Light and electron microscopic changes in the kidney of Wistar rats following treatment with cyclosporine A
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Abstract:
The morphological changes found in kidneys of patients undergoing chronic Cyclosporine A (CSA) treatment could, despite of numerous attempts, not yet be reproduced in reliable experimental models. The purpose of the present investigation was to systematically scan the in vivo fixed kidneys in CSA treated Wistar rats at the light and electron microscopic level. The study revealed changes in the proximal tubules, i.e., inclusion bodies, vacuolization, microcalcifications and regeneration. Some glomeruli displayed a thickening of the parietal sheet of Bowman's capsule. At the electron microscopic level, individual necroses of myocytes in the tunica media of afferent arterioles were observed. Thus, at the ultrastructural level, the kidneys of CSA treated normotensive Wistar rats do reveal morphological changes similar to those occurring in man.
Insights
Researchers developed a reliable rat model to study kidney changes from Cyclosporine A (CSA) treatment. This model successfully replicated human kidney pathologies observed in patients on CSA therapy.
Area of Science:
- Nephrology
- Pharmacology
- Experimental Pathology
Background:
- Chronic Cyclosporine A (CSA) treatment causes kidney morphological changes in humans.
- Existing experimental models have failed to reliably reproduce these CSA-induced kidney pathologies.
Purpose of the Study:
- To systematically investigate and characterize in vivo kidney changes in Wistar rats treated with CSA.
- To establish a reliable experimental model for studying CSA nephropathy.
Main Methods:
- Light and electron microscopy were used to examine in vivo fixed kidneys from CSA-treated Wistar rats.
- Morphological analysis focused on proximal tubules, glomeruli, and afferent arterioles.
Main Results:
- Proximal tubules showed inclusion bodies, vacuolization, microcalcifications, and regeneration.
- Glomeruli exhibited thickening of the parietal Bowman's capsule.
- Electron microscopy revealed myocyte necrosis in the tunica media of afferent arterioles.
Conclusions:
- The study successfully reproduced key morphological changes of CSA nephropathy in Wistar rats.
- This validated experimental model allows for ultrastructural investigation of CSA effects on the kidney, mirroring human conditions.