Background: Diabetes is associated with chronic hyperglycaemia, long-term damage, dysfunction, and organ failure. This study aims to evaluate the antidiabetic activity of the twigs of Andrographis paniculata and its toxicological markers on Streptozotocin (STZ)-induced diabetic Albino rats. Methods: A total of thirty rats were randomly divided into five groups of six animals each. Non-diabetic animals were treated with distilled water as non-diabetic sham control group 1, while diabetic animals (group 2, 3, 4 and 5) were treated with 60 mg/kg bw STZ intravenous (iv) and 100 mg/kg body weight (bwt) of metformin orally for group 2, distilled water for group 3, and 250 and 500 mg/kg bwt of Andrograhis paniculata (A. paniculata) for groups 4 and 5, respectively. The animals were dosed for 28 days, after which they were sacrificed. Liver and kidney function tests as well as livid profile tests were used as the biomarkers of toxicological assessment. Fasting blood glucose was carried out weekly. Oral Glucose Tolerance Test (OGTT) was conducted on the 28th day of the antidiabetic assessment. Results: A. paniculata groups 4 and 5 were significant at different doses (p < 0.05) in reducing the blood glucose level in comparison with metformin. There were significant changes in total and direct bilirubin, total protein, potassium, triglyceride and inorganic phosphorus in 500 mg/kg bwt of the treated group in comparison with the metformin and diabetic group groups. A. paniculata at 500 mg/kg bwt is most effective for its antidiabetic and organ protecting effects.
Background Diabetes, a global cause of mortality in developing countries is a chronic disorder affecting the metabolism of macromolecules and has been attributed to the defective production and action of insulin characterized by persistent hyperglycemic properties. This global disorder harms organs of the body such as the liver, kidney and spleen. Medicinal plants such as Hunteria umbellate have been shown to possess hypoglycemic, antioxidative and anti-diabetic properties owing to the high concentration of active phytochemical constituents like flavonoids and alkaloids. The present study seeks to evaluate the hypoglycemic activities of ethanolic seed extract of Hunteria umbellate on streptozotocin-induced diabetes rats. Methods Thirty (30) female experimental rats were randomly divided into five groups with six rats per group and were administered streptozotocin (STZ) and Hunteria umbellate as follows. Group 1 served as control and was given only distilled water, group 2 rats were administered 60 mg/kg STZ; Group 3 was administered 60 mg/kg STZ and 100 mg/kg metformin; group 4 rats were administered 60 mg/kg STZ and 800 mg/kg Hunteria umbellate, group 5 rats 60 mg/kg STZ and 400 mg/kg Hunteria umbellate. The fasting blood glucose level of each rat was measured before sacrifice. Rats were then sacrificed 24 h after the last dose of treatment. Results The results showed that Hunteria umbellate significantly reversed STZ-induced increase in fasting blood glucose and increase in body and organs weight of rats. Hunteria umbellate significantly reversed STZ-induced decrease in antioxidant enzyme in liver, kidney and spleen of rats. Hunteria umbellate significantly reversed STZ-induced increase in oxidative stress markers in liver, kidney and spleen of rats. Conclusion Collectively, our results provide convincing information that inhibition of oxidative stress and regulation of blood glucose level are major mechanisms through which Hunteria umbellate protects against streptozotocin-induced diabketes rats.
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