Fiche publication
Date publication
avril 2025
Journal
European journal of human genetics : EJHG
Auteurs
Membres identifiés du Cancéropôle Est :
Pr BINQUET Christine
,
Pr FAIVRE Laurence
,
Pr PHILIPPE Christophe
,
Dr NAMBOT Sophie
,
Mr DUFFOURD Yannis
,
Pr THAUVIN-ROBINET Christel
Tous les auteurs :
Thauvin-Robinet C, Garde A, Favier M, Delanne J, Racine C, Rousseau T, Nambot S, Bruel AL, Moutton S, Quelin C, Colson C, Brehin AC, Guerrot AM, Rooryck C, Putoux A, Blanchet P, Odent S, Schaefer E, Boute O, Goldenberg A, Guichet A, Abel C, Morel G, Fradin M, Isidor B, Vincent M, Francannet C, Vera G, Petit F, Nizon M, Wells C, Jeanne M, Deiller C, Ziegler A, Godin M, Saugier-Veber P, Cassinari K, Blanc P, Simon E, Binquet C, Duffourd Y, Safraou H, Denomme-Pichon AS, Vitobello A, Philippe C, Faivre L, Tran-Mau-Them F, Bourgon N
Lien Pubmed
Résumé
In 30-40% of fetuses with structural defects, the causal variant remains undiagnosed after karyotype, chromosomal microarray, and exome sequencing. This study presents the results of a reanalysis of unsolved prenatal ES (pES) cases and investigates how postnatal/postmortem phenotyping contributes to identifying relevant variants. pES data was prospectively reanalyzed for unsolved cases enrolled in the AnDDI-Prénatome cohort study. Postnatal/postmortem data were included with prenatal features using Human Phenotype Ontology terms up to 3 years after pES. The reanalysis involved updating bioinformatic processing and querying raw data using a GREP query. We reanalyzed 58/94 (62%) unsolved pES cases, including 8 variants of unknown significance. Data for clinical examination at birth was available for all live newborns, and postmortem examination was available in 12 terminated fetuses. Additional features were identified at birth in 27/58 cases (44%): 9 terminated fetuses, 2 stillbirths, and 16 live newborns. One diagnosis (SNAPC4) was obtained through a periodic query following recent associations with human disease, and without additional clinical data. Three additional VUS were identified through reanalysis with the addition of new clinical features, illustrating the limited contribution of updated postnatal/postmortem phenotyping in identifying relevant variants after negative pES. In conclusion, the benefit of prospective reanalysis of unsolved pES is limited, even over time. Postnatal genome sequencing may be a more appropriate option than reanalysis with postnatal/postmortem phenotyping to establish a causal diagnosis.
Référence
Eur J Hum Genet. 2025 04 4;:
