title: A gene delivery system with a human artificial chromosome vector based on migration of mesenchymal stem cells towards human glioblastoma HTB14 cells.
abstract: Mesenchymal stem cells (MSCs) have been expected to become useful gene delivery vehicles against human malignant gliomas when coupled with an appropriate vector system, because they migrate towards the lesion. Human artificial chromosomes (HACs) are non-integrating vectors with several advantages for gene therapy, namely, no limitations on the size and number of genes that can be inserted. We investigated the migration of human immortalized MSCs bearing a HAC vector containing the herpes simplex virus thymidine kinase gene (HAC-tk-hiMSCs) towards malignant gliomas in vivo. Red fluorescence protein-labeled human glioblastoma HTB14 cells were implanted into a subcortical region in nude mice. Four days later, green fluorescence protein-labeled HAC-tk-hiMSCs were injected into a contralateral subcortical region (the HTB14/HAC-tk-hiMSC injection model). Tropism to the glioma mass and the route of migration were visualized by fluorescence microscopy and immunohistochemical staining. HAC-tk-hiMSCs began to migrate toward the HTB14 glioma area via the corpus callosum on day 4, and gathered around the HTB14 glioma mass on day 7. To test whether the delivered gene could effectively treat glioblastoma in vivo, HTB14/HAC-tk-hiMSC injected mice were treated with ganciclovir (GCV) or PBS. The HTB14 glioma mass was significantly reduced by GCV treatment in mice injected with HAC-tk-hiMSCs. It was confirmed that gene delivery by our HAC-hiMSC system was effective after migration of MSCs to the glioma mass in vivo. Therefore, MSCs containing HACs carrying an anticancer gene or genes may provide a new tool for the treatment of malignant gliomas and possibly of other tumor types.
authors: Department of Neurosurgery, Faculty of Medicine, Tottori University, Tottori, Japan. yuusuke.kinoshita@hospital.tottori.tottori.jp
authors: Yusuke
authors: Y
authors: Kinoshita
authors: Hideki
authors: H
authors: Kamitani
authors: Mahabub Hasan
authors: MH
authors: Mamun
authors: Brian
authors: B
authors: Wasita
authors: Yasuhiro
authors: Y
authors: Kazuki
authors: Masaharu
authors: M
authors: Hiratsuka
authors: Mitsuo
authors: M
authors: Oshimura
authors: Takashi
authors: T
authors: Watanabe
mesh_terms: D000818:Animals; D001932:Brain Neoplasms / Q000235:genetics / Q000503:physiopathology / Q000601:surgery*; D002461:Cell Line, Transformed; D002465:Cell Movement / Q000502:physiology*; D022222:Chromosomes, Artificial, Human / Q000235:genetics*; D018014:Gene Transfer Techniques; D015316:Genetic Therapy / Q000379:methods; D005822:Genetic Vectors / Q000235:genetics / Q000494:pharmacology* / Q000627:therapeutic use; D005909:Glioblastoma / Q000235:genetics / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D008297:Male; D045164:Mesenchymal Stem Cell Transplantation / Q000379:methods*; D059630:Mesenchymal Stem Cells / Q000502:physiology*; D051379:Mice; D008819:Mice, Nude; D018139:Simplexvirus / Q000235:genetics; D013937:Thymidine Kinase / Q000235:genetics; D014183:Transplantation, Heterologous; D016896:Treatment Outcome
chemical_list: D013937:Thymidine Kinase