Rho-associated kinase（ROCK） is a key regulatory protein involved in inflammatory secretion in microglia in the central nervous system.Our previous studies showed that ROCK inhibition enhances phagocytic activity in ...Rho-associated kinase（ROCK） is a key regulatory protein involved in inflammatory secretion in microglia in the central nervous system.Our previous studies showed that ROCK inhibition enhances phagocytic activity in microglia through the extracellular signal-regulated kinase（ERK） signaling pathway,but its effect on microglial migration was unknown.Therefore,in this study,we investigated the effects of the ROCK inhibitors Y27632 and fasudil on the migratory activity of primary cultured microglia isolated from the spinal cord,and we examined the underlying mechanisms.The microglia were treated with Y27632,fasudil and/or the ERK inhibitor U0126.Cellular morphology was observed by immunofluorescence.Transwell chambers were used to assess cell migration.ERK levels were measured by incell western blot assay.Y27632 and fasudil increased microglial migration,and the microglia were irregularly shaped and had many small processes.These inhibitors also upregulated the levels of phosphorylated ERK protein.The ERK inhibitor U0126 suppressed these effects of Y27632 and fasudil.These findings suggest that the ROCK inhibitors Y27632 and fasudil promote microglial migration in the spinal cord through the ERK signaling pathway.展开更多
目的构建以KRAS为靶标的抗结肠癌药物筛选系统,为抗结肠癌药物筛选提供新的技术手段。方法首先选取细胞系并确定系统的技术参数,构建以KRAS为靶标的抗结肠癌药物筛选系统,设计实验验证筛选系统的有效性;而后将构建的筛选系统初步应用,...目的构建以KRAS为靶标的抗结肠癌药物筛选系统,为抗结肠癌药物筛选提供新的技术手段。方法首先选取细胞系并确定系统的技术参数,构建以KRAS为靶标的抗结肠癌药物筛选系统,设计实验验证筛选系统的有效性;而后将构建的筛选系统初步应用,筛选化合物库Z183593-L1200,并对筛选结果进行验证,验证筛选系统的可行性。结果完成筛选系统构建后,通过筛选系统(in-cell Western blot)测得的Hce8693和T47D细胞的KRAS表达差异与普通Western blot一致,筛选系统测定的siRNA系统的敲低效率与普通Western blot亦一致,筛选系统的有效性得到初步验证。筛选激酶抑制剂化合物库Z183593-L1200后,选取活性最好的化合物PF-04691502进行验证;浓度梯度实验显示,随着PF-04691502浓度升高则KRAS胞内含量降低,KRAS胞内含量对PF-04691502浓度呈梯度依赖性;细胞增殖实验结果显示PF-04691502对Hce8693细胞的半数有效浓度(IC50)为3.546μmol/L,进一步验证了系统的可行性。结论所构建的以KRAS为靶标的抗结肠癌药物筛选系统具有一定有效性和可行性,能够用于以KRAS蛋白为药物靶点的药物高通量筛选,为抗结肠癌的药物研发提供了新的筛选方法。展开更多
基金supported by the National Natural Science Foundation of China,No.81471200,81771341
文摘Rho-associated kinase（ROCK） is a key regulatory protein involved in inflammatory secretion in microglia in the central nervous system.Our previous studies showed that ROCK inhibition enhances phagocytic activity in microglia through the extracellular signal-regulated kinase（ERK） signaling pathway,but its effect on microglial migration was unknown.Therefore,in this study,we investigated the effects of the ROCK inhibitors Y27632 and fasudil on the migratory activity of primary cultured microglia isolated from the spinal cord,and we examined the underlying mechanisms.The microglia were treated with Y27632,fasudil and/or the ERK inhibitor U0126.Cellular morphology was observed by immunofluorescence.Transwell chambers were used to assess cell migration.ERK levels were measured by incell western blot assay.Y27632 and fasudil increased microglial migration,and the microglia were irregularly shaped and had many small processes.These inhibitors also upregulated the levels of phosphorylated ERK protein.The ERK inhibitor U0126 suppressed these effects of Y27632 and fasudil.These findings suggest that the ROCK inhibitors Y27632 and fasudil promote microglial migration in the spinal cord through the ERK signaling pathway.
文摘目的构建以KRAS为靶标的抗结肠癌药物筛选系统,为抗结肠癌药物筛选提供新的技术手段。方法首先选取细胞系并确定系统的技术参数,构建以KRAS为靶标的抗结肠癌药物筛选系统,设计实验验证筛选系统的有效性;而后将构建的筛选系统初步应用,筛选化合物库Z183593-L1200,并对筛选结果进行验证,验证筛选系统的可行性。结果完成筛选系统构建后,通过筛选系统(in-cell Western blot)测得的Hce8693和T47D细胞的KRAS表达差异与普通Western blot一致,筛选系统测定的siRNA系统的敲低效率与普通Western blot亦一致,筛选系统的有效性得到初步验证。筛选激酶抑制剂化合物库Z183593-L1200后,选取活性最好的化合物PF-04691502进行验证;浓度梯度实验显示,随着PF-04691502浓度升高则KRAS胞内含量降低,KRAS胞内含量对PF-04691502浓度呈梯度依赖性;细胞增殖实验结果显示PF-04691502对Hce8693细胞的半数有效浓度(IC50)为3.546μmol/L,进一步验证了系统的可行性。结论所构建的以KRAS为靶标的抗结肠癌药物筛选系统具有一定有效性和可行性,能够用于以KRAS蛋白为药物靶点的药物高通量筛选,为抗结肠癌的药物研发提供了新的筛选方法。
