介导丝表达的损伤揭示了对细胞功能的影响,独立于状细胞转化
Charlotte Klein1,2, Imke Ramminger1,3, Shuoqiu Bai1
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
|December 17, 2024
概括
在口腔细胞中破坏细胞质中介纤维 (cIF),如质素和质素,会影响细胞的增殖和分化,这对组织健康至关重要. 这项研究揭示了cIFs.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 组织恒温 组织恒温.
背景情况:
- 细胞质中介纤维 (cIF) 对于细胞功能至关重要,但它们的具体作用和破坏后果尚不清楚.
- 了解cIF如何影响组织稳态和细胞功能是细胞生物学的一个关键挑战.
研究的目的:
- 调查口腔表皮中cIF干扰的分子和细胞功能后果.
- 探索特定的cIFs (克拉,维丁) 与细胞功能 (如增殖和分化) 之间的相互关系.
- 为了确定cIFs和上皮分化标志物之间的潜在相互作用.
主要方法:
- 利用基于RNAi的机械方法来损害细胞固有的cIFs.
- 检查了不同细胞转化阶段的酒精处理的口腔牙角质细胞.
- 评估了对增殖,分化,染色质状态,层状B1和内素 (IVL) 表达的影响.
主要成果:
- 质素 (KRT5,KRT14) 和维素 (VIM) 的损伤影响了口腔质细胞的增殖和分化.
- cIF干扰调节色素状态和降低了B1层和内素 (IVL) 表达.
- 影响IVL降低了cIF表达,这表明cIF和IVL之间存在监管相互作用.
结论:
- cIF损害导致扩散和分化的不平衡,这对于维持组织平衡至关重要.
- 有针对性的cIF破坏是研究它们在细胞依赖组织生理学中的作用的有希望的策略.
- 确定了cIF和上皮分化过程之间的潜在相互作用.
相关概念视频
Disassembly of Intermediate Filaments
2.0K
Intermediate filaments (IFs) do not undergo spontaneous disassembly. Enzymes, kinases, and phosphatases add and remove phosphates from specific sites to regulate their disassembly. The IF concentration in the cytoplasm also regulates the disassembly. If the concentration crosses a threshold, it activates the protein kinases in the vicinity, allowing the phosphorylation of IFs.
Keratin proteins, found at the cell periphery near cell junctions, undergo a cycle of assembly and disassembly. In Type...
Keratin proteins, found at the cell periphery near cell junctions, undergo a cycle of assembly and disassembly. In Type...
2.0K
Types of Intermediate Filaments
3.6K
The intermediate filaments are an essential component of the cytoskeleton. Presently six types of intermediate filament have been identified. Type I and II are acidic and basic keratin proteins. Type III is of mesodermal origin and comprises four proteins: vimentin, desmin, glial fibrillary acidic protein (GFAP), and peripherin. Vimentin is commonly found in mesenchymal cells, desmin in muscle cells, GFAP in astrocytes, while peripherin is found in peripheral nervous system neurons (PNS). Type...
3.6K
Destabilization of Microtubules
2.6K
The destabilization of microtubules can occur during different stages of the microtubule lifecycle, such as nucleation or elongation. It can take place at either end of the microtubule or in the microtubule lattices as a whole. The lifespan of individual microtubules within a cell varies according to the cell type and stage of the cell cycle. During interphase, the lifespan of the microtubule is about 30 minutes, while during cell division, it is about 15 minutes. In axonal microtubules of...
2.6K
The Structure of Intermediate Filaments
3.9K
The intermediate filaments are one of three widely studied cytoskeletal filaments. They are so named as their diameter (10 nm) is in between that of microfilaments (7 nm) and the microtubules (25 nm). These filaments are highly stable and can remain intact when exposed to high salt concentrations and detergents. These filaments are responsible for providing stability and mechanical support to the cells. They also help in cell adhesion and maintaining tissue integrity.
Intermediate...
Intermediate...
3.9K
Intracellular Signaling Affects Focal Adhesions
2.6K
Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
Some...
2.6K
Formation of Intermediate Filaments
2.9K
Intermediate filaments are cytoskeletal proteins with higher tensile strength and flexibility than microfilaments and microtubules. Unlike the other two cytoskeletal proteins, intermediate filament formation lacks the enzymatic activity to hydrolyze nucleotides like ATP and GTP to generate energy for polymerization. Therefore, the formation of intermediate filaments is multistep self-assembly. The involvement of any accessory proteins in intermediate filament formation has not yet been...
2.9K


