title: Antiproliferative activity of synthetic tetrapeptides, analogs of AS-I phytotoxin, towards cancer cell lines.
abstract: The in vitro chemosensitivity of three cancer cell lines [HT29 (colon), HeLa (cervical) and T47D (breast)] to eight synthetic tetrapeptides, analogs of AS-I toxin, with phytotoxic effect on a series of plants was studied. Mouse fibroblast L929 cell line was also tested for chemosensitivity to these peptides. All cell lines were especially sensitive to Cys-Val-Gly-Glu tetrapeptide with IC50 values of 0.18, 0.3 and 0.63 mM for HT29, HeLa and T47D cells, respectively, whereas the IC50 value for the L929 cells was higher than 1 mM. Antiproliferative activity was also observed with peptides Tyr-Val-Gly-Glu and His-Val-Gly-Glu with IC50 values higher than those obtained for Cys-Val-Gly-Glu. For the rest of the peptides tested the IC50 values were found close to or higher than 3 mM.
authors.affiliation: Department of Chemical Engineering, Aristotle University, Thessaloniki, Greece.
authors.forename: M
authors.initials: M
authors.lastname: Liakopoulou-Kyriakides
authors.forename: G
authors.initials: G
authors.lastname: Stavropoulos
authors.forename: G
authors.initials: G
authors.lastname: Geromichalos
authors.forename: K T
authors.initials: KT
authors.lastname: Papazisis
authors.forename: A H
authors.initials: AH
authors.lastname: Kortsaris
authors.forename: D A
authors.initials: DA
authors.lastname: Kyriakidis
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000494:pharmacology*; D001943:Breast Neoplasms / Q000188:drug therapy*; D002455:Cell Division / Q000187:drug effects; D003110:Colonic Neoplasms / Q000188:drug therapy*; D005260:Female; D005347:Fibroblasts / Q000187:drug effects; D019073:HT29 Cells / Q000187:drug effects; D006367:HeLa Cells / Q000187:drug effects; D006801:Humans; D051379:Mice; D009842:Oligopeptides / Q000378:metabolism*; D010455:Peptides / Q000494:pharmacology; D014407:Tumor Cells, Cultured / Q000187:drug effects; D002583:Uterine Cervical Neoplasms / Q000188:drug therapy*
chemical_list: C111622:AS-I toxin; D000970:Antineoplastic Agents; D009842:Oligopeptides; D010455:Peptides