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Issue title: Papers of the 31st Conference of the German Society for Clinical Microcirculation and Hemorheology, Halle, Germany, 15–16 June 2012
Article type: Research Article
Authors: Tzoneva, Rumiana | Seifert, Barbara | Behl, Marc; | Lendlein, Andreas;
Affiliations: Department “Electro-induced and adhesive properties”, Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria | Center for Biomaterial Development and Berlin-Brandenburg Centre for Regenerative Therapies, Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Teltow, Germany | Tianjin University-Helmholtz-Zentrum Geesthacht, Joint Laboratory for Biomaterials and Regenerative Medicine, Tianjin, China
Note: [] Corresponding author: Rumiana Tzoneva, Department “Electro-induced and adhesive properties”, Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, bl. 21, 1113 Sofia, Bulgaria. Tel.: +359 2 979 3685; Fax: +359 2 872 37 87; E-mail: tzoneva@bio21.bas.bg
Abstract: Hemocompatibility of elastic multiblock copolymers PDC, based on poly(p-dioxanone) (PPDO)/poly(ε-caprolactone)-segments, capable of a shape-memory effect, and PDD, based on PPDO/poly((adipinate-alt-1,4-butanediol)-co-(adipinate-alt-ethylene glycol)-co-adipinate-alt-diethylene glycol)-segments, was studied in order to assess their suitability for an application aiming at blood vessels regeneration. The results were compared with polypropylene (PP) which is a widely used blood-contacting material for devices as blood oxygenators and dialysis tubes. Protein adsorption studies showed diverse blood plasma proteins in a relatively high amount on both elastic polymers compared to the poor amount of plasma proteins adsorbed on PP. Study of the coagulation system revealed high thrombin formation on PDC and no difference in plasma kallikrein activation between elastic multiblock copolymers and the reference PP. Activation of complement system was higher for PDC followed by PDD and lower for PP. However, platelet adhesion and activation were hardly suppressed on the multiblock copolymers compared to the PP surface, where the number of adhered platelets and the activation rate were significant. The present results reveal that the tested multiblock copolymers with improved elastic properties and shape-memory capability (PDC) show low thrombogenicity and are promising candidates for vascular tissue engineering.
Keywords: Hemocompatibility, degradable elastic polymer, protein adsorption, coagulation, thrombin formation, platelet adhesion/activation, shape-memory polymer
DOI: 10.3233/CH-2012-1609
Journal: Clinical Hemorheology and Microcirculation, vol. 52, no. 2-4, pp. 337-348, 2012
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