cáncer y vitamina d - fesemi.org · dh vehiculo 1a,25(oh)d 3 dkk-1 dkk-1 3 . snail1 induce...
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Cáncer y vitamina D
Alberto Muñoz
Instituto de Investigaciones Biomédicas, Madrid
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1,25-Dihydroxyvitamin D3 and malignant melanoma:
the presence of receptors and inhibition of cell growth in culture
Colston, K., Colston, M.J., and Feldman, D.
Endocrinology 108, 1083-1086, 1981
Differentiation of mouse myeloid leukemia cells
induced by 1a,25-dihydroxyvitamin D3
Abe et al.,
PNAS 78, 4990-4994, 1981
Vitamin D and Cancer: the beginning
Dr. David Feldman
Stanford University School of Medicine
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1930s, Peller y Stephenson
Tener un cáncer de piel proporciona inmunidad contra otros cánceres (personal Marina USA)
1941, Apperly
Existe una correlación inversa entre latitud y mortalidad por cáncer
1980, Garland y Garland
La vitamina D es la responsable de la correlación inversa entre la exposición a la radiación UV solar y
el riesgo de cáncer de colon
más tarde, se propone la misma relación con cáncer de mama, ovario… hasta 15 neoplasias
2015, la asociación más clara es con cáncer de colon/colorrectal, luego cáncer de mama.
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450
500
400
500
450
350
300
300
350 300
300
350
400
350
Índice de mortalidad por cáncer de colon
varones, 1970-1994
Relación inversa entre irradiación solar y cáncer de colon
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Garland et al., Vitamin D for Cancer Prevention: Global Perspective.
Annals of Epidemiology, 2009
Serum 25(OH)D3 (ng/ml) Serum 25(OH)D3
Correlación inversa entre los niveles de 25(OH)D3 en el suero y cáncer de colon
mortalidad incidencia
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• Causal link between Vitamin D and colorectal/bowel cancer is probable • Growing evidence, not conclusive
• Need for prospective clinical trials and large-scale observational studies
Giovannucci, E. Epidemiology of vitamin D and colorectal cancer. Anticancer Agents Med Chem., 2013
“… high consistency and strongly suggestive of a causal association, Thus, improving vitamin D
status could be potentially beneficial against colorectal cancer incidence and mortality”
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Randomized Trials on
Vitamin D and Cancer
Incidence and/or Mortality
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118-125
Available data from published randomized controlled trials are
not sufficient to draw final conclusions
Deficiencies: biased, population (post-menopausic women), duration, basal
25(OH)D3 levels, compliance, false placebos…
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• Enroll people at the lower end (VitD deficient)
• Supplement with sufficient vitamin D3 to raise their serum 25(OH)D3 level to near the upper end
• Measure 25(OH)D level at the time of enrollment and remeasure at the end of the study
• Consider other sources of vitamin D; avoid false placebos
(ideally the agent in the trial must be the only source of the agent)
• Ensure that important cofactors (Ca2+) are optimized
• Consider individual heterogeneity (VDR polymorphisms…)
• Ensure an appropriate duration of the trial
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Summary
Low serum concentrations of 25-hydroxyvitamin D (25[OH]D) have been associated with many non-skeletal disorders. However, whether low 25(OH)D is
the cause or result of ill health is not known. We did a systematic search of prospective and intervention studies that assessed the effect of 25(OH)D
concentrations on non-skeletal health outcomes in individuals aged 18 years or older. We identified 290 prospective cohort studies (279 on disease
occurrence or mortality, and 11 on cancer characteristics or survival), and 172 randomised trials of major health outcomes and of physiological parameters
related to disease risk or inflammatory status. Investigators of most prospective studies reported moderate to strong inverse associations between 25(OH)D
concentrations and cardiovascular diseases, serum lipid concentrations, inflammation, glucose metabolism disorders, weight gain, infectious diseases,
multiple sclerosis, mood disorders, declining cognitive function, impaired physical functioning, and all-cause mortality. High 25(OH)D concentrations were
not associated with a lower risk of cancer, except colorectal cancer. Results from intervention studies did not show an effect of vitamin D supplementation
on disease occurrence, including colorectal cancer. In 34 intervention studies including 2805 individuals with mean 25(OH)D concentration lower than 50
nmol/L at baseline supplementation with 50 μg per day or more did not show better results. Supplementation in elderly people (mainly women) with 20 μg
vitamin D per day seemed to slightly reduce all-cause mortality. The discrepancy between observational and intervention studies suggests that low 25(OH)D
is a marker of ill health. Inflammatory processes involved in disease occurrence and clinical course would reduce 25(OH)D, which would explain why low
vitamin D status is reported in a wide range of disorders. In elderly people, restoration of vitamin D deficits due to ageing and lifestyle changes induced by ill
health could explain why low-dose supplementation leads to slight gains in survival.
Is vitamin D deficiency cause or consequence
(“reverse causality”) of the disease status?
