Now LiCoO2 is the most widely used electrode material in commercial rechargeable lithium-based batteries; however, the toxicity of cobalt and the scarcity of cobalt sources, as well as the limited charge/discharge cap...Now LiCoO2 is the most widely used electrode material in commercial rechargeable lithium-based batteries; however, the toxicity of cobalt and the scarcity of cobalt sources, as well as the limited charge/discharge capacity（130-140 mA.h.g-1） of LiCoO2 electrode drive many efforts to develop various alternative electrode materials, including diverse transition metal oxides and their lithiated counterparts. Amongst them, iron oxides,展开更多
目的:探讨一氧化氮(NO)对肠上皮细胞表达紧密连接蛋白Occludin的影响,以研究NO对肠黏膜屏障的作用机制.方法:将NO的供体Sin1与肠上皮细胞株Caco-2共培养24 h,采用MTT方法观察NO对肠上皮细胞的作用,并分别提取细胞蛋白和总RNA,采用免疫...目的:探讨一氧化氮(NO)对肠上皮细胞表达紧密连接蛋白Occludin的影响,以研究NO对肠黏膜屏障的作用机制.方法:将NO的供体Sin1与肠上皮细胞株Caco-2共培养24 h,采用MTT方法观察NO对肠上皮细胞的作用,并分别提取细胞蛋白和总RNA,采用免疫蛋白印迹(Westem blot)蛋白半定量方法和实时定量聚合酶链式反应(RO-PCR)方法检测不同NO浓度对Caco-2细胞表达紧密连接蛋白Occludin蛋白和mRNA表达的影响.结果:随着Sin1浓度升高(125,250,500和1000μmol/L)NO对细胞的杀伤作用产生并逐渐增大,Occludin蛋白表达量和mRNA的相对表达量与无Sin1刺激时蛋白及mRNA的表达量相比明显降低(蛋白:375±0.5,374±0.8,363±0.3.363±0.7 vs 398±0.7;mRNA:0.689±0.01,0.578±0.09,0.554±0.03,0.619±0.04 vs 1,均P<0.01).结论:NO可直接损伤肠上皮细胞,同时以剂量依赖形式在蛋白和分子水平影响紧密连接蛋白Occludin的表达.展开更多
基金the National Natural Science Foundation of China(Nos.20401015 and 50574082)Beijing Nova Pro-gram(No.2005B20)Program for New Century Excellent Talents in Universities of China
文摘Now LiCoO2 is the most widely used electrode material in commercial rechargeable lithium-based batteries; however, the toxicity of cobalt and the scarcity of cobalt sources, as well as the limited charge/discharge capacity（130-140 mA.h.g-1） of LiCoO2 electrode drive many efforts to develop various alternative electrode materials, including diverse transition metal oxides and their lithiated counterparts. Amongst them, iron oxides,
文摘目的:探讨一氧化氮(NO)对肠上皮细胞表达紧密连接蛋白Occludin的影响,以研究NO对肠黏膜屏障的作用机制.方法:将NO的供体Sin1与肠上皮细胞株Caco-2共培养24 h,采用MTT方法观察NO对肠上皮细胞的作用,并分别提取细胞蛋白和总RNA,采用免疫蛋白印迹(Westem blot)蛋白半定量方法和实时定量聚合酶链式反应(RO-PCR)方法检测不同NO浓度对Caco-2细胞表达紧密连接蛋白Occludin蛋白和mRNA表达的影响.结果:随着Sin1浓度升高(125,250,500和1000μmol/L)NO对细胞的杀伤作用产生并逐渐增大,Occludin蛋白表达量和mRNA的相对表达量与无Sin1刺激时蛋白及mRNA的表达量相比明显降低(蛋白:375±0.5,374±0.8,363±0.3.363±0.7 vs 398±0.7;mRNA:0.689±0.01,0.578±0.09,0.554±0.03,0.619±0.04 vs 1,均P<0.01).结论:NO可直接损伤肠上皮细胞,同时以剂量依赖形式在蛋白和分子水平影响紧密连接蛋白Occludin的表达.
