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Internalization of surface components during Fc-receptor mediated phagocytosis by macrophages
1Laboratório de Ultraestrutura Celular Hertha Meyer, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Brasil.
Mouse peritoneal resident macrophages efficiently ingest IgG-coated erythrocytes through a phagocytic process mediated by Fc-receptors. During this process surface components of the macrophages, which can be labeled by cationized ferritin and gold-labeled lectins are not interiorized together with the IgG-coated erythrocytes. However, they are internalized through endocytic vesicles and concentrated into vacuoles which are part of the endosomal-lysosomal system. Later on some of these components either are recycled back to the cell surface or are released, due to a process of lysosome-phagosome fusion, into the erythrocyte-containing phagosomes.
Mouse peritoneal resident macrophages efficiently ingest IgG-coated erythrocytes through a phagocytic process mediated by Fc-receptors. During this process surface components of the macrophages, which can be labeled by cationized ferritin and gold-labeled lectins are not interiorized together with the IgG-coated erythrocytes. However, they are internalized through endocytic vesicles and concentrated into vacuoles which are part of the endosomal-lysosomal system. Later on some of these components either are recycled back to the cell surface or are released, due to a process of lysosome-phagosome fusion, into the erythrocyte-containing phagosomes.