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KMID : 0578319970070040514
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Molecules and Cells
1997 Volume.7 No. 4 p.514 ~ p.520
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Tetracycline-mediated Suppression of Gene Expression with a New dicistronic Retroviral Vector
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Kim, sun Jung
Sadelain, Michel/Choi, Kyung Hee/Kim, Hae Kwon/Lee, Jung soon/Chung, Hee Yong
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Abstract
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Since the first description of the helper-free retrovirus vector by Mann et al. (1983), many improvements have been introduced to the systemn to increae 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 inserted gene(s) in target cells. Although constitutive expression of the deliveder gene(s) in target cells may be sufficient for some purposes, controlled expression of gene(s) in target cells or tissues would be faborable 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 retrovirla vectors will be useful in regulating the expression of the genes delivered in vivo.
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KEYWORD
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