Cardiac Macrophages
Cardiac Macrophages - Related Videos
06:10
Transplantation of Neonatal Mouse Cardiac Macrophages into Adult Mice
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Cited by 2 •
2021
We provide a protocol for neonatal cardiac macrophage separation and transplantation into an adult mouse heart, which could be a promising way to promote cardiac repair.
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.
08:25
Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling
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Cited by 11 •
2015
Streptococcus pneumoniae forms discrete non-purulent microscopic lesions in the heart. Outlined is the protocol for a murine model of cardiac microlesion formation. Instruction is provided on microlesion visualization using microscopy, discrimination between early and late microlesions, and methods to detect cardiac remodeling in hearts of convalescent animals.
08:43
Isolation and Culture of Resident Cardiac Macrophages from the Murine Sinoatrial and Atrioventricular Node
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Cited by 4 •
2021
The protocol presented here provides a step-by-step approach for the isolation of cardiac resident macrophages from the sinoatrial node (SAN) and atrioventricular node (AVN) region of mouse hearts.
FAQs
Resident populations are already established within cardiac tissue, whereas recruited macrophages arrive in response to conditions such as myocardial infarction, infection, or tissue damage. This distinction matters because the two sources can make different contributions to inflammation and remodeling. Separating them helps researchers determine which macrophage responses support repair and which may promote persistent injury or fibrosis.
Their effects extend beyond debris removal. Through signaling molecules, cardiac macrophages can communicate with cardiomyocytes, fibroblasts, and other immune cells, thereby shaping inflammation and tissue responses. These interactions provide a mechanism for coordinating cleanup with repair, while also creating the possibility that prolonged or poorly regulated signaling could contribute to adverse remodeling.
Some resident cardiac macrophage populations are associated with blood vessel formation and electrical conduction, indicating that their functions include more than immune defense. These relationships connect macrophage biology with tissue organization and cardiac performance. Research on these populations may therefore reveal how immune cells contribute to maintaining specialized heart functions in addition to responding to injury.
Plasticity describes the capacity of macrophage populations to alter their activities according to tissue conditions. In the heart, that flexibility is important because responses that help manage injury may also influence inflammation, repair, and fibrosis. Studying the signals associated with these changing states can clarify how cardiac macrophages shift between beneficial healing responses and pathological remodeling.
Studies of development can ask how cardiac macrophage populations arise, become established, and acquire functions within heart tissue. Combining developmental questions with analyses of signaling and plasticity helps distinguish stable resident characteristics from responses acquired after injury. This framework is useful for explaining why macrophage populations may have different effects on inflammation, repair, and cardiac tissue organization.
Myocardial infarction provides a setting for examining how recruited macrophages participate in inflammation and tissue remodeling. Researchers can relate macrophage behavior to debris clearance, communication with cardiac and stromal cells, and the balance between healing and pathological fibrosis. These investigations help identify which aspects of the post-infarction response might be beneficial or harmful.
The therapeutic goal is not simply to increase or eliminate macrophage activity. Instead, research may support strategies that promote healing while limiting pathological fibrosis. Understanding macrophage development, signaling, and plasticity could help identify ways to favor beneficial tissue responses, particularly during cardiovascular disease or after myocardial infarction, without disrupting functions needed for tissue integrity.