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Human FOXP3 ELISA Kit is a Sandwich (quantitative) ELISA kit for the measurement of Human FOXP3 in Human in Plasma, Tissue Homogenate, Serum samples.

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Sandwich ELISA - Human FOXP3 ELISA Kit (AB285290), expandable thumbnail

Key facts

Detection method
Colorimetric
Sample types
Plasma, Tissue Homogenate, Serum
Assay type
Sandwich (quantitative)
Reactive species
Human
Range
0.313 - 20 ng/mL
Sensitivity
< 0.188 ng/mL

Reactivity data

Application
sELISA
Reactivity
Reacts
Dilution info
-
Notes

-

Target data

Function

Transcriptional regulator which is crucial for the development and inhibitory function of regulatory T-cells (Treg) (PubMed:17377532, PubMed:21458306, PubMed:23947341, PubMed:24354325, PubMed:24722479, PubMed:24835996, PubMed:30513302, PubMed:32644293). Plays an essential role in maintaining homeostasis of the immune system by allowing the acquisition of full suppressive function and stability of the Treg lineage, and by directly modulating the expansion and function of conventional T-cells (PubMed:23169781). Can act either as a transcriptional repressor or a transcriptional activator depending on its interactions with other transcription factors, histone acetylases and deacetylases (PubMed:17377532, PubMed:21458306, PubMed:23947341, PubMed:24354325, PubMed:24722479). The suppressive activity of Treg involves the coordinate activation of many genes, including CTLA4 and TNFRSF18 by FOXP3 along with repression of genes encoding cytokines such as interleukin-2 (IL2) and interferon-gamma (IFNG) (PubMed:17377532, PubMed:21458306, PubMed:23947341, PubMed:24354325, PubMed:24722479). Inhibits cytokine production and T-cell effector function by repressing the activity of two key transcription factors, RELA and NFATC2 (PubMed:15790681). Mediates transcriptional repression of IL2 via its association with histone acetylase KAT5 and histone deacetylase HDAC7 (PubMed:17360565). Can activate the expression of TNFRSF18, IL2RA and CTLA4 and repress the expression of IL2 and IFNG via its association with transcription factor RUNX1 (PubMed:17377532). Inhibits the differentiation of IL17 producing helper T-cells (Th17) by antagonizing RORC function, leading to down-regulation of IL17 expression, favoring Treg development (PubMed:18368049). Inhibits the transcriptional activator activity of RORA (PubMed:18354202). Can repress the expression of IL2 and IFNG via its association with transcription factor IKZF4 (By similarity).

Alternative names

What's included?

96 Test
Components
25X Wash buffer
1 x 30 mL
Antibody dilution buffer
1 x 10 mL
Biotin-Detection antibody (Concentrated)
1 x 120 µL
HRP-Streptavidin Conjugate (SABC)
1 x 120 µL
Lyophilized Standard
2 x 1 Vial
Micro ELISA Plate
1 x 1 Unit
Plate Sealer
5 x 1 Unit
SABC dilution buffer
1 x 10 mL
Sample and Standard Dilution Buffer
1 x 20 mL
Stop Solution
1 x 10 mL
TMB Substrate
1 x 10 mL

Recommended products

Human FOXP3 ELISA Kit is a Sandwich (quantitative) ELISA kit for the measurement of Human FOXP3 in Human in Plasma, Tissue Homogenate, Serum samples.

Key facts

Detection method
Colorimetric
Sample types
Plasma, Tissue Homogenate, Serum
Assay type
Sandwich (quantitative)
Reactive species
Human
Range
0.313 - 20 ng/mL
Assay Platform
Microplate (12 x 8 well strips)
Sensitivity
< 0.188 ng/mL

Storage

Shipped at conditions
Blue Ice
Appropriate short-term storage conditions
+4°C
Appropriate long-term storage conditions
+4°C
Storage information
+4°C

Notes

This FOXP3 ELISA kit (ab285290, K4224) is a sandwich ELISA assay for the quantitative measurement of human FOXP3 in serum, plasma and cell culture supernatants. The density of color is proportional to the amount of FOXP3 captured from the samples.

This product is manufactured by BioVision, an Abcam company and was previously called K4224 FOXP3 (Human) ELISA Kit. K4224-100 is the same size as the 96 test size of ab285290.

Supplementary info

This supplementary information is collated from multiple sources and compiled automatically.
Activity summary

FOXP3 also recognized as Forkhead box P3 is a transcription factor critical for immune system function. It weighs approximately 47 kDa. FOXP3 is mainly expressed in regulatory T cells (Tregs) which play a role in maintaining immune tolerance. Scientists primarily identify its presence in the nucleus where it facilitates transcriptional regulation. Methods like 'FOXP3 IHC' and 'FOXP3 IHC mouse' are useful for detecting this protein in tissue samples while 'FOXP3 antibodies' aid in research on this target. Techniques like 'FOXP3 staining' and 'FOXP3 flow cytometry' further allow for the analysis of its expression and function.

Biological function summary

This transcription factor operates by regulating the expression of a variety of genes involved in Treg cell development and function. FOXP3 can interact with other proteins to form complexes that modulate gene expression. Its role is essential in enabling Tregs to suppress immune responses a process necessary for preventing autoimmunity. The interaction extends to other key regulators within Tregs such as the protein complex 221D which may have overlapping functional responsibilities. 'FOXP3 236a/E7' reflects its genetic variants detectable in different studies providing insights into its biological functions.

Pathways

FOXP3 is a significant player within the immune regulation pathway. It integrates into the TGF-beta signaling pathway in which it controls the expression of genes important for Treg functions. The protein recruits other transcription factors like NF-kB coordinating intricate network regulations within immune cells. FOXP3's activity orchestrates the balance between immune activation and suppression ensuring a well-functioning immune response that prevents overreactions leading to autoimmune conditions.

Associated diseases and disorders

FOXP3 mutations or dysregulation can link to autoimmune diseases like immune dysregulation polyendocrinopathy enteropathy X-linked syndrome (IPEX). This transcription factor's malfunction implicates cancer where inadequate Treg function can either suppress antitumor immunity or result in tumor progression. Proteins such as CTLA-4 which is also involved in immune regulation connect to FOXP3 in these contexts emphasizing FOXP3’s significant role in maintaining immune homeostasis and its impact on disease development.

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1 product image

  • Sandwich ELISA - Human FOXP3 ELISA Kit (ab285290), expandable thumbnail

    Sandwich ELISA - Human FOXP3 ELISA Kit (ab285290)

    Human FOXP3 ELISA Kit.

    Typical Standard Curve: These standard curves are for demonstration only. A standard curve must be run with each assay.

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Product protocols

For this product, it's our understanding that no specific protocols are required. You can:

Please note: All products are 'FOR RESEARCH USE ONLY. NOT FOR USE IN DIAGNOSTIC OR THERAPEUTIC PROCEDURES'.

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