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Biallelic XPR1 mutation associated with primary familial brain calcification presenting as paroxysmal kinesigenic dyskinesia with infantile convulsions
- Source :
- Brain and Development. 43:331-336
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Background Mutations in the XPR1 gene are associated with primary familial brain calcifications (PFBC). All reported mutations are missense and inherited as an autosomal dominant trait. PFBC patients exhibited movement disorders, neuropsychiatric symptoms, and other associated symptoms with diverse severity, even within the same family. Materials and methods We identified and enrolled a patient with PFBC. Clinical data were comprehensively collected, including the age of onset, seizure types and frequency, trigger factors of paroxysmal dyskinesia, response to drugs, and general and neurological examination results. Whole-exome sequencing (WES) was performed to detect pathogenic variants. We further systematically reviewed the phenotypic and genetic features of patients with XPR1 mutations. Results The patient showed bilateral calcification involving basal ganglia and cerebellar dentate. Clinically, he presented as paroxysmal kinesigenic dyskinesia with infantile convulsions (PKD/IC) with favorable outcome. We identified a compound heterozygous XPR1 mutation (c.786_789delTAGA/p.D262Efs*6, c.1342C>T/p.R448W), which were inherited from unaffected parents respectively. Further literature review shows a wide range of clinical manifestations of patients with XPR1 mutations, with movement disorders being the most common. Conclusions This is the first report of biallelic mutations in XPR1. The findings suggest for the first time a possible link between PKD/IC and XPR1 mutations.
- Subjects :
- Mutation
medicine.medical_specialty
Movement disorders
Seizure types
business.industry
Autosomal dominant trait
General Medicine
Paroxysmal dyskinesia
medicine.disease_cause
Compound heterozygosity
Gastroenterology
03 medical and health sciences
0302 clinical medicine
Developmental Neuroscience
Internal medicine
Pediatrics, Perinatology and Child Health
medicine
Missense mutation
Neurology (clinical)
medicine.symptom
Age of onset
business
030217 neurology & neurosurgery
Subjects
Details
- ISSN :
- 03877604
- Volume :
- 43
- Database :
- OpenAIRE
- Journal :
- Brain and Development
- Accession number :
- edsair.doi...........32b8c4086ea8e93abce6711d8b3dd0fd
- Full Text :
- https://doi.org/10.1016/j.braindev.2020.09.014