Oxidative Stress Clinical Trial
Official title:
The Effects of Dexmedetomidine on Thiol/Disulphide Homeostasis in Coronary Bypass Surgery
Dexmedetomidine (DEX) is a sedative and anesthetic drug with known antioxidant properties.In this study, it was aimed to investigate the oxidative stress levels in patients undergoing on-pump CABG by measuring the thiol/disulfide levels and to investigate the effects of dexmedetomidine infusion used in Coronary Bypass Surgery on dynamic Thiol/Disulphide Homeostasis.
It is well known that cardiovascular disease is the leading cause of increased morbidity and mortality worldwide. One of the key surgical procedures that patients with coronary artery disease (CAD) are often subjected to is coronary artery bypass grafting (CABG). However, the cardiopulmonary bypass (CPB) pump increases systemic oxidative stress . High levels of molecular oxygen enter the body during cardiopulmonary bypass (CPB) and reperfusion, followed by inflammation leading to the formation of free oxygen radicals which causes lipid peroxidation, ultimately resulting in an oxidative attack at the cell and tissue level. Thiols are organic sulphur derivatives containing Sulfhydryl Residues (-SH) in their active regions. Thiols easily react with oxygen containing free radicals to form disulfides. This is a defence mechanism against oxidative stress.7 An automated analysis quantitatively measuring serum native and total thiol, and disulfides has been recently described as a method to determine dynamic Thiol/Disulfide Homeostasis (TDH).The role of dynamic thioldisulfide homeostasis has been increasingly shown in many diseases. There is a growing number of evidences that an abnormal thiol-disulfide homeostasis may play role in the pathogenesis of a variety of diseases such as cardiovascular disease, malignancies, rheumatoid arthritis, chronic kidney disease, and acquired immunodeficiency syndrome. Dexmedetomidine (DEX) is a sedative and anesthetic drug with known antioxidant properties.In this study, it was aimed to investigate the oxidative stress levels in patients undergoing on-pump CABG by measuring the thiol/disulfide levels and to investigate the effects of dexmedetomidine infusion used in Coronary Bypass Surgery on dynamic Thiol/Disulphide Homeostasis. ;
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