Human Osteopontin/OPN Fluorescein-conjugated Antibody

Catalog # Availability Size / Price Qty
IC14331F
Detection of Osteopontin/OPN in U937 Human Histiocytic Lymphoma Cell Line by Flow Cytometry.
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Citations (2)
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Human Osteopontin/OPN Fluorescein-conjugated Antibody Summary

Species Reactivity
Human
Specificity
Detects human Osteopontin in direct ELISAs and Western blots. In direct ELISAs and Western blots, this antibody does not cross‑react with recombinant mouse Osteopontin.
Source
Monoclonal Mouse IgG2A Clone # 223126
Purification
Protein A or G purified from hybridoma culture supernatant
Immunogen
Mouse myeloma cell line NS0-derived recombinant human Osteopontin
Ile17-Asn300
Accession # NP_000573.1
Formulation
Supplied in a saline solution containing BSA and Sodium Azide.
Label
Fluorescein (Excitation= 488 nm, Emission= 515-545 nm)

Applications

Recommended Concentration
Sample
Intracellular Staining by Flow Cytometry
10 µL/106 cells
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.

Scientific Data

Intracellular Staining by Flow Cytometry Detection of Osteopontin/OPN antibody in U937 Human Histiocytic Lymphoma Cell Line antibody by Flow Cytometry. View Larger

Detection of Osteopontin/OPN in U937 Human Histiocytic Lymphoma Cell Line by Flow Cytometry. U937 human histiocytic lymphoma cell line was stained with Mouse Anti-Human Osteopontin/OPN Fluorescein-conjugated Monoclonal Antibody (Catalog # IC14331F, filled histogram) or isotype control antibody (Catalog # IC003F, open histogram). View our protocol for Staining Intracellular Molecules.

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Preparation and Storage

Shipping
The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Store the unopened product at 2 - 8° C. Do not use past expiration date. Protect from light.

Background: Osteopontin/OPN

Osteopontin (OPN, previously also referred to as transformation-associated secreted phosphoprotein, bone sialoprotein I, 2ar, 2B7, early T lymphocyte activation 1 protein, minopotin, calcium oxalate crystal growth inhibitor protein), is a secreted, highly acidic, calcium-binding, RGD-containing, phosphorylated glycoprotein originally isolated from bone matrix (1). Subsequently, OPN has been found in kidney, placenta, blood vessels and various tumor tissues. Many cell types (including macrophages, osteoclasts, activated T-cells, fibroblasts, epithelial cells, vascular smooth muscle cells, and natural killer cells) can express OPN in response to activation by cytokines, growth factors or inflammatory mediators. Elevated expression of OPN has also been associated with numerous pathobiological conditions such as atherosclerotic plaques, renal tubulointerstitial fibrosis, granuloma formations in tuberculosis and silicosis, neointimal formation associated with balloon catheterization, metastasizing tumors, and cerebral ischemia. Human OPN cDNA encodes a 314 amino acid (aa) residue precursor protein with a 16 aa residue predicted signal peptide that is cleaved to yield a 298 aa residue mature protein with an integrin binding sequence (RGD), and N- and O-glycosylation sites. By alternative splicing, at least three human OPN isoforms exist. OPN has been shown to bind to different cell types through RGD-mediated interaction with the integrins alpha v beta 1, alpha v beta 3, alpha v beta 5, and non-RGD-mediated interaction with CD44 and the integrins alpha 8 beta 1 or alpha 9 beta 1. OPN exists both as a component of extracellular matrix and as a soluble molecule. Functionally, OPN is chemotactic for macrophages, smooth muscle cells, endothelial cells and glial cells. OPN has also been shown to inhibit nitric oxide production and cytotoxicity by activated macrophages. Human, mouse, rat, pig and bovine OPN share from approximately 40% - 80% amino acid sequence identity. Osteopontin is a substrate for proteolytic cleavage by thrombin, enterokinase, MMP-3 and MMP-7. The functions of OPN in a variety of cell types were shown to be modified as a result of proteolytic cleavage (2, 3).

References
  1. Ann. N.Y. Acad. Sci. (1995) 760, Apr. 21.
  2. Senger, D.R. et al. (1996) Biochim. Biophys. Acta. 1314:13.
  3. Agnihotri, R. et al. (2001) J. Biol. Chem. 276:28261.
Long Name
Secreted Phosphoprotein 1 [BNSP]
Entrez Gene IDs
6696 (Human); 20750 (Mouse); 25353 (Rat); 281499 (Bovine)
Alternate Names
BNSP; Bone sialoprotein 1; Eta-1; MGC110940; Nephropontin; OPN; Osteopontin; secreted phosphoprotein 1bone sialoprotein I, early T-lymphocyteactivation 1); secreted phosphoprotein-1 (osteopontin, bone sialoprotein); Spp1; SPP-1; SPP1/CALPHA1 fusion; Urinary stone protein; uropontin

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Citations for Human Osteopontin/OPN Fluorescein-conjugated Antibody

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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  1. Phenotypic and Histological Distribution Analysis Identify Mast Cell Heterogeneity in Non-Small Cell Lung Cancer
    Authors: E Leveque, A Rouch, C Syrykh, J Mazières, L Brouchet, S Valitutti, E Espinosa, F Lafouresse
    Cancers, 2022;14(6):.
    Species: Human
    Sample Types: Whole Cells
    Applications: Flow Cytometry
  2. Histone deacetylase inhibition with valproic acid downregulates osteocalcin gene expression in human dental pulp stem cells and osteoblasts: evidence for HDAC2 involvement.
    Authors: Paino F, La Noce M, Tirino V, Naddeo P, Desiderio V, Pirozzi G, De Rosa A, Laino L, Altucci L, Papaccio G
    Stem Cells, 2014;32(1):279-89.
    Species: Human
    Sample Types: Whole Cells
    Applications: Flow Cytometry

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