精确调节的物理交叉连接载体能够协同释放生物活性因子,用于MSC介导的软骨再生
Yun Dou1, Fangxue Zhang1, Zhiruo Jiang1
1Department of Sports Medicine, Peking University Third Hospital, Institute of Sports Medicine of Peking University, Beijing, 100191, China.
Bioactive materials
|February 2, 2026
概括
这项研究引入了一种用于控制药物输送的丝纤维蛋白平台,通过招募和分化干细胞来增强软骨修复. 生物材料平台实现高密度介质干细胞 (MSC) 招募,并促进质软骨再生.
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.
- 组织工程是组织工程.
背景情况:
- 关节软骨的修复受到其无血管性质的限制.
- 成功的软骨再生需要干细胞招募,适当的微环境和足够的时间.
- 目前的策略往往难以实现协调的细胞招募和分化.
研究的目的:
- 开发一种生物相容的丝纤维蛋白平台,用于可调节的药物释放动力学.
- 调查该平台在招募和分化介质干细胞 (MSCs) 进行软骨修复方面的有效性.
- 为了实现协同交付促进招募和促进差异化剂,以增强质软骨再生.
主要方法:
- 通过冷组装制造一个物理交叉连接的丝纤维素平台,具有可调节的β-sheet内容.
- 纳入和控制释放水友性 (MSC亲和,MAP) 和疏水性 (kartogenin,KGN) 药物.
- 在大鼠软骨缺陷模型中评估平台,评估MSC招募密度和软骨再生.
主要成果:
- 该平台能够在135天内精确调整药物释放动力学,而无需使用化学交叉链接器.
- 持续21天的MAP释放特征显著增加了MSC招募 (∼2.34 × 104细胞/mm3).
- 同时提供MAP和KGN促进了强大的质软骨再生,可能通过Cdh2和p38 MAPK通路.
结论:
- 丝纤维素平台提供了一个结构可编程和可扩展的策略,用于精确的生物材料设计.
- 该系统实现了协调,高密度的MSC招募和时间差异化,以有效地修复软骨.
- 这种方法推进了开发用于组织再生的先进生物材料的范式.
相关概念视频
Carrier-Mediated Transport
1.3K
Carrier-mediated transport is a pivotal process in drug absorption, particularly for lipid-insoluble drugs, and encompasses facilitated diffusion and active transport. Facilitated diffusion allows drugs to move along their concentration gradient without energy expenditure, while active transport utilizes ATP to drive drug movement against this gradient.
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...
1.3K
Electron Carriers
91.8K
Electron carriers can be thought of as electron shuttles. These compounds can easily accept electrons (i.e., be reduced) or lose them (i.e., be oxidized). They play an essential role in energy production because cellular respiration is contingent on the flow of electrons.
Over the many stages of cellular respiration, glucose breaks down into carbon dioxide and water. Electron carriers pick up electrons lost by glucose in these reactions, temporarily storing and releasing them into the electron...
Over the many stages of cellular respiration, glucose breaks down into carbon dioxide and water. Electron carriers pick up electrons lost by glucose in these reactions, temporarily storing and releasing them into the electron...
91.8K
Factors Influencing Attraction II: Physical Attraction
255
Physical attractiveness plays a crucial role in shaping interpersonal attraction, influencing first impressions, social interactions, and long-term relationship dynamics. Psychological research consistently demonstrates that attractiveness affects social evaluations and behavioral outcomes in various contexts.Influence on Social InteractionsResearch has shown that individuals perceived as physically attractive often experience preferential treatment in social and professional settings. One...
255
Energy-releasing Steps of Glycolysis
146.8K
Glycolysis is divided into two phases based on whether energy is utilized or released. While the first phase consumes ATP, the second phase produces energy in the form of ATP and NADH. The energy is released over a sequence of reactions that turns G3P into pyruvate. The energy-releasing phase—steps 6-10 of glycolysis—occurs twice, once for each of the two 3-carbon sugars produced during steps 1-5 of the first phase.
The first energy-releasing step—the 6th step of glycolysis...
The first energy-releasing step—the 6th step of glycolysis...
146.8K
Drug Absorption Mechanism: Carrier-Mediated Membrane Transport
6.1K
Certain large, lipid-insoluble drug molecules that resemble amino acids, peptides, or glucose, require specialized carrier proteins to facilitate their diffusion across cell membranes. This transport can occur through either facilitated diffusion, which does not require energy input, or active transport, which does require energy input.
Facilitated diffusion is a passive process that utilizes human Solute Carrier (SLC) transporters. These transporters bind to the drug, undergo structural...
Facilitated diffusion is a passive process that utilizes human Solute Carrier (SLC) transporters. These transporters bind to the drug, undergo structural...
6.1K
Transcription Factors
82.7K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
82.7K


