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  • Title: Protective effect of thymoquinone against diazinon-induced hematotoxicity, genotoxicity and immunotoxicity in rats.
    Author: Danaei GH, Karami M.
    Journal: Environ Toxicol Pharmacol; 2017 Oct; 55():217-222. PubMed ID: 28938193.
    Abstract:
    Several studies have shown that oxidative stress and cell damage can occur in the very early stages of diazinon (DZN) exposure. The present study was designed to determine the beneficial effect of thymoquinone (Thy), the main component of Nigella sativa (black seed or black cumin) against DZN immunotoxicity, hematotoxicity and genotoxicity in rats. In the present experimental study, 48 male Wistar rats were randomly divided into six groups, (eight per group) as follows: control (receiving corn oil as the DZN solvent), DZN (20mg/kg), Thy (10mg/kg), Thy (2.5mg/kg)+DZN, Thy (5mg/kg)+DZN and Thy (10mg/kg)+DZN. After four weeks of treatment, the hematological parameters of red blood cells (RBCs), white blood cells (WBCs), hemoglobin (Hb), hematocrit (Hct) and platelets (PLTs) were evaluated. The evaluation of genotoxicity was carried out using the micronucleus assay. For measurement of cytokine production, interferon gamma (IFN-γ), interleukin 10 (IL10) and interleukin 4 (IL4) were chosen as immunotoxicity indicators of DZN toxicity. DZN was found to decrease RBCs, WBCs, Hb, Hct, PLTs, butyrl- and acetyl-cholinesterase activity and I FN-γ and increased the micronucleus indices of IL10 and IL4 as compared with the control group. Treatment with Thy reduced DZN hematotoxicity and immunotoxicity, but, significantly, did not prevent genotoxicity. This study showed that Thy (without the significant effect on genotoxicity) decreased the hematological toxicity, immunotoxicity and butyrl and acetyl cholinesterase activity induced by DZN. The success of Thy supplementation against DZN toxicity can be attributed to the antioxidant effects of its constituents.
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