中国神经再生研究(英文版) ›› 2025, Vol. 20 ›› Issue (1): 265-276.doi: 10.4103/1673-5374.391302

• 原著:退行性病与再生 • 上一篇    下一篇

ATP1A1基因突变致2型腓骨肌萎缩和难治性癫痫发作的果蝇模型

  

  • 出版日期:2025-01-15 发布日期:2025-01-15

Drosophila models used to simulate human ATP1A1 gene mutations that cause Charcot-Marie-Tooth type 2 disease and refractory seizures

Yao Yuan1, #, Lingqi Yu1, #, Xudong Zhuang2, 3, #, Dongjing Wen1, Jin He4, Jingmei Hong4, Jiayu Xie1, Shengan Ling1, Xiaoyue Du1, Wenfeng Chen1, *, Xinrui Wang2, 3, *   

  1. 1Institute of Life Sciences, College of Biological Science and Engineering, Fuzhou University, Fuzhou, Fujian Province, China; 2NHC Key Laboratory of Technical Evaluation of Fertility Regulation for Non-human Primate (Fujian Maternity and Child Health Hospital), Fuzhou, Fujian Province, China; 3Medical Research Center, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian Province, China; 4Department of Neurology and Institute of Neurology of The First Affiliated Hospital, Institute of Neuroscience, and Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, Fuzhou, Fujian Province, China
  • Online:2025-01-15 Published:2025-01-15
  • Contact: Wenfeng Chen, PhD, chenwenfeng@fzu.edu.cn; Xinrui Wang, PhD wanxiru@sjtu.edu.cn.
  • Supported by:
    This study was supported by the Natural Science Foundation of Fujian Province, No. 2020J02027; the National Natural Science Foundation of China, No. 31970461; and the Foundation of NHC Key Laboratory of Technical Evaluation of Fertility Regulation for Non-human Primate, Fujian Maternity and Child Health Hospital, No. 2022-NHP-05 (all to WC).

摘要:

人Na+/K+-ATP 酶亚基ATP1A1中的某些氨基酸突变会导致2型腓骨肌萎缩和难治性癫痫发作。为研究Na+/K+-ATP 酶在这些疾病中的作用,实验拟编辑Atpα(人ATP1A1的果蝇同源物)的基因以建立果蝇模型。首先使用CRISPR/Cas9基因组编辑技术位于人ATP1A1螺旋连接区内的I592T,A597T,P600T和D601F对应的突变同时引入果蝇Atpα基因中,生成AtpαTTTF果蝇;并采用相同的策略来生成单点突变的果蝇(AtpαI571T,AtpαA576T,AtpαP579T和AtpαD580F)。另外,还获得了1种缺失突变等位基因(Atpαmut)。在这些等位基因中,存在2种由纯合维持的等位基因(AtpαI571T和AtpαP579T),另4种(AtpαTTTF/+,AtpαA576T/+,AtpαD580F/+和Atpαmut/+)只能与Atpαmut形成杂合子维持。进一步观察发现,携带这些突变Atpα等位基因在果蝇中表现出不同的表型,其中AtpαTTTF杂合突变的果蝇具有运动性能障碍和寿命缩短的表现,且也存在癫痫发作和异常神经元形态。实验构建的果蝇模型将为研究钠钾泵功能和调节提供新平台。

https://orcid.org/0000-0001-5259-7214 (Wenfeng Chen); https://orcid.org/0000-0002-7383-9128 (Xinrui Wang)

关键词: Atpα, ATP1A1, Na+/K+-ATP 酶, 钠钾泵, 2型腓骨肌萎缩, CRISPR/Cas9, 点突变, 同源定向修复, 爆炸性麻痹, 癫痫发作

Abstract: Certain amino acids changes in the human Na+/K+-ATPase pump, ATPase Na+/K+ transporting subunit alpha 1 (ATP1A1), cause Charcot-Marie-Tooth disease type 2 (CMT2) disease and refractory seizures. To develop in vivo models to study the role of Na+/K+-ATPase in these diseases, we modified the Drosophila gene homolog, Atpα, to mimic the human ATP1A1 gene mutations that cause CMT2. Mutations located within the helical linker region of human ATP1A1 (I592T, A597T, P600T, and D601F) were simultaneously introduced into endogenous Drosophila Atpα by CRISPR/Cas9-mediated genome editing, generating the AtpαTTTF model. In addition, the same strategy was used to generate the corresponding single point mutations in flies (AtpαI571T, AtpαA576T, AtpαP579T, and AtpαD580F). Moreover, a deletion mutation (Atpαmut) that causes premature termination of translation was generated as a positive control. Of these alleles, we found two that could be maintained as homozygotes (AtpαI571T and AtpαP579T). Three alleles (AtpαA576T, AtpαP579 and AtpαD580F) can form heterozygotes with the Atpαmut allele. We found that the Atpα allele carrying these CMT2-associated mutations showed differential phenotypes in Drosophila. Flies heterozygous for AtpαTTTF mutations have motor performance defects, a reduced lifespan, seizures, and an abnormal neuronal morphology. These Drosophila models will provide a new platform for studying the function and regulation of the sodium-potassium pump.

Key words: ATP1A1, Atpα, bang-sensitive paralysis, Charcot-Marie-Tooth disease type 2, CRISPR/Cas9, homology-directed repair, Na+/K+-ATPase, point mutation, seizures, sodium pump