MERTK Monoclonal Antibody (HMER5DS), APC, eBioscience™, Invitrogen™

Description

• Description: This HMER5DS antibody recognizes human MerTK, known also as Mer or c-mer, a 170-210 kDa member of the TAM family of tyrosine kinase receptors that also includes Axl and Tyro3
• MerTK is expressed on a subset of anti-inflammatory macrophages and is involved in the removal of apoptotic cells
• This process relies on two soluble ligands of Mer,TK Protein S and Gas6, that coat the surface of cells undergoing apoptosis
• Upon binding these ligands, MerTK undergoes autophosphorylation at multiple tyrosine residues that activate the PI3K and Akt pathways
• This results in the phagocytosis of target cells and also the direct inhibition of TLR-induced production of pro-inflammatory cytokines by the phagocytes
• Mer may also function as a putative entry receptor for filoviruses
• Deficiency of MerTK causes general autoimmunity, inflammation, and accumulation of apoptotic bodies
• MerTK can be released from the cell surface by metalloproteinases, and this process is significantly enhanced when macrophages are stimulated, e.g
• with LPS
• MerTK is often expressed on maligt cells, and may be implicated in immune evasion
• Applications Reported: This HMER5DS antibody has been reported for use in flow cytometric analysis
• Applications Tested: This HMER5DS antibody has been pre-titrated and tested by flow cytometric analysis of human monocyte-derived macrophages
• This can be used at 5 μL (0.06 μg) per test
• MERTK (cMER) is a tyrosine kinase proto-oncogene and is involved in the retinal pigment epithelium (RPE) phagocytosis pathway, which is implicated in human retinal disease
• Regulates many physiological processes including cell survival, migration, differentiation, and phagocytosis of apoptotic cells (efferocytosis)
• Ligand binding at the cell surface induces autophosphorylation of MERTK on its intracellular domain that provides docking sites for downstream signaling molecules
• Following activation by ligand, interacts with GRB2 or PLCG2 and induces phosphorylation of MAPK1, MAPK2, FAK/PTK2 or RAC1
• MERTK signaling plays a role in various processes such as macrophage clearance of apoptotic cells, platelet aggregation, cytoskeleton reorganization and engulfment
• Functions in the retinal pigment epithelium (RPE) as a regulator of rod outer segments fragments phagocytosis
• Plays also an important role in inhibition of Toll-like receptors (TLRs)-mediated innate immune response by activating STAT1, which selectively induces production of suppressors of cytokine signaling SOCS1 and SOCS3.