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GRE Reporter

Cignal GRE Reporter (luc) Kit: CCS-006L
The GRE Reporter kit is designed to monitor the activity of glucocorticoid receptor-induced signal transduction pathways in cultured cells. The kit contains transfection-ready GRE reporter construct as well as positive and negative controls. The glucocortocoid steroids are potent anti-inflammatory agents and regulate or support a variety of important cardiovascular, metabolic, immunologic, and homeostatic functions. The biological actions of glucocortocoids are mediated by binding to specific glucocorticoid receptors (GRs). The GR-responsive luciferase construct encodes the firefly luciferase reporter gene under the control of a minimal (m)CMV promoter and tandem repeats of the glucocorticoid transcriptional response element (GRE). We have experimentally optimized the number of response elements as well as the intervening sequence between response elements to maximize the signal to noise ratio. Each reporter is premixed with constitutively expressing Renilla luciferase, which serves as an internal control for normalizing transfection efficiencies and monitoring cell viability.

Using a simple dual-luciferase assay, the GRE Reporter (luc) can easily and rapidly:

  • Monitor GR-mediated signaling pathway activity in cells
  • Study chemical compounds or drugs
  • Analyze phenotypes of RNAi or gene over expression

See the complete transcription factor reporter assay list.


Kit Components How It Works Manual & Resources Related products
10-Pathway Arrays
Component Specification Concentration (total volume)
GRE Reporter  A mixture of inducible GRE-responsive firefly luciferase construct and constitutively expressing Renilla luciferase construct (40:1).  (100 ng/µl; 500 µl)
Negative control  A mixture of non-inducible firefly luciferase construct and constitutively expressing Renilla luciferase construct (40:1).  (100 ng/µl; 500 µl)
Positive control  A mixture of constitutively expressing GFP, constitutively expressing firefly luciferase, and constitutively expressing Renilla luciferase constructs (40:1:1).  (100 ng/µl; 250 µl)

Kit Components How It Works Manual & Resources Related Products
  • Cignal Technology Overview

  • Brief Protocol

The Cignal Reporter Assays (luc) include pre-formulated, transfection-ready reporter, negative control, and positive control. The transcription factor reporter and negative control are transfected and subjected to experimental treatments, in parallel. Dual-luciferase results are calculated for each transfectant. The change in the activity of each signaling pathway is determined by comparing the normalized luciferase activities of the reporter in treated versus untreated transfectants. The identically treated negative control transfectants serve as a specificity control. The positive control serves as a control for transfection efficiency, by monitoring GFP expression, as well as a positive control for both the firefly and Renilla luciferase assays.

  • Performance Data

General performance

Average maximum response rate = 23.1
Average Z' factor at maximum response rate = 0.75
Average coefficient of variation (CV%) = 7.8%

Excellent signal to noise ratio

Cignal GRE reporter assay can measure upregulation of glucocorticoid receptor pathway activity: Hela cells were transfected with the GRE reporter, negative control and positive control (for transfection protocol refer our user manual) . After 16 hours of transfection, medium was changed to assay medium (Opti-MEM + 1% charcoal stripped FBS + 0.1mM NEAA + 1mM Sodium pyruvate + 100 U/ml penicillin + 100 g/ml streptomycin). After 24 hours of transfection and cells were treated with 100nM dexamethasone for 6 hours. Dual Luciferase assay was performed, and promoter activity values are expressed as arbitrary units using a Renilla reporter for internal normalization. Experiments were done in triplicates, and the standard deviation is indicated.

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Kit Components How It Works Manual & Resources Related Products
User Manuals Cignal Reporter Assay Kit User Manual (PDF)
White Paper Cignal Reporter Assay Kit: A High Performance Tool for Assessing the Functions of Genes, Biologics and Small Molecule Compounds (PDF)
Web Seminar Attend a live on-line seminar hosted by an Application Scientist about Cignal Reporters
Technical Brochure Cignal Reporter Assay Kits Technical Brochure (PDF)
Power Point Cignal™ Cell-Based Assays for Rapidly Analyzing Signaling Pathway Activity (PDF)
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Kit Components How It Works Manual & Resources Related Products
Pathway reporters Complete list of signaling pathway reporters
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10-Pathway Arrays Simultaneously measure the activities of ten (10) signaling pathways in a single experiment
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