title: 2,7-Dihydro-3H-pyridazino[5,4,3-kl]acridin-3-one derivatives, novel type of cytotoxic agents active on multidrug-resistant cell lines. Synthesis and biological evaluation.
abstract: We have earlier postulated that the presence of a pyridazone ring fused with an anthracenedione moiety resulted in the analog's ability to overcome multidrug resistance of tumor cells [J. Med. Chem.1999, 42, 3494]. High cytotoxic activity of obtained anthrapyridazones [Bioorg. Med. Chem.2003, 11, 561] toward the resistant cell lines, prompted us to synthesize the similarly modified acridine compounds. A series of pyridazinoacridin-3-one derivatives (2b-h) were prepared from the reaction of 9-oxo-9,10-dihydroacridine-1-carboxylate with POCl(3), followed by addition of the appropriate (alkylamino)alkylhydrazines. In vitro cytotoxic activity toward sensitive and resistant leukemia cell lines: L1210, K562, K562/DX, HL-60, HL-60/VINC, and HL-60/DX, with various type of multidrug resistance (MDR and MRP) was determined. The compounds studied exhibited in comparison to the reference cytostatics (DX, MIT) desirable very low resistance indexes (RI). Variations have been observed depending upon the substituent and the type of drug exporting pump. The cytotoxic activities of examined compounds, as well as of model anthrapyridazone derivative PDZ, were lower than those of reference drugs (DX, MIT) due to their diminished affinity to DNA.
authors.affiliation: Department of Pharmaceutical Technology and Biochemistry, Gdańsk University of Technology, 80-952 Gdańsk, Poland.
authors.forename: Barbara
authors.initials: B
authors.lastname: Stefańska
authors.forename: Maria M
authors.initials: MM
authors.lastname: Bontemps-Gracz
authors.forename: Ippolito
authors.initials: I
authors.lastname: Antonini
authors.forename: Sante
authors.initials: S
authors.lastname: Martelli
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Arciemiuk
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Piwkowska
authors.forename: Dorota
authors.initials: D
authors.lastname: Rogacka
authors.forename: Edward
authors.initials: E
authors.lastname: Borowski
mesh_terms: D000166:Acridines / Q000138:chemical synthesis* / Q000737:chemistry / Q000633:toxicity*; D000818:Animals; D045744:Cell Line, Tumor; D019008:Drug Resistance, Neoplasm / Q000187:drug effects*; D006801:Humans; D020128:Inhibitory Concentration 50; D051379:Mice; D015394:Molecular Structure
chemical_list: C502391:2,7-dihydro-3H-pyridazino(5,4,3-kl)acridin-3-one; D000166:Acridines