title: Carrageenans inhibit growth-factor binding.
abstract: Carrageenans, a family of polysulphated carbohydrates, inhibited binding of basic fibroblast growth factor (bFGF), transforming growth factor beta 1 (TGF beta 1) and platelet-derived growth factor (PDGF). iota-Carrageenan was the most potent bFGF antagonist (IC50 = 0.4 +/- 0.1 microgram/ml), kappa-carrageenan was the most potent PDGF antagonist (IC50 = 1.7 +/- 1.3 micrograms/ml) and lambda-carrageenan was the most potent TGF beta 1 antagonist (IC50 = 19 +/- 2 micrograms/ml). None of the carrageenans, at concentrations up to 200 micrograms/ml, inhibited binding of insulin-like growth factor 1 or transforming growth factor alpha. Carrageenans are selective growth-factor antagonists and have potential for the treatment of disorders associated with the over-production of certain growth factors.
authors.affiliation: Clinical Oncology and Radiotherapeutics Unit, MRC Centre, Cambridge, U.K.
authors.forename: R
authors.initials: R
authors.lastname: Hoffman
mesh_terms: D016475:3T3 Cells; D000818:Animals; D002351:Carrageenan / Q000494:pharmacology*; D002460:Cell Line; D016222:Fibroblast Growth Factor 2 / Q000037:antagonists & inhibitors / Q000378:metabolism; D006133:Growth Substances / Q000378:metabolism*; D006801:Humans; D007334:Insulin-Like Growth Factor I / Q000037:antagonists & inhibitors / Q000378:metabolism; D007700:Kinetics; D051379:Mice; D010982:Platelet-Derived Growth Factor / Q000037:antagonists & inhibitors / Q000378:metabolism; D016211:Transforming Growth Factor alpha / Q000037:antagonists & inhibitors / Q000378:metabolism; D016212:Transforming Growth Factor beta / Q000037:antagonists & inhibitors / Q000378:metabolism; D014407:Tumor Cells, Cultured
chemical_list: D006133:Growth Substances; D010982:Platelet-Derived Growth Factor; D016211:Transforming Growth Factor alpha; D016212:Transforming Growth Factor beta; D016222:Fibroblast Growth Factor 2; D007334:Insulin-Like Growth Factor I; D002351:Carrageenan