School of Dentistry, The University of Queensland, Herston, QLD, 4006, Australia.
Centre for Orofacial Regeneration, Reconstruction and Rehabilitation (COR3), Herston, QLD, 4006, Australia.
Drug Deliv Transl Res. 2024 Dec;14(12):3371-3384. doi: 10.1007/s13346-023-01457-x. Epub 2023 Nov 20.
Besides enhancing osseo- and soft tissue integration, modulating inflammation at the implant site is also crucial for dental implant success. Uncontrolled peri-implant inflammation can cause significant loss of surrounding tissue and implant failure. It was recently shown that microvesicles (MVs), a less-studied type of extracellular vesicles, play a crucial role in cell-to-cell communication and may modulate angiogenesis and inflammatory response. The effect of MVs on regulating inflammation at an implant site, however, remains unexplored. In the current study, MVs were isolated and characterised from human primary gingival fibroblasts (hGFs) and loaded within titania nanotubes (TNTs, fabricated via anodisation on 3D Ti wire implants) towards their local release. The modified implants were characterised using SEM and confocal imaging to confirm the loading and local release of MVs from TNTs. In vitro studies demonstrated the internalisation of hGFs-MVs by human gingival keratinocytes (OKF6/TERT2 cell line), which caused a significant reduction in the production of pro-inflammatory cytokines. The results support MVs-releasing TNTs as a promising implant surface modification strategy to reduce inflammation, paving the way for further advancements in therapeutic dental implants.
除了增强骨和软组织整合外,调节种植体部位的炎症对于种植牙的成功也至关重要。未得到控制的种植体周围炎症会导致周围组织和种植体的大量丧失和失败。最近研究表明,微泡(MVs)是一种研究较少的细胞外囊泡类型,在细胞间通讯中起着关键作用,并可能调节血管生成和炎症反应。然而,MVs 对调节种植体部位炎症的影响仍未得到探索。在本研究中,从人原代牙龈成纤维细胞(hGFs)中分离和表征微泡,并将其载入二氧化钛纳米管(TNTs,通过在 3D Ti 丝植入物上进行阳极氧化制备)中,以实现其局部释放。使用 SEM 和共聚焦成像对修饰后的植入物进行了表征,以确认 TNTs 中 MV 的加载和局部释放。体外研究表明,hGFs-MVs 被人牙龈角质形成细胞(OKF6/TERT2 细胞系)内化,这导致促炎细胞因子的产生显著减少。研究结果支持释放 MVs 的 TNTs 作为一种有前途的植入物表面改性策略,可减少炎症,为治疗性种植牙的进一步发展铺平道路。