Novel variants in the NARS2 gene as a cause of infantile-onset severe epilepsy leading to fatal refractory status epilepticus: case study and literature review

AbstractBiallelic variants in theNARS2 gene are the cause of a continuous spectrum of neurodegenerative disorders presenting with various severity-from spastic paraplegia, progressive neurodegeneration to Leigh and Alpers syndrome. Common clinical signs result from a mitochondrial dysfunction based on OXPHOS deficiency. Here, we present a patient with infantile-onset severe epilepsy leading to fatal refractory status epilepticus. Whole exome sequencing with Exomiser analysis based on HPO terms detected two novelNARS2 variants in a compound heterozygous state. To date, 18 differentNARS2 disease-causing mutations have been described. Our study adds to the understanding of this mitochondrial disorder.
Source: Neurogenetics - Category: Genetics & Stem Cells Source Type: research