1 Ocak 2019 Dergi makalesi Açık Erişim

Delman, Murat; Avci, Sanem Tercan; Akcok, Ismail; Kanbur, Tugce; Erdal, Esra; Cagir, Ali

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    <subfield code="a">Antiproliferative activity of (R)-4 '-methylklavuzon on hepatocellular carcinoma cells and EpCAM(+)/CD133(+) cancer stem cells via SIRT1 and Exportin-1 (CRM1) inhibition</subfield>
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    <subfield code="a">Cytotoxic effects of (R)-4'-methylklavuzon were investigated on hepatocellular carcinoma cells (HuH-7 and HepG2) and HuH-7 EpCAM(+)/CD133(+) cancer stem cells. IC50 of (R)-4'-methylklavuzon was found as 1.25 mu M for HuH-7 parental cells while it was found as 2.50 mu M for HuH-7 EpCAM(+)/CD133(+) cancer stem cells. (R)-4'-methylklavuzon tended to show more efficient in vitro cytotoxicity with its lower IC50 values on hepatocellular carcinoma cell lines compared to its lead molecule, goniothalamin and FDA-approved drugs, sorafenib and regorafenib. Cell-based Sirtuin/HDAC enzyme activity measurements revealed that endogenous Sirtuin/HDAC enzymes were reduced by 40% compared to control. SIRT1 protein levels were upregulated indicating triggered DNA repair mechanism. p53 was overexpressed in HepG2 cells. (R)-4'methylklavuzon inhibited CRM1 protein providing increased retention of p53 and RIOK2 protein in the nucleus. HuH-7 parental and EpCAM(+)/CD133(+) cancer stem cell spheroids lost intact morphology. 3D HepG2 spheroid viabilities were decreased in a correlation with upregulation in p53 protein levels. (C) 2019 Elsevier Masson SAS. All rights reserved.</subfield>
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