Description: This 87.1 monoclonal antibody reacts with non-human primate (specifically rhesus) CD185. CD185, which is also known as C-X-C chemokine receptor 5 (CXCR5) and Burkitt lymphoma receptor 1 (BLR1), is a seven transmembrane G protein-coupled receptor originally identified in Burkitt's lymphoma. In peripheral blood, CD185 is expressed on B cells, CD4+ T cells (but not Th1 or Th2 cells), and a subpopulation of memory (CD45RO+) T cells. CD185+ circulating T cells are in a resting state and migrate to the lymph nodes due to CCR7 and CD62L expression. In tonsils, CD185 is expressed on nearly all CD4+ cells along with CD45RO and the activation markers CD69 and ICOS. Tonsillar CD185+ cells have been shown to induce antibody production when co-cultured with B cells, thus supporting their role in providing B cell help. Furthermore, this chemokine receptor plays a critical role in lymphocyte trafficking, in particular CXCL13-induced T cell migration into the B cell follicles of germinal centers. Thus, CD185 is an established marker of follicular helper T cells (Tfh). In rhesus macaques, infection with simian immunodeficiency virus (SIV) has been reported to increase the number of germinal centers and Tfh cells within the lymph nodes.
Refer to the rhesus reactive alternative clone MU5UBEE (cat. 12-9185) for identification of CXCR5 on T cells in addition to B cells.
Applications Reported: This 87.1 antibody has been reported for use in flow cytometric analysis.
Applications Tested: This 87.1 antibody has been pre-titrated and tested by flow cytometric analysis of normal rhesus peripheral blood cells. This can be used at 5 µL (0.125 µg) per test. A test is defined as the amount (µg) of antibody that will stain a cell sample in a final volume of 100 µL. Cell number should be determined empirically but can range from 10^5 to 10^8 cells/test.
Excitation: 488-561 nm; Emission: 578 nm; Laser: Blue Laser, Green Laser, Yellow-Green Laser.
Filtration: 0.2 µm post-manufacturing filtered.
CXCR5 (C-X-Chemokine Receptor Type 5, CD185) also known as Burkitt lymphoma receptor 1 (BLR1) belongs to the CXC chemokine receptor family. CXCR5 is a G protein-coupled seven transmembrane receptor for chemokine BLC. CXCR5 gene is specifically expressed in Burkitt's lymphoma and lymphatic tissues, such as follicles in lymph nodes, as well as in spleen. Studies of CXCR5 suggest that it plays an essential role in B cell migration. CXCR5 expression has been reported in human blood and salivary gland and in animal lymphatic organs, blood, bone marrow, brain, liver, lymph node, skin, spleen, stomach, and tonsil. ESTs (expressed sequence tags) have been isolated from human brain, germ cell, lung, lymph, and pancreas. G-protein Coupled Receptors (GPCRs) comprise one of the largest families of signaling molecules with more than a thousand members currently predicted to exist. All GPCRs share a structural motif consisting of seven membrane-spanning helices, and exist in both active and inactive forms. An array of activating ligands participate in the conformation of GPCRs which leads to signaling via G-proteins and downstream effectors. Research studies have also shown the vast series of reactions which participate in the negative regulation of GPCRs. This "turn-off" activity in GPCRs have tremendous implications for the physiological action of the cell, and continues to drive pharmacological research for new drug candidates. Two blockbuster drugs which have been developed as GPCR-targeted pharmaceuticals are Zyprexa (Eli Lilly) and Claritin (Schering-Plough) which are used in mental health and allergy applications, respectively.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Protein Aliases: Blr-1; Burkitt lymphoma receptor 1; C Cmotif chemokine; C X C motif chemokine; CC motif chemokine; CCmotif chemokine; CD185 antigen; CXC; CXC motif chemokine; GPR9; HUMSTR
Gene Aliases: BLR1; EGK_06966
Entrez Gene ID: (Rhesus monkey) 701792
Molecular Function: G-protein coupled receptor cell adhesion molecule cytokine receptor defense/immunity protein hydrolase immunoglobulin receptor superfamily immunoglobulin superfamily cell adhesion molecule phosphatase protein phosphatase receptor