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EPZ004777 is a specific small-molecule H3K79 methyltransferase DOT1L inhibitor that potently inhibits DOT1L in a radionuclide homogeneous assay with the half maximal inhibition concentration IC50 value of 400 pM and selectively kills a variety of MLL-rearranged leukemia cells, including an MLL-AF4 leukemia cell line MV4-11 and an MLL-AF9 leukemia cell line MOLM13 [1 & 2].

EPZ004777 has also been found to selectively inhibit the proliferation of MLL-AF10 and CALM-AF10 transformed cells in a dose dependent manner (IC50: 0.1 μM to 1 μM), in which the mRNA expression levels of two hallmark leukemogenic genes (Hoxa9 and Meis1) are suppressed by EPZ004777 in a concentration dependent manner [2].

Reference

References:

[1] Yu W, Chory EJ, Wernimont AK, Tempel W, Scopton A, Federation A, Marineau JJ, Qi J, Barsyte-Lovejoy D, Yi J, Marcellus R, Iacob RE, Engen JR, Griffin C, Aman A, Wienholds E, Li F, Pineda J, Estiu G, Shatseva T, Hajian T, Al-Awar R, Dick JE, Vedadi M, Brown PJ, Arrowsmith CH, Bradner JE, Schapira M. Catalytic site remodelling of the DOT1L methyltransferase by selective inhibitors. Nat Commun. 2012;3:1288. doi: 10.1038/ncomms2304.

[2] Chen L, Deshpande AJ, Banka D, Bernt KM, Dias S, Buske C, Olhava EJ, Daigle SR, Richon VM, Pollock RM, Armstrong SA. Abrogation of MLL-AF10 and CALM-AF10-mediated transformation through genetic inactivation or pharmacological inhibition of the H3K79 methyltransferase Dot1l. Leukemia. 2013 Apr;27(4):813-22. doi: 10.1038/leu.2012.327. Epub 2012 Nov 9.

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