Primary hepatocytes were obtained by the inverse perfusion method improved on Seglen two-step perfusion in situ.
In the presence of S. nigrum aqueous extracts (100 μg/mL), no hepatocytic damage was observed in cells treated with ethanol, compared with the model group, and GSTA1 (p < 0.01) was more sensitive than alanine aminotransferase and aspartate aminotransferase (p < 0.05). Mice that received S. nigrum aqueous extracts (150 mg/kg) with ethanol showed marked attenuation of ethanol-induced hepatotoxicity, as evidenced by significant reductions of serum transaminases (p < 0.01), and variation of hepatic oxidative indices (p < 0.05) and GSTA1 (p < 0.05), compared with the model group and mice that received S. nigrum aqueous extracts (200 mg/kg). All the detection indexes were significantly different (p < 0.01) from those of the model group, and the protective effects were almost the same as that of the positive drug group.
These results suggested that S. nigrum has hepatoprotective effects against ethanol-induced injury both in vitro and in vivo, and can protect the integrity of hepatocytes and thus reduce the release of liver GSTA1, which contributes to improved liver detoxification.
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