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Tumor-Selective and Chemical Activation Strategies for Nitrogen Mustard Prodrugs

Thilini Nimasha Fernando Ponnamperumage1, Mayurika Mahendran1, Wasiu Olaniyi Awoyera1

  • 1Department of Chemistry and Biochemistry and the Milwaukee Institute For Drug Discovery, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, USA.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|January 23, 2026
PubMed

Insights

Nitrogen mustard prodrugs are designed for targeted cancer therapy, using tumor-specific cues like hypoxia and ROS for controlled activation. This enhances efficacy and reduces systemic toxicity for precision oncology.

Area of Science:

  • Oncology
  • Medicinal Chemistry
  • Drug Delivery

Background:

  • Nitrogen mustards are potent DNA-alkylating agents with limited clinical use due to toxicity and poor tumor selectivity.
  • Tumor-selective prodrug strategies offer a solution by enabling controlled activation of inert precursors within the tumor microenvironment.

Purpose of the Study:

  • To review molecular design principles for nitrogen mustard prodrugs activated by tumor-specific cues.
  • To discuss integration with advanced delivery systems for improved therapeutic outcomes.

Main Methods:

  • Exploitation of tumor-specific triggers: hypoxia, acidic pH, reactive oxygen species (ROS), and redox imbalance.
  • Molecular design focusing on scaffold modifications and linker chemistries for stimulus-responsive release.
  • Integration with polymeric carriers and nanoplatforms for enhanced tumor accumulation.

Main Results:

  • Development of prodrugs with spatiotemporally controlled activation, liberating active nitrogen mustard (NM) in situ.
  • Strategies achieve precise payload release, facilitating targeted DNA cross-linking within tumors.
  • Enhanced tumor accumulation and therapeutic indices with minimized off-target toxicity.

Conclusions:

  • Bioorthogonal and tumor-selective activation strategies are redefining precision oncology for nitrogen mustard prodrugs.
  • Responsive activation to hypoxia, ROS, and pH significantly improves therapeutic potential.
  • Advanced delivery platforms further enhance the efficacy and safety of these targeted agents.
Keywords:
nitrogen mustard prodrugsselective alkylating agentsstimuli‐responsive chemotherapytumor microenvironment‐responsive systemstumor‐specific bioorthogonal activation

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