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A genome-wide association study identifies FSHR rs2300441 associated with follicle-stimulating hormone levels |
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| Authors: | Jinting Yan Ye Tian Xingjian Gao Linlin Cui Yunna Ning Yongzhi Cao Yan Chen Fuduan Peng Li You Fan Liu Han Zhao |
| Affiliation: | 1. CAS Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China;2. Center for Reproductive Medicine, Shandong University, Jinan, China National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, China The Key Laboratory for Reproductive Endocrinology, Shandong University, Ministry of Education, Jinan, China Department of Gynecology and Obstetrics, Tianjin Medical University General Hospital, Tianjin, China;3. Center for Reproductive Medicine, Shandong University, Jinan, China National Research Center for Assisted Reproductive Technology and Reproductive Genetics, Jinan, China The Key Laboratory for Reproductive Endocrinology, Shandong University, Ministry of Education, Jinan, China;4. Center for Reproductive Medicine, Shandong University, Jinan, China |
| Abstract: | Follicle-stimulating hormone (FSH) and luteinizing hormone (LH) play critical roles in female reproduction, while the underlying genetic basis is poorly understood. Genome-wide association studies (GWASs) of FSH and LH levels were conducted in 2590 Chinese females including 1882 polycystic ovary syndrome (PCOS) cases and 708 controls. GWAS for FSH level identified multiple variants at FSHR showing genome-wide significance with the top variant (rs2300441) located in the intron of FSHR. The A allele of rs2300441 led to a reduced level of FSH in the PCOS group (β = −.43, P = 6.70 × 10−14) as well as in the control group (β = −.35, P = 6.52 × 10−4). In the combined sample, this association was enhanced after adjusting for the PCOS status (before: β = −.38, P = 1.77 × 10−13; after: β = −.42, P = 3.33 × 10−16), suggesting the genetic effect is independent of the PCOS status. The rs2300441 explained sevenfold higher proportion of the FSH variance than the total variance explained by the two previously reported FSHR missense variants (rs2300441 R2 = 1.40% vs rs6166 R2 = 0.17%, rs6165 R2 = 0.03%). GWAS for LH did not identify any genome-wide significant associations. In conclusion, we identified genome-wide significant association between variants in FSHR and circulating FSH first, with the top associated variant rs2300441 might be a primary contributor at the population level. |
| Keywords: | FSH FSHR genetic association GWAS LH |