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Small molecule A2a/A2b adenosine receptor antagonist

Adenosine is a powerful immunosuppressive substance produced inside tumors as a result of rapid cancer cell turnover and, in some cases, in connection with certain antitumor interventions, such as chemotherapy and radiation.

The A2a/A2b receptors, expressed on the surface of immune cells, mediate the immunosuppressive effects of adenosine.



ATP is released from tumor cells in response to cellular stress and is converted to adenosine in the extracellular tumor microenvironment.

Adenosine elicits immunosuppressive effects through direct interaction with the A2a and A2b receptors on tumor-infiltrating immune cells.

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Immune Cell Activation

Etrumadenant is a small molecule, selective dual antagonist of the A2a and A2b receptors that can prevent adenosine-mediated immunosuppression.

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Immune-Mediated Tumor Cell Death

Once the immunosuppressive effects of adenosine are blocked, activation of antitumor immune cells may be restored, which could result in tumor cell death.