Carboxypeptidase E （CPE） is a prohormone-processing enzyme and sorting receptor that functions intracellularly. However, recent studies have demonstrated that CPE acts as atrophic factor extracellularly to up-regula...Carboxypeptidase E （CPE） is a prohormone-processing enzyme and sorting receptor that functions intracellularly. However, recent studies have demonstrated that CPE acts as atrophic factor extracellularly to up-regulate the expression of a pro-survival gene. This mini-review summarizes the roles of CPE in neuroprotection and the implications for neurodegenerative diseases.展开更多
目的:观察糖肾清2号提取物对高糖环境下的小鼠肾小球系膜细胞株AMPK-α1、IκBα、TLR-4mRNA转录和蛋白表达的影响,探讨该方抑制高糖环境下肾小球系膜细胞株免疫炎性病理损伤的分子机制。方法:采用小鼠肾小球系膜细胞株SV40 MES 13,在5%...目的:观察糖肾清2号提取物对高糖环境下的小鼠肾小球系膜细胞株AMPK-α1、IκBα、TLR-4mRNA转录和蛋白表达的影响,探讨该方抑制高糖环境下肾小球系膜细胞株免疫炎性病理损伤的分子机制。方法:采用小鼠肾小球系膜细胞株SV40 MES 13,在5%CO_2、37℃恒温培养箱常规培养。实验分组:空白对照组(D-葡萄糖5.6 mmol/L)、高糖组(D-葡萄糖30 mmol/L)、中药低浓度组(高糖+糖肾清2号提取物5μmol/L)、中药中浓度组(高糖+糖肾清2号提取物10μmol/L)、中药高浓度组(高糖+糖肾清2号提取物20μmol/L),共同孵育12、24、36 h进行指标检测。采用RT-PCR技术检测肾小球系膜细胞AMPKα1、IκBα、TLR4 mRNA转录水平;Western-blot技术检测肾小球系膜细胞AMPKα1、IκBα、TLR4的蛋白表达水平。结果:与空白对照组比较,高糖组AMPKα1、IκBαmRNA转录水平及蛋白表达下调(P<0.05),TLR4 mRNA转录水平及蛋白表达水平上调(P<0.01),差异有统计学意义。与高糖组比较,中药各浓度组AMPKα1、IκBα蛋白表达水平上调(P<0.05),中药高、低浓度组AMPKα1、IκBαmRNA转录水平上调(P<0.05)。中药各浓度组TLR4mRNA转录水平下调(P<0.01),中、高浓度组TLR4蛋白表达水平下调(P<0.01)。结论:糖肾清2号抑制高糖环境下肾小球系膜细胞免疫炎性代谢性损伤,此分子机制可能与调节AMPK信号通路相关。展开更多
基金supported by the Intramural Research Program of the Eunice Kennedy Shriver National Institute of Child Health and Human Development,National Institutes of Health,Bethesda,MD,USA
文摘Carboxypeptidase E （CPE） is a prohormone-processing enzyme and sorting receptor that functions intracellularly. However, recent studies have demonstrated that CPE acts as atrophic factor extracellularly to up-regulate the expression of a pro-survival gene. This mini-review summarizes the roles of CPE in neuroprotection and the implications for neurodegenerative diseases.
