Chronic cyclosporine nephrotoxicity. A rodent model

Area of Science:

• Nephrology
• Toxicology
• Animal Models

Background:

• Chronic cyclosporine (CsA) nephrotoxicity is a significant clinical issue.
• Existing rodent models fail to fully replicate human-specific CsA-induced kidney damage, hindering research.
• Key human pathological features like interstitial fibrosis and tubular atrophy are poorly represented in current models.

Purpose of the Study:

• To establish and validate a reproducible rodent model for chronic CsA nephrotoxicity.
• To develop a model that accurately reflects human pathological changes in the kidney.
• To facilitate further investigation into the mechanisms and treatment of CsA-induced kidney injury.

Main Methods:

• Male Sprague-Dawley rats were administered CsA (25 mg/kg/d i.p.) in olive oil for 28 days.
• Control animals received olive oil only and were pair-fed.
• Histopathological analysis, body weight, and glomerular filtration rate (GFR) were assessed.

Main Results:

• The CsA-treated group developed interstitial fibrosis, tubular atrophy, interstitial inflammation, and juxtaglomerular apparatus (JGA) hypertrophy/hyperplasia.
• CsA-treated rats exhibited significantly reduced weight gain and depressed GFR compared to controls.
• The model was well-tolerated, without peritonitis, and JGA changes were minimal in controls.

Conclusions:

• This CsA administration protocol in rats successfully reproduces key features of chronic human CsA nephrotoxicity.
• The developed model offers a valuable tool for studying CsA-induced kidney disease.
• Further research utilizing this model can advance understanding and therapeutic strategies for CsA nephrotoxicity.