title: Azinyl and diazinyl hydrazones derived from aryl N-heteroaryl ketones: synthesis and antiproliferative activity.
abstract: A series of N-heteroaryl hydrazones derived from aryl N-heteroaryl or bis-N-heteroaryl methanones was prepared in search for potential novel antitumor agents. The stereochemistry of these compounds was established by means of NMR spectroscopy. Antiproliferative activity was determined in a panel of human tumor cell lines (CCRF-CEM, Burkitt's lymphoma, HeLa, ZR-75-1, HT-29, and MEXF 276L) in vitro. Generally, the new compounds were found to be more potent (IC50 = 0.011-0.436 microM) than the ribonucleotide reductase inhibitor hydroxyurea (IC50 = 140 microM). Most of the compounds exhibited the highest activity against Burkitt's lymphoma with an IC50 of 0.011-0.035 microM. [14C]Cytidine incorporation into DNA was quantitated for selected hydrazones (Z-A, E-1, Z-3, Z-4, E-5, Z-5, E-13, E-18, Z-19, Z-24, and E-26) as a measure of the inhibition of ribonucleotide reductase in Burkitt's lymphoma cells. The E-configurated compounds were found to inhibit [14C]cytidine incorporation to a greater extent (IC50 = 0.67-5.05 microM) than the Z-isomers (IC50 = 7.20 to > 10 microM). Principal component analysis of the IC50 values obtained for inhibition of cell proliferation revealed that the cell lines tested can be grouped into three main families showing different sensitivities toward the compounds in our series [(i) CCRF-CEM, Burkitt's lymphoma, and Hela; (ii) HT-29; and (iii) MEXF 276 L].
authors.affiliation: Institute of Pharmaceutical Chemistry, University of Innsbruck, Austria.
authors.forename: J
authors.initials: J
authors.lastname: Easmon
authors.forename: G
authors.initials: G
authors.lastname: Heinisch
authors.forename: G
authors.initials: G
authors.lastname: Pürstinger
authors.forename: T
authors.initials: T
authors.lastname: Langer
authors.forename: J K
authors.initials: JK
authors.lastname: Osterreicher
authors.forename: H H
authors.initials: HH
authors.lastname: Grunicke
authors.forename: J
authors.initials: J
authors.lastname: Hofmann
mesh_terms: D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D002455:Cell Division / Q000187:drug effects; D003562:Cytidine / Q000378:metabolism; D004247:DNA / Q000096:biosynthesis; D004791:Enzyme Inhibitors / Q000138:chemical synthesis / Q000494:pharmacology; D006801:Humans; D006835:Hydrazones / Q000138:chemical synthesis* / Q000494:pharmacology; D006918:Hydroxyurea / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D015394:Molecular Structure; D012264:Ribonucleotide Reductases / Q000037:antagonists & inhibitors / Q000378:metabolism; D013329:Structure-Activity Relationship; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D004791:Enzyme Inhibitors; D006835:Hydrazones; D003562:Cytidine; D004247:DNA; D012264:Ribonucleotide Reductases; D006918:Hydroxyurea