Absence of murine CFAP61 causes male infertility due to multiple morphological abnormalities of the flagella  

CFAP61基因敲除雄鼠出现精子鞭毛多发性形态异常引起的不育

作　　者：Tao Huang Yingying Yin Chao Liu Mengjing Li Xiaochen Yu Xiuge Wang Haobo Zhang Tahir Muhammad Fei Gao Wei Li Zi-Jiang Chen Hongbin Liu Jinlong Ma 黄涛;尹莹莹;刘超;李孟静;于小宸;王秀革;张浩波;Tahir Muhammad;高飞;李卫;陈子江;刘洪彬;马金龙(Center for Reproductive Medicine,Cheeloo College of Medicine,Shandong University,Jinan 250012,China;National Research Center for Assisted Reproductive Technology and Reproductive Genetics,Shandong University,Jinan 250012,China;Key Laboratory of Reproductive Endocrinology of Ministry of Education,Shandong University,Jinan 250012,China;Shandong Provincial Clinical Medicine Research Center for Reproductive Health,Shandong University,Jinan 250012,China;State Key Laboratory of Stem Cell and Reproductive Biology,Institute of Zoology,Chinese Academy of Sciences,Beijing 100101,China;Center for Reproductive Medicine,Ren Ji Hospital,School of Medicine,Shanghai Jiao Tong University,Shanghai 200000,China;Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics,Shanghai 200000,China)

机构地区：[1]Center for Reproductive Medicine,Cheeloo College of Medicine,Shandong University,Jinan 250012,China [2]National Research Center for Assisted Reproductive Technology and Reproductive Genetics,Shandong University,Jinan 250012,China [3]Key Laboratory of Reproductive Endocrinology of Ministry of Education,Shandong University,Jinan 250012,China [4]Shandong Provincial Clinical Medicine Research Center for Reproductive Health,Shandong University,Jinan 250012,China [5]State Key Laboratory of Stem Cell and Reproductive Biology,Institute of Zoology,Chinese Academy of Sciences,Beijing 100101,China [6]Center for Reproductive Medicine,Ren Ji Hospital,School of Medicine,Shanghai Jiao Tong University,Shanghai 200000,China [7]Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics,Shanghai 200000,China

出　　处：《Science Bulletin》2020年第10期854-864,M0004,共12页科学通报（英文版）

基　　金：We thank Zhang Jie for her assistance in confocal analysis(Advanced Medical Research Institute,Shandong University).This work was supported by the National Key Research and Development Programs of China(2018YFC1003400);the Young Scholars Program of Shandong University(2016WLJH50);the Natural Science Foundation of Shandong Province(ZR2017MH049).

摘　　要：Impaired flagellar development and impaired motility of sperm is a cause of infertility in males. Several genes, including those of the AKAP, CCDC, CFAP, and DNAH families, among others, are involved in the‘‘multiple morphological abnormalities of the flagella"(MMAF) phenotype;these are the most common causes of male infertility. The Cilia-and flagella-associated protein(CFAP) family includes six members reported to cause MMAF phenotypes: CFAP43, CFAP44, CFAP69, CFAP65, CFAP70, and CFAP251. Here, we found that cilia-and flagella-associated protein 61(Cfap61) is highly expressed specifically in murine testes and show that the Cfap61-knockout male mice demonstrate MMAF phenotype, including sperm with short, coiled, and irregular flagella. Deletion of Cfap61 resulted in severe morphological and behavior abnormalities in sperm, reduced total sperm counts, impaired sperm motility, and led to male infertility.Notably, absence of Cfap61 impaired sperm flagella ultrastructural abnormalities on account of numerous distortions in multiple flagellum components. Immunostaining experiments in wild-type mice and healthy adult humans indicated that Cfap61 is initially localized at the neck of sperm, where it potentially functions in flagellum formation, and is later localized to the midpiece of the sperm. Thus, our study provides compelling evidence that dysregulation of Cfap61 affects sperm flagellum development and induces male infertility in mice. Further investigations of the CFAP61 gene in humans alongside clinical evidence showing MMAF phenotype in humans should contribute to our understanding of developmental processes underlying sperm flagellum formation and the pathogenic mechanisms that cause male infertility.不育症困扰世界范围内约10%~15%的育龄夫妇.男性不育常由少精、弱精、畸形精子症等引起,表现为精子数量减少、精子运动能力降低、精子鞭毛多发性形态异常(MMAF)以及这些多重缺陷的组合.研究发现AKAP、CCDC、CFAP和DNAH等基因家族与精子鞭毛多发性形态异常相关.然而已知的MMAF基因只能解释大约60%的MMAF病例,因此MMAF存在遗传异质性,仍有未知的MMAF致病相关基因需要挖掘.本文通过构建睾丸中特异表达的CFAP61基因的敲除小鼠,发现雄鼠不育、精子活力下降和MMAF,提示CFAP61基因可能参与人类男性少弱畸精子症或其他纤毛疾病导致男性不育.

关 键 词：Multiple morphological abnormalities of the flagella(MMAF) Male infertility Cfap61 Flagellum development 

分 类 号：R698.2[医药卫生—泌尿科学]