A new depsidone, diffractione A （1）, as well as six known phenolic compounds （2-7） were isolated from Usnea diffracta. Their structures were elucidated by 1D and 2D NMR spectroscopy together with HRESIMS analysis....A new depsidone, diffractione A （1）, as well as six known phenolic compounds （2-7） were isolated from Usnea diffracta. Their structures were elucidated by 1D and 2D NMR spectroscopy together with HRESIMS analysis. All components were obtained for the first time from U. diffracta.展开更多
Objective: To investigated the hematological, antioxidant and protective performance of Usnea longissima (U. longissima) on CCl4 induced hepatotoxicity in experimental animals. Methods: Hepatotoxicity was induced by C...Objective: To investigated the hematological, antioxidant and protective performance of Usnea longissima (U. longissima) on CCl4 induced hepatotoxicity in experimental animals. Methods: Hepatotoxicity was induced by CCl4 (1 mL/kg body weigt 1:1 CCl4 i.p.), ethanolic U. longissima extracts at a doses (200 and 400 mg/kg body weigt) were administered to and compared with Silymarin (25 mg/kg body weigt) and hematological, antioxidant and enzymatic, non-enzymatic parameters were assessed through the liver functions test. All the observation was also supplemented with histopathological examination of liver sections. Results: Phytochemical investigation showed that ethanolic extract contains poly phenolic compounds tannins, flavonoids, alkaloids and saponins and acute toxicity study shows that ethanolic extract was safe up to 2000 mg/kg body weight. The toxicant induced a rise in the plasma enzyme levels of ALT, AST, ALP and total bilirubin level. This increased level was significantly decreased by the extract at 400 mg/kg body weight than 200 mg/kg body weight. The animals were prevented (partly or fully) which was showed in the histopathological changes using ethonolic U. longissima extract. Conclusions: The outcome of this study reveals that, there is a powerful antioxidant and hepatoprotective activity of U. longissima. It is believed that the present constituents are responsible for courting the hepatic disease and alternative components have the power to act as free radical scavenging properties.展开更多
基金supported by the National 863 Program of China(No.2007AA09Z403)National Key Technology Research and Development Program of China(No.2007BAI37B05)Natural Science Foundation of Gansu Province(No.0710RJZA120).
文摘A new depsidone, diffractione A （1）, as well as six known phenolic compounds （2-7） were isolated from Usnea diffracta. Their structures were elucidated by 1D and 2D NMR spectroscopy together with HRESIMS analysis. All components were obtained for the first time from U. diffracta.
文摘Objective: To investigated the hematological, antioxidant and protective performance of Usnea longissima (U. longissima) on CCl4 induced hepatotoxicity in experimental animals. Methods: Hepatotoxicity was induced by CCl4 (1 mL/kg body weigt 1:1 CCl4 i.p.), ethanolic U. longissima extracts at a doses (200 and 400 mg/kg body weigt) were administered to and compared with Silymarin (25 mg/kg body weigt) and hematological, antioxidant and enzymatic, non-enzymatic parameters were assessed through the liver functions test. All the observation was also supplemented with histopathological examination of liver sections. Results: Phytochemical investigation showed that ethanolic extract contains poly phenolic compounds tannins, flavonoids, alkaloids and saponins and acute toxicity study shows that ethanolic extract was safe up to 2000 mg/kg body weight. The toxicant induced a rise in the plasma enzyme levels of ALT, AST, ALP and total bilirubin level. This increased level was significantly decreased by the extract at 400 mg/kg body weight than 200 mg/kg body weight. The animals were prevented (partly or fully) which was showed in the histopathological changes using ethonolic U. longissima extract. Conclusions: The outcome of this study reveals that, there is a powerful antioxidant and hepatoprotective activity of U. longissima. It is believed that the present constituents are responsible for courting the hepatic disease and alternative components have the power to act as free radical scavenging properties.
