Thermo Fisher Scientific IL-21 Polyclonal Antibody

Applications

Tested Dilution

Publications

Western Blot (WB)

1:500-1:3,000

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Immunohistochemistry (IHC)

-

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Immunohistochemistry (Paraffin) (IHC (P))

1:100-1:1,000

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Immunohistochemistry (Frozen) (IHC (F))

-

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Product Specifications

Species Reactivity

Human

Published species

Human

Host/Isotype

Rabbit / IgG

Class

Polyclonal

Type

Antibody

Immunogen

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View immunogen .st0{fill:#FFFFFF;} .st1{fill:#1E8AE7;}

Conjugate

Unconjugated Unconjugated Unconjugated

Form

Liquid

Concentration

0.68 mg/mL

Purification

Antigen affinity chromatography

Storage buffer

PBS, pH 7, with 20% glycerol

Contains

0.025%% ProClin 300

Storage conditions

Store at 4°C short term. For long term storage, store at -20°C, avoiding freeze/thaw cycles.

Shipping conditions

Wet ice

RRID

AB_2552153

Product Specific Information

Recommended positive controls: HL-60.

Predicted reactivity: Dog (80%), Pig (80%), Sheep (82%), Rhesus Monkey (96%), Bovine (81%).

Store product as a concentrated solution. Centrifuge briefly prior to opening the vial.

Target Information

IL-21 is a 17 kDa immunomodulatory cytokine produced mainly by Natural Killer Cells (NKT), T helper (Th) 17 and T follicular helper (TFH) cells. In TFH cells, IL-21 expression leads to autocrine signaling through the IL-21 receptor (IL-21R) and STAT3, which leads to additional transcriptional activation by Bcl6. As with IFN gamma for Th1 and IL-4 for Th2 cells, IL-21 is critical for TFH cell development and effector function. IL-21 plays a role in T cell-dependent B cell differentiation into plasma cells and memory cells, stimulation of IgG production and induction of apoptotic signaling in naive B cells. In Th17 cells, IL-21 expression and autocrine feedback through STAT3, IRF4 and ROR gamma t lead to upregulation of the IL-23R, thereby preparing Th17 cells for maturation and maintenance by the inflammatory cytokine IL-23. While upregulating IRF4 and ROR gamma t, IL-21 also mediates the downregulation of Foxp3. IL-21 deficient mice are protected from developing colitis upon chemical treatment by their inability to upregulate Th17-associated molecules. In comparison, elevated levels of IL-21 are present in chemically-induced colitis mouse models.

For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.