Document Detail

Free radical reaction products and antioxidant capacity in beating heart coronary artery surgery compared to conventional bypass.
MedLine Citation:
PMID:  21639848     Owner:  NLM     Status:  In-Data-Review    
Oxygen-derived free radicals are important agents of tissue injury during ischemia and reperfusion. The aim of this study was to investigate changes in protein and lipid oxidation and antioxidant status in beating heart coronary artery surgery and conventional bypass and to compare oxidative stress parameters between the two bypass methods. Serum lipid hydroperoxide, nitric oxide, protein carbonyl, nitrotyrosine, vitamin E, and β-carotene levels and total antioxidant capacity were measured in blood of 30 patients undergoing beating heart coronary artery surgery (OPCAB, off-pump coronary artery bypass grafting) and 12 patients undergoing conventional bypass (CABG, on-pump coronary artery bypass grafting). In the OPCAB group, nitric oxide and nitrotyrosine levels decreased after reperfusion. Similarly, β-carotene level and total antioxidant capacity also decreased after anesthesia and reperfusion. In the CABG group, nitric oxide and nitrotyrosine levels decreased after ischemia and reperfusion. However, protein carbonyl levels elevated after ischemia and reperfusion. Vitamin E, β-carotene, and total antioxidant capacity decreased after ischemia and reperfusion. Significantly decreased nitration and impaired antioxidant status were seen after reperfusion in both groups. Moreover, elevated protein carbonyls were found in the CABG group. The off-pump procedure is associated with lower degree of oxidative stress than on-pump coronary surgery.
A Gonenc; A Hacışevki; H R Griffiths; M Torun; B Bakkaloglu; B Simsek
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biochemistry. Biokhimii͡a     Volume:  76     ISSN:  1608-3040     ISO Abbreviation:  Biochemistry Mosc.     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-06-06     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376536     Medline TA:  Biochemistry (Mosc)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  677-85     Citation Subset:  IM    
Department of Biochemistry, Faculty of Pharmacy, Gazi University, Ankara, Turkey.
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