West China Journal of Stomatology ›› 2023, Vol. 41 ›› Issue (2): 165-174.doi: 10.7518/hxkq.2023.2022354

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Effect of graphene-oxide-modified osteon-like concentric microgrooved surface on the osteoclastic differentiation of macrophages

Wang Hong(), Wu Qinglin, Lai Yingzhen(), Cai Yihuang.   

  1. Dept. of Stomatology, Xiamen Medical College & Engineering Research Center of Fujian University for Stomatological Biomaterials, Xiamen 361023, China
  • Received:2022-09-11 Revised:2022-12-24 Online:2023-04-01 Published:2023-04-14
  • Contact: Lai Yingzhen E-mail:1044346954@qq.com;dentistyz@126.com
  • Supported by:
    Natural Science Foundation of Fujian Province(2022J011408);The Natural Science Foundation of Xiamen Medical College(K2021-06);The Xiamen Medical and Health Guidance Project(3502Z20214ZD1318);Correspondence: Lai Yingzhen, E-mail: dentistyz@126.com

Abstract:

Objective This study aimed to investigate the effect of new biomimetic micro/nano surfaces on the osteoclastic differentiation of RAW264.7 macrophages by simulating natural osteons for the design of concentric circular structures and modifying graphene oxide (GO). Methods The groups were divided into smooth titanium surface group (SS), concentric microgrooved titanium surface group (CMS), and microgroove modified with GO group (GO-CMS). The physicochemical properties of the material surfaces were studied using scanning electron microscopy (SEM), contact-angle measurement, atomic force microscopy, X-ray photoelectron spectroscopy analysis, and Raman spectroscopy. The effect of the modified material surface on the cell biological behavior of RAW264.7 was investigated by cell-activity assay, SEM, and laser confocal microscopy. The effect on the osteoclastic differentiation of macrophages was investiga-ted by tartrate-resistant acid phosphatase (TRAP) immunofluorescence staining and quantitative real-time polymerase chain reaction (qRT-PCR) experiments. Results Macrophages were arranged in concentric circles along the microgrooves, and after modification with GO, the oxygen-containing groups on the surface of the material increased and hydrophilicity increased. Osteoclasts in the GO-CMS group were small in size and number and had the lowest TRAP expression. Although it promoted the proliferation of macrophages in the GO-CMS group, the expression of osteoclastic differentiation-related genes was lower than that in the SS group, and the difference was statistically significant (P<0.05). Conclusion Concentric circular microgrooves restricted the fusion of osteoclasts and the formation of sealing zones. Osteomimetic concentric microgrooves modified with GO inhibited the osteoclastic differentiation of RAW 264.7 macrophages.

Key words: osteomimetic, concentric microgroove, graphene oxide, macrophages, osteoclastic differentiation

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