高等学校化学学报 ›› 2024, Vol. 45 ›› Issue (3): 20230451.doi: 10.7503/cjcu20230451

• 研究论文: 无机化学 • 上一篇    下一篇

石墨烯介导巨噬细胞膜涂层的制备及对钛种植体防污和免疫调控性能的影响

雷嘉辉, 罗斌, 孙小庆, 张宇佳, 胡筱琴, 蓝芳(), 吴尧()   

  1. 四川大学国家生物医学材料工程技术研究中心
    2.分析测试中心, 成都 610064
  • 收稿日期:2023-10-26 出版日期:2024-03-10 发布日期:2023-12-28
  • 通讯作者: 蓝芳,吴尧 E-mail:fanglan@scu.edu.cn;wuyao@scu.edu.cn
  • 基金资助:
    国家自然科学基金(31971265);国家重点研发计划项目(2022YFC2406102)

Preparation of Graphene Mediated Macrophage Membrane Coating and Its Effects on the Anti-fouling and Immunomodulatory Properties of Tianium Implants

LEI Jiahui, LUO Bin, SUN Xiaoqing, ZHANG Yujia, HU Xiaoqin, LAN Fang(), WU Yao()   

  1. National Biomedical Materials Engineering Technology Research Center
    2.Analysis and Test Center,Sichuan University,Chengdu 610064,China
  • Received:2023-10-26 Online:2024-03-10 Published:2023-12-28
  • Contact: LAN Fang, WU Yao E-mail:fanglan@scu.edu.cn;wuyao@scu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(31971265);the National Key Research and Development Program of China(2022YFC2406102)

摘要:

钛种植体容易受到生物污染和炎症反应的影响, 从而导致骨融合不良甚至种植失败. 本文通过聚多巴胺将石墨烯固定于钛种植体表面, 然后利用石墨烯与M2型巨噬细胞膜之间极强的相互作用力, 将M2型巨噬细胞膜结合到氧化石墨烯层表面, 在宏观水平上制备了一种具有生物活性的细胞膜涂层. 该天然细胞膜涂层可以有效防止蛋白的非特异性吸附, 具有良好的抗生物污染性能. 同时, 由于天然细胞膜存在高细胞亲和力, 修饰上细胞膜涂层的钛种植体表现出良好的生物相容性. 此外, 采用免疫荧光和实时荧光定量聚合酶链式反应(RT-qPCR)对促炎因子(iNOS和TNF-α)和抗炎因子(IL-10和IL-1ra)进行了检测. 实验结果表明, 在炎症环境下, 修饰上M2型巨噬细胞膜涂层的钛种植体可诱导RAW264.7细胞向M2型极化, 具有优异的免疫调控能力. 因此, 这种依靠石墨烯与磷脂之间相互作用力的细胞膜涂层制备策略为解决钛种植体生物污染和炎症反应等问题提供了一种全新的思路.

关键词: 钛种植体, 石墨烯, 细胞膜涂层, 生物相容性, 免疫调控

Abstract:

Titanium implants are susceptible to biofouling and inflammatory reactions, which can lead to poor bone fusion and implant failure. In this paper, we fixed graphene to the surface of titanium implant by polydopamine and then bound the M2 macrophage membrane to the graphene surface via the extremely strong interaction force between graphene and phospholipid in the cell membrane to create a bioactive cell membrane coating at the macroscopic level. This homogeneous cell membrane coating has excellent resistance to biological contamination, which can effectively prevent non-specific adsorption of proteins. Titanium implants with cell membrane coatings showed excellent biocompatibility due to the high cellular affinity of native cell membranes. In addition, immunofluorescence and RT-qPCR(Real-time quantitative polymerase chain reaction) were used for detection of proinflammatory markers(iNOS, TNF-α) and anti-inflammatory markers(IL-10, IL-1ra). In an inflammatory environment, the experimental results showed that the modified cell membrane-coated titanium implants could induce the polarization of macrophages to M2 type and had excellent immunomodulatory ability. This cell membrane coating preparation strategy, relying on the interaction force between graphene and phospholipids, provides ideas for solving the problems of bio-contamination and inflammatory response of titanium implants.

Key words: Titanium implant, Graphene, Cell membrane coating, Biocompatibility, Immune regulation

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