A Mouse 5/6th Nephrectomy Model That Induces Experimental Uremic Cardiomyopathy

Area of Science:

• Nephrology
• Cardiology
• Experimental Pathology

Background:

• Chronic kidney disease (CKD) significantly increases cardiovascular disease (CVD) risk and mortality.
• CKD progression can lead to uremic cardiomyopathy, a specific cardiac phenotype.
• Existing animal models for studying CKD-induced cardiac dysfunction have limitations.

Purpose of the Study:

• To develop and characterize a novel, efficient surgical mouse model for studying chronic kidney disease (CKD).
• To investigate the development of uremic cardiomyopathy in this new CKD model.
• To assess renal function, anemia, and cardiac parameters in the established model.

Main Methods:

• A two-step surgical procedure was employed: 5/6th partial nephrectomy (PNx) involving ligation of both poles of the left kidney, followed by removal of the right kidney 7 days later.
• Sham surgery was performed as a control, mimicking the surgical steps without kidney manipulation.
• Mice were analyzed four weeks post-surgery to evaluate physiological and pathological changes.

Main Results:

• The PNx model exhibited significantly impaired renal function and anemia compared to sham-operated controls.
• Cardiac hypertrophy and fibrosis were observed in the hearts of PNx mice.
• Significant decreases in both systolic and diastolic cardiac function were detected in the PNx group.

Conclusions:

• The described 5/6th PNx mouse model provides a viable and relatively straightforward method for inducing CKD and uremic cardiomyopathy.
• This model recapitulates key features of human uremic cardiomyopathy, including cardiac structural and functional abnormalities.
• The model is suitable for further research into the mechanisms and potential treatments for CKD-associated cardiovascular complications.