Single Biggest Cancer Dictionary in the World
What is adenosine A2A receptor antagonist ILB2109?
adenosine A2A receptor antagonist ILB2109
Definition
An orally bioavailable immune checkpoint inhibitor and antagonist of the adenosine A2A receptor (A2AR; ADORA2A), with potential immunomodulating and antineoplastic activities. Upon oral administration, A2AR antagonist ILB2109 selectively binds to and inhibits A2AR expressed on T lymphocytes. This prevents tumor-released adenosine from interacting with the A2A receptors, thereby blocking the adenosine/A2AR-mediated inhibition of T lymphocytes. This results in the proliferation and activation of T lymphocytes, and stimulates a T-cell-mediated immune response against tumor cells. A2AR, a G protein-coupled receptor, is highly expressed on the cell surfaces of T cells and, upon activation by adenosine, inhibits their proliferation and activation. Adenosine is often overproduced by cancer cells and plays a key role in immunosuppression.