Abstract
Point mutations in the gene encoding Cu,Zn superoxide dismutase (SOD1) are associated with autosomal dominant familial amyotrophic lateral sclerosis (FALS). We have measured Cu,Zn SOD activity in lymphoblastoid cells from affected and at risk FALS patients carrying mutations in the SOD1 gene, FALS patients without mutations in the SOD1 gene, individuals affected by the sporadic form of the disease (SALS), normal controls and individuals with other neurological abnormalities. The results show a significant decrease in Cu,Zn SOD activity in affected and at risk FALS individuals as compared to FALS patients without mutations, SALS individuals, normal and neurological controls. It is concluded that decreased SOD activity may contribute, together with other as yet unknown factors, to motor neurone demise.
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