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5/6th Nephrectomy in Combination with High Salt Diet and Nitric Oxide Synthase Inhibition to Induce Chronic Kidney Disease in the Lewis Rat
Published on: July 3, 2013
Insights into chronic cyclosporine nephrotoxicity
1Department of Medicine and Pharmacology, Oregon Health Sciences University 97201 Portland, USA.
International Journal of Clinical Pharmacology and Therapeutics
|November 1, 1996
Summary
Cyclosporine causes kidney damage, but blocking the renin-angiotensin system in rats reduces chronic scarring. This suggests a new strategy for managing long-term transplant patients on cyclosporine.
Area of Science:
- Nephrology
- Pharmacology
- Transplantation Immunology
Background:
- Cyclosporine is vital for organ transplant immunosuppression.
- A major side effect is dose-dependent nephrotoxicity, affecting both acute and chronic kidney function.
- Chronic cyclosporine nephropathy involves afferent arteriolopathy, tubulointerstitial fibrosis, and glomerulosclerosis.
Purpose of the Study:
- To investigate the role of the renin-angiotensin system in chronic cyclosporine nephropathy.
- To evaluate the efficacy of renin-angiotensin system inhibition in an experimental model.
Main Methods:
- Developed a salt-depleted rat model to mimic chronic cyclosporine nephropathy.
- Administered angiotensin II receptor blockade or ACE inhibition to assess effects on kidney lesions.
- Analyzed the impact on vascular and tubulointerstitial changes, as well as TGF-beta 2 and osteopontin expression.
Main Results:
- The renin-angiotensin system is activated in chronic cyclosporine nephropathy.
- Inhibition of this system significantly reduced tubulointerstitial fibrosis and arteriolopathy.
- TGF-beta 2 and osteopontin involvement in scarring was abrogated by renin-angiotensin system inhibition.
Conclusions:
- The renin-angiotensin system plays a key role in the chronic kidney damage caused by cyclosporine.
- Targeting this system offers a potential strategy to mitigate cyclosporine-induced nephropathy.
- Findings may lead to improved long-term management for transplant recipients on cyclosporine therapy.
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