses
Summary: Similar outcomes
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Survival by Anthracycline Type
100
80
60
40
20
0
1 2 3 4 5 0
DA n=116MA n=114IA n=118
Rowe JM, et al. Blood 2004;103:479.
Years
Surv
ival (%
)
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Is There a Best Dose of Cytarabine in Induction?
No evidence for a dose escalation above
100 mg/m2
100–200 mg/m2 standard
Addition of high-dose cytarabine to the induction regimen has not yet been shown to increase efficacy, but does increase toxicity
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Consolidation Therapy for AML Age <60 years At least 3 cycles of HiDAC (3g/m2 bid D1,3,5)
Superior to 1 cycle of HiDAC Superior to low-dose cytarabine maintenance Superior to no post-remission therapy
Role of stem cell transplant
Age >60 years No randomized trial shows any post-remission
therapy better than no therapy But . . . all studies showing long term survival
include consolidation Single cycle of HiDAC Repeated cycles of induction therapy Low-dose cytarabine maintenance IL-2 and histamine maintenance
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Summary: AML Remission Induction Therapy
Combination therapy
Cytarabine plus an anthracycline (daunorubicin, idarubicin, or mitoxantrone)
“7+3” schedule
Remission induction rates
70% to 80% in patients 18 to 40 years of age
60% to 70% in patients 40 to 60 years of age
40% to 50% in patients >60 years of age
Standard consolidation includes cycles of HiDAC
30% to 45% long-term relapse-free survival <60 years
No clear benefit for age >60 yearsStone RM. CA Cancer J Clin. 2002;52:363.
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New Approaches in AML Induction Immunotherapeutic approaches
Gemtuzumab ozogamicin IL-2 and histamine dihydrochloride
Cell-signaling modulation FLT3 inhibitors (tyrosine kinase target) Farnesyltransferase inhibitors
Drug-resistance modulation PSC-833 Bcl-2 antisense (oblimersen) Zosquidar (LY335979)
Anti-angiogenic therapy Proteosome inhibition (bortezomib)
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Gemtuzumab Ozogamicin (GO)
Recombinant, humanized murine monoclonal anti-CD33 antibody CD33 expressed on 90% of blasts from patients with AML Absent from normal hematopoietic stem cells
Calicheamicin derivative is a cytotoxic antibiotic Linked by hydrolyzable linker Shown to be active in AML in first relapse >60 years
OH
CH3 CH2
OCH3O
IgG4 anti-CD33Linker
DNA minor groove
binding
Me
O
O
NH
NHN
O
S
H
HOO
OCH3
NH O
O
OCH3
N
O
OCH3HOCH3
OCH3
HNHO
OO
OH
CH3S
CH3
OCH3
I
O
O
O
S
Me Me
OCH3
Calicheamicin derivative
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GO + Chemotherapy in De Novo AML
Pilot study for MRC AML-15 trial
64 patients aged 17 to 59 years treated with induction
GO + chemotherapy
GO (3 or 6 mg/m2) with chemotherapy
DAT: daunorubicin, ara-C, thioguanine
DA: daunorubicin, ara-C
FLAG-Ida: fludarabine, ara-C, G-CSF, idarubicin
86% achieved CR with course 1 of GO + chemotherapy
78% of patients treated with GO + DA or
FLAG-Ida are in continuous CR at median of 8 months
Combination with thioguanine increased hepatotoxicityKell WJ, et al. Blood. 2003;102:4277.
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Age <60 years (n=53) 60 years (n=21)
Dosing Daunomycin 45 mg/m2 Cytarabine 100 mg/m2
Days 1,2,3 Days 1-7
Cytarabine 100 mg/m2 GO 6 mg/m2 Days 1 & 8
Days 1-7
GO 6 mg/m2 Day 4
Cyto-
genetics Favorable 8% 0%
Intermed 60% 72%
Poor 32% 28%
Unknown 6 3
Phase II Studies of GO + Chemotherapy for De Novo AML
DeAngelo. ASH 2003. Oral presentation.
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GO + Chemotherapy: Efficacy
<60 years 60 years Response Rates (n=53)(n=21)
OR 81% 48%CR 79% 43%CRp 2% 5%*
Median OS >15 months 13.4 months
Median RFS 12.8 months 11.1 months
DeAngelo. ASH 2003. Oral presentation.
*Platelet count 97,000/μL; patient lost to follow-up.
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GO + Chemotherapy: Toxicity
<60 years 60 years(n=53)
(n=21)
Elevated bilirubin 17%14%
Elevated AST 19%24%
Elevated ALT 17%14%
VOD
Induction induced 0%0%
*Includes 8 allogeneic, 2 mini-allogeneic, and 2 autologous HSCT†9 allogeneic HSCT
DeAngelo. ASH 2003. Oral presentation.
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GO for De Novo AML in Patients Age 65 Years or Older
Interim report on a Phase II trial of GO as induction, consolidation, and maintenance therapy in previously untreated patients with AML who were ≥65 years of age
n=12 (29 patients planned)
CR in 27% (3/11) evaluable patients
7.6 months median duration of response
Generally well tolerated
No patient experienced grade 3 or 4 hepatic toxicity
No documented VOD or SOS
5 patients developed transient LFT abnormalitiesNabhan C, et al. Leuk Res. 2005;29:53.
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Farnesyltransferase inhibitorsin AML
ras mutations
Activating mutations of ras in 10% to 30% of AML patients
May lead to enhanced proliferation and survival
Inhibition of farnesyltransferase inhibits activation of ras protein
Inhibitors of farnesyltransferase in clinical development
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Tipifarnib (R115777): Phase II Trial in De Novo AML
104 patients with previously untreated high-risk AML and MDS 94 patients with AML
4 patients with MDS
6 patients with CMML
High risk defined as: Age >65 years
Age >18 years with poor cytogenetics
Secondary AML
Dosage: 600 mg p.o. BID for 21 days every2 to 4 weeks
Lancet JE et al. Blood. 2003;102:176a. Abstract 613.
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Tipifarnib: Clinical Activity in De Novo AML
(n=92)
21% CR 33% OR (CR + PR)
36% OR in patients >75 years
Median OS 5.8 months
Median OR in responding patients has not been reached, with 60% alive at 15 months
Toxicity Grade 4 toxicity occurred in 13% of patients,
mainly infection during neutropeniaLancet JE et al. Blood. 2003;102:176a. Abstract 613.
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Trials of Drug Resistance Reversal in AML
Cyclosporine A is a potent inhibitor of p-glycoprotein (MDR1)
PSC-833 is a non-immunosuppressive cyclosporine analog
Randomized trials of PSC-833 in combination with chemotherapy in patients with relapsed/refractory disease did not show benefit
CALGB trial in older adults stopped early because of therapy-related deaths in PSC-833 group
A SWOG trial in relapsed/refractory AML with continuous infusion DnR/HiDAC +/– CyA showed no difference in CR rate but lower relapse rate resulting in survival advantage
CALGB trial of ADE +/– PSC-833 in patients aged
Baer MR, et al. Blood. 2002;100:1224-1232.2. Kolitz JE, et al. Blood. 2001;98:461a.
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Current Comparative Clinical Trials Investigating Induction Chemotherapy
Age <60
ECOG: dauno (45mg/m2)/ara-C vs. dauno (90mg/m2)
SWOG: dauno/ara-C +/– GO
EORTC: ida/ara-C vs. ida/HiDAC
HOVON: ida/ara-C vs. ida/HiDAC +/– G-
CSF
MRC: dauno/HiDAC vs. FLAG-ida +/– GO
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Current Comparative Clinical Trials Investigating Induction Chemotherapy
Age >60
CALGB: dauno/ara-C +/– oblimersen (Bcl-2 antisense)
ECOG: dauno/ara-C +/– zosquidar (MDR modulator)
SWOG: dauno/ara-C +/– cyclosporine A
EORTC: ida/ara-C +/– GO
HOVON: dauno (45mg/m2)/ara-C vs. dauno (90mg/m2)
MRC: dauno/ara-C vs. Hydrea/low-dose ara-C +/– ATRA
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AML Induction Therapy Conclusions AML remains a challenging disease to
induce into complete remission, particularly for older patients
Many targeted approaches in combination with anthracycline and cytarabine hold promise for improved patient outcomes
Age (years) Remission (%)
18-40 70-80
40-60 60-80
>60 10-35
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TREATMENT OPTIONS IN AML:
A PRACTICAL
CASED-BASED APPROACH
Corporate Friday Symposium
Manchester Grand Hyatt
Randle Ballroom C-E
Friday, December 3, 2004
7:00am-11:00am
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The Role of Transplantation in Acute
Myelogenous Leukemia (AML)
Michael W. Schuster, M.D.
