目的应用人源肝微粒体孵育体系考察直铁线莲宁B的体外代谢。方法将直铁线莲宁B与人肝微粒体共同温孵,用蛋白沉淀法处理样品,采用LC-MS/MS法对代谢产物进行定性和定量分析。色谱条件:Phenomenex Luna C18色谱柱(100 mm×2.0 mm,5μm)...目的应用人源肝微粒体孵育体系考察直铁线莲宁B的体外代谢。方法将直铁线莲宁B与人肝微粒体共同温孵,用蛋白沉淀法处理样品,采用LC-MS/MS法对代谢产物进行定性和定量分析。色谱条件:Phenomenex Luna C18色谱柱(100 mm×2.0 mm,5μm);流动相:乙腈(含0.1%甲酸)-水(含0.1%甲酸),梯度洗脱;流速400μL·min^(-1);进样量10μL。质谱条件:电喷雾离子源,负离子模式检测。结果直铁线莲宁B(化合物1)在人肝微粒孵育体系中可代谢为落叶松脂醇-4-O-β-D-葡萄糖苷(化合物2)和落叶松脂醇-4′-O-β-D-葡萄糖苷(化合物3)。结论在人肝微粒孵育体系中,直铁线莲宁B可以部分代谢为抗流感活性更强的化合物2,提示在体内可能通过原型药和活性代谢物共同发挥抗流感药效,为该化合物药效评价提供了重要依据。展开更多
OBJECTIVE: To study the antiviral activities of clemastanin B(CB), epigoitrin, phenylpropanoids portion(PEP) and the mixture of phenylpropanoids, alkaloids and organic acid fractions(PEP+ALK+OA)from Banlangen(Radix Is...OBJECTIVE: To study the antiviral activities of clemastanin B(CB), epigoitrin, phenylpropanoids portion(PEP) and the mixture of phenylpropanoids, alkaloids and organic acid fractions(PEP+ALK+OA)from Banlangen(Radix Isatidis).METHODS: The experiment consisted of four parts:therapeutic action, prophylaxsis action, inhibition of virus attachment, and direct virucidal action. Cytopathic effect(CPE) and 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium(MTT) were used to assess antiviral activity.RESULTS: CB, epigoitrin, PEP and PEP + ALK + OA fractions from Banlangen(Radix Isatidis) extract significantly increased the viability of MDCK cells pre-infected with the virus compared with the virus control group in all the dilutions(P < 0.01). Pretreated with either pure compounds or chemical frac-tions of Banlangen(Radix Isatidis) extract in all the dilutions significantly improved the viability of MDCK cells(P < 0.01). The inhibition of virus absorption to the host cells by CB, epigoitrin and PEP was in a dose dependent manner.CONCLUSION: CB, epigoitrin, PEP and PEP+ALK+OA exert their anti-influenza activity by inhibiting the virus multiplication, prophylaxsis and blocking the virus attachment. The primary mode of action of PEP and PEP + ALK + OA is the inhibition of virus replication. The inhibitory effects on virus attachment and multiplication are the main modes for epigoitrin.展开更多
文摘目的应用人源肝微粒体孵育体系考察直铁线莲宁B的体外代谢。方法将直铁线莲宁B与人肝微粒体共同温孵,用蛋白沉淀法处理样品,采用LC-MS/MS法对代谢产物进行定性和定量分析。色谱条件:Phenomenex Luna C18色谱柱(100 mm×2.0 mm,5μm);流动相:乙腈(含0.1%甲酸)-水(含0.1%甲酸),梯度洗脱;流速400μL·min^(-1);进样量10μL。质谱条件:电喷雾离子源,负离子模式检测。结果直铁线莲宁B(化合物1)在人肝微粒孵育体系中可代谢为落叶松脂醇-4-O-β-D-葡萄糖苷(化合物2)和落叶松脂醇-4′-O-β-D-葡萄糖苷(化合物3)。结论在人肝微粒孵育体系中,直铁线莲宁B可以部分代谢为抗流感活性更强的化合物2,提示在体内可能通过原型药和活性代谢物共同发挥抗流感药效,为该化合物药效评价提供了重要依据。
基金the National Natural Science Foundation of China Grant(No.81073023)the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(No.ysxk-2010)2013 Program sponsored for scientific innovation research of college graduate in Jiangsu province(No.CXZZ13_0631)
文摘OBJECTIVE: To study the antiviral activities of clemastanin B(CB), epigoitrin, phenylpropanoids portion(PEP) and the mixture of phenylpropanoids, alkaloids and organic acid fractions(PEP+ALK+OA)from Banlangen(Radix Isatidis).METHODS: The experiment consisted of four parts:therapeutic action, prophylaxsis action, inhibition of virus attachment, and direct virucidal action. Cytopathic effect(CPE) and 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium(MTT) were used to assess antiviral activity.RESULTS: CB, epigoitrin, PEP and PEP + ALK + OA fractions from Banlangen(Radix Isatidis) extract significantly increased the viability of MDCK cells pre-infected with the virus compared with the virus control group in all the dilutions(P < 0.01). Pretreated with either pure compounds or chemical frac-tions of Banlangen(Radix Isatidis) extract in all the dilutions significantly improved the viability of MDCK cells(P < 0.01). The inhibition of virus absorption to the host cells by CB, epigoitrin and PEP was in a dose dependent manner.CONCLUSION: CB, epigoitrin, PEP and PEP+ALK+OA exert their anti-influenza activity by inhibiting the virus multiplication, prophylaxsis and blocking the virus attachment. The primary mode of action of PEP and PEP + ALK + OA is the inhibition of virus replication. The inhibitory effects on virus attachment and multiplication are the main modes for epigoitrin.