Human IFN-gamma Antibody Summary
Accession # AAP20098.1
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.
IFN-gamma in Human peripheral blood mononuclear cells (PBMCs). IFN‑ gamma was detected in immersion fixed human peripheral blood mononuclear cells (PBMCs) treated or untreated with calcium ionomycin and PMA using Rabbit Anti-Human IFN‑ gamma Monoclonal Antibody (Catalog # MAB2853) at 3 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Rabbit IgG Secondary Antibody (red; Catalog # NL004) and counterstained with DAPI (blue). Specific staining was localized to cytoplasm. View our protocol for Fluorescent ICC Staining of Cells on Coverslips.
IFN-gamma in Human Appendix. IFN‑ gamma was detected in immersion fixed paraffin-embedded sections of human appendix tissue using Rabbit Anti-Human IFN‑ gamma Monoclonal Antibody (Catalog # MAB2853) at 5 µg/mL for 1 hour at room temperature followed by incubation with the Anti-Rabbit IgG VisUCyte™ HRP Polymer Antibody (Catalog # VC003). Before incubation with the primary antibody, tissue was subjected to heat-induced epitope retrieval using Antigen Retrieval Reagent-Basic (Catalog # CTS013). Tissue was stained using DAB (brown) and counterstained with hematoxylin (blue). Specific staining was localized to cytoplasm in lymphocytes. View our protocol for IHC Staining with VisUCyte HRP Polymer Detection Reagents.
Preparation and Storage
- 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.
Interferon-gamma (IFN-gamma ), also known as type II or immune interferon, exerts a wide range of immunoregulatory activities and is considered to be the prototype proinflammatory cytokine (1, 2). Mature human IFN-gamma exists as a non-covalently linked homodimer of 20-25 kDa variably glycosylated subunits (3). It shares 90% amino acid (aa) sequence identity with rhesus IFN-gamma, 59-64% with bovine, canine, equine, feline, and porcine IFN‑ gamma, and 37-43% with cotton rat, mouse, and rat IFN-gamma. IFN-gamma dimers bind to IFN-gamma RI (alpha subunits) which then interact with IFN-gamma RII (beta subunits) to form the functional receptor complex of two alpha and two beta subunits. Inclusion of IFN-gamma RII increases the binding affinity for ligand and the efficiency of signal transduction (4, 5). IFN-gamma is produced by a variety of immune cells under inflammatory conditions, notably by T cells and NK cells (6). It plays a key role in host defense by promoting the development and activation of Th1 cells, chemoattraction and activation of monocytes and macrophages, upregulation of antigen presentation molecules, and immunoglobulin class switching in B cells. It also exhibits antiviral, antiproliferative, and apoptotic effects (6, 7). In addition, IFN-gamma functions as an anti-inflammatory mediator by promoting the development of regulatory T cells and inhibiting Th17 cell differentiation (8, 9). The pleiotropic effects of IFN-gamma contribute to the development of multiple aspects of atherosclerosis (7).
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- Gray, P.W. and D.V. Goeddel (1982) Nature 298:859.
- Marsters, S.A. et al. (1995) Proc. Natl. Acad. Sci. USA 92:5401.
- Krause, C.D. et al. (2000) J. Biol. Chem. 275:22995.
- Schroder, K. et al. (2004) J. Leukoc. Biol. 75:163.
- McLaren, J.E. and D.P. Ramji (2009) Cytokine Growth Factor Rev. 20:125.
- Muhl, H. and J. Pfeilschifter (2003) Int. Immunopharmacol. 3:1247.
- Kelchtermans, H. et al. (2008) Trends Immunol. 29:479.
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