The role of cyclic AMP and protein kinase A in stimulation of neutrophil migration by endothelins

被引:9
作者
Elferink, JGR [1 ]
de Koster, BM [1 ]
机构
[1] Leiden Univ, Dept Med Biochem, NL-2300 RA Leiden, Netherlands
关键词
neutrophil; endothelins; chemotaxis; migration; cAMP; protein kinase A;
D O I
10.1007/PL00005287
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
The role of cAMP and cAMP-dependent protein kinase A (PKA) in endothelin (ET)-stimulated migration of human neutrophils was studied. Endothelins caused an increase in neutrophil migration when they were applied in low (nanomolar) concentrations; stimulation of migration was either predominantly chemokinetic (ET-I) or chemotactic (ET-2, ET-3). All endothelins, at concentrations which gave maximal stimulation of migration, caused an increase of cAMP level. Two inhibitors of adenylate cyclase, MDL-12330A and SQ-22536, completely inhibited migration activated by ET-I, ET-2 or ET-3, indicating that cAMP generation played a decisive role in endothelin-activated migration. The role of PKA in endothelin-activated migration was considered. Two specific antagonists of PKA strongly inhibited endothelin-activated migration. KT-5720, an inhibitor of PKA, also inhibited ET-activated migration, but only when electroporated cells were used. The results suggest that the effect of cAMP on endothelin-activated migration was mediated by PKA.
引用
收藏
页码:518 / 521
页数:4
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