Two new lignans with dibenzocycloheptadiene skelectons have been synthesized by intramolecular nonphenolic oxidative coupling and rearrangement. The structures of these products have been identified by MS, UV, IR and ...Two new lignans with dibenzocycloheptadiene skelectons have been synthesized by intramolecular nonphenolic oxidative coupling and rearrangement. The structures of these products have been identified by MS, UV, IR and NMR spectra.展开更多
Three new Schizandrin analogues with dibenzocycloheptatriene skeletons have been synthesized. Their structures were identified by MS, UV, IR and NMR spectral data.
OBJECTIVE:To explore the synergistic effect of deoxyribonucleaseⅠ(DNaseⅠ)knockdown combined with Schizandrin A(Sch A)in protecting islet beta-cells(β-cells)from apoptosis under high-glucose(HG)conditions.METHODS:Th...OBJECTIVE:To explore the synergistic effect of deoxyribonucleaseⅠ(DNaseⅠ)knockdown combined with Schizandrin A(Sch A)in protecting islet beta-cells(β-cells)from apoptosis under high-glucose(HG)conditions.METHODS:The concentration of Sch A was detected by Cell Counting Kit-8(CCK-8).High glucose-cultured rat insulinoma beta cell line(RIN-M5F)cells were treated with Sch A and transfected with DNaseⅠsmall interfering RNA(siRNA).Cell apoptosis rate and apoptosis-related protein level were examined by flow cytometry and Western blot method respectively.In addition,Na^(+)-K^(+)-adenosine triphosphatease(Na^(+)-K^(+)-ATPase)and Ca^(2+)-Mg^(2+)-ATPase activity,cell membrane potential,and intracellular Ca^(2+)concentration was also examined respectively.RESULTS:Our study revealed that HG stimulation can cause a significant increase in DNaseⅠlevel and cell apoptosis rate.However,Sch A combined with DNaseⅠknockdown can significantly decrease the cell apoptosis rate and apoptosis-related protein levels such as BAX(P<0.05)and Caspase-3(P<0.01).In addition,we also found that the combination of Sch A and DNaseⅠknockdown can dramatically increase cell membrane potential level,Na+-K+-ATPase,and Ca^(2+)-Mg^(2+)-ATPase activity.Meanwhile,intracellular Ca^(2+)concentration was also found to be significantly decreased by the synergistic effect of Sch A and DNaseⅠknockdown.CONCLUSION:Overall,our study reveals a synergistic effect of Sch A and DNaseⅠknockdown in protectingβ-cells from HG-induced apoptosis.展开更多
目的建立高效液相色谱-电雾式检测器法同时测定心荣颗粒中黄芪甲苷、麦冬皂苷D、地黄苷D、五味子醇甲、芍药苷、桂皮醛的含量。方法色谱柱为Atlantis PREMIER BEH C 18色谱柱(250 mm×4.6 mm,5μm);流动相以甲醇(A)-0.1%乙酸水溶液...目的建立高效液相色谱-电雾式检测器法同时测定心荣颗粒中黄芪甲苷、麦冬皂苷D、地黄苷D、五味子醇甲、芍药苷、桂皮醛的含量。方法色谱柱为Atlantis PREMIER BEH C 18色谱柱(250 mm×4.6 mm,5μm);流动相以甲醇(A)-0.1%乙酸水溶液(B)梯度洗脱,柱温35℃,流速1 mL·min^(-1),进样量10μL。电喷雾检测器的雾化器温度为35℃,检测频率为10 Hz。结果黄芪甲苷、麦冬皂苷D、地黄苷D、五味子醇甲、芍药苷、桂皮醛在本文浓度范围内均呈良好线性关系,且平均加样回收率分别为黄芪甲苷98.9%(RSD为0.8%,n=9)、麦冬皂苷D 98.4%(RSD为1.4%,n=9)、地黄苷D 98.7%(RSD为1.4%,n=9)、五味子醇甲99.4%(RSD为0.7%,n=9)、芍药苷100.1%(RSD为0.9%,n=9)、桂皮醛101.3%(RSD为0.6%,n=9)。结论该方法可用于心荣颗粒中黄芪甲苷、麦冬皂苷D、地黄苷D、五味子醇甲、芍药苷、桂皮醛的含量测定。展开更多
文摘Two new lignans with dibenzocycloheptadiene skelectons have been synthesized by intramolecular nonphenolic oxidative coupling and rearrangement. The structures of these products have been identified by MS, UV, IR and NMR spectra.
文摘Three new Schizandrin analogues with dibenzocycloheptatriene skeletons have been synthesized. Their structures were identified by MS, UV, IR and NMR spectral data.
基金the Natural Science Foundation of China:the Protective Effect of Schizandrin A toβCell Apoptosis by DNaseⅠin Type 2 Diabetes(No.81803909)。
文摘OBJECTIVE:To explore the synergistic effect of deoxyribonucleaseⅠ(DNaseⅠ)knockdown combined with Schizandrin A(Sch A)in protecting islet beta-cells(β-cells)from apoptosis under high-glucose(HG)conditions.METHODS:The concentration of Sch A was detected by Cell Counting Kit-8(CCK-8).High glucose-cultured rat insulinoma beta cell line(RIN-M5F)cells were treated with Sch A and transfected with DNaseⅠsmall interfering RNA(siRNA).Cell apoptosis rate and apoptosis-related protein level were examined by flow cytometry and Western blot method respectively.In addition,Na^(+)-K^(+)-adenosine triphosphatease(Na^(+)-K^(+)-ATPase)and Ca^(2+)-Mg^(2+)-ATPase activity,cell membrane potential,and intracellular Ca^(2+)concentration was also examined respectively.RESULTS:Our study revealed that HG stimulation can cause a significant increase in DNaseⅠlevel and cell apoptosis rate.However,Sch A combined with DNaseⅠknockdown can significantly decrease the cell apoptosis rate and apoptosis-related protein levels such as BAX(P<0.05)and Caspase-3(P<0.01).In addition,we also found that the combination of Sch A and DNaseⅠknockdown can dramatically increase cell membrane potential level,Na+-K+-ATPase,and Ca^(2+)-Mg^(2+)-ATPase activity.Meanwhile,intracellular Ca^(2+)concentration was also found to be significantly decreased by the synergistic effect of Sch A and DNaseⅠknockdown.CONCLUSION:Overall,our study reveals a synergistic effect of Sch A and DNaseⅠknockdown in protectingβ-cells from HG-induced apoptosis.
