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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Molecular basis of fluoropyrimidine toxic effect etiology with focus on palmar-plantar erythrodysesthesia and potential antidote use
 Hartinger, Jan ; Veselý, Pavel (advisor) ; Květina, Jaroslav (referee) ; Brábek, Jan (referee)
(thesis): Palmar-plantar erythrodysesthesia (PPE) frequently accompanies the therapy with a continuous 5-FU infusion or peroral capecitabine (5-FU prodrug). In the most severe cases this adverse effect leads to discontinuation of a needful therapy. Local 10 % uridine ointment is used to prevent and treat the said adverse event. Nevertheless, this method is not generally accepted as an effective one because it has never been proved in a randomized controlled clinical trial. Most probably, a direct effect of a cytostatic compound on the skin of hands and foots causes PPE. The toxicity of 5-FU is mediated primarily by its incorporation into RNA and by thymidylate synthase (TS) inhibition and subsequent DNA synthesis disruption. The importance of particular 5-FU toxicity mechanisms varies in different cell types. For choosing the best PPE local antidote it is necessary to find out which molecular mechanism applies in keratinocytes. We have chosen pyrimidine nucleosides as the most suitable compounds for the local PPE therapy because the uridine ointment is already being used in several oncology centers in the Central Europe. In order to find out the 5-FU toxicity mechanism, we further tested the effect of calciumfolinate (CF) which strengthens the TS inhibition by 5-FU. We studied also uracil and...
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