SOD2 (superoxide dismutase 2) is a member of the iron/manganese superoxide dismutase family. SOD2 binds to the superoxide byproducts of the mitochondrial electron transport chain and converts them to hydrogen peroxide and diatomic oxygen. Failure of SOD2 to remove the superoxide byproducts leads to an increase in mitochondrial reactive oxygen species resulting in biochemical aberrations with features reminiscent of mitochondrial myopathy, Friedreich ataxia, and HMGCL deficiency. Mutations in SOD2 have been associated with idiopathic cardiomyopathy (IDC), premature aging, sporadic motor neuron disease, and cancer.
Reactive oxygen species (ROS) have been implicated in a wide range of degenerative processes including amyotrophic lateral sclerosis, ischemic heart disease, Alzheimer disease, Parkinson disease and aging. ROS are generated by mitochondria as the toxic by-products of oxidative phosphorylation, their
Biochemical and biophysical research communications, 261(2), 332-339 (1999-07-30)
To reveal genetic risk factors of nonfamilial idiopathic cardiomyopathy (IDC) in Japanese, polymorphisms in the SOD2 and HLA-DRB1 genes were investigated in 86 patients and 380 healthy controls. There was a significant excess of homozygotes for the V allele [Val
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