充满含铜生物活性玻璃的注射微球通过调节炎症和招募干细胞来改善关节软骨的愈合
Hua Gao1, Eryu Ning1, Xiaoyu Zhang1
1Orthopedics and Sports Medicine Center, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Suzhou 215008, P. R. China.
Regenerative biomaterials
|January 23, 2025
概括
这项研究引入了用于骨关节炎 (OA) 细胞治疗的新型多孔微球 (PMs@CuBG). 这些微球通过指导介质干细胞 (MSCs) 来减少炎症并促进软骨修复.
科学领域:
- 生物材料科学 生物材料科学
- 再生医学是一种再生医学.
- 整形外科 整形外科 整形外科
背景情况:
- 骨关节炎 (OA) 是一种普遍的骨科疾病,导致患者显著的发病率.
- 目前OA的局部细胞疗法面临着由于炎症环境和干细胞可用性的局限性.
- 开发先进的传递系统对于在OA治疗中有效的局部细胞疗法至关重要.
研究的目的:
- 设计和评估新型可注射多孔微球 (PMs@CuBG),用于支持在骨关节炎中在位介质干细胞 (MSC) 治疗.
- 评估微球调节炎性微环境的能力,并招募/区分MSC用于软骨修复.
- 为了研究PMs@CuBG在骨关节炎的体内大鼠模型中的治疗疗效.
主要方法:
- 使用微流体技术制造可注射的多孔微球 (PMs),其中包括聚乳糖酸共聚合物,卡托基因,聚多巴胺,树皮细胞衍生因子-1和合铜的生物活性玻璃 (CuBG).
- 对PMs@CuBG生物相容性,巨细胞表型调节 (M1至M2) 和MSC招募/合原体差异化的实体评估.
- 在鼠标骨关节炎模型中PMs@CuBG的体内评估,评估OARSI得分,亚格拉干含量和II型原体表达.
主要成果:
- 通过CuBG释放,PMs@CuBG表现出生物相容性,并通过促进M2巨细胞两极分化,有效降低关节炎症.
- 微球成功地将MSC招募到关节中,并促进它们分化为软骨细胞,帮助软骨修复.
- 在OA老鼠中,对PMs@CuBG的关节内注射显著改善了软骨完整性,由降低的OARSI得分和增加的aggrecan和Col-2α表达证明.
结论:
- PMs@CuBG微球代表了一种有前途的生物材料,用于增强骨关节炎的现场MSC治疗.
- 这种方法有效地解决了OA细胞疗法的关键挑战,包括炎症控制和干细胞归属/分化.
- PMs@CuBG为治疗关节软骨损伤和骨关节炎提供了一种新且可能成功的策略.
相关概念视频
01:40Bone Remodeling
Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
01:27Fractures: Bone Repair
Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...
01:31Bone Remodeling and Repair
Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...