期刊
AMERICAN JOURNAL OF HUMAN GENETICS
卷 107, 期 1, 页码 15-23出版社
CELL PRESS
DOI: 10.1016/j.ajhg.2020.05.001
关键词
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资金
- National Key Research and Development Program of China [2018YFC1003800, 2017YFC1001500, 2016YFC1000600]
- National Natural Science Foundation of China [81725006, 81822019, 81771581, 81571501, 81971450, 81971382]
- Shanghai Municipal Science and Technology Major Project [2017SHZDZX01]
- Shanghai Rising-Star Program [17QA1400200]
- Natural Science Foundation of Shanghai [17ZR1401900]
- Capacity Building Planning Program for Shanghai Women and Children's Health Service
- Collaborative Innovation Center Project Construction for Shanghai Women and Children's Health
- Foundation of Shanghai Health and Family Planning Commission [20154Y0162]
- Chinese Academy of Sciences [FIRMC200507]
- Strategic Collaborative Research Program of the Ferring Institute of Reproductive Medicine, Ferring Pharmaceuticals
Normal oocyte meiosis is a prerequisite for successful human reproduction, and abnormalities in the process will result in infertility. In 2016, we identified mutations in TUBB8 as responsible for human oocyte meiotic arrest. However, the underlying genetic factors for most affected individuals remain unknown. TRIP13, encoding an AAA-ATPase, is a key component of the spindle assembly checkpoint, and recurrent homozygous nonsense variants and a splicing variant in TRIP13 are reported to cause Wilms tumors in children. In this study, we identified homozygous and compound heterozygous missense pathogenic variants in TRIP13 responsible for female infertility mainly characterized by oocyte meiotic arrest in five individuals from four independent families. Individuals from three families suffered from oocyte maturation arrest, whereas the individual from the fourth family had abnormal zygote cleavage. All displayed only the infertility phenotype without Wilms tumors or any other abnormalities. In vitro and in vivo studies showed that the identified variants reduced the protein abundance of TRIP13 and caused its downstream molecule, HORMAD2, to accumulate in HeLa cells and in proband-derived lymphoblastoid cells. The chromosome mis-segregation assay showed that variants did not have any effects on mitosis. Injecting TRIP13 cRNA into oocytes from one affected individual was able to rescue the phenotype, which has implications for future therapeutic treatments. This study reports pathogenic variants in TRIP13 responsible for oocyte meiotic arrest, and it highlights the pivotal but different roles of TRIP13 in meiosis and mitosis. These findings also indicate that different dosage effects of mutant TRIP13 might result in two distinct human diseases.
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