期刊
APPLIED SURFACE SCIENCE
卷 360, 期 -, 页码 858-865出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2015.11.077
关键词
Poly(D,L-lactide); Dopamine; Chitooligosaccharide; Surface modification; Osteogenic differentiation
类别
资金
- National Natural Science Foundation of China [31570981, 81171459, 21104027]
- Project on the Integration of Industry, Education and Research of Guangdong Province [20138090500107]
- Science and Technology Program of Guangzhou [201510010135]
- Research Fund for the Excellent Doctorial Dissertation of Guangdong Province [sybzzxm201121]
To develop a chitooligosaccharide(COS)-functionalized poly(D,L-lactide) (PDLLA) membrane to enhance growth and osteogenic differentiation of MC3T3-E1 cells, firstly a thin polydopamine (PDOPA) layer was adhered to the PDLLA membrane via the self-polymerization and strong adhesion behavior of dopamine. Subsequently, COS was immobilized covalently on the resultant PDLLA/PDOPA composite membrane by coupling with PDOPA active coating. The successful immobilization of the PDOPA and COS was confirmed by attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). Scanning electronic microscopy (SEM) and atomic force microscopy (AFM) results indicated that the surface topography and roughness of the membranes were changed, and the root mean square increased from 0.613 nm to 6.96 and 7.12 nm, respectively after coating PDOPA and COS. Water contact angle and surface energy measurements revealed that the membrane hydrophilicity was remarkably improved by surface modification. In vitro cells culture results revealed that the PDOPA- and COS-functionalized surfaces showed a significant increase in MC3T3-E1 cells adhesion, proliferation, osteogenic differentiation and alkaline phosphate activity compared to the pristine PDLLA substrate. Furthermore the COS-functionalized PDLLA membrane was more effectively at enhancing osteoblast activity than the PDOPA-functionalized PDLLA membrane. (C) 2015 Published by Elsevier B.V.
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