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They can be identified using flow cytometry or immunohistochemical staining by their specific expression of proteins such as CD14, CD40, CD11b, CD64, F4/80 (mice)/EMR1 (human), lysozyme M, MAC-1/MAC-3 and CD68. [9] Macrophages were first discovered and named by Élie Metchnikoff, a Russian Empire zoologist, in 1884. [10] [11]
The CD nomenclature was proposed and established in the 1st International Workshop and Conference on Human Leukocyte Differentiation Antigens (HLDA), held in Paris in 1982. [4] [5] This system was intended for the classification of the many monoclonal antibodies (mAbs) generated by different laboratories around the world against epitopes on the surface molecules of leukocytes (white blood cells).
Foamy macrophages are also found in diseases caused by pathogens that persist in the body, such as Chlamydia, Toxoplasma, or Mycobacterium tuberculosis. In tuberculosis (TB), bacterial lipids disable macrophages from pumping out excess LDL, causing them to turn into foam cells around the TB granulomas in the lung. The cholesterol forms a rich ...
Micrograph showing hemosiderin-laden alveolar macrophages, as seen in a pulmonary hemorrhage. H&E stain. An alveolar macrophage, pulmonary macrophage, (or dust cell) is a type of macrophage, a professional phagocyte, found in the airways and at the level of the alveoli in the lungs, but separated from their walls. [1]
ED1 is the most widely used monoclonal antibody clone directed against the rat CD68 protein and is used to identify macrophages, Kupffer cells, osteoclasts, monocytes, and activated microglia in rat tissues. [13] [14] [15] In this species, it is expressed in most macrophage populations and thus ED1 is commonly used as a pan-macrophage marker. [16]
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. CD69: An early activation marker on T cells and NK cells. CD70
With its expression on neutrophils, CD16 represents a possible target in cancer immunotherapy. Margetuximab , an Fc-optimized monoclonal antibody that recognizes the human epidermal growth factor receptor 2 (HER2) expressed on tumor cells in breast, bladder, and other solid tumor cancers, targets CD16A in preference to CD16B. [ 18 ]
A macrophage-activating factor (MAF) is a lymphokine or other receptor based signal that primes macrophages towards cytotoxicity to tumors, cytokine secretion, or clearance of pathogens. Similar molecules may cause development of an inhibitory, regulatory phenotype.
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