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  • Title: Deep Brain Stimulation for the Management of AIFM1-Related Disabling Tremor: A Case Series.
    Author: Tunyi J, Abreu NJ, Tripathi R, Mathew MT, Mears A, Agrawal P, Thakur V, Rezai AR, Reyes EL.
    Journal: Pediatr Neurol; 2023 May; 142():47-50. PubMed ID: 36907087.
    Abstract:
    The AIFM1 gene encodes a mitochondrial protein that acts as a flavin adenine dinucleotide-dependent nicotinamide adenine dinucleotide oxidase and apoptosis regulator. Monoallelic pathogenic AIFM1 variants result in a spectrum of X-linked neurological disorders, including Cowchock syndrome. Common features in Cowchock syndrome include a slowly progressive movement disorder, cerebellar ataxia, progressive sensorineural hearing loss, and sensory neuropathy. We identified a novel maternally inherited hemizygous missense AIFM1 variant, c.1369C>T p.(His457Tyr), in two brothers with clinical features consistent with Cowchock syndrome using next-generation sequencing. Both individuals had a progressive complex movement disorder phenotype, including disabling tremor poorly responsive to medications. Deep brain stimulation (DBS) of the ventral intermediate thalamic nucleus ameliorated contralateral tremor and improved their quality of life; this suggests the beneficial role for DBS in treatment-resistant tremor within AIFM1-related disorders.
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