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Angiotensin converting enzyme inhibitors and progression of chronic renal failure
1University of Minnesota School of Medicine, Minneapolis.
Abstract:
Renal failure, once established by loss of a critical amount of functional renal mass, tends to be progressive. A large body of experimental evidence supports the hypothesis that glomerular capillary hypertension is important in the pathogenesis of progressive chronic renal failure of diverse types, including subtotal renal ablation and diabetic nephropathy. Converting enzyme inhibitors are effective in slowing or arresting the progression of glomerular injury in these experimental models, in association with normalization of both systemic and intrarenal pressures. Clinical studies of diabetic nephropathy and chronic renal failure of other etiologies support the concept that these same renal hemodynamic factors are important in human renal disease and that treatment with converting enzyme inhibitors may prove to be a useful therapeutic intervention. Whether the converting enzyme inhibitors have specific advantages over other antihypertensive agents due to beneficial renal hemodynamic effects, as suggested by experimental studies, is a question that awaits further investigation. Furthermore, the pathogenesis of hypertensive glomerular injury is complex and involves the participation of diverse biologic systems. We predict that a wide variety of therapeutic maneuvers, with disparate mechanisms of action, may be effective in arresting or preventing glomerular injury.
Insights
Progressive renal failure can be slowed by converting enzyme inhibitors, which normalize blood pressure in the kidneys. These findings suggest potential therapeutic benefits for chronic kidney disease and diabetic nephropathy.
Area of Science:
- Nephrology
- Cardiovascular Research
- Pharmacology
Background:
- Chronic renal failure is often progressive after significant loss of kidney function.
- Glomerular capillary hypertension is a key factor in the progression of various chronic renal failures, including diabetic nephropathy.
- Experimental evidence links glomerular hypertension to progressive renal damage.
Purpose of the Study:
- To evaluate the role of glomerular capillary hypertension in progressive chronic renal failure.
- To assess the efficacy of converting enzyme inhibitors in experimental models of renal injury.
- To explore the potential of these inhibitors as a therapeutic intervention for human renal disease.
Main Methods:
- Review of experimental evidence on glomerular capillary hypertension and renal failure progression.
- Analysis of studies on converting enzyme inhibitors in animal models (e.g., subtotal renal ablation, diabetic nephropathy).
- Examination of clinical studies investigating these factors in human diabetic nephropathy and other chronic renal failures.
Main Results:
- Converting enzyme inhibitors slow or halt glomerular injury in experimental models.
- These effects are associated with normalized systemic and intrarenal pressures.
- Clinical data suggest similar hemodynamic factors are relevant in human renal disease.
Conclusions:
- Glomerular capillary hypertension is a significant factor in progressive chronic renal failure.
- Converting enzyme inhibitors show promise for treating human renal disease by addressing these hemodynamic factors.
- Further research is needed to compare converting enzyme inhibitors with other antihypertensives and explore diverse therapeutic strategies.