Anti-Hu CD14 Purified Monoclonal Antibody

CD14 is a 55 kDa GPI-anchored glycoprotein, constitutively expressed on the surface of mature monocytes, macrophages, and neutrophils, where it serves as a multifunctional lipopolysaccharide receptor. It is also released to the serum both as a secreted and enzymatically cleaved GPI-anchored form. CD14 binds lipopolysaccharide molecule in a reaction catalyzed by lipopolysaccharide-binding protein (LBP), an acute phase serum protein. The soluble sCD14 is able to discriminate slight structural differences between lipopolysaccharides and is important for neutralization of serum allochthonous lipopolysaccharides by reconstituted lipoprotein particles. CD14 affects allergic, inflammatory and infectious processes.

Human monocytes. The mouse monoclonal antibody B-A8 reacts with CD14, a 53-55 kDa GPI (glycosylphosphatidylinositol) -linked extracellular membrane glycoprotein expressed on the surface of monocytes, macrophages and weakly on granulocytes; also expressed by most tissue macrophages.

Detected on macrophages (at protein level) (PubMed:1698311) . Expressed strongly on the surface of monocytes and weakly on the surface of granulocytes; also expressed by most tissue macrophages.

ELISA: The antibody B-A8 has been tested as the capture antibody in a sandwich ELISA for analysis of human CD14 in combination with antibody MEM-18 (cat. no. 1B-212-C100) . Flow cytometry: 1 μg/ml; Immunohistochemistry (paraffin sections) : 2-10 μg/ml, positive tissue: PML brain sections; positive staining on human PML brain sections was mainly observed on monocytes in the lumenal side of brain blood vessels, and on some perivascular cells adjacent to medium-sized vessels. Heat retrieval of antigen is recommeded.

Coreceptor for bacterial lipopolysaccharide (PubMed:1698311, PubMed:23264655) . In concert with LBP, binds to monomeric lipopolysaccharide and delivers it to the LY96/TLR4 complex, thereby mediating the innate immune response to bacterial lipopolysaccharide (LPS) (PubMed:20133493, PubMed:23264655) . Acts via MyD88, TIRAP and TRAF6, leading to NF-kappa-B activation, cytokine secretion and the inflammatory response (PubMed:8612135) . Acts as a coreceptor for TLR2:TLR6 heterodimer in response to diacylated lipopeptides and for TLR2:TLR1 heterodimer in response to triacylated lipopeptides, these clusters trigger signaling from the cell surface and subsequently are targeted to the Golgi in a lipid-raft dependent pathway (PubMed:16880211) . Binds electronegative LDL (LDL (-) ) and mediates the cytokine release induced by LDL (-) (PubMed:23880187) .