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Novel mutations in PATL2: expanding the mutational spectrum and corresponding phenotypic variability associated with female infertility.
Journal of Human Genetics 2019 Februrary 15
Oocyte maturation arrest results in primary female infertility, but the genetic etiology of this phenotype remains largely unknown. Previously, we and other groups have reported that biallelic mutations in PATL2 are mainly responsible for human oocyte germinal vesicle-stage arrest and that the specific phenotype varies for different mutations. Here, we identified four novel missense mutations (p.V260M, p.Q300*, p.T425P, and p.D293Y), a novel frameshift mutation (p.N239Tfs*9), and a reported splicing mutation (p.R75Vfs*21) in PATL2 in seven affected individuals from five unrelated families, showing a multiplicity of phenotypes in oocyte maturation arrest, fertilization failure, or embryonic developmental arrest, which further expands the mutational and phenotypic spectrum in patients with PALTL2 mutations. This work further indicates the critical role of PATL2 in oocyte maturation and early embryo development and will provide a basis for pursuing the determination of genetic variation in PALT2 as an additional criterion for evaluating the quality of oocytes and embryos for assisted reproduction techniques.
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