ArticleMolecular genetics and metabolism reports2026
Intermittent ketogenic fasting with medium-chain triglycerides improves ataxia in COQ8A-related coenzyme Q10 deficiency: A case report.
Article in Molecular genetics and metabolism reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Mutations in COQ8A cause primary coenzyme Q10 deficiency, which can present clinically heterogeneously: Symptoms range from cerebellar ataxia, epilepsy, encephalomyopathy, macular degeneration to nephropathy. High-dose coenzyme Q10 supplementation is widely used, yet there is little evidence on complementary strategies, particularly for non-epileptic features such as cerebellar ataxia. Case presentation: We report a 46-year-old female with genetically confirmed COQ8A-related coenzyme Q10 (CoQ10) deficiency, presenting with ataxia and epilepsy characterized by myoclonic and bilateral tonic-clonic seizures, who participated in a clinical protocol of ketogenic intermittent fasting, a method of intermittent fasting combined with medium-chain triglycerides (MCT) primarily designed for seizure management. The patient followed a 16:8 intermittent fasting regime combined with MCT intake for three months, followed by three months of all-alone intermittent fasting. Routine blood markers and brain MRI, including diffusion imaging were obtained before and after ketogenic fasting. Results: During the study protocol, while no seizure reduction in myoclonic seizures could be observed, ataxia - quantified by the Scale for the Assessment and Rating of Ataxia (SARA) - improved significantly from 8.5 to 6.0 during the interventions. MRI showed a trend suggesting improved cerebellar microstructural integrity. Conclusions: This case highlights the potential of ketogenic intermittent fasting as an adjunct therapy for mitochondrial ataxia. Ketogenic intermittent fasting was associated with clinically meaningful improvement of ataxia in a patient with COQ8A-related CoQ10 deficiency, suggesting that ketogenic dietary strategies may represent a promising adjunct therapeutic approach for mitochondrial ataxia. Future research should assess this intervention in larger patient cohorts to confirm its potential benefits.
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