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BRAT1-related disorders: phenotypic spectrum and phenotype-genotype correlations from 97 patients.

ABSTRACT: BRAT1 biallelic variants are associated with rigidity and multifocal seizure syndrome, lethal neonatal (RMFSL), and neurodevelopmental disorder associating cerebellar atrophy with or without seizures syndrome (NEDCAS). To date, forty individuals have been reported in the literature. We collected clinical and molecular data from 57 additional cases allowing us to study a large cohort of 97 individuals and draw phenotype-genotype correlations. Fifty-nine individuals presented with BRAT1-related RMFSL phenotype. Most of them had no psychomotor acquisition (100%), epilepsy (100%), microcephaly (91%), limb rigidity (93%), and died prematurely (93%). Thirty-eight individuals presented a non-lethal phenotype of BRAT1-related NEDCAS phenotype. Seventy-six percent of the patients in this group were able to walk and 68% were able to say at least a few words. Most of them had cerebellar ataxia (82%), axial hypotonia (79%) and cerebellar atrophy (100%). Genotype-phenotype correlations in our cohort revealed that biallelic nonsense, frameshift or inframe deletion/insertion variants result in the severe BRAT1-related RMFSL phenotype (46/46; 100%). In contrast, genotypes with at least one missense were more likely associated with NEDCAS (28/34; 82%). The phenotype of patients carrying splice variants was variable: 41% presented with RMFSL (7/17) and 59% with NEDCAS (10/17).

SUBMITTER: Engel C

PROVIDER: S-EPMC10474045 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature

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BRAT1-related disorders: phenotypic spectrum and phenotype-genotype correlations from 97 patients.

Engel Camille C Valence Stéphanie S Delplancq Geoffroy G Maroofian Reza R Accogli Andrea A Agolini Emanuele E Alkuraya Fowzan S FS Baglioni Valentina V Bagnasco Irene I Becmeur-Lefebvre Mathilde M Bertini Enrico E Borggraefe Ingo I Brischoux-Boucher Elise E Bruel Ange-Line AL Brusco Alfredo A Bubshait Dalal K DK Cabrol Christelle C Cilio Maria Roberta MR Cornet Marie-Coralie MC Coubes Christine C Danhaive Olivier O Delague Valérie V Denommé-Pichon Anne-Sophie AS Di Giacomo Marilena Carmela MC Doco-Fenzy Martine M Engels Hartmut H Cremer Kirsten K Gérard Marion M Gleeson Joseph G JG Heron Delphine D Goffeney Joanna J Guimier Anne A Harms Frederike L FL Houlden Henry H Iacomino Michele M Kaiyrzhanov Rauan R Kamien Benjamin B Karimiani Ehsan Ghayoor EG Kraus Dror D Kuentz Paul P Kutsche Kerstin K Lederer Damien D Massingham Lauren L Mignot Cyril C Morris-Rosendahl Déborah D Nagarajan Lakshmi L Odent Sylvie S Ormières Clothilde C Partlow Jennifer Neil JN Pasquier Laurent L Penney Lynette L Philippe Christophe C Piccolo Gianluca G Poulton Cathryn C Putoux Audrey A Rio Marlène M Rougeot Christelle C Salpietro Vincenzo V Scheffer Ingrid I Schneider Amy A Srivastava Siddharth S Straussberg Rachel R Striano Pasquale P Valente Enza Maria EM Venot Perrine P Villard Laurent L Vitobello Antonio A Wagner Johanna J Wagner Matias M Zaki Maha S MS Zara Federizo F Lesca Gaetan G Yassaee Vahid Reza VR Miryounesi Mohammad M Hashemi-Gorji Farzad F Beiraghi Mehran M Ashrafzadeh Farah F Galehdari Hamid H Walsh Christopher C Novelli Antonio A Tacke Moritz M Sadykova Dinara D Maidyrov Yerdan Y Koneev Kairgali K Shashkin Chingiz C Capra Valeria V Zamani Mina M Van Maldergem Lionel L Burglen Lydie L Piard Juliette J

European journal of human genetics : EJHG 20230621 9

BRAT1 biallelic variants are associated with rigidity and multifocal seizure syndrome, lethal neonatal (RMFSL), and neurodevelopmental disorder associating cerebellar atrophy with or without seizures syndrome (NEDCAS). To date, forty individuals have been reported in the literature. We collected clinical and molecular data from 57 additional cases allowing us to study a large cohort of 97 individuals and draw phenotype-genotype correlations. Fifty-nine individuals presented with BRAT1-related RM ...[more]

PMID: 37344571

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Dataset Information

BRAT1-related disorders: phenotypic spectrum and phenotype-genotype correlations from 97 patients.

Publications

BRAT1-related disorders: phenotypic spectrum and phenotype-genotype correlations from 97 patients.

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