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Novel links among peroxiredoxins,endothelial dysfunction,and severity of atherosclerosis in type 2 diabetic patients with peripheral atherosclerotic disease
Authors:Eman El Eter  Abeer Al Masri  Shahid Habib  Hana Al Zamil  Ahmed Al Hersi  Fawaz Al Hussein  Mohamed Al Omran
Institution:1. Physiology Department, Medical College and King Khalid University Hospital, King Saud University, P.O. BOX 2925(29), Riyadh, 11464, Saudi Arabia
2. Cardiology Department, King Saud University, Riyadh, Saudi Arabia
3. Neurology Department, King Saud University, Riyadh, Saudi Arabia
4. Vascular Surgery Department, King Saud University, Riyadh, Saudi Arabia
Abstract:Peroxiredoxins, a group of antioxidant protein enzymes (PRDX1 to 6), are reported as antiatherogenic factors in animals; however, human studies are lacking. The present work aims to provide baseline data regarding the phenotype of PRDX1, 2, 4, and 6 in diabetic patients with peripheral atherosclerosis disease (PAD) and their relation to endothelial dysfunction (ED) and disease severity. Plasma levels of PRDX1, 2, 4, and 6 and markers of endothelial dysfunction (ICAM-1 and VCAM-1) were measured using ELISA in 55 type 2 diabetic patients having PAD and 25 healthy subjects. Ankle–brachial index (ABI), body mass index (BMI), triglycerides (TG), total cholesterol, HbA1c, and insulin resistance (HOMA IR) were measured. PRDX1, 2, 4, and 6 levels were significantly higher in patients compared to controls (PRDX1 21.9?±?5.71 vs 16.8?±?3.9 ng/ml, P?P?P?P?r?=??0.273, P?r?=??0.28, P?r?=?0.276, P?r?=?0.295, P?r?=?0.345, P?=?0.0037 and r?=?0.344, P?=?0.0038). Our results provide strong links among PRDXs, ED, and severity of PAD in diabetic patients which warrants further evaluation to clarify whether high circulating levels of PRDXs are a consequence of chronic atherosclerotic disease or a predisposing factor for later cardiovascular events.
Keywords:Peroxiredoxins  Oxidative stress  Atherosclerosis  Diabetes  Endothelial dysfunction  ABI
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