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Prostate Colon
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Criterios para establecer causalidad en un sistema biológico
Robert Koch (tuberculosis/bacteria, Rev Infect Dis 4, 1270-1274, 1882)
1. Grado elevado de asociación
2. Consistencia: observación repetida en numerosas poblaciones distintas
3. Especificidad: un agente, un resultado
4. Temporalidad: la exposición/causa precede al efecto
5. Gradiente biológico: relación dosis-respuesta
6. Conocer el mecanismo
7. Coherencia: compatibilidad con la historia natural y biología de la enfermedad
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R.A. Weinberg.
The Biology of Cancer, 2007/2013
CTTNB1/b-catenin
AXIN
R-Spondin (RSPO2/3)
RNF43
TCF7L2/TCF4
La alteración genética inicial en la mayoría de cánceres colorrectales es probablemente
conocida: la activación aberrante de la vía de señalización Wnt/b-catenina
Over 94% have a mutation in one or more members of the Wnt signaling pathway
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E-Cadh E-Cadh
Genes diana REPRIMIDOS
TCF
Frizzled LRP
b-Cat
Actina
Uniones
adherentes
b-Cat b-Cat APC
Axina
CKI
GSK3b
P
Proteasoma
b-Cat
Vía de señalización Wnt/b-catenina
Epitelio normal, OFF
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E-Cadh E-Cadh
TCF
Wnt
b-Cat
Actina
Target genes REPRESSED
Uniones
adherentes
Frizzled LRP
b-Cat
Axin
b-Cat b-Cat b-Cat
b-Cat
b-Cat
b-Cat
Genes diana ACTIVADOS
CKI
GSK3b
P
P
b-Cat APC
Axina
CKI
GSK3b
b-Cat APC
CKI
GSK3b
Dvl
b-Cat b-Cat
Proteasoma
b-Cat
P
Vía de señalización Wnt/b-catenina Factores Wnt, ON
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E-Cadh E-Cadh
TCF
b-Cat
Actina
Uniones
adherentes
Vía de señalización Wnt/b-catenina
b-Cat
b-Cat
Genes diana ACTIVADOS proliferación, invasividad, metástasis
b-Cat b-Cat b-Cat
b-Cat
Frizzled LRP
b-Cat APC
Axina
CKI
GSK3b
mut
Cáncer colon, ON
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1,25(OH)2D3 induce un fenotipo epitelial diferenciado y reduce la proliferación mediante:
a) la inducción de E-cadherina y b) la relocalización de b-catenina
E-cadherina
b-catenina
Control
1,25(OH)2D3 16 h
1,25(OH)2D3 48 h
Células SW480-ADH
Pálmer et al.,
J. Cell Biol., 2001
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Kremen
Arrow/
LRP5/6
Wnt
Frizzled
Wnt Wnt
Wnt
DKK-1
Wise
SFRPs WIF
Cerberus
Inhibitors of Wnt signalling
Intracellular inhibitors
Chibby, TAK/NLK, I-mfa, ICAT, HBP-1, lines, Sox3, Sox17a/b…
Via direct binding to Wnt factors
sFRPs, WIF-1, Cerberus
Via binding to components of the
Wnt receptor complex
DICKKOPF (DKK-1-4), Wise
C1q/Cs complt. complex
Carboxypeptidase E, Tiki
endocytosis
Extracellular inhibitors
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1a,25(OH)2D
3
TCF4
b-Cat
TCF4
b-Cat
b-Cat
b-Cat
b-Cat
b-Cat b-Cat
E-Cadherina
b-Cat
Genes diana
activados
Genes diana
reprimidos
1
2
TCF4
E-Cadherina
Genes diana
reprimidos
b-Cat
b-Cat
Células epiteliales
normales
Células de c. de colon
tratadas con 1a,25(OH)2D3
Células de
carcinoma de colon
APC
APC mut
1,25(OH)2D3 inhibe la vía Wnt/b-catenina en células de cáncer de colon:
Tres mecanismos
SW
48
0-A
DH
SW
48
0-A
DH
1a,25(OH)2D3 Vehiculo
DKK-1
DKK-1
3
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Snail1 induce Transición Epitelio-Mesénquima (TEM)
Células epiteliales
Células mesenquimales
(invasivas)
Snail1
Células Snail (-) Células Snail (+)
Área invasiva del tumor primario
Células tumorales
no-invasivas
Células tumorales
invasivas
Rotura de la
membrana basal
Membrana basal
Modificado de Nieto, MA, Nat Rev Mol Cell Biol 3, 155-166, 2002
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No reported:
VDR gene mutations
Epigenetic silencing
Transcriptional repression
Controversial role of several polymorphisms
Does Snail1 repress VDR expression?
