HM alpha 5-1
The HMα5-1 antibody specifically recognizes the α5 subunit of the integrin α5β1 fibronectin receptor (CD49e/CD29, VLA-5) on mouse thymocytes and a variety of mouse cell lines, including pre-B and non-lymphoid cells, but not on mouse splenic or lymph node cells. It also detects rat CD49e on the RBL2H3 basophilic leukemia cell line,peritoneal mast cells, and endothelium, but not on splenocytes. It has been reported that soluble mAb HMα5-1 partially inhibits in vitro binding of a mouse cell line and of rat mast cells to fibronectin and inhibits the enhanced degranulation of IgE-sensitized rat RBL cells induced on fibronectin-coated plates. It has also been observed that plate-bound HMα5-1 antibody enhances the degranulation of IgEsensitized rat RBL-2H3 cells and that subcutaneous injection of HMα5-1 mAb into rats, along with anti-CD49d and anti-CD61 antibodies, inhibits experimentally induced passive cutaneous anaphylaxis.
The antibody was conjugated to BD Horizon™ BUV737 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 737-nm. BD Horizon Brilliant BUV737 can be excited by the ultraviolet laser (355 nm) and detected with a 740/35 filter. Due to the excitation of the acceptor dye by other laser lines, there may be significant spillover into channels detecting Alexa Fluor® 700-like dyes (eg, 712/20-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 BUV737 reagents. Therefore, the use of BD CompBeads or BD CompBeads Plus to determine spillover values for these reagents is not recommended. Different BUV737 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.