在骨缺陷处理中应用一种具有异化物含量的仿生矿化骨基架
Qian Wang1, Xu Fang2, Aihua Feng3
1Department of Spine Surgery, Shanghai East Hospital, Tongji University School of Medicine Shanghai China.
RSC advances
|August 27, 2025
概括
这项研究开发了一种新型药物载体矿化原体支架,用于修复骨缺陷. 在动物模型中,脚手架表现出持续的药物释放,抗结核的抗菌特性,并促进骨愈合.
科学领域:
- 生物材料科学
- 复原医学
- 骨科手术
背景情况:
- 骨缺陷需要有效的修复策略,
- 目前感染骨缺陷的治疗方法在同时控制感染和骨再生方面面临挑战.
- 需要先进的生物材料来提供抗感染药物并支持骨愈合.
研究的目的:
- 构建一个纳米尺度,药物装载的矿物化原体支架使用异酸盐,酸,和I型原体.
- 评估开发的脚手架的物理化学,抗感染和骨质性质.
- 评估脚手架在动物模型中修复受感染的骨缺陷的有效性.
主要方法:
- 生物模拟矿物化用于组装含药物矿化原体支架.
- 架构的特征包括场辐射扫描电子显微镜 (SEM) 和X射线衍射 (XRD).
- 在体外的抗感染测试包括与Mycobacterium tuberculosis共同培养;在体内的研究包括在小鼠和老鼠中植入以进行降解,药物释放,骨质生成 (微型CT) 和生物相容性 (HE染色) 评估.
主要成果:
- 药物装载的脚手架显示药物装载率为6.25%和捕获效率为54%.
- 在试验室研究显示,药物加载组中,Mycobacterium结核病的生长在8周内被显著抑制.
- 在老鼠骨缺陷模型中,体内评估证实了持续的药物释放,生物降解性,生物相容性和骨质性潜力.
结论:
- 研发的生物模拟矿物化原基架具有持续释放性,生物降解性,抗菌效力,生物相容性和骨质性潜力.
- 这种新的脚手架显然有望有效修复受感染的骨缺陷.
- 这些发现支持这种支架作为具有挑战性的骨再生病例的先进治疗选择.
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.
01:31Osteoclasts in Bone Remodeling
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...
01:27Compact Bone
Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
01:29Bone Formation by Intramembranous Ossification
Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...
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...