title: In-stent stenosis: potential role of increased oxidative stress and glutathione-linked detoxification mechanisms.
abstract: This study was designed to determine whether red-cell oxidative stress status and antioxidant enzyme levels can serve as markers in patients predisposed to in-stent stenosis. Blood was collected from patient groups undergoing coronary angiography for chest pain evaluation, namely, group A (without coronary artery disease), group B (previous coronary stents without in-stent stenosis), and group C (previous coronary stents with in-stent stenosis). Thiobarbituric acid reactive substances (measure of lipid peroxidation), glutathione-linked detoxification enzymes, catalase, and superoxide dismutase were determined. Compared with group A, patients in group C showed increased lipid peroxidation products and glutathione-S-transferase but decreased glutathione peroxidase and glutathione reductase activities. Results in group B patients were intermediate between those of groups A and C with significant decreases in glutathione peroxidase versus controls. In-stent stenosis is associated with significant increase in lipid peroxidation and attenuated glutathione-linked detoxification enzymes, consistent with oxidative stress.
authors.affiliation: Division of Cardiology, Department of Medicine, Louisiana State University Health Sciences Center, Shreveport, Louisiana 71130, USA.
authors.forename: Praphul
authors.initials: P
authors.lastname: Misra
authors.forename: Pratap C
authors.initials: PC
authors.lastname: Reddy
authors.forename: Deepti
authors.initials: D
authors.lastname: Shukla
authors.forename: Gloria C
authors.initials: GC
authors.lastname: Caldito
authors.forename: Lakshminarayan
authors.initials: L
authors.lastname: Yerra
authors.forename: Tak Y
authors.initials: TY
authors.lastname: Aw
mesh_terms: D000328:Adult; D000787:Angina Pectoris / Q000097:blood* / Q000000981:diagnostic imaging; D000975:Antioxidants / Q000378:metabolism*; D002374:Catalase / Q000097:blood; D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000097:blood / Q000000981:diagnostic imaging / Q000628:therapy*; D023903:Coronary Restenosis / Q000097:blood* / Q000000981:diagnostic imaging; D004912:Erythrocytes / Q000201:enzymology / Q000378:metabolism*; D005260:Female; D005978:Glutathione / Q000097:blood*; D005979:Glutathione Peroxidase / Q000097:blood; D005980:Glutathione Reductase / Q000097:blood; D005982:Glutathione Transferase / Q000097:blood; D006801:Humans; D015227:Lipid Peroxidation; D008297:Male; D008875:Middle Aged; D018384:Oxidative Stress; D015607:Stents; D013482:Superoxide Dismutase / Q000097:blood; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism; D016896:Treatment Outcome
chemical_list: D000975:Antioxidants; D017392:Thiobarbituric Acid Reactive Substances; D002374:Catalase; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D005980:Glutathione Reductase; D005982:Glutathione Transferase; D005978:Glutathione