Overview

Monitor signal transduction in real time with our re-engineered pGreenFire 2.0 Lentivectors

SBI has upgraded our popular pGreenFire signaling pathway reporter lentivectors with a design that leads to more reliable generation of stable cell lines. We’ve also swapped in the red firefly luciferase reporter (rFLuc), which opens up the possibility of performing a dual-spectral luciferase assay and delivers greater sensitivity for in vivo applications than conventional luciferase.

With the pGreenFire 2.0 Estrogen Response Element Reporter Lentivector & Virus (pGF2-ERE-rFluc-T2A-GFP-mPGK-Puro), the core reporter functionality is similar to the original pGreenFire lentivector—estrogen-responsive transcriptional response elements (TREs) are placed upstream of a minimal CMV promoter (mCMV) which together drive co-expression of rFLuc and GFP in response to estrogen. The result is the ability to quantitatively measure estrogen signaling pathway activity using both fluorescence and luciferase activity.

What makes our next-gen pGreenFire 2.0 vectors even better than other TRE reporter vectors is the smart design, which adds in a constitutive selection cassette for stable cell line generation while minimizing interference with the upstream TRE. By using a weak/moderate mPGK promoter to drive the antibiotic selection marker (puromycin resistance) and carefully arranging the conditional reporter genes, the selection marker is reliably expressed without compromising conditional expression of rFLuc and GFP.

As with our original pGreenFire1 vectors, all pGreenFire 2.0 lentivectors leverage our reliable lentivector technology and save you time with pre-built signal transduction pathway reporters that come as ready-to-transduce pre-packaged lentivirus and plasmid that can be transfected into the lentivirus producing system of your choice*.

• Sort responsive cells with GFP
• Measure activity with red firefly luciferase
• Leverage SBI’s highly-regarded lentivectors
• Create stable signaling pathway reporter cell lines
• Introduce reporters into difficult-to-transfect cell types, including primary and non-dividing mammalian cell lines

*Please note that these vectors only function properly when transduced. Transfection keeps the constitutive RSV promoter intact, leading to nonspecific expression of the reporter genes.

Supporting Data

See our pGreenFire 2.0 transcriptional response element reporters in action

Figure 1. The pGreenFire 2.0 Estrogen Response Element Reporter efficiently and quantitatively reports on estrogen signaling pathway activity in HeLa cells. Relative luciferase activity decreases in response to tamoxifen, an inhibitor of the estrogen signaling pathway.

Citations

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