Epidermal Growth Factor Induces Vasoconstriction Through the Phosphatidylinositol 3-Kinase-Mediated Mitogen-Activated Protein Kinase Pathway in Hypertensive Rats

Journal of Pharmacological Sciences

Bokyung Kim³  Hwan Myung Lee³  Wahn Soo Choi¹  Junghwan Kim³  Hyun Ha So³  Tae Kyu Park²  Keun Sang Lee³  Hui Yul Roh³  Hyo-Jun Park³  Chang-Kwon Lee³  Hyo Jin Kim³ 

[1] Department of Immunology, College of Medicine, Institute of Biomedical Science and Technology, Konkuk University, Korea;Department of Biotechnology, College of Biomedical & Health Science, Konkuk University, Korea;Department of Physiology, College of Medicine, Institute of Biomedical Science and Technology, Konkuk University, Korea

关键词: epidermal growth factor;    hypertension;    vasoconstriction;    mitogen-activated protein kinase;    phosphatidylinositol 3-kinase;   

DOI  :  10.1254/jphs.FP0060021

学科分类：药学

来源: Nihon Yakuri Gakkai Henshuubu / Japanese Pharmacological Society

【 摘 要 】

References(35)Cited-By(20)We investigated whether increased contractile responsiveness to epidermal growth factor (EGF) is associated with altered activation of mitogen-activated protein kinase (MAPK) in the aortic smooth muscle of deoxycorticosterone acetate (DOCA)-salt hypertensive rats. EGF induced contraction and MAPK activity in aortic smooth muscle strips, which were significantly increased in tissues from the DOCA-salt hypertensive rats compared with those from sham-operated rats. AG1478, PD98059, and LY294002, inhibitors of EGF receptor (EGFR) tyrosine kinase, MAPK/extracellular signal-regulated kinase (ERK) kinase, and phosphatidylinositol 3-kinase (PI3K), respectively, inhibited the contraction and the activity of ERK1/2 that were elevated by EGF. Y27632 and GF109203X, inhibitors of Rho kinase and protein kinase C, respectively, attenuated EGF-induced contraction, with no diminution of ERK1/2 activity. Although EGF also elevated the activity of EGFR tyrosine kinase in both sham-operated and DOCA-salt hypertensive rats, the expression and the magnitude of activation did not differ between strips. These results strongly suggest that EGF induces contraction by the activation of ERK1/2, which is regulated by the PI3K pathway in the aortic smooth muscle of DOCA-salt hypertensive rats.

【 授权许可】

Unknown