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Genetic polymorphisms in drug targets have emerged as critical determinants of interindividual variability in drug response and toxicity. Pharmacogenomic investigations increasingly focus on identifying these variations to personalize and optimize therapeutic interventions. A drug target may be a receptor, enzyme, or signaling protein involved in pharmacologic responses or disease-related pathways. While early pharmacogenetic studies focused primarily on drug metabolism, current research...
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Targeting nuclear thymidylate biosynthesis.

James Chon1, Patrick J Stover2, Martha S Field3

  • 1Graduate Field of Biochemistry, Molecular and Cellular Biology, Cornell University, Ithaca, NY 14853, USA.

Molecular Aspects of Medicine
|November 24, 2016
PubMed
Summary
This summary is machine-generated.

Thymidylate biosynthesis is crucial for DNA synthesis and cell division, making it a key cancer target. Nuclear localization of this pathway, regulated by SUMOylation, is vital for the effectiveness of antifolate cancer therapies.

Keywords:
AntifolateFolate-mediated one-carbon metabolismNuclear thymidylate synthesisSumoylationThymidylate synthase

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cancer Therapeutics

Background:

  • Thymidylate (dTMP) biosynthesis is essential for DNA synthesis and cell division.
  • Antifolates and nucleotide analogs targeting dTMP synthesis are common cancer treatments.
  • Emerging evidence suggests dTMP synthesis occurs within the cell nucleus.

Purpose of the Study:

  • To review the mechanisms of antifolate drugs like 5-fluorouracil in cancer treatment.
  • To examine the role of nuclear localization of dTMP synthesis in therapeutic efficacy.
  • To explore the involvement of SUMOylation in nuclear dTMP synthesis.

Main Methods:

  • Review of existing literature on dTMP synthesis inhibitors and nuclear localization.
  • Analysis of the role of small ubiquitin-like modifier (SUMO) protein in pathway enzyme modification.
  • Examination of studies investigating SUMOylation's impact on cell proliferation in cancer models.

Main Results:

  • Nuclear localization of the de novo dTMP synthesis pathway is critical for antifolate therapy efficacy.
  • SUMOylation is essential for the nuclear import of dTMP synthesis enzymes.
  • Disruption of the SUMO pathway inhibits cancer cell proliferation.

Conclusions:

  • The nuclear localization of dTMP biosynthesis is a key determinant of antifolate drug effectiveness.
  • Targeting nuclear dTMP synthesis, potentially via SUMOylation pathways, represents a promising therapeutic strategy.
  • Understanding these mechanisms can lead to improved cancer treatment protocols.