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Structure-nephrotoxicity relationships for meta-substituted N-phenylsuccinimides
Journal of Applied Toxicology : JAT
|June 1, 1987
Summary
Substituent properties on N-phenylsuccinimide fungicides do not predict kidney toxicity. N-(3-chlorophenyl)succinimide showed mild nephrotoxicity, indicating electronic effects and lipophilicity are poor indicators of fungicide risk.
Area of Science:
- Agricultural Chemistry
- Toxicology
- Medicinal Chemistry
Background:
- N-phenylsuccinimide (NPS) derivatives are under investigation as agricultural fungicides.
- Understanding the toxicological profile of these compounds is crucial for their development.
Purpose of the Study:
- To investigate the correlation between electronic properties of phenyl ring substituents in meta-substituted NPS derivatives and their nephrotoxic potential.
- To evaluate NPS derivatives as potential agricultural fungicides based on their safety profile.
Main Methods:
- Male Fischer 344 rats were administered single intraperitoneal injections of NPS derivatives or vehicle.
- Renal function was monitored at 24 and 48 hours post-injection.
- Key indicators of nephrotoxicity including diuresis, proteinuria, hematuria, and blood urea nitrogen (BUN) were assessed.
Main Results:
- Non-halogenated NPS derivatives exhibited minimal nephrotoxicity.
- N-(3-chlorophenyl)succinimide (NCPS) was identified as the most nephrotoxic among meta-halogenated derivatives, causing mild to moderate effects.
- Observed effects included diuresis, proteinuria, hematuria, elevated BUN, and proximal tubular necrosis.
Conclusions:
- The electron-donating or withdrawing nature of phenyl ring substituents is not a reliable predictor of nephrotoxic potential in NPS fungicides.
- Lipophilicity also did not correlate with the observed nephrotoxic effects for the studied meta-substituted NPS derivatives.
- Further research is needed to identify reliable predictors of fungicide-induced nephrotoxicity.