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HNF1B variants associate with promoter methylation and regulate gene networks activated in prostate and ovarian cancer.

ABSTRACT: Two independent regions within HNF1B are consistently identified in prostate and ovarian cancer genome-wide association studies (GWAS); their functional roles are unclear. We link prostate cancer (PC) risk SNPs rs11649743 and rs3760511 with elevated HNF1B gene expression and allele-specific epigenetic silencing, and outline a mechanism by which common risk variants could effect functional changes that increase disease risk: functional assays suggest that HNF1B is a pro-differentiation factor that suppresses epithelial-to-mesenchymal transition (EMT) in unmethylated, healthy tissues. This tumor-suppressor activity is lost when HNF1B is silenced by promoter methylation in the progression to PC. Epigenetic inactivation of HNF1B in ovarian cancer also associates with known risk SNPs, with a similar impact on EMT. This represents one of the first comprehensive studies into the pleiotropic role of a GWAS-associated transcription factor across distinct cancer types, and is the first to describe a conserved role for a multi-cancer genetic risk factor.

SUBMITTER: Ross-Adams H

PROVIDER: S-EPMC5342698 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature

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HNF1B variants associate with promoter methylation and regulate gene networks activated in prostate and ovarian cancer.

Ross-Adams Helen H Ball Stephen S Lawrenson Kate K Halim Silvia S Russell Roslin R Wells Claire C Strand Siri H SH Ørntoft Torben F TF Larson Melissa M Armasu Sebastian S Massie Charles E CE Asim Mohammad M Mortensen Martin M MM Borre Michael M Woodfine Kathryn K Warren Anne Y AY Lamb Alastair D AD Kay Jonathan J Whitaker Hayley H Ramos-Montoya Antonio A Murrell Adele A Sørensen Karina D KD Fridley Brooke L BL Goode Ellen L EL Gayther Simon A SA Masters John J Neal David E DE Mills Ian G IG

Oncotarget 20161101 46

Two independent regions within HNF1B are consistently identified in prostate and ovarian cancer genome-wide association studies (GWAS); their functional roles are unclear. We link prostate cancer (PC) risk SNPs rs11649743 and rs3760511 with elevated HNF1B gene expression and allele-specific epigenetic silencing, and outline a mechanism by which common risk variants could effect functional changes that increase disease risk: functional assays suggest that HNF1B is a pro-differentiation factor tha ...[more]

PMID: 27732966

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Project description:INTRODUCTION: The objective of this study was to investigate the relationship of the IL-6 promoter variants G-597A, G-572C and G-174C (rs1800797, rs1800796 and rs1800795, respectively), which have been shown to affect both the transcription and secretion of IL-6, to symptomatic distal interphalangeal (DIP) osteoarthritis (OA). METHODS: A total of 535 women aged 45 to 63 years were included. Radiographs of both hands were taken and each DIP joint was evaluated (grade 0 to 4) for the presence of OA. Information on symptoms (pain, tenderness) in each joint was collected by using a self-administered questionnaire. Symptomatic DIP OA was defined by the presence of both radiographic findings of grade 2 or more and symptoms in at least two DIP joints, and symmetrical DIP OA by the presence of radiographic findings of grade 2 or more in at least one symmetrical pair of DIP joints. Common polymorphic loci in the IL-6 gene were amplified and the promoter haplotypes were reconstructed from genotype data with the PHASE program. Logistic regression analysis was used to examine the association between the IL-6 genotypes/diplotypes and the DIP OA outcome. RESULTS: The G alleles of two promoter single nucleotide polymorphisms (SNPs) G-597A and G-174C were more common among the subjects with symptomatic DIP OA than among those with no disease (P = 0.020 and 0.024, corrected for multiple testing). In addition, the carriage of at least one G allele in these positions increased the risk of disease (P = 0.006 and P = 0.008, respectively). Carrying a haplotype with the G allele in all three promoter SNPs increased the risk of symptomatic DIP OA more than fourfold (odds ratio (OR) 4.45, P = 0.001). Carriage of the G-G diplotype indicated an increased risk of both symmetrical DIP OA (OR 1.52, 95% confidence interval 1.01 to 2.28) and symptomatic DIP OA (OR 3.67, 95% confidence interval 1.50 to 9.00). CONCLUSION: The present study showed that the presence of G alleles at common IL-6 polymorphic promoter loci was associated with the more severe DIP OA outcomes, symmetrical and symptomatic.

Dataset Information

HNF1B variants associate with promoter methylation and regulate gene networks activated in prostate and ovarian cancer.

Publications

HNF1B variants associate with promoter methylation and regulate gene networks activated in prostate and ovarian cancer.

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