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MACROPHAGES
Jonathan M. Austyn has written: 'Principles of cellular and molecular immunology' -- subject(s): Cellular Immunity, Immunity, Molecular biology, Molecular immunology 'Antigen-presenting cells' -- subject(s): Antigen presenting cells, Antigen-Presenting Cells, Immunology
natural killer cells.
Dendritic cells,macrophages, B cells
Antigen-presenting cells display foreign antigens on the cell surface with the hopes of T cells noticing recognizing these complexes. The cells that do this on a routine basis are called Professional APC's. This group consists of dendritic cells, macrophages, B-cells, and certain activated epithelial cells.
There are two classes of MHC. MHC I are expressed in all cells except red blood cells (because they lack nuclei). MHC I andMHC II are expressed in professional antigen presenting cells (APC's) that include :macrophages, dendritic cells and B cells.
The Phagocytosis of microbes by antigen-presenting cells.
They are the antigen presenting cells (APCs) of the skin. They capture antigens and then migrate to the lymph nodes where they present to T cells.
Yes. The first signal that a T cell receives from an antigen presenting cell (dendritic cell) is MHC presenting an antigen (foreign peptide). This gives the T cell specificity to this antigen.
Answer Class II MHC protein. Class II are found in membranes of antigen-presenting cells-phagocytic cells and lymphocytes. The liver performs phagocytosis and antigen presentation.
They are "phagocytes." Phagocytes include cells called neutrophils, monocytes, macrophages, dendritic cells, and mast cells. NEUTROPHILS - first line of defense mechanisms. MACROPHAGES - second line of defense mechanisms. Phagocytosis is a process by which macrophages (a type of white blood cells) engulf pathogens and cell debris.
T cells (both CD4 "helper" and CD8 "cytotoxic" cells) are activated by antigen presenting cells (i.e. dendritic cells). This involves 3 different signals from the dendritic cell:1. Major Histocompatibility Complex (MHC) presents an antigen (foreign peptide) to the T cell2. A co-stimulatory signal (checking that it is a "professional" antigen presenting cell) which is a B7 molecule binding to a CD28 on the T cell3. Cytokines (signalling molecule)It is this 3rd type of signal, the cytokines which is important in the creation of the different T cells (CD8, or cytotoxic T cells and CD4, helper T cells).Dendritic cells are able to release different cytokines, which cause T cell differentiation.CD4 cells are presented antigen by MHC class II, whereas CD8 cells are presented antigen by MHC I.