Effector Cells
Effector Cells - Related Videos
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.
08:39
Electroporation of Functional Bacterial Effectors into Mammalian Cells
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Cited by 7 •
2015
Electroporation was used to insert purified bacterial virulence effector proteins directly into living eukaryotic cells. Protein localization was monitored by confocal immunofluorescence microscopy. This method allows for studies on trafficking, function, and protein-protein interactions using active exogenous proteins, avoiding the need for heterologous expression in eukaryotic cells.
04:41
Introduction of Bacterial Effector Proteins into Mammalian Cells by Electroporation
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2025
In this video, we demonstrate the introduction of bacterial effector proteins into mammalian cells by electroporation. The intracellular localization of the bacterial effector proteins is detected by confocal microscopy following staining with specific fluorophore-conjugated antibodies.
02:20
Monitoring Bacterial Infection and Effector Protein Delivery in Plant Cells
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2025
Source: Lee, H. et. al., Split Green Fluorescent Protein System to Visualize Effectors Delivered from Bacteria During Infection. J. Vis. Exp. (2018)This video demonstrates a method for monitoring bacterial infection and effector protein delivery in plant cells using split superfolder green fluorescent protein (sfGFP) complementation combined with confocal microscopy. The approach enables precise visualization of effector translocation into the host cell cytosol.
09:59
Imaging Effector Memory T cells in the Ear After Induction of Adoptive DTH
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Cited by 2 •
2008
Here we demonstrate a method for inducing and recording the progress of a delayed type-hypersensitivity (DTH) reaction in the rat ear. This is followed by a demonstration of the preparation of rat ear tissue for two-photon imaging of the effector / memory T cell response.
FAQs
Receptors help effector cells recognize specific targets or danger signals, linking activation to an appropriate response. Depending on the cell and stimulus, this response may include cytokine secretion, antibody release, phagocytosis, or cytotoxic granule exocytosis. Recognition therefore does more than identify a threat; it directs the mechanism used to contain, destroy, or regulate the immune challenge.
Effector T cells and natural killer cells can eliminate infected or malignant cells through cellular immune actions. Macrophages instead contribute through phagocytosis and inflammatory coordination, while antibody-secreting cells release antibodies that help contain pathogens. These distinct activities allow immune defenses to act against different types of threats and to combine direct elimination with broader coordination.
Cytokines provide communication signals that shape immune activity and help coordinate inflammation. Their secretion allows activated cells to influence surrounding immune responses rather than acting only on an immediate target. In this way, cytokine production connects the activity of individual effector cells with wider host protection and immune regulation, although the overview does not specify individual cytokines or their separate effects.
Examining which effector cells respond, which targets they recognize, and which mechanisms they use can clarify how host protection is organized. Researchers can relate cellular actions such as cytotoxicity, phagocytosis, antibody release, or cytokine secretion to immune regulation. These observations help interpret whether a response is effectively containing a threat or is associated with immune dysfunction.
Effector-cell biology helps vaccine researchers consider how antigen exposure can activate precursor lymphocytes and generate functional immune responses. The resulting cells may support pathogen control through antibody release, cytokine secretion, or other defense mechanisms. Understanding these outcomes can guide evaluation of whether a vaccine promotes the types of immune activity needed for effective host protection.
Their activities provide a way to examine both protective and harmful immune responses. In infection, researchers can assess how cells contain pathogens; in cancer, they can study elimination of malignant cells. Autoimmunity highlights situations in which immune activity becomes damaging to the host. These contexts also support immunotherapy development and interpretation of immune dysfunction.