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Case Presentation
45-year-old Wall Street investment banker presents to the ER with fevers and epistaxis. He is found to have a WBC count of 18,000 with 80% blasts and a platelet count of 4,000. A bone marrow aspirate and biopsy confirm the dx of M0 AML. Cytogenetics reveal monosomy 7, and he goes into prompt remission following “7&3” induction chemotherapy. A younger brother with a “wild lifestyle” is a perfect HLA match.
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“We show that patients assigned to allo-SCT have a significantly better outcome…”
EORTC-LG/GIMEMA AML-10
“The number of relapses were substantially lower in the autologous BMT group”
MRC 10
“We conclude that intensive consolidation chemotherapy should be considered the standard post-remission therapy in adults with AML in CR1”
GOELAM
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Mixed Results With Transplantation as Consolidation
EORTC/GIMEMA study showed benefit to both auto and allo transplant arms
MRC 10 trial showed benefit to auto transplant arm
American Cooperative Group study showed no benefit to either auto or allo arm
GOELAM study showed no benefit to auto transplant arm
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Autologous or Allogeneic Bone Marrow Transplantation (BMT) Compared With Intensive Chemotherapy in AML
EORTC GIMEMA study
Randomized 623 patients in complete remission
Autologous as well as allogeneic bone marrow transplantation results in better disease-free survival than intensive consolidation chemotherapy with high-dose cytarabine and daunorubicin
Zittoun RA, et al. N Engl J Med. 1995; 332:217.
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Zittoun R. A. et al. N Engl J Med. 1995;332:217.
Disease-free Survival After Autologous or Allogeneic BMTor a Second Course of Intensive Consolidation Therapy
Intensive therapy 126 74 37 24 17 7 1
Autologous BMT 128 76 49 38 26 10 4
Allogeneic BMT 168 87 63 48 29 15 0
55%±4%
48%±5%
30%±4%
Intensive therapy (n=126; 81 events)
Autologous BMT (n=128; 64 events)
Allogeneic BMT (n=168; 70 events)
100
80
70
60
50
40
30
20
10
90
0 4 5 6 71 2 3
Years
Dis
ea
se-f
ree S
urv
ival (%
)
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Zittoun R. A. et al. N Engl J Med. 1995;332:217.
Overall Survival After a First Complete Remission With Autologous or Allogeneic BMT or a Second
Course of Intensive Consolidation Therapy
100
Patients at Risk
Intensive Therapy 126 95 67 40 25 9 2
Autologous BMT 128 94 60 45 29 12 4
Allogeneic BMT 168 100 67 50 31 16 0
90
80
70
60
50
40
30
20
10
0 1 2 3 4 5 6 7
Ove
rall
Su
rviv
al (%
)
Year
Intensive Therapy (n = 126; 57; events)
Autologous BMT (n = 128; 50 events)
Allogeneic BMT (n = 168; 61 events)
59%±4%
56%±5%
46%±5%
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AML in First Complete Remission (CR1)
EORTC/GIMEMAAML-10 trial
Of 1198 patients younger than 46 years of age, 822 achieved CR
734 patients received a single intensive consolidation (IC) course
293 had a sibling donor and 441 did not
Allo-SCT and auto-SCT were performed in 68.9% and 55.8%
The DFS rates were 43.4% and 18.4%, respectively, in patients whose leukemia had bad/very bad risk cytogenetics
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DFS From CR According to Donor Availability
Suciu S, et al, Blood. 2003;102:1232.
100
90
80
70
60
50
40
30
20
10
0
0 4 6 82
Events/Patients Number of patients at risk:
229 /441 171 91 28 No Donor
126/293 336 80 33 Donor
52.2% (±3.2%) 38.4% 17.41%
42.2% (±2.6%) 52.2% 5.3%
P=.044
Relapse Death in CR
Perc
en
t P
atien
ts A
live in C
R
Years
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Relapse Death in CR
71/94 21 32 6 No Donor
32/61 28 39 8 Donor
51/104 45 25 8 No Donor
32/61 25 11 3 Donor
DFS From CR According to Donor Availability in Four Cytogenetic Groups
100
80
60
40
20
00 4 6 82
23/73 45 25 9 No Donor
68/5 27 18 4 Donor
65.7% (±5.9% 28.3% 6.0%
62.1% (±7.2% 21.9% 26.9%
P=.54
100
80
60
40
20
0 4 62
48.5% (±5.3%) 46.6% 5.0%
45.2% (±6.7%) 35.1% 19.7%
Relapse Death in CR
P=.510
100
80
60
40
20
00 4 6 82
Ev/Pt Number of patients at risk:
43.4% (±6.5%) 38.2% 38.4%
18.4% (±4.3%) 78.9% 3.2%
Relapse Death in CR
P=.0078
100
80
60
40
20
00 4 6 82
57.8% (±5.2%) 26.5% 15.7%
41.2% (±4.3%) 53.8% 5.0%
Relapse Death in CR
P=.0078
84/170 60 29 5 No Donor
41/148 56 32 18 Donor
8Years
Pe
rcen
t P
atie
nts
Aliv
e in
CR
Years
Ev/Pt Number of patients at risk:
Pe
rcen
t P
atie
nts
Aliv
e in
CR
Ev/Pt Number of patients at risk:
Ev/Pt Number of patients at risk:
Good Risk
Unknown RiskBad/Very Bad Risk
Intermediate Risk
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MRC AML-10 Trial 381 patients were randomized
Superior disease-free survival at 7 years
(53% vs. 40%; P=.04)
The addition of autologous BMT to 4 courses of intensive chemotherapy substantially reduces the risk of relapse in all risk groups, leading to improvement in long-term survival
Burnett et al. Lancet. 1998;351:687.
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Chemotherapy Compared With Autologous or Allogeneic BMT in the Management of AML in First Remission
American Cooperative Group study shows
no difference
740 patients eligible
Survival after complete remission was somewhat better after chemotherapy than after autologous marrow transplantation (P=.05) or after allogeneic marrow transplantation (P=.04)
Cassileth PA, et al. N Engl J Med. 1998;339:1649.
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Cassileth PA, et al. N Engl J Med. 1998;339:1649.
Probability of Disease-free Survival According to Post-remission Therapy
1.0
0.8
0.6
0.4
0.2
1.51.00.50.0
0.0
3.53.02.52.0 4.54.0 5.0
Time Since Remission (yr)
Pro
po
rtio
n S
urv
ivin
g
Wit
ho
ut
Dis
ea
se
Group No. of Event/No. at Risk
Autologous transplantation 48/116 18/66 4/45 2/34 0/22
Allogeneic transplantation 41/113 14/71 5/55 1/32 0/22
Cytarabine 48/117 21/69 5/47 1/29 0/18
Autologous bone marrow transplantationAllogeneic bone marrow transplantationHigh-dose cytarabine
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GOELAM study also showed no benefit to transplant as consolidation therapy
517 eligible patients studied
The type of post-remission therapy had no significant impact on the outcome
Harousseau JL, et al. Blood. 1997;90:2978.
Comparison of Autologous BMT and Intensive
Chemotherapy as Post-remission Therapy in
Adult AML
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Allogeneic BMT (n = 88)
First Course of ICC (n=134)Log-ranked test: P=.62
No Benefit With Either Auto-or Allo-Transplant
Harousseau JL, et al, Blood. 1997;90:2978.
