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Immobilizing osteogenic growth peptide with and without fibronectin on a titanium surface: effects of loading methods on mesenchymal stem cell differentiation

Authors Chen C, Li H, Kong X, Zhang S, Lee I

Received 22 September 2014

Accepted for publication 9 November 2014

Published 31 December 2014 Volume 2015:10(1) Pages 283—295

DOI https://doi.org/10.2147/IJN.S74746

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 4

Editor who approved publication: Prof. Dr. Thomas J Webster

Cen Chen,1,2 Han Li,1 Xiangdong Kong,2 Sheng-Min Zhang,1 In-Seop Lee2,3

1Advanced Biomaterials and Tissue Engineering Center, Huazhong University of Science and Technology, Wuhan, People’s Republic of China; 2Bio-X Center, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou, People’s Republic of China; 3Institute of Natural Sciences, Yonsei University, Seoul, Korea

Abstract: In this study, to improve the osseointegration of implants, osteogenic growth peptide (OGP) and fibronectin (FN) were loaded within mineral, which was formed on titanium, through adsorption and coprecipitation methods. The release profiles of OGP loaded by either adsorption or coprecipitation and the effects of the loading methods to immobilize OGP with and without FN on rat mesenchymal stem cell (rMSC) osteogenic differentiation were studied. The coprecipitation approach slightly reduced the initial burst release, while the adsorption approach provided a more sustained release. Dual loading of OGP and FN further improved cell attachments compared with either OGP or FN alone. Dually loaded OGP and FN also had a positive impact on rMSC proliferation and osteogenic differentiation. The difference in methods of loading OGP with and without FN also had some effects on osteogenic differentiation. Compared with coprecipitated OGP alone, adsorbed OGP enhanced later differentiation, such as osteocalcin secretion and matrix mineralization. Simultaneously adsorbed OGP and FN led to higher proliferation and higher osteogenic differentiation in both early and late stages compared with sequentially loaded OGP and FN. rMSC culture clearly indicated that simultaneously adsorbed OGP and FN could improve osseointegration, and this treatment represents a potential method for effective surface modification of dental and orthopedic implants.

Keywords: coprecipitation, adsorption, osseointegration

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