The clinical benefit of combination therapy is significant,but it is not easy to define the mechanism of complexity and diversity.Previous studies illustrate that phillygenin(Phi)binds in the allosteric inhibit pocket...The clinical benefit of combination therapy is significant,but it is not easy to define the mechanism of complexity and diversity.Previous studies illustrate that phillygenin(Phi)binds in the allosteric inhibit pocket of protein kinase B(AKT),and swertiamarin(Swe)acts on the pleckstrin homology(PH)domain of AKT.However,the combined synergistic effect of relieving the inflammatory response has yet to be elucidated.Based on high sensitivity,specificity and fast-responsibility fluorescent sensors,the Förster resonance energy transfer(FRET)technique offers a route to provide clear insights into physiological and pathological processes.In the study,molecular docking,the fluorescent probes of Phi and Swe for FRET were designed and synthesized.FRET analysis shown that Swe and Phi concurrently acted on the PH domain and allosterically inhibited pocket of AKT,respectively.The combination of Swe and Phi significantly increased the heat stability of AKT and decreased protease-induced degeneration.In lipopolysaccharides(LPS)-induced mice and cells,the combination arrested AKT activation,nuclear factor kappa-B(NF-κB)phosphorylation,and the expression of tumor necrosis factor-α(TNF-α),interleukin(IL)-6 and IL-8.In conclusion,FRET revealed Phi and Swe concurrently targeted AKT on different domains and the combination of Phi and Swe enhanced the anti-inflammatory effect.展开更多
目的研究连翘苷元调控TLR4介导的NF-κB信号通路的活化对骨关节炎大鼠软组织损伤和基质降解的影响。方法建立骨关节炎大鼠模型,将大鼠随机分为6组:健康对照组,模型组,连翘苷元低、中、高剂量组和双醋瑞因组进行后续实验;苏木素-伊红染...目的研究连翘苷元调控TLR4介导的NF-κB信号通路的活化对骨关节炎大鼠软组织损伤和基质降解的影响。方法建立骨关节炎大鼠模型,将大鼠随机分为6组:健康对照组,模型组,连翘苷元低、中、高剂量组和双醋瑞因组进行后续实验;苏木素-伊红染色和番红O-固绿染色检测大鼠骨关节病理损伤程度;ELISA检测炎症因子的含量;蛋白免疫印迹检测半胱氨酸蛋白酶-3、半胱氨酸蛋白酶-9、聚集蛋白聚糖、基质金属蛋白酶13、Ⅱ型胶原蛋白、Toll样受体4、髓样分化因子88、核因子κB蛋白表达水平。结果与模型组相比较,连翘苷元中、高剂量组和双醋瑞因组骨关节病理损伤程度明显改善,Caspase-3、Caspase-9蛋白水平显著降低(P<0.05),Bcl-2/Bax比值显著升高(P<0.05),Aggrecan、type II collagen(ColⅡ)蛋白水平显著升高(P<0.05),MMP-13蛋白水平显著降低(P<0.05),IL-6、IL-17、TNF-α、MCP-1含量显著降低(P<0.05),TLR-4、MyD88、NF-κB p65蛋白水平显著降低(P<0.05)。结论连翘苷元抑制TLR4介导的NF-κB信号通路的活化对骨关节炎大鼠软组织损伤和基质降解具有修复作用。展开更多
利用高效液相色谱-电喷雾/质谱(HPLC-ESI/MS)分析鉴定不同产地的连翘,包括青翘和老翘中主要有效成分连翘苷、连翘酯苷A和连翘酯素的含量,以此探讨各产地连翘品种主要成分之间的变化及差异程度,为建立野生连翘中药资源综合评价提供科学...利用高效液相色谱-电喷雾/质谱(HPLC-ESI/MS)分析鉴定不同产地的连翘,包括青翘和老翘中主要有效成分连翘苷、连翘酯苷A和连翘酯素的含量,以此探讨各产地连翘品种主要成分之间的变化及差异程度,为建立野生连翘中药资源综合评价提供科学依据。通过采集中国3个主产地野生连翘6个样品,选用Hypersil Gold C18色谱柱(100.0 mm×2.1 mm,5μm),柱温30℃,以甲醇-水溶液(含体积分数为0.01%甲酸)为流动相进行梯度洗脱,流速为0.55 m L/min,进样量10μL;加热式电喷雾电离源为正、负离子模式监测,源喷雾电压为3.0 k V,鞘气流速为8.0 L/min,离子传输毛细管温度为320℃。研究结果表明:连翘酯苷A和连翘苷两种化学成分的峰面积和浓度在测定浓度范围内均具有良好的线性关系,加样平均回收率分别为113.4%和90.5%,相对标准偏差分别为8.20%和8.30%。展开更多
基金supported by the National Natural Science Foundation of China(No.81973449).
