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Frequency of hydronephrosis in Wistar rats
Laboratory Animal Science
|October 1, 1979
Summary
Hydronephrosis, a kidney condition, occurred more frequently in male Wistar rats than females, particularly on the right side and in specific age groups. This study highlights sex-based differences in rat kidney health.
Area of Science:
- Nephrology
- Comparative Pathology
- Rodent Models
Background:
- Hydronephrosis is a condition characterized by swelling of the kidney due to urine backup.
- Understanding the prevalence and risk factors for hydronephrosis in laboratory animals is crucial for research integrity.
- Wistar rats are a common model organism in biomedical research.
Purpose of the Study:
- To investigate the gross pathological findings of hydronephrosis and ureteral dilation in a large cohort of Wistar rats.
- To determine the frequency and laterality of hydronephrosis in Wistar rats.
- To analyze potential sex- and age-based differences in hydronephrosis prevalence.
Main Methods:
- Gross examination of kidneys from 1806 Wistar rats.
- Documentation of hydronephrosis and ureteral dilation.
- Statistical analysis to compare frequencies between sexes and age groups.
Main Results:
- Hydronephrosis was observed in 11% of right kidneys and 0.3% of left kidneys.
- The overall frequency of hydronephrosis was significantly higher in male rats (181/1305) compared to female rats (23/501).
- Male rats exhibited a statistically greater frequency of hydronephrosis at 5, 6, 8, and 9 weeks of age compared to age-matched females.
Conclusions:
- Hydronephrosis is more prevalent in male Wistar rats than in female Wistar rats.
- Right-sided hydronephrosis is more common than left-sided hydronephrosis in this rat population.
- Age and sex are significant factors influencing the occurrence of hydronephrosis in Wistar rats.
