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CD73: a potent suppressor of antitumor immune responses

Paul A Beavis1, John Stagg, Phillip K Darcy

  • 1Cancer Immunology Program, Trescowthick Laboratories, Peter MacCallum Cancer Centre, St. Andrews Place, East Melbourne, Victoria 3002, Australia. paul.beavis@petermac.org

Trends in Immunology
|April 11, 2012
PubMed

Insights

Tumors evade immune responses by producing adenosine, which inhibits T cells. Targeting CD73, an enzyme that generates adenosine, offers a promising strategy to enhance cancer immunotherapy and reduce tumor growth.

Area of Science:

  • Immunology
  • Oncology
  • Biochemistry

Background:

  • Tumors employ immune evasion tactics, including adenosine generation in the tumor microenvironment.
  • Adenosine suppresses crucial antitumor T cell responses.
  • CD73 is a key enzyme responsible for adenosine production by tumor cells and immune cells.

Purpose of the Study:

  • To review the role of adenosine in suppressing antitumor immunity.
  • To examine the evidence supporting CD73 inhibition as a cancer treatment strategy.

Main Methods:

  • Literature review of studies on adenosine, CD73, and cancer immunology.
  • Analysis of the impact of adenosine on T cell function.
  • Evaluation of preclinical and clinical data on CD73-targeted therapies.

Main Results:

  • Adenosine accumulation in tumors significantly impairs T cell-mediated antitumor activity.
  • CD73 is expressed on various cells within the tumor microenvironment, contributing to adenosine generation.
  • Targeting CD73 demonstrates potential in reducing tumorigenesis and metastasis.
  • Inhibition of CD73 can enhance the efficacy of T cell-based cancer therapies.

Conclusions:

  • CD73-mediated adenosine production is a critical mechanism of tumor immune evasion.
  • Targeting CD73 represents a viable therapeutic strategy to overcome immune suppression and improve cancer treatment outcomes.

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