1.0
0.5
0.00 48 60 10812 24 36 72 84 96
Time in months
1.0
0.5
0 48 6012 24 36 72 84 96
Autologous BMT (n = 86)
First Course of ICC (n=78)Log-ranked test: P=.41
Time in months
0.0
Dis
ease
-fre
e S
urv
ival
Dis
ease
-fre
e S
urv
ival
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How Do We Reconcile the Four Studies?
GOELAM may have had superior results because of greater dose intensity of consolidation chemotherapy (24 g vs. 6 g of ara-C)
GOELAM had an unusually high relapse rate in the allo arm
GOELAM introduced amsacrine and etoposide into consolidation treatment
Two of the studies had a course of consolidation before transplant; 2 did not –
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Reduced Intensity Transplants
IV busulfan with fludarabine – anti-leukemic efficacy at least equal to BuCy
? the “new standard”
de Lima M, Courial D, Shehjahan M et al. Blood. 2004;104: Abstract 97
First-line therapy in CR1 also with fludarabine and busulfan – low incidence of NRM
LFS at 18 mos in high-risk pts, 75%
“a valid option in AML”
Blaise D. Bouron JM, Faucher C, et al. Blood. 2004;104;Abstract 101
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NST vs. Myeloablative Transplant at Relapse
How do you decide: auto vs. allo vs.
non-myeloablative?
Results with NST vs. myeloablative may be comparable
Alyea EP, et al. Blood. 2004
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Causes of Treatment FailureNon-myeloablative
51%
22%
22%
5% 0%
Relapse
GVHD
Infection
Other
Pulmonary
Myeloablative
30%
12%
9%9%
40%Relapse
GVHD
Infection
Other
Pulmonary
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TREATMENT OPTIONS IN AML:
A PRACTICAL
CASED-BASED APPROACH
Corporate Friday Symposium
Manchester Grand Hyatt
Randle Ballroom C-E
Friday, December 3, 2004
7:00am-11:00am
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Chemotherapy for Relapsed AML: Making the Best out of a Bad Situation
Gary Schiller, MD
University of California, Los Angeles
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Resistant Acute Myeloid Leukemia
Definition
Refractory leukemia
Disease unresponsive to initial induction chemotherapy
Relapsed leukemia
Disease that recurs following an initial
complete remission
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Resistant Acute Myeloid Leukemia
A case history
67-year-old female presented with a history of acute leukemia of F.A.B. M1 phenotype with normal diploid cytogenetics diagnosed 8 years prior to presentation
Initial treatment consisted of 2 cycles of induction chemotherapy and 1 cycle of high-dose cytarabine/mitoxantrone consolidation
Initial remission lasted 5 months
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Resistant Acute Myeloid Leukemia
Therapy for AML in first relapse
Investigational trial of timed-sequential therapy with rHu-G-CSF and 12 doses of high-dose cytarabine
Second remission duration 7 years
At second relapse, leukemia morphology unchanged, but 3/20 cells showed trisomy 8
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Patient Characteristics
Refractory leukemia
High incidence of adverse cytogenetics, antecedent hematologic disturbance, adverse immunophenotypic features, expression of multiple drug resistance
Relapsed leukemia
A heterogeneous group, some secondarily resistant, some biologically favorable. Variable pretreatment features.
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Salvage Chemotherapy Protocols
Most are high-dose cytarabine-based
Non-cytarabine regimens Monoclonal antibody
Combination regimens Anthracycline
Etoposide
Carboplatin
Fludarabine
Radiation
Hematopoietic growth factors
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Factors Predictive of Response to
Salvage Therapy
Response to induction chemotherapy
Duration of first complete remission
<1 year
1-2 years
>2 years
Disease characteristics
Co-morbid disease
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Hazards in Evaluating
Salvage Therapies
Patient selection
Small sample size
Influence of pretreatment characteristics
Influence of co-morbid disease
Variability of initial post-remission treatment
Study design
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Patient Selection
Four distinctive groups with progressively less favorable disease biology
CR > 2 yr, no previous salvage therapy
CR 1-2 yr, no previous salvage therapy
CR <1 yr or without initial CR, no previous salvage therapy
CR <1 yr or without initial CR, on subsequent salvage for unresponsive disease
Estey E, et al. Cancer Chemother Pharmocol. 1997;40:S9.
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Options for Treatment of
Resistant Leukemia
Standard-dose chemotherapy
High-dose (myeloablative) chemotherapy
Autologous bone marrow transplantation
Allogeneic bone marrow transplantation
Combined-sequential therapy
Chemo-modulation
Inhibitors of drug resistance
Immunomodulation
Gemtuzumab ozogamicin
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Studies of Standard-dose Chemotherapy
Cytarabine-based Regimens
Author Year Agents # Patient Characteristics Outcomes
Amadori 1991 Mitoxantrone
VP-16
Ara-C
32 Refractory (18)
Relapsed (8)
After BMT (6)
66% CR
Duration 16W
Carella 1993 Ida
Ara-C
VP-16
92 Refractory (36)
Relapsed (50)
Other (11)
43% CR
Duration 16W
Kusnierz-Glaz 1993 Ida
Ara-C
33 Refractory (3)
Relapsed (10)
MDS (12)
Others (8)
10% CR
Duration 14W
Reese 1993 Mitoxantrone
Ara-C
47 Relapsed (14)
Others (33)
45% CR
Takaku 1985 Ara-C 30 Relapsed Ref (28) 40% CR
Duration 16W
Gore 1989 Ara-C
VP-16
41 Refractory (16)
Relapsed (25)
63% CR
Duration ?
Hiddemann 1986 Ara-C 26 Refractory (5) 50% CR
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Results of Standard-dose
Chemotherapy “Salvage”
•Complete remission rate 25%-60%
•Median remission duration 90-250 days
•Prolonged myelosuppression and toxicity
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Other Chemotherapeutic Approaches
OutcomesPatient Characteristics
#AgentsYear
Author
36% CR
Duration 9 mos
Refractory (9)
Relapsed (50)
59
Fludarabine
Ara-C
1992
Estey
28% CR
Duration 7 mos
Refractory (3)
Relapsed (22)
25
Carboplatin1989
Meyers
3% CRRefractory (6)
Relapsed (25)
31
Homoharringtonine
1989
Kantarjian
47% CR
Duration 7 mos
Refractory (0)
Relapsed (17)
17
2 CDA1992
Santana
42% CR
Duration 4-7 mos
Refractory (21)
Relapsed (31)
Other (9)
61
Mitoxantrone
VP-16
1988
Ho
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Timed-sequential Therapies
Author Year
Agents # Patient Characteristics
Outcomes
Puntous 1993
GM-CSF
Ara-C
Amsacrine
10
Refractory (0)
Relapsed (10)
[Early (1)]
70% CR
Duration 6 mos
Yamada 1995
G-CSF
Ara-C
Aclarubicin
18
Relapsed (18)
Late (12)
83% CR
Duration 6 mos
Schiller 1995
G-CSF
Ara-C
15
Refractory (2)
Relapsed (13)
64% CR
Duration 6 mos
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High-dose Chemotherapy
Author Year
Agents
Tx Type
#PatientCharacteristics Outcomes
Brown 1990
Cy
VP 16
None 40/65
Refractory (20)
Relapsed (20)
42% CR
Duration 3-5 mos
Körbling 1989
TBI/Cy
Purged-auto
30/52
Relapsed (30) 34% DFS @ 2 yr
Yeager 1986
Bu/Cy Purged-auto
25 Relapsed (25) 40% survival @ 2 yr
Gorin 1986
TBI/Cy
Purged-auto
11 Refractory (4)
Relapsed (5)
Other (2)
27% survival @ 1 yr
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Autologous Bone Marrow
Transplantation
Author Purging AgentActuarial Disease-free
Survival
Yeager, et al
NEJM. 1986;315:1471
4HC 43%
Lenarsky, et al
BMT. 1990;6:425-9
4HC 61%
Meloni, et al
Blood. 1990;75:2282
None 52%
Gorin, et al
Blood. 1986;67:1367
Asta Z-7557 25%
Ball, et al
Blood. 1986;68:1311
MoAb + C’ 31%
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Results of Autologous Bone Marrow
Transplantation for Relapsed Leukemia
•Complete remission rate: 50% to 100%
•Median remission duration: 3 to 11 months
•Actuarial leukemia-free survival at 1 year:
10% to 43%
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High-dose Chemotherapy
Author Year
Agents Tx Type
#Patient Characteristics Outcomes
Schnitz 1988
TBI/VP 16
MRD 16 Refractory (3)
Relapsed (9)
54% DFS
Santos 1983
Bu/Cy MRD 33 Refractory (16)
Relapsed (17)
0 +
29% DFS
Forman 1991
TBI/Cy/Ara-C
TBI/VP 16
MRD 21 Refractory (21) 43% DFS
Clift 1992
TBI/Cy MRD 126
First Relapse (126)
23% DFS
Schiller 1994
TBI/Cy
Bu/Cy
MUD 55 Refractory (8)
Relapsed (47)
23% DFS
Sierra 199 TBI/Cy MUD 10 Refractory (14) 12%-27% DFS
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Allogeneic Bone Marrow
Transplantation
Matched related donors
• Refractory disease
– Leukemia-free survival: 18% 5%
– Actuarial relapse rate: 63% 7%
• Relapsed disease
– Leukemia-free survival: 27% 6%
– Actuarial relapse rate: 45% 10%
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Investigational Agents/
New Therapies
Modifiers of multiple-drug resistance
PSC-833
Tamoxifen
Immunomodulatory agents
Interleukin-2
Monoclonal antibodies
Donor leukocytes
Differentiation agents
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Methods for Analyzing
New Therapies
Patient characteristics
Refractory disease
Relapsed disease
<6 mos
6 to12 mos Duration of first remission
>12 mos
Previous salvage therapy
Molecular/cytogenetic disease features
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Methods for Analyzing
New Therapies (cont.)
