Dog Immune Complex Nephritis and Kidney Disease

Immune complex nephritis occurs when antibody-antigen complexes deposit in the kidneys, causing progressive inflammation and renal failure in dogs.

Key Facts

Immune complexes deposit in glomeruli causing inflammation and protein loss through urine
Underlying causes include chronic infections, cancer, and autoimmune diseases
Protein-losing nephropathy leads to hypoalbuminemia, edema, and thromboembolic risk
Diagnosis requires urinalysis showing proteinuria plus renal biopsy for definitive classification
Treatment focuses on managing the underlying cause and reducing proteinuria
ACE inhibitors and omega-3 fatty acids are commonly used to reduce protein loss
Prognosis depends on the underlying cause; some cases stabilize while others progress to kidney failure

Welfare Considerations

Progressive protein-losing nephropathy causes accumulating welfare harms: nausea and poor appetite from uremia, edema from low protein, and serious complications including blood clots. Early identification of the underlying cause and aggressive management of protein loss is essential to slow progression and maintain quality of life. Dogs with advanced disease may experience significant suffering from uremic signs.

What You Can Do

Monitor for proteinuria in dogs with chronic infections or autoimmune conditions as a screening step
Seek specialist evaluation at a veterinary internal medicine center for confirmed protein-losing nephropathy
Treat underlying infections promptly as resolution can improve or resolve immune complex nephritis
Follow dietary protein and phosphorus management guidelines for dogs with kidney disease
Monitor blood pressure as hypertension worsens kidney damage and is treatable
Discuss quality of life assessment tools with your vet as kidney disease progresses