title: Combined delivery of temozolomide and the thymidine kinase gene for treatment of glioblastoma.
abstract: Glioblastoma is the most malignant form of brain tumor. In this study, combination therapy with temozolomide (TMZ) and the herpes simplex virus thymidine kinase (HSVtk) gene was evaluated in glioblastoma models. The R7L10 peptide was used as a carrier of TMZ and the HSVtk gene. TMZ was loaded into R7L10 micelles using the oil-in-water emulsion/solvent evaporation method. The TMZ-loaded R7L10 (R7L10-TMZ) micelles formed a complex with the HSVtk gene, pHSVtk. The formation of the R7L10-TMZ/pHSVtk complex was confirmed by gel retardation and heparin competition assays. An in vitro transfection assay demonstrated that the transfection efficiency of R7L10-TMZ was similar to that of R7L10 in C6 glioblastoma cells. R7L10-TMZ had greater anti-tumor effects than TMZ alone in C6 cells in vitro, suggesting that R7L10 is an efficient carrier of TMZ. The in vivo efficacy of the R7L10-TMZ/pHSVtk complex was evaluated in the intracranial glioblastoma model. HSVtk expression in tumors was confirmed by immunohistochemistry. Furthermore, a greater anti-tumor effect was observed in the R7L10-TMZ/pHSVtk group compared with the TMZ or R7L10/pHSVtk single injection group. In conclusion, combined delivery of TMZ and the HSVtk gene using R7L10 peptides may be useful for the treatment of glioblastoma.
authors.affiliation: a Department of Bioengineering, College of Engineering , Hanyang University , Seongdong-Gu , Seoul , Korea.
authors.forename: Eunji
authors.initials: E
authors.lastname: Choi
authors.affiliation: a Department of Bioengineering, College of Engineering , Hanyang University , Seongdong-Gu , Seoul , Korea.
authors.forename: Jaesik
authors.initials: J
authors.lastname: Han
authors.affiliation: a Department of Bioengineering, College of Engineering , Hanyang University , Seongdong-Gu , Seoul , Korea.
authors.forename: Xiaonan
authors.initials: X
authors.lastname: Tan
authors.affiliation: a Department of Bioengineering, College of Engineering , Hanyang University , Seongdong-Gu , Seoul , Korea.
authors.forename: Jungju
authors.initials: J
authors.lastname: Oh
authors.affiliation: a Department of Bioengineering, College of Engineering , Hanyang University , Seongdong-Gu , Seoul , Korea.
authors.forename: Dahee
authors.initials: D
authors.lastname: Lee
authors.affiliation: a Department of Bioengineering, College of Engineering , Hanyang University , Seongdong-Gu , Seoul , Korea.
authors.forename: Taiyoun
authors.initials: T
authors.lastname: Rhim
authors.affiliation: a Department of Bioengineering, College of Engineering , Hanyang University , Seongdong-Gu , Seoul , Korea.
authors.forename: Minhyung
authors.initials: M
authors.lastname: Lee
mesh_terms: D000818:Animals; D018906:Antineoplastic Agents, Alkylating / Q000737:chemistry / Q000493:pharmacokinetics* / Q000494:pharmacology*; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D003131:Combined Modality Therapy / Q000379:methods; D003606:Dacarbazine / Q000031:analogs & derivatives* / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology; D018014:Gene Transfer Techniques; D015316:Genetic Therapy; D005909:Glioblastoma / Q000188:drug therapy*; D051381:Rats; D000077204:Temozolomide; D013937:Thymidine Kinase / Q000235:genetics / Q000378:metabolism*
chemical_list: D018906:Antineoplastic Agents, Alkylating; D003606:Dacarbazine; D013937:Thymidine Kinase; D000077204:Temozolomide
keywords: Gene therapy; drug delivery; glioblastoma; micelle; peptide