Abstract
To investigate the impact of alpha-lipoic acid (ALA) on inflammation, oxidative stress, anemia, and glycemic parameters and their association with cardiovascular risk in diabetic patients on hemodialysis. In this multi-center, randomized, controlled study, 60 diabetic patients on hemodialysis were randomized into control group (n=30) which received Epoetin-alpha plus insulin therapy, and alpha-lipoic acid group (n=30) which received the same treatment plus alpha-lipoic acid (ALA) 600 mg once daily. Serum levels of high sensitivity C-reactive protein (hs-CRP), tumor necrosis factor-alpha (TNF-α), 8-hydroxy-2'-deoxyguanosine (8-OHdG), creatinine, urea, blood urea nitrogen (BUN), hemoglobin (Hb), iron parameters, fasting blood glucose (FBG), glycated hemoglobin (HbA1c), and fructosamine were measured at baseline and six months after intervention. The ankle-brachial index (ABI) was used to evaluate the clinical outcome. Erythropoietin resistance index (ERI), the weekly cost of Epoetin-alpha doses, and the total cost were calculated. The two groups were statistically similar at baseline. After the intervention, as compared to the control group, ALA group showed significant reductions in serum levels of hs-CRP, TNF-α, 8-OHdG (p<0.001), urea, and BUN (p=0.029) with significant elevations in Hb concentration (p<0.001), serum iron (p=0.037) and transferrin saturation (p<0.001). ALA group showed a significant decline in FBG (p=0.004), HbA1c (p<0.001), fructosamine (p=0.005), ERI (p<0.001), weekly doses, and the weekly cost of Epoetin-alpha, and the total cost (p<0.001). ALA provided a cardio-protective effect, whereas the percentage of patients with acceptable ABI (0.9-1) was significantly higher in ALA group than in the control group (p=0.024), and those with abnormally low ABI (<0.9) were lower in the ALA group. Due to its efficacy and safety, alpha-lipoic acid represents a pharmaco-economic supplement for diabetic patients on hemodialysis. Further trials are needed for complete evaluation of ALA effects.
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