Acute Kidney Injury Induces Remote Cardiac Damage and Dysfunction Through the Galectin-3 Pathway

Area of Science:

• Cardiovascular Medicine
• Nephrology
• Immunology

Background:

• Acute kidney injury (AKI) is a recognized risk factor for heart failure and mortality.
• The mechanisms linking AKI to cardiac complications are not fully understood.
• Identifying molecular pathways involved in AKI-induced cardiac dysfunction is crucial for therapeutic development.

Purpose of the Study:

• To investigate the role of galectin-3 (Gal-3) in mediating cardiac dysfunction following acute kidney injury.
• To determine the cellular origin of Gal-3 involved in this process.
• To explore the potential of blocking the Gal-3 pathway as a therapeutic strategy for preventing cardiac damage in AKI.

Main Methods:

• Induction of acute kidney injury in a relevant animal model.
• Assessment of cardiac function, histology, and fibrosis.
• Quantification of galectin-3 expression and its cellular source.
• Pharmacological inhibition of the galectin-3 pathway.

Main Results:

• Acute kidney injury led to significant remote cardiac dysfunction, including impaired contractility and relaxation.
• Histological analysis revealed cardiac damage and fibrosis in animals with AKI.
• Galectin-3 levels were elevated in the injured kidneys and hearts, with Gal-3 originating from bone marrow-derived immune cells.
• Blocking the galectin-3 pathway significantly ameliorated cardiac dysfunction and fibrosis.

Conclusions:

• Acute kidney injury induces cardiac dysfunction, damage, and fibrosis through a galectin-3 dependent pathway.
• Galectin-3, originating from immune cells, plays a critical role in mediating these remote effects.
• Inhibition of the galectin-3 pathway represents a promising therapeutic approach to prevent cardiac complications associated with AKI.