lysophosphatidylcholine;
extracellular signal-regulated protein kinase;
cJun N-terminal protein kinase;
tyrosine kinase;
D O I:
10.1016/S0021-9150(98)00297-4
中图分类号:
R5 [内科学];
学科分类号:
1002 ;
100201 ;
摘要:
Lysophosphatidylcholine (lyso-PC) is a major component of an atherogenic lipoprotein. In this study, to investigate the involvement of mitogen-activated protein kinases in the signaling pathway by lyse-PC in endothelial cells, we measured the activity of extracellular signal-regulated kinase (ERK) and c-Jun N-terminal kinase (JNK) in bovine aortic endothelial cells. Lyse-PC activated ERK and JNK in a dose-dependent manner. However, the time courses of activation of these kinases were different. ERK and JNK activation by lyse-PC was inhibited by a tyrosine kinase inhibitor, herbimycin A, but not by a protein kinase C (PKC) specific inhibitor. We conclude, therefore, that lyse-PC-mediated ERK and JNK activation is caused by a tyrosine kinase-dependent mechanism, but not conventional types of PKC-dependent mechanisms. (C) 1999 Elsevier Science Ireland Ltd. All rights reserved.
机构:
UNIV CALIF LOS ANGELES, CTR HLTH SCI, STRUCT BIOL & MOLEC MED LAB, LOS ANGELES, CA 90024 USAUNIV CALIF LOS ANGELES, CTR HLTH SCI, STRUCT BIOL & MOLEC MED LAB, LOS ANGELES, CA 90024 USA
机构:
UNIV CALIF LOS ANGELES, CTR HLTH SCI, STRUCT BIOL & MOLEC MED LAB, LOS ANGELES, CA 90024 USAUNIV CALIF LOS ANGELES, CTR HLTH SCI, STRUCT BIOL & MOLEC MED LAB, LOS ANGELES, CA 90024 USA