Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0086543 (cataract)
 29,165 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Three patients suffering from the neonatal form of a syndrome characterized by congenital cataract, hypertrophic cardiomyopathy, and mitochondrial myopathy are described. The patients died at 7, 10 and 18 days, respectively from cardiorespiratory failure. Mitochondrial abnormalities were observed in the heart and skeletal muscle. Despite the presence of a severe lactic acidaemia pointing to a disturbed pyruvate oxidation rate in vivo, a normal pyruvate oxidation rate was demonstrated in skeletal muscle homogenates. The activities of several enzymes of the mitochondrial respiratory chain appeared to be normal, indicating an intact respiratory chain. A myoglobinopenia could be excluded. The activities of some mitochondrial enzymes and the concentration of myoglobin increase with age.
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PMID:Fatal neonatal cardiomyopathy associated with cataract and mitochondrial myopathy. 274 41

alpha-Lipoic acid, which plays an essential role in mitochondrial dehydrogenase reactions, has recently gained considerable attention as an antioxidant. Lipoate, or its reduced form, dihydrolipoate, reacts with reactive oxygen species such as superoxide radicals, hydroxyl radicals, hypochlorous acid, peroxyl radicals, and singlet oxygen. It also protects membranes by interacting with vitamin C and glutathione, which may in turn recycle vitamin E. In addition to its antioxidant activities, dihydrolipoate may exert prooxidant actions through reduction of iron. alpha-Lipoic acid administration has been shown to be beneficial in a number of oxidative stress models such as ischemia-reperfusion injury, diabetes (both alpha-lipoic acid and dihydrolipoic acid exhibit hydrophobic binding to proteins such as albumin, which can prevent glycation reactions), cataract formation, HIV activation, neurodegeneration, and radiation injury. Furthermore, lipoate can function as a redox regulator of proteins such as myoglobin, prolactin, thioredoxin and NF-kappa B transcription factor. We review the properties of lipoate in terms of (1) reactions with reactive oxygen species; (2) interactions with other antioxidants; (3) beneficial effects in oxidative stress models or clinical conditions.
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PMID:alpha-Lipoic acid as a biological antioxidant. 764 94