Objective:To evaluate the effects of wedelolactone,a major flavonoid from Vietnamese Eclipta prostrata(L)L.,on inflammation and insulin resistance.Methods:Wedelolactone was extracted from the leaves of Vietnamese Ecli...Objective:To evaluate the effects of wedelolactone,a major flavonoid from Vietnamese Eclipta prostrata(L)L.,on inflammation and insulin resistance.Methods:Wedelolactone was extracted from the leaves of Vietnamese Eclipta prostrata(L.)L.with methanol by Soxhlet.The effects of wedelolactone on lipopolysaccharide(LPS)-induced cytokine production,reactive oxygen species(ROS)generation,and nicotinamide adenine dinucleotide phosphate(NADPH)oxidase activities in Raw 264.7 cells were measured by enzyme-linked immunosorbent assay(ELISA),specific immunofluorescent dyes and luminometric analysis,respectively.In addition,its effects on glucose uptake and the protein expression of insulin receptor substrate 1(IRS1)and glucose transporter 4(GLUT4)were examined in 3T3-L1 cells by immunofluorescent dyes and Western blot.Results:Wedelolactone at 30μg/mL significantly inhibited LPS-induced production of tumor necrosis factor-α,interleukin(IL)-6,and IL-8(P<0.01)with no noticeable effects on IL-10 level.It also reduced ROS generation and NADPH oxidase activities in LPS-stimulated Raw 264.7 cells(P<0.01).Furthermore,wedelolactone showed anti-insulin resistance activity,as evidenced by improved glucose uptake and the upregulated expression of IRS1 and GLUT4 in 3T3-L1 cells(P<0.01).Conclusions:Wedelolactone exhibits anti-inflammation and anti-insulin resistance effects,which may be used for the treatment of diabetes and inflammation-associated diseases.展开更多
目的:探讨针刺对2型糖尿病(T2DM)大鼠肝组织胰岛素受体底物1和2基因(IRS1和2mRNA)表达的影响。方法:给食源性肥胖大鼠腹腔注射小剂量链脲佐菌素(STZ)(25mg/kg)造模成T2DM大鼠,随机分为针刺组、优降糖组和模型组,处理4周后,用快速血糖仪...目的:探讨针刺对2型糖尿病(T2DM)大鼠肝组织胰岛素受体底物1和2基因(IRS1和2mRNA)表达的影响。方法:给食源性肥胖大鼠腹腔注射小剂量链脲佐菌素(STZ)(25mg/kg)造模成T2DM大鼠,随机分为针刺组、优降糖组和模型组,处理4周后,用快速血糖仪检测空腹血糖(FBS)、用放免法检测空腹胰岛素(FINS)、用实时定量荧光PCR(real-tim e RT PCR)法检测肝组织IRS1和2mRNA表达,并与正常组大鼠进行对照。结果:针刺组和优降糖组FBS和FINS比模型组显著降低(P<0.05);模型组IRS1mRNA相对含量是正常组的25%,针刺组为正常组的2.83倍,优降糖组为正常组的1.23倍。模型组IRS2mRNA相对含量为正常组的2.19倍,针刺组IRS2mRNA相对含量为正常组的4.84%,优降糖组IRS2mRNA相对含量为正常组的4.59倍。结论:肝组织IRS1和2mRNA表达异常可能是T2DM的发病机制之一,针刺和优降糖均可上调T2DM大鼠肝组织IRS1mRNA的表达,针刺对T2DM大鼠肝组织IRS1 mRNA表达的上调作用优于优降糖;针刺具有显著抑制T2DM大鼠肝组织IRS2mRNA表达的作用,而优降糖无此作用。展开更多
基金support from the Fund of The Key Laboratory of Enzyme and Protein Technology,VNU University of Science(KLEPT:22.02).
文摘Objective:To evaluate the effects of wedelolactone,a major flavonoid from Vietnamese Eclipta prostrata(L)L.,on inflammation and insulin resistance.Methods:Wedelolactone was extracted from the leaves of Vietnamese Eclipta prostrata(L.)L.with methanol by Soxhlet.The effects of wedelolactone on lipopolysaccharide(LPS)-induced cytokine production,reactive oxygen species(ROS)generation,and nicotinamide adenine dinucleotide phosphate(NADPH)oxidase activities in Raw 264.7 cells were measured by enzyme-linked immunosorbent assay(ELISA),specific immunofluorescent dyes and luminometric analysis,respectively.In addition,its effects on glucose uptake and the protein expression of insulin receptor substrate 1(IRS1)and glucose transporter 4(GLUT4)were examined in 3T3-L1 cells by immunofluorescent dyes and Western blot.Results:Wedelolactone at 30μg/mL significantly inhibited LPS-induced production of tumor necrosis factor-α,interleukin(IL)-6,and IL-8(P<0.01)with no noticeable effects on IL-10 level.It also reduced ROS generation and NADPH oxidase activities in LPS-stimulated Raw 264.7 cells(P<0.01).Furthermore,wedelolactone showed anti-insulin resistance activity,as evidenced by improved glucose uptake and the upregulated expression of IRS1 and GLUT4 in 3T3-L1 cells(P<0.01).Conclusions:Wedelolactone exhibits anti-inflammation and anti-insulin resistance effects,which may be used for the treatment of diabetes and inflammation-associated diseases.
文摘目的:探讨针刺对2型糖尿病(T2DM)大鼠肝组织胰岛素受体底物1和2基因(IRS1和2mRNA)表达的影响。方法:给食源性肥胖大鼠腹腔注射小剂量链脲佐菌素(STZ)(25mg/kg)造模成T2DM大鼠,随机分为针刺组、优降糖组和模型组,处理4周后,用快速血糖仪检测空腹血糖(FBS)、用放免法检测空腹胰岛素(FINS)、用实时定量荧光PCR(real-tim e RT PCR)法检测肝组织IRS1和2mRNA表达,并与正常组大鼠进行对照。结果:针刺组和优降糖组FBS和FINS比模型组显著降低(P<0.05);模型组IRS1mRNA相对含量是正常组的25%,针刺组为正常组的2.83倍,优降糖组为正常组的1.23倍。模型组IRS2mRNA相对含量为正常组的2.19倍,针刺组IRS2mRNA相对含量为正常组的4.84%,优降糖组IRS2mRNA相对含量为正常组的4.59倍。结论:肝组织IRS1和2mRNA表达异常可能是T2DM的发病机制之一,针刺和优降糖均可上调T2DM大鼠肝组织IRS1mRNA的表达,针刺对T2DM大鼠肝组织IRS1 mRNA表达的上调作用优于优降糖;针刺具有显著抑制T2DM大鼠肝组织IRS2mRNA表达的作用,而优降糖无此作用。
