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On a New Proposed Mechanism of 5-Fluorouracil-Mediated Cytotoxicity

Shobbir Hussain1

  • 1Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK.

Trends in Cancer
|April 30, 2020
PubMed

Insights

The cytotoxic drug 5-fluorouracil (5-FU) may have an additional mechanism of action. This involves its metabolites interacting with transfer RNAs (tRNAs) via the uracil-5 methyltransferase (U5MT), TRMT2A.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Pharmacology

Background:

  • The primary mechanism of 5-fluorouracil (5-FU) involves thymidylate synthase inhibition.
  • Emerging research highlights the role of human uracil-5 methyltransferase (U5MT), also known as TRMT2A.

Purpose of the Study:

  • To propose an additional molecular hypothesis for the action of 5-fluorouracil (5-FU).
  • To explore the interaction between 5-FU metabolites and transfer RNAs (tRNAs).

Main Methods:

  • Literature review and hypothesis formulation.
  • Analysis of recent findings on TRMT2A function.

Main Results:

  • Recent findings suggest TRMT2A interacts with 5-FU metabolites.
  • These metabolites can be incorporated into tRNAs.

Conclusions:

  • A novel hypothesis proposes TRMT2A-mediated tRNA modification as a key mechanism of 5-FU cytotoxicity.
  • This adds to the established understanding of 5-FU's action via thymidylate synthase inhibition.
Keywords:
5-fluorouracil5-methyluridineDNA break repairNUD1RNA methylationTRMT2Ahomologous recombination

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