Imaging beyond the diagnosis: Image-guided enzyme/prodrug cancer therapy

Xinyi Tong, Xishan Chen, Cong Li

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The ideal therapy would target cancer cells while sparing normal tissue. However, in most conventional chemotherapies normal cells are damaged together with cancer cells resulting in the unfortunate side effects. The principle underlying enzyme/prodrug therapy is that a prodrug-activating enzyme is delivered or expressed in tumor tissue following which a non-toxic prodrug is administered systemically. Non-invasive imaging modalities can fill an important niche in guiding prodrug administration when the enzyme concentration is detected to be high in the tumor tissue but low in the normal tissue. Therefore, high therapeutic efficacy with minimized toxic effect can be anticipated. This review introduces the latest developments of molecular imaging in enzyme/prodrug cancer therapies. We focus on the application of imaging modalities including magnetic resonance imaging, position emission tomography and optical imaging in monitoring the enzyme delivery/expression, guiding the prodrug administration and evaluating the real-time therapeutic response in vivo.

Original languageEnglish (US)
Pages (from-to)4-12
Number of pages9
JournalActa Biochimica et Biophysica Sinica
Issue number1
StatePublished - Jan 2011
Externally publishedYes


  • cancer
  • enzyme
  • molecular imaging
  • prodrug
  • therapy

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics


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