多巴胺结合甲基化凝水凝 - 物理,机械和生物特性
Weiwen Lu1, Maedeh Rahimnejad2, Beatriz Ometto Sahadi2,3
1Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI 48109, USA.
Gels (Basel, Switzerland)
|July 25, 2025
概括
新的GelMA-多巴胺合物显示出可注射组织粘合剂的前景,提供更好的粘合力和机械强度. 这些生物相容材料提供了接替代品,增强了伤口愈合和临床应用.
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.
- 聚合物化学 聚合物化学
背景情况:
- 是关闭组织的传统方法,但可能会引起患者的不适和并发症.
- 开发先进的组织粘合剂对于改善伤口愈合和最小侵入性手术至关重要.
- 甲基化凝 (GelMA) 是一个有前途的生物材料,但需要功能化来增强粘合性能.
研究的目的:
- 开发和描述GelMA-多巴胺合物作为新型注射组织粘合剂.
- 评估多巴胺结合对GelMA物理化学和机械性能的影响.
- 评估这些结合物的细胞兼容性和潜力,作为接替代品.
主要方法:
- 合成不同度的GelMA (5%,10%,15%) 与中等和高多巴胺 (DOPA) 结合.
- 评估膨胀比率,降解率,机械强度和粘附能力.
- 使用AlamarBlue测定和F-actin染色测定细胞活力和粘附性的细胞相容性评估.
主要成果:
- DOPA结合减少了胀和增加了生物降解,增强了功能组的释放.
- 10%高DOPA配方的GelMA表现出优越的粘附性和机械强度.
- 所有配方显示了适合注射和生物打印的剪切稀释行为;最佳配方在5分钟内实现了快速交叉链接.
- 在体外测定证实了7天的非细胞毒性和增加的代谢活性.
结论:
- 凝MA-多巴胺合物代表了接的可行替代品,提供可调节的特性和增强的性能.
- 最佳配方平衡了粘附性,凝度和快速交叉连接,以获得临床适用性.
- 这些新型粘合剂有可能改善伤口愈合的结果,并减少对传统封闭方法的依赖.
相关概念视频
01:18Detergent Purification of Membrane Proteins
Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
01:21Polymer Classification: Crystallinity
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
01:31Physical Properties of Carboxylic Acids
Carboxylic acids with lower molecular weight exhibit a sharp and unpleasant odor. They also have higher boiling and melting points than analogous compounds, such as aldehydes, ketones, and alcohols.
01:28Classification and Mechanical Properties of Synthetic Polymers
Synthetic polymers are classified as elastomers, fibers, or plastics based on their crystallinity. Crystallinity, the degree of long-range order in the solid state, influences the mechanical properties (stretching or contracting) of elastomers. Elastomers are flexible polymers that can expand or contract easily upon the application of an external force. They have numerous crosslinks that pull them back into their original shape when stress is removed. Silicones, for instance, are highly elastic...
01:31Plasticizers
Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
01:30Superplasticizers
Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...