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Erschienen in:
11.02.2020 | Genetics
Novel homozygous mutations in PATL2 lead to female infertility with oocyte maturation arrest
Erschienen in: Journal of Assisted Reproduction and Genetics | Ausgabe 4/2020
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Purpose
To identify the disease gene in 40 patients with female infertility due to oocyte maturation arrest.
Methods
Genomic DNA was extracted from peripheral blood of 40 patients and their family members. Whole-exome sequencing was performed on the patients, and the PATL2 mutations were identified and confirmed by Sanger sequencing. Harmfulness of the mutations was analyzed by SIFT, Polyphen-2, Mutation Taster, and M-CAP software, and we used western immunoblotting analysis to check the effect of mutations on PATL2 protein expression in vitro.
Results
Two novel missense mutations c.1528C>A (p.Pro510Thr) and c.1376C>A (p.Ser459Tyr) in PATL2 were identified in three patients (7.5%) from two consanguineous families in our cohort. We found that mutations in PATL2 resulted in variable oocyte phenotypes, including GV arrest, MI arrest, and morphologic abnormalities. Western immunoblotting analysis showed that the expression levels of the two novel mutant PATL2 proteins decreased significantly.
Conclusions
We identified two novel PATL2 mutations that caused oocyte maturation arrest and abnormal morphology, and variable phenotypes in patients.