The effect of statin therapy on oxidative stress indices in patients with arterial hypertension and type 2 diabetes mellitus

Objective: to study the effect of statin therapy on the oxidative and antioxidant systems parameters in patients with arterial hypertension (AH) and cocomitant type 2 diabetes mellitus (DM2T). Materials and methods. 126 patients (55 males and 71 females, average age was 57.8 +/- 6.2 years) with AH stage II and compensated DM2T were divided into 2 groups: the 1 group - with AH and DM2T (n = 69), who were constantly taking statins (rosuvastatin 10 mg/day or atorvastatin 20 mg/day) for at least 1 year; the 2 group - patients with AH and DM2T (n = 57) who did not take statins. The control group included 20 healthy volunteers. The parameters of lipid and carbohydrate metabolism, the degree of insulin resistance (HOMA-IR), the state of the oxidant system (malonic dialdehyde level -MDA), the antioxidant system (the activity of glutathione peroxidase (GPO) and the level of sulfhydryl groups -SH-groups) were evaluated. The statistics was carried out using the Statistica software package, version 8.0. Results. In the 1st group only the levels of LDL cholesterol significantly differed from the control group (P < 0.05). In the 2nd group the levels of total cholesterol and LDL cholesterol were expected to be higher than in the 1st group (P < 0.05) and the control group (P < 0.05). Despite the higher level of fasting glucose in the 2nd group than in the 1st group, HOMA-IR in the 1st group was higher than in the 2nd group (7.48 +/- 1.76 and 7.17 +/- 1.54, respectively, P > 0.05). In the 1st group in comparison with the 2nd group unreliable increase in GPO and SH-groups levels on the background of the increase in MDA levels (P > 0.05) were observed. Conclusions. The use of statins in low doses in AH combined with DM2T was accompanied by a nonsignificant improvement of antioxidant protection parameters on the background of increased insulin resistance and increased activity of lipid peroxidation.