title: Magnetic resonance imaging of mouse Ehrlich carcinoma growth inhibition by thiacarpine, an analogue of cytotoxic marine alkaloid polycarpine.
abstract: The anticancer effect of thiacarpine, a synthetic analogue of the known cytotoxic alkaloid polycarpine isolated from the Pacific ascidian Polycarpa aurata, was investigated in vivo in experiments using mouse solid Ehrlich carcinoma tumor as the target. A high-resolution magnetic resonance imaging (MRI) technique using a MR tomograph "PharmaScan" US70/16 (Bruker, Ettlingen, Germany) was used for visualization and quantification of tumor size. Fluorescence microscopy and image analysis were applied to determine Ehrlich carcinoma cell chromatin condensing (apoptosis) and necrosis in Ehrlich carcinoma cells at the action of thiacarpine in in vitro experiments. The scan and size calculations of the tumor and some mouse organs were carried out during the experiments. Thiacarpine in a total dose of 100 mg/kg was found to exhibit the delay in growth of the mouse tumor. The antineoplastic effect of this compound was accompanied by an increase in the lifetime of experimental mice in comparison with the control group of animals. Our data show that the ability of thiacarpine to induce apoptosis in carcinoma cells may contribute to thiacarpine anticancer effects against mice solid Ehrlich carcinoma in vivo detected by MRI.
authors.affiliation: Pacific Institute of Bioorganic Chemistry, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok, Russian Federation. agafonova@piboc.dvo.ru
authors.forename: Irina G
authors.initials: IG
authors.lastname: Agafonova
authors.forename: Oleg S
authors.initials: OS
authors.lastname: Radchenko
authors.forename: Vyacheslav L
authors.initials: VL
authors.lastname: Novikov
authors.forename: Dmitry L
authors.initials: DL
authors.lastname: Aminin
authors.forename: Valentin A
authors.initials: VA
authors.lastname: Stonik
mesh_terms: D000470:Alkaloids / Q000627:therapeutic use*; D000818:Animals; D000970:Antineoplastic Agents / Q000627:therapeutic use*; D017209:Apoptosis; D002286:Carcinoma, Ehrlich Tumor / Q000175:diagnosis* / Q000188:drug therapy / Q000473:pathology; D004305:Dose-Response Relationship, Drug; D005434:Flow Cytometry; D007093:Imidazoles / Q000627:therapeutic use*; D008279:Magnetic Resonance Imaging; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008856:Microscopy, Fluorescence; D009368:Neoplasm Transplantation; D014407:Tumor Cells, Cultured
chemical_list: D000470:Alkaloids; D000970:Antineoplastic Agents; D007093:Imidazoles; C533280:thiacarpine