title: An antiproliferative salicylaldoximato type copper(II) chelate as an enhancer of the cytotoxicity of murine spleen cells to tumor cells in vitro.
abstract: The antiproliferative metal chelate bis(2,3,4-trihydroxybenzaldoxyimato)copper(II) (CuTRI2) was shown to distinctly enhance the cytotoxicity of the spleen effector cells of CBA/CA mice to YAC-1 tumor cells in vitro as measured using a 4-h 51Cr release test. The compound was either added directly to the assay system or the effectors were incubated in the presence of it for 2 h and washed before assay. The concentrations tested were 10, 20 and 40 mg/ml, the lowest concentration leading invariably to the strongest enhancement of cytotoxicity. The effector cells involved were very probably natural killer cells. The highest concentration had, if anything, a negative effect on the release of 51Cr from the target cells. In the same concentrations, CuTRI2 did not enhance the cytotoxicity of the spleen effector cells to K-562 tumor cells. Preliminary studies on the related chelate trans-bis(2,4-dihydroxybenzaldoximato)copper(II) are also reported. This paper is apparently the first report of a copper chelate that enhances the cytotoxicity of any sort of effector cells to tumor cells.
mesh_terms: D000818:Animals; D002455:Cell Division / Q000187:drug effects*; D002478:Cells, Cultured; D002614:Chelating Agents / Q000494:pharmacology*; D002860:Chromium Radioisotopes; D003601:Cytotoxicity Tests, Immunologic; D003602:Cytotoxicity, Immunologic / Q000187:drug effects*; D006801:Humans; D007694:Killer Cells, Natural / Q000187:drug effects / Q000276:immunology; D051379:Mice; D009942:Organometallic Compounds / Q000494:pharmacology*
chemical_list: D002614:Chelating Agents; D002860:Chromium Radioisotopes; D009942:Organometallic Compounds; C053718:bis(2,3,4-trihydroxybenzaldoxyimato)copper(II); C053202:bis(resorcylaldoximato)copper(II)