The KPL-1 monoclonal antibody specifically binds to p-selectin glycoprotein ligand-1 (PSGL-1), a 120-220 kDa, mucin-like type I transmembrane glycoprotein. CD162 is expressed on neutrophils, monocytes, and most lymphocytes. CD162 binds to CD62P (P-Selectin), CD62E (E-Selectin) and CD62L (L-Selectin). This molecule mediates rolling of leukocytes on activated endothelium and the interaction between leukocytes and activated platelets or other leukocytes found at inflammatory sites. It has also been reported that this clone completely inhibits the interaction between P-Selectin and either CD4-T cells or neutrophils.
The antibody was conjugated to BD Horizon™ BUV496 which is part of the BD Horizon Brilliant™ Ultraviolet family of dyes. This dye is a tandem fluorochrome of BD Horizon BUV395 with an Ex Max of 348-nm and an acceptor dye with an Em Max at 496-nm. BD Horizon BUV496 can be excited by the ultraviolet laser (355 nm) and detected with a 515/30 nm filter with a 450LP. Due to the excitation of the acceptor dye by other laser lines, there may be significant spillover into the channel detecting BD Horizon V500 or BV510 (eg, 525/40-nm filter). However, the spillover can be corrected through compensation as with any other dye combination.