Abstract

CD73 is expressed on certain types of leukocytes and tumor cells and is known as a poor prognostic factor in patients. CD73 catalyzes conversion of extracellular adenosine monophosphate (AMP) to adenosine (Ado) which accumulates in the tumor microenvironment (TME). Ado suppresses immune activation through Ado receptors, allowing tumors to escape from the host immune system. Suppressing CD73 activity provokes T-cell activation and reverses immune suppression exerted by Ado. Thus, the inhibition of CD73 by anti-CD73 antibodies may provide potent cancer immunotherapy options.

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