Effector Gene Amplification
Effector Gene Amplification - Related Videos
02:48
Loop-Mediated Isothermal Amplification for Bacterial Gene Detection
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2025
Source: Domesle, K. J., et al. Loop-Mediated Isothermal Amplification for Screening Salmonella in Animal Food and Confirming Salmonella from Culture Isolation. J. Vis. Exp. (2020).This video demonstrates the loop-mediated isothermal amplification (LAMP) technique for detecting a target bacterial gene by amplifying DNA at a constant temperature. The reaction mixture is prepared by adding an isothermal master mix, specific primers for the target gene, and samples containing DNA templates. The...
09:44
Rapid Amplification of cDNA Ends
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2023
Source: Pablo Sanchez Bosch2, Sean Corcoran2 and Katja Brückner1,2,3 1Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research 2Department of Cell and Tissue Biology, 3Cardiovascular Research Institute, University of California San Francisco, San Francisco, CA, USA Rapid Amplification of cDNA Ends (RACE) is a technique that allows amplification of full-length cDNA from mRNA by extending to the 3’ or 5’ end, even without prior knowledge of the sequence (Frohman et al.,...
12:23
Analysis of Yersinia enterocolitica Effector Translocation into Host Cells Using Beta-lactamase Effector Fusions
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Cited by 5 •
2015
Effector translocation into host cells via a type III secretion system is a common virulence strategy among gram-negative bacteria. A beta-lactamase effector fusion based assay for quantitative analysis of translocation was applied. In Yersinia infected cells, conversion of a FRET reporter by the beta-lactamase is monitored using laser scanning microscopy.
02:43
Transfection of an Inducible Gene Expression System into Cells Expressing a Bacterial Effector Protein
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2025
Source: Berens, C. et al. Applying an Inducible Expression System to Study Interference of Bacterial Virulence Factors with Intracellular Signaling. J. Vis. Exp. (2015)This video demonstrates the use of an inducible expression system to identify where the bacterial effector protein CaeB disrupts the host apoptotic cascade. It outlines the steps for transfecting CaeB-expressing cells with a tetracycline-responsive system to induce pro-apoptotic gene expression in order to identify the point of...
04:47
A Method to Assess Fc-mediated Effector Functions Induced by Influenza Hemagglutinin Specific Antibodies
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Cited by 6 •
2018
We describe a method to measure the activation of Fc-mediated effector functions by antibodies that target the influenza virus hemagglutinin. This assay can also be adapted to assess the ability of monoclonal antibodies or polyclonal sera targeting other viral surface glycoproteins to induce Fc-mediated immunity.
FAQs
Antigen recognition initiates signaling through immune receptors, which activates transcription factors and cytokine pathways. These signals can recruit chromatin remodeling, making relevant genomic regions more permissive for transcription. Positive feedback then reinforces production of effector molecules, allowing a response that begins with a localized signal to become stronger and more sustained within responsive immune cells.
Chromatin remodeling helps determine whether immune-response genes are accessible for transcription. When receptor-driven signaling promotes a more permissive chromatin state, transcription factors can act more effectively at relevant genes. This provides a regulatory layer beyond the initial receptor signal and helps explain how immune cells selectively increase cytokine, chemokine, or antimicrobial protein expression.
The response remains dependent on which immune cells receive and interpret the initiating signal. Cell-specific transcription factors, cytokine pathways, and chromatin states can therefore produce different effector profiles from related stimuli. This selectivity is important because it links localized antigen recognition to tailored pathogen control or inflammatory regulation rather than uniform activation across all cells.
Initial activation provides the triggering information, whereas amplification reflects the reinforced transcriptional response that follows. Receptor signaling, transcription-factor activity, cytokine pathways, chromatin remodeling, and positive feedback connect these stages. Distinguishing them helps researchers determine whether a weak response reflects inadequate recognition or failure to sustain effector-gene expression after signaling has begun.
Researchers can examine changes in transcription of genes encoding cytokines, chemokines, and antimicrobial proteins after immune recognition. Comparing these expression patterns across relevant conditions can reveal whether localized signals produce stronger, cell-specific responses. Such measurements help connect molecular activity with host defense, inflammatory regulation, pathogen evasion, or the establishment of immune memory.
Analyzing the strength and persistence of effector-gene expression can show how effectively host cells reinforce antimicrobial responses and where pathogens may interfere with them. The same framework can help identify transcriptional features associated with durable immune responses. Consequently, it provides context for studying both pathogen evasion strategies and the cellular basis of immune memory.
Effector gene amplification offers a way to evaluate whether an intervention produces appropriately strong and sustained immune-cell responses. In vaccine research, expression of effector molecules can help characterize protective immune activation. In therapy development, the same information may support approaches intended either to enhance inadequate host defense or to restrain excessive inflammatory activity.