Avoid the hazards of Phase I/II studies
Dose-escalation
Toxicity vs. response
Develop criteria of response
Remission rate
Duration of response
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New Approaches in AML New chemotherapeutic drugs
Modulation of drug resistance
Sensitization
Anti-angiogenesis
Modulation of cell signaling
Immunotherapeutic
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New Chemotherapeutic Drugs Clofarabine
Phase II clinical trial in 62 patients with AML, MDS, CML in blast crisis, and ALL
32% achieved complete remission
AML of short CR1 CR 2/11
AML with long CR1 CR 7/8
2nd or subsequent relapse CR 8/12
Arsenic trioxide
Kantarjian H, et al, Blood. 2003;102:2379.
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Modulation of Drug Resistance Randomized trials of PSC-833
CALGB trial in older adults
SWOG trial in relapsed/refractory AML
CALGB trial of ADE and PSC-833 in
younger patients
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Tyrosine Kinase Inhibitors in AML
C-kit and FLT-3 are overexpressed in myelobasts
C-kit mutations in AML are rare
Mutations in FLT-3 occur in 20% to 30%
of cases
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FLT-3 inhibitors in AML Novartis PKC412
Cor/Millenium drug
Cephalon drug
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Immunotherapy in AML Immune mediated graft-vs.-leukemia
effect of allogeneic transplantation
Immunomodulatory agents
Tumor antigens
CD33
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Gemtuzumab Ozogamicin (GO) Recombinant humanized anti-CD33
monoclonal antibody
Conjugated with calicheamicin
Internalization of toxin liberated in acidic microenvironment
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GO Trials in AML Phase II trial
N=142, first relapse, age >60, no antecedent MDS, or auto-transplant
CR in 30%
Grade III/IV liver toxicity in 25%
Few infusion-related events
13% deaths, usually disease progression
Sievers EL, et al, J Clin Oncol. 2001;19:3244.
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Farnesyl Transferase Inhibitors Tipifarnib
Phase I trial showed responses in 8 of 25 AML patients
2 patients achieved CR
Phase II trial in 50 evaluable patients showed response to < 5% marrow blasts in 17
Harousseau JL, et al. Proc. Am Soc Clin Oncol. 2002; 21:265.
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Conclusions
Studies of “salvage” treatment are heavily influenced by patient disease characteristics
Alternative, standard chemotherapeutics do not seem to have a significant advantage over single-agent cytarabine
Allogeneic progenitor cell transplantation may be the only means of producing sustained leukemia-free survival
Randomized trials of “salvage” treatment, including allogeneic progenitor cell transplantation, have not been performed
Investigational therapies may best be subjected to analysis of a homogeneous well-characterized
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TREATMENT OPTIONS IN AML:
A PRACTICAL
CASED-BASED APPROACH
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TREATMENT OPTIONS IN AML:
A PRACTICAL
CASED-BASED APPROACH
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Current Status and Controversies in Acute Myeloid Leukemia Induction Therapy
Edward A. Stadtmauer, MDUniversity of Pennsylvania Health
System
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Acute Myeloid Leukemia (AML)
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Acute Myeloid Leukemia• Uncontrolled proliferation of immature bone marrow cells
• Transformed cells incapable of normal differentiation into mature myeloid cells
• Leukemic cells prevent the maturation and differentiation of other bone marrow cells
• Results in anemia, low platelets, and neutropenia
Mortality results primarily from infection, bleeding, or tumor lysis
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Acute Myeloid Leukemia
Median age at diagnosis: 62 to 64 years
Incidence
<65 years of age: 1.8 cases per 100,000
>65 years of age: 16.3 cases per 100,000
Approximately 12,000 cases in 2004
1.2% of all cancer deaths
Most common cause of cancer death in young men and women
Public health problem in older adults
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Age-Specific Incidence Rates for AML
0
5
10
15
20
25
30
35
00-04 05-09 10-14 15-19 20-24 25-29 30-34 35-39 40-44 45-49 50-54 55-59 60-64 65-69 70-74 75-79 80-84 85+
Ave
rag
e A
nn
ua
l R
ate
pe
r 1
00
,00
0
Male
Female
All persons
NCI SEER Program, 1995-1999.
Age (yrs)
1995-1998
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Initial Therapy of AML Diagnosis • Complete remission (CR)
must be attained to cure patient
• CR defined as:— Clearance of peripheral
blood & bone marrow of leukemic blasts
— Reconstitution of normal hematopoiesis
— Resolution of leukemic infiltrates
RemissionInduction
Post-remission Therapy
ConsolidationChemotherapy
SCT
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Remission Induction
Cure
Clinically Detectable Disease
Induction Relapse Relapse
Time
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Post-remission Therapy
Clinically Detectable Disease
Induction Consolidation Consolidation
Time
Cure
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Acute Myeloid Leukemia: Remission Induction
Cytarabine 100mg/m2/day x 7 days continuous infusion + anthracycline bolus x 3 days
– Add ATRA if APL (may delete cytarabine)
Expect 60% to 80% complete remission rateif <60 years
One of the major cancer therapy success stories of the 20th century
But … not all AML has a good prognosis
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Prognostic Factors in AML Age
60 years unfavorable Cytogenetics
Favorable: t(8;21), inv16, t(15;17) Intermediate: normal, -Y, +6, +8; others not
considered favorable or unfavorable Poor: Translocations or inversion of chromosome
3, monosomy 5 or 7, t(6;9), t(9;22), abn 11q23, or complex
Presenting white blood cell count Hyperleukocytosis >100,000/μL unfavorable
Treatment-induced AML or history of myelodysplastic syndrome
Other unfavorable indicators CD34 expression, MDR phenotype, FLT3-
activating mutations, and Bcl-2 expression
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SWOG/ECOG Adult AML; Age <56: Cytogenetics and Survival
Slovak et al. Blood. 2000.
100
80
60
40
20
0
0 2 4 6 8
Years After Entering Study
Heterogeneity of 3 groups: P<.0001
At Risk Deaths Estimated (CI)
at 5 Years
Favorable 121 53 55% (45%-64%)
Intermediate 278 168 38% (32%-44%)
Unfavorable 184 162 11% (7%-16%)
Surv
ival (%
)
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Comparison of Prognostic Factors: Older and Younger Adults With AML
Characteristic <60 years 60 years
#/100,000 in US 1.8 17.6
Cytogenetics
Favorable 6%-12% 1%-4%
Unfavorable 3%-7% 6%-18%
MDR1 expression35% 71%
Secondary AML 8% 20%-50%
Sekeres. Hematology. 2004.
