Aggregation and Motor Neuron Toxicity of an ALS-Linked SOD1 Mutant Independent from Wild-Type SOD1
1998; American Association for the Advancement of Science; Volume: 281; Issue: 5384 Linguagem: Inglês
10.1126/science.281.5384.1851
ISSN1095-9203
AutoresLucie Bruijn, Megan K. Houseweart, Shinsuke Kato, Karen Anderson, Scott Anderson, Eisaku Ohama, Andrew G. Reaume, Rick W. Scott, Don W. Cleveland,
Tópico(s)Cholinesterase and Neurodegenerative Diseases
ResumoAnalysis of transgenic mice expressing familial amyotrophic lateral sclerosis (ALS)–linked mutations in the enzyme superoxide dismutase (SOD1) have shown that motor neuron death arises from a mutant-mediated toxic property or properties. In testing the disease mechanism, both elimination and elevation of wild-type SOD1 were found to have no effect on mutant-mediated disease, which demonstrates that the use of SOD mimetics is unlikely to be an effective therapy and raises the question of whether toxicity arises from superoxide-mediated oxidative stress. Aggregates containing SOD1 were common to disease caused by different mutants, implying that coaggregation of an unidentified essential component or components or aberrant catalysis by misfolded mutants underlies a portion of mutant-mediated toxicity.
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