Centre for Functional and Surface Functionalized Glass, TnUAD, 911 01 Trenčín, Slovakia.
Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany.
J Mater Chem B. 2024 Feb 14;12(7):1875-1891. doi: 10.1039/d3tb01568h.
Mesoporous bioactive glass (MBG) is widely acknowledged in bone tissue engineering due to its mesoporous structure, large surface area, and bioactivity. Recent research indicates that introduction of metallic ions has beneficial impacts on bone metabolism and angiogenesis. Thus, the features of MBG can be modified by incorporating combinations of ions, such as magnesium (Mg) and copper (Cu), which can play a considerable role in bone formation, influencing angiogenesis, osteogenesis, as well as antibacterial properties. In this study, Mg and Cu were co-doped for the first time (in a ratio of 1 : 1) in 80SiO-5PO-(15 - 2)CaO-MgO-CuO glass composition with = 0, 0.5, 1, and 2 mol%, synthesized using the sol-gel and evaporation-induced self-assembly method. X-ray diffraction analysis confirmed the amorphous nature of the powders, while inductively coupled plasma-optical emission spectrometry verified the existence of dopant ions in the respective amounts. The nitrogen sorption method indicated the formation of uniform cylindrical mesopores which are open at both ends and a high surface area of the powders. TEM images show fringes, indicating an ordered mesoporous structure in all MgCu co-doped systems. bioactivity was observed in all MBG powders, confirmed by the formation of an apatite phase when placed in simulated body fluid (SBF). Flake-like microstructure characteristics of HAp crystals found on the surface of MBG powders were visualized using FESEM. Cytotoxicity tests at lower concentrations (0.1 and 1 wt/vol%) of co-doped 2MC MBG (co-doping up to 2 mol%) showed cell proliferation and viability of osteoblast-like MG-63 cells and normal human dermal fibroblast (NHDF) cells similar to the basic glass 80S. Antibacterial study of MBG pellets showed an increment in the zone of inhibition with the sequential addition of doping ions. The turbidity measurement of bacterial cultures revealed that the optimal concentration for effectively inhibiting bacterial growth was 1 wt/vol% (, 10 mg mL) concentration of MBG extracts. The result suggested that the incorporation of Mg and Cu ions in MBG in lower concentrations of up to 2 mol% can be useful in bone regeneration owing to bioactivity, cell proliferation, and antibacterial characteristics.
介孔生物活性玻璃(MBG)由于其介孔结构、大比表面积和生物活性,在骨组织工程中得到了广泛的认可。最近的研究表明,引入金属离子对骨代谢和血管生成有有益的影响。因此,可以通过掺入离子组合来修饰 MBG 的特性,例如镁(Mg)和铜(Cu),它们在骨形成中可以发挥重要作用,影响血管生成、成骨和抗菌性能。在这项研究中,首次(摩尔比为 1:1)将 Mg 和 Cu 共掺杂到 80SiO-5PO-(15-2)CaO-MgO-CuO 玻璃组成中,其中 = 0、0.5、1 和 2 mol%,使用溶胶-凝胶和蒸发诱导自组装方法合成。X 射线衍射分析证实了粉末的非晶态性质,而电感耦合等离子体-光学发射光谱法验证了掺杂离子的存在及其各自的量。氮气吸附法表明形成了均匀的圆柱介孔,这些介孔在两端都是开放的,粉末具有高比表面积。TEM 图像显示了条纹,表明所有 MgCu 共掺杂体系中都存在有序介孔结构。所有 MBG 粉末均表现出生物活性,这通过在模拟体液(SBF)中放置时形成磷灰石相得到证实。在 MBG 粉末表面发现的 HAp 晶体呈片状微观结构特征,使用 FESEM 进行了可视化。在较低浓度(0.1 和 1wt/vol%)的共掺杂 2MC MBG(共掺杂高达 2mol%)中进行的细胞毒性试验表明,成骨样 MG-63 细胞和正常人类真皮成纤维细胞(NHDF)的细胞增殖和活力与基本玻璃 80S 相似。MBG 丸剂的抗菌研究表明,随着掺杂离子的顺序添加,抑菌圈的面积增加。细菌培养物的浊度测量表明,有效抑制细菌生长的最佳浓度为 1wt/vol%(,10mgmL)MBG 提取物的浓度。结果表明,在低浓度下(高达 2mol%)掺入 MBG 中的 Mg 和 Cu 离子在骨再生方面可能具有生物活性、细胞增殖和抗菌特性。
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