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TL02-59 is an orally active, selective Src-family kinase Fgr inhibitor with an IC50 of 0.03 nM. TL02-59 also inhibits Lyn and Hck with IC50s of 0.1 nM and 160 nM, respectively. TL02-59 potently suppresses acute myelogenous leukemia (AML) cell growth[1].

TL02-59 inhibits the growth and induced apoptosis of AML cell lines expressing this kinase with single-digit nM potency[1]. TL02-59 induces growth arrest in primary AML bone marrow samples[1]. TL02-59 (0.1-1000 nM; 6 hours) potently inhibits Fgr autophosphorylation in TF-1 cells, with paritial inhibition at 0.1-1 nM and complete inhibition above 10 nM. Hck, Lyn and Flt3 are inhibited in the 100 to 1000 nM range[1]. Western Blot Analysis[1] Cell Line: TF-1 myeloid cells

TL02-59 (oral administration; 1 and 10 mg/kg; for three weeks) completely eliminates AML cells from the spleen and peripheral blood in a mouse model of AML, while dramatically suppressing bone marrow involvement[1]. TL02-59 has a t1/2 of 5.7 h by i.v injection and 6.5 h by p.o. administration, respectively[1]. Animal Model: NOD.Cg-PrkdcscidIl2rgtm1Wjl/SzJ (NSG) mice with human MV4-11 AML cells

[1]. Weir MC, et al. Selective Inhibition of the Myeloid Src-Family Kinase Fgr Potently Suppresses AML Cell Growth in Vitro and in Vivo. ACS Chem Biol. 2018 Jun 15;13(6):1551-1559.

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