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ECOG AML Survival Data<60 years >60 years
Su
rviv
al
1.0
0.8
0.6
0.2
0.4
0.0
0 10 15 20 255
Years
Study Year. 1989-1997, n=553
Median Survival= 3.2 months
5-Year Survival =12%
Study Year. 1973-1979, n=293
Median Survival= 3.5 months
5-Year Survival =6%
Study Year. 1983-1986, n=142
Median Survival= 6.3, months
5-Year Survival =13%
Su
rviv
al
1.0
0.8
0.6
0.2
0.4
0.0
0 10 15 20 255
Years
Study Year. 1983-1986, n=499
Median Survival= 13.4 months
5-Year Survival =24%
Study Year. 1973-1979, n=454
Median Survival= 11.3 months
5-Year Survival =11%
Study Year. 1989-1997, n=1044
Median Survival= 20.6 months
5-Year Survival =37%
Appelbaum. Hematology. 2001.
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Current Common Clinical Questions
Should every patient with AML receive induction therapy?
How old is old?
What is the best anthracycline?
What is the best dose of cytarabine?
What is the best consolidation?
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Older Adults Are Not as Responsive to or Tolerant of Treatment
Comorbid diseases
Slow metabolism of induction-regimen drugs
Particularly cytarabine
High drug levels
Hesitancy to give full doses
Biologically poor prognosis
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Randomized Trials of Induction Therapy >60 Years
Only 2 studies have been reported
Lowenberg B, et al. J Clin Oncol.1989;7:1268.
Survival advantage for induction chemotherapy but…
21 weeks vs. 11 weeks
Median survival 16 days longer than the time spent in the hospital
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Induction Therapy Decision-Making and Expectations of AML >60 years
Sekeres MA, et al. Leukemia. 2004;18:809.
43 patients >60 years
Approx. 50% chose induction chemotherapy
1-year mortality 63%, no difference in treatment groups
Induction chemotherapy: 79% of first 6 weeks in hospital
Supportive care: 14% of first 6 weeks in hospital
Older patients overestimate potential benefit from induction therapy
74% patients rate chance of cure >50%
90% patients rate 1-year survival >50%
89% physicians rate chance of cure <10%
Most patients do not recall alternatives to therapy received;
all were presented options
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Treatment Options for Older Patient
Be realistic
Supportive care/Palliation Blood and platelet transfusions
Antibiotics
Growth factors
Standard-dose induction chemotherapy
Low-dose chemotherapy Hydrea
Low-dose cytarabine
Clinical trials!
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Is There a Best Antracycline?(Age <60)
Comparisons
Idarubicin 12 mg/m2 vs. daunorubicin Blood 1991, 1992; JCO 1992; EJC 1991
Amsacrine vs daunorubicin Leukemia 1999; JCO 1987
Mitoxantrone vs. daunorubicin Leukemia 1990; Ann Hematol 1994
Summary: Similar outcomes
Current trials: Daunorubicin 45 mg/m2 vs. daunorubicin 90
mg/m2
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Is There a Best Antracycline?(Age >60)
No standard Rowe JM, et al. Blood. 2004;103:479.
Cytarabine 100 mg/m2 intravenously continuous infusion for 7 days
Daunorubicin 45 mg/m2 or mitoxantrone 12 mg/m2 or idarubicin 12 mg/m2 bolus intravenously for 3 days
No difference in efficacy or toxicity (35%-50% CR)
SWOG. Blood. 2002;100:3869. Mitoxantrone and etoposide vs. daunorubicin and
cytarabine No benefit of ME over DA
MRC. Blood. 2001;98:1302. DAT best but not direct comparison at same
cytarabine doses
Summary: Similar outcomes
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Survival by Anthracycline Type
100
80
60
40
20
0
1 2 3 4 5 0
DA n=116MA n=114IA n=118
Rowe JM, et al. Blood 2004;103:479.
Years
Surv
ival (%
)
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Is There a Best Dose of Cytarabine in Induction?
No evidence for a dose escalation above
100 mg/m2
100–200 mg/m2 standard
Addition of high-dose cytarabine to the induction regimen has not yet been shown to increase efficacy, but does increase toxicity
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Consolidation Therapy for AML Age <60 years At least 3 cycles of HiDAC (3g/m2 bid D1,3,5)
Superior to 1 cycle of HiDAC Superior to low-dose cytarabine maintenance Superior to no post-remission therapy
Role of stem cell transplant
Age >60 years No randomized trial shows any post-remission
therapy better than no therapy But . . . all studies showing long term survival
include consolidation Single cycle of HiDAC Repeated cycles of induction therapy Low-dose cytarabine maintenance IL-2 and histamine maintenance
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Summary: AML Remission Induction Therapy
Combination therapy
Cytarabine plus an anthracycline (daunorubicin, idarubicin, or mitoxantrone)
“7+3” schedule
Remission induction rates
70% to 80% in patients 18 to 40 years of age
60% to 70% in patients 40 to 60 years of age
40% to 50% in patients >60 years of age
Standard consolidation includes cycles of HiDAC
30% to 45% long-term relapse-free survival <60 years
No clear benefit for age >60 yearsStone RM. CA Cancer J Clin. 2002;52:363.
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New Approaches in AML Induction Immunotherapeutic approaches
Gemtuzumab ozogamicin IL-2 and histamine dihydrochloride
Cell-signaling modulation FLT3 inhibitors (tyrosine kinase target) Farnesyltransferase inhibitors
Drug-resistance modulation PSC-833 Bcl-2 antisense (oblimersen) Zosquidar (LY335979)
Anti-angiogenic therapy Proteosome inhibition (bortezomib)
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Gemtuzumab Ozogamicin (GO)
Recombinant, humanized murine monoclonal anti-CD33 antibody CD33 expressed on 90% of blasts from patients with AML Absent from normal hematopoietic stem cells
Calicheamicin derivative is a cytotoxic antibiotic Linked by hydrolyzable linker Shown to be active in AML in first relapse >60 years
OH
CH3 CH2
OCH3O
IgG4 anti-CD33Linker
DNA minor groove
binding
Me
O
O
NH
NHN
O
S
H
HOO
OCH3
NH O
O
OCH3
N
O
OCH3HOCH3
OCH3
HNHO
OO
OH
CH3S
CH3
OCH3
I
O
O
O
S
Me Me
OCH3
Calicheamicin derivative
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GO + Chemotherapy in De Novo AML
Pilot study for MRC AML-15 trial
64 patients aged 17 to 59 years treated with induction
GO + chemotherapy
GO (3 or 6 mg/m2) with chemotherapy
DAT: daunorubicin, ara-C, thioguanine
DA: daunorubicin, ara-C
FLAG-Ida: fludarabine, ara-C, G-CSF, idarubicin
86% achieved CR with course 1 of GO + chemotherapy
78% of patients treated with GO + DA or
FLAG-Ida are in continuous CR at median of 8 months
Combination with thioguanine increased hepatotoxicityKell WJ, et al. Blood. 2003;102:4277.
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Age <60 years (n=53) 60 years (n=21)
Dosing Daunomycin 45 mg/m2 Cytarabine 100 mg/m2
Days 1,2,3 Days 1-7
Cytarabine 100 mg/m2 GO 6 mg/m2 Days 1 & 8
Days 1-7
GO 6 mg/m2 Day 4
Cyto-
genetics Favorable 8% 0%
Intermed 60% 72%
Poor 32% 28%
Unknown 6 3
Phase II Studies of GO + Chemotherapy for De Novo AML
DeAngelo. ASH 2003. Oral presentation.
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GO + Chemotherapy: Efficacy
<60 years 60 years Response Rates (n=53)(n=21)
OR 81% 48%CR 79% 43%CRp 2% 5%*
Median OS >15 months 13.4 months
Median RFS 12.8 months 11.1 months
DeAngelo. ASH 2003. Oral presentation.
*Platelet count 97,000/μL; patient lost to follow-up.
