Adenosine 5’-methylenediphosphate is an inhibitor of ecto-5’-nucleotidase, also known as CD73, with a K_ivalue of 37 nM.¹It inhibits cAMP accumulation induced by adenosine 5’-monophosphate , adenosine 5’-diphosphate , or adenosine 5’-triphosphate but not adenosine in VA-13 human fibroblasts when used at a concentration of 100 µM. Adenosine 5’-methylenediphosphate reduces proliferation of U138MG glioma cells, as well as inhibits the invasion and migration of MHCC97H hepatocellular carcinoma (HCC) cells in a migration assay.^2,3It increases tumor infiltration of CD3⁺CD8⁺T cells and reduces tumor growth in a K1735 murine melanoma model when administered at a dose of 400 µg/mouse.⁴

1.Bruns, R.F.Adenosine receptor activation by adenine nucleotides requires conversion of the nucleotides to adenosineNaunyn Schmiedebergs Arch. Pharmacol.315(1)5-13(1980) 2.Braganhol, E., Tamajusuku, A.S.K., Bernardi, A., et al.Ecto-5′-nucleotidase/CD73 inhibition by quercetin in the human U138MG glioma cell lineBiochim. Biophys. Acta1770(9)1352-1359(2007) 3.Shali, S., Yu, J., Zhang, X., et al.Ecto\5′\nucleotidase (CD73) is a potential target of hepatocellular carcinomaJ. Cell Physiol.234(7)10248-10259(2018) 4.Forte, G., Sorrentino, R., Montinaro, A., et al.Inhibition of CD73 improves B cell-mediated anti-tumor immunity in a mouse model of melanomaJ. Immunol.189(5)2226-2233(2021)