Infantile familial cardiomyopathy due to mitochondrial complex I and IV associated deficiency.
Neuromuscul Disord
; 3(1): 31-42, 1993 Jan.
Article
em En
| MEDLINE
| ID: mdl-8392409
ABSTRACT
Two brothers, aged 27 and 20 months, born from consanguineous healthy parents, presented with cardiomyopathy, lactic acidosis and carnitine abnormalities in serum and muscle, without clinical evidence of muscle involvement. The histochemical reaction for cytochrome c oxidase (COX) activity was negative in all muscle fibres, although the holoenzyme and subunits were present at a normal level, as shown by immunocytochemistry. The COX activity was, respectively, 5 and 25% of control values, in muscle biopsies. Partial deficiency of complex IV was confirmed in fresh isolated muscle mitochondria from patient 2 and was associated with a defect of complex I. Patient 1 died at age 3 yr 6 months. Partial improvement of cardiomyopathy in patient 2 was obtained under carnitine therapy, but seizures occurred and CT scan and magnetic resonance imaging (MRI) revealed thalamic hypodensity. Thus, the disorder appears to be progressive despite the clinical stabilization of the cardiomyopathy. This further demonstrates the complexity and clinical heterogeneity of combined respiratory chain complex deficiencies.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
NAD(P)H Desidrogenase (Quinona)
/
Deficiência de Citocromo-c Oxidase
/
Mitocôndrias Cardíacas
/
Mitocôndrias Musculares
/
Músculos
/
Cardiomiopatias
Tipo de estudo:
Risk_factors_studies
Limite:
Female
/
Humans
/
Infant
/
Male
Idioma:
En
Revista:
Neuromuscul Disord
Assunto da revista:
NEUROLOGIA
Ano de publicação:
1993
Tipo de documento:
Article
País de afiliação:
França