Adrenocortical Activation by 5-Fluorouracil and its Possible Reversal by Thymidine

  • P. Preziosi
  • M. Vacca
Conference paper
Part of the Archives of Toxicology book series (TOXICOLOGY, volume 6)


5-Fluorouracil (FU) provokes a long lasting and dose-related increase of plasma corticosterone in the rat which may be considered a stress reaction involving CRH-ACTH release. Thymidine (TdR) believed to act as a specific and effective antidote against FU toxicity, administered i.m. or i.p. at different times before or after the i.p. or i.v. injection of 100 mg/kg FU on a molar basis 0.1 : 1–10.7 : 1 does not antagonize or, at the highest dosage seem to increase the FU induced adrenocortical activation. Thus, the FU adrenal activation is modulated by a mechanism not involving the block of the de novo thymidilate synthesis.

Key words

5-Fluorouracil Thymidine Adrenocortical activation Thymidilate synthetase Thymine 


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Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • P. Preziosi
    • 1
  • M. Vacca
    • 1
  1. 1.Department of Pharmacology, School of MedicineCatholic UniversityRomeItaly

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