Normal human peripheral blood cells were either unstimulated (blue historgam) or stimulated for 3 days with Anti-Human CD3 (Product # 16-0037) and Anti-Human CD28 (Product # 16-0289) (purple histogram). Cells were then fixed and permeabilized with the Foxp3 Fixation/Permeabilization Set (Product # 00-5523) and stained with Anti-Human CD4 FITC (Product # 11-0049) and 0.06 µg Anti-Human/Mouse IRF4 PE. CD4 positive cells were used for analysis and staining of stimulated cells with Rat IgG1 K Isotype Control PE (Product # 12-4301) (orange histogram) is included.
|Tested species reactivity||Human, Mouse|
|Host / Isotype||Rat / IgG1, kappa|
|Storage buffer||PBS, pH 7.2, with 0.1% gelatin|
|Contains||0.09% sodium azide|
|Storage Conditions||4° C, store in dark, DO NOT FREEZE!|
|Tested Applications||Dilution *|
|Flow Cytometry (Flow)||0.125 µg/test|
* Suggested working dilutions are given as a guide only. It is recommended that the user titrate the product for use in their own experiment using appropriate negative and positive controls.
Description: The monoclonal antibody 3E4 reacts with human and mouse interferon regulatory factor 4 (IRF4). IRF4 is a 52 kDa transcription factor with roles in B cell, T cell and macrophage function. In B cells, IRF4 is highly expressed in mature plasma cells and plays a crucial role in their differentiation. IRF4 has been shown to interact with PU.1 and control the transcription of many B cell-specific genes including Prdm1, which encodes Blimp1. In T cells, IRF4 has been implicated in regulatory T (Treg), Th2, Th9 and Th17 cell development and function. This transcription factor is upregulated upon T cell activation and is expressed in mature T cells. Studies have shown that IRF4 directly induces Blimp1 expression in Tregs, leading to IL-10 expression. IRF4 has also been demonstrated to be involved in macrophage polarization and regulation. Lastly, in addition to its roles in normal immune function, IRF4 expression has been reported to be upregulated in many blood-related cancers.
Applications Reported: This 3E4 antibody has been reported for use in intracellular staining followed by flow cytometric analysis.
Applications Tested: This 3E4 antibody has been tested by intracellular staining and flow cytometric analysis of stimulated normal human peripheral blood cells using the Foxp3/Transcription Factor Buffer Set (cat 00-5523) and protocol. Please see Best Protocols Section (Staining intracellular Antigens for Flow Cytometry) for staining protocol (refer to Protocol B: One-step protocol for intracellular (nuclear) proteins. This can be used at less than or equal to 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. It is recommended that the antibody be carefully titrated for optimal performance in the assay of interest.
Excitation: 488-561 nm; Emission: 578 nm; Laser: Blue Laser, Green Laser, Yellow-Green Laser
The IRF (interferon regulatory factor) family of transcription factors are characterized by an unique tryptophan pentad repeat DNA-binding domain. The IRFs are important in the regulation of interferons in response to infection by virus, and in the regulation of interferon-inducible genes. IRF4 is lymphocyte specific and negatively regulates toll-like-receptor (TLR) signaling that is central to the activation of innate and adaptive immune systems. A chromosomal translocation involving this gene and the IgH locus, t(6;14)(p25;q32), may be a cause of multiple myeloma. Alternatively spliced transcript variants have been found.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.