AB-680 is a highly potent, reversible and selective inhibitor of CD73 (an ecto-nucleotidase), with a Ki of 4.9 pM for hCD73, displays >10,000-fold selectivity over related ecto-nucleotidases CD39. Anti-tumor activity[1].
AB-680 (AB680) inhibits soluble hCD73 with an IC50 of 0.043 nM, also inhibits hCD73 in CHO cells, suppresses CD73 in human, mouse CD8+ T Cells and hPBMC, with IC50s of 0.070, 0.008, 0.66 and 0.011 nM, respectively[1].
[1]. Lawson KV, et al. Discovery and Characterization of AB680, a Potent and Selective Small-Molecule CD73 Inhibitor for Cancer Immunotherapy.