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GO + Chemotherapy: Toxicity
<60 years 60 years(n=53)
(n=21)
Elevated bilirubin 17%14%
Elevated AST 19%24%
Elevated ALT 17%14%
VOD
Induction induced 0%0%
*Includes 8 allogeneic, 2 mini-allogeneic, and 2 autologous HSCT†9 allogeneic HSCT
DeAngelo. ASH 2003. Oral presentation.
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GO for De Novo AML in Patients Age 65 Years or Older
Interim report on a Phase II trial of GO as induction, consolidation, and maintenance therapy in previously untreated patients with AML who were ≥65 years of age
n=12 (29 patients planned)
CR in 27% (3/11) evaluable patients
7.6 months median duration of response
Generally well tolerated
No patient experienced grade 3 or 4 hepatic toxicity
No documented VOD or SOS
5 patients developed transient LFT abnormalitiesNabhan C, et al. Leuk Res. 2005;29:53.
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Farnesyltransferase inhibitorsin AML
ras mutations
Activating mutations of ras in 10% to 30% of AML patients
May lead to enhanced proliferation and survival
Inhibition of farnesyltransferase inhibits activation of ras protein
Inhibitors of farnesyltransferase in clinical development
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Tipifarnib (R115777): Phase II Trial in De Novo AML
104 patients with previously untreated high-risk AML and MDS 94 patients with AML
4 patients with MDS
6 patients with CMML
High risk defined as: Age >65 years
Age >18 years with poor cytogenetics
Secondary AML
Dosage: 600 mg p.o. BID for 21 days every2 to 4 weeks
Lancet JE et al. Blood. 2003;102:176a. Abstract 613.
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Tipifarnib: Clinical Activity in De Novo AML
(n=92)
21% CR 33% OR (CR + PR)
36% OR in patients >75 years
Median OS 5.8 months
Median OR in responding patients has not been reached, with 60% alive at 15 months
Toxicity Grade 4 toxicity occurred in 13% of patients,
mainly infection during neutropeniaLancet JE et al. Blood. 2003;102:176a. Abstract 613.
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Trials of Drug Resistance Reversal in AML
Cyclosporine A is a potent inhibitor of p-glycoprotein (MDR1)
PSC-833 is a non-immunosuppressive cyclosporine analog
Randomized trials of PSC-833 in combination with chemotherapy in patients with relapsed/refractory disease did not show benefit
CALGB trial in older adults stopped early because of therapy-related deaths in PSC-833 group
A SWOG trial in relapsed/refractory AML with continuous infusion DnR/HiDAC +/– CyA showed no difference in CR rate but lower relapse rate resulting in survival advantage
CALGB trial of ADE +/– PSC-833 in patients aged
Baer MR, et al. Blood. 2002;100:1224-1232.2. Kolitz JE, et al. Blood. 2001;98:461a.
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Current Comparative Clinical Trials Investigating Induction Chemotherapy
Age <60
ECOG: dauno (45mg/m2)/ara-C vs. dauno (90mg/m2)
SWOG: dauno/ara-C +/– GO
EORTC: ida/ara-C vs. ida/HiDAC
HOVON: ida/ara-C vs. ida/HiDAC +/– G-
CSF
MRC: dauno/HiDAC vs. FLAG-ida +/– GO
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Current Comparative Clinical Trials Investigating Induction Chemotherapy
Age >60
CALGB: dauno/ara-C +/– oblimersen (Bcl-2 antisense)
ECOG: dauno/ara-C +/– zosquidar (MDR modulator)
SWOG: dauno/ara-C +/– cyclosporine A
EORTC: ida/ara-C +/– GO
HOVON: dauno (45mg/m2)/ara-C vs. dauno (90mg/m2)
MRC: dauno/ara-C vs. Hydrea/low-dose ara-C +/– ATRA
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AML Induction Therapy Conclusions AML remains a challenging disease to
induce into complete remission, particularly for older patients
Many targeted approaches in combination with anthracycline and cytarabine hold promise for improved patient outcomes
Age (years) Remission (%)
18-40 70-80
40-60 60-80
>60 10-35
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TREATMENT OPTIONS IN AML:
A PRACTICAL
CASED-BASED APPROACH
Corporate Friday Symposium
Manchester Grand Hyatt
Randle Ballroom C-E
Friday, December 3, 2004
7:00am-11:00am
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The Role of Transplantation in Acute
Myelogenous Leukemia (AML)
Michael W. Schuster, M.D.
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Case Presentation
45-year-old Wall Street investment banker presents to the ER with fevers and epistaxis. He is found to have a WBC count of 18,000 with 80% blasts and a platelet count of 4,000. A bone marrow aspirate and biopsy confirm the dx of M0 AML. Cytogenetics reveal monosomy 7, and he goes into prompt remission following “7&3” induction chemotherapy. A younger brother with a “wild lifestyle” is a perfect HLA match.
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“We show that patients assigned to allo-SCT have a significantly better outcome…”
EORTC-LG/GIMEMA AML-10
“The number of relapses were substantially lower in the autologous BMT group”
MRC 10
“We conclude that intensive consolidation chemotherapy should be considered the standard post-remission therapy in adults with AML in CR1”
GOELAM
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Mixed Results With Transplantation as Consolidation
EORTC/GIMEMA study showed benefit to both auto and allo transplant arms
MRC 10 trial showed benefit to auto transplant arm
American Cooperative Group study showed no benefit to either auto or allo arm
GOELAM study showed no benefit to auto transplant arm
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Autologous or Allogeneic Bone Marrow Transplantation (BMT) Compared With Intensive Chemotherapy in AML
EORTC GIMEMA study
Randomized 623 patients in complete remission
Autologous as well as allogeneic bone marrow transplantation results in better disease-free survival than intensive consolidation chemotherapy with high-dose cytarabine and daunorubicin
Zittoun RA, et al. N Engl J Med. 1995; 332:217.
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Zittoun R. A. et al. N Engl J Med. 1995;332:217.
Disease-free Survival After Autologous or Allogeneic BMTor a Second Course of Intensive Consolidation Therapy
Intensive therapy 126 74 37 24 17 7 1
Autologous BMT 128 76 49 38 26 10 4
Allogeneic BMT 168 87 63 48 29 15 0
55%±4%
48%±5%
30%±4%
Intensive therapy (n=126; 81 events)
Autologous BMT (n=128; 64 events)
Allogeneic BMT (n=168; 70 events)
100
80
70
60
50
40
30
20
10
90
0 4 5 6 71 2 3
Years
Dis
ea
se-f
ree S
urv
ival (%
)
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Zittoun R. A. et al. N Engl J Med. 1995;332:217.
Overall Survival After a First Complete Remission With Autologous or Allogeneic BMT or a Second
Course of Intensive Consolidation Therapy
100
Patients at Risk
Intensive Therapy 126 95 67 40 25 9 2
Autologous BMT 128 94 60 45 29 12 4
Allogeneic BMT 168 100 67 50 31 16 0
90
80
70
60
50
40
30
20
10
0 1 2 3 4 5 6 7
Ove
rall
Su
rviv
al (%
)
Year
Intensive Therapy (n = 126; 57; events)
Autologous BMT (n = 128; 50 events)
Allogeneic BMT (n = 168; 61 events)
59%±4%
56%±5%
46%±5%
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AML in First Complete Remission (CR1)
EORTC/GIMEMAAML-10 trial
Of 1198 patients younger than 46 years of age, 822 achieved CR
734 patients received a single intensive consolidation (IC) course
293 had a sibling donor and 441 did not
Allo-SCT and auto-SCT were performed in 68.9% and 55.8%
The DFS rates were 43.4% and 18.4%, respectively, in patients whose leukemia had bad/very bad risk cytogenetics
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DFS From CR According to Donor Availability
Suciu S, et al, Blood. 2003;102:1232.
