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Due to their role in phagocytosis, macrophages are involved in many diseases of the immune system. For example, they participate in the formation of granulomas, inflammatory lesions that may be caused by a large number of diseases. Some disorders, mostly rare, of ineffective phagocytosis and macrophage function have been described, for example ...
The two main cells that do this are the Macrophages and the Neutrophils of the immune system. Where phagocytosis is used as a means of feeding and provides the organism part or all of its nourishment, it is called phagotrophy and is distinguished from osmotrophy, which is nutrition taking place by absorption. [citation needed]
Macrophages, neutrophils, and dendritic cells are all cells of the innate immune system that utilize phagocytosis and are equipped with Toll-like receptors (TLR). Toll-like receptors are present on each of these cells and recognize a variety of microbial products resulting in the induction of more specific immune responses. [ 2 ]
Liver macrophage; Macrophagocytus stellatus; 20-21 Foreign debris; General macrophage targets [11] [8] Alveolar macrophage: Monocyte: Macrophage: Pulmonary macrophage; Dust cell; 20-21 Carbon debris from lungs; General macrophage targets [8] Dendritic cell: Monocyte: Dendritic cell: DC; Cellula dendritiformis; 10-15 Process antigen material and ...
110 kDa highly glycosylated transmembrane protein which is mainly located in lysosomes. Present in macrophages in many human tissues including Kupffer's cells and macrophages in the red pulp of the spleen, in lung alveoli, in lamina propria of the gut, and in the bone marrow. Used as immunocytochemical marker for staining of monocytes/macrophages.
The mononuclear phagocyte system and the monocyte macrophage system refer to two different entities, often mistakenly understood as one. [citation needed] "Reticuloendothelial system" is an older term for the mononuclear phagocyte system, but it is used less commonly now, as it is understood that most endothelial cells are not macrophages. [2]
A macrophage's location can determine its size and appearance. Macrophages cause inflammation through the production of interleukin-1, interleukin-6, and TNF-alpha. [75] Macrophages are usually only found in tissue and are rarely seen in blood circulation. The life-span of tissue macrophages has been estimated to range from four to fifteen days ...
CD14 is expressed mainly by macrophages and (at 10-times lesser extent) by neutrophils.It is also expressed by dendritic cells.The soluble form of the receptor (sCD14) is secreted by the liver and monocytes and is sufficient in low concentrations to confer LPS-responsiveness to cells not expressing CD14. mCD14 and sCD14 are also present on enterocytes.