ArticleJournal of assisted reproduction and genetics2026
The prevalence of pathogenic variants in medically actionable genes among individuals with idiopathic hypogonadotropic hypogonadism/Kallmann syndrome.
Article in Journal of assisted reproduction and genetics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeIdiopathic hypogonadotropic hypogonadism (IHH) and Kallmann syndrome (KS) are rare reproductive disorders with known genetic heterogeneity. Using exome sequencing, our group previously reported the prevalence of pathogenic and likely pathogenic (P/LP) variants in genes causing IHH/KS as the primary endpoint of our study. Here, we investigate the frequency of secondary findings (SF) to determine whether individuals with IHH/KS harbor an increased burden of P/LP variants in medically actionable genes (MAGs) defined by the American College of Medical Genetics and Genomics (ACMG).
methodsWe analyzed exome sequencing data from 156 individuals with clinically confirmed IHH/KS. Variants were filtered for P/LP classification using ACMG guidelines across all 84 MAGs in ACMG SF v3.3. Sanger sequencing was used for orthogonal confirmation. The prevalence of MAG variants was compared to external control datasets from the U.K. Biobank (UKB, ~ 50,000 genomes) and the NIH eMERGE Network (~ 21,000 genomes), both based on the ACMG SF v2.0 59-gene list.
resultsAmong 370,000 variants, 2 individuals (1.3%) carried validated P/LP variants in two distinct MAGs: SCN5A and MYBPC3. Genes 60-84, the additional 25 genes on the ACMG SF v3.3 list, yielded no additional variants. The prevalence of MAG variants in IHH/KS (1.3%) was not significantly different from UKB (2.0%) or eMERGE (2.5%) (OR vs. UKB: OR 0.64; 95% CI, 0.16-2.61; P = 0.57).
conclusionsThe frequency of P/LP variants in MAGs among IHH/KS patients is comparable to the general population, suggesting that MAG variants are not common in IHH/KS in contrast to some other types of infertility.
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