轴丝动力蛋白重链10缺乏导致人类和小鼠的原发性纤毛运动障碍。
Dynein axonemal heavy chain 10 deficiency causes primary ciliary dyskinesia in humans and mice.
作者信息
Wang Rongchun, Yang Danhui, Tu Chaofeng, Lei Cheng, Ding Shuizi, Guo Ting, Wang Lin, Liu Ying, Lu Chenyang, Yang Binyi, Ouyang Shi, Gong Ke, Tan Zhiping, Deng Yun, Tan Yueqiu, Qing Jie, Luo Hong
机构信息
Department of Pulmonary and Critical Care Medicine, The Second Xiangya Hospital of Central South University, Changsha, 410011, China.
Research Unit of Respiratory Disease, Central South University, Changsha, 410011, China.
出版信息
Front Med. 2023 Oct;17(5):957-971. doi: 10.1007/s11684-023-0988-8. Epub 2023 Jun 13.
Primary ciliary dyskinesia (PCD) is a congenital, motile ciliopathy with pleiotropic symptoms. Although nearly 50 causative genes have been identified, they only account for approximately 70% of definitive PCD cases. Dynein axonemal heavy chain 10 (DNAH10) encodes a subunit of the inner arm dynein heavy chain in motile cilia and sperm flagella. Based on the common axoneme structure of motile cilia and sperm flagella, DNAH10 variants are likely to cause PCD. Using exome sequencing, we identified a novel DNAH10 homozygous variant (c.589C > T, p.R197W) in a patient with PCD from a consanguineous family. The patient manifested sinusitis, bronchiectasis, situs inversus, and asthenoteratozoospermia. Immunostaining analysis showed the absence of DNAH10 and DNALI1 in the respiratory cilia, and transmission electron microscopy revealed strikingly disordered axoneme 9+2 architecture and inner dynein arm defects in the respiratory cilia and sperm flagella. Subsequently, animal models of Dnah10-knockin mice harboring missense variants and Dnah10-knockout mice recapitulated the phenotypes of PCD, including chronic respiratory infection, male infertility, and hydrocephalus. To the best of our knowledge, this study is the first to report DNAH10 deficiency related to PCD in human and mouse models, which suggests that DNAH10 recessive mutation is causative of PCD.
原发性纤毛运动障碍(PCD)是一种具有多效性症状的先天性运动性纤毛病。尽管已鉴定出近50个致病基因,但它们仅占确诊PCD病例的约70%。动力蛋白轴丝重链10(DNAH10)编码运动性纤毛和精子鞭毛中内臂动力蛋白重链的一个亚基。基于运动性纤毛和精子鞭毛常见的轴丝结构,DNAH10变异可能导致PCD。通过外显子组测序,我们在一个近亲家庭的PCD患者中鉴定出一种新的DNAH10纯合变异(c.589C>T,p.R197W)。该患者表现为鼻窦炎、支气管扩张、内脏反位和弱畸精子症。免疫染色分析显示呼吸道纤毛中不存在DNAH10和DNALI1,透射电子显微镜显示呼吸道纤毛和精子鞭毛的轴丝9+2结构明显紊乱以及内动力蛋白臂缺陷。随后,携带错义变异的Dnah10基因敲入小鼠和Dnah10基因敲除小鼠的动物模型重现了PCD的表型,包括慢性呼吸道感染、男性不育和脑积水。据我们所知,本研究首次在人和小鼠模型中报道了与PCD相关的DNAH10缺陷,这表明DNAH10隐性突变是PCD的病因。