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Effects of titania nanotubes with or without bovine serum albumin loaded on human gingival fibroblasts

Authors Liu X, Zhou X, Li S, Lai R, Zhou Z, Zhang Y, Zhou L

Received 7 October 2013

Accepted for publication 6 December 2013

Published 6 March 2014 Volume 2014:9(1) Pages 1185—1198

DOI https://doi.org/10.2147/IJN.S55514

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Xiangning Liu,1,* Xiaosong Zhou,2,* Shaobing Li,3 Renfa Lai,1 Zhiying Zhou,1 Ye Zhang,1 Lei Zhou3

1The First Affiliated Hospital of Jinan University, Guangzhou, 2Chemistry Science and Technology School, Zhanjiang Normal University, Zhanjiang, 3Guangdong Provincial Stomatological Hospital, Southern Medical University, Guangzhou, People's Republic of China

*These authors contributed equally to this work

Abstract: Modifying the surface of the transmucosal area is a key research area because this process positively affects the three functions of implants: attachment to soft tissue, inhibiting bacterial biofilm adhesion, and the preservation of the crestal bone. To exploit the potential of titania nanotube arrays (TNTs) with or without using bovine serum albumin (BSA) to modify the surface of a dental implant in contact with the transmucosal area, BSA was loaded into TNTs that were fabricated by anodizing Ti sheets; the physical characteristics of these arrays, including their morphology, chemical composition, surface roughness, contact angle, and surface free energy (SFE), were assessed. The effect of Ti surfaces with TNTs or TNTs-BSA on human gingival fibroblasts (HGFs) was determined by analyzing cell morphology, early adhesion, proliferation, type I collagen (COL-1) gene expression, and the extracellular secretion of COL-1. The results indicate that early HGF adhesion and spreading behavior is positively correlated with surface characteristics, including hydrophilicity, SFE, and surface roughness. Additionally, TNT surfaces not only promoted early HGF adhesion, but also promoted COL-1 secretion. BSA-loaded TNT surfaces promoted early HGF adhesion, while suppressing late proliferation and COL-1 secretion. Therefore, TNT-modified smooth surfaces are expected to be applicable for uses involving the transmucosal area. Further study is required to determine whether BSA-loaded TNT surfaces actually affect closed loop formation of connective tissue because BSA coating actions in vivo are very rapid.

Keywords: titania nanotubes, bovine serum albumin, modified surface, transmucosal area, human gingival fibroblast

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