Pyruvate Dehydrogenase Complex Stimulation With Dichloroacetate May Improve Septic Cardiac Dysfunction

Area of Science:

• Cardiology
• Metabolism
• Sepsis Research

Background:

• Sepsis-induced cardiomyopathy increases mortality.
• Molecular mechanisms of septic cardiomyopathy remain unclear.
• Dichloroacetate (DCA) targets pyruvate dehydrogenase kinase (PDK) to activate pyruvate dehydrogenase (PDH).

Purpose of the Study:

• To investigate the role of DCA in septic cardiac dysfunction.
• To explore DCA's effects on cardiac performance and metabolism in a murine sepsis model.

Main Methods:

• Cecal ligation and puncture (CLP) induced sepsis in mice.
• DCA administered to assess PDH activation's impact on cardiac function and metabolism.
• Matrix-assisted laser desorption/ionization imaging mass spectrometry analyzed metabolic alterations.

Main Results:

• CLP increased PDH inactivation (phosphorylation); DCA reversed this.
• DCA improved cardiac preload and stroke volume at 12 hours post-CLP.
• DCA enhanced cardiac contractility at 30 hours post-CLP and altered metabolic intermediates, including itaconate.

Conclusions:

• Sepsis reduces cardiac PDH activity.
• DCA administration improved cardiac performance in a murine sepsis model.
• Further research is needed to confirm DCA's therapeutic potential for septic cardiomyopathy.