title: Comparative study of isoflavone, quinoxaline and oxindole families of anti-angiogenic agents.
abstract: A study designed to compare the effects on VEGF-induced angiogenesis of a number of known anti-angiogenic agents together with some novel derivatives thereof was undertaken. Thus the isoflavone biochanin A 1[structure: see text], indomethacin 2[structure: see text], the 3-arylquinoxaline SU1433 and its derivatives 3-6[structure: see text], the benzoic acid derivative 7[structure: see text], the oxindoles SU5416 8[structure: see text] and SU6668 11[structure: see text], together with their simple N-benzyl derivatives 9, 10, and 12[structure: see text] were selected for study. Using an in vitro assay the compounds were evaluated for their ability to inhibit VEGF-induced angiogenesis in HUVECs, and the cytotoxicity of representative compounds was also studied in tumour cell lines using 24-h exposure. The results indicate that the SU compounds, SU1433, SU 5416 and SU6668, are more potent inhibitors of VEGF-induced angiogenesis than indomethacin or the naturally occurring biochanin A, presumably because they inhibit VEGF receptor signalling. Blocking one of the phenolic OH groups of SU1433 reduced anti-angiogenic activity, as did blocking the NH groups of SU5416 and SU6668. Cytotoxicity studies indicate that none of the compounds examined exhibited cytotoxicity at anti-angiogenic concentrations.
authors.affiliation: School of Sport and Health Sciences, University of Exeter, Exeter, UK.
authors.forename: Jacqueline L
authors.initials: JL
authors.lastname: Whatmore
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Swann
authors.forename: Paola
authors.initials: P
authors.lastname: Barraja
authors.forename: Jeffery J
authors.initials: JJ
authors.lastname: Newsome
authors.forename: Melisa
authors.initials: M
authors.lastname: Bunderson
authors.forename: Howard D
authors.initials: HD
authors.lastname: Beall
authors.forename: John E
authors.initials: JE
authors.lastname: Tooke
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Moody
mesh_terms: D020533:Angiogenesis Inhibitors / Q000494:pharmacology*; D004730:Endothelium, Vascular / Q000187:drug effects; D006801:Humans; D007211:Indoles / Q000494:pharmacology*; D007529:Isoflavones / Q000494:pharmacology*; D009369:Neoplasms / Q000098:blood supply / Q000188:drug therapy; D009389:Neovascularization, Pathologic / Q000188:drug therapy*; D000078183:Oxindoles; D011422:Propionates; D011758:Pyrroles / Q000494:pharmacology*; D011810:Quinoxalines / Q000494:pharmacology*
chemical_list: D020533:Angiogenesis Inhibitors; D007211:Indoles; D007529:Isoflavones; D000078183:Oxindoles; D011422:Propionates; D011758:Pyrroles; D011810:Quinoxalines; C116890:Semaxinib; C412603:orantinib