Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:1.6.3.1 (NADPH oxidase)
 11,281 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The enzyme NADPH oxidase is involved in the production of oxygen free radicals. We measured its activity in neutrophils and monocytes obtained from patients with acute rheumatic fever, chronic rheumatic heart disease, acute streptococcal pharyngitis and normal controls. Follow up studies were made at 15 days, 3 months and 6 months. Streptococcal membrane antigen, carbohydrate antigens and latex were used to stimulate the oxidative activity in the neutrophils and monocytes. These three agents caused a significant increase in the enzyme activity of the phagocytes of patients with acute rheumatic fever and chronic rheumatic heart disease (p less than 0.001) but not in acute pharyngitis. Maximal NADPH oxidase enzyme activity was observed in patients with acute rheumatic fever. During the follow-up, there was a significant decline in the enzymatic activity in patients with acute rheumatic fever but not in those with chronic rheumatic heart disease. Enzymatic activity was greater when the phagocytic cells were triggered with membrane as compared to carbohydrate antigen and latex in all the groups and at all intervals. The enzymatic response of neutrophils and monocytes was similar although the magnitude of the NADPH oxidase activity was significantly higher in neutrophils than in monocytes.
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PMID:NADPH oxidase activity in the monocytes and neutrophils of patients with rheumatic fever. 187 89

The generation of oxygen free radicals (OFR) by peripheral blood monocytes and neutrophils of patients with rheumatic fever (RF) and rheumatic heart disease (RHD) has been studied using the luminol-enhanced chemiluminescence technique. The mechanism of OFR generation was studied by measuring NADPH oxidase enzyme activity. The effect of substrate was studied by measuring the hexose monophosphate (HMP) shunt enzymes: glucose-6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase. Three groups of patients [i) recurrent rheumatic activity, (ii) chronic RHD, (iii) acute pharyngitis) and normal controls were studied at day 0 and followed-up serially at 15, 90 and 180 days. The release of OFR, was significantly higher (P less than 0.001) in patients with recurrent rheumatic activity than in those with acute pharyngitis or chronic RHD, throughout the study period. A significant decline (P less than 0.001) in OFR release was observed from day 0 to day 180 in these patients, whereas no such change was observed in the chronic RHD group. This study raises the possibility that these phagocytic cells, which infiltrate the myocardium, may through generation of OFR, have a role in the pathogenesis of cardiac damage seen in patients with RHD.
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PMID:Release of oxygen free radicals by macrophages and neutrophils in patients with rheumatic fever. 191 47