Also known as: Folate receptor 4, FOLR4 FRdelta, FRd
RUO: For Research Use Only
Surface staining of BALB/c splenocytes with 0.25 µg of Rat IgG2b κ Isotype Control FITC (cat. 11-4031) (left) or 0.25 µg of Anti-Mouse FR4 FITC followed by intracellular staining with Anti-Mouse/Rat Foxp3 PE (cat. 12-5773) using the Foxp3 Staining Buffers (cat. 00-5523).
Contents: Anti-Mouse FR4 FITC Catalog Number: 11-5445 Concentration: 0.5 mg/ml Formulation: Phosphate buffered saline, pH 7.2, less than or equal to 0.09% NaN3 Storage Conditions: Store at 2-8°C. Do not freeze. Light sensitive material. Clone: eBio12A5 Host/Isotype: Rat IgG2b, κ
Product Options
Cat. No.
Size
Price
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11-5445-80
25 ug
11-5445-82
100 ug
Note: Several countries will continue to be supplied via distributors. Country specific prices may apply.
Flow Cytometry Product Notes: Test Sizes: To accommodate multicolor flow cytometry, eBioscience is in the process of reducing test size volumes from 20 µl to 5 µl. Please check your antibody vial for the recommended test size. Fluorochrome Replacements: eBioscience is in the process of replacing all Alexa Fluor® 647 conjugated products with eFluor® 660 conjugated products.
Description
The monoclonal antibody eBio12A5 recognizes FR4, also known as Folate receptor 4, FR δ and FBP3 (folate binding protein3). FR4 is a heavily glycosylated 35 kD receptor for folic acid and the physiologic circulating form of the vitamin, N5-methyltetrahydrofolate. Natural T regs have high levels of FR4 and together with CD25 can be used to distinguish natural Tregs, effector T cells, memory-like T cells and naļve T cells. FR4hi CD25hi cells are natural Tregs with high levels of Foxp3. FR4hi CD25lo cells are identified as central memory T cells which upon stimulation can proliferate and produce large amounts of IL-2. In contrast FR4lo CD25hi secrete proinflammatory cytokines such as IFNγ and IL-17 and have been characterized as effector memory T cells.
Based on co-staining studies, the epitopes recognized by eBioTH6 (cat 51-5446) and eBio12A5 are different thereby allowing functional studies with eBioTH6 to be evaluated with eBio12A5.
Applications Reported
For research use only, not for diagnostic or therapeutic use. This eBio12A5 antibody has been reported for use in flow cytometric analysis.
Applications Tested
This eBio12A5 antibody has been tested by flow cytometric analysis of mouse splenocytes. This can be used at less than or equal to 0.5 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 105 to 108 cells/test. It is recommended that the antibody be carefully titrated for optimal performance in the assay of interest.
References
Elnakat H, Ratnam M. Distribution, functionality and gene regulation of folate receptor isoforms: implications in targeted therapy.
Adv Drug Deliv Rev. 2004 Apr 29;56(8):1067-84.
Spiegelstein O, Eudy JD, Finnell RH. Identification of two putative novel folate receptor genes in humans and mouse.
Gene. 2000 Nov 27;258(1-2):117-25.
Sugimoto N, Oida T, Hirota K, Nakamura K, Nomura T, Uchiyama T, Sakaguchi S. Foxp3-dependent and -independent molecules specific for CD25+CD4+ natural regulatory T cells revealed by DNA microarray analysis.
Int Immunol. 2006 Aug;18(8):1197-209.
Yamaguchi T, Hirota K, Nagahama K, Ohkawa K, Takahashi T, Nomura T, Sakaguchi S. Control of immune response by antigen-specific regulatory T cells expressing the folate receptor. Immunity July 2007 ePub (eBio12A5 FC, IP)
