Leigh syndrome due to mitochondrial respiratory chain complex II deficiency / 中国当代儿科杂志
Chinese Journal of Contemporary Pediatrics
;
(12): 569-572, 2011.
Article
in Chinese
| WPRIM
| ID: wpr-339592
ABSTRACT
Mitochondrial respiratory chain complex II deficiency is a rare documented cause of mitochondrial diseases. This study reported a case of Leigh syndrome due to isolated complex II deficiency. A boy presented with progressive weakness, motor regression and dysphagia after fever from the age of 8 months and hospitalized at the age of 10 months. Elevated blood levels of lactate and pyruvate were observed. Brain magnetic resonance image showed symmetrical lesions in the basal ganglia. Mitochondrial respiratory chain complex I-V activities in peripheral leukocytes were measured using spectrophotometric assay. Mitochondrial gene screening of common point mutations was performed. The complex II activity in the peripheral leukocytes decreased to 21.9 nmol/min per mg mitochondrial protein (control 47.3±5.3 nmol/min per mg mitochondrial protein). The ratio of complex II activity to citrate synthase activity (22.1%) also decreased (control 50.9%±10.7 %). No point mutation was found in mitochondrial DNA. The boy was diagnosed as Leigh syndrome due to isolated complex II deficiency. Psychomotor improvements were observed after the treatment. The patient is 22 months old and in a stable condition.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Therapeutics
/
Leigh Disease
/
Mitochondrial Diseases
/
Electron Transport Complex II
/
Diagnosis
/
Diagnosis, Differential
Type of study:
Diagnostic study
Limits:
Humans
/
Infant
/
Male
Language:
Chinese
Journal:
Chinese Journal of Contemporary Pediatrics
Year:
2011
Type:
Article
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