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相关概念视频

The Extracellular Matrix01:42

The Extracellular Matrix

Overview
Bone Remodeling01:40

Bone 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.
Mesenchymal Stem Cells01:19

Mesenchymal Stem Cells

Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their access...
Introduction to Fibroblasts01:09

Introduction to Fibroblasts

Rudolph Virchow discovered spindle-shaped cells called fibroblasts in 1858. Inactive fibroblasts, called fibrocytes, become activated by various stimuli, such as growth factors and inflammatory cytokines. Activated fibroblasts play a crucial role in wound healing, inflammation, formation of new blood vessels, and cancer progression. Uncontrolled activation of fibroblasts results in fibrosis, the excess deposition of fibrous tissue, which can lead to scarring and affect normal organs. This...
The Extracellular Matrix01:29

The Extracellular Matrix

Overview
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.
Composition of the Extracellular Matrix
The extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse...
Bone Remodeling and Repair01:31

Bone 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...

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多功能骨再生膜具有灵活性,电刺激活动和骨诱导活动.

Shihao Zhang1, Lei Huang2, Mengxuan Bian2

  • 1The Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Engineering Research Center for Biomedical Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China.

Small (Weinheim an der Bergstrasse, Germany)
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概括

这项研究引入了一种用于骨再生的新型多功能膜. P/T/MXene膜结合了弹性,电刺激和骨诱导性质,有效地促进骨缺陷的修复.

关键词:
生物活性物质是生物活性物质.骨再生 骨再生电刺激是一种电刺激.骨质诱导性活动.

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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.
  • 再生医学是一种再生医学.

背景情况:

  • 指导骨再生 (GBR) 对于修复关键大小的骨缺陷至关重要.
  • 现有的GBR膜往往缺乏最佳骨再生的多功能性.
  • 开发具有集成功能的先进膜对于改善临床结果至关重要.

研究的目的:

  • 开发一种多功能,纳米可吸收的复合膜,用于增强骨再生.
  • 研究电刺激 (ES),骨诱导颗粒和导电纳米材料对骨修复的协同效应.
  • 评估开发的膜用于指导组织再生的体外和体内疗效.

主要方法:

  • 使用静电线制造,用β-TCP颗粒和MXene纳米材料 (P/T/MXene) 合的聚乳酸碳酸盐 (PDT) 复合纳米可吸收膜.
  • 在实验室中评估膜对骨髓介质干细胞 (BMSC) 招募和骨质分化在ES下的影响.
  • 在体外评估膜对内皮细胞血管生成能力的影响.
  • 在大鼠骨缺陷模型中对P/T/MXene膜进行体内测试.

主要成果:

  • P/T/MXene膜表现出理想的特性,包括温度灵敏度,弹性记忆力和协调的降解概况.
  • 在体外研究表明,在ES下,增强了BMSC骨质分化和内皮细胞血管生成.
  • 在体内实验证实了用P/T/MXene膜治疗的头骨缺陷的显著骨再生.
  • 膜组件和ES的协同作用通过新血管化促进了骨再生.

结论:

  • 开发的P/T/MXene膜通过协同的多功能效应有效地促进骨再生.
  • 膜的柔性弹性,ES和骨诱导活性的组合显示出引导组织再生的巨大潜力.
  • 这项研究为设计用于修复骨缺陷的先进生物材料提供了宝贵的见解.