The protein encoded by this gene is a cytokine important for B and T cell development. This cytokine and the hepatocyte growth factor (HGF) form a heterodimer that functions as a pre-pro-B cell growth-stimulating factor. IL7 is found to be a cofactor for V(D)J rearrangement of the T cell receptor beta (TCRB) during early T cell development. This cytokine can be produced locally by intestinal epithelial and epithelial goblet cells, and may serve as a regulatory factor for intestinal mucosal lymphocytes. IL7 plays an essential role in lymphoid cell survival, and in the maintenance of naive and memory T cells. Alternative splicing results in multiple transcript variants encoding distinct isoforms. Additional splice variants have been described but their presence in normal tissues has not been confirmed. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection can be a potent inducer of proinflammatory cytokines and chemokines which may defend against the infection, but may also mediate destructive lung injury. Elevated serum IL7 levels, together with several other circulating cytokines and chemokines, has been found to be associated with the severity of Coronavirus Disease 19 (COVID-19).
Background References
1. Sun S. et. al. Gene fusion of IL7 involved in the regulation of idiopathic pulmonary fibrosis. Ther Adv Respir Dis. 2021 Jan-Dec
2. Perez-Witzke D. et. al. Development of a long-term, IL7 dependent cell death rescue assay in CD4+ T-cells. J Immunol Methods. 2021 Jun
Western blot analysis of IL-7 on HepG2 cell lysates with Mouse anti-IL-7 antibody (HA601048) at 1/500 dilution.
Lysates/proteins at 10 µg/Lane.
Predicted band size: 20 kDa Observed band size: 20 kDa
Exposure time: 2 minutes;
15 % SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (HA601048) at 1/500 dilution was used in 5% NFDM/TBST at room temperature for 2 hours. Goat Anti-Mouse IgG - HRP Secondary Antibody (HA1006) at 1:100,000 dilution was used for 1 hour at room temperature.
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