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Alexa Fluor® 488 Mouse anti-Human FoxP3 236A/E7 RUO

Alexa Fluor® 488 Mouse anti-Human FoxP3 

Clone  236A/E7   (RUO)

  • Brand BD Pharmingen™
  • Alternative Name Forkhead box protein P3; Scurfin; AIID; IPEX; JM2; DIETER; PIDX; XPID
  • Vol. Per Test 5 µl
  • Isotype Mouse BALB/c IgG1, κ
  • Reactivity Human (QC Testing) 
  • Application Intracellular staining (flow cytometry) (Routinely Tested) 
  • Immunogen Human full-length FoxP3 Recombinant Protein
  • Storage Buffer Aqueous buffered solution containing BSA and ≤0.09% sodium azide.
  • Regulatory Status RUO
Product Details Recommended Assay References

Description

The 236A/E7 antibody reacts with the human FoxP3 (Forkhead box protein P3) transcription factor, a member of the forkhead or winged helix family of transcription factors. The expression of FoxP3, also known as Scurfin, IPEX and JM2, has been found to be associated with CD4+ CD25+ regulatory T cells and represents a specific marker for these cells. Flow cytometric analysis has shown that FoxP3 is expressed by the majority of CD4+ CD25+ (high) T cells in peripheral blood while less than half of CD4+ CD25+ (intermediate) cell population are FoxP3 positive. Approximately 5-10% of peripheral CD4+ cells are CD4+ CD25+ T regulatory cells. T regulatory cells are thought to play a critical role in the control of T cell mediated autoimmunity by suppressing the proliferation and cytokine production of other T cells. To support this hypothesis, it has been found that Foxp3 is mutated in scurfy (sf) mice. Cumulative evidence suggests that the 236A/E7 antibody recognizes epitopes from both isoforms of Exon 2 alternatively-spliced variants and is located in the region between Exon 2 and the Zn/LZ domains (aa 105-235).

Format
  • Format Alexa Fluor® 488
  • Excitation Source Blue 488 nm
  • Excitation Max 495 nm
  • Emission Max 519 nm

Alexa Fluor® conjugates are highly photostable and remain fluorescent over a broad pH range. The excitation and emission maxima are nearly identical to those of FITC. However, Alexa Fluor® 488 tends to be brighter and more optimal for intracellular applications. Due to nearly identical excitation and emission properties but different spillover characteristics, FITC and Alexa Fluor® 488 cannot be used simultaneously. Alexa Fluor® 488 exhibits extraordinary photostability, which makes it highly suitable for fluorescence microscopy.

Other Formats →

Suggested Companion Products

Alexa Fluor® 488 Mouse IgG1 κ Isotype Control RUO
100 Tests Cat No: 557702

PerCP-Cy™5.5 Mouse Anti-Human CD4 L200 RUO
50 Tests Cat No: 552838

Stain Buffer (FBS) RUO
500 mL Cat No: 554656

Human FoxP3 Buffer Set RUO
100 Tests Cat No: 560098

PE Mouse Anti-Human CD25 M-A251 RUO
100 Tests Cat No: 555432

PE Mouse Anti-Human CD25 2A3 RUO (GMP)
50 Cat No: 341009

Resources & Tools
 Spectrum Viewer  Panel Designer  Spectrum Viewer  Download TDS  Regulatory Document Website
Preparation and Storage

The monoclonal antibody was purified from tissue culture supernatant or ascites by affinity chromatography. The antibody was conjugated to Alexa Fluor® 488 under optimum conditions, and unreacted Alexa Fluor® 488 was removed. Store undiluted at 4°C and protected from prolonged exposure to light. Do not freeze.

Product Notices

  1. This reagent has been pre-diluted for use at the recommended Volume per Test. We typically use 1 × 10^6 cells in a 100-µl experimental sample (a test).
  2. Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
  3. For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at www.bdbiosciences.com/colors.
  4. The Alexa Fluor®, Pacific Blue™, and Cascade Blue® dye antibody conjugates in this product are sold under license from Molecular Probes, Inc. for research use only, excluding use in combination with microarrays, or as analyte specific reagents. The Alexa Fluor® dyes (except for Alexa Fluor® 430), Pacific Blue™ dye, and Cascade Blue® dye are covered by pending and issued patents.
  5. Alexa Fluor® 488 fluorochrome emission is collected at the same instrument settings as for fluorescein isothiocyanate (FITC).
  6. Alexa Fluor® is a registered trademark of Molecular Probes, Inc., Eugene, OR.
  7. Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
  8. Source of all serum proteins is from USDA inspected abattoirs located in the United States.


