Assessing the landscape of STXBP1-related disorders in 534 individuals.
STXBP1
Human Phenotype Ontology
developmental and epileptic encephalopathy
epilepsy
genetics
Journal
Brain : a journal of neurology
ISSN: 1460-2156
Titre abrégé: Brain
Pays: England
ID NLM: 0372537
Informations de publication
Date de publication:
03 06 2022
03 06 2022
Historique:
received:
30
03
2021
revised:
30
07
2021
accepted:
10
08
2021
pubmed:
23
2
2022
medline:
9
6
2022
entrez:
22
2
2022
Statut:
ppublish
Résumé
Disease-causing variants in STXBP1 are among the most common genetic causes of neurodevelopmental disorders. However, the phenotypic spectrum in STXBP1-related disorders is wide and clear correlations between variant type and clinical features have not been observed so far. Here, we harmonized clinical data across 534 individuals with STXBP1-related disorders and analysed 19 973 derived phenotypic terms, including phenotypes of 253 individuals previously unreported in the scientific literature. The overall phenotypic landscape in STXBP1-related disorders is characterized by neurodevelopmental abnormalities in 95% and seizures in 89% of individuals, including focal-onset seizures as the most common seizure type (47%). More than 88% of individuals with STXBP1-related disorders have seizure onset in the first year of life, including neonatal seizure onset in 47%. Individuals with protein-truncating variants and deletions in STXBP1 (n = 261) were almost twice as likely to present with West syndrome and were more phenotypically similar than expected by chance. Five genetic hotspots with recurrent variants were identified in more than 10 individuals, including p.Arg406Cys/His (n = 40), p.Arg292Cys/His/Leu/Pro (n = 30), p.Arg551Cys/Gly/His/Leu (n = 24), p.Pro139Leu (n = 12), and p.Arg190Trp (n = 11). None of the recurrent variants were significantly associated with distinct electroclinical syndromes, single phenotypic features, or showed overall clinical similarity, indicating that the baseline variability in STXBP1-related disorders is too high for discrete phenotypic subgroups to emerge. We then reconstructed the seizure history in 62 individuals with STXBP1-related disorders in detail, retrospectively assigning seizure type and seizure frequency monthly across 4433 time intervals, and retrieved 251 anti-seizure medication prescriptions from the electronic medical records. We demonstrate a dynamic pattern of seizure control and complex interplay with response to specific medications particularly in the first year of life when seizures in STXBP1-related disorders are the most prominent. Adrenocorticotropic hormone and phenobarbital were more likely to initially reduce seizure frequency in infantile spasms and focal seizures compared to other treatment options, while the ketogenic diet was most effective in maintaining seizure freedom. In summary, we demonstrate how the multidimensional spectrum of phenotypic features in STXBP1-related disorders can be assessed using a computational phenotype framework to facilitate the development of future precision-medicine approaches.
Identifiants
pubmed: 35190816
pii: 6433675
doi: 10.1093/brain/awab327
pmc: PMC9166568
doi:
Substances chimiques
Munc18 Proteins
0
STXBP1 protein, human
0
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1668-1683Subventions
Organisme : NINDS NIH HHS
ID : K02 NS112600
Pays : United States
Organisme : NCATS NIH HHS
ID : UL1 TR001878
Pays : United States
Organisme : NICHD NIH HHS
ID : P50 HD105351
Pays : United States
Organisme : NINDS NIH HHS
ID : T32 NS091008
Pays : United States
Organisme : NICHD NIH HHS
ID : U54 HD086984
Pays : United States
Organisme : NINDS NIH HHS
ID : K23 NS121520
Pays : United States
Organisme : Medical Research Council
ID : MC_UU_00030/3
Pays : United Kingdom
Organisme : Wellcome Trust
Pays : United Kingdom
Organisme : Medical Research Council
ID : MC_UU_00005/16
Pays : United Kingdom
Organisme : NINDS NIH HHS
ID : U24 NS120854
Pays : United States
Informations de copyright
© The Author(s) (2021). Published by Oxford University Press on behalf of the Guarantors of Brain.
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