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Updated: Jul 6, 2025

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cGMP modulates hemin-mediated platelet death.

Anne-Katrin Rohlfing1, Marcel Kremser1, David Schaale1

  • 1Department of Cardiology and Angiology, University Hospital Tübingen, University Tübingen, Otfried-Müller-Straße 10, 72076 Tübingen, Germany.

Thrombosis Research
|January 3, 2024
PubMed
Summary

Hemolysis causes dangerous blood clots by activating platelets. Modulating cyclic guanosine monophosphate (cGMP) levels offers a potential new strategy to control this platelet activation and prevent thrombosis in hemolytic crises.

Keywords:
FerroptosisHeminLipidomePlateletcGMP

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Area of Science:

  • Hematology
  • Thrombosis Research
  • Molecular Medicine

Background:

  • Hemolysis is a significant risk factor for thrombosis, leading to critical limb ischemia, microcirculatory disturbances, and organ failure.
  • Intravascular hemolysis can trigger uncontrolled thrombo-inflammation, resulting in life-threatening complications.
  • Current antithrombotic therapies are insufficient for managing hemolysis-associated thrombotic events, necessitating investigation into underlying pathways.

Purpose of the Study:

  • To investigate the effects of hemin on platelet physiology and morphology.
  • To identify novel therapeutic targets for treating thrombosis in hemolytic conditions.

Main Methods:

  • Utilized classical experimental setups, flow cytometry, metabolomics, and lipidomics.
  • Analyzed the impact of hemin on platelet activation, death, and lipidome alterations.
  • Investigated the role of the soluble guanylate cyclase (sGC)-cyclic guanosine monophosphate (cGMP)-cGKI signaling pathway.

Main Results:

  • Hemin strongly induces platelet activation, modulated by the sGC-cGMP-cGKI axis.
  • Hemin-induced platelet death results in distinct subpopulations and is associated with increased reactive oxygen species (ROS).
  • Hemin alters the platelet lipidome, increasing arachidonic acid derivatives, and cGMP modulation diminishes hemin's ferroptotic effect.

Conclusions:

  • cGMP plays a crucial role in modulating hemin-induced platelet activation, thrombus formation, and platelet death.
  • Modulating platelet cGMP levels presents a potential novel therapeutic strategy for controlling thrombosis and critical limb ischemia in hemolytic crises.