ZSWIM7 Is associated with human female meiosis and familial primary ovarian insufficiency

McGlacken-Byrne, Sinéad M., Le Quesne Stabej, Polona, Del Valle, Ignacio, Ocaka, Louise, Gagunashvili, Andrey, Crespo, Berta, Moreno, Nadjeda, James, Chela, Bacchelli, Chiara, Dattani, Mehul T., Williams, Hywel J. ORCID: https://orcid.org/0000-0001-7758-0312, Kelberman, Dan, Achermann, John C. and Conway, Gerard S. 2022. ZSWIM7 Is associated with human female meiosis and familial primary ovarian insufficiency. Journal of Clinical Endocrinology and Metabolism 107 (1) , e254-e263. 10.1210/clinem/dgab597

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Abstract

Background Primary ovarian insufficiency (POI) affects 1% of women and is associated with significant medical consequences. A genetic cause for POI can be found in up to 30% of women, elucidating key roles for these genes in human ovary development. Objective We aimed to identify the genetic mechanism underlying early-onset POI in 2 sisters from a consanguineous pedigree. Methods Genome sequencing and variant filtering using an autosomal recessive model was performed in the 2 affected sisters and their unaffected family members. Quantitative reverse transcriptase PCR (qRT-PCR) and RNA sequencing were used to study the expression of key genes at critical stages of human fetal gonad development (Carnegie Stage 22/23, 9 weeks post conception (wpc), 11 wpc, 15/16 wpc, 19/20 wpc) and in adult tissue. Results Only 1 homozygous variant cosegregating with the POI phenotype was found: a single nucleotide substitution in zinc finger SWIM-type containing 7 (ZSWIM7), NM_001042697.2: c.173C > G; resulting in predicted loss-of-function p.(Ser58*). qRT-PCR demonstrated higher expression of ZSWIM7 in the 15/16 wpc ovary compared with testis, corresponding to peak meiosis in the fetal ovary. RNA sequencing of fetal gonad samples showed that ZSWIM7 has a similar temporal expression profile in the developing ovary to other homologous recombination genes. Main conclusions Disruption of ZSWIM7 is associated with POI in humans. ZSWIM7 is likely to be important for human homologous recombination; these findings expand the range of genes associated with POI in women.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Medicine
Additional Information:	This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https:// creativecommons.org/licenses/by/4.0/)
Publisher:	Endocrine Society
ISSN:	0021-972X
Date of First Compliant Deposit:	14 September 2021
Date of Acceptance:	6 August 2021
Last Modified:	03 May 2023 12:57
URI:	https://orca.cardiff.ac.uk/id/eprint/144091

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