1. STXBP1 encephalopathy is associated with awake bruxism.
- Author
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Rezazadeh A, Uddin M, Snead OC 3rd, Lira V, Silberberg A, Weiss S, Donner EJ, Zak M, Bradbury L, Scherer SW, Fasano A, and Andrade DM
- Subjects
- Adult, Bruxism complications, Bruxism diagnostic imaging, Child, Humans, Male, Middle Aged, Spasms, Infantile complications, Spasms, Infantile diagnostic imaging, Bruxism genetics, Munc18 Proteins genetics, Mutation genetics, Spasms, Infantile genetics, Wakefulness genetics
- Abstract
Heterozygous mutations in syntaxin-binding protein 1 (STXBP1) gene are associated with early infantile epileptic encephalopathy 4 (EIEE4). This condition is characterized by epilepsy, developmental delay (DD), and various movement disorders. Herein, we will report 5 unrelated patients with different de novo mutations in STXBP1. In addition, we conducted an online survey through Facebook to identify the incidence of bruxism (BRX) in these patients. Four out of 5 patients (80%) presented with awake BRX (A-BRX). Bruxism was also reported in 81.4% (57/70) of the patients with STXBP1 encephalopathy through the online questionnaire. No consistent correlation was identified between the type of mutation and development of movement disorders or BRX. This is the first study to demonstrate A-BRX in patients with STXBP1 mutation. Given the role of STXBP1 in exocytosis of neurotransmitters and other manifestations of dopamine dysregulation in patients with STXBP1-EIEE4, we suggest that in patients with STXBP1 encephalopathy, A-BRX might be the result of the involvement of dopaminergic circuits., (Copyright © 2018 Elsevier Inc. All rights reserved.)
- Published
- 2019
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