Human Integrin  beta 2/CD18 Antibody

(2 citations)   
  • Species Reactivity
    Human
  • Specificity
    Detects human Integrin beta 2/CD18 in direct ELISAs and Western blots. In direct ELISAs, no cross-reactivity with recombinant human Integrin  beta 1 or recombinant mouse Integrin  alpha 5 is observed.
  • Source
    Monoclonal Mouse IgG1 Clone # 212701
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    Mouse myeloma cell line NS0-derived recombinant human Integrin  beta 2/CD18
    Gln23-Asn700
    Accession # AAA59490
  • 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.
  • Label
    Unconjugated
Applications
  •  
    Recommended
    Concentration
    Sample
  • Western Blot
    1 µg/mL
    Recombinant Human Integrin  alpha X beta 2 (Catalog # 5755-AX) under non-reducing conditions only
  • Flow Cytometry
    2.5 µg/106 cells
    Human peripheral blood mononuclear cells
  • CyTOF-ready
    Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.
  • Immunocytochemistry
    8-25 µg/mL
    See below
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
Immunocytochemistry
Integrin  beta 2/CD18 in Human PBMCs. Integrin  beta 2/CD18 was detected in immersion fixed human peripheral blood mononuclear cells (PBMCs) using Mouse Anti-Human Integrin  beta 2/CD18 Monoclonal Antibody (Catalog # MAB1730) at 10 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Mouse IgG Secondary Antibody (red; Catalog # NL007) and counter­stained with DAPI (blue). Specific staining was localized to cell surfaces and cytoplasm. View our protocol for Fluorescent ICC Staining of Non-adherent Cells.
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: Integrin beta 2/CD18

Integrin alpha X beta 2, also called CD11c/CD18, p150/95 or complement receptor type 4 (CR4), is one of four beta 2 integrins. The non-covalent heterodimer of 150 kDa alpha X/CD11c and 95 kDa beta 2/CD18 integrin subunits is expressed on macrophages, dendritic cells and hairy cell leukemias, with lower amounts on other myeloid cells and activated B, NK and some cytotoxic T cells (1‑7). Like other integrins, alpha X beta 2 has multiple activation states (3). In the presence of divalent cations and "inside-out" signaling, alpha X beta 2 is fully active and extended. The alpha X vWFA or I-domain, which contains the adhesion sites, forms the N-terminal head region with the alpha X beta-propeller and the beta 2 vWFA domain (1, 8). In the inactive state, the heterodimer flexes in the center at the alpha X thigh and calf domains and beta 2 I-EGF domains, impeding access to adhesion sites (1). The 1088 aa human alpha X/CD11c ECD shares 70‑76% aa sequence identity with mouse, rat and canine alpha X while the 678 aa human beta 2/CD18 ECD shares 81‑83% aa sequence identity with mouse, rat, cow, dog, goat, sheep, and pig beta 2. Potential alpha X isoforms containing 719 and 725 aa (as compared to full-length 1163 aa alpha X) lack the vWFA domain and the N-terminus. Active alpha X beta 2 shares some adhesion partners with alpha M beta 2/CD11b/CD18, including complement opsonin fragment iC3b, ICAMs, vWF and fibrinogen, and is expressed on many of the same cells (4‑11). However, alpha M beta 2 activity is often constitutive, while alpha X beta 2 activity requires cell activation (4‑7). alpha X beta 2 also binds osteopontin, Thy-1, plasminogen, heparin, and proteins with abnormally exposed acidic residues (11‑16). The adhesion events are important for proliferation, degranulation, chemotactic migration, and phagocytosis of complement-opsonized particles (5, 6, 9, 11, 12, 16). Mutations of beta 2, especially in the vWFA domain, cause leukocyte adhesion deficiency (LAD-1) and susceptibility to bacterial infections (17).

  • References:
    1. Corbi, A.L. et al. (1987) EMBO J. 6:4023.
    2. Kishimoto, T.K. et al. (1987) Cell 48:681.
    3. Hynes, R.O. (2002) Cell 110:673.
    4. Arnaout, M.A. (1990) Blood 75:1037.
    5. Postigo, A.A. et al. (1991) J. Exp. Med. 174:1313.
    6. Beyer, M. et al. (2005) Respir. Res. 6:70.
    7. Nicolaou, F. et al. (2003) Blood 101:4033.
    8. Vorup-Jensen, T. et al. (2003) Proc. Natl. Acad. Sci. USA 100:1873.
    9. Bilsland, C.A.G. et al. (1994) J. Immunol. 152:4582.
    10. Pendu, R. et al. (2006) Blood 108:3746.
    11. Sadhu, C. et al. (2007) J. Leukoc. Biol. 81:1395.
    12. Schack, L. et al. (2009) J. Immunol. 182:6943.
    13. Choi, J. et al. (2005) Biochem. Biophys. Res. Commun. 331:557.
    14. Gang, J. et al. (2007) Mol. Cells 24:240.
    15. Vorup-Jensen, T. et al. (2007) J. Biol. Chem. 282:30869.
    16. Vorup-Jensen, T. et al. (2004) Proc. Natl. Acad. Sci. USA 102:1614.
    17. Kishimoto, T.K. et al. (1987) Cell 50:193.
  • Entrez Gene IDs:
    3689 (Human); 16414 (Mouse); 309684 (Rat)
  • Alternate Names:
    959 beta subunit precursor)10; CD18 antigen; CD18; CD18beta 2; cell surface adhesion glycoprotein (LFA-1; CR3; Integrin beta 2; integrin beta-2; integrin, beta 2 (antigen CD18 (p95), lymphocyte function-associated antigen 1;macrophage antigen 1 (mac-1) beta subunit); integrin, beta 2 (complement component 3 receptor 3 and 4 subunit); ITGB2; LAD; LCAMB; leukocyte cell adhesion molecule CD18; leukocyte-associated antigens CD18/11A, CD18/11B, CD18/11C; LFA-1 beta; LFA-1; MAC-1 beta; MF17; MFI7; P150; p150,95 beta
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.

2 Citations: Showing 1 - 2
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Species
Applications
Sample Type
  1. Label-free proteomics reveals decreased expression of CD18 and AKNA in peripheral CD4+ T cells from patients with Vogt-Koyanagi-Harada syndrome.
    Authors: Mao L, Yang P, Hou S
    PLoS ONE, 2011;6(1):e14616.
    Species: Human
    Sample Type: Cell Lysates
    Application: WB
  2. Aberration of CCR7 CD8 memory T cells from patients with systemic lupus erythematosus: an inducer of T helper type 2 bias of CD4 T cells.
    Authors: Sen Y, Chunsong H, Baojun H, Linjie Z, Qun L, San J, Qiuping Z, Junyan L, Zhang X, Jinquan T
    Immunology, 2004;112(2):274-89.
    Species: Human
    Sample Type: Whole Cells
    Application: Flow
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