Titanate nanowire scaffolds decorated with anatase nanocrystals show good protein adsorption and low cell adhesion capacity

Abstract

Xianglong Ding,1 Xiaoqin Yang,2 Lei Zhou,1 Haibin Lu,1 Shaobing Li,1 Yan Gao,1 Chunhua Lai,1 Ying Jiang11Center of Oral Implantology, 2Department of Oral and Maxillofacial Surgery, Guangdong Provincial Stomatological Hospital, Southern Medical University, Guangzhou, People's Republic of ChinaBackground and methods: In this report, layered microporous titanate nanowire scaffolds (TiNWs) were constructed via a hydrothermal route and then decorated with anatase nanocrystals (ANs@TiNWs) by immersion in TiCl4 solution. The diameter and specific surface area of the ANs@TiNWs was measured. The TiNWs and ANs@TiNWs were then compared for their ability to adsorb protein and adhere to MG63 cells.Results: The diameter and specific surface area of the ANs@TiNWs were significantly larger than for TiNWs, and the ANs@TiNWs had an enhanced protein-adsorbing effect. It was found that the MG63 cells were less able to adhere to the flat titanium substrate than the TiNWs and ANs@TiNWs, and that this cell-repellant ability was greater with ANs@TiNWs. Other MG63 cell functions, proliferation in particular, were also inhibited by [email protected]: ANs@TiNWs show a high protein adsorption and cell-repellant capacity which would be useful in drug delivery.Keywords: protein adsorption, antiadhesion, nanotopography, drug delivery