Manumycin A, inhibitor of ras farnesyltransferase, inhibits proliferation and migration of rat vascular smooth muscle cells.

Abstract:

:Restenosis after angioplasty is thought to be caused by proliferation and migration of vascular smooth muscle cells (VSMCs), and it is a most serious problem in medical treatment. A low dose (50 ng/ml) of manumycin A, an inhibitor of p21(ras) (ras) farnesylation, significantly inhibited proliferation of rat VSMCs stimulated by the platelet-derived growth factor (PDGF). The mitoinhibitory effect of manumycin A was dose- and time-dependent but was independent of cell density. Western blot analysis showed that manumycin A reduced the amount of functional ras localized at the cytoplasmic membrane and inhibited the phosphorylation of p42/44 mitogen-activated protein kinase (MAPK). Manumycin A also inhibited VSMC migration and disorganized alpha actin fibers, as shown by immnofluorecence staining. These results indicate that the interruption of the ras/MAPK signal transduction pathway and the disorganization of alpha actin fibers are the main cause of manumycin A inhibition of VSMC proliferation and migration induced by PDGF.

authors

Kouchi H,Nakamura K,Fushimi K,Sakaguchi M,Miyazaki M,Ohe T,Namba M

doi

10.1006/bbrc.1999.1546

subject

Has Abstract

pub_date

1999-11-02 00:00:00

pages

915-20

issue

3

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(99)91546-2

journal_volume

264

pub_type

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