Dairy products, polymorphisms in the vitamin D receptor gene and colorectal adenoma recurrence.
Int J Cancer
; 123(3): 586-93, 2008 Aug 01.
Article
em En
| MEDLINE
| ID: mdl-18470879
ABSTRACT
Vitamin D receptor (VDR) activation inhibits proliferation and angiogenesis in the colorectal epithelium, and inhibits metastasis of colorectal tumors. Polymorphisms in the VDR gene alter receptor cellular levels and functioning, and may confer altered susceptibility to colorectal neoplasia. We aimed to investigate the influence of VDR polymorphisms and dietary factors impacting on vitamin D metabolism on colorectal adenoma (CRA) recurrence. Data on dietary intakes of calcium, vitamin D and dairy products were collected from 853 participants in the United Kingdom Colorectal Adenoma Prevention trial, a randomized trial of aspirin and folate for CRA recurrence prevention. The VDR Cdx2, FokI, BsmI, ApaI and TaqI polymorphisms were genotyped in 546 participants with available DNA, and gene-diet interaction analyses performed in 480. Dairy product intake was inversely related to CRA recurrence risk independent of calcium and vitamin D [relative risk (RR) = 0.64; 95% confidence intervals (CIs) 0.47-0.88, for subjects in the highest compared to lowest intake tertile, p(trend) = 0.005]. Milk accounted for 60% of dairy product intake, and on analysis of milk and nonmilk dairy products separately recurrence risk in individuals in the highest tertile of milk intake was half that of lowest tertile individuals (RR = 0.52; 95% CI 0.38-0.72, p(trend) = 3.2 x 10(-5)), whereas nonmilk dairy products did not influence recurrence. VDR polymorphism genotypes and haplotypes did not directly alter recurrence risk, but the reduction in risk associated with high dairy product intake was confined to individuals with ApaI aA/AA genotype (p(interaction) = 0.02). These findings indicate dairy products, and in particular milk, have chemopreventive activity against CRA recurrence.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polimorfismo Genético
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Fatores de Transcrição
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Neoplasias Colorretais
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Adenoma
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Receptores de Calcitriol
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Laticínios
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Recidiva Local de Neoplasia
Tipo de estudo:
Clinical_trials
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Diagnostic_studies
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Etiology_studies
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Risk_factors_studies
Limite:
Adult
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Aged
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Animals
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Female
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Humans
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Male
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Middle aged
País/Região como assunto:
Europa
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article