Functional inhibition of Ras by S-trans,trans-farnesyl thiosalicylic acid attenuates atherosclerosis in apolipoprotein E knockout mice.

Abstract:

BACKGROUND:Atherosclerosis is a multifactorial disorder involving inflammatory processes. These responses are associated with robust activation of signaling cascades by diverse cell surface receptors in a variety of cell types. The processes that are involved in atherosclerosis would likely require intact Ras pathways, which play a key role in the control of cell growth, differentiation, and apoptosis. METHODS AND RESULTS:We examined whether the Ras inhibitor farnesyl thiosalicylic acid (FTS) can suppress atherogenesis in the apolipoprotein E-deficient mouse model. Mice were treated with FTS or a control regimen 3 times weekly for 6 weeks and fed a normal chow diet. Two additional groups included FTS-treated and control-treated mice that were fed a high-fat diet for 10 weeks. FTS reduced both fatty streaks and advanced lesions compared with the control treatment. Ras inhibition in vivo was evidenced by the reduced content of the active form of Ras (Ras-GTP) in aortas of FTS-treated mice. Splenocytes from the FTS-treated versus control mice exhibited reduced proliferation to oxidized LDL (OxLDL) but not to concanavalin A. IgG anti-OxLDL antibody levels were reduced in FTS-treated mice compared with controls. Whereas no effect of FTS was evident on plaque T lymphocyte and macrophage content, lesional vascular cell adhesion molecule-1 and nuclear factor-kappaB expression were considerably reduced compared with controls. CONCLUSIONS:FTS suppressed atherosclerotic plaques in apolipoprotein E-deficient mice, providing a useful tool for research in atherosclerosis.

journal_name

Circulation

journal_title

Circulation

authors

George J,Afek A,Keren P,Herz I,Goldberg I,Haklai R,Kloog Y,Keren G

doi

10.1161/01.cir.0000016065.90068.96

subject

Has Abstract

pub_date

2002-05-21 00:00:00

pages

2416-22

issue

20

eissn

0009-7322

issn

1524-4539

journal_volume

105

pub_type

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