The RM153 monoclonal antibody specifically recognizes a 40-kDa type-II membrane glycoprotein, CD30 ligand (CD30L or CD153), which belongs to the NGF/TNF superfamily. In the presence of cytokines, CD153 stimulates B-cell proliferation, antigen-specific antibody production, and polyclonal immunoglobulin secretion. In addition, it costimulates the proliferation of activated T cells. This molecule is expressed on activated T cells, predominantly CD4+, on activated EL4 cells, and on activated Th1 and Th2 cells. The RM153 mAb inhibits the binding of CD153 to CD30.
The antibody was conjugated to BD Horizon™ BV711 which is part of the BD Horizon Brilliant™ Violet family of dyes. This dye is a tandem fluorochrome of BD Horizon BV421 with an Ex Max of 405-nm and an acceptor dye with an Em Max at 711-nm. BD Horizon BV711 can be excited by the violet laser and detected in a filter used to detect Cy™5.5 / Alexa Fluor® 700-like dyes (eg, 712/20-nm filter). Due to the excitation and emission characteristics of the acceptor dye, there may be moderate spillover into the Alexa Fluor® 700 and PerCP-Cy5.5 detectors. However, the spillover can be corrected through compensation as with any other dye combination.