Upregulation of neuropilin-1 by basic fibroblast growth factor enhances vascular smooth muscle cell migration in response to VEGF.
Cytokine
; 32(5): 206-12, 2005 Dec 07.
Article
in En
| MEDLINE
| ID: mdl-16289960
ABSTRACT
Neuropilin-1 (NRP-1) is a co-receptor for vascular endothelial growth factor (VEGF). During neovascularization, vascular smooth muscle cells (VSMCs) and pericytes modulate the function of endothelial cells. Factors that mediate NRP-1 in human VSMCs (hVSMCs) remain to be elucidated. We studied various angiogenic cytokines to identify factors that increase NRP-1 expression in hVSMCs. Treatment of hVSMCs with basic fibroblast growth factor (b-FGF) induced expressions of NRP-1 mRNA and protein whereas epidermal growth factor, insulin-like growth factor-1, and interleukin-1beta did not. b-FGF induced phosphorylation of Erk-1/2 and JNK. MEK1/2 and nuclear factor kappa B (NF-kappaB) inhibitors (U0126 and TLCK, respectively) blocked the ability of b-FGF to induce NRP-1 mRNA expression, but inhibition of JNK (SP600125) or PI3-kinase activity (wortmannin) did not. Further, the increase in NRP-1 expression by b-FGF enhanced hVSMCs migration in response to VEGF(165). This effect was dependent on the binding of VEGF(165) to VEGFR-2, as blocking antibodies to VEGFR-2, but not VEGFR-1, inhibited VEGF(165)-induced migration. In conclusion, b-FGF increased NRP-1 expression in hVSMCs that in turn enhance the effect of VEGF(165) on cell migration. The enhanced migration of hVSMCs was mediated through binding of VEGF(165) to both NRP-1 and VEGFR-2, as inhibition of VEGFR-2 on these cells blocked the effect of VEGF-mediated cell migration.
Search on Google
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Up-Regulation
/
Cell Movement
/
Fibroblast Growth Factor 2
/
Neuropilin-1
/
Vascular Endothelial Growth Factor A
/
Muscle, Smooth, Vascular
Type of study:
Prognostic_studies
Limits:
Humans
Language:
En
Journal:
Cytokine
Journal subject:
ALERGIA E IMUNOLOGIA
Year:
2005
Document type:
Article
Affiliation country:
United States