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Genetics of 46,XY gonadal dysgenesis

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.beem.2022.101633

Keywords

46,XY DSD; testis development; gonadal dysgenesis; high throughput sequencing; genetic etiology

Funding

  1. European Society of Pediatric Endocrinology
  2. Agence Nationale de la Recherche (ANR) [ANR-10-LABX-73 REVIVE, ANR-17-CE14-0038-01, ANR-19-CE14-0022, ANR-19-CE14-0012]
  3. Agence Nationale de la Recherche (ANR) [ANR-19-CE14-0012, ANR-17-CE14-0038] Funding Source: Agence Nationale de la Recherche (ANR)

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This article discusses the etiology of 46,XY gonadal dysgenesis (GD), evaluates known and unknown genes through functional studies, and proposes recommendations for interpreting data and establishing causality.
In 46,XY men, testis is determined by a genetic network(s) that both promotes testis formation and represses ovarian development. Disruption of this process results in a lack of testis-determination and affected individuals present with 46,XY gonadal dysgenesis (GD), a part of the spectrum of Disorders/Differences of Sex Development/Determination (DSD). A minority of all cases of GD are associated with pathogenic variants in key players of testis-determination, SRY, SOX9, MAP3K1 and NR5A1. However, most of the cases remain unexplained. Recently, unbiased exome sequencing approaches have revealed new genes and loci that may cause 46,XY GD. We critically evaluate the evidence to support causality of these factors and describe how functional studies are continuing to improve our understanding of genotype ephenotype relationships in genes that are established causes of GD. As genomic data continues to be generated from DSD cohorts, we propose several recommendations to help interpret the data and establish causality. (C) 2022 Published by Elsevier Ltd.

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