Abstract
Whole-exome sequencing (WES) is frequently utilized in diagnosing reproductive genetic disorders to identify various genetic variants. Canonical ±1,2 splice sites are typically considered highly pathogenic, while variants at the 5' or 3' ends of exon boundaries are often considered synonymous or missense variants, with their potential impact on abnormal gene splicing frequently overlooked. In this study, we identified five variants located at the last two bases of the exons and two canonical splicing variants in five distinct families affected by reproductive genetic disorders through WES. Minigene analysis, RT-PCR and Quantitative Real-time PCR (RT-qPCR) confirmed that all seven variants induced aberrant splicing, with six variants altering gene transcriptional expression levels. These findings underscore the crucial role of splice variants, particularly non-canonical splice sites variants, in reproductive genetic disorders, with all identified variants classified as pathogenic.
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