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A Trans-Ethnic Genome-Wide Association Study of Uterine Fibroids.

TitleA Trans-Ethnic Genome-Wide Association Study of Uterine Fibroids.
Publication TypeJournal Article
Year of Publication2019
AuthorsEdwards TL, Giri A, Hellwege JN, Hartmann KE, Stewart EA, Jeff JM, Bray MJ, Pendergrass SA, Torstenson ES, Keaton JM, Jones SH, Gogoi RP, Kuivaniemi H, Jackson KL, Kho AN, Kullo IJ, McCarty CA, Im HKyung, Pacheco JA, Pathak J, Williams MS, Tromp G, Kenny EE, Peissig PL, Denny JC, Roden DM, Edwards DRVelez
JournalFront Genet
Volume10
Pagination511
Date Published2019
ISSN1664-8021
Abstract

Uterine fibroids affect up to 77% of women by menopause and account for up to $34 billion in healthcare costs each year. Although fibroid risk is heritable, genetic risk for fibroids is not well understood. We conducted a two-stage case-control meta-analysis of genetic variants in European and African ancestry women with and without fibroids classified by a previously published algorithm requiring pelvic imaging or confirmed diagnosis. Women from seven electronic Medical Records and Genomics (eMERGE) network sites (3,704 imaging-confirmed cases and 5,591 imaging-confirmed controls) and women of African and European ancestry from UK Biobank (UKB, 5,772 cases and 61,457 controls) were included in the discovery genome-wide association study (GWAS) meta-analysis. Variants showing evidence of association in Stage I GWAS ( < 1 × 10) were targeted in an independent replication sample of African and European ancestry individuals from the UKB (Stage II) (12,358 cases and 138,477 controls). Logistic regression models were fit with genetic markers imputed to a 1000 Genomes reference and adjusted for principal components for each race- and site-specific dataset, followed by fixed-effects meta-analysis. Final analysis with 21,804 cases and 205,525 controls identified 326 genome-wide significant variants in 11 loci, with three novel loci at chromosome 1q24 (sentinel-SNP rs14361789; = 4.7 × 10), chromosome 16q12.1 (sentinel-SNP rs4785384; = 1.5 × 10) and chromosome 20q13.1 (sentinel-SNP rs6094982; = 2.6 × 10). Our statistically significant findings further support previously reported loci including SNPs near , and /. We report evidence of ancestry-specific findings for sentinel-SNP rs10917151 in the / locus ( = 1.76 × 10). Ancestry-specific effect-estimates for rs10917151 were in opposite directions (P-Het-between-groups = 0.04) for predominantly African (OR = 0.84) and predominantly European women (OR = 1.16). Genetically-predicted gene expression of several genes including in vagina ( = 4.6 × 10), in esophageal mucosa ( = 8.7 × 10), in multiple tissues including subcutaneous adipose tissue ( = 3.3 × 10), and in skeletal muscle tissue ( = 5.8 × 10) were associated with fibroids. The finding for was supported by SNP-based summary Mendelian randomization analysis. Our study suggests that fibroid risk variants act through regulatory mechanisms affecting gene expression and are comprised of alleles that are both ancestry-specific and shared across continental ancestries.

DOI10.3389/fgene.2019.00511
Alternate JournalFront Genet
PubMed ID31249589
PubMed Central IDPMC6582231
Grant ListS10 OD018522 / OD / NIH HHS / United States
Division: 
Health Informatics
Category: 
Faculty Publication