title: Detection of fluorine labeled herceptin using cellular (19)F MRI ex vivo.
abstract: The aim of this study was to assess the herceptin efficacy in ex vivo cultures of MCF-7 breast carcinoma cells. Herceptin was used with perfluorooctyl bromide (PFOB) and conjugated with lipoplex, containing plasmid DNA and lipofectamine (LipA), to allow fluorine-19 magnetic resonance imaging ((19)F MRI) study. Treatments such as herceptin, herceptin/PFOB and herceptin/PFOB/lipoplex were used for ex vivo targeting of MCF-7 cells cultured in three-dimensional (3D) geometry using hollow fiber bioreactor (HFB) device. The viability of MCF-7 cells after 72h treatments decreased to 54+/-2%, 50+/-3% and 45+/-1% for herceptin, herceptin/PFOB and herceptin/PFOB/Lipoplex, respectively. The EC(50) values were 1000microg/ml, 930microg/ml and 730microg/ml, respectively. The significant correlation between the treatment concentration and efficacy was observed in MCF-7 cell cultures.
authors.affiliation: National Research Council Canada, Institute for Biodiagnostics (West), 3330 Hospital Drive NW, Calgary, Alberta T2N 4N1, Canada. dorota.bartusik@gmail.com
authors.forename: Dorota
authors.initials: D
authors.lastname: Bartusik
authors.forename: Boguslaw
authors.initials: B
authors.lastname: Tomanek
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology*; D000911:Antibodies, Monoclonal / Q000737:chemistry / Q000494:pharmacology*; D061067:Antibodies, Monoclonal, Humanized; D000970:Antineoplastic Agents / Q000737:chemistry / Q000494:pharmacology*; D019149:Bioreactors; D001943:Breast Neoplasms / Q000473:pathology*; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D002626:Chemistry, Pharmaceutical; D003287:Contrast Media; D004305:Dose-Response Relationship, Drug; D004655:Emulsions; D005260:Female; D005466:Fluorocarbons; D006801:Humans; D006842:Hydrocarbons, Brominated; D020128:Inhibitory Concentration 50; D008055:Lipids / Q000737:chemistry; D008279:Magnetic Resonance Imaging; D013997:Time Factors; D000068878:Trastuzumab
chemical_list: D000911:Antibodies, Monoclonal; D061067:Antibodies, Monoclonal, Humanized; D000970:Antineoplastic Agents; D003287:Contrast Media; D004655:Emulsions; D005466:Fluorocarbons; D006842:Hydrocarbons, Brominated; D008055:Lipids; C086724:Lipofectamine; D000068878:Trastuzumab; C003072:perflubron