装载L-氨酸和Ca2+的形状记忆骨螺丝传播机械刺激,激活骨细胞并增强骨再生
Huaqian Liu1, Weiwei Zhao2,3, Yuhe Yang1
1Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, 999077, China.
Bioactive materials
|July 28, 2025
概括
这项研究介绍了一种新型的热敏形状记忆骨螺丝,可以增强骨再生. 螺丝可以改善固定,并通过合骨形成和血管生长来促进愈合.
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.
- 整形外科手术 整形外科手术
背景情况:
- 金属骨螺丝缺乏最佳的骨整合和组织支持,限制了它们在骨缺陷治疗中的有效性.
- 目前的固定方法往往无法充分促进骨再生和血管化.
研究的目的:
- 开发一种新型的热响应形状记忆 (SMP) 骨螺丝,旨在通过结合骨质生成和血管生成来增强骨再生.
- 提高骨折治疗骨螺丝的内部固定能力和治疗效果.
主要方法:
- 使用形状记忆聚氨/酸 (PU/HA) 复合物通过压制造制造SMP骨螺丝.
- 用L-氨酸 (Arg) 和离子 (Ca2+) 覆盖SMP骨螺丝,以促进受控释放.
- 研究热反应性质 (在37°C时恢复形状) 和机械性能 (拉出力).
- 评估L-氨酸和离子释放对细胞信号通路 (NO-cGMP,PI3K-Akt) 的协同作用,以及它们在协调骨质生成和血管生成中的作用.
主要成果:
- SMP骨螺丝表现出热敏形状记忆行为,在25°C缩小,在37°C恢复.
- 显示拉出力增加2倍,表明强大的内部固定和有益的压力.
- 长期释放的L-氨酸和离子协同激活细胞信号通路,促进骨质生成和血管生成.
- SMP骨螺丝有效地协调了骨形成和血管化,在机械刺激下加速了骨的修复.
结论:
- 开发的热敏形状记忆骨螺丝提供了改进的固定和增强的骨再生能力.
- 形状记忆特性和骨质生成-血管生成合的结合为临床骨螺丝开发提供了一个有前途的方法.
- 这种新的设计解决了传统金属螺丝的局限性,为先进的骨科治疗铺平了道路.
更多相关视频
09:35Distinctive Capillary Action by Micro-channels in Bone-like Templates can Enhance Recruitment of Cells for Restoration of Large Bony Defect
Published on: September 11, 2015
9.8K
08:28A Lab-On-A-Chip Platform for Stimulating Osteocyte Mechanotransduction and Analyzing Functional Outcomes of Bone Remodeling
Published on: May 21, 2020
6.8K
相关概念视频
01:31Essential Minerals for Bone Health
4.4K
The minerals contained in all of the food we consume are essential for our organ systems. However, certain essential minerals, such as calcium, phosphorus, magnesium, manganese, and fluoride, largely affect bone health.
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
4.4K
01:40Bone Remodeling
38.5K
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.
38.5K
01:18The Bone Matrix
4.5K
Bone contains a relatively small number of cells entrenched in a matrix of collagen fibers that provide an adherent surface for inorganic salt crystals. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Without collagen, bones would be brittle and shatter easily. Without mineral crystals, bones would flex and provide little support. This can be observed by an experiment: when the minerals of a bone are dissolved by soaking the bone in...
4.5K
01:29Bone Disorders
4.0K
Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
4.0K
01:17Hormones and Bone Tissue
2.9K
The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
2.9K
01:31Osteoclasts in Bone Remodeling
3.2K
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...
3.2K