Human LILRB1/CD85j/ILT2 Antibody

(4 citations)   
  • Species Reactivity
    Human
  • Specificity
    Detects human LILRB1/CD85j/ILT2 in direct ELISAs and Western blots. In direct ELISAs, no cross-reactivity with recombinant human (rh) ILT1, 3, 4, 5, rhLIR-6 or rhLIR-8 is observed.
  • Source
    Monoclonal Mouse IgG2B Clone # 292319
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    Mouse myeloma cell line NS0-derived recombinant human LILRB1/CD85j/ILT2
    Gly24-His458
    Accession # Q8NHL6
  • Formulation
    Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
  • Endotoxin Level
    <0.10 EU per 1 μg of the antibody by the LAL method.
  • Label
    Unconjugated
Applications
  •  
    Recommended
    Concentration
    Sample
  • Western Blot
    1 µg/mL
    Recombinant Human LILRB1/CD85j/ILT2 Fc Chimera (Catalog # 2017-T2)
  • CyTOF-reported
    Yabu, J.M. et al. (2016) PLoS ONE 11:e0153355. Ready to be labeled using established conjugation methods. NoBSA or other carrier proteins that could interfere with conjugation.
  • Neutralization
    Measured by its ability to neutralize LILRB1/CD85j/ILT2-mediated adhesion of the HSB2 human peripheral blood acute lymphoblastic leukemia cell line. Cosman, D. et al. (1997) Immunity 7:273. The Neutralization Dose (ND50) is typically 0.025-0.15 µg/mL in the presence of 10 µg/mL Recombinant Human LILRB1/CD85j/ILT2 Fc Chimera.
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Data Examples
Cell Adhesion Mediated by LILRB1/CD85j/ILT2 and Neutralization by Human LILRB1/CD85j/ILT2 Antibody. Recombinant Human LILRB1/CD85j/ILT2 Fc Chimera (Catalog # 2017-T2), immobilized onto a microplate, supports the adhesion of the HSB2 human peripheral blood acute lymphoblastic leukemia cell line in a dose-dependent manner (orange line), as measured by acid phosphatase activity. Adhesion elicited by Recombinant Human LILRB1/CD85j/ILT2 Fc Chimera (10 µg/mL) is neutralized (green line) by increasing concentrations of Mouse Anti-Human LILRB1/CD85j/ILT2 Monoclonal Antibody (Catalog # MAB20172). The ND50 is typically 0.025‑0.15 µg/mL.

Preparation and Storage
  • Reconstitution
    Reconstitute at 0.5 mg/mL in sterile PBS.
  • Shipping
    The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
  • Stability & Storage
    Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
    • 12 months from date of receipt, -20 to -70 °C as supplied.
    • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
    • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: LILRB1/CD85j/ILT2

The immunoglobulin-like transcript (ILT) family of activating and inhibitory type immunoreceptors are expressed on many leukocyte subsets and function in the regulation of immune responses (1‑3). This family was also named leukocyte Ig-like receptors (LIR) and monocyte/macrophage Ig-like receptors (MIR). ILTs share significant homology with killer cell Ig-like receptors (KIR). The ILT genes are located on human chromosome 19q13.4 in the leukocyte receptor complex, which also include the genes encoding KIRs (4). With the exception of ILT-6, which is a soluble molecule, all ILT family members are type I transmembrane proteins having two or four extracellular Ig-like domains (2, 3). One subset of the ILT receptors (referred to as subfamily B of the LIRs) has long cytoplasmic tails containing immunoreceptor tyrosine-based inhibitory motifs (ITIMs) that inhibit signaling events by recruiting SH2-containing protein tyrosine phosphatase-1. Another subset of the ILT receptors (referred to as subfamily A of the LIRs) contains activating receptors with short cytoplasmic regions that lack signal transduction motifs. These receptors contain a basic arginine residue within their transmembrane domains, which allows association with Fc R gamma, an immunoreceptor tyrosine-based activation motif (ITAM)-bearing signal adapter protein (1‑3). ILT2, also known as LIR1, MIR7, and CD85j, is expressed on most monocytes, dendritic cells, and mature B cells (1‑3). It is also expressed on small percentages of T cells and NK cells. ILT2 has four extracellular Ig-like domains and three cytoplasmic ITIMs. It functions as an inhibitory receptor that prevents cellular activation. ILT2 has been shown to bind classical (HLA-A and -B) and nonclassical (HLA-G1, -E and -F) MHC class I molecules (MHCI) (1‑3). ILT2 also binds with high affinity to an MHC class I homologue from human cytomegalovirus (3). Ligation of ILT2 by MHC class I may function to poise cellular activation thresholds and inhibit various leukocyte effector mechanisms that are regulated by MHC class I molecules on target cells.

  • References:
    1. Allen, D. et al. (2000) Immunobiol. 202:34.
    2. Colonna, M. et al. (1999) J. Leukocyte Biol. 66:375.
    3. Borges, L. and D. Cosman (2000) Cytokine Growth Factor Rev. 11:209.
    4. Young, N. et al. (2001) Immunogenetics 53:270.
  • Long Name:
    Leukocyte Immunoglobulin-like Receptor, Subfamily A (with TM domain), Member 1
  • Entrez Gene IDs:
    10859 (Human)
  • Alternate Names:
    CD85 antigen-like family member J; CD85j antigen; CD85j; Ig-like transcript 2; ILT2; ILT-2; ILT2FLJ37515; Immunoglobulin-like transcript 2; leukocyte Ig-like receptor-1; Leukocyte immunoglobulin-like receptor 1; leukocyte immunoglobulin-like receptor subfamily B member 1 soluble isoform; leukocyte immunoglobulin-like receptor subfamily B member 1; leukocyte immunoglobulin-like receptor, subfamily B (with TM and ITIM domains); LILRB1; LIR1; LIR1LIR-1MIR-7CD85MIR7CD85 antigen; member 1; MIR7; Monocyte/macrophage immunoglobulin-like receptor 7
Related Research Areas
Citations:

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

4 Citations: Showing 1 - 4
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Species
Applications
Sample Type
  1. Barcoding of live human peripheral blood mononuclear cells for multiplexed mass cytometry.
    Authors: Mei H, Leipold M, Schulz A, Chester C, Maecker H
    J Immunol, 2015;194(4):2022-31.
    Species: Human
    Sample Type: Whole Cells
    Application: CyTof
  2. Inhibitory receptors are expressed by Trypanosoma cruzi-specific effector T cells and in hearts of subjects with chronic Chagas disease.
    Authors: Arguello RJ, Albareda MC, Alvarez MG, Bertocchi G, Armenti AH, Vigliano C, Meckert PC, Tarleton RL, Laucella SA
    PLoS ONE, 2012;7(5):e35966.
    Species: Human
    Sample Type: Whole Cells
    Application: Functional Assay
  3. Natural killer cell killing of acute myelogenous leukemia and acute lymphoblastic leukemia blasts by killer cell immunoglobulin-like receptor-negative natural killer cells after NKG2A and LIR-1 blockade.
    Authors: Godal R, Bachanova V, Gleason M
    Biol. Blood Marrow Transplant., 2010;16(5):612-21.
    Species: Human
    Sample Type: Whole Cells
    Application: Neut
  4. Expression and release of soluble HLA-E is an immunoregulatory feature of endothelial cell activation.
    Authors: Coupel S, Moreau A, Hamidou M, Horejsi V, Soulillou JP, Charreau B
    Blood, 2007;109(7):2806-14.
    Species: Human
    Sample Type: Whole Cells
    Application: Neut
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