past decade of genomic investigations - peacehealth...himabindu ramachandrareddy fu chunsun jiang...
TRANSCRIPT
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A decade of Genomic research
From bench to bedside
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Promises of Genomic research in Cancer
• Rapid advance in our understanding of the molecular mechanisms determining tumor behavior
• Discovery of new therapeutic targets
• Better and less toxic target directed therapy
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Director’s Challenge 1999-2005
• Employing the DNA microarray technology for large scale gene expression profiling – cDNA microarray: Pat Brown at Stanford
– Lymphochip: Lou Staudt at the NCI
• Collaborative study on B-cell lymphoma – UNMC
– Stanford
– BCCA
– NCI
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First investigation produced promising results with DLBCL
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Validation of the initial findings and identification of a third subtype
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GCB and PM DLBCL have better
OS
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Gene-Expression Predictors of Survival on DLBCL Patients Treated with R-CHOP
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Mantle cell lymphoma: in situ, cyclinD1 positive and negative types
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Prognosticator for MCL
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Prognosticators: Bad guys and their neighborhood
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Formation of the LLMPP
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Getting the signatures from other lymphomas
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Expansion into uncommon tumors the International T-cell Lymphoma study
AITL ATLL A LCL-ALK(+)
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SpiB BTLA4 SYK
LILRB2 KYNU JAG1 SPOCK1 CD163 MS4A4A FCN1 LAMP1 TCF7L2 ZNF395 MS4A4A KYNU IQGAP2 MS4A6A VSIG4 RPL28 CUGBP2 CD9 KYNU ABCC3 CRIM1 MS4A6A CD209 KCNMA1 MARCKS DAB2 TNFAIP6 NASET2 CHPT1 HDAC9 NEDD9 NPL CCL8 PRDX1 IGFBP7 LMO2 CD55 EMG1 PLEKHA5 DUSP6 FYB TNFRSF4
MEG3 PDGFRA SPOCK1 HOXC6 C7 BASP1 APOD SEMA3C COL1A2 HNMT COL3A1 PTX3 ADCY7 SLC22A3 NPY1R CD44 RHOBTB3 MYH11 ABCA8 IGF1 CHRDL1 PTPRG CUGBP2 SRPX CXCL12 COL1A1 ASPA SFRP4 UST MGP TNFAIP6 OLFML1 COL14A1 FEZ1 MBP IGF1 GALNT12 FGF7 OMD OMD ANGPT1 CDKN2C TNXB ECM2
Tole
roge
nic
DC
ce
ll si
gnat
ure
C
D3
1 (
-) s
tro
mal
si
gnat
ure
RPL11 RPL13A RPL15 RPL28 RPL29 RPL4 RPL6 RPL7A RPLP0 RPS10 RPS11 RPS14 RPS19 RPS5 RPS6 RPS7 RRAS2
OS
EFS
P<0.001
A
B Good Poor
SEMA5A,
SEC16B,
LILRB2,
MSRB3,
RHOU
ADAMTS12,
VCAN
LOC728192,
BDNF
PRR5
PLEKHA6
MEG3
NCF4
ZBED2
IGFL2
Good Poor
Prognostic Groups
Prognostic groups
15 gene predictor
AITL cases Years
Years
P<0.001
B c
ell r
elat
ed
Pro
tein
syn
thes
is
Kaplan-Meier curves for risk groups obtained from cross validation:
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The age of CHIPs: development of high resolution platforms for determining copy
number abnormalities (CNAs)
• NimbleGen: CGH oligonucleotide array; 386,165 probes
• Tumor sample labeled Cy3, control Cy5
• 203 de novo DLBCL patient samples and 30 DLBCL cell
lines
• Classification according to gene expression profiling:
72 GCB DLBCL
74 ABC DLBCL
31 PMBL
26 unclassified DLBCL
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c-m
yc
1 M
b d
ele
tion
AmplificationDeletion
c-m
yc
1 M
b d
ele
tion
AmplificationDeletion
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The marriage of GEP and aCGH
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The mighty microRNA
Non-coding RNA • Ribosomal RNAs
• Transfer RNAs
• microRNAs
• Piwi-associated RNAs
• siRNA
• Various longer non-coding RNAs
– mRNA splicing
– Ribosome biogenesis
– Gene silencing, imprinting
• New members of these classes and new classes may be discovered by high throughput sequencing especially in unique cell types
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Structure of mir-17-92 cluster
He et al., Nature 2005
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Symbol Full name Total
