Anti-CD34 antibodies immobilized on the surface of sirolimus-eluting stents enhance stent endothelialization

JACC. Cardiovascular Interventions
Gaku NakazawaRenu Virmani

Abstract

In this study, we hypothesized that an antihuman-CD34 antibody immobilized on the surface of commercially available sirolimus-eluting stents (SES) could enhance re-endothelialization compared with SES alone. Previous experience with antihuman-CD34 antibody surface modified Genous stents (GS) (OrbusNeich Medical, Fort Lauderdale, Florida) has shown enhanced stent endothelialization in vivo. In the phase 1 study, stents were deployed in 21 pig coronary arteries for single stenting (9 vessels: 3 GS, 3 SES, and 3 bare-metal stents) and overlapping stenting with various combinations (12 vessels: 4 GS+GS, 4 SES+SES, and 4 GS+SES) and harvested at 14 days for scanning electron and confocal microscopy. In phase 2, immobilized anti-CD34 antibody coating was applied on commercially available SES (SES-anti-CD34, n = 7) and compared with GS (n = 8) and SES (n = 7) and examined at 3 and 14 days by scanning electron/confocal microscopy analysis. In phase 1, single stent implantation showed greatest endothelialization in GS (99%) and in bare-metal stent (99%) compared with SES (55%, p = 0.048). In overlapping stents, endothelialization at the overlapping zone was significantly greater in GS+GS (95 +/- 6%) and GS+SES (79 +/- 5%) compared with ...Continue Reading

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