Association between plasma metal elements and platelet dysfunction in trauma-induced coagulopathy rat model

Area of Science:

• Biochemistry
• Hematology
• Toxicology

Background:

• Trauma-induced coagulopathy (TIC) is frequently associated with disruptions in metal element homeostasis and impaired platelet function.
• Understanding the interplay between metal ions and platelet activity is crucial for managing trauma patients.

Purpose of the Study:

• To investigate the association between plasma metal element concentrations and platelet dysfunction in the context of trauma-induced coagulopathy.
• To determine if specific metal elements play a role in the development or severity of platelet dysfunction following different types of trauma.

Main Methods:

• A study involving 30 Sprague-Dawley rats divided into control, hemorrhage shock (HS), and multiple injury (MI) groups.
• Blood samples were collected at 0.5 and 3 hours post-trauma for analysis using inductively coupled plasma mass spectrometry, conventional coagulation tests, and thromboelastography.

Main Results:

• Plasma concentrations of zinc (Zn), vanadium (V), and cadmium (Ca) decreased in HS and MI groups, with a more sustained decline in MI.
• Correlations were observed between plasma metal levels (Ca, V, Ni, Zn, Se) and coagulation parameters (R, maximum amplitude) and platelet counts, varying by trauma type and time point.
• Specifically, plasma Ca and V levels were significantly associated with markers of platelet activation and function in both HS and MI models.

Conclusions:

• Plasma levels of Zn, V, and Ca are implicated in platelet dysfunction observed in trauma-induced coagulopathy.
• The observed changes in metal element concentrations and their impact on platelet function are sensitive to the type of trauma (HS vs. MI) and the time elapsed since injury.