文摘The clinical benefit of combination therapy is significant,but it is not easy to define the mechanism of complexity and diversity.Previous studies illustrate that phillygenin(Phi)binds in the allosteric inhibit pocket of protein kinase B(AKT),and swertiamarin(Swe)acts on the pleckstrin homology(PH)domain of AKT.However,the combined synergistic effect of relieving the inflammatory response has yet to be elucidated.Based on high sensitivity,specificity and fast-responsibility fluorescent sensors,the Förster resonance energy transfer(FRET)technique offers a route to provide clear insights into physiological and pathological processes.In the study,molecular docking,the fluorescent probes of Phi and Swe for FRET were designed and synthesized.FRET analysis shown that Swe and Phi concurrently acted on the PH domain and allosterically inhibited pocket of AKT,respectively.The combination of Swe and Phi significantly increased the heat stability of AKT and decreased protease-induced degeneration.In lipopolysaccharides(LPS)-induced mice and cells,the combination arrested AKT activation,nuclear factor kappa-B(NF-κB)phosphorylation,and the expression of tumor necrosis factor-α(TNF-α),interleukin(IL)-6 and IL-8.In conclusion,FRET revealed Phi and Swe concurrently targeted AKT on different domains and the combination of Phi and Swe enhanced the anti-inflammatory effect.
文摘目的研究连翘苷元调控TLR4介导的NF-κB信号通路的活化对骨关节炎大鼠软组织损伤和基质降解的影响。方法建立骨关节炎大鼠模型,将大鼠随机分为6组:健康对照组,模型组,连翘苷元低、中、高剂量组和双醋瑞因组进行后续实验;苏木素-伊红染色和番红O-固绿染色检测大鼠骨关节病理损伤程度;ELISA检测炎症因子的含量;蛋白免疫印迹检测半胱氨酸蛋白酶-3、半胱氨酸蛋白酶-9、聚集蛋白聚糖、基质金属蛋白酶13、Ⅱ型胶原蛋白、Toll样受体4、髓样分化因子88、核因子κB蛋白表达水平。结果与模型组相比较,连翘苷元中、高剂量组和双醋瑞因组骨关节病理损伤程度明显改善,Caspase-3、Caspase-9蛋白水平显著降低(P<0.05),Bcl-2/Bax比值显著升高(P<0.05),Aggrecan、type II collagen(ColⅡ)蛋白水平显著升高(P<0.05),MMP-13蛋白水平显著降低(P<0.05),IL-6、IL-17、TNF-α、MCP-1含量显著降低(P<0.05),TLR-4、MyD88、NF-κB p65蛋白水平显著降低(P<0.05)。结论连翘苷元抑制TLR4介导的NF-κB信号通路的活化对骨关节炎大鼠软组织损伤和基质降解具有修复作用。
文摘利用高效液相色谱-电喷雾/质谱(HPLC-ESI/MS)分析鉴定不同产地的连翘,包括青翘和老翘中主要有效成分连翘苷、连翘酯苷A和连翘酯素的含量,以此探讨各产地连翘品种主要成分之间的变化及差异程度,为建立野生连翘中药资源综合评价提供科学依据。通过采集中国3个主产地野生连翘6个样品,选用Hypersil Gold C18色谱柱(100.0 mm×2.1 mm,5μm),柱温30℃,以甲醇-水溶液(含体积分数为0.01%甲酸)为流动相进行梯度洗脱,流速为0.55 m L/min,进样量10μL;加热式电喷雾电离源为正、负离子模式监测,源喷雾电压为3.0 k V,鞘气流速为8.0 L/min,离子传输毛细管温度为320℃。研究结果表明:连翘酯苷A和连翘苷两种化学成分的峰面积和浓度在测定浓度范围内均具有良好的线性关系,加样平均回收率分别为113.4%和90.5%,相对标准偏差分别为8.20%和8.30%。
