IL-9 Protein, Human (sf9, His)

IL-9 protein, secreted by T-helper 2 lymphocytes, mast cells, or NKT cells, regulates immune response against parasites, intestinal permeability, and adaptive immunity. It induces differentiation of TH17 cells and mast cell proliferation through IL9R and IL2RG receptor stimulation, activating JAK1, JAK3, STAT1, STAT3, and STAT5. IL-9's diverse effects are mediated by its interaction with IL9R subunit and IL2RG. IL-9 Protein, Human (sf9, His) is the recombinant human-derived IL-9 protein, expressed by Sf9 insect cells , with C-His labeled tag. The total length of IL-9 Protein, Human (sf9, His) is 126 a.a., with molecular weight of 18-25 kDa.

IL-9 protein, a multifunctional cytokine primarily secreted by T-helper 2 lymphocytes, mast cells, or NKT cells, plays crucial roles in the immune response against parasites. Its impact extends to intestinal epithelial permeability and adaptive immunity. IL-9 further contributes to the differentiation of specific T-cell subsets, including IL-17 producing helper T-cells (TH17), and promotes the proliferation and differentiation of mast cells. Functionally, IL-9 exerts its biological effects through a receptor composed of the IL9R subunit and the signal transducing subunit IL2RG. Receptor stimulation rapidly activates JAK1 and JAK3 kinase activities, leading to STAT1, STAT3, and STAT5-mediated transcriptional programs. While the induction of differentiation genes appears to be mediated by STAT1 alone, the protection of cells from apoptosis depends on STAT3 and STAT5. IL-9 interacts with the IL9R subunit and IL2RG, forming a molecular basis for its diverse cellular effects.

Human

Sf9 insect cells

C-His

P15248 (Q19-I144)

3578  [NCBI]

18-25 kDa

Greater than 95% as determined by reducing SDS-PAGE

<1 EU/μg, determined by LAL method.