Merve Ergin1, Mustafa Caliskanturk2, Almila Senat3, Onur Akturk4, Ozcan Erel3. 1. Department of Biochemistry, 25 Aralik State Hospital, Gaziantep, Turkey. Electronic address: erginmerve@hotmail.com. 2. Department of Emergency Medicine, 25 Aralik State Hospital, Gaziantep, Turkey. 3. Department of Biochemistry, Yildirim Beyazit University, Faculty of Medicine, Ankara, Turkey. 4. Department of Biochemistry, 25 Aralik State Hospital, Gaziantep, Turkey.
Abstract
OBJECTIVES: Carbon monoxide (CO) remains the most common cause of lethal poisoning around the world. The purpose of this study was to investigate the homeostasis between thiol-disulfide couples and to evaluate oxidative status comprehensively in acute CO poisoning, using new parameters along with other well-known oxidant-antioxidant molecules. DESIGN AND METHODS: This case study consisted of 43 subjects who were diagnosed with carbon monoxide poisoning and 35 healthy individuals who were used as controls. Thiol-disulfide paired tests were examined in both groups using the method developed recently. RESULTS: Patients with CO poisoning had significantly higher levels of serum disulfide than the control patients (20.7±5.03 versus 16.43±3.97, p=0.001). Native thiol and total thiol levels were lower in the CO patient group than in the control group (p<0.001, for each variable). The disulfide/native thiol ratios and disulfide/total thiol ratios were significantly higher, while native thiol/total thiol ratios were significantly lower, in patients with acute CO poisoning than in the healthy controls (p<0.001, for all ratios). The disulfide/native ratios were negatively correlated with both total antioxidant response and paraoxonase and arylesterase values and were positively correlated with total oxidant status and ceruloplasmin values (p<0.05, for all correlations). CONCLUSIONS: Excessive disulfide levels and their related ratios were found in CO poisoning patients. In particular, the disulfide/native thiol ratio was identified as an indicator for overall oxidative status. Among CO poisoning patients, the thiol-disulfide balance was found to be impaired. Therefore, the disruption of thiol-disulfide homeostasis might be involved in CO toxicity.
OBJECTIVES:Carbon monoxide (CO) remains the most common cause of lethal poisoning around the world. The purpose of this study was to investigate the homeostasis between thiol-disulfide couples and to evaluate oxidative status comprehensively in acute CO poisoning, using new parameters along with other well-known oxidant-antioxidant molecules. DESIGN AND METHODS: This case study consisted of 43 subjects who were diagnosed with carbon monoxidepoisoning and 35 healthy individuals who were used as controls. Thiol-disulfide paired tests were examined in both groups using the method developed recently. RESULTS:Patients with CO poisoning had significantly higher levels of serum disulfide than the control patients (20.7±5.03 versus 16.43±3.97, p=0.001). Native thiol and total thiol levels were lower in the COpatient group than in the control group (p<0.001, for each variable). The disulfide/native thiol ratios and disulfide/total thiol ratios were significantly higher, while native thiol/total thiol ratios were significantly lower, in patients with acute CO poisoning than in the healthy controls (p<0.001, for all ratios). The disulfide/native ratios were negatively correlated with both total antioxidant response and paraoxonase and arylesterase values and were positively correlated with total oxidant status and ceruloplasmin values (p<0.05, for all correlations). CONCLUSIONS: Excessive disulfide levels and their related ratios were found in CO poisoningpatients. In particular, the disulfide/native thiol ratio was identified as an indicator for overall oxidative status. Among CO poisoningpatients, the thiol-disulfide balance was found to be impaired. Therefore, the disruption of thiol-disulfide homeostasis might be involved in CO toxicity.