New findings reported in tomorrow’s issue of Science, however, cast doubt on this idea. L.I. Bruijn and colleagues decided to test the theory by studying the effects of eliminating or raising levels of normal SOD1 in mice. They found that, contrary to what the theory predicts, manipulating SOD1 levels had no effect. The finding casts doubt on the idea that nerve cell death in ALS arises from oxidative stress tied to abnormal SOD1, the authors say. Their work suggests that drugs designed to scavenge oxygen radicals are unlikely to help patients with ALS.-June Kinoshita.
Reference:Bruijn LI, Houseweart MK, Anderson KL, Anderson SD, Cleveland DW, Kato S, Ohama E, Reaume AG, Scott RW. Aberrant aggregates and motor neuron toxicity of a familial ALS-linked SOD1 mutant: independence from wildtype SOD1. Abstract
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