Volume 105, Issue 11 pp. 3176-3188
Original Article

Description of D-glucosamine immobilization kinetics onto poly(lactic acid) surface via a multistep physicochemical approach for preparation of novel active biomaterials

Ahmed E. Swilem

Ahmed E. Swilem

Centre of Polymer Systems, Tomas Bata University in Zlín, Trida Tomase Bati 5678, Zlín, 760 01 Czech Republic

Department of Chemistry, Faculty of Science, Ain Shams University, Abbassia, Cairo, 11566 Egypt

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Marian Lehocký

Corresponding Author

Marian Lehocký

Centre of Polymer Systems, Tomas Bata University in Zlín, Trida Tomase Bati 5678, Zlín, 760 01 Czech Republic

Correspondence to: M. Lehocký; e-mail: [email protected]Search for more papers by this author
Petr Humpolíček

Petr Humpolíček

Centre of Polymer Systems, Tomas Bata University in Zlín, Trida Tomase Bati 5678, Zlín, 760 01 Czech Republic

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Zdenka Kucekova

Zdenka Kucekova

Centre of Polymer Systems, Tomas Bata University in Zlín, Trida Tomase Bati 5678, Zlín, 760 01 Czech Republic

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Igor Novák

Igor Novák

Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, Bratislava, Slovakia, 845 41

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Matej Mičušík

Matej Mičušík

Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, Bratislava, Slovakia, 845 41

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Hassan A. Abd El-Rehim

Hassan A. Abd El-Rehim

Department of Polymers, National Center for Radiation Research and Technology, Atomic Energy Authority, Nasr City, Cairo, 11371 Egypt

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El-Sayed A. Hegazy

El-Sayed A. Hegazy

Department of Polymers, National Center for Radiation Research and Technology, Atomic Energy Authority, Nasr City, Cairo, 11371 Egypt

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Ashraf A. Hamed

Ashraf A. Hamed

Department of Chemistry, Faculty of Science, Ain Shams University, Abbassia, Cairo, 11566 Egypt

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Jaroslav Kousal

Jaroslav Kousal

Faculty of Mathematics and Physics, Charles University Prague, V Holesovickach 2, Prague 8, 18000 Czech Republic

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First published: 13 July 2017
Citations: 7

Abstract

Poly(lactic acid) (PLA) has shown much success in the preparation of tissue engineering scaffolds as it can be fabricated with a tailored architecture. However, the PLA surface has drawbacks including the lack of biofunctional motifs which are essential for high affinity to biological cells. Therefore, this study describes a multistep physicochemical approach for the immobilization of d-glucosamine (GlcN), a naturally occurring monosaccharide having many biological functions, on the PLA surface aiming at enhancing the cell proliferation activity. In this approach, poly(acrylic acid) (PAAc) spacer arms are first introduced into the PLA surface via plasma post-irradiation grafting technique. Then, covalent coupling or physical adsorption of GlcN with/on the PAAc spacer is carried out. Factors affecting the grafting yield are controlled to produce a suitable spacer for bioimmobilization. X-ray photon spectroscopic (XPS) analyses confirm the immobilization of GlcN on the PLA surface. The XPS results reveal also that increasing the yield of grafted PAAc spacer on the PLA surface increases the amount of covalently immobilized GlcN, but actually inhibits the immobilization process using the physical adsorption method. Contact angle measurements and atomic force microscopy (AFM) show a substantial increase of surface energy and roughness of PLA surface, respectively, upon the multistep modification procedure. The cytocompatibility of the modified surfaces is assessed using a mouse embryonic fibroblast (MEF) cell line. Observation from the cell culture basically demonstrates the potential of GlcN immobilization in improving the cytocompatibility of the PLA surface. Moreover, the covalent immobilization of GlcN seems to produce more cytocompatible surfaces if compared with the physical adsorption method. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 3176–3188, 2017.

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