相关实验视频
Updated: Jan 29, 2026

09:32
Electrospun Nanofiber Scaffolds with Gradations in Fiber Organization
Published on: April 19, 2015
10.3K
聚酸/聚烯酸纳米纤维支架 增强主要皮质神经元生长
Valeriia S Shtol1,2, Anastasiia D Tsareva1, Kirill A Arsentiev1
1Scientific Center for Genetics and Life Sciences, Sirius University of Science and Technology, 1, Olympic Ave., 354340 Sochi, Russia.
Polymers
|January 28, 2026
概括
生物降解的支架由多样乳酸/多样ε-caprolactone (PLA/PCL) 制成,具有多孔表面,促进神经元的存活,减少脊髓损伤 (SCI) 后的质反应. 这为中枢神经系统 (CNS) 组织工程提供了一个有希望的策略.
科学领域:
- 生物材料科学 生物材料科学
- 神经科学是一个神经科学.
- 组织工程是组织工程.
背景情况:
- 脊髓损伤 (SCI) 存在重大挑战,原因是中枢神经系统 (CNS) 的再生能力有限.
- 有效的组织工程支架需要机械兼容性,受控的降解,以及支持神经元生存和集成的微型架构特征.
- 电纳米纤维支架通过模仿细胞外基质并为神经再生提供线索,提供了一个有希望的方法.
研究的目的:
- 用一种特殊的溶剂系统来增强神经组织修复,制造和表征可生物降解的多乳酸/多乳酸 (PLA/PCL) 支架.
- 研究由溶剂选择控制的脚手架微型架构对神经元存活率和质细胞形态 in vitro的影响.
- 评估这些支架作为中央神经系统 (CNS) 组织工程平台的潜力.
主要方法:
- 使用二甲/四甲 (DCM/THF) 溶剂系统制造PLA/PCL纳米纤维支架,以诱导表面多孔性.
- 在模拟的伤害后氧化条件下,对脚手架的机械性能 (Young的模量) 和降解行为进行表征.
- 在DCM/THF制造的支架上播种的初级神经元-质细胞培养中的神经元密度,活力和质细胞形态的体外评估与六化醇 (HFIP) 相比.
主要成果:
- 该DCM/THF溶剂系统产生了带有多孔表面的PLA/PCL纳米纤维,增加了细胞相互作用面积和约26MPa的模量.
- 脚手架表现出持续的退化,特别是在与SCI微环境相关的氧化条件下.
- 在体外研究表明,在DCM/THF支架上,神经元密度增加了五倍,并保持了神经元活力 (在10天内约80%).
- DCM/THF支架支持了具有保存过程复杂性和减少圆性的星体,表明与HFIP制造的支架相比,反应性较低的形态.
结论:
- 对脚手架微架构的溶剂驱动控制是增强神经元集成和调节质反应的关键因素.
- 使用DCM/THF溶剂系统制造的PLA/PCL支架表现出卓越的生物活性,并促进神经再生的有利细胞环境.
- 这些DCM/THF加工的PLA/PCL支架代表了用于治疗脊髓损伤的中枢神经系统组织工程应用的有希望的生物材料平台.
相关概念视频
Primary and Secondary Growth in Roots and Shoots
60.4K
Vascular plants, which account for over 90% of the Earth’s vegetation, all undergo primary growth—which lengthens roots and shoots. Many land plants, notably woody plants, also undergo secondary growth—which thickens roots and shoots.
60.4K
Meristems and Plant Growth
49.4K
Plants grow throughout their lives; this is called indeterminate growth, and it distinguishes plants from most animals. Although certain parts of plants stop growing (e.g., leaves and flowers), others grow continuously—like roots and stems.
49.4K
Self-Evaluation: Self-Enhancement and Self-Verification
5.8K
Social psychologists have documented that feeling good about ourselves and maintaining positive self-esteem is a powerful motivator of human behavior (Tavris & Aronson, 2008). In the United States, members of the predominant culture typically think very highly of themselves and view themselves as good people who are above average on many desirable traits (Ehrlinger, Gilovich, & Ross, 2005). Often, our behavior, attitudes, and beliefs are affected when we experience a threat to our...
5.8K
Population Growth
28.4K
Population size is dynamic, increasing with birth rates and immigration, and decreasing with death rates and emigration. In ideal conditions with unlimited resources, populations can increase exponentially, which plots as a J-shaped growth rate curve of population size against time. This type of curve is characteristic of newly-introduced invasive species, or populations that have suffered catastrophic declines and are rebounding.
28.4K
Bioavailability Enhancement: Drug Solubility Enhancement
255
Body:Bioavailability is a critical factor in determining a drug's effectiveness. It refers to the proportion of a drug that enters the circulation when introduced into the body and is, as a result, able to have an active effect. Enhancing bioavailability is essential for drugs with poor solubility, as it can significantly impact their therapeutic efficacy. Various methods are employed to increase the solubility of drugs, thereby enhancing their bioavailability.Micronization and nanonization are...
255
Bioavailability Enhancement: Drug Permeability Enhancement
197
Body:After oral administration, poor permeability often limits the rate at which drugs are absorbed through the intestinal epithelium. Enhancing drug permeability is crucial for effective therapy, and several strategies have been developed to overcome this challenge.One effective strategy involves the use of lipid-based formulations. These formulations enhance dissolution and solubility, targeting physiological mechanisms to increase drug absorption. This includes stimulating bile salt...
197

