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Chronic ciclosporin nephrotoxicity: a rabbit model.
J A Thliveris1, R W Yatscoff, M P Lukowski
1Health Sciences Clinical Research Centre, University of Manitoba, Winnipeg, Canada.
Nephron
|January 1, 1991
Summary
Cyclosporine (CsA) causes significant kidney damage in rabbits, including reduced creatinine clearance and cellular changes. These findings indicate chronic CsA nephrotoxicity, mirroring effects observed in human patients.
Area of Science:
- Nephrology
- Pharmacology
- Toxicology
Background:
- Cyclosporine (CsA) is an immunosuppressant drug with known nephrotoxic potential.
- Understanding the specific mechanisms and morphological changes associated with CsA-induced kidney damage is crucial for patient management.
Purpose of the Study:
- To investigate the chronic nephrotoxicity of Cyclosporine (CsA) in a rabbit model.
- To characterize the morphological and functional kidney changes induced by varying doses of CsA.
Main Methods:
- Intravenous administration of CsA (2.5, 5.0, 10 mg/kg/day) or controls (saline, cremophor-EL) to New Zealand white rabbits for 30 days.
- Assessment of creatinine clearance, body weight, blood pressure, and detailed morphological examination (light and ultrastructural microscopy) of kidney tissues.
Main Results:
- Significant reduction in creatinine clearance observed in the highest CsA dose group (10 mg/kg/day).
- Morphological changes included leukocyte infiltration, tubular atrophy, interstitial fibrosis, and arteriolopathy in CsA-treated groups.
- Ultrastructural analysis revealed vacuoles, lysosomal-like structures, and loss of cellular integrity in tubules, alongside interstitial collagen fiber deposition.
Conclusions:
- Chronic administration of CsA induces significant nephrotoxicity in rabbits.
- The observed kidney damage, including tubular and interstitial changes, closely resembles human CsA nephrotoxicity.
- These findings underscore the importance of monitoring kidney function in patients receiving CsA therapy.