کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1392812 | 1501161 | 2012 | 13 صفحه PDF | دانلود رایگان |

A new class of methyl esters of flavonoids, with different substituents on the B ring were synthesized and evaluated for their antiproliferative activity against the human leukemia cell line HL-60. The presence of either a methyl group (1f) or a chlorine atom (1o) at position 2′ of the B ring played an important role in affecting antiproliferative activity. The cytotoxic effects of these compounds were accompanied by the concentration- and time-dependent appearance of DNA- and nuclear-fragmentation, increase in the percentage of sub-G1 cells, and processing of multiple caspases and poly(ADP-ribose)polymerase cleavage. Pretreatment of cells with the specific mitogen-activated extracellular kinases (MEK) 1/2 inhibitor PD98059, together with 1f and 1o, resulted in an important enhancement of cell death, which might have clinical implications for the use of both compounds in combination with MEK 1/2 inhibitors as potential therapeutic agents.
Figure optionsDownload as PowerPoint slideHighlights
► New methyl esters of flavone-8-carboxylic acid analogs were synthesized.
► Two selected methyl esters display cytotoxic activities in human leukemia cells.
► These flavones induce apoptosis and processing of multiple caspases.
► Apoptosis is enhanced by the inhibition of mitogen-activated extracellular kinases.
Journal: European Journal of Medicinal Chemistry - Volume 55, September 2012, Pages 284–296