Reporter Macrophages
Reporter Macrophages - Related Videos
10:07
Investigation of Macrophage Polarization Using Bone Marrow Derived Macrophages
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Cited by 326 •
2013
The article describes a readily easy adaptive in vitro model to investigate macrophage polarization. In the presence of GM-CSF/M-CSF, hematopoietic stem/progenitor cells from the bone marrow are directed into monocytic differentiation, followed by M1 or M2 stimulation. The activation status can be tracked by changes in cell surface antigens, gene expression and cell signaling pathways.
06:46
Culture of Macrophage Colony-stimulating Factor Differentiated Human Monocyte-derived Macrophages
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Cited by 58 •
2016
A protocol is presented for cell culture of macrophage colony-stimulating factor (M-CSF) differentiated human monocyte-derived macrophages. The protocol utilizes cryopreservation of monocytes coupled with their bulk differentiation into macrophages. Then harvested macrophages can then be seeded into culture wells at required cell densities for carrying out experiments.
08:50
Depletion and Reconstitution of Macrophages in Mice
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Cited by 118 •
2012
Macrophages play a central role in homeostasis and pathology in many tissues. The protocol presented here describes methods for depleting macrophages in vivo, deriving polarized macrophages from bone marrow aspirates, and adoptively transferring macrophages into mice. These techniques allow determination of the role that polarized macrophages play in health and disease.
05:19
Visualization of Caspase Activation in Human Monocyte-Derived Macrophages
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2025
This video demonstrates the activation of caspase proteins in human macrophages using bimolecular fluorescence complementation reporter proteins. The pro-domains of caspase-1 are fused with non-fluorescent fragments of Venus proteins, which are recruited to inflammasome complexes. The proximity of inflammasomes induces the refolding and fluorescence of Venus fragments, confirming caspase activation in the macrophages.
07:06
Bone Marrow-derived Macrophage Production
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Cited by 205 •
2013
Macrophages have long been recognized as a critical component of the innate and adaptive immune responses. The recent explosion of knowledge pertaining to evolutionary, genetic, and biochemical aspects of the interaction between macrophages and microbes has renewed scientific attention to macrophages. This article describes a method to differentiate macrophages from mouse bone marrow.
FAQs
The linked promoter or cellular event determines what the reporter signal represents. An infection-responsive promoter can couple signal production to changes associated with infection, whereas an event-linked system can indicate a process such as pathogen uptake or intracellular survival. This design choice controls which aspect of macrophage activation or host-pathogen interaction the assay measures.
Reporter output can be interpreted across several stages of infection, but the measured signal must be matched to the biological event selected during system design. Signals may provide information about uptake, intracellular survival, inflammatory signaling, or gene-expression changes. Consequently, comparisons require a consistent reporter linkage so differences reflect the process under investigation.
They differ primarily in the form of signal available for measurement. Fluorescent reporters can support visualization by microscopy, while luminescent and enzymatic systems can contribute to quantitative assay formats, depending on the experimental design. The selected modality therefore influences whether investigators emphasize cellular location, measurable signal intensity, or complementary views of both.
Macrophage heterogeneity matters because cells in the same experimental population may not respond identically to infection or stimulation. Reporter systems can reveal variation in activation or behavior rather than only an averaged endpoint, especially when signals are examined over time or across cells. This helps relate population-level measurements to distinct cellular responses.
A typical experiment starts by choosing a reporter whose promoter or cellular-event linkage matches the research question. Reporter macrophages are then examined during pathogen interaction or treatment, using microscopy or a quantitative assay to record the resulting signal. Researchers can compare these measurements across microbes, immune conditions, or antimicrobial and immunomodulatory interventions.
Signal measurements provide a common readout for examining how different microbes affect macrophage responses during infection. Depending on the reporter design, comparisons may focus on pathogen uptake, intracellular survival, inflammatory signaling, or gene-expression changes. This helps connect microbial differences with measurable host-cell outcomes rather than relying on a single descriptive observation.
Because their responses can be measured quantitatively, Reporter macrophages can be incorporated into screening strategies for antimicrobial or immunomodulatory treatments. A study can monitor how candidate interventions alter infection-associated signaling or cellular behavior and then compare results across conditions. Their support for high-throughput screening expands evaluation beyond individual microscopy observations.