100
90
80
70
60
50
40
30
20
10
0
0 4 6 82
Events/Patients Number of patients at risk:
229 /441 171 91 28 No Donor
126/293 336 80 33 Donor
52.2% (±3.2%) 38.4% 17.41%
42.2% (±2.6%) 52.2% 5.3%
P=.044
Relapse Death in CR
Perc
en
t P
atien
ts A
live in C
R
Years
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Relapse Death in CR
71/94 21 32 6 No Donor
32/61 28 39 8 Donor
51/104 45 25 8 No Donor
32/61 25 11 3 Donor
DFS From CR According to Donor Availability in Four Cytogenetic Groups
100
80
60
40
20
00 4 6 82
23/73 45 25 9 No Donor
68/5 27 18 4 Donor
65.7% (±5.9% 28.3% 6.0%
62.1% (±7.2% 21.9% 26.9%
P=.54
100
80
60
40
20
0 4 62
48.5% (±5.3%) 46.6% 5.0%
45.2% (±6.7%) 35.1% 19.7%
Relapse Death in CR
P=.510
100
80
60
40
20
00 4 6 82
Ev/Pt Number of patients at risk:
43.4% (±6.5%) 38.2% 38.4%
18.4% (±4.3%) 78.9% 3.2%
Relapse Death in CR
P=.0078
100
80
60
40
20
00 4 6 82
57.8% (±5.2%) 26.5% 15.7%
41.2% (±4.3%) 53.8% 5.0%
Relapse Death in CR
P=.0078
84/170 60 29 5 No Donor
41/148 56 32 18 Donor
8Years
Pe
rcen
t P
atie
nts
Aliv
e in
CR
Years
Ev/Pt Number of patients at risk:
Pe
rcen
t P
atie
nts
Aliv
e in
CR
Ev/Pt Number of patients at risk:
Ev/Pt Number of patients at risk:
Good Risk
Unknown RiskBad/Very Bad Risk
Intermediate Risk
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MRC AML-10 Trial 381 patients were randomized
Superior disease-free survival at 7 years
(53% vs. 40%; P=.04)
The addition of autologous BMT to 4 courses of intensive chemotherapy substantially reduces the risk of relapse in all risk groups, leading to improvement in long-term survival
Burnett et al. Lancet. 1998;351:687.
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Chemotherapy Compared With Autologous or Allogeneic BMT in the Management of AML in First Remission
American Cooperative Group study shows
no difference
740 patients eligible
Survival after complete remission was somewhat better after chemotherapy than after autologous marrow transplantation (P=.05) or after allogeneic marrow transplantation (P=.04)
Cassileth PA, et al. N Engl J Med. 1998;339:1649.
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Cassileth PA, et al. N Engl J Med. 1998;339:1649.
Probability of Disease-free Survival According to Post-remission Therapy
1.0
0.8
0.6
0.4
0.2
1.51.00.50.0
0.0
3.53.02.52.0 4.54.0 5.0
Time Since Remission (yr)
Pro
po
rtio
n S
urv
ivin
g
Wit
ho
ut
Dis
ea
se
Group No. of Event/No. at Risk
Autologous transplantation 48/116 18/66 4/45 2/34 0/22
Allogeneic transplantation 41/113 14/71 5/55 1/32 0/22
Cytarabine 48/117 21/69 5/47 1/29 0/18
Autologous bone marrow transplantationAllogeneic bone marrow transplantationHigh-dose cytarabine
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GOELAM study also showed no benefit to transplant as consolidation therapy
517 eligible patients studied
The type of post-remission therapy had no significant impact on the outcome
Harousseau JL, et al. Blood. 1997;90:2978.
Comparison of Autologous BMT and Intensive
Chemotherapy as Post-remission Therapy in
Adult AML
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Allogeneic BMT (n = 88)
First Course of ICC (n=134)Log-ranked test: P=.62
No Benefit With Either Auto-or Allo-Transplant
Harousseau JL, et al, Blood. 1997;90:2978.
1.0
0.5
0.00 48 60 10812 24 36 72 84 96
Time in months
1.0
0.5
0 48 6012 24 36 72 84 96
Autologous BMT (n = 86)
First Course of ICC (n=78)Log-ranked test: P=.41
Time in months
0.0
Dis
ease
-fre
e S
urv
ival
Dis
ease
-fre
e S
urv
ival
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How Do We Reconcile the Four Studies?
GOELAM may have had superior results because of greater dose intensity of consolidation chemotherapy (24 g vs. 6 g of ara-C)
GOELAM had an unusually high relapse rate in the allo arm
GOELAM introduced amsacrine and etoposide into consolidation treatment
Two of the studies had a course of consolidation before transplant; 2 did not –
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Reduced Intensity Transplants
IV busulfan with fludarabine – anti-leukemic efficacy at least equal to BuCy
? the “new standard”
de Lima M, Courial D, Shehjahan M et al. Blood. 2004;104: Abstract 97
First-line therapy in CR1 also with fludarabine and busulfan – low incidence of NRM
LFS at 18 mos in high-risk pts, 75%
“a valid option in AML”
Blaise D. Bouron JM, Faucher C, et al. Blood. 2004;104;Abstract 101
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NST vs. Myeloablative Transplant at Relapse
How do you decide: auto vs. allo vs.
non-myeloablative?
Results with NST vs. myeloablative may be comparable
Alyea EP, et al. Blood. 2004
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Causes of Treatment FailureNon-myeloablative
51%
22%
22%
5% 0%
Relapse
GVHD
Infection
Other
Pulmonary
Myeloablative
30%
12%
9%9%
40%Relapse
GVHD
Infection
Other
Pulmonary
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TREATMENT OPTIONS IN AML:
A PRACTICAL
CASED-BASED APPROACH
Corporate Friday Symposium
Manchester Grand Hyatt
Randle Ballroom C-E
Friday, December 3, 2004
7:00am-11:00am
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Chemotherapy for Relapsed AML: Making the Best out of a Bad Situation
Gary Schiller, MD
University of California, Los Angeles
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Resistant Acute Myeloid Leukemia
Definition
Refractory leukemia
Disease unresponsive to initial induction chemotherapy
Relapsed leukemia
Disease that recurs following an initial
complete remission
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Resistant Acute Myeloid Leukemia
A case history
67-year-old female presented with a history of acute leukemia of F.A.B. M1 phenotype with normal diploid cytogenetics diagnosed 8 years prior to presentation
Initial treatment consisted of 2 cycles of induction chemotherapy and 1 cycle of high-dose cytarabine/mitoxantrone consolidation
Initial remission lasted 5 months
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Resistant Acute Myeloid Leukemia
Therapy for AML in first relapse
Investigational trial of timed-sequential therapy with rHu-G-CSF and 12 doses of high-dose cytarabine
Second remission duration 7 years
At second relapse, leukemia morphology unchanged, but 3/20 cells showed trisomy 8
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Patient Characteristics
Refractory leukemia
High incidence of adverse cytogenetics, antecedent hematologic disturbance, adverse immunophenotypic features, expression of multiple drug resistance
Relapsed leukemia
A heterogeneous group, some secondarily resistant, some biologically favorable. Variable pretreatment features.
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Salvage Chemotherapy Protocols
Most are high-dose cytarabine-based
Non-cytarabine regimens Monoclonal antibody
Combination regimens Anthracycline
Etoposide
Carboplatin
Fludarabine
Radiation
Hematopoietic growth factors
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Factors Predictive of Response to
Salvage Therapy
Response to induction chemotherapy
Duration of first complete remission
<1 year
1-2 years
>2 years
Disease characteristics
Co-morbid disease
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Hazards in Evaluating
Salvage Therapies
Patient selection
Small sample size
Influence of pretreatment characteristics
Influence of co-morbid disease
Variability of initial post-remission treatment
Study design
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Patient Selection
Four distinctive groups with progressively less favorable disease biology
CR > 2 yr, no previous salvage therapy
CR 1-2 yr, no previous salvage therapy
CR <1 yr or without initial CR, no previous salvage therapy
CR <1 yr or without initial CR, on subsequent salvage for unresponsive disease
Estey E, et al. Cancer Chemother Pharmocol. 1997;40:S9.
