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Related Experiment Videos

Toxicological evaluation of u-hEGF

R Maraschin1, R Bussi, A Conz

  • 1Istituto di Ricerche Biomediche Antoine Marxer, RBM S.p.A. Ivrea (Torino), Italy.

Toxicologic Pathology
|May 1, 1995
PubMed
Summary

Urinary human epidermal growth factor (u-hEGF) showed no mutagenic or clastogenic effects. While rats tolerated repeated doses, monkeys experienced lethality and severe clinical signs, indicating species-specific toxicity.

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Area of Science:

  • Toxicology
  • Pharmacology
  • Biochemistry

Background:

  • Urinary human epidermal growth factor (u-hEGF) is a biologically active protein.
  • Understanding its toxicological profile is crucial for potential therapeutic applications.

Purpose of the Study:

  • To comprehensively evaluate the toxicological profile of u-hEGF.
  • To assess mutagenicity, general toxicity, and teratogenicity in animal models.

Main Methods:

  • In vitro and in vivo mutagenicity assays (Ames test, chromosome aberration, micronucleus test).
  • Acute and repeated dose toxicity studies via subcutaneous (sc) and intravenous (i.v.) administration in rats and cynomolgus monkeys.
  • Embryofetal toxicity and teratogenicity studies in Sprague-Dawley rats and New Zealand White rabbits.

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Main Results:

  • No mutagenic or clastogenic effects were observed for u-hEGF.
  • Rats showed dose-related epithelial hyperplasia but no detrimental health effects after repeated i.v. administration.
  • Cynomolgus monkeys exhibited lethality, severe clinical signs (GI effects, respiratory distress, weight loss), and epithelial hyperplasia after repeated sc administration.
  • Embryofetal studies in rats revealed no adverse effects, while rabbits showed mortality and severe clinical signs, with most surviving females experiencing resorptions.

Conclusions:

  • u-hEGF demonstrates a lack of genotoxicity.
  • Species-specific toxicity was observed, with significant adverse effects and lethality in monkeys and rabbits, but not in rats.
  • The compound's safety profile is highly dependent on the species and route of administration.