摘要
目的 :研究PMA对CD18mRNA表达的促进作用及机制。方法 :选用PMA刺激下的U937细胞为实验模型 ,运用定量RT -PCR方法检测U937细胞CD18mRNA的表达水平。结果 :PMA具有浓度和时间依赖性地诱导U937细胞CD18mRNA表达的作用 ,这种作用能分别被PKC、NF -κB抑制剂所抑制 ,但不能被转录因子AP - 1抑制剂所抑制。结论 :PMA能激活细胞的PKC ,进而通过其后的信号转导通路促进CD18mRNA的表达 ,转录因子NF -κB为PMA刺激下的U937细胞CD18基因转录所必需 ,而AP -
AIM: To investigate the effect of PMA(phorbol 12-myristate 13-acetate) on the expression of CD18 and the mechanism. METHODS: The technique of quantitative RT-PCR analysis was used to measure the expression of CD18 mRNA in U937 cells treated by PMA. RESULTS: PMA could significantly induce CD18 mRNA expression in a dose and time-dependent manner. The induction effects of PMA on CD18 mRNA could be inhibited obviously by Myr (2 μmol/L), a specific inhibitor of PKC, and APDC, an inhibitor of NF-κB, but not be inhibited by curcumin, a inhibitor of transcriptional factor AP-1. CONCLUSION: PMA enhanced the expression of CD18 via the pathway of PKC. Transcriptional factor NF-κB, but not AP-1, was essential for the gene transcription of CD18 in U937 cells treated by PMA.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2002年第5期497-500,共4页
Chinese Journal of Pathophysiology
基金
国家自然科学基金资助项目 (No 395 0 0 0 6 0 )
