Abstract:
:Genome-wide association studies (GWAS) have identified several common loci contributing to non-obstructive azoospermia (NOA). However, a substantial fraction of NOA heritability remains undefined, especially those low-frequency [defined here as having a minor allele frequency (MAF) between 0.5 and 5%] and rare (MAF below 0.5%) variants. Here, we performed a 3-stage exome-wide association study in Han Chinese men to evaluate the role of low-frequency or rare germline variants in NOA development. The discovery stage included 962 NOA cases and 1348 healthy male controls genotyped by exome chips and was followed by a 2-stage replication with an additional 2168 cases and 5248 controls. We identified three low-frequency variants located at 6p22.2 (rs2298090 in HIST1H1E encoding p.Lys152Arg: OR = 0.30, P = 2.40 × 10(-16)) and 6p21.33 (rs200847762 in FKBPL encoding p.Pro137Leu: OR = 0.11, P = 3.77 × 10(-16); rs11754464 in MSH5: OR = 1.78, P = 3.71 × 10(-7)) associated with NOA risk after Bonferroni correction. In summary, we report an instance of newly identified signals for NOA risk in genes previously undetected through GWAS on 6p22.2-6p21.33 in a Chinese population and highlight the role of low-frequency variants with a large effect in the process of spermatogenesis.
journal_name
Hum Mol Genetjournal_title
Human molecular geneticsauthors
Ni B,Lin Y,Sun L,Zhu M,Li Z,Wang H,Yu J,Guo X,Zuo X,Dong J,Xia Y,Wen Y,Wu H,Li H,Zhu Y,Ping P,Chen X,Dai J,Jiang Y,Xu P,Du Q,Yao B,Weng N,Lu H,Wang Z,Zhu X,Yang X,Xiong C,Ma H,Jin G,Xu J,Wangdoi
10.1093/hmg/ddv257subject
Has Abstractpub_date
2015-10-01 00:00:00pages
5628-36issue
19eissn
0964-6906issn
1460-2083pii
ddv257journal_volume
24pub_type
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