恢复关节软骨:从结构,组成和发育的见解
Alba Pueyo Moliner1,2, Keita Ito2,3, Frank Zaucke4
1Regenerative Medicine Center Utrecht, Utrecht, the Netherlands.
Nature reviews. Rheumatology
|March 29, 2025
概括
了解关节软骨的发育是恢复受伤后关节功能的关键. 使用生物制造模拟其复杂的原蛋白质基质,可以创建用于软骨修复的耐用植入物.
科学领域:
- 生物材料科学 生物材料科学
- 组织工程是组织工程.
- 发展生物学 发展生物学
背景情况:
- 关节软骨具有独特的机械特性,这是由于其有组织的细胞外基质 (ECM),主要是II型原和蛋白质糖.
- 这种ECM结构对于关节功能至关重要,但软骨容易受伤和退化,目前的治疗方法往往无法恢复机械完整性.
- 复制复杂的原蛋白-蛋白质甘网络是可持续组织恢复的重大挑战.
研究的目的:
- 探索关节软骨ECM的发育过程.
- 为设计基于生物材料的软骨修复疗法提供信息.
- 为了利用生物制造技术来创建耐用的关节软骨植入物.
主要方法:
- 在软骨发育过程中研究II型原体网络的生物合成,纤维生成和自我组装.
- 分析蛋白质甘氨酸和其他ECM成分在塑造软骨结构中的作用.
- 整合发育原则与生物制造技术来创建植入物.
主要成果:
- 关节软骨的发育涉及复杂的ECM组装,对于机械耐用性至关重要.
- 了解ECM发展提供了关于组织再生策略的见解.
- 生物制造技术为设计功能性软骨植入物提供了一条途径.
结论:
- 对关节软骨发育的更深入的理解对于创建有效的治疗策略至关重要.
- 基于生物材料的疗法,以发育生物学为基础,可以改善软骨修复结果.
- 将基础生物学知识与工程创新结合起来,可以产生更耐用的3D植入物,用于关节软骨修复.
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.
01:27Growth of Cartilage and Bone Tissue
Chondrocytes form a temporary cartilaginous model by dividing and secreting a thick gel-like extracellular matrix. Once the chondrocytes undergo programmed cell death, osteoblasts enter the site of the cartilaginous model. The process of replacing the temporary cartilaginous model with bone in an ordered manner is called endochondral ossification. In endochondral ossification, not all of the cartilage is replaced by bone tissue. Some cartilage that performs a protective and supportive function...
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...
01:16Structural Joints: Synovial Joints
Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...
01:07Development of the Limb Synovial Joints
Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
01:24Bone Formation by Endochondral Ossification
Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...