Corticosterone-induced rapid phosphorylation of p38 and JNK mitogen-activated protein kinases in PC12 cells.
The present study showed that corticosterone (B) could induce a rapid activation of p38 and c-Jun NH(2)-terminal protein kinase (JNK) in PC12 cells. The dose-response and time-response curves were bell-shaped with maximal activation at 10(-9) M and at 15 min. RU38486 had no effect, and bovine serum albumin-coupled B could induce the activation. Genistein failed to block the phosphorylation, suggesting the pathway was not involved in tyrosine kinase activity. Phorbol 12-myristate 13-acetate could mimic, while Gö6976 could abolish the actions. These results demonstrated that B might act via a putative membrane receptor to activate p38 and JNK rapidly through a protein kinase C-dependent pathway.
Li
X
X
Institute of Neuroscience, Second Military Medical University, Shanghai, People's Republic of China.
Qiu
J
J
Wang
J
J
Zhong
Y
Y
Zhu
J
J
Chen
Y
Y
D000818:Animals; D000893:Anti-Inflammatory Agents / Q000494:pharmacology*; D003345:Corticosterone / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004789:Enzyme Activation / Q000187:drug effects; D004791:Enzyme Inhibitors / Q000494:pharmacology; D019833:Genistein / Q000494:pharmacology; D006727:Hormone Antagonists / Q000494:pharmacology; D048031:JNK Mitogen-Activated Protein Kinases; D015735:Mifepristone / Q000494:pharmacology; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism*; D016716:PC12 Cells; D010766:Phosphorylation / Q000187:drug effects; D011493:Protein Kinase C / Q000378:metabolism; D051381:Rats; D013997:Time Factors; D048051:p38 Mitogen-Activated Protein Kinases
D000893:Anti-Inflammatory Agents; D004791:Enzyme Inhibitors; D006727:Hormone Antagonists; D015735:Mifepristone; D019833:Genistein; D011493:Protein Kinase C; D048031:JNK Mitogen-Activated Protein Kinases; D020928:Mitogen-Activated Protein Kinases; D048051:p38 Mitogen-Activated Protein Kinases; D003345:Corticosterone