期刊
CELL COMMUNICATION AND SIGNALING
卷 20, 期 1, 页码 -出版社
BMC
DOI: 10.1186/s12964-021-00812-0
关键词
Scavenger receptors; Immunity; PAMPs; Signalling pathways; ACE-2
类别
资金
- Council of Scientific and Industrial Research
- CSIR, Government of India
Scavenger receptors are a diverse group of proteins that play a major role in innate immunity and homeostasis. They act as pattern recognition receptors and work together with other co-receptors to generate immune responses against various ligands. Their functions include adhesion, endocytosis, and phagocytosis, among others.
Scavenger receptors belong to a superfamily of proteins that are structurally heterogeneous and encompass the miscellaneous group of transmembrane proteins and soluble secretory extracellular domain. They are functionally diverse as they are involved in various disorders and biological pathways and their major function in innate immunity and homeostasis. Numerous scavenger receptors have been discovered so far and are apportioned in various classes (A-L). Scavenger receptors are documented as pattern recognition receptors and known to act in coordination with other co-receptors such as Toll-like receptors in generating the immune responses against a repertoire of ligands such as microbial pathogens, non-self, intracellular and modified self-molecules through various diverse mechanisms like adhesion, endocytosis and phagocytosis etc. Unlike, most of the scavenger receptors discussed below have both membrane and soluble forms that participate in scavenging; the role of a potential scavenging receptor Angiotensin-Converting Enzyme-2 has also been discussed whereby only its soluble form might participate in preventing the pathogen entry and replication, unlike its membrane-bound form. This review majorly gives an insight on the functional aspect of scavenger receptors in host defence and describes their mode of action extensively in various immune pathways involved with each receptor type.
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