摘要
目的 :研究低浓度烷化剂N -甲基 -N’ -硝基 -N -亚硝基胍 (MNNG)对JNK/SAPK及p38MAPK通路的作用及其信号源。方法 :分别测定完整Vero细胞和脱核Vero细胞的JNK/SAPK及p38MAPK酶活性 ,并比较其结果。结果 :低浓度MNNG在完整Vero细胞和脱核Vero细胞中均抑制JNK/SAPK酶活性 ;在p38MAPK通路中 ,完整Vero细胞表现酶活性升高 ,而脱核Vero细胞该激活作用消失。结论 :低浓度MNNG抑制JNK/SAPK的作用不依赖于核内信号 ,而对p38MAPK的激活作用依赖与于核内信号。
AIM: To identify the effect of alkylating agent N-methyl-N'- nitro-N-nitrosoguanidine (MNNG) with low concentration on JNK/SAPK and p38MAPK and the origins of JNK/SAPK and p38MAPK cascade.METHODS: p38 and JNK kinase activity were detected by immunoprecipitation and Western immunoblotting in intact and enucleated Vero cells.RESULTS: With the same experimental conditions, low concentration of MNNG inhibited JNK kinase in both intact cell and enucleated Vero cell. MNNG activated p38 kinase in intact cell while no effect on p38 kinase in enucleated cell was observed.CONCLUSION: Inhibition of JNK/SAPK by low concentration of MNNG was independ of a nuclear signal while MNNG activation of p38MAPK may depend on a nuclear signal.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2003年第4期433-437,T001,共6页
Chinese Journal of Pathophysiology
基金
NationalNaturalScienceFoundationofChina(No .39830 2 10,No .39870 6 84)
DoctoralProjectFoundationofMinistryofEducationPRChina ( 19990 335 5 7)
NatureScienceFoundationofZhejiangProvince (No .2 980 1)
