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  • Title: Synergistic induction of 1,25-dihydroxyvitamin D(3)- and all-trans-retinoic acid-induced differentiation of HL-60 leukemia cells by yomogin, a sesquiterpene lactone from Artemisia princeps.
    Author: Kim SH, Kim TS.
    Journal: Planta Med; 2002 Oct; 68(10):886-90. PubMed ID: 12391550.
    Abstract:
    Many anti-inflammatory agents are known to significantly enhance the terminal differentiation of some cancer cells such as leukemia cells. In this study, the effect of yomogin, a eudesmane sesquiterpene lactone isolated from Artemisia princeps with anti-inflammatory activity, was investigated in human promyelocytic leukemia HL-60 cells. Yomogin by itself induced small increases in cell differentiation, with less than 19 % of the cells attaining a differentiated phenotype. Importantly, yomogin synergistically enhanced differentiation of HL-60 cells in a dose-dependent manner when combined with either 5 nM 1,25-dihydroxyvitamin D(3) [1,25-(OH)(2) D(3)] or 50 nM all- trans retinoic acid (all- trans RA). Cytofluorometric analysis and morphologic studies indicated that the combinations of yomogin and 1,25-(OH)(2) D(3) stimulated differentiation to monocytes whereas the combinations of yomogin and all- trans RA stimulated differentiation to granulocytes. These results suggest that yomogin may be useful in combination with 1,25-(OH)(2) D(3) or all- trans-RA in the differentiation therapy for myeloid leukemias. Abbreviations. 1,25-(OH)(2) D(3) :1,25-dihydroxyvitamin D(3) FITC:fluorescein isothiocyanate NBT:nitroblue tetrazolium RA:retinoic acid PE:phytoerythrin
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