Fluorescent Reporter Strains
Fluorescent Reporter Strains - Related Videos
03:04
Generation of a Fluorescent Reporter Strain in Pseudomonas aeruginosa
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2025
Source: Rugjee, K. N. et. al., Establishment of a High-throughput Setup for Screening Small Molecules That Modulate c-di-GMP Signaling in Pseudomonas aeruginosa. J. Vis. Exp. (2016)This video demonstrates the generation of a cyclic-di-GMP-responsive reporter strain in Pseudomonas aeruginosa using electroporation. Successful transformation is confirmed through antibiotic selection and fluorescence-based...
14:53
High-throughput Screening and Biosensing with Fluorescent C. elegans Strains
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Cited by 63 •
2011
A procedure for liquid-based culturing and dispensing of C. elegans strains expressing fluorescent reporter proteins is described that does not require expensive sorting equipment. This approach can be applied to numerous inducible C. elegans genes for drug discovery or biosensing of contaminants.
02:45
Assessment of Viral Fusion Inhibitors Using a Cre-Inducible Fluorescent Reporter
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2026
Source: Esposito, A. M.,et al. High-throughput Cre-Lox Activated Viral Membrane Fusion Assay to Identify Inhibitors of HIV-1 Viral Membrane Fusion. J. Vis. Exp. (2018)This video demonstrates a co-culture fluorescent assay to monitor cell-to-cell viral transmission. The assay uses a red-to-green reporter cassette to visualize viral membrane fusion and evaluate the efficacy of test compounds in blocking viral entry.
03:49
A Luciferase-Fluorescent Reporter Influenza Virus to Track Viral Infections
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2025
This video demonstrates a method to track viral infections in mouse models using a recombinant luciferase and fluorescence protein-expressing bi-reporter Influenza A virus. This method enables both in vivo and ex vivo studies, enabling researchers to gain insights into viral dynamics and the effects of interventions.
05:26
Reporter Enzyme Fluorescence Imaging for In Vivo Tracking of Bacterial Infection
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2025
This video demonstrates the reporter enzyme fluorescence (REF) imaging for in vivo detection of Mycobacterium tuberculosis infection. The infected mice are intraperitoneally injected with a substrate for REF imaging. Upon being hydrolyzed by bacterial β-lactamase enzyme, the substrate emits fluorescence, the detection of which aids evaluation of infection.
FAQs
The selected promoter or regulatory sequence determines when reporter output changes. When that control region responds to the biological state being studied, activity of the reporter gene produces a corresponding fluorescence signal. Researchers can therefore treat signal variation as a readout of regulatory activity rather than as a direct measurement of every cellular process, keeping interpretation tied to the chosen control sequence.
Fluorescent reporter strains can be examined with different readout systems, and each supports a different scale of observation. Fluorescence microscopy reveals signals in cells or developing structures, flow cytometry measures signals across cell populations, and plate-based imaging supports measurements across experimental samples. Choosing among them connects the biological question to the spatial or population-level information required.
Changes in fluorescence are most informative when researchers relate them to the condition or process that controls the selected regulatory sequence. Environmental treatments can alter reporter output, allowing comparisons of cellular responses, while pathway-focused control regions can reveal activity in particular regulatory contexts. The reporter does not replace experimental interpretation; its meaning depends on what sequence drives expression.
Constructing a useful strain begins by selecting a promoter or regulatory sequence linked to the process of interest, then placing a reporter gene under its control in the organism. After the strain is generated, researchers expose it to relevant conditions and record fluorescence with microscopy, flow cytometry, or plate-based imaging. This workflow links genetic design, treatment, and signal measurement.
Use fluorescent reporter strains when a study needs to follow changing gene regulation or cell state rather than rely on a single endpoint. Repeated fluorescence measurements can track responses to environmental conditions or experimental treatments, while the chosen imaging platform determines whether the result emphasizes individual cells, broader populations, or multiple samples. This makes the approach useful for dynamic biological comparisons.
In biology, these strains help investigate microbial behavior, development, disease mechanisms, and responses to experimental treatments. Their value lies in connecting a visible signal with activity governed by a selected promoter or regulatory sequence, so researchers can follow how that activity changes in a defined context. The same general strategy therefore supports questions spanning cells, organisms, and biological conditions.