Related Experiment Video
Updated: Mar 10, 2026
05:43
An In Vitro Assay to Study Platelet Migration Using RGD-Functionalized Avidin-Biotin Tethers
Published on: November 8, 2024
875
Role of albumin in regulating platelet function
Qiwen Tai1, Mengnan Yang1, Shuang Chen2
1Jiangsu Institute of Hematology, the First Affiliated Hospital of Soochow University, NHC Key Laboratory of Thrombosis and Hemostasis, National Clinical Research Center for Hematologic, Suzhou, China.
Frontiers in Pharmacology
|March 9, 2026
Summary
Albumin inhibits platelet activation and thrombus formation by modulating signaling pathways and utilizing its negative surface charge. This finding offers new insights into managing thrombosis risks associated with hypoproteinemia.
Area of Science:
- Biochemistry
- Hematology
- Molecular Biology
Background:
- Hypoproteinemia can lead to serious complications like thrombosis.
- Albumin is a therapeutic agent, but its role in thrombosis regulation is not fully understood.
- Existing clinical data on albumin's effect on thrombosis is conflicting.
Purpose of the Study:
- To investigate the mechanisms by which albumin affects platelet thrombus formation.
- To clarify the regulatory effects of albumin on thrombosis.
Main Methods:
- Platelet function experiments, including aggregation and activation assays.
- Western blot analysis to examine signaling pathways (PKC, Akt).
- Protein charge neutralization studies and animal models (murine hypoproteinemia model).
Main Results:
- Albumin significantly inhibited platelet thrombus formation and aggregation in vivo and in vitro.
- Albumin suppressed platelet granule release, altered granule distribution, and inhibited platelet spreading.
- The negative surface charge of albumin was identified as critical for its inhibitory effects on platelet activation.
Conclusions:
- Albumin inhibits platelet activation and thrombus formation.
- This inhibition is mediated by albumin's negatively charged surface residues.
- Modulation of Protein Kinase C (PKC) and Akt signaling pathways is involved in albumin's mechanism.
Related Concept Videos
01:18Structure and Function of Platelets
4.3K
The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000...
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000...
4.3K
01:22Formation of the Platelet Plug
10.2K
The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
10.2K
01:29Drug Distribution: Plasma Protein Binding
10.8K
Drugs predominantly attach to plasma proteins, with only a small percentage remaining unbound. The unbound portion can be calculated as one minus the bound fraction. Acidic drugs form large, inactive complexes by reversibly binding to plasma albumin, which prevents them from diffusing across biological barriers. These drug-protein complexes act as reservoirs for the drugs. As the concentration of unbound drugs decreases, these complexes quickly dissociate to release the free drug, maintaining...
10.8K
01:20Factors Affecting Protein-Drug Binding: Protein-Related Factors
630
Drug binding to proteins is a key aspect of pharmacokinetics and can influence a drug's distribution, absorption, and elimination in the body. Several factors, including the drug's physiochemical properties, protein concentration, disease states, and the number of binding sites on the protein, influence this process.
The physicochemical properties of a drug play a significant role in its ability to bind to proteins. Lipophilic drugs, which dissolve in fats, oils, and lipids, can be...
The physicochemical properties of a drug play a significant role in its ability to bind to proteins. Lipophilic drugs, which dissolve in fats, oils, and lipids, can be...
630
01:20Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors
1.4K
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...
1.4K
01:30Anticoagulant Drugs: Low-Molecular-Weight Heparins
2.2K
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...
2.2K