[2022-Vol.19-Issue 6]Regulation of the Macrophage Phenotype on Titanium Metal by Surface Modifcation
Post: 2022-11-11 13:54  View:722

Journal of Bionic Engineering (2022) 19:1625–1636

Shibing Xiong1,2,3 · Xugang Lu1,2,3 · Rui Zuo1,2,3 · Ping Huang4  · Bangcheng Yang1,2,3

1 Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610064, China 

2 National Engineering Research Center for Biomaterials, Chengdu 610064, China 

3 Sichuan Guojia Biomaterials Co., Ltd, Chengdu 610064, China 

4 Panzhihua University, Panzhihua Int Res Inst Vanadium and Titanium, Panzhihua 617000, Sichuan, China

Abstract:The regulation of macrophage phenotype (M1/M2) is very important for tissue repair. The macrophage phenotypes could be afected by the physical and chemical parameters of implant surface. The aim of this study was to investigate the efects of surface modifcations of titanium metals on macrophage phenotype. The medical pure titanium metals (PT-Ti) subjected to Anodic Oxidation (AO-Ti), Sand Blasting/acid etching (SLA-Ti) and Plasma-sprayed HA coating (HA coating-Ti) were used for regulating the phenotype of macrophage. The results showed that the Raw264.7 cells of AO-Ti groups had no obvious pseudopodia and could spread evenly in all directions. The levels of IL-1β and TNF-α, which belong to pro-infammatory genes, expressed by the cells on AO-Ti groups were the lowest among all of the modifed titanium groups. But, the levels of IL-10 and TGF-β, which belong to anti-infammatory genes, expressed on AO-Ti groups were much higher than those on the other groups. Furthermore, the AO-Ti could regulate the expression of SOCS-1 and SOCS-3 to afect the active of NF-κB signaling. The gene expression results of macrophages showed that the AO-Ti was more conductive to inhibit the expression of M1-related genes and promote the expression of M2-related genes in an infammatory environment. The AO-Ti was more benefcial to tissue repair than other modifed titanium metals. The results showed that the anodic oxidation is an efective method to regulate the phenotype of macrophages. 

Keywords: Titanium · Dental implant · Bionic surface modifcation · Anti-infammatory · Macrophage phenotype1668146047204.png

The surface morphology of bioactive titanium

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