Luminescence Reporter Assays
Luminescence Reporter Assays - Related Videos
07:42
Rapid Analysis of Circadian Phenotypes in Arabidopsis Protoplasts Transfected with a Luminescent Clock Reporter
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Cited by 18 •
2016
The circadian clock regulates about a third of the Arabidopsis transcriptome, but the percentage of genes that feed back into timekeeping remains unknown. Here we visualize a method to rapidly assess circadian phenotypes in any mutant line of Arabidopsis using luminescent imaging of a circadian reporter transiently expressed in protoplasts.
02:36
The Luciferase Assay: A High-Throughput Assay to Measure Luminescent Signals Using Engineered Nanoluciferase System-Based Bioreporters
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2025
The video demonstrates the luciferase assay used to quantify luciferase-tagged proteins. The assay uses an engineered luciferase enzyme composed of a large fragment that binds with the small fragment, which is conjugated with a protein of interest. The bound subunits form an active enzyme that, in the presence of the substrate, releases a luminescent signal. This signal is then quantified using a luminometer.
04:00
Luminescence-Based Assay to Assess Neurotoxicity of Test Compounds on Neurons
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2025
In this video, we describe a luminescence-based method to assess the neurotoxicity of neurite outgrowth-promoting small molecule compounds on the viability of hNPC-derived neurons. The assay measures intracellular ATP level, an indicator of cell viability, to evaluate neurotoxicity following test compound treatment.
02:01
Assessing Pseudovirus Infection Using Luciferase Reporter Assay
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2026
Source: Chang, X., et al. Preparation of Pseudo-Typed H5 Avian Influenza Viruses with Calcium Phosphate Transfection Method and Measurement of Antibody Neutralizing Activity. J. Vis. Exp. (2021).This video demonstrates a luciferase-based assay to quantify pseudovirus infection in epithelial cells. The pseudovirus encodes the luciferase gene, which is expressed in infected cells. After washing, and cells are incubated with lysis buffer at an ultra-low temperature, and then thawed to induce lysis.
04:07
A Luciferase Reporter Assay to Study Translation Regulation in Poxvirus-Infected Cells
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2025
This video demonstrates an assay to study the translation regulation in poxvirus-infected cells. Uninfected and virus-infected cells were co-transfected with mRNAs encoding for firefly luciferase (Fluc) and Renilla luciferase (Rluc), with the Fluc mRNA containing a 5' Poly(A) leader sequence. Upon adding bioluminescent substrates on lysed cells, measure the signal from both the luciferases to identify the translational advantage of the Fluc mRNA in virus-infected cells, conferred by the leader...
FAQs
The regulatory sequence determines which biological input the assay reports. When a promoter or other regulatory element is placed upstream of luciferase, changes in transcription-factor activity or signaling can alter reporter expression. This arrangement lets investigators connect a cancer-related regulatory event to a measurable light signal, provided the cells are examined under defined experimental conditions.
Signal intensity is interpreted as an indicator of reporter expression, not as a direct measurement of every cellular event. The luciferase reaction occurs after substrate addition, so the measured output reflects the combined effect of regulatory control and the assay conditions. Maintaining comparable conditions is therefore important when comparing pathway responses or treatment effects across samples.
These assays can distinguish different questions by changing the regulatory sequence controlling luciferase. A promoter-responsive construct can be used to examine transcription-factor activity, whereas a sequence selected for pathway responsiveness can reveal pathway effects in cancer cells. The reporter does not identify the mechanism by itself; its meaning depends on the regulatory element and the biological context being tested.
A typical workflow begins with cultured cancer cells carrying a reporter under the control of a selected promoter or regulatory sequence. Researchers expose the cells to defined conditions, add a suitable substrate, and measure the light produced by luciferase. Comparing signals between conditions helps evaluate altered gene regulation, pathway responses, or effects associated with a treatment.
Luminescence Reporter Assays are useful for testing therapeutic effects because treatment-related changes in regulatory activity can be tracked through reporter output. In cancer research, investigators can examine how candidate anticancer compounds or other treatments influence gene regulation and cellular signaling. The resulting comparison supports studies of drug mechanisms while focusing on selected reporter-linked responses in cultured cancer cells.
High-throughput compatibility expands the number of conditions or candidate compounds that can be evaluated in cultured cancer cells. This makes the approach relevant to screening studies of tumor biology, drug mechanisms, and potential anticancer compounds. The key outcome is a set of light-based comparisons showing how selected regulatory or signaling responses change across the tested conditions.