title: Tetracycline-mediated suppression of gene expression with a new dicistronic retroviral vector.
abstract: Since the first description of the helper-free retrovirus vector by Mann et al. (1983), many improvements have been introduced to the system to increase titer, or to achieve better expression of the transduced genes in cells of different lineage. The typical form of recombinant retrovirus vector utilizes its 5' long terminal repeat (LTR) as a promoter unit for the transcription of the inserted gene(s), which allows only the constitutive expression of the inserted gene(s) in target cells. Although constitutive expression of the delivered gene(s) in target cells may be sufficient for some purposes, controlled expression of gene(s) in target cells or tissues would be favorable in many basic and clinical applications. To circumvent these problems, we developed a new retroviral vector that allows controlled expression of the inserted genes. With these new retroviral vectors, the expression level of the inserted genes can be controlled up to 200-fold in the presence of a minimum amount of tetracycline. We think these new retroviral vectors will be useful in regulating the expression of the genes delivered in vivo.
authors.affiliation: Laboratory of Tumor Immunology, Korea Cancer Center Hospital, Seoul.
authors.forename: S J
authors.initials: SJ
authors.lastname: Kim
authors.forename: M
authors.initials: M
authors.lastname: Sadelain
authors.forename: K H
authors.initials: KH
authors.lastname: Choi
authors.forename: H K
authors.initials: HK
authors.lastname: Kim
authors.forename: J S
authors.initials: JS
authors.lastname: Lee
authors.forename: H Y
authors.initials: HY
authors.lastname: Chung
mesh_terms: D016475:3T3 Cells; D000818:Animals; D004686:Encephalomyocarditis virus / Q000235:genetics; D005786:Gene Expression Regulation / Q000187:drug effects*; D005814:Genes, Viral; D005822:Genetic Vectors / Q000138:chemical synthesis / Q000378:metabolism / Q000494:pharmacology*; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000096:biosynthesis / Q000187:drug effects / Q000235:genetics; D007951:Leukemia, Myeloid; D051379:Mice; D012190:Retroviridae / Q000235:genetics* / Q000502:physiology; D013752:Tetracycline / Q000494:pharmacology*; D014162:Transfection; D014407:Tumor Cells, Cultured; D015678:Viral Structural Proteins / Q000235:genetics; D014771:Virion / Q000502:physiology; D014779:Virus Replication
chemical_list: D015678:Viral Structural Proteins; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D013752:Tetracycline