The previous study has shown that the treatment of nitrogen-based non-thermal atmospheric pressure plasma jet (NTAPPJ) on titanium (Ti) surface resulted in promoted cell attachment. Nonetheless, essential understanding on enhanced cell-material interaction with NTAPPJ-treated surface and consequent differentiation of cell on the biomaterial is insufficient. Therefore in this study, effects of NTAPPJ on integrins, that play a fundamental role in regulating the activation of signaling pathways as well as adhesion of cell-material interactions, have been investigated. The Ti samples were exposed to NTAPPJ, where control samples were unexposed to NTAPPJ. The formations of chemical function groups on surface of Ti samples were investigated with X-ray photoelectron spectroscopy. Human plasma fibronectin (FN) adsorption was analyzed by protein assay kit and spectrophotometer. Also, for the investigation of specific gene expression of integrin subunits and osteoblast phenotype genes expression of MC3T3-E1 cells, quantitative PCR was carried out. The results showed that FN adsorption and gene expression levels of integrin subunits α5, β1 and β3, and osteocalcin were significantly higher with cells cultured on NTAPPJ-treated samples. Therefore it was concluded that the cell differentiation along with the adhesion between cells and Ti biomaterials were promoted with NTAPPJ due to the improved integrin activation following the improved protein adsorption. Such results are expected to provide better understanding in application of NTAPPJ on biomaterials.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIP) ( NRF-2010-0027963 and 2012R1A1A2008659 ).
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Physics and Astronomy(all)