Identification of a novel splicing variant of thyroid hormone receptor interaction protein 13 (TRIP13) in female infertility characterized by oocyte maturation arrest

• Published in: Journal of assisted reproduction and genetics 2024-10, Vol.41 (10), p.2777-2785
• Main Authors: Chen, Jia, Liu, Yuxin, Wu, Xingwu, Zhang, Yiwei, Huang, Wen, Han, Wenbo, Chen, Ge, Xu, Qiang, Chen, Houyang, Wu, Qiongfang, Wang, Jiawei, Huang, Jialyu
• Format: Article
• Language: English
• Subjects: Adult; Epstein-Barr virus; Exome Sequencing; Female; Females; Gene expression; Genetic factors; Genetics; Gynecology; Human Genetics; Humans; Infertility; Infertility, Female - genetics; Infertility, Female - pathology; Maturation; Medicine; Medicine & Public Health; Meiosis; Meiosis - genetics; Mutation - genetics; Oocytes; Oocytes - growth & development; Oocytes - metabolism; Oogenesis - genetics; Pedigree; Phenotypes; Reproductive Medicine; Reverse transcription; RNA Splicing - genetics; Western blotting; Whole genome sequencing
• ISSN: 1058-0468; 1573-7330; 1573-7330
• DOI: 10.1007/s10815-024-03219-1

Purpose As a cause of primary female infertility, oocyte maturation arrest (OMA) is characterized by failure to obtain mature oocytes due to abnormal meiosis. We aimed to identify pathogenic variants in two sisters with OMA phenotype from a non-consanguineous family. Methods Whole-exome sequencing and Sanger sequencing were conducted to identify and validate the disease-causing gene variant. Additionally, we performed a minigene assay, quantitative reverse transcription PCR, and Western blotting to assess the effects of the variant. Results We identified a novel homozygous splicing variant (c.1021-11T>C) in TRIP13 , which followed a recessive inheritance pattern. Minigene assay showed that the variant could disrupt the integrity of TRIP13 mRNA, as evidenced by the production of an alternative transcript with intron10 intermediate retention of 79 bp. Compared to normal controls, the expression of TRIP13 mRNA and abundance of TRIP13 protein were also significantly decreased in Epstein-Barr virus-immortalized lymphoblastoid cells derived from affected individuals. Conclusion Our findings confirm the contribution of genetic factors to OMA and expand the mutation spectrum of TRIP13 in female infertility.