Invitrogen

IL-21 Recombinant Rabbit Monoclonal Antibody (227)

产品信息

MA5-52385

应用

建议稀释比

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酶联免疫吸附实验 (ELISA)

1:5,000-1:10,000

产品规格

种属反应

Mouse

宿主/亚型

Rabbit / IgG

Expression System

HEK293 cells

分类

Recombinant Monoclonal

类型

Antibody

克隆号

227

抗原

Recombinant Mouse IL21 Protein (Pro25-Ser146)

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偶联物

Unconjugated Unconjugated Unconjugated

形式

Liquid

浓度

100 µg/mL

纯化类型

Protein A

保存液

PBS

内含物

no preservative

保存条件

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

运输条件

Ambient (domestic); Wet ice (international)

靶标信息

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.

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