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RAGE (receptor)
RAGE, the receptor for advanced glycation endproducts is a 35 kDa transmembrane receptor of the immunoglobulin super family which was first characterized in 1992 by Neeper ''et al.'' It is also called "AGER". Its name comes from its ability to bind advanced glycation endproducts (AGE), which include chiefly glycoproteins, the glycans of which have been modified non-enzymatically through the Maillard reaction. In view of its inflammatory function in innate immunity and its ability to detect a class of ligands through a common motif, RAGE is often referred to as a pattern recognition receptor. RAGE also has at least one other agonistic ligand: high mobility group protein B1 (HMGB1). HMGB1 is an intracellular DNA-binding protein important in chromatin remodeling which can be released by necrotic cells passively and by active secretion from macrophages, natural killer (NK) cells and dendritic cells.
The interaction between RAGE and its ligands is thought to result in pro-inflammatory gene activation. Due to an enhanced level of RAGE ligands in diabetes or other chronic disorders, this receptor is hypothesised to have a causative effect in a range of inflammatory diseases such as diabetic complications, Alzheimer's disease and even some tumors.
Isoforms of the RAGE protein, which lack the transmembrane and the signaling domain (commonly referred to as soluble RAGE or sRAGE) are hypothesized to counteract the detrimental action of the full-length receptor and are hoped to provide a means to develop a cure against RAGE-associated diseases.
== Gene and polymorphisms ==
The (human RAGE gene ) lies within the major histocompatibility complex (MHC) class III region on chromosome 6 and comprises 11 exons interlaced by 10 introns. Total length of the gene is about 1400 base pairs (bp) including the promoter region, which partly overlaps with the PBX2 gene. About 30 polymorphisms are known most of which are single nucleotide polymorphisms (SNP).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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