Published online 10 August 2004
Nucleic Acids Research, Vol. 32 No. 14 © Oxford University Press 2004; all rights reserved
Induction and characterization of taxol-resistance phenotypes with a transiently expressed artificial transcriptional activator library
ToolGen, Inc. Daedeok Biocommunity, 461-71, Jeonmin-dong, Yuseong-gu, Daejeon, 305-390, South Korea
* To whom correspondence should be addressed. Tel: +82 42 863 8166; Fax: +82 42 863 3840; Email: wseol{at}toolgen.com
Present address: Dong-ki Lee, Department of Chemistry, Pohang University of Science and Technology, Pohang, 790-784, South Korea
The authors wish it to be known that, in their opinion, the first two authors should be regarded as joint First Authors
Received June 4, 2004; Revised and Accepted July 27, 2004
Phenotype-based functional genomic methods are useful for the identification of genes that are related to a particular biological function or disease. Essential to this approach is the ability to regulate the expression of selected genes. Artificial transcription factors (ATFs) are key molecular tools that selectively regulate gene expression in vivo. Here, we use an ATF library to identify genes that participate in rendering a cell resistant to the drug Taxol, a potent anti-cancer drug that binds to tubulin and inhibits cell division. The library, which encodes ATFs that activate (rather than inhibit) transcription, was introduced into a HeLa cell line, and Taxol-resistant cells were selected. After eight rounds of selection, we identified two ATFs that significantly increased the level of Taxol resistance (TR) in HeLa cells. Gene expression microarray experiments using these ATFs identified 37 co-regulated genes, including genes already known to participate in TR. This study demonstrates that ATF libraries can be used to induce phenotypic alterations in eukaryotic cells and then identify specific genes that are associated with the phenotype of choice.
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