Abstract
Plasma Mono- and Diamine-Oxidase activities (MAO and DAO), two copper containing enzymes, were estimated in 5 patients with Wilson's disease, without treatment and during D-Penicillamine treatment. Ceruloplasmin and “free” copper plasma levels were simultaneously measured. MAO was elevated in all cases, while DAO was within normal limits. D-Penicillamine administration did not result in significant reductions of these enzyme activities. It is likely that alterations of copper metabolism induced by Wilson's disease and by D-Penicillamine administration do not affect the activity of MAO or DAO. The increase in MAO activity in Wilson's disease probably results from the hepatic fibrosis.
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