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Title

Using multiplexed regulation of luciferase activity and GFP translocation to screen for FOXO modulators

AuthorsZanella, Fabian; Rosado, Aránzazu ; García, Beatriz; Carnero, Amancio ; Link, Wolfgang
KeywordsBase sequence
Cell line
Forkhead transcription factors
Green fluorescent proteins
Luciferases
Plasmids
Recombinant fusion proteins
Signal transduction
Transfection
Issue Date25-Feb-2009
PublisherBioMed Central
CitationBMC Cell Biology 10(14): (2009)
AbstractBACGROUND: Independent luciferase reporter assays and fluorescent translocation assays have been successfully used in drug discovery for several molecular targets. We developed U2transLUC, an assay system in which luciferase and fluorescent read-outs can be multiplexed to provide a powerful cell-based high content screening method. RESULTS: The U2transLUC system is based on a stable cell line expressing a GFP-tagged FOXO transcription factor and a luciferase reporter gene under the control of human FOXO-responsive enhancers. The U2transLUC assay measures nuclear-cytoplasmic FOXO shuttling and FOXO-driven transcription, providing a means to analyze these two key features of FOXO regulation in the same experiment. We challenged the U2transLUC system with chemical probes with known biological activities and we were able to identify compounds with translocation and/or transactivation capacity. CONCLUSION: Combining different biological read-outs in a single cell line offers significant advantages over conventional cell-based assays. The U2transLUC assay facilitates the maintenance and monitoring of homogeneous FOXO transcription factor expression and allows the reporter gene activity measured to be normalized with respect to cell viability. U2transLUC is suitable for high throughput screening and can identify small molecules that interfere with FOXO signaling at different levels.
Description10 páginas, 4 figuras.
Publisher version (URL)http://dx.doi.org/10.1186/1471-2121-10-14
URIhttp://hdl.handle.net/10261/38791
DOI10.1186/1471-2121-10-14
ISSN1471-2121
Appears in Collections:(IBIS) Artículos
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