title: Synthesis of variously substituted 3-phenoxymethyl quinoxalin-2-ones and quinoxalines capable to potentiate in vitro the antiproliferative activity of anticancer drugs in multi-drug resistant cell lines.
abstract: Two series of 1,6-dimethyl-3-phenoxymethylquinoxalin-2-ones and 1-benzyl-3-phenoxymethyl-7-trifluoromethylquinoxalin-2-ones, and a series of 2-benzyloxy-3-phenoxymethyl-7-trifluoromethylquinoxaline were synthesized. Their capability to restore/potentiate the antiproliferative activity of clinically useful drugs, such as doxorubicin (Doxo), vincristine (VCR) and etoposide (VP16), in drug-resistant human nasopharyngeal carcinoma KB cells (KB(WT), KB(MDR), KB(7D)and KB(V20C)) was evaluated. In vitro data show that many quinoxalin-2-ones and quinoxalines potentiate the antiproliferative activity of Doxo and VCR in tumor-derived MDR cell lines. In this series, 17a turned out to be the most potent quinoxaline derivative in potentiating the antiproliferative activity of doxorubicin and vincristine against KB(MDR) and KB(V20C) resistant cell lines, respectively.
authors.affiliation: Dipartimento Farmaco Chimico Tossicologico, via Muroni 23/a, 07100 Sassari-Italy. acarta@uniss.it
authors.forename: Antonio
authors.initials: A
authors.lastname: Carta
authors.forename: Mario
authors.initials: M
authors.lastname: Loriga
authors.forename: Sandra
authors.initials: S
authors.lastname: Piras
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Paglietti
authors.forename: Paolo
authors.initials: P
authors.lastname: La Colla
authors.forename: Bernardetta
authors.initials: B
authors.lastname: Busonera
authors.forename: Gabriella
authors.initials: G
authors.lastname: Collu
authors.forename: Roberta
authors.initials: R
authors.lastname: Loddo
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000037:antagonists & inhibitors / Q000378:metabolism; D000970:Antineoplastic Agents / Q000494:pharmacology*; D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects*; D004317:Doxorubicin / Q000494:pharmacology; D018432:Drug Resistance, Multiple; D004357:Drug Synergism; D005047:Etoposide / Q000494:pharmacology; D006801:Humans; D007624:KB Cells; D009369:Neoplasms / Q000473:pathology; D011810:Quinoxalines / Q000138:chemical synthesis* / Q000494:pharmacology*; D014407:Tumor Cells, Cultured; D014750:Vincristine / Q000494:pharmacology
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000970:Antineoplastic Agents; D011810:Quinoxalines; D014750:Vincristine; D005047:Etoposide; D004317:Doxorubicin