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Nucleic Acids Research 2004 32(11):e89; doi:10.1093/nar/gnh086
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Published online 24 June 2004

Nucleic Acids Research, Vol. 32 No. 11 © Oxford University Press 2004; all rights reserved

A GFP-based assay for rapid screening of compounds affecting ARE-dependent mRNA turnover

Don Benjamin, Marco Colombi and Christoph Moroni*

Institute for Medical Microbiology, Petersplatz 10, 4003 Basel, Switzerland

* To whom correspondence author should be addressed. Tel: +41 61 267 3265; Fax: +41 61 267 3283; Email: Christoph.Moroni{at}unibas.ch

Received March 12, 2004; Revised and Accepted June 1, 2004

A reporter transcript containing the green fluorescent protein (GFP) gene upstream of the destabilizing 3'-untranslated region (3'-UTR) of the murine IL-3 gene was inserted in mouse PB-3c-15 mast cells. The GFP–IL-3 transcript was inherently unstable due to the presence of an adenosine–uridine (AU)-rich element (ARE) in the 3'-UTR and was subject to rapid decay giving a low baseline of GFP fluorescence. Transcript stabilization with ionomycin resulted in an increase of fluorescence that is quantitated by FACS analysis of responding cells. Using this system we have identified okadaic acid as a novel stabilizing compound, and investigated the upstream signaling pathways leading to stabilization. This reporter system has the advantage of speed and simplicity over standard methods currently in use and in addition to serving as a research tool it can be easily automated to increase throughput for drug discovery.


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D. Benjamin, M. Schmidlin, L. Min, B. Gross, and C. Moroni
BRF1 Protein Turnover and mRNA Decay Activity Are Regulated by Protein Kinase B at the Same Phosphorylation Sites
Mol. Cell. Biol., December 15, 2006; 26(24): 9497 - 9507.
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