Evaluation of the protective effect of Nigella sativa oil’s unsaponifiable fraction in carbon tetrachloride-kidney damage model

Background/Aim: Kidney diseases is a global public health problem. This study was conducted to evaluate the renoprotective effect of the total oil’s unsaponifiable fraction (UF) of a medicinal plant called Nigella sativa. Methods: The extraction of unsaponifiables from the total seed oil of the medicinal plant Nigella sativa was carried out according to the standardized methods of the European Pharmacopoeia (Edition 5.0). Carbon tetrachloride (CCl4) is known to induce kidney toxicity. Acute poisoning of Male albino rats with 1:1 (v/v) mixture of CCl4 and olive oil (3 ml/Kg b.w. of rat by subcutaneous injection) induces considerable kidney pain. Results: Nigella sativa UF is found to be rich in tocopherols, its administration as a curative or preventive treatment to poisoned animals results in a very significant reduction in renal markers (CREA, URE). Histological study shows that kidneys are in better condition than those of intoxicated rats. Conclusion: Measurable biological evidence has been given to the use of such extract as effective substance against kidney diseases. Keywords: CCl4, Renoprotective activity, Nigella sativa, total oil, Unsaponifiable fraction