Protective effect of Tetracera scandens L.leaf extract against CCl_4-induced acute liver injury in rats

Objective:To investigate the protective potential of ethanolic extracts of Tetracera scandens L.(T.scandens) against CCl_4 induced oxidative stress in liver tissues.Methods:Dried leaf powder of T.scandens was extracted with ethanol and concentrated to yield a dry residue.Rats were administered with 100 mg/kg of ethanolic extracts orally once daily for one week.Animals were subsequently administered with a single dose of CCl_4(I mL/kg body weight,intraperitoneal injection).Various assays,such as serum levels of alanine aminotransferase,aspartate aminotransferase,lipid peroxidation,protein oxidation(carbonyl protein group),tumor necrosis factor alpha,catalase,superoxide dismutase,and glutathione peroxidase,were used to assess damage caused by CCl_4 and the protective effects of the ethanol extract on liver tissues.Results:Hepatotoxicity induced by CCl_4 was evidenced by a significant increase in serum aspartate aminotransferase and alanine aminotransferase level,lipid peroxidation,protein carbonyl group,and tumor necrosis factor alpha,as well as decreased activity of the hepatic antioxidant enzymes(catalase.superoxide dismutase.and glutathione peroxidase).Treatment with ethanolic T.scandens extracts prevented all of these typically observed changes in CCl_4-treated rats.Conclusions:Our findings indicate that T.scandens has a significant protective effect against CCl_4 induced hepatotoxicity in rat.which may be due to its antioxidant properties.

Ethanol extracts of Scutellaria baicalensis protect against lipopolysaccharide-induced acute liver injury in mice

Objective: To investigated the protective potential of ethanol extracts of Scutellaria baicalensis(S. baicalensis) against lipopolysaccharide(LPS)-induced liver injury. Methods: Dried roots of S. baicalensis were extracted with ethanol and concentrated to yield a dry residue. Mice were administered 200 mg/kg of the ethanol extracts orally once daily for one week. Animals were subsequently administered a single dose of LPS(5 mg/kg of body weight, intraperitoneal injection). Both protein and m RNA levels of cytokines, such as tumor necrosis factor alpha, interleukin-1β, and interleukin-6 in liver tissues were evaluated by ELISA assay and quantitative PCR. C yclooxygenase-2, inducible nitric oxide synthase, and nuclear factor-κB protein levels in liver tissues were analyzed by western blotting. Results: Liver injury induced by LPS signifi cantly increased necrosis factor alpha, interleukin-1β, interleukin-6, cyclooxygenase-2, inducible nitric oxide synthase, and nuclear factor-κB in liver tissues. Treatment with ethanol extracts of S. baicalensis prevented all of these observed changes associated with LPS-induced injury in liver mice.Conclusions: Our study showed that S. baicalensis is potentially protective against LPS-induced liver injury in mice.