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. 1986;3(2):111-8.
doi: 10.1007/BF02934563.

Modulation of the effects of fluoropyrimidines on toxicity and tumor inhibition in rodents by uridine and thymidine

Modulation of the effects of fluoropyrimidines on toxicity and tumor inhibition in rodents by uridine and thymidine

H R Hartmann et al. Med Oncol Tumor Pharmacother. 1986.

Abstract

Uridine and/or thymidine were administered concomitantly with 5-fluorouracil (5-FU) and 5'-deoxy-5-fluorouridine (5'-dFUR) to mice and rats in order to establish whether the physiological nucleosides acting in vitro as antagonists can diminish fluoropyrimidine toxicity in vivo. In addition, the influence of orally co-administered uridine on antitumor activity of 5-FU and 5'-dFUR in mice has been studied. All co-administrations aggravated the general toxicity of both fluoropyrimidines. Tumor inhibition was enhanced by uridine, but the therapeutic ratio was not improved compared to monotherapy with either 5-FU or 5'-dFUR.

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