Oxidative stress is elevated in patients with diabetes mellitus and oxidative modification of red cell membrane increases its fragility. Micronutrients with antioxidant effect protect structure and function of biological membranes. In the current study, manganese, copper and zinc, were supplemented in alloxan-induced diabetic rats for a period of 4 weeks. Haematological indices were determined by standard methods and results analyzed using InStat3 Statistical Software. Haemoglobin, packed cell volume, and red blood cell concentrations were 16.91±0.23g/dl, 50.0±1.11% and 5.63±0.32(10 12 /L) in controls 12.43±0.71g/dl, 36.42±1.38% and 4.58±0.23(10 12 /L) in treated unsupplemented group, and 13.84±0.43g/dl, 42.14±1.67% and 5.54±0.32(10 12 /L) in treated and supplemented groups respectively. Mean cell volume, mean cell haematocrit and mean cell haematocrit concentration values were 9.39±0.25fl, 3.15±0.12pg and 0.33±0.01g/L in controls, 8.18±0.46fl, 2.74±0.09pg and 0.34±0.62g/L in the treated unsupplemented group, and 7.99±0.65fl, 2.57±0.18pg and 0.32±0.01g/L in the treated and supplemented group respectively. Activities of superoxide dismutase, glutathione peroxidase and catalase were 2.00±0.17U/mg protein, 46.43±4.25U/mg protein and 59.86±1.08U/mg protein in the controls, 1.67±0.22U/mg protein, 36.88±3.91U/mg protein and 39.86±3.03U/mg protein in the unsupplemented group and 1.61±0.18U/mg protein, 44.86±1.82U/mg protein and 57.14±2.48U/mg protein in the supplemented group respectively. The concentration of malondialdehyde was 1.83±0.16nmol/ml in controls, 2.37±0.19nmol/ml in supplemented group and 1.91±1.14nmol/ml in the supplemented group. It may be concluded from the present study that antioxidant micronutrient improve some haematological and antioxidant indices and reduce lipid peroxidation in alloxan-induced diabetic rats.

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There is increasing evidence that in certain pathology states, the increased production and/or ineffective scavenging of reactive oxygen species (ROS) may play a critical role. Therefore, it seems reasonable that antioxidants can play an important role in the management of these diseases. In the current study, antioxidant vitamins A, C and E were supplemented in alloxan-induced diabetic rats for a period of 28 days. Blood glucose level was assayed by the method of Trinder (1969) and digital bench weigh balance was used to measure the weights. Final blood glucose concentrations were 4.16 ± 0.18 mmo/L in control, 5.94 ± 0.21 mmol/L in diabetic treated not supplemented and 4.56 ± 0.61 mmol/L in diabetic rats supplemented with vitamins. There were statistically significance deference, (P<0.05) between the supplemented and unsupplemented. Finally body weights were 157.57 ± 4.16 g in controls, 143.43 ± 8.70 g in diabetic not supplemented and 187.29±4.30 g in diabetic rats supplemented with vitamins. There were statistically significance difference between the supplemented and unsupplemented groups (P< 0.05). These findings suggest, in addition to oral hypoglycaemic agents, supplementation with antioxidant vitamins may improve glycaemic control and alleviates body wastage in alloxan-induced diabetic rats.

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