Svarca Alise, Grava Andra, Dubnika Arita, Ramata-Stunda Anna, Narnickis Raimonds, Aunina Kristine, Rieksta Eleonora, Boroduskis Martins, Jurgelane Inga, Locs Janis, Loca Dagnija
Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Riga, Latvia.
Baltic Biomaterials Centre of Excellence, Headquarters at Riga Technical University, Riga, Latvia.
Front Bioeng Biotechnol. 2022 Jul 5;10:917765. doi: 10.3389/fbioe.2022.917765. eCollection 2022.
Despite the bone ability of self-regeneration, large bone defects require surgical intervention. Likewise, when it comes to osteoporotic bone fractures, new approaches should be considered a supportive mechanism for the surgery. In recent years, more and more attention has been attracted to advanced drug delivery systems for local osteoporosis treatment, combining appropriate biomaterials with antiosteoporotic drugs, allowing simultaneously to regenerate the bone and locally treat the osteoporosis. Within the current research, hyaluronic acid/strontium ranelate (HA/SrRan), HA/calcium phosphate nanoparticles (HA/CaP NPs), and HA/CaP NPs/SrRan hydrogels were prepared. The effect of CaP and SrRan presence in the composites on the swelling behavior, gel fraction, molecular structure, microstructure, and SrRan and Sr release, as well as cell viability was evaluated. Obtained results revealed that the route of CaP nanoparticle incorporation into the HA matrix had a significant effect on the hydrogel gel fraction, rheological properties, swelling behavior, and microstructure. Nevertheless, it had a negligible effect on the release kinetics of SrRan and Sr. The highest cell (3T3) viability (>80%) was observed for HA hydrogels, with and without SrRan. Moreover, the positive effect of SrRan on 3T3 cells was also demonstrated, showing a significant increase (up to 50%) in cell viability if the used concentrations of SrRan were in the range of 0.05-0.2 μg/ml.
尽管骨骼具有自我再生能力,但大面积骨缺损仍需要手术干预。同样,对于骨质疏松性骨折,新方法应被视为手术的一种支持机制。近年来,用于局部骨质疏松症治疗的先进药物递送系统越来越受到关注,该系统将合适的生物材料与抗骨质疏松药物相结合,能够同时实现骨再生和局部治疗骨质疏松症。在当前研究中,制备了透明质酸/雷奈酸锶(HA/SrRan)、HA/磷酸钙纳米颗粒(HA/CaP NPs)以及HA/CaP NPs/SrRan水凝胶。评估了复合材料中CaP和SrRan的存在对溶胀行为、凝胶分数、分子结构、微观结构以及SrRan和Sr的释放,还有细胞活力的影响。所得结果表明,CaP纳米颗粒掺入HA基质的途径对水凝胶的凝胶分数、流变学性质、溶胀行为和微观结构有显著影响。然而,它对SrRan和Sr的释放动力学影响可忽略不计。对于含和不含SrRan的HA水凝胶,观察到最高的细胞(3T3)活力(>80%)。此外,还证明了SrRan对3T3细胞的积极作用,即如果使用的SrRan浓度在0.05 - 0.2μg/ml范围内,细胞活力会显著增加(高达50%)。