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Type: Journal article
Title: Attenuation of leakiness in doxycycline-inducible expression via incorporation of 3 ' AU-rich mRNA destabilizing elements
Author: Pham, D.
Moretti, P.
Goodall, G.
Pitson, S.
Citation: Biotechniques, 2008; 45(2):155-162
Publisher: Eaton Publishing Co
Issue Date: 2008
ISSN: 0736-6205
Statement of
Duyen H. Pham, Paul A.B. Moretti, Gregory J. Goodall and Stuart M. Pitson
Abstract: Tetracycline-regulated expression systems have been widely used for inducible protein expression in cultured mammalian cells. With these systems, however, leakiness in expression of the target gene in the absence of the inducing agent is a frequent problem. Here we describe a novel approach to overcome this problem that involves the incorporation of AU-rich mRNA destabilizing elements (AREs) into the 3′ untranslated regions of the tetracycline-inducible constructs. Using the inducible expression of sphingosine kinase 1 and 2 in HEK293 cells as model systems, we found this ARE approach to be remarkably successful in ablating expression of these proteins in the absence of doxycycline through decreasing stability of their mRNAs. We show that this undemanding and flexible process results in a substantial decrease in the leakiness of the tetracycline-inducible expression system while maintaining a high level of target protein expression following induction.
Keywords: Cells, Cultured; Humans; Doxycycline; Phosphotransferases (Alcohol Group Acceptor); RNA, Messenger; 3' Untranslated Regions; Gene Expression Regulation; Base Sequence; RNA Stability; Molecular Sequence Data
Description: © 2008 BioTechniques
RMID: 0020084442
DOI: 10.2144/000112896
Appears in Collections:Molecular and Biomedical Science publications

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