Biallelic mutations in PSMC3IP are associated with secondary amenorrhea: expanding the spectrum of premature ovarian insufficiency

Abstract

Premature ovarian insufficiency (POI) has a strong genetic component, but, in most cases, the etiology remains unidentified. PSMC3IP is an autosomal recessive gene for POI and ovarian dysgenesis, and so far, biallelic mutations in this gene have been described in only four independent families, with all affected members showing primary amenorrhea. Here, we report on the first family with recessive variants in the PSMC3IP gene and POI in a patient with secondary amenorrhea. Whole-exome sequencing (WES) was performed on a 29-year-old woman with secondary amenorrhea and POI; she was found to carry compound heterozygous variants in the PSMC3IP gene: c.206_208delAGA and c.189 G > T. Her younger sister, who also presented with a suspect of POI due to infertility and very low levels of anti-müllerian hormone (AMH), was found to carry the same PSMC3IP variants. Our case report shows the importance to include PSMC3IP in designed POI NGS panels or in WES/WGS studies in patients with either primary or secondary amenorrhea.

Keywords: Next-generation sequencing (NGS); PSMC3IP; Premature ovarian insufficiency (POI); Secondary amenorrhea; Whole-exome sequencing (WES).