Score
1 CD69 CD69 molecule -2.16
2 ATXN1 ataxin 1 -2.06
3 BMPR2 bone morphogenetic protein receptor, type II -1.71
4 CLIP4 CAP-GLY domain containing linker protein 4 -1.57
5 ITGB8 integrin, beta 8 -1.52
13 PHLPPL PH domain and leucine rich repeat protein
phosphatase-like -1.29
14 PTEN phosphatase and tensin homolog (mutated in
multiple advanced cancers 1) -1.28
38 BCL2L11 BCL2-like 11 (apoptosis facilitator) -1.07
Putative Targets of the miR-17~92
Negative regulator of the PI3K /AKT pathway
Proapoptotic factor
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PTEN is a Direct Target of the miR17-92 Cluster
NIH 3T3 cells HEK293T cells
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MiR-17~92 Overexpression Induces the PI3K/AKT Pathway Activation
pAKT-S473
Total AKT
GSK-3β
p70S6K
Tubulin
Ve
cto
r
Mir
-17
~92
Z138c Cells
Flow Cytometry Using anti-pAKT-S473
IgG Isotype
Vector
Mir-17~92
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The unstable genome Legacy of generous AID
MYC BCL2 RHOH PIM1 PAX5 SOSC1 EZH2
BCL6
PRDM1
TP53
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NF-kB pathway genes found mutated in DLBCL
Gene symbol (synonym) Number of mutated/tested cases (%)
ABC-DLBCL GCB-DLBCL Non-GC/NC- TNFAIP3 (A20) 9/37 (24.3) 1/44 (2.3) 4/20 (20)
CARD11 4/37 (10.8) 3/44 (6.8)** 2/20 (10)
TNFRSF11A (RANK) 3/37 (8.1)* 1/44 (2.3) 2/20 (10)
TRAF5 2/37 (5.4) 2/44 (4.5) 1/20 (5)
TRAF2 1/37 (2.7) 4/44 (9.1)*** 1/20 (5)
MAP3K7 (TAK1) 2/37 (5.4) 0/44 0/20
All genes 19/37 (51.3) 10/44 (22.7)# 7/20 (35)
* One additional cell line was found to carry a mutation in a minority of the population.
** Two of the three mutated samples are cell lines; analysis restricted to exons 4–9, encoding the
coiled-coil domain.
*** Three of the four mutated samples are cell lines.
# Four of the ten mutated samples are cell lines.
[From Compagno M et al Nature 459:717, 09]
CARD11 MUTATION IN DLBCL Georg Lenz, et al Science 319: 1676-1679, 2008
NF-kB pathway activated by gene mutations
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MYD88 mutations in B-cell lymphoma
Ngo V et al Nature 470:115-9; 2011
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CD79B and CD79A mutation
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Next generation sequencing
• Many important mutations including novel translocations have been and will be discovered
• Interestingly, many of these affect the epigenome, eg
– EZH2
– MLL2
– IDH1,2
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PRDM1a Promoter Methylation in NKL cases
Methylation=no expression? That is the question
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Histone modifications in the genome modify gene expression
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The tails of four histones
• Acetylation
• Methylation
• Phosphorylation
• Ubiquitination
• Sumoylation
• ADP- ribosylation
• Proline-isomerization
Verdone et al., (2005)
Lysine residues
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JAK2 as a chromatin modifier:
H3Y41 phosphorylation prevents HP1a chromoshadow domain binding
Dawson MA Science 461:819; 2010
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9p24 amplicon in PMBL
Rui et al Cancer Cell 18:590; 2010
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JAK 2 dependent H3Y41 phosphorylation
Rui et al Cancer Cell 18:590; 2010
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Rui et al Cancer Cell 18:590; 2010
JAK2 and JMJD2C in chromatin remodeling: Role in the pathobiology of PMBL
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Bridging the gap between discovery and clinical practice
• Most of the studies and results obtained from cryopreserved tissue with high quality DNA and RNA
• Clinical setting with mostly fixed paraffin embedded tissue (FFPET)
• Either change the way tissue is acquired and processed or adapt the assays to FFPET
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Wax, wax and more wax Using immunohistochemical assays
CD10 (≥30%)
GCB (29 cases)
Non-GCB (14 cases)
MUM1 (≥30%)
GCB (12 cases)
BCL6 (polyclonal)
(≥30%)
Non-GCB (29 cases)
+
-
+
+
-
