Mesangium in rats after E. coli neurotoxin shock: a morphometric and light microscopic analysis
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Abstract:
The renal corpuscles of 28 specific-pathogen-free Wistar rats fixed by perfusion were examined light microscopically and morphometrically following experimental protracted neurotoxin shock. The mean diameter of the center sections of 420 renal corpuscles was 113.0 micrometers. The mesangial portion occupied 9.5% of the total area of the renal corpuscle in control rats and increased to a maximum of 17.25% in experimental rats. The number of mesangial nuclei per renal corpuscle in rats with protracted shock showed that expansion of the mesangium with compression of capillary loops was not caused solely by an increase in the number of cells. Furthermore, there was an enlargement of the mesangial cytoplasm and matrix. Activation and proliferation of connective tissue in rats with protracted shock could be observed in the interstitium of various organs as well as in the mesangium of the glomerulus.
Insights
Protracted neurotoxin shock significantly alters rat renal corpuscles, increasing mesangial area and matrix. This suggests connective tissue changes contribute to kidney damage beyond cell proliferation.
Area of Science:
- Nephrology
- Pathology
- Toxicology
Background:
- Renal corpuscle structure is vital for kidney function.
- Neurotoxin-induced shock can impact organ systems, including the kidneys.
Purpose of the Study:
- To investigate the morphometric changes in renal corpuscles of Wistar rats subjected to experimental protracted neurotoxin shock.
- To determine the contribution of mesangial expansion and connective tissue changes to kidney pathology.
Main Methods:
- Light microscopy and morphometric analysis of renal corpuscles from 28 specific-pathogen-free Wistar rats.
- Comparison between control rats and rats experiencing protracted neurotoxin shock.
Main Results:
- The mesangial portion of renal corpuscles increased from 9.5% in controls to 17.25% in experimental rats.
- Mesangial expansion was attributed to increased cytoplasm and matrix, not solely cell proliferation.
- Connective tissue activation and proliferation were observed in the glomerulus mesangium and organ interstitium.
Conclusions:
- Protracted neurotoxin shock induces significant mesangial expansion and matrix enlargement in rat renal corpuscles.
- These changes indicate a role for connective tissue remodeling in the kidney's response to shock.
- Findings highlight the complex pathology of the renal corpuscle under toxicological stress.
