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(E)-13-(Aryl/heteroaryl)parthenolides (5a-i and 6a-i) were synthesized and evaluated for their ability to modify cell cycle progression during progesterone-stimulated Xenopus oocyte maturation and screened for their anticancer activity against a panel of 60 human cancer cell lines. (E)-13-(4-aminophenyl) parthenolide (5b) caused a significant inhibition of progesterone-stimulated oocyte maturation, and was determined to function downstream of MAP kinase signaling, but upstream of the activation of the universal G2/M regulator, M-phase promoting factor (MPF), cyclin B/Cyclin-dependent kinase (CDK). The compound (E)-13-(2-bromo-phenyl)parthenolide (5c) activates oocyte maturation independently of progesterone stimulation. Compounds 5b and 5c displayed modest growth inhibition on select cancer cell lines at 10 μM dose when tested on the panel of 60 cancer cell lines. By contrast, compounds (5f and 7) did not modulate oocyte maturation but did exhibit micromolar level growth inhibition against most of the human cancer cell lines over a range of doses. Together, our findings indicate that screening of compounds in the oocyte maturation assay may identify additional effective cell cycle regulatory compounds that do not necessarily exert overt cytotoxicity as assessed in traditional drug screening assays.
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25117652 ???displayArticle.pmcLink???PMC4167622 ???displayArticle.link???Eur J Med Chem ???displayArticle.grants???[+]
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