针对肝细胞中的FXR:增强纤维解和降低深静脉血栓的有希望的方法
1The First Affiliated Hospital of Xi'an Jiaotong University, Xi'An, China.
Blood
|August 27, 2025
概括
肥胖增加了深静脉血栓形成 (DVT) 的风险,因为血原激活剂抑制剂1 (PAI-1) 在肝脏中增加. 在肝细胞中激活FXR可降低PAI-1,改善纤维解和降低DVT负担.
科学领域:
- 代谢疾病
- 血液学
- 分子生物学
背景情况:
- 肥胖是静脉血栓塞栓症 (VTE) 的重要危险因素.
- 血原激活剂抑制剂1 (PAI-1) 与肥胖有关,并影响纤维解,但其对肥胖的调节尚不清楚.
- 肝脏在调节循环PAI-1水平方面发挥着至关重要的作用.
研究的目的:
- 研究PAI-1在肥胖中的上游调节.
- 确定PAI-1在与肥胖相关的纤维解和深静脉血栓 (DVT) 中的作用.
- 探索向肝细胞FXR信号的潜力,以获得治疗效益.
主要方法:
- 使用饮食诱导的肥胖 (DIO) 鼠标模型来研究PAI-1表达和纤维解.
- 来自肥胖人肝的单细胞RNA-seq数据被分析为FXR信号.
- 在小鼠和初级小鼠肝细胞 (MPH) 中进行了FXR激活和抑制研究.
- 用于评估转录调节的方法是使用双露西法酶报告剂测定和染色体免疫沉 (Ch- IP).
- 对肥胖小鼠进行了药理治疗.
主要成果:
- DIO小鼠显示肝细胞PAI-1增加,纤维溶解时间缩短,静脉血栓增加.
- 肝细胞FXR信号减少与肥胖人的PAI-1增加相关.
- 在小鼠和MPH中,FXR激活抑制了Serpine1 mRNA和PAI-1蛋白.
- FXR激活直接抑制了Serpine1的转录.
- 在肥胖小鼠中,托皮菲克索治疗降低了血PAI-1,改善了纤维溶解,并降低了DVT负担.
结论:
- 肝细胞中的FXR信号是PAI-1表达的关键调节者.
- 针对肝脏FXR激活可能是改善纤维解和降低肥胖个体DVT风险的新疗法.
相关概念视频
Venous Thrombosis III: Interprofessional Care
22
Venous thrombosis requires effective prevention and treatment strategies to improve patient outcomes and reduce potential complications.Prevention StrategiesHealthcare providers must prioritize preventing venous thromboembolism (VTE) for all adult patients upon admission. Interventions depend on bleeding and thrombosis risk, medical history, current medications, diagnoses, planned procedures, and patient preferences. Patients on bed rest should change positions every two hours and, if not...
22
Anticoagulant Drugs: Low-Molecular-Weight Heparins
889
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...
889
Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants
1.3K
Oral anticoagulants are vital tools in preventing and treating blood clotting disorders. This diverse class of medications can be categorized as vitamin K antagonists, exemplified by warfarin, and direct thrombin inhibitors (DTIs), such as dabigatran, as well as factor Xa inhibitors, including rivaroxaban.
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
1.3K
Clot Retraction and Fibrinolysis
6.8K
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.
6.8K
Extrinsic and Intrinsic Pathways of Hemostasis
9.2K
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...
9.2K
Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors
644
Antiplatelet drugs emerge as frontline defenders against the insidious threat of thromboembolic diseases, where abnormal clots obstruct vital blood vessels. These drugs stand as bulwarks, inhibiting platelet aggregation and clot formation, thereby mitigating the risk of life-threatening conditions like myocardial infarction, coronary artery disease, and thrombotic strokes.
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
644


