Imatinib mesylate-incorporated nanoparticle-eluting stent attenuates in-stent neointimal formation in porcine coronary arteries

Seigo Masuda, Kaku Nakano, Kouta Funakoshi, Gang Zhao, Wei Meng, Satoshi Kimura, Tetsuya Matoba, Miho Miyagawa, Eiko Iwata, Kenji Sunagawa, Kensuke Egashira

研究成果: ジャーナルへの寄稿学術誌査読

46 被引用数 (Scopus)


Aim: The use of currently marketed drug-eluting stents (DES) presents safety concerns, including an increased risk for late thrombosis in the range of 0.6% per year in patients, including acute coronary syndrome, which is thought to result from delayed endothelial healing effects. A new DES system targeting vascular smooth muscle cells without adverse effects on endothelial cells is therefore needed. Platelet-derived growth factor (PDGF) plays a central role in the pathogenesis of restenosis; therefore, we hypothesized that imatinib mesylate (PDGF receptor tyrosine kinase inhibitor) encapsulated bioabsorbable polymeric nanoparticle (NP)-eluting stent attenuates in-stent neointima formation. Methods: Effects of imatinib-incorporated NP-eluting stent on neointima formation and endothelial healing were examined in a pig coronary artery stent model. Effects of imatinib-NP were also examined in cultured cells. Results: In a cultured cell study, imatinib-NP attenuated the proliferation of vascular smooth muscle cells associated with inhibition of the target molecule (phosphorylation of PDGF receptor-β), but showed no effect on endothelial proliferation. In a pig coronary artery stent model, imatinib-NPeluting stent markedly attenuated in-stent neointima formation and stenosis by approximately 50% as assessed by angiographic, histopathological, and intravascular ultrasound imaging analyses. Imatinib- NP-eluting stent also attenuated MAP kinase activity, but did not affect inflammation and re-endothelialization. Conclusion: These data suggest that suppression of neointima formation by a imatinib-NP-eluting stent holds promise as a molecular-targeting NP delivery system for preventing in-stent restenosis.

ジャーナルJournal of atherosclerosis and thrombosis
出版ステータス出版済み - 12月 22 2011

!!!All Science Journal Classification (ASJC) codes

  • 内科学
  • 循環器および心血管医学
  • 生化学、医学


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