Acta Metallurgica Sinica (English Letters) ›› 2017, Vol. 30 ›› Issue (6): 558-566.DOI: 10.1007/s40195-017-0542-2

Special Issue: 2017复合材料专辑

• Orginal Article • Previous Articles     Next Articles

In Vitro Biocompatibility of MC3T3-E1 Osteoblast-like Cells on Arg-Gly-Asp Acid Peptides Immobilized Graphite-like Carbon Coating on Carbon/Carbon Composites

Sheng Cao1, He-Jun Li1, Ke-Zhi Li1, Jin-Hua Lu1, Lei-Lei Zhang1   

  1. 1 State Key Laboratory of Solidification Processing,Northwestern Polytechnical University, Xi’an 710072, China
  • Received:2017-02-13 Revised:2017-02-13 Online:2017-06-30 Published:2017-08-25

Abstract:

Carbon/carbon (C/C) composites were deposited with graphite-like carbon (GLC) coating, and then, Arg-Gly-Asp acid (RGD) peptides were successfully immobilized onto the functionalized GLC coating. GLC coating was utilized to prevent carbon particles releasing and create a uniform surface condition for C/C composites. RGD peptides were utilized to improve biocompatibility of GLC coating. Surface chemical characterizations of functionalized GLC coating were detected by contact angle measurement, X-ray photoelectron spectroscopy and Raman spectra. Optical morphology of GLC coatings was observed by confocal laser scanning microscopy. In vitro biological performance was determined using samples seeded with MC3T3-E1 osteoblast-like cells and cultured for 1 week. Surface characterizations and morphological analysis indicated that C/C composites were covered by a dense and uniform GLC coating. Contact angle of GLC coating was reduced to 27.2° when it was functionalized by H2O2 oxidation at 40 °C for 1 h. In vitro cytological test showed that the RGD peptides immobilized GLC coating had a significant improvement in biocompatibility. It was suggested that RGD peptides provided GLC coating with a bioactive surface to improve cell adhesion and proliferation on C/C composites.

Key words: MC3T3-E1 osteoblast-like cells, Carbon/carbon composites, Graphite-like carbon (GLC) coating, Arg-Gly-Asp acid (RGD) peptides, Surface modification