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  1. Home
  3. Platelet Drp1 Phosphorylation Provides A Platform For Immune-based Platelet Function Testing.
  1. Home
  3. Platelet Drp1 Phosphorylation Provides A Platform For Immune-based Platelet Function Testing.

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Platelet Drp1 phosphorylation provides a platform for immune-based platelet function testing.

David A Barrios1, Shihui Guo2, Matthew Powers1

  • 1PlateletDiagnostics, LLC, Watertown, Massachusetts, United States.

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|April 6, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

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.

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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.