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Synergistic AML Cell Death Induction by Marine Cytotoxin (+)-1(), 6(), 1'(), 6'(), 11(), 17()-Fistularin-3 and Bcl-2 Inhibitor Venetoclax. | LitMetric

Treatment of acute myeloid leukemia (AML) patients is still hindered by resistance and relapse, resulting in an overall poor survival rate. Recently, combining specific B-cell lymphoma (Bcl)-2 inhibitors with compounds downregulating myeloid cell leukemia (Mcl)-1 has been proposed as a new effective strategy to eradicate resistant AML cells. We show here that 1(), 6(), 1'(), 6'(), 11(), 17()-fistularin-3, a bromotyrosine compound of the fistularin family, isolated from the marine sponge , synergizes with Bcl-2 inhibitor ABT-199 to efficiently kill Mcl-1/Bcl-2-positive AML cell lines, associated with Mcl-1 downregulation and endoplasmic reticulum stress induction. The absolute configuration of carbons 11 and 17 of the fistularin-3 stereoisomer was fully resolved in this study for the first time, showing that the fistularin we isolated from the marine sponge is in fact the (+)-11(), 17()-fistularin-3 stereoisomer keeping the known configuration 1(), 6(), 1'(), and 6'() for the verongidoic acid part. Docking studies and in vitro assays confirm the potential of this family of molecules to inhibit DNA methyltransferase 1 activity.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6316187PMC
http://dx.doi.org/10.3390/md16120518DOI Listing

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