Related Experiment Videos
Species differences in response to renal ischemia.
Archives of Surgery (Chicago, Ill. : 1960)
|May 1, 1976
Summary
Species survival after kidney damage differs due to body size, not kidney susceptibility. Larger animals have more recovery time, explaining apparent differences in renal ischemia tolerance.
Area of Science:
- Nephrology
- Comparative Physiology
- Animal Models
Background:
- Species exhibit varied tolerance to renal ischemia.
- The underlying cause of these differences is debated.
- Potential factors include whole-animal response versus direct kidney susceptibility.
Purpose of the Study:
- To investigate the relationship between animal body size and survival time following induced renal ischemia.
- To determine if species-specific differences in renal ischemia tolerance are due to kidney susceptibility or systemic response.
- To establish correlations between metabolic rate, body size, and survival without renal function.
Main Methods:
- Bilateral nephrectomy was performed on mice, rats, rabbits, and pigs.
- Survival times were recorded for each species.
- Data were analyzed to correlate body size, metabolic rate, and survival duration.
Main Results:
- Larger animals, despite having relatively smaller kidneys, survived longer after nephrectomy.
- Survival time was inversely proportional to metabolic rate and directly proportional to body size.
- A simple relationship was found between metabolic rate, body size, and survival time without renal function.
Conclusions:
- Apparent species differences in renal ischemia tolerance are explained by the whole-animal response, specifically the time available for kidney recovery.
- Larger body size provides a longer window for renal recovery, irrespective of inherent kidney susceptibility.
- Metabolic rate and body size are key determinants of survival in the absence of kidney function.