title: Inhibitory effect of turmeric curcuminoids on FLT3 expression and cell cycle arrest in the FLT3-overexpressing EoL-1 leukemic cell line.
abstract: Leukemia is a hematologic malignancy with a frequent incidence and high mortality rate. Previous studies have shown that the FLT3 gene is overexpressed in leukemic blast cells, especially in acute myeloid leukemia. In this study, a commercially available curcuminoid mixture (1), pure curcumin (2), pure demethoxycurcumin (3), and pure bisdemethoxycurcumin (4) were investigated for their inhibitory effects on cell growth, FLT3 expression, and cell cycle progression in an FLT3-overexpressing EoL-1 leukemic cell line using an MTT assay, Western blotting, and flow cytometry, respectively. The mixture (1) and compounds 2-4 demonstrated cytotoxic effects with IC50 values ranging from 6.5 to 22.5 μM. A significant decrease in FLT3 protein levels was found after curcuminoid treatment with IC20 doses, especially with mixture 1 and compound 2. In addition, mixture 1 and curcumin (2) showed activity on cell cycle arrest at the G0/G1 phase and decreased the FLT3 and STAT5A protein levels in a dose-dependent manner. Compound 2 demonstrated the greatest potential for inhibiting cell growth, cell cycle progression, and FLT3 expression in EoL-1 cells. This investigation has provided new findings regarding the effect of turmeric curcuminoids on FLT3 expression in leukemic cells.
authors.affiliation: Nanoscience and Nanotechnology Program, Faculty of Graduate School, Chiang Mai University , Chiang Mai 50200, Thailand.
authors.forename: Singkome
authors.initials: S
authors.lastname: Tima
authors.forename: Hideki
authors.initials: H
authors.lastname: Ichikawa
authors.forename: Chadarat
authors.initials: C
authors.lastname: Ampasavate
authors.forename: Siriporn
authors.initials: S
authors.lastname: Okonogi
authors.forename: Songyot
authors.initials: S
authors.lastname: Anuchapreeda
mesh_terms: D059447:Cell Cycle Checkpoints / Q000187:drug effects*; D049109:Cell Proliferation / Q000187:drug effects; D030024:Curcuma / Q000737:chemistry*; D003474:Curcumin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000494:pharmacology; D036381:Diarylheptanoids; D006801:Humans; D015470:Leukemia, Myeloid, Acute / Q000188:drug therapy; D015394:Molecular Structure; D051941:fms-Like Tyrosine Kinase 3 / Q000235:genetics*
chemical_list: D036381:Diarylheptanoids; C034786:bisdemethoxycurcumin; D051941:fms-Like Tyrosine Kinase 3; D003474:Curcumin; C050229:demethoxycurcumin