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    NR5A1 gene variants repress the ovarian-specific WNT signaling pathway in 46,XX disorders of sex development patients

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    Author
    Knarston, IM; Robevska, G; van den Bergen, JA; Eggers, S; Croft, B; Yates, J; Hersmus, R; Looijenga, LHJ; Cameron, FJ; Monhike, K; ...
    Date
    2019-02-01
    Source Title
    Human Mutation
    Publisher
    WILEY
    University of Melbourne Author/s
    Ayers, Katie; Sinclair, Andrew; Cameron, Fergus; Knarston, Ingrid May; Eggers, Stefanie
    Affiliation
    Paediatrics (RCH)
    University General
    Metadata
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    Document Type
    Journal Article
    Citations
    Knarston, I. M., Robevska, G., van den Bergen, J. A., Eggers, S., Croft, B., Yates, J., Hersmus, R., Looijenga, L. H. J., Cameron, F. J., Monhike, K., Ayers, K. L. & Sinclair, A. H. (2019). NR5A1 gene variants repress the ovarian-specific WNT signaling pathway in 46,XX disorders of sex development patients. HUMAN MUTATION, 40 (2), pp.207-216. https://doi.org/10.1002/humu.23672.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/253080
    DOI
    10.1002/humu.23672
    Abstract
    Several recent reports have described a missense variant in the gene NR5A1 (c.274C>T; p.Arg92Trp) in a significant number of 46,XX ovotesticular or testicular disorders of sex development (DSDs) cases. The affected residue falls within the DNA-binding domain of the NR5A1 protein, however the exact mechanism by which it causes testicular development in 46,XX individuals remains unclear. We have screened a cohort of 26 patients with 46,XX (ovo)testicular DSD and identified three unrelated individuals with this NR5A1 variant (p.Arg92Trp), as well as one patient with a novel NR5A1 variant (c.779C>T; p.Ala260Val). We examined the functional effect of these changes, finding that while protein levels and localization were unaffected, variant NR5A1 proteins repress the WNT signaling pathway and have less ability to upregulate the anti-testis gene NR0B1. These findings highlight how NR5A1 variants impact ovarian differentiation across multiple pathways, resulting in a switch from ovarian to testis development in genetic females.

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