In vivo preclinical low-field MRI monitoring of tumor growth following a suicide-gene therapy in an orthotopic mice model of human glioblastoma
| Autor: | Nathalie Accart, Philippe Choquet, Philippe Erbs, Gaëlle Aubertin, Bernard Grellier, Ronald Rooke, A. Constantinesco, Jacqueline Kintz, Elodie Breton, Christian Goetz |
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| Rok vydání: | 2009 |
| Předmět: |
Pathology
medicine.medical_specialty Antimetabolites Antineoplastic Genetic enhancement Genetic Vectors Flucytosine Mice Nude Vaccinia virus Saccharomyces cerevisiae General Biochemistry Genetics and Molecular Biology Cytosine Deaminase Mice In vivo Glioma medicine Animals Humans Prodrugs Biotransformation General Immunology and Microbiology medicine.diagnostic_test business.industry Brain Neoplasms Genes Transgenic Suicide Cancer Magnetic resonance imaging General Medicine Genetic Therapy Suicide gene medicine.disease Magnetic Resonance Imaging Xenograft Model Antitumor Assays Tumor Burden Immunology Stereotactic injection Female General Agricultural and Biological Sciences business Glioblastoma Preclinical imaging |
| Zdroj: | Comptes rendus biologies. 333(3) |
| ISSN: | 1768-3238 |
| Popis: | The aim of this study was to monitor in vivo with low field MRI growth of a murine orthotopic glioma model following a suicide gene therapy.The gene therapy consisted in the stereotactic injection in the mice brain of a modified vaccinia virus Ankara (MVA) vector encoding for a suicide gene (FCU1) that transforms a non toxic prodrug 5-fluorocytosine (5-FC) to its highly cytotoxic derivatives 5-fluorouracil (5-FU) and 5'-fluorouridine-5'monophosphate (5'-FUMP). Using a warmed-up imaging cell, sequential 3D T1 and T2 0.1T MRI brain examinations were performed on 16 Swiss female nu/nu mice bearing orthotopic human glioblastoma (U87-MG cells). The 6-week in vivo MRI follow-up consisted in a weekly measurement of the intracerebral tumor volume leading to a total of 65 examinations. Mice were divided in four groups: sham group (n=4), sham group treated with 5-FC only (n=4), sham group with injection of MVA-FCU1 vector only (n=4), therapy group administered with MVA-FCU1 vector and 5-FC (n=4). Measurements of tumor volumes were obtained after manual segmentation of T1- and T2-weighted images.Intra-observer and inter-observer tumor volume measurements show no significant differences. No differences were found between T1 and T2 volume tumor doubling times between the three sham groups. A significant statistical difference (p0.05) in T1 and T2 volume tumor doubling times between the three sham groups and the animals treated with the intratumoral injection of MVA-FCU1 vector in combination with 2 weeks per os 5-FC administration was demonstrated.Preclinical low field MRI was able to monitor efficacy of suicide gene therapy in delaying the tumor growth in an in vivo mouse model of orthotopic glioblastoma. |
| Databáze: | OpenAIRE |
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