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Pathogenic variants in the human m(6)A reader YTHDC2 are associated with primary ovarian insufficiency

Primary ovarian insufficiency (POI) affects 1% of women and carries significant medical and psychosocial sequelae. Approximately 10% of POI has a defined genetic cause, with most implicated genes relating to biological processes involved in early fetal ovary development and function. Recently, Ythdc...

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Detalles Bibliográficos
Autores principales: McGlacken-Byrne, Sinéad M., Del Valle, Ignacio, Quesne Stabej, Polona Le, Bellutti, Laura, Garcia-Alonso, Luz, Ocaka, Louise A., Ishida, Miho, Suntharalingham, Jenifer P., Gagunashvili, Andrey, Ogunbiyi, Olumide K., Mistry, Talisa, Buonocore, Federica, Crespo, Berta, Moreno, Nadjeda, Niola, Paola, Brooks, Tony, Brain, Caroline E., Dattani, Mehul T., Kelberman, Daniel, Vento-Tormo, Roser, Lagos, Carlos F., Livera, Gabriel, Conway, Gerard S., Achermann, John C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Society for Clinical Investigation 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8983136/
https://www.ncbi.nlm.nih.gov/pubmed/35138268
http://dx.doi.org/10.1172/jci.insight.154671
Descripción
Sumario:Primary ovarian insufficiency (POI) affects 1% of women and carries significant medical and psychosocial sequelae. Approximately 10% of POI has a defined genetic cause, with most implicated genes relating to biological processes involved in early fetal ovary development and function. Recently, Ythdc2, an RNA helicase and N6-methyladenosine reader, has emerged as a regulator of meiosis in mice. Here, we describe homozygous pathogenic variants in YTHDC2 in 3 women with early-onset POI from 2 families: c. 2567C>G, p.P856R in the helicase-associated (HA2) domain and c.1129G>T, p.E377*. We demonstrated that YTHDC2 is expressed in the developing human fetal ovary and is upregulated in meiotic germ cells, together with related meiosis-associated factors. The p.P856R variant resulted in a less flexible protein that likely disrupted downstream conformational kinetics of the HA2 domain, whereas the p.E377* variant truncated the helicase core. Taken together, our results reveal that YTHDC2 is a key regulator of meiosis in humans and pathogenic variants within this gene are associated with POI.