IL-13 Alleviates Cardiomyocyte Apoptosis by Improving Fatty Acid Oxidation in Mitochondria

Area of Science:

• Cardiology
• Molecular Biology
• Biochemistry

Background:

• Sepsis-induced cardiac injury (SIC) is a critical complication in intensive care units (ICUs), associated with high mortality.
• Mitochondrial dysfunction is a primary driver of SIC pathogenesis.
• Interleukin-13 (IL-13) is recognized as a key regulator of mitochondrial biogenesis.

Purpose of the Study:

• To investigate the protective role of IL-13 in sepsis-induced cardiac injury (SIC).
• To elucidate the underlying molecular mechanisms by which IL-13 exerts its protective effects on cardiomyocytes.

Main Methods:

• Primary cardiomyocytes were stimulated with lipopolysaccharide (LPS) to induce a sepsis-like state.
• Assessed reactive oxygen species (ROS) production, apoptosis, and mitochondrial dysfunction.
• Utilized RNA-sequencing (RNA-seq), mitochondrial membrane potential assays, and measurements of fatty acid uptake and oxidation rates.

Main Results:

• LPS stimulation led to increased ROS production, apoptosis, and mitochondrial dysfunction in cardiomyocytes.
• Treatment with IL-13 significantly restored mitochondrial function and morphology.
• IL-13 improved mitochondrial fatty acid uptake and oxidation rates in septic cardiomyocytes.

Conclusions:

• IL-13 demonstrates a protective effect against sepsis-induced cardiac injury.
• IL-13 alleviates cardiac inflammation and apoptosis by enhancing mitochondrial fatty acid metabolism.
• IL-13 represents a promising therapeutic target for managing SIC.