Anti-IL21, Human antibody

Description:
| Description: Anti-IL21, Human antibody is designed for detecting human IL21 specifically. Based on ELISA and/or FCM, Anti-IL21, Human antibody reacts with human IL21 specifically. | Immunogen: Recombinant human IL21 | Host: Alpaca pacous | Isotype: Human IgG1 | Conjugate: Unconjugated | Specificity: Human IL21 | Purity: Recombinant Expression and Affinity purified | Concentration: 1mg/ml | Formation: Liquid, 10mM PBS (pH 7.5), 0.05% sucrose, 0.1% trehalose, 0.01% proclin300, 50% Glycerol | Storage: Store at –20 °C, (Avoid freeze / thaw cycles) | Background: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.