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Objective To analyze genetically based impairment in histamine-metabolising enzymes in patients with Parkinson’s disease (PD). Methods Leukocytary DNA from 214 PD patients and a control group of 295 unrelated healthy individuals was studied for nonsynonymous histamine N-methyltransferase (HNMT) and diamine oxidase (ABP1) polymorphisms by using amplification–restriction analyses. Results An...
Serum diamine oxidase (DAO; EC 1.4.3.6) activity is often employed as a clinical indicator of the integrity of intestinal mucosa. However, interindividual variation in enzyme activity and reference values for healthy women and men have not been studied.DAO activity was measured by using cadaverine coupled to O-dianisidine oxidation in 50 healthy individuals.The mean activity was 7.59±3.67 U/L for...
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