title: In vitro synergistic interaction between DTA0100 and radiation in human cancer cell lines.
abstract: DTA0100 is a new catalytic inhibitor of the human DNA topoisomerase IIα that induces G2/M phase cell cycle arrest in human solid tumor cells lines from various malignancies. In our study, we investigated the effectiveness of the combined treatment of ionizing radiation with DTA0100 on the survival of three representative human solid tumor cell lines: HeLa (cervix), WiDr (colon) and SW1573 (non-small cell lung cancer). The concomitant treatment of DTA0100 and irradiation showed a synergistic and antagonistic effect in the three cell lines tested. A synergistic cytotoxic effect of the combination of DTA0100 and radiation was confirmed by the median drug effect analysis method. It was found that in those protocols where the drug was administered after radiation the most synergistic effect was achieved. Our study constitutes the first in vitro evidence for synergistic effects between DTA0100 and radiation. This combination therapy might thus be expected to be more effective than either treatment alone in patients with cervical, colon and non-small cell lung cancer cells.
authors.affiliation: BioLab, Instituto Universitario de Bio-Organica Antonio Gonzalez, Universidad de La Laguna, C/ Astrofisico Francisco Sanchez 2, 38206 La Laguna, Spain.
authors.forename: Elisa
authors.initials: E
authors.lastname: Bordon
authors.forename: Leticia G
authors.initials: LG
authors.lastname: Leon
authors.forename: Carla
authors.initials: C
authors.lastname: Rios-Luci
authors.forename: Pedro C
authors.initials: PC
authors.lastname: Lara
authors.forename: Jose M
authors.initials: JM
authors.lastname: Padron
mesh_terms: D000179:Acrylates / Q000737:chemistry / Q000494:pharmacology*; D000970:Antineoplastic Agents / Q000737:chemistry / Q000494:pharmacology*; D002210:Caprylates / Q000737:chemistry / Q000494:pharmacology*; D049109:Cell Proliferation / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004354:Drug Screening Assays, Antitumor; D006367:HeLa Cells; D006801:Humans; D013329:Structure-Activity Relationship; D014407:Tumor Cells, Cultured; D014466:Ultraviolet Rays
chemical_list: D000179:Acrylates; D000970:Antineoplastic Agents; D002210:Caprylates; C585823:DTA0100