Discovery of novel negletein derivatives as potent anticancer agents for acute myeloid leukemia

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Baicalin and its aglycone baicalein derived from Scutellaria baicalensis exhibited potent anticancer effects in various types of cancer cell lines. However, the unfavorable pharmaceutical properties became the main obstacle for their potential clinical development. With the aim of development of novel anticancer agents based on the skeleton of baicalin, a series of novel negletein derivatives were designed and synthesized. Among them, compound 8 (FZU-02,006) with an N,N-dimethylamino ethoxyl moiety at the C-6 position exhibited significant enhanced antiproliferative effect against HL-60 cells in vitro through regulating multisignaling pathways. These results revealed that compound 8 with the improved aqueous solubility (as HCl salt, >1 mg/ml) and enhanced antileukemia potency might serve as a promising lead for further development.

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