Plasma total homocysteine and cysteine levels as cardiovascular risk factors in coronary heart disease

International Journal of Cardiology
Yeşim OzkanBolkan Simşek

Abstract

As an important risk factor for coronary atherosclerosis, elevated plasma total homocysteine (t-hcy) concentration has recently received greater attention than have conventional risk factors. Though less reactive than homocysteine, cysteine (cys) is the most abundant plasma thiol and may function as an extracellular regulating factor of thiol/disulfide exchange in order to maintain an adequate redox status. An increase in the total amount of this compound may be noxious depending on environmental conditions. In the present study, the aim was to investigate changes of plasma total cysteine, homocysteine and other determinants in different types of coronary heart disease. Plasma total homocysteine (t-hcy), cysteine (t-cys), cysteinylglycine (t-cysgly), folic acid, vitamin B(12), lipid parameters, total protein, albumin and creatinine levels were studied in plasma from 68 patients with coronary heart disease and 42 healthy controls. After reduction of disulfide bonds with tri-n-buthylphosphine, plasma total thiols were assayed using high performance liquid chromatography (HPLC) and fluorescence detection following derivatization of sulfhydryl groups with 7-fluoro-benzo-2-oxa-1,3-diazole-4-sulfonate (SBD-F). Other parameters were d...Continue Reading

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