College of Life Sciences, Northwest University, Xi'an 710069, China.
State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Clinical Research Center for Oral Diseases, Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an 710032, China.
ACS Biomater Sci Eng. 2024 Nov 11;10(11):7030-7042. doi: 10.1021/acsbiomaterials.4c00133. Epub 2024 Jun 29.
In addition to transmitting and carrying genetic information, RNA plays an important abiotic role in the world of nanomaterials. RNA is a natural polyanionic biomacromolecule, and its ability to promote osteogenesis by binding with other inorganic materials as an osteogenic induction agent was discovered only recently. However, whether it can promote osseointegration on implants has not been reported. Here, we investigated the effect of the RNA-containing coating materials on peri-implant osseointegration. Total RNA extracted from rat muscle tissue was used as an osteogenic induction agent, and hyaluronic acid (HA) was used to maintain its negative charge. In simulated body fluids (SBF), in vitro studies demonstrated that the resulting material encouraged calcium salt deposition. Cytological experiments showed that the RNA-containing coating induced greater cell adhesion and osteogenic differentiation in comparison to the control. The results of animal experiments showed that the RNA-containing coating had osteoinductive and bone conduction activities, which are beneficial for bone formation and osseointegration. Therefore, the RNA-containing coatings are useful for the surface modification of titanium implants to promote osseointegration.
除了传递和携带遗传信息外,RNA 在纳米材料的世界中还具有重要的非生物作用。RNA 是一种天然的聚阴离子生物大分子,最近才发现它具有与其他无机材料结合作为成骨诱导剂促进成骨的能力。然而,它是否能促进植入物上的骨整合尚未有报道。在这里,我们研究了含 RNA 的涂层材料对种植体周围骨整合的影响。从大鼠肌肉组织中提取的总 RNA 被用作成骨诱导剂,透明质酸 (HA) 用于保持其负电荷。在模拟体液 (SBF) 中,体外研究表明,所得到的材料促进了钙盐的沉积。细胞学实验表明,与对照组相比,含 RNA 的涂层诱导了更大的细胞黏附和成骨分化。动物实验结果表明,含 RNA 的涂层具有成骨活性和骨传导活性,有利于骨形成和骨整合。因此,含 RNA 的涂层可用于促进钛植入物骨整合的表面改性。