Abstract
In two previous studies we found copper dyshomeostasis in patients with Alzheimer's disease and in patients with Parkinson's disease. In this study, the levels of copper in plasma, of ceruloplasmin in serum, ceruloplasmin oxidative activity, ceruloplasmin specific oxidative activity (activity related to mass) as well as superoxide dismutase (SOD) activity in erythrocytes have been determined in 14 patients with amyotrophic lateral sclerosis and their healthy age- and gender-matched controls. Three of the patients had a familial form of the disease or were suspected of having it. The mean values of all parameters were found not to differ significantly between the patients and their controls (Student's t-test; P>0.05). By testing the equality of variances (F distribution) we found that the variances of individual results for ceruloplasmin specific oxidative activity and SOD activity differed significantly between the patients group and the controls group (P= 0.021 and P=0.003), but the individual results of these two activities were not correlated (P>0.05). We conclude that disturbances in ceruloplasmin specific oxidative activity and SOD activity could contribute to motor neurone death in amyotrophic lateral sclerosis, and since the two enzyme activities are not correlated it is uncertain which one is more closely related to the pathology of the disease.
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