Stec DE, Gannon KP, Beaird JS, Drummond HA. 20-Hydroxyeicosatetraenoic Acid (20-HETE) Stimulates Migration of Vascular Smooth Muscle Cells.
Cell Physiol Biochem 2007;
19:121-8. [PMID:
17310106 DOI:
10.1159/000099200]
[Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/17/2006] [Indexed: 11/19/2022] Open
Abstract
AIM
We tested the hypothesis that 20-HETE production contributes to platelet derived growth factor (PDGF)-BB stimulated migration of VSMC in a cell culture model.
METHODS
Studies were performed with A10 cells which are a rat vascular smooth muscle derived cell line. Migration was determined using a Boyden chamber chemotactic assay.
RESULTS
Pre-treatment of cells with two doses of 20-HETE (100 and 500 nM) significantly increased PDGF-BB stimulated VSMC migration by 34-58% of control; whereas, prior incubation of cells with inhibitors of 20-HETE production, 17-ODYA (1-25 M) or HET0016 (100 nM), significantly decreased PDGF-BB stimulated migration by 40-90%. 20-HETE mediated increase in PDGF-BB migration was completely prevented by the 20-HETE antagonist, WIT-002. In order to determine what second messenger pathways are involved in the 20-HETE mediated stimulation of VSM migration, experiments were performed with specific inhibitors of tyrosine kinase (tyrphostin 25, 10 microM), mitogen-activated extracellular signal-regulated kinase (MEK, PD98059, 20 microM and U0126, 10 microM), protein kinase C (Myr-PKC, 50 microM), and phosphoinositide 3-kinases (PI3Ks) (wortmannin, 50 nM). Blockade of MEK and PI3K all abolished the increase in 20-HETE mediated migration.
CONCLUSION
20-HETE stimulates PDGF-mediated VSM migration acting through pathways that involve MEK and PI3K.
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