IMMUNOGLOBULIN G RECEPTOR Meaning and
Definition
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Immunoglobulin G Receptor (IgG receptor) refers to a type of protein located on the surface of certain immune cells. It specifically binds to Immunoglobulin G (IgG), which is the most common class of antibodies found in the bloodstream. IgG receptors play a crucial role in the immune response by facilitating the recognition and elimination of foreign invaders, such as bacteria, viruses, and other pathogens.
These receptors are found on various immune cells, including macrophages, neutrophils, dendritic cells, and natural killer cells. They are categorized into different subclasses based on their specific binding properties. The most well-known IgG receptor is Fcγ receptor, which specifically recognizes the Fc region of IgG antibodies.
When an immune response is initiated, IgG antibodies are produced and bind to the antigens on the surface of pathogens. The Fc region of the bound IgG antibody then interacts with the IgG receptor on immune cells, initiating a cascade of signaling events that trigger immune cell activation. This activation can lead to phagocytosis, in which the immune cells engulf and destroy the antibody-bound pathogen, or it can initiate antibody-dependent cell-mediated cytotoxicity (ADCC), where target cells are directly killed by immune cells.
The IgG receptor interaction is an essential component of the humoral immune response, allowing immune cells to recognize and quickly respond to foreign invaders. Research and understanding of IgG receptor function contribute to the development of therapeutic strategies aimed at enhancing immune responses and treating various infectious diseases and immune disorders.
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