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Platelet adhesion studies on nanostructured poly(lactic‐ co ‐glycolic‐acid)–carbon nanotube composite
Author(s) -
Koh Li Buay,
Rodriguez Isabel,
Zhou Jijie
Publication year - 2008
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.31605
Subject(s) - materials science , plga , composite number , adhesion , carbon nanotube , nanocomposite , contact angle , platelet activation , biomaterial , chemical engineering , platelet , composite material , biophysics , nanotechnology , nanoparticle , medicine , engineering , immunology , biology
Design of blood‐compatible surfaces is required to minimize platelet–surface interactions and increase the thromboresistance of foreign surfaces. Poly(lactic‐ co ‐glycolic‐acid)–carbon nanotube (PLGA‐CNT) composite is studied as a building material to fabricate artificial blood prostheses. This nanocomposite‐based biomaterial is prepared by an electrostatic Layer‐by‐Layer (LbL) deposition technique, in which layers of CNTs are adsorbed onto a PLGA film. Before incubation in nonstimulated platelet‐rich plasma (PRP) for platelet studies, fibrinogen is immobilized on PLGA‐CNT composite. Interactions between the plasma proteins, e.g. fibrinogen and PRP, are investigated on the prepared PLGA‐CNT composite. Contact angle measurements on the PLGA‐CNT composite displayed a good resistance of platelets adhesion on a hydrophilic surface with an angle of 64.94° as compared to pristine PLGA control with an angle of 93.43°. A significant reduction of adhesion is observed on the PLGA‐CNT composite, as well as the absence of platelet activation. On the contrary, both platelet adhesion and activation are observed on control samples. We inferred this suppression in secretion of granule contents in the platelet by the presence of the CNTs that resulted in the absence of platelet activation and its subsequent inhibition in the release of adhesive membrane receptors on the PLGA‐CNT composite. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res, 2008