Prevention of cardiac allograft arteriosclerosis by protein tyrosine kinase inhibitor selective for platelet-derived growth factor receptor

Article

关键词: SMOOTH-MUSCLE CELLS;    HUMAN ATHEROSCLEROTIC PLAQUES;    SIGNAL-TRANSDUCTION;    CHRONIC REJECTION;    GENE-EXPRESSION;    PROLIFERATION;    RAT;    CYCLOSPORINE;    KETOCONAZOLE;    LOCALIZATION;   

DOI  :  10.1161/01.CIR.99.17.2295

来源: SCIE

【 摘 要 】

Background-Increased immunoreactivity of platelet-derived growth factor (PDGF)-AA, -R alpha, and -R beta in intimal cells correlates with the development of cardiac allograft arteriosclerosis, a condition for which there is little or no current therapy. Therefore, we hypothesized that PDGF may have a rate-limiting role in the development of this disease. Methods and Results-The hypothesis was tested in a rat model of heterotopic cardiac and aortic allografts using dark agouti (AG-B4, RT1(a)) donors and Wistar-Furth (AG-B2, RT1(a)) recipients. The recipients received CGP 53716, a selective PDGF-R protein tyrosine kinase inhibitor, 50 mg.kg(-1).d(-1), or vehicle for 60 days. Cardiac allograft recipients also received background cyclosporin A immunosuppression. Our results demonstrate that CGP 53716 significantly reduced the incidence and intensity of arteriosclerotic lesions in rat cardiac and aortic allograft recipients. When rat coronary smooth muscle cells were stimulated in vitro with PDGF-AA or -BB in the presence of interleukin-1 beta or tumor necrosis factor-alpha, CGP 53716 significantly inhibited only AA-ligand-induced but not BB-ligand-induced replication. Concomitantly, in quantitative reverse transcriptase-polymerase chain reaction, interleukin-1 beta or tumor necrosis factor-alpha stimulation specifically upregulated the expression of PDGF-R alpha mRNA but not of other ligand or receptor genes in cultured smooth muscle cells. Conclusions-We conclude that a PDGF-AA/R alpha-dependent cycle is induced in the generation of allograft arteriosclerosis that may be inhibited by blocking of signaling downstream of PDGF-R.

【 授权许可】

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