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Options for Treatment of
Resistant Leukemia
Standard-dose chemotherapy
High-dose (myeloablative) chemotherapy
Autologous bone marrow transplantation
Allogeneic bone marrow transplantation
Combined-sequential therapy
Chemo-modulation
Inhibitors of drug resistance
Immunomodulation
Gemtuzumab ozogamicin
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Studies of Standard-dose Chemotherapy
Cytarabine-based Regimens
Author Year Agents # Patient Characteristics Outcomes
Amadori 1991 Mitoxantrone
VP-16
Ara-C
32 Refractory (18)
Relapsed (8)
After BMT (6)
66% CR
Duration 16W
Carella 1993 Ida
Ara-C
VP-16
92 Refractory (36)
Relapsed (50)
Other (11)
43% CR
Duration 16W
Kusnierz-Glaz 1993 Ida
Ara-C
33 Refractory (3)
Relapsed (10)
MDS (12)
Others (8)
10% CR
Duration 14W
Reese 1993 Mitoxantrone
Ara-C
47 Relapsed (14)
Others (33)
45% CR
Takaku 1985 Ara-C 30 Relapsed Ref (28) 40% CR
Duration 16W
Gore 1989 Ara-C
VP-16
41 Refractory (16)
Relapsed (25)
63% CR
Duration ?
Hiddemann 1986 Ara-C 26 Refractory (5) 50% CR
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Results of Standard-dose
Chemotherapy “Salvage”
•Complete remission rate 25%-60%
•Median remission duration 90-250 days
•Prolonged myelosuppression and toxicity
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Other Chemotherapeutic Approaches
OutcomesPatient Characteristics
#AgentsYear
Author
36% CR
Duration 9 mos
Refractory (9)
Relapsed (50)
59
Fludarabine
Ara-C
1992
Estey
28% CR
Duration 7 mos
Refractory (3)
Relapsed (22)
25
Carboplatin1989
Meyers
3% CRRefractory (6)
Relapsed (25)
31
Homoharringtonine
1989
Kantarjian
47% CR
Duration 7 mos
Refractory (0)
Relapsed (17)
17
2 CDA1992
Santana
42% CR
Duration 4-7 mos
Refractory (21)
Relapsed (31)
Other (9)
61
Mitoxantrone
VP-16
1988
Ho
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Timed-sequential Therapies
Author Year
Agents # Patient Characteristics
Outcomes
Puntous 1993
GM-CSF
Ara-C
Amsacrine
10
Refractory (0)
Relapsed (10)
[Early (1)]
70% CR
Duration 6 mos
Yamada 1995
G-CSF
Ara-C
Aclarubicin
18
Relapsed (18)
Late (12)
83% CR
Duration 6 mos
Schiller 1995
G-CSF
Ara-C
15
Refractory (2)
Relapsed (13)
64% CR
Duration 6 mos
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High-dose Chemotherapy
Author Year
Agents
Tx Type
#PatientCharacteristics Outcomes
Brown 1990
Cy
VP 16
None 40/65
Refractory (20)
Relapsed (20)
42% CR
Duration 3-5 mos
Körbling 1989
TBI/Cy
Purged-auto
30/52
Relapsed (30) 34% DFS @ 2 yr
Yeager 1986
Bu/Cy Purged-auto
25 Relapsed (25) 40% survival @ 2 yr
Gorin 1986
TBI/Cy
Purged-auto
11 Refractory (4)
Relapsed (5)
Other (2)
27% survival @ 1 yr
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Autologous Bone Marrow
Transplantation
Author Purging AgentActuarial Disease-free
Survival
Yeager, et al
NEJM. 1986;315:1471
4HC 43%
Lenarsky, et al
BMT. 1990;6:425-9
4HC 61%
Meloni, et al
Blood. 1990;75:2282
None 52%
Gorin, et al
Blood. 1986;67:1367
Asta Z-7557 25%
Ball, et al
Blood. 1986;68:1311
MoAb + C’ 31%
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Results of Autologous Bone Marrow
Transplantation for Relapsed Leukemia
•Complete remission rate: 50% to 100%
•Median remission duration: 3 to 11 months
•Actuarial leukemia-free survival at 1 year:
10% to 43%
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High-dose Chemotherapy
Author Year
Agents Tx Type
#Patient Characteristics Outcomes
Schnitz 1988
TBI/VP 16
MRD 16 Refractory (3)
Relapsed (9)
54% DFS
Santos 1983
Bu/Cy MRD 33 Refractory (16)
Relapsed (17)
0 +
29% DFS
Forman 1991
TBI/Cy/Ara-C
TBI/VP 16
MRD 21 Refractory (21) 43% DFS
Clift 1992
TBI/Cy MRD 126
First Relapse (126)
23% DFS
Schiller 1994
TBI/Cy
Bu/Cy
MUD 55 Refractory (8)
Relapsed (47)
23% DFS
Sierra 199 TBI/Cy MUD 10 Refractory (14) 12%-27% DFS
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Allogeneic Bone Marrow
Transplantation
Matched related donors
• Refractory disease
– Leukemia-free survival: 18% 5%
– Actuarial relapse rate: 63% 7%
• Relapsed disease
– Leukemia-free survival: 27% 6%
– Actuarial relapse rate: 45% 10%
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Investigational Agents/
New Therapies
Modifiers of multiple-drug resistance
PSC-833
Tamoxifen
Immunomodulatory agents
Interleukin-2
Monoclonal antibodies
Donor leukocytes
Differentiation agents
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Methods for Analyzing
New Therapies
Patient characteristics
Refractory disease
Relapsed disease
<6 mos
6 to12 mos Duration of first remission
>12 mos
Previous salvage therapy
Molecular/cytogenetic disease features
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Methods for Analyzing
New Therapies (cont.)
Avoid the hazards of Phase I/II studies
Dose-escalation
Toxicity vs. response
Develop criteria of response
Remission rate
Duration of response
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New Approaches in AML New chemotherapeutic drugs
Modulation of drug resistance
Sensitization
Anti-angiogenesis
Modulation of cell signaling
Immunotherapeutic
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New Chemotherapeutic Drugs Clofarabine
Phase II clinical trial in 62 patients with AML, MDS, CML in blast crisis, and ALL
32% achieved complete remission
AML of short CR1 CR 2/11
AML with long CR1 CR 7/8
2nd or subsequent relapse CR 8/12
Arsenic trioxide
Kantarjian H, et al, Blood. 2003;102:2379.
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Modulation of Drug Resistance Randomized trials of PSC-833
CALGB trial in older adults
SWOG trial in relapsed/refractory AML
CALGB trial of ADE and PSC-833 in
younger patients
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Tyrosine Kinase Inhibitors in AML
C-kit and FLT-3 are overexpressed in myelobasts
C-kit mutations in AML are rare
Mutations in FLT-3 occur in 20% to 30%
of cases
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FLT-3 inhibitors in AML Novartis PKC412
Cor/Millenium drug
Cephalon drug
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Immunotherapy in AML Immune mediated graft-vs.-leukemia
effect of allogeneic transplantation
Immunomodulatory agents
Tumor antigens
CD33
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Gemtuzumab Ozogamicin (GO) Recombinant humanized anti-CD33
monoclonal antibody
Conjugated with calicheamicin
Internalization of toxin liberated in acidic microenvironment
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GO Trials in AML Phase II trial
N=142, first relapse, age >60, no antecedent MDS, or auto-transplant
CR in 30%
Grade III/IV liver toxicity in 25%
Few infusion-related events
13% deaths, usually disease progression
Sievers EL, et al, J Clin Oncol. 2001;19:3244.
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Farnesyl Transferase Inhibitors Tipifarnib
Phase I trial showed responses in 8 of 25 AML patients
2 patients achieved CR
Phase II trial in 50 evaluable patients showed response to < 5% marrow blasts in 17
Harousseau JL, et al. Proc. Am Soc Clin Oncol. 2002; 21:265.
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Conclusions
Studies of “salvage” treatment are heavily influenced by patient disease characteristics
Alternative, standard chemotherapeutics do not seem to have a significant advantage over single-agent cytarabine
Allogeneic progenitor cell transplantation may be the only means of producing sustained leukemia-free survival
Randomized trials of “salvage” treatment, including allogeneic progenitor cell transplantation, have not been performed
Investigational therapies may best be subjected to analysis of a homogeneous well-characterized
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TREATMENT OPTIONS IN AML:
A PRACTICAL
CASED-BASED APPROACH