exon 1A
promoter
Snail1
Human VDR gene
Three putative
Snail1 sites/E-boxes
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Control 1a,25(OH)2D3 1a,25(OH)2D3 Control
Mock Snail-HA
Snail inhibe la expresión de VDR y su inducción por vitamina D
Proteína RNA
E-cadherin
E-Cadherina
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Snail1 inhibe la acción antitumoral action del análogo de la vitamin D
EB1089/Seocalcitol en ratones xenotransplantados
Placebo
EB1089
Placebo
EB1089
Mock
Snail1-HA
}
}
Placebo
EB1089
SW480-R }
Tumor growth
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La inducción de SNAIL se correlaciona con la represión de VDR
en cáncer de colon humano
r (Spearman) = –0.47
P = 0.007
P = 0.0001 Wilcoxon test
The transcription factor SNAIL represses vitamin D receptor expression and responsiveness in human colon cancer
(n = 32) Pálmer et al. Nat. Med. 10, 117-119 (2004)
E-cadherin and vitamin D receptor regulation by Snail and ZEB-1 in colon cancer: clinicopathological correlations
(n = 114) Peña et al. Human Mol. Genet. 14, 3361-3370 (2005)
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1,25(OH)2D3
VDR
Efectos
genómicos
Efectos
no-genómicos
Snail1, Snail2
Señalización
Wnt/b-catenina
Diferenciación
Vía Wnt/b-catenina
Inhib. proliferación
Apoptosis
E-cadherina,…
p21CIP1, p27KIP1,…
Ciclina D1,…
BAX, BAK,…
BCL2, IAP,…
+
-
+
-
+
-
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La 1,25(OH)2D3 tiene efectos anti-estrogénicos en células de cáncer de mama
Vitamin D and breast cancer Inhibition of
estrogen synthesis and signaling
Krishnan AV, Swami, S, and Feldman, D
J Steroid Biochem Mol Biol, 2010
Tissue-selective regulation of aromatase
expression by Calcitriol: Implications for
Breast Cancer therapy
Krishnan AV, Swami, S, Peng, L, Wang, J,
Moreno J, and Feldman, D
Endocrinology, 2010
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J. Clin. Invest., 124, 859-870, 2014
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Clinical Breast Cancer, 2014, in press
Mayor supervivencia libre de enfermedad
no modifica surpervivencia global
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J. Clin. Oncol., 32, 3242-3248, 2014
2015, in press
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Ongoing Phase III Clinical trials on Vitamin D and
Cancer Risk or Progression/Survival
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Feldman, D., Pike, J.W. and Adams, J.S.
Vitamin D, 3rd Ed., Academic Press, 2011
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Ensayo D-Health
Australia, 25,000 people aged 64-80
5 years
60,000 U one monthly injection = 2,000 U/day
`
Placebo: 500 U/day allowed and other 100 U/day are calculated from diet
Comparison between 2,000 vs 100-600 U/day
Younger population without accumulated risk?
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Solid tumors are heterotypic: they contain neoplastic cells and also several types of stromal
cells (fibroblasts, endothelial, immune cells…) that play crucial roles in tumor progression
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Effect of 1,25(OH)2D3 on human colon normal and tumor organoids (stem cells)
Day 0 Day 1 Day 2 Day 7
Antonio Barbáchano Asun Fernández-Barral
Drs. Ramón Cantero y Damián G Olmo
Serv. Cirugía General, Hosp. Univ. La Paz and
Fund. J. Díaz, Madrid
Normal organoids
Tumor organoids
Day 4 Day 0
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Effect of 1,25(OH)2D3 on fibroblasts from normal (NF) and tumoral (CAF)
human colon biopsies
Mª Jesús Larriba Gemma Ferrer
Federico Rojo, FJD, Madrid
VDR
high epithelium,
high estroma
Global transcriptomic study 7 patients, matched NF/CAF, 2 days vitD/vehicle: 28 arrays
Ferrer-Mayorga et al., submitted
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Estudios epidemiológicos y preclínicos indican un efecto protector de la vitamina D
frente a numerosos cánceres, sobre todo el colorrectal, reduciendo el riesgo/la
incidencia y, sobre todo, la mortalidad por cáncer colorrectal y total (overall mortality)
Por todo ello, parece aconsejable EVITAR LA DEFICIENCIA y continuar los
estudios epidemiológicos y clínicos prospectivos mejorando su diseño
Prevención
Combinación con terapias
Selección y seguimiento de pacientes, dosis adecuadas, duración…
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Antonio García de Herreros, IMIM-UPF, Barcelona
Carlos López-Otín, Univ. Oviedo Miguel Lafarga, Univ. Cantabria, Santander
Félix Bonilla, Hosp. Univ. Puerta de Hierro, Madrid
Collaborators
José María Rojas, ISCIII, Madrid
Eva Hernando, New York Univ., USA
Francisco X. Real, CNIO, Madrid
Federico Rojo, Fund. Jiménez Díaz, Madrid
Héctor G. Pálmer, VHIO, Barcelona
David Lyden/Héctor Peinado, Cornell Univ., NY, USA/CNIO
Ramón Cantero/Damián G.Olmo, HU La Paz/FJD, Madrid Ignacio Casal, CIB, CSIC, Madrid
Eduard Batlle, IRB, Barcelona
Javier de las Rivas, CIC, Salamanca
Funding
COLOMICS2