Abstract
The present study aimed to evaluate the protective effects of selenium administration against tacrolimus (Tac) induced lung toxicity and to assess the relation between heme oxygenase 1 (HO-1) and these effects. The study was conducted on 36 Wistar male albino rats equally divided into 4 groups: (1) normal control, (2) Selenium (Sel 0.1mg/kg/day p.o for four weeks), (3) TAC 3mg/ml as single oral dose on 27th day (4) Tac + Sel. Lung tissues, lung homogenate, and bronchoalveolar lavage of the sacrificed animals were investigated biochemically, histopathologically, by immunohistochemistry or by PCR. Tac group showed significantly lower expression of HO-1. Administration of selenium was associated with increased HO-1 expression. Oxidative (malondialdehyde: MDA, reduced glutathione: GSH, superoxide dismutase: SOD, myeloperoxidase: MPO, glutathione peroxidase activity: GPx) and nitrosative stress (Nitric oxide: NO) markers and markers of inflammation (Interleukins: IL1β, 6 and 10) showed changes corresponding to HO-1 levels in rats groups. Tac group showed the highest expression of caspase-3. Selenium exerted protective role against tacrolimus induced lung toxicity.
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