Related Experiment Video
Updated: Apr 7, 2026
06:32
Dynamic Multiparameter Platelet Function Assessment Using a Capacitive Biosensor
Published on: May 2, 2025
905
Platelet Drp1 phosphorylation provides a platform for immune-based platelet function testing
David A Barrios1,2, Shihui Guo1, Matthew Powers2
1Division of Hemostasis and Thrombosis, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA.
Blood
|April 6, 2026
Summary
Researchers discovered how Dynamin-related protein 1 (Drp1) is phosphorylated in platelets, leading to new immune-based assays for monitoring platelet function and antiplatelet drug effectiveness.
Area of Science:
- Biochemistry
- Cell Biology
- Hematology
Background:
- Dynamin-related protein 1 (Drp1) is crucial for mitochondrial fission in platelets.
- Regulation of Drp1 phosphorylation during platelet activation is not well understood.
Purpose of the Study:
- To investigate signaling pathways controlling Drp1 phosphorylation in activated platelets.
- To develop novel immune-based assays for platelet function monitoring.
Main Methods:
- Evaluation of Drp1 phosphorylation at Ser616 and Ser637 in response to various platelet agonists and inhibitors.
- Development and validation of ELISA and lateral flow assays using phospho-Drp1.
- Comparison of new assays with standard platelet function tests like light transmission aggregometry and VerifyNow™.
Main Results:
- Platelet activation via G protein-coupled receptors or ITAM/hemITAM receptors triggers Ser616-Drp1 phosphorylation via p38, amplified by ADP and TxA2.
- Pacifying agents like PGE1 and nitric oxide induce Ser637-Drp1 phosphorylation via cyclic nucleotide-dependent protein kinases.
- Developed phospho-Drp1 assays show robustness in whole blood, allow sample freezing, and offer improved dynamic range and sensitivity for antiplatelet drug monitoring (aspirin, clopidogrel).
Conclusions:
- A unique signaling circuitry controls Drp1 phosphorylation in platelets.
- Detailed understanding of platelet signaling enables the development of high-fidelity immune-based assays.
- Phospho-Drp1 assays provide a sensitive and robust method for monitoring platelet function and antiplatelet therapy efficacy.
Related Concept Videos
01:18Structure and Function of Platelets
5.4K
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...
5.4K
01:22Formation of the Platelet Plug
10.8K
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...
10.8K