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Design of bioinspired polymeric materials based on poly( D , L ‐lactic acid) modifications towards improving its cytocompatibility
Author(s) -
Niu Xufeng,
Luo Yanfeng,
Li Yonggang,
Fu Chunhua,
Chen Jia,
Wang Yuanliang
Publication year - 2007
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.31360
Subject(s) - materials science , lactic acid , polymer chemistry , polylactic acid , lactide , maleic anhydride , fourier transform infrared spectroscopy , copolymer , diamine , polymer , chemical engineering , composite material , genetics , bacteria , engineering , biology
To design novel bioinspired polymeric material, poly( D , L ‐lactic acid) (DL‐PLA) was on the base and modified in the bulk. Firstly, maleic anhydride (MA) groups were introduced to the side chain of DL‐PLA by the way of melting free radical copolymerization using benzoyl peroxide as an initiator. Then, to neutralize the acid generated during DL‐PLA degradation, aliphatic diamine was immobilized by the N‐acylation of anhydrides with butanediamine. As the following stage, adhesive peptides Arg‐Gly‐Asp‐Ser (RGDS) were grafted into the backbone of DL‐PLA by using carbodiimide as a coupling agent, in order to endow DL‐PLA with bioactivity and biospecificity. The characterizations of the obtained polymers were by the means of GPC‐MALLS, FTIR, 13 C NMR and XPS to explore the structures and rhodamine‐carboxyl interaction method, ninhydrin reaction and amino acid analyzer to determine the content of MA, butanediamine, and RGDS, respectively, followed the test of pH changes during degradation in distilled water (pH = 6.45). Finally, the osteoblast behavior on different DL‐PLA based films was investigated and the results indicated that the introduction of diamine could promote cell attachment and viability, and the incorporation of RGDS further improved its cytocompatibility. The synthetic DL‐PLA based bioinspired material may have potentials for tissue engineering and other biomedical applications. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res, 2008