Association between coenzyme Q10 and glucose transporter (GLUT1) deficiency.
BMC Pediatr
; 14: 284, 2014 Nov 08.
Article
in En
| MEDLINE
| ID: mdl-25381171
ABSTRACT
BACKGROUND:
It has been demonstrated that glucose transporter (GLUT1) deficiency in a mouse model causes a diminished cerebral lipid synthesis. This deficient lipid biosynthesis could contribute to secondary CoQ deficiency. We report here, for the first time an association between GLUT1 and coenzyme Q10 deficiency in a pediatric patient. CASE PRESENTATION We report a 15 year-old girl with truncal ataxia, nystagmus, dysarthria and myoclonic epilepsy as the main clinical features. Blood lactate and alanine values were increased, and coenzyme Q10 was deficient both in muscle and fibroblasts. Coenzyme Q10 supplementation was initiated, improving ataxia and nystagmus. Since dysarthria and myoclonic epilepsy persisted, a lumbar puncture was performed at 12 years of age disclosing diminished cerebrospinal glucose concentrations. Diagnosis of GLUT1 deficiency was confirmed by the presence of a de novo heterozygous variant (c.18+2T>G) in the SLC2A1 gene. No mutations were found in coenzyme Q10 biosynthesis related genes. A ketogenic diet was initiated with an excellent clinical outcome. Functional studies in fibroblasts supported the potential pathogenicity of coenzyme Q10 deficiency in GLUT1 mutant cells when compared with controls.CONCLUSION:
Our results suggest that coenzyme Q10 deficiency might be a new factor in the pathogenesis of G1D, although this deficiency needs to be confirmed in a larger group of G1D patients as well as in animal models. Although ketogenic diet seems to correct the clinical consequences of CoQ deficiency, adjuvant treatment with CoQ could be trialled in this condition if our findings are confirmed in further G1D patients.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Ataxia
/
Ubiquinone
/
Muscle Weakness
/
Mitochondrial Diseases
/
Glucose Transporter Type 1
Type of study:
Diagnostic_studies
/
Prognostic_studies
/
Risk_factors_studies
Limits:
Adolescent
/
Female
/
Humans
Language:
En
Journal:
BMC Pediatr
Journal subject:
PEDIATRIA
Year:
2014
Document type:
Article