The Recombinant Human IL-18 Protein is a biologically active recombinant protein that plays a significant role in various cellular processes and signaling pathways in human biology. This protein is widely employed in immunological research, cell biology studies, protein-protein interaction analyses, and therapeutic development, providing researchers with a reliable tool for investigating IL-18 function and its implications in health and disease.
This product (SKU: RPCB0147) is produced using E. coli and features a No tag tag for convenient detection and purification. The protein exhibits a calculated molecular weight of 18.22 kDa with an observed molecular weight of 18 kDa under denaturing conditions, achieving ≥ 95 % as determined by SDS-PAGE.. Functional bioactivity has been validated through rigorous quality control assays, confirming its suitability for demanding research applications.
High quality, high purity and low endotoxin recombinant Recombinant Human IL-18 Protein (RPCB0147), tested reactivity in E. coli and has been validated in SDS-PAGE.100% guaranteed.
Endotoxin:
< 0.1 EU/μg of the protein by LAL method.
Purity:
≥ 95 % as determined by SDS-PAGE.
Formulation:
Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.4.Contact us for customized product form or formulation.
Bio-Activity:
Measured by its binding ability in a functional ELISA. Immobilized recombinant Human IL18 at 5 μg/mL (100μL/well) can bind recombinant Human IL18BPa with a linear range of 0.156-1.372 μg/mL.
Measured by its ability to induce IFN-gamma secretion by KG 1 human acute myelogenous leukemia cells in the presence of TNF-alpha(RPCB0146). The ED 50 for this effect is 1.44-5.76 ng/mL, corresponding to a specific activity of 1.7×10 5 ~6.9×10 5 units/mg.
Reconstitution:
Centrifuge the vial before opening. Reconstitute to a concentration of 0.1-0.5 mg/mL in sterile distilled water. Avoid vortex or vigorously pipetting the protein. For long term storage, it is recommended to add a carrier protein or stablizer (e.g. 0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose), and aliquot the reconstituted protein solution to minimize free-thaw cycles.
Storage:
Store at -20℃.Store the lyophilized protein at -20℃ to -80 ℃ up to 1 year from the date of receipt. After reconstitution, the protein solution is stable at -20℃ for 3 months, at 2-8℃ for up to 1 week.
Interleukin-18 (IL-18, also known as interferon-gamma inducing factor) is a proinflammatory cytokine that belongs to the IL-1 superfamily and is produced by macrophages and other cells. IL-18 activation is induced by infection or tissue damage and contributes to disease pathology in chronic inflammation. In the presence of IL-12 or IL-15, IL-18 enhances anti-viral Th1 immune responses by inducing IFN-gamma production and the cytolytic activity of CD8+ T cells and NK cells. In the absence of IL-12 or IL-15, however, IL-18 promotes production of the Th2 cytokines IL-4 and IL-13 by CD