(2/29 ABC by GEP)
(5/29 GCB by GEP)
(1/12 ABC by GEP)
Hans’ Algorithm
-
(4/14 GCB by GEP)
(all match with GEP)
(2/19 GCB by GEP)
GCET1(≥80%)
MUM1 (≥80%)
CD10 (≥30%)
ABC (3 cases)
GCB (27 cases)
GCB (12 cases)
FOXP1 (≥80%)
ABC (19 cases)
BCL6 (monoclonal)
(≥30%)
GCB (10 cases)
ABC(13 cases)
+
-
+
-
+
-
+
-
+
-
(all match with GEP)
(all match with GEP)
(1/12 ABC by GEP)
(3/10 ABC by GEP)
Choi’s Algorithm
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MicroRNA in molecular diagnosis: Correlation of miRNA profiles between paired frozen and FFPE
samples
0
5
10
15
20
25
30
0 5 10 15 20 25 30
0
5
10
15
20
25
30
0 5 10 15 20 25 30
0
5
10
15
20
25
30
0 5 10 15 20 25 30
0
5
10
15
20
25
30
0 5 10 15 20 25 30
5 4 7 3
Fre
sh F
roze
n s
amp
les
(Δ
Ct)
FFPE samples ( ΔCt)
r=0.94 r=0.95 r=0.94
r=0.95
FFPE block in years
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Training set
LOOCV
(% probability)
35 m
iRN
A
Probability in BL Probability in DLBCL
GEP classification
BL DLBCL
miRNA classifier for Burkitt Lymphoma
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Other platforms
• qRT-PCR – Possible to perform in a high throughput format
• GEP on FFPET – Technically feasible
– Degree of loss of information acceptable
– Still a rather complicated platform
• Non-PCR based transcript quantitation – Nanostring
– High Throughput Genomics
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Complexity, Complexity, Complexity
• Can we have one platform that provides all the relevant information?
• Can high throughput seq covers all/most of the grounds? Genomic or transcriptome seq?
• How are we going to make sense of all these data?
• Can GEP/pathway analysis integrate the functional effects of diverse pathogenic mechanisms?
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Testing the concept • Accurately diagnose and classify the tumor
• Identify the critical molecular abnormalities present
• Apply treatment directed at the proper molecular targets
Caveat:
Up or down regulation of a pathway, even when it seems very compelling biologically as a critical pathway, does not necessary mean that it would be a good therapeutic target
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GSEA analysis of STAT3 hi/lo ABC DLBCL
STAT3 as a therapeutic target
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Cross-talk between STAT3 and NF-kB pathway in DLBCL
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JAK and/NF-kB inhibition in ABC DLBCL
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Activation of the Stat3 Pathway Predicts Poor Survival in Non-GCB-DLBCL but not in GCB-DLBCL
Non-GCB DLBCL
GCB DLBCL
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Pathway analysis for pathway directed therapy
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A B C D
E F G H
pYSTAT3 BCL6 MUM1 H&E
pYSTAT3 and CD20 double staining
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Bench
Bedside
Molecular Pathogenesis
(identify)
Target Discovery/Validation
(authenticate/develop)
Clinical Trials
(delivery)
Research Goal
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ACKNOWLEDGEMENT LLMPP Consortium
• University of Nebraska Medical Center – D. Weisenburger, T. Greiner, K. Fu, W. Sanger, B.Dave, J. Vose, J. Armitage
• National Cancer Institute L. Staudt, E. Jaffe, W. Wilson
• Southwest Oncology Group – University of Arizona L Rimsza
– University of Rochester R. Fisher
– University of Oregon R. Braziel
– Cleveland Clinics R. Tubbs
• British Columbia Cancer Agency R. Gascoyne, J. Connors
• University of Wurzburg, Germany K. Muller-Hermelink, A. Rosenwald
• University of Barcelona E. Campos
• Radium Hospital, Norway E. Smeland, J. Delabie
• St. Bart, London, UK A. Lister, J. FrizGibbon
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Chan lab and collaborators
McKeithan Alyssa Bourska Himabindu Ramachandrareddy
Fu Chunsun Jiang Wenfeng Cao Jirong Bai Xin Huang Chengfeng (Andy) Bi
Iqbal Can Kucuk Zhongfeng Liu Sharathkumar M Bhagavathi Xiaozhou Hu
Deffenbacher Cindy Lachel Peter Julius
Yulei Shen Yanyan Liu Cuiling Liu
Greiner Deb Lytle
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