Vascular prostheses with controlled release of antibiotics

• Published in: Biomolecular engineering 2007-02, Vol.24 (1), p.143-148
• Main Authors: Blanchemain, N., Haulon, S., Boschin, F., Traisnel, M., Morcellet, M., Martel, B., Hildebrand, H.F.
• Format: Article
• Language: English
• Subjects: Adhesion; Biocompatibility; Cyclodextrins; Grafting; PET vascular prosthesis; Toxicity
• ISSN: 1389-0344; 1878-559X
• DOI: 10.1016/j.bioeng.2006.05.011

Viability tests by the colony forming method show no toxicity for all CDs (β-CD, γ-CD, HPβ-CD and HPγ-CD) and their associated polymer. A survival rate of 100% is observed for all CDs at high concentration 400 ppm. Proliferation tests revealed a low proliferation of L132 cells on grafted vascular prostheses and untreated prostheses and good proliferation on Melinex ® (film form of PET). A proliferation of 17% is observed after 3 days of incubation and decrease at 4% after 6 days on prostheses. Melinex ® exhibits a proliferation rate as the controls. Vitality tests confirm proliferation tests and show a good vitality of cells even for low cell amounts. From these experiments it becomes obvious that the decreasing proliferation rate is not a cytotoxic effect but is due to the chemical and/or physical surface characteristics. A similar result is obtained for cell adhesion kinetics between grafted vascular prostheses and control. After 2 h adhesion, a lower adhesion is observed on untreated prostheses. Theses results were confirmed by immunochemistry and morphology tests. This cell adhesion inhibiting effect of the PET prostheses contributes to a better “survival” of vascular prostheses without secondary obstruction or stenosis.