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Blood cell and plasma protein repellent properties of Star-PEG-modified surfaces

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The implantation of biomaterials, medical devices or prostheses can instigate a rejection response or initiate an undesirable adsorption of plasma proteins, as well as blood cells on the implant surface, thus triggering diverse defense mechanisms against the supposed pathologic invader. The extent of this inflammatory reaction depends in part on the biocompatibility of the used materials or coatings. Although adsorption and coagulation responses can appear during the total in vivo lifetime of the implant, they are initially and crucially formed within the first 2–4 weeks of implantation. This early phase is of decisive importance for the consecutive in-growth and healing process. The present study was intended to elucidate the effects of blood contact to surfaces modified with reactive six-arm star-shaped poly(ethylene glycol-stat-propylene glycol) pre-polymers (Star PEG). Taken together, for Star-PEG-covered substrates we could demonstrate a profound reduction of various blood–biomaterial interactions compared to non-coated substrates, indicating the promising potential of this material as future coating for biomaterials with blood contact.
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Keywords: HAEMOCOMPATIBILITY; PLASMA PROTEINS; PLATELETS; POLYETHYLENE GLYCOL

Document Type: Research Article

Publication date: 01 September 2006

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