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Updated: May 27, 2026

Continuous Fluorescence-Based Endonuclease-Coupled DNA Methylation Assay to Screen for DNA Methyltransferase Inhibitors
Published on: August 5, 2022
[Antimetabolites]
1Centre Oscar-Lambret, Université Lille Nord de France. a-Lansiaux@o-lambret.fr
Abstract:
Antimetabolites are cytotoxic agents, which have been developed for more than 50 years. Which cancer patient did not receive or will not receive 5-fluorouracil or methotrexate during the evolution his or her disease? Antimetabolites are defined as interfering with the synthesis of the DNA constituents; they are structural analogues, either of purine and pyrimidine bases (or the corresponding nucleosides), or of folate cofactors, which are involved at several steps of purine and pyrimidine biosynthesis. Their first mechanism of action is, therefore, to induce depletion in nucleotides inducing in turn an inhibition of DNA replication. However, some of them are able to get inserted fraudulently into nucleic acids, inducing structural abnormalities leading to cell death by other mechanisms, including DNA breaks. We present in this paper, for the three classes of antimetabolites, both ancient and recent molecules as well as molecules still in clinical trials, without exhaustivity.
Insights
Antimetabolites are chemotherapy drugs that disrupt DNA synthesis, crucial for cancer treatment. This review covers various antimetabolite agents, including established and novel compounds, used in cancer therapy.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Context:
- Antimetabolites represent a cornerstone of cancer chemotherapy, with a history spanning over five decades.
- Their development has significantly impacted treatment strategies for numerous malignancies.
Purpose:
- To provide a comprehensive overview of antimetabolite agents.
- To discuss their mechanisms of action, encompassing DNA synthesis inhibition and direct nucleic acid incorporation.
- To review both historical and contemporary antimetabolites, including those in clinical trials.
Summary:
- Antimetabolites function by interfering with the synthesis of DNA building blocks (purines and pyrimidines) or folate cofactors.
- They act as structural analogues of natural metabolites, leading to nucleotide depletion and DNA replication inhibition.
- Some antimetabolites can be incorporated into DNA, causing structural damage and cell death via DNA breaks.
Impact:
- Highlights the broad applicability of antimetabolites in cancer treatment.
- Underscores the ongoing evolution and clinical relevance of these cytotoxic agents.
- Provides a foundational resource for understanding antimetabolite chemotherapy.
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