Cell Preparation and Staining Procedures for Fluorochrome-Conjugated Anti-Human FoxP3 Antibody

         1. Bring the buffers to room temperature (RT) before use. Prepare working solutions of the BD Pharmingen Human FoxP3 Buffer Set

         Cat. No. 560098 (For the buffer preparation, please see the Technical Data Sheet of Cat. No. 560098 buffer instructions for details).

         2. Prepare human PBMC. Suspend the cells with BD Pharmingen™ Stain Buffer (FBS)* to ten million cells/ml.

         3. Pipette appropriate amount of surface staining reagent to the bottom of each 12 x 75 mm tube.

         4. Add 100 µl of cells per tube, vortex, incubate for 20 minutes at RT protected from light.

         5. Add 2 ml of wash buffer. Centrifuge 250 x g for 10 minutes to pellet the cells and remove wash buffer.

         6. To fix the cells, gently resuspend the cell pellet in residual volume of wash buffer and then add 2 ml of 1x Human FoxP3 Buffer A.

Vortex. Incubate for 10 minutes at RT in the dark.

         7. Centrifuge 500 x g for 5 minutes, and remove fixative. Caution: Be aware the pellet is buoyant.

         8. To wash cells, resuspend each cell pellet in 2 ml of BD Pharmingen Stain Buffer (FBS)*, and centrifuge 500 x g for 5 minutes. Remove

         wash buffer.

         9. To permeabilize the cells, gently resuspend pellet in residual volume of wash buffer and then add 0.5 ml of 1x working solution

         Human FoxP3 Buffer C to each tube. Vortex. Incubate for 30 minutes at RT protected from light.

        10. To wash cells, add 2 ml of BD Pharmingen Stain Buffer (FBS)* to each tube, centrifuge 500 x g for 5 minutes at RT. Remove buffer

         and repeat wash step. Remove buffer.

        11. Add conjugated FoxP3 antibody at appropriate concentrations to resuspend the pellet. Gently shake or vortex.

        12. Incubate for 30 minutes in the dark at RT.

        13. Repeat wash step #10.

        14. Resuspend in wash buffer and analyze immediately.

                Optional Add 300 µl of 1% formaldehyde in 1x PBS and store at 4°C. Analyze cells within 24 hours.

* We recommend using the BD Pharmingen™ Stain Buffer (FBS; Cat No. 554656) for all wash steps and covering tubes during incubation steps with caps or parafilm. We also recommend optimizing forward scatter and side scatter voltages to visualize lymphocytes as separate from debris, red cell ghosts and/or platelets before acquisition.


  1. Alvaro T, Lejeune M, Salvado MT, et al. Outcome in Hodgkin's lymphoma can be predicted from the presence of accompanying cytotoxic and regulatory T cells. Clin Cancer Res. 2005; 11(4):1467-1473. (Clone-specific: Intracellular staining (flow cytometry)). View reference

  2. Brunkow ME, Jeffery EW, Hjerrild KA, et al. Disruption of a new forkhead/winged-helix protein, scurfin, results in the fatal lymphoproliferative disorder of the scurfy mouse. Nat Genet. 2001; 27(1):68-73. (Biology: Intracellular staining (flow cytometry)). View reference

  3. Fox BC, Bignone PA, Brown PJ, Banham AH. Defense of the clone: antibody 259D effectively labels human FOXP3 in a variety of applications. Blood. 2008; 111(7):3897-3899. (Clone-specific: Intracellular staining (flow cytometry)). View reference

  4. Lennon G, Auffray C, Polymeropoulos M, Soares MB. Consortium: an integrated molecular analysis of genomes and their expression. Genomics. 1996; 33(1):151-152. (Biology: Intracellular staining (flow cytometry)). View reference

  5. Roncador G, Brown PJ, Maestre L, et al. Analysis of FOXP3 protein expression in human CD4+CD25+ regulatory T cells at the single-cell level. Eur J Immunol. 2005; 35(6):1681-1691. (Immunogen: Intracellular staining (flow cytometry)). View reference

  6. Roncador G, Garcia JF, Maestre L, et al. FOXP3, a selective marker for a subset of adult T-cell leukaemia/lymphoma. Leukemia. 2005; 19(12):2247-2253. (Clone-specific: Intracellular staining (flow cytometry)). View reference

  7. Wildin RS, Ramsdell F, Peake J, et al. X-linked neonatal diabetes mellitus, enteropathy and endocrinopathy syndrome is the human equivalent of mouse scurfy. Nat Genet. 2001; 27(1):18-20. (Biology: Intracellular staining (flow cytometry)). View reference

  8. Wolf D, Wolf AM, Rumpold H, et al. The expression of the regulatory T cell-specific forkhead box transcription factor FoxP3 is associated with poor prognosis in ovarian cancer. Clin Cancer Res. 2005; 11(23):8326-8331. (Biology: Intracellular staining (flow cytometry)). View reference

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