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Related Experiment Video

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Microfluidics in Assessing Platelet Function
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Mitochondrial dysfunction in platelets from severe trauma patients - A prospective case-control study.

Lilla Sándor1, Tibor Donka2, Bálint Baráth1

  • 1Department of Traumatology, University of Szeged, Semmelweis str 6., Szeged, 6725, Hungary.

Injury
|September 20, 2024
PubMed
Summary

Severe trauma impairs platelet mitochondria, reducing ATP synthesis and clot stability. This platelet mitochondrial dysfunction contributes to trauma-induced coagulopathy (TIC).

Keywords:
Clinical trialHigh-resolution respirometryMitochondrial dysfunctionPlatelet activationTrauma-induced coagulopathy (TIC)

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Area of Science:

  • Mitochondrial physiology
  • Trauma pathophysiology
  • Coagulation science

Background:

  • Trauma-induced coagulopathy (TIC) is a complex imbalance in blood clotting following severe injury.
  • Platelet function, crucial for clot formation, is linked to mitochondrial activity.
  • Previous studies have not comprehensively investigated mitochondrial dysfunction in platelets of severe trauma patients.

Purpose of the Study:

  • To investigate platelet mitochondrial function in patients with severe trauma.
  • To determine the association between mitochondrial dysfunction and trauma-induced coagulopathy.

Main Methods:

  • Prospective case-control study involving severe trauma patients (ISS≥16) and healthy controls.
  • Analysis of platelet mitochondrial function including oxygen consumption, H2O2 production, and Ca2+ movements using Oxygraph-2k.
  • Coagulation assessment via standard laboratory tests, viscoelastometry (ClotPro), and aggregometry (Multiplate).

Main Results:

  • Severe trauma patients exhibited significantly decreased platelet mitochondrial oxidative phosphorylation (OxPhos) compared to controls.
  • Increased mitochondrial H2O2 production and enhanced extramitochondrial Ca2+ release were observed in trauma patients.
  • Reduced clot firmness (MCF) and prolonged clotting time (CT) correlated with decreased OxPhos and increased Injury Severity Score (ISS).

Conclusions:

  • Severe trauma is associated with significant platelet mitochondrial dysfunction.
  • This dysfunction leads to reduced ATP synthesis and impaired Ca2+ handling, critical for platelet activation and clot stability.
  • Platelet mitochondrial dysfunction is a key contributor to the development of trauma-induced coagulopathy.