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Protocol for the Solid-phase Synthesis of Oligomers of RNA Containing a 2'-O-thiophenylmethyl Modification and Characterization via Circular Dichroism
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Bioreductive deprotection of 4-nitrobenzyl group on thymine base in oligonucleotides for the activation of duplex

Hisao Saneyoshi1, Yuki Hiyoshi1, Koichi Iketani1

  • 1Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.

Bioorganic & Medicinal Chemistry Letters
|November 24, 2015
PubMed

Insights

Modified oligonucleotides act as prodrugs for hypoxic cells. Deprotection under bioreductive conditions enables stable DNA duplex formation, suggesting targeted therapeutic potential.

Area of Science:

  • Biochemistry
  • Medicinal Chemistry
  • Molecular Biology

Background:

  • Hypoxic cells present a challenge for cancer therapy due to resistance to conventional treatments.
  • Prodrug strategies offer a way to selectively activate therapeutic agents under specific cellular conditions.

Purpose of the Study:

  • To synthesize and evaluate oligonucleotides modified with 4-O-(4-NO2-benzyl)thymine residues.
  • To assess the prodrug potential of these modified oligonucleotides against hypoxic cells.

Main Methods:

  • Synthesis of oligonucleotides incorporating 4-O-(4-NO2-benzyl)thymine.
  • Evaluation of duplex formation stability under non-hypoxic and bioreductive conditions.

Main Results:

  • Modified oligonucleotides showed unstable duplex formation under non-hypoxic conditions.
  • Deprotection of thymine residues under bioreductive conditions restored stable duplex formation with target oligonucleotides.

Conclusions:

  • The synthesized oligonucleotides function as prodrugs, activated under hypoxic conditions.
  • This prodrug approach enables targeted oligonucleotide-based therapies in hypoxic environments.
Keywords:
HybridizationHypoxiaNucleic acid-based therapeuticsProdrugProtecting group

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