Related Experiment Video
Updated: Jul 4, 2026

Turbidimetry on Human Washed Platelets: The Effect of the Pannexin1-inhibitor Brilliant Blue FCF on Collagen-induced Aggregation
Published on: April 6, 2017
Rapid resensitization of purinergic receptor function in human platelets
S J Mundell1, J F Barton, M B Mayo-Martin
1Department of Physiology and Pharmacology, School of Medical Sciences, University Walk, Bristol, UK.
Platelet responses to adenosine diphosphate (ADP) receptors P2Y(1) and P2Y(12) rapidly resensitize. Receptor internalization and recycling are crucial for this resensitization process in human platelets.
Area of Science:
- Biochemistry
- Cell Biology
- Pharmacology
Background:
- Adenosine diphosphate (ADP) regulates platelet activation via P2Y(1) and P2Y(12) purinergic receptors.
- These receptors desensitize and internalize in human platelets through kinase-dependent pathways.
Purpose of the Study:
- To investigate if P2Y(1) and P2Y(12) receptor responses resensitize in human platelets.
- To determine the role of receptor trafficking in the resensitization process.
Main Methods:
- Studies conducted in human platelets and cells expressing P2Y(1) and P2Y(12) receptor constructs.
- Investigated receptor internalization, dephosphorylation, and recycling.
Main Results:
- Demonstrated rapid resensitization of P2Y(1) and P2Y(12) receptor responses after desensitization.
- Disruption of receptor internalization, dephosphorylation, or recycling blocked resensitization.
- Platelet receptor internalization, dependent on dynamin, is essential for resensitization.
Conclusions:
- P2Y(1) and P2Y(12) receptor activity is rapidly and reversibly modulated in human platelets.
- Receptor trafficking is an essential mechanism for purinergic receptor resensitization.
More Related Videos
04:37Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation
Published on: May 23, 2025
05:49Procoagulant Platelet Characterization by Measuring Phosphatidylserine Exposure and Microvesicle Release from Human Purified Platelets
Published on: November 29, 2024
Related Concept Videos
GPCR Desensitization
Formation of the Platelet Plug
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...
Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
Desensitization and Tachyphylaxis
Several...