评估人体尾管网细胞和组织中交叉链接的动蛋白网络 (CLANs)
Pinkal D Patel1, Abbot F Clark2
1Department of Pharmacology & Neuroscience, North Texas Eye Research Institute, University of North Texas Health Science Center, Fort Worth, TX, USA.
Methods in molecular biology (Clifton, N.J.)
|October 21, 2024
概括
交叉链接的动因网络 (CLAN) 与眼睛压力增加和青光眼有关. 本研究详细介绍了识别CLAN的方法,这些方法对于了解青光眼的发展和潜在的治疗方法至关重要.
科学领域:
- 眼科医生 眼科 眼科
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 眼内压升高 (IOP) 是青光眼的主要风险因素,导致不可逆转的视力丧失.
- 玻璃眼包括增加对水性幽默外流的抵抗力,导致持续的内压升高.
- 脊髓网 (TM) 功能障碍,包括像交叉连接的网 (CLANs) 这样的动因细胞骨变化,有助于TM组织硬化和IOP增加.
研究的目的:
- 描述在青光眼研究中识别和表征交联性actin网络 (CLAN) 的方法.
- 调查CLANs与青光眼病理学的关联,特别是TM硬化.
- 探索葡萄糖皮质体 (GC) 和TGFβ2信号在TM内的CLAN形成中的作用.
主要方法:
- 使用光显微镜识别和描述CLAN.
- 使用初级TM细胞培养物进行细胞分析.
- 使用ex vivo输液培养人类前部细分和在现场的人体捐赠者眼睛进行组织水平的研究.
主要成果:
- CLANs被识别为TM和板状晶状体 (LC) 细胞内的多边形动因阵列,与玻璃眼中TM组织度相关.
- 在初级开角青光眼 (POAG) TM 细胞和组织中观察到CLANs的增加.
- 葡萄皮质皮质体 (GC) 和TGFβ2信号通路诱导TM细胞中的CLAN,将它们与眼睛高血压 (OHT) 和青光眼的发展联系起来.
结论:
- 克兰是一个显著的超结构性变化在青光眼,与TM硬化和升高的内血压.
- GC和TGFβ2信号通路在CLAN形成中发挥作用,使它们与青光眼病原发生有关.
- 需要进一步的研究,以充分阐明CLAN形成的机制及其与眼病理学的直接相关性.
更多相关视频
相关概念视频
Cell-matrix's Response to Mechanical Forces
2.6K
In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue.
Anchoring junctions mechanically attach a cell to the...
Anchoring junctions mechanically attach a cell to the...
2.6K
Actin Treadmilling
8.0K
Actin filaments undergo polymerization and depolymerization from either end. The polymerization and depolymerization rates depend on the cytosolic concentration of free G-actins. The polymerization rate is generally higher at the plus or barbed end, while the depolymerization rate is higher at the minus or pointed end. At a steady state, critical concentration describes the concentration of free G-actin monomers at which the polymerization rate at the plus end is equal to that of the...
8.0K
Structural Protein Function
27.5K
Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...
27.5K
Tension Response at Adherens Junctions
2.6K
The adherens junctions that anchor cells together are multi-protein complexes that dynamically adapt to mechanical stimuli such as tensile forces and shear stress. Mechanosensory proteins in these junctions can sense such mechanical stimuli and undergo a shift in their conformation, resulting in an altered function — a process called mechanotransduction.
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin...
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin...
2.6K
The Role of Actin and Myosin in Non-muscle Cells
3.4K
Actin and myosin or actomyosin filaments also play a significant role in cells other than those involved in muscle contraction (which occurs within the sarcomere of muscle cells). The mechanism of non-muscle cell contractile bundles was first observed in Dictyostelium and Acanthamoeba. In non-muscle cells, two bundles are commonly found: stress fibers and actomyosin adherence belts. These contractile bundles are smaller and less organized than the ones found in muscle cells. They are held...
3.4K
Actin Polymerization and Cell Motility
5.1K
Actin is a family of globular proteins that are highly abundant in eukaryotic cells. It makes up approximately 1-5% of total cell protein concentration. Actin monomers polymerize to form a complex network of polarized filaments, the actin cytoskeleton, that plays a crucial role in many cellular processes, including cell motility, division, endocytosis, and metastasis of cancer cells.
Actin cytoskeleton dynamics can produce pushing, pulling, and resistance forces that help the cell to migrate....
Actin cytoskeleton dynamics can produce pushing, pulling, and resistance forces that help the cell to migrate....
5.1K


