形式与功能相结合:纤维结构指导牙角质细胞的增殖和分化
Imke Ramminger1,2, Thorsten Steinberg1, Bernd Rolauffs3
1Division of Oral Biotechnology, Center for Dental Medicine, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetterstr. 55, 79106 Freiburg, Germany.
Cells
|February 12, 2026
概括
脚手架纤维的方向和直径控制口腔角质细胞的增殖和分化. 对齐的纤维促进了持续的生长,而随机的纤维增强了分化,这对组织工程有影响.
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.
- 细胞生物学 细胞生物学
背景情况:
- 口腔上皮质再生需要精确控制角质细胞的增殖和分化.
- 来自生物材料支架的机械生物学线索显著影响细胞命运.
- 脚手架架构的特定作用,如纤维方向和直径,在指导牙角质细胞行为方面尚未完全理解.
研究的目的:
- 系统地研究不同纤维方向 (对齐与随机) 和直径的电聚烯酸 (PCL) 支架如何影响人类牙角质细胞的行为.
- 评估这些支架特性对细胞形态,增殖,分化和基底质素 (KRT5/KRT14) 的作用的影响.
主要方法:
- 制造具有控制纤维方向和直径 (600-800 nm,1.2-1.7 μm,2.0-2.5 μm) 的PCL支架.
- 在这些支架上培养了不朽的人类牙角质细胞.
- 对细胞和核形态,增殖 (EdU测定),基因表达 (ddPCR) 的基因表达和分化标记物,蛋白质表达 (IVL,FLG) 和KRT5/KRT14敲击的效果进行定量分析.
主要成果:
- 排列,直径为1.2-1.7微米的纤维诱导了延长的细胞/核形态和持续的增殖.
- 随机的,直径小的 (600-800纳米) 纤维促进了圆形的细胞/核形状,短暂的增殖突发,以及基底质素 (KRT5/KRT14) 和分化标记物 (KRT1,KRT10,IVL,FLG) 的增强表达.
- KRT5/KRT14对于在随机的支架上,但不对齐的支架上质细胞活力至关重要,根据支架类型对下游标记物和机械传导通路 (LMNB1,YAP1) 产生差异性影响.
结论:
- 纤维的方向和直径是控制PCL支架上的角质细胞增殖和分化的关键设计参数.
- 带有较小纤维的随机支架促进了分化,而对齐的支架支持了持续的增殖,这表明了不同的机械生物信号.
- 结合对齐和随机纤维的分层支架为口腔表皮的空间控制再生提供了一个有希望的策略.
相关概念视频
Differential Form of Maxwell's Equations
1.3K
James Clerk Maxwell (1831–1879) was one of the significant contributors to physics in the nineteenth century. He is probably best known for having combined existing knowledge of the laws of electricity and the laws of magnetism with his insights to form a complete overarching electromagnetic theory, represented by Maxwell's equations. The four basic laws of electricity and magnetism were discovered experimentally through the work of physicists such as Oersted, Coulomb, Gauss, and...
1.3K
Local Anesthetics: Differential Sensitivity of Nerve Fibers
1.5K
Local anesthetics (LAs) block the sodium channels of nerve trunks, sensory nerve endings, and neuromuscular junctions. Although LAs can block all kinds of nerves, the sensitivity of nerve fibers differs according to nerve types and structures. LAs are known to block myelinated fibers faster than unmyelinated ones. Also, they block pain or sensory neurons at low concentrations without affecting the motor neurons involved in muscle contractions. This helps relieve labor pain without affecting the...
1.5K
Classification of Skeletal Muscle Fibers
59.6K
Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized into three types based on differences in their contraction speed and how they produce ATP, as well as physical differences related to these factors. Most human muscles contain all three muscle fiber types, albeit in varying proportions.
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
59.6K
Abnormal Proliferation
5.3K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
5.3K
Polymer Classification: Architecture
3.9K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
3.9K
Cells Coordinate Growth and Proliferation
5.1K
Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
5.1K


