Abstract:Introduction: High levels of immunosuppressive adenosine are found in the tumor microenvironment, reaching 50-100 μM in experimental models. Adenosine exerts its effects on immune cells primarily through the adenosine receptors A2aR/A2bR, which increase intracellular levels of cyclic AMP, leading to CREB phosphorylation (pCREB). We have previously shown that the dual A2aR/A2bR antagonist AB928 is capable of inhibiting adenosine-induced pCREB in healthy human volunteer (HV) blood lymphocytes. AB928 has also bee… Show more
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