Clinical and molecular characterization of patients affected by Beckwith-Wiedemann spectrum conceived through assisted reproduction techniques.
Clin Genet
; 102(4): 314-323, 2022 10.
Article
em En
| MEDLINE
| ID: mdl-35842840
ABSTRACT
The prevalence of Beckwith-Wiedemann spectrum (BWSp) is tenfold increased in children conceived through assisted reproductive techniques (ART). More than 90% of ART-BWSp patients reported so far display imprinting center 2 loss-of-methylations (IC2-LoM), versus 50% of naturally conceived BWSp patients. We describe a cohort of 74 ART-BWSp patients comparing their features with a cohort of naturally conceived BWSp patients, with the ART-BWSp patients previously described in literature, and with the general population of children born from ART. We found that the distribution of UPD(11)pat was not significantly different in ART and naturally conceived patients. We observed 68.9% of IC2-LoM and 16.2% of mosaic UPD(11)pat in our ART cohort, that strongly differ from the figure reported in other cohorts so far. Since UPD(11)pat likely results from post-fertilization recombination events, our findings allows to hypothesize that more complex molecular mechanisms, besides methylation disturbances, may underlie BWSp increased risk in ART pregnancies. Moreover, comparing the clinical features of ART and non-ART BWSp patients, we found that ART-BWSp patients might have a milder phenotype. Finally, our data show a progressive increase in the prevalence of BWSp over time, paralleling that of ART usage in the last decades.
Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Síndrome de Beckwith-Wiedemann
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Impressão Genômica
Tipo de estudo:
Risk_factors_studies
Limite:
Female
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Humans
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Pregnancy
Idioma:
En
Revista:
Clin Genet
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
Itália