Lotus-leaf-like structured heparin-conjugated poly(L-lactide-co-ε-caprolactone) as a blood compatible material

Title
Lotus-leaf-like structured heparin-conjugated poly(L-lactide-co-ε-caprolactone) as a blood compatible material
Authors
임진익김승일김수현
Keywords
Antithrombotic material; Heparin; Lotus-leaf-like structure; Blood vessel; Surface modification
Issue Date
2013-03
Publisher
Colloids and surfaces. B, Biointerfaces
Citation
VOL 103, 463-467
Abstract
A heparin-conjugated biodegradable polymer was synthesized by direct coupling of heparin to poly(L-lactide-co-ɛ-caprolactone) (PLCL) and was manufactured into lotus-leaf-like structured films. We evaluated whether lotus-leaf-like structured heparin-conjugated PLCL (LH-PLCL) could be applied to blood vessel tissue engineering. Differences in the surface structures of the films with respect to hydrophobicity and the lotus effect as well as the antithrombotic efficiency in human whole blood were examined using scanning electron microscopy (SEM) and a contact angle meter. Recovery testing was conducted using a tensile strength testing machine, and quantitative analysis of conjugated heparin was performed using the toluidine blue colorimetric method. The concentration of conjugated heparin was 0.14 μg/mg H-PLCL, and the contact angle with the lotus-leaf-like surface was approximately 120°. Furthermore, the LH-PLCL film yielded a lower platelet adhesion rate (around less than 1.4%) in whole blood than that yielded by an untreated PLCL film. These results indicate a unique property of bound heparin and the lotus-leaf-like structure. This novel LH-PLCL polymer could be applied as a blood/tissue compatible biodegradable material for implantable medical devices and tissue engineering.
URI
http://pubs.kist.re.kr/handle/201004/46185
ISSN
09277765
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KIST Publication > Article
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