膜脂在调节组织因子前凝功能中的作用
Shabbir A Ansari1, Mohini Mendiratta2, Atrayee Bhattacharya1
1Department of Cellular and Molecular Biology, The University of Texas at Tyler School of Medicine, The University of Texas at Tyler Health Science Center, Tyler, Texas, USA.
Current opinion in hematology
|March 2, 2026
概括
膜脂质重塑是组织因子 (TF) 活性的关键,将TF从无活性转移到活性状态. 了解这种依赖脂的解密对于新的抗血栓策略至关重要.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 血液静止 血液静止 血液静止
背景情况:
- 组织因子 (TF) 传统上被视为主要由蛋白质相互作用调节.
- 新出现的证据强调了膜脂环境在调节TF活性方面的关键作用.
研究的目的:
- 综合目前对TF调节的理解,强调膜脂质重塑.
- 根据最近的生物物理和功能研究,更新TF前凝剂功能的机制模型.
主要方法:
- 对TF-脂质相互作用的生物物理,机理学和功能研究的审查.
- 高分辨率成像和分子动力学模拟的分析.
- 整合有关脂重塑及其对TF活性影响的数据.
主要成果:
- TF存在于低活性,加密状态,需要膜重组才能激活.
- 脂重塑,包括酸胺的外部化和基米林的水解,驱动TF解密.
- 脂质调节改变了蛋白质-脂质相互作用,膜曲率和微域,优化了凝结因子对齐.
结论:
- 膜脂是TF功能在正常状态和疾病状态中的活性调节剂.
- 定义依赖脂的TF解密途径对于未来的凝血研究至关重要.
- 针对膜驱动的TF活动为新型抗血栓治疗提供了潜力.
相关概念视频
01:30Anticoagulant Drugs: Low-Molecular-Weight Heparins
2.1K
Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
2.1K
01:20Extrinsic and Intrinsic Pathways of Hemostasis
14.2K
Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...
14.2K
01:16Clot Retraction and Fibrinolysis
9.7K
After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
9.7K
01:09Coagulation
11.3K
The coagulation phase is a critical part of the body's process to prevent blood loss following injury to blood vessels. It involves chemical reactions that form a clot to seal the injured area. The clotting process begins shortly after injury, within 15-20 seconds for severe damage and 1-2 minutes for minor injuries.
During the coagulation phase, clotting factors, or procoagulants, play a vital role in initiating and progressing the coagulation cascade. This cascade is a series of reactions...
During the coagulation phase, clotting factors, or procoagulants, play a vital role in initiating and progressing the coagulation cascade. This cascade is a series of reactions...
11.3K
01:42Phosphoinositides and PIPs
10.4K
Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
10.4K
01:35Asymmetric Lipid Bilayer
10.5K
Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
10.5K