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  • 3-Methylglutaconic aciduria  (1)
  • Multiple respiratory chain defects  (1)
  • 1
    ISSN: 1432-1076
    Keywords: 3-Methylglutaconic aciduria ; 3-Methylglutaric aciduria ; 3-Methylglutaconyl-coenzyme A hydratase ; Phenotype ; Psychomotor retardation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract 3-Methylglutaconic aciduria has been found in two distinct syndromes. In one there is deficient activity of 3-methylglutaconyl coenzyme A hydratase, and the only clinical manifestation observed has been retardation of speech development. In the other, which includes a majority of the patients studied, we document that the activity of this enzyme in fibroblast extracts is normal. The phenotype of this disorder is one of profound neurological impairment with retarded psychomotor development, hypotonicity and/or spasticity, convulsions or EEG abnormalities, and sensorineural changes in the eye and ear.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    ISSN: 1432-1076
    Keywords: Multiple respiratory chain defects ; Skin fibroblasts ; Pyruvate dehydrogenase complex
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A female child suffering from intrauterine growth retardation was born by caesarean section at 32 weeks. In the immediate newborn period there was a metabolic acidosis but this resolved. Hypotonia, muscular weakness and poor respiratory effort were evident and the child died at 6 days of age. A previous male sibling had died at 3 months of age after similar symptoms with seizures and a dysmyelination disorder. Post-mortem examination of both children showed damage to the basal ganglia. Defects in the activities of the pyruvate dehydrogenase complex, cytochrome oxidase and succinate cytochrome c reductase were found in cultured skin fibroblasts. Similar defects were found in isolated muscle mitochondria but not in isolated liver mitochondria from the patient. Immunoblotting for cytochrome oxidase showed that the multienzyme complex was not assembled in muscle and skin fibroblast mitochondria, but was assembled in liver mitochondria. Similar results were obtained in cultured skin fibroblast mitochondria for complex I of the mitochondrial respiratory chain. This is the first occasion that multiple defects have been demonstrated both in tissue and in culture skin fibroblasts in mitochondrial respiratory chain complexes.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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