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10074-G5 is a c-Myc inhibitor [1].

c-Myc is a bHLH-ZIP transcription factor involved in cell cycle progression, cellular growth and metabolism, differentiation, and apoptosis. Overexpression of c-Myc has been identified in numerous cancers, including prostate, pancreatic, lung, breast, and colon cancers, B-cell lymphoma, and leukemias. Alterations in c-Myc have been associated with cancer aggressiveness and poor treatment prognosis. Inhibition of c-Myc is an attractive pharmacological approach in the development of new anticancer treatments. Inactivation of c-Myc rapidly results in cell-cycle arrest, apoptosis, tumor vascular degeneration, redifferentiation of tumor cells, and ultimately tumor regression [1].

The IC50 values of 10074-G5 against Daudi cells and HL-60 cells were 15.6 ± 1.5 μM and 13.5 ± 2.1 μM, respectively. 10074-G5 (10 μM) inhibited c-Myc/Max dimerization and decreased total c-Myc protein expression. In C.B-17 SCID mice bearing Daudi xenografts, treatment with 10074-G5, (20 mg/kg i.v., for 10 consecutive days) significantly inhibited tumor growth with no effects on body weight.

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