Cited by 46Genomics and Chromatin DynamicsEndometriosis Research and TreatmentGenetic Associations and Epidemiology

Allelic Imbalance in Regulation of ANRIL through Chromatin Interaction at 9p21 Endometriosis Risk Locus

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Nakaoka, Hirofumi, Gurumurthy, Aishwarya, Hayano, Takahide, Ahmadloo, Somayeh, Omer, Waleed H, Yoshihara, Kosuke, Yamamoto, Akihito, Kurose, Keisuke +4 more·2016·PLOS Genetics

Abstract

Genome-wide association studies (GWASs) have discovered numerous single nucleotide polymorphisms (SNPs) associated with human complex disorders. However, functional characterization of the disease-associated SNPs remains a formidable challenge. Here we explored regulatory mechanism of a SNP on chromosome 9p21 associated with endometriosis by leveraging "allele-specific" functional genomic approaches. By re-sequencing 1.29 Mb of 9p21 region and scrutinizing DNase-seq data from the ENCODE project, we prioritized rs17761446 as a candidate functional variant that was in perfect linkage disequilibrium with the original GWAS SNP (rs10965235) and located on DNase I hypersensitive site. Chromosome conformation capture followed by high-throughput sequencing revealed that the protective G allele of rs17761446 exerted stronger chromatin interaction with ANRIL promoter. We demonstrated that the protective allele exhibited preferential binding affinities to TCF7L2 and EP300 by bioinformatics and chromatin immunoprecipitation (ChIP) analyses. ChIP assays for histone H3 lysine 27 acetylation and RNA polymerase II reinforced the enhancer activity of the SNP site. The allele specific expression analysis for eutopic endometrial tissues and endometrial carcinoma cell lines showed that rs17761446 was a cis-regulatory variant where G allele was associated with increased ANRIL expression. Our work illuminates the allelic imbalances in a series of transcriptional regulation from factor binding to gene expression mediated by chromatin interaction underlie the molecular mechanism of 9p21 endometriosis risk locus. Functional genomics on common disease will unlock functional aspect of genotype-phenotype correlations in the post-GWAS stage.

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Authors
Nakaoka, H., Gurumurthy, A., Hayano, T., Ahmadloo, S., Omer, W. H., Yoshihara, K., Yamamoto, A., Kurose, K., Enomoto, T., Akira, S., Hosomichi, K., & Inoue, I.
Affiliations
  • National Institute of Genetics (JP)
  • Niigata University (JP)
  • Nippon Medical School (JP)
  • Kanazawa University (JP)
Corresponding author
Inoue, Ituro
Venue
PLOS Genetics
Published
2016-04-07
Volume
12
Issue
4
Pages
e1005893
ISSN
  • 1553-7390 (ISSN-L)
  • 1553-7404
OpenAlex
W2326815424
Cited by
46
References
68
Citations by year
2026: 3 · 2025: 2 · 2023: 1 · 2022: 5 · 2021: 4 · 2020: 2 · 2019: 9 · 2018: 9 · 2017: 10 · 2016: 1
FWCI
5.03
Type
journal article
Language
en
Open access
Locations
  • PLoS Genetics (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
Japan Society for the Promotion of Science (15K15598, 26640126, 15H02373)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Health Sciences › Medicine › Reproductive Medicine › Endometriosis Research and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
Keywords
endometriosis, 9p21, ANRIL, allelic imbalance, cis-regulatory variation, enhancer activity, TCF7L2, EP300, H3K27 acetylation, RNA polymerase II, DNase I hypersensitive sites, chromatin looping, allele-specific expression, endometrial cancer, genotype-phenotype correlation
MeSH terms
Chromatin, Chromosomes, Human, Pair 9, Endometriosis, Female, Haplotypes, Humans, Promoter Regions, Genetic, Polymorphism, Single Nucleotide, Allelic Imbalance, Cell Line, Tumor, E1A-Associated p300 Protein, Genome-Wide Association Study, Transcription Factor 7-Like 2 Protein, RNA, Long Noncoding

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