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Antigen processing, or the cytosolic pathway, is an immunological process that prepares antigens for presentation to special cells of the immune system called T lymphocytes. It is considered to be a stage of antigen presentation pathways.
The cGAS–STING pathway is a component of the innate immune system that functions to detect the presence of cytosolic DNA and, in response, trigger expression of inflammatory genes that can lead to senescence [1] or to the activation of defense mechanisms. DNA is normally found in the nucleus of the cell.
Alloimmunity (sometimes called isoimmunity) is an immune response to nonself antigens from members of the same species, which are called alloantigens or isoantigens.Two major types of alloantigens are blood group antigens [1] and histocompatibility antigens.
HLA-DM (human leukocyte antigen DM) is an intracellular protein involved in the mechanism of antigen presentation on antigen presenting cells (APCs) of the immune system. [2] It does this by assisting in peptide loading of major histocompatibility complex (MHC) class II membrane-bound proteins. [3] HLA-DM is encoded by the genes HLA-DMA and HLA ...
Antigen presentation is a vital immune process that is essential for T cell immune response triggering. Because T cells recognize only fragmented antigens displayed on cell surfaces, antigen processing must occur before the antigen fragment can be recognized by a T-cell receptor.
IgG2 represents the major antibody subclass reacting to glycan antigens but IgG1 and IgG3 subclasses have also been observed in such responses, particularly in the case of protein-glycan conjugates. [9] IgG3 is an efficient activator of pro-inflammatory responses by triggering the classical complement pathway. [10]
The MHC I pathway is normally used to present endogenous antigens that have infected a particular cell. However, cross presenting cells are able to utilize the MHC I pathway to present exogenous antigens (ones not from the cell itself) to trigger an adaptive immune response by activating cytotoxic CD8+ T cells recognizing the exogenous antigens ...
The pathway involved in specific cases is dictated by intrinsic and extrinsic factors of allograft and directly influence nature and magnitude of T lymphocytes mediated immune response. Furthermore, variant tissues and organs such as skin or cornea or solid organ transplants can be recognized in different pathways and therefore are rejected in ...