蛋白激酶C激动剂对可溶性淀粉样前体蛋白分泌的影响  被引量:1

Effects of Protein Kinase C Activator on Secretion of Soluble Amyloid Precursor Protein

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作  者:杨红旗[1] 陈生弟[1] 巴茂文[1] 任汝静[1] 张宇红[1] 马建芳[1] 陆国强[1] 

机构地区:[1]上海交通大学医学院瑞金医院神经内科神经病学研究所,上海200025

出  处:《上海交通大学学报(医学版)》2006年第7期711-714,共4页Journal of Shanghai Jiao tong University:Medical Science

基  金:国家自然科学基金(30471918);国家重点基础研究发展计划(973计划)(2006CB500700);上海市科委(04D214005)资助项目

摘  要:目的 观察蛋白激酶C(PKC)激动剂(2S,5S)-(E,E)-8-(5-(4-(trifluoromethyl)phenyl)-2,4-pentadienoylamino)benzoctam(TPPB)在体外对淀粉样前体蛋白(APP)代谢的影响。方泼用不同浓度的TPPB作用于PCI2细胞3h,Western blot检测其对细胞培养上清液内可溶性淀粉样前体蛋白(sAPPα)分泌和细胞内APP表达的影响;并观察加入PKC抑制剂GF109203-X后TPPB对细胞外sAPPα分泌的影响。结果0.1~10μmoL/L的TPPB可以使sAPPα分泌增加,而对细胞本身APP的表达无显著影响(P〉0.05);PKC抑制剂GF109203-X可以部分消除TPPB促进sAPPα分泌的作用。结论PKC激动剂TPPB可以使APP通过α分泌酶增加细胞对sAPPα的分泌,提示TPPB有可能对阿尔茨海默病具有潜在的治疗作用。Objective To explore the effects of protein kinase C (PKC) activator (2S,5S)-(E,E)-8-(5-(4-(trifluoromethyl) phenyl)-2,4-pentadienoylamino) benzolactam (TPPB) on amyloid precursor protein (APP) processing in vitro. Methods PC12 cells were treated with different concentrations of TPPB for 3 h and Western blot was carried out to detect the secretion of α-secretase form of soluble amyloid precursor protein (sAPPa) in the supernatant and cellular full-length APP expression. In a separate group, PKC inhibitor GF109203-X was added to cell media to investigate its effect on sAPPα secretion after TPPB treatment. Results TPPB promoted sAPPα release as compared with control ( DMSO), but did not significantly affected cellular APP expression (P 〉 0.05). The effect of increasing sAPPα secretion by TPPB was partially blocked by PKC inhibitor GF109203-X. Conclusion TPPB can increase sAPPα secretion via α-secretase processing pathway and may have therapeutic potential in Alzheimer' s disease.

关 键 词:阿尔茨海默病 蛋白激酶C 淀粉样前体蛋白 可溶性淀粉样前体蛋白 

分 类 号:R749.161[医药卫生—神经病学与精神病学]

 

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