The 6B7 monoclonal antibody specifically binds to IL-17 Receptor B (IL-17RB), which is a single-pass type I transmembrane protein and a component of the heterodimeric receptor for IL-25 (also known as IL-17E). Several components of the IL-17RB signaling mechanism have been identified, including ACT1, TRAF4, SMURF2, DAZAP2, and STAT5. The cytoplasmic tails of both of the IL-25 Receptor components, IL-17RA and IL-17RB, and ACT1 contain the SEFIR (similar expression to fibroblast growth factor genes and IL-17R) domain that is essential for IL-25R-mediated signaling. Signaling through IL-17RB mediates Th2 immune responses and is responsible for pathogenesis in a murine model for asthma. IL-17RB is found on subsets of iNKT cells, Th2 cells, some myeloid cells in solid organs, and type 2 innate lymphoid cells (ILC2) in lung, peritoneum, mesenteric lymph nodes and bone marrow.
The antibody was conjugated to BD Horizon™ BUV661 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 661-nm. BD Horizon Brilliant BUV661 can be excited by the ultraviolet laser (355 nm) and detected with a 670/25 filter and a 630 nm LP. Due to cross laser excitation of this dye, there may be significant spillover into channels detecting APC-like emissions (eg, 670/25-nm filter).
Due to spectral differences between labeled cells and beads, using BD™ CompBeads can result in incorrect spillover values when used with BD Horizon BUV661 reagents. Therefore, the use of BD CompBeads or BD CompBeads Plus to determine spillover values for these reagents is not recommended. Different BUV661 reagents (eg, CD4 vs. CD45) can have slightly different fluorescence spillover therefore, it may also be necessary to use clone-specific compensation controls when using these reagents.