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Title: Characterizing the genetic basis of methylome diversity in histologically normal human lung tissue.
Authors: Shi J,  Marconett CN,  Duan J,  Hyland PL,  Li P,  Wang Z,  Wheeler W,  Zhou B,  Campan M,  Lee DS,  Huang J,  Zhou W,  Triche T,  Amundadottir L,  Warner A,  Hutchinson A,  Chen PH,  Chung BS,  Pesatori AC,  Consonni D,  Bertazzi PA,  Bergen AW,  Freedman M,  Siegmund KD,  Berman BP,  Borok Z,  Chatterjee N,  Tucker MA,  Caporaso NE,  Chanock SJ,  Laird-Offringa IA,  Landi MT
Journal: Nat Commun
Date: 2014
Branches: BB, CGR, GEB, HGP, LTG, OD, OEEB
PubMed ID: 24572595
PMC ID: PMC3982882
Abstract: The genetic regulation of the human epigenome is not fully appreciated. Here we describe the effects of genetic variants on the DNA methylome in human lung based on methylation-quantitative trait loci (meQTL) analyses. We report 34,304 cis- and 585 trans-meQTLs, a genetic-epigenetic interaction of surprising magnitude, including a regulatory hotspot. These findings are replicated in both breast and kidney tissues and show distinct patterns: cis-meQTLs mostly localize to CpG sites outside of genes, promoters and CpG islands (CGIs), while trans-meQTLs are over-represented in promoter CGIs. meQTL SNPs are enriched in CTCF-binding sites, DNaseI hypersensitivity regions and histone marks. Importantly, four of the five established lung cancer risk loci in European ancestry are cis-meQTLs and, in aggregate, cis-meQTLs are enriched for lung cancer risk in a genome-wide analysis of 11,587 subjects. Thus, inherited genetic variation may affect lung carcinogenesis by regulating the human methylome.