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Targeting: the ADEPT story so far

K D Bagshawe1

  • 1Medical Oncology, Imperial College London, UK. kbagshawe@googlemail.com

Current Drug Targets
|February 10, 2009
PubMed

Insights

Antibody-directed enzyme prodrug therapy uses a three-component system to target cytotoxic drugs specifically to cancer cells. This approach enhances drug efficacy and minimizes systemic toxicity for cancer treatment.

Area of Science:

  • Oncology
  • Pharmacology
  • Biotechnology

Background:

  • Antibody-directed enzyme prodrug therapy (ADEPT) is a targeted cancer treatment strategy.
  • It aims to localize potent cytotoxic drugs exclusively at tumor sites, minimizing systemic exposure.

Purpose of the Study:

  • To review the principles and progress of ADEPT.
  • To highlight the importance of a three-component system for optimal therapeutic outcomes.

Main Methods:

  • Delivery of a non-human enzyme conjugated to a tumor-targeting antibody to cancer sites.
  • Administration of a prodrug that is selectively activated by the enzyme into a cytotoxic agent at the tumor.
  • Use of a secondary agent to clear circulating enzyme from the bloodstream.

Main Results:

  • Small-scale clinical trials using unrefined agents showed encouraging results.
  • Recent efforts to simplify the system to two components have had limited success.

Conclusions:

  • The three-component ADEPT system is crucial for future advancements in targeted cancer therapy.
  • Maintaining all three components is essential for maximizing efficacy and safety.

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