Rho/Rho-kinase is involved in the synthesis of tissue factor in human monocytes.

Abstract:

:Monocytes and macrophages synthesize tissue factor (TF) which plays a role in thrombogenicity in coronary artery disease. This study was conducted to investigate the effect of Rho/Rho-kinase inhibition on the synthesis of TF in cultured human monocytes. 3-Hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitors (statins), C3 exoenzyme and Rho-kinase inhibitors were added to isolated peripheral blood monocytes and the synthesis of TF was assessed by reverse transcriptase polymerase chain reaction (RT-PCR), Western blotting and immunohistochemistry. Rho activity was determined by measuring the GTP-bound form of Rho A. Cerivastatin and pravastatin reduced the levels of TF antigen and mRNA. The suppressive effect of statins on TF synthesis was reversed by geranylgeranylpyrophosphate (GGPP) and the restoring effect of GGPP was eliminated by C3 exoenzyme and Y-27632. Pravastatin decreased the activity of Rho A, suggesting that the suppression of TF synthesis by statins is mediated via inhibition of the geranylgeranylation of Rho. Moreover, inhibition of Rho and Rho-kinase downregulated the synthesis of TF. Our results suggest that Rho/Rho-kinase signaling is involved in the synthesis of TF in human monocytes and that inhibition of Rho/Rho-kinase may be useful for treating thrombogenicity in coronary artery disease.

journal_name

Atherosclerosis

journal_title

Atherosclerosis

authors

Nagata K,Ishibashi T,Sakamoto T,Ohkawara H,Shindo J,Yokoyama K,Sugimoto K,Sakurada S,Takuwa Y,Nakamura S,Teramoto T,Maruyama Y

doi

10.1016/s0021-9150(01)00750-x

keywords:

subject

Has Abstract

pub_date

2002-07-01 00:00:00

pages

39-47

issue

1

eissn

0021-9150

issn

1879-1484

pii

S0021-9150(01)00750-X

journal_volume

163

pub_type

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