Macrophage Response
Macrophage Response - Related Videos
05:05
In Vivo Activation of Peritoneal Macrophages in Response to Antibodies in a Murine Model
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2025
This video demonstrates the activation of a mouse's peritoneal macrophages using intravenous immunoglobulin and bacterial lipopolysaccharide. The co-stimulation activates the peritoneal macrophages into anti-inflammatory macrophages possessing immune regulatory activity.
12:47
Using RNA-interference to Investigate the Innate Immune Response in Mouse Macrophages
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Cited by 8 •
2014
In this protocol, we describe methods to efficiently transfect murine macrophage cell lines with siRNAs using the Amaxa Nucleofector 96-well Shuttle System, stimulate the macrophages with lipopolysaccharide, and monitor the effects on inflammatory cytokine production.
06:51
Activation of Mouse Bone Marrow-Derived Macrophages in Response to Antibodies
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2025
In this video, we demonstrate the activation of bone marrow-derived macrophages in response to bacterial lipopolysaccharide and intravenous immunoglobulin.
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.
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.
FAQs
Pattern-recognition receptors act as sensing points that help macrophages detect molecular cues associated with pathogens, damaged cells, or foreign materials. Once engaged, they regulate downstream activities such as engulfment, cytokine release, and antigen presentation. Signals from the surrounding microenvironment further modify these reactions, helping determine how macrophages interact with a bioengineered construct.
The balance between inflammatory and tissue-repair states influences whether an implanted or engineered system supports recovery or promotes prolonged tissue disruption. Excessive or persistent inflammation can contribute to chronic inflammation and fibrosis, whereas repair-associated activity can support tissue remodeling and vascularization. Designing materials that guide this balance is therefore central to improving host compatibility.
Phagocytosis, cytokine release, and antigen presentation provide complementary information about macrophage activation. Phagocytosis indicates how cells handle foreign or damaged material, cytokines reveal signaling that can influence surrounding tissue, and antigen presentation reflects an additional immune function. Examining these activities together gives a broader picture of how a construct shapes innate immune behavior.
Evaluation can show how an implant or biomaterial interacts with host immunity and whether its presence is associated with responses relevant to integration. The findings may indicate potential for chronic inflammation, fibrosis, tissue remodeling, or vascularization. This information helps bioengineers compare designs and identify materials or configurations more likely to support long-term device integration.
In drug-delivery systems and engineered tissues, macrophage response provides an immune-compatibility perspective alongside the intended therapeutic or structural function. Researchers can examine whether the system changes macrophage recruitment or activation in ways that support tissue remodeling and vascularization, or instead encourage prolonged inflammation and fibrosis. These observations inform the design of more compatible regenerative therapies.
Controlling recruitment and activation aims to direct macrophages toward responses that are compatible with healing and integration rather than persistent inflammatory activity. In bioengineering, this strategy can help reduce chronic inflammation and fibrosis while supporting vascularization, tissue remodeling, and acceptance of the device or construct. It therefore links immune regulation directly to the performance of regenerative therapies.