The NLDC-145 monoclonal antibody specifically recognizes CD205 which is also known as Dendritic and thymic Epithelial Cells, 205 kDa (DEC-205) or Lymphocyte antigen 75 (Ly-75). CD205 (DEC-205) is a ~205 kDa type 1 transmembrane glycoprotein that is encoded by Ly75 which belongs to the mannose receptor family within the C-type lectin superfamily. The extracellular region contains an N-terminal cysteine-rich domain followed by a fibronectin type II domain, 10 C-type lectin-like domains, a transmembrane region and cytoplasmic tail with an internalization sequence. CD205 (DEC-205) is highly expressed on both CD8+ and CD103+ dendritic cell subsets and Langerhans cells. It is variably expressed by some other dendritic cell types, Gr1+ bone marrow cells, B cells, T cells, thioglycolate-elicited macrophages, granulocytes, mucosal and thymic cortical epithelial cells, and brain endothelial cells. CD205 (DEC-205) serves as a pattern recognition receptor that functions as a recycling endocytic receptor. It participates in the cellular processing, presentation, and cross-presentation of foreign or self-antigens to initiate immunity or tolerance, respectively. CD205 (DEC-205) can reportedly serve as a promising target for immunotherapy including DC-targeted vaccination using anti-CD205 (DEC-205) monoclonal antibody conjugated with antigen for T cell activation.
The antibody was conjugated to BD Horizon™ BB700, which is part of the BD Horizon Brilliant™ Blue family of dyes. It is a polymer-based tandem dye developed exclusively by BD Biosciences. With an excitation max of 485 nm and an emission max of 693 nm, BD Horizon BB700 can be excited by the 488 nm laser and detected in a standard PerCP-Cy™5.5 set (eg, 695/40-nm filter). This dye provides a much brighter alternative to PerCP-Cy5.5 with less cross laser excitation off the 405 nm and 355 nm lasers.