Polymer stent coating for prevention of neointimal hyperplasia

Billinger, Michael; Buddeberg, Felix; Hubbell, Jeffrey A; Elbert, Donald L; Schaffner, Thomas; Mettler, Daniel; Windecker, Stephan; Meier, Bernhard; Hess, Otto M (2006). Polymer stent coating for prevention of neointimal hyperplasia. Journal of invasive cardiology, 18(9), 423-6; discussion 427. Malvern, Pa.: HMP Communications

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AIMS: Restenosis has been the principal limitation of bare metal stents. Based upon the presumption that platelet and inflammatory cell recruitment initiate neointimal proliferation, we explored a novel polymer coating that reduces cell-stent interactions. The purpose of the present study was to investigate the effect of poly(L-lysine)-graft-poly(ethyleneglycol) (PLL-g-PEG) adsorbed to stent surfaces to reduce neointimal hyperplasia in the porcine restenosis model. METHODS AND RESULTS: Seven animals were instrumented each with 2 stainless steel stents (15 mm length, 2.5-3.5 mm diameter), randomly implanted in 1 major epicardial coronary artery. One stent was dip-coated with PLL-g-PEG, whereas the other stent served as the uncoated control stent. All animals were sacrificed after 6 weeks for histological examination. Neointimal hyperplasia was significantly less (-51%) in the PLL-g-PEG-coated stents (1.15 +/- 0.59 mm2) than in the uncoated control stents (2.33 +/- 1.01 mm2; p < 0.001). Conversely, lumen size was larger in the PLL-g-PEG-coated stents (2.91 +/- 1.17 mm2) than in the uncoated stents (2.04 +/- 0.64 mm2; p < 0.001). High magnification histomorphologic examination revealed no signs of inflammation or thrombus formation in either stent group. CONCLUSIONS: Polymeric steric stabilization of stents with PLL-g-PEG significantly reduces neointimal hyperplasia in the porcine restenosis model. Reduction of cell-stent interactions mediated by PLL-g-PEG appear to improve biocompatibility of stainless steel stents without evidence of adverse inflammatory or prothrombotic effects.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Cardiovascular Disorders (DHGE) > Clinic of Cardiology
04 Faculty of Medicine > Service Sector > Institute of Pathology
04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > DCR Services > ESI

UniBE Contributor:

Billinger, Michael, Schaffner, Thomas, Mettler, Daniel, Windecker, Stephan, Meier, Bernhard, Hess, Otto






HMP Communications




Factscience Import

Date Deposited:

04 Oct 2013 14:46

Last Modified:

05 Dec 2022 14:14

PubMed ID:


Web of Science ID:



https://boris.unibe.ch/id/eprint/19030 (FactScience: 1397)

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