Tyrosine kinase inhibitor markedly suppresses the development of coronary lesions induced by long-term treatment with platelet-derived growth factor in pigs in vivo

Toshiyuki Kozai, Hiroaki Shimokawa, Yoshihiro Fukumoto, Sei Kobayashi, M. Koji Owada, Toshiaki Kadokami, Akira Ito, Kouichi Kuwata, Kensuke Egashira, Tadayoshi Shiraishi, Hideo Kanaide, Akira Takeshita

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)

    Abstract

    Platelet-derived growth factor (PDGF) plays an important role in the development of coronary atherosclerosis. However, it remains to be examined what morphologic and functional changes are induced in vivo by the long-term treatment with PDGF itself or what pharmacologic interventions could suppress those changes in vivo. Our study was designed to address these points. We examined the effects of long-term treatment with PDGF on the porcine coronary artery in vivo. Under aseptic conditions, the proximal segments of the left porcine coronary artery were gently wrapped with cotton mesh absorbing sepharose beads either with or without recombinant human PDGF-AA or -BB. Two weeks after the operation, coronary hyperconstrictions to intracoronary serotonin or histamine were noted at the sites treated with PDGF-AA or -BB. Histologically, neointimal formation and geometric remodeling (reduction of the total vessel area) were noted at the PDGF-treated sites. These functional and histologic changes of the coronary artery induced by PDGF were markedly inhibited by cotreatment with ST 638, a specific inhibitor of tyrosine kinases. A Western blot analysis showed that ST 638 markedly suppressed the PDGF-induced tyrosine phosphorylations in the coronary segment. These results indicate thai long-term treatment with PDGF induces neointimal formation, geometric remodeling, and vasospastic responses in vivo, for all of which, activation of tyrosine kinases is substantially involved.

    Original languageEnglish
    Pages (from-to)536-545
    Number of pages10
    JournalJournal of Cardiovascular Pharmacology
    Volume29
    Issue number4
    DOIs
    Publication statusPublished - Apr 1997

    All Science Journal Classification (ASJC) codes

    • Pharmacology
    • Cardiology and Cardiovascular Medicine

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