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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.
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 µg/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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