Superoxide dismutase and the death of motoneurons in ALS - PubMed (original) (raw)
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Superoxide dismutase and the death of motoneurons in ALS
J S Beckman et al. Trends Neurosci. 2001 Nov.
Abstract
Amyotrophic lateral sclerosis (ALS) is a lethal disease that is characterized by the relentless death of motoneurons. Mutations to Cu-Zn superoxide dismutase (SOD), though occurring in just 2-3% of individuals with ALS, remain the only proven cause of the disease. These mutations structurally weaken SOD, which indirectly decreases its affinity for Zn. Zn-deficient SOD induces apoptosis in motoneurons through a mechanism involving peroxynitrite. Importantly, Zn-deficient wild-type SOD is just as toxic as Zn-deficient ALS mutant SOD, suggesting that the loss of Zn from wild-type SOD could be involved in the other 98% of cases of ALS. Zn-deficient SOD could therefore be an important therapeutic target in all forms of ALS.
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