Title :

Stratification of the risk of ovarian dysfunction by studying the complexity of intermediate and premutation alleles of the FMR1 gene.

Author(s) :

Quilichini, Juliette [Auteur]
Perol, Sandrine [Auteur]
Cuisset, Laurence [Auteur]
Grotto, Sarah [Auteur]
Fouveaut, Corinne [Auteur]
Barbot, Jean-Claude [Auteur]
Verebi, Camille [Auteur]
Jordan, Pénélope [Auteur]
Héron, Delphine [Auteur]
Molina-Gomes, Denise [Auteur]
Pipiras, Eva [Auteur]
Grynberg, Michael [Auteur]
Jonard-Catteau, Sophie [Auteur]
Lille Neurosciences & Cognition (LilNCog) - U 1172
Touraine, Philippe [Auteur]
Christin-Maître, Sophie [Auteur]
Plu-Bureau, Genevieve [Auteur]
El Khattabi, Laila [Auteur]
Bienvenu, Thierry [Auteur]

Journal title :

American Journal of Medical Genetics Part A

Abbreviated title :

Am J Med Genet A

Volume number :

194

Publication date :

2023-11-21

ISSN :

1552-4833

English keyword(s) :

diminished ovarian reserve
FMR1
FMR1 allelic complexity score
gray zone expansion
premature ovarian insufficiency
premutation

HAL domain(s) :

Sciences du Vivant [q-bio]

English abstract : [en]

FMR1 premutation female carriers are at risk of developing premature/primary ovarian insufficiency (POI) with an incomplete penetrance. In this study, we determined the CGG repeat size among 1095 women with diminished ...
Show more >FMR1 premutation female carriers are at risk of developing premature/primary ovarian insufficiency (POI) with an incomplete penetrance. In this study, we determined the CGG repeat size among 1095 women with diminished ovarian reserve (DOR) / POI and characterized the CGG/AGG substructure in 44 women carrying an abnormal FMR1 repeat expansion number, compared to a group of 25 pregnant women carrying an abnormal FMR1 CGG repeat size. Allelic complexity scores of the FMR1 gene were calculated and compared between the two groups. In the DOR/POI cohort, 2.1% of women presented with an intermediate repeat size and 1.9% with a premutation. Our results suggest that the risk of POI is highest in the mid-range of CGG repeats. We observed that the allelic score is significantly higher in POI women compared to the pregnant women group (p-value = 0.02). We suggest that a high allelic score due to more than 2 AGG interspersions in the context of an intermediate number of repetitions could favor POI. Larger studies are still needed to evaluate the relevance of this new tool for the determination of the individual risk of developing POI in women with abnormal number of CGG repeats.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
Inserm
CHU Lille

Collections :

• Lille Neurosciences & Cognition (LilNCog) - U 1172

Submission date :

2024-05-15T21:49:52Z
2024-12-11T13:17:29Z