Abstract
Background: Nicotine can be consumed in many forms, the most common of which is smoking tobacco. Tobacco smoking is a global problem that negatively affects human health. Natural plants are vital antioxidants that may antagonize the toxic effects of smoking. We designed the present study to assess the protective potential of Teucrium polium extract (TPE) on nicotine-induced liver toxicity in male mice. Methods: Twenty-four animals were allocated into four equal groups and daily treated for 21 constitutive days. Control group one received distilled water, group two orally received 100 mg/kg TPE, group three received subcutaneous injections of 2.5 mg/kg nicotine and group four received 100 mg/kg TPE orally then 2.5 mg/kg nicotine subcutaneously after one hour. Result: Nicotine exposure significantly elevated liver enzymes; alanine transaminase (ALT) and aspartate transaminase (AST). The levels of malondialdehyde (MDA) and nitric oxide (NO) were also elevated along with a reduction in glutathione reduced content (GSH), superoxide dismutase (SOD) and catalase (CAT) activity. Treatment with TPE considerably ameliorated the serum levels of liver enzymes, lowered MDA and NO levels, as well as elevated the antioxidant defense system. Also, TPE improved the histological structure and modulated apoptosis caused by nicotine. The current study proved the effectiveness of TPE as a natural antioxidant for the alleviation of nicotine-induced hepatic biochemical and histopathological alterations through attenuating oxidative stress, improving antioxidant systems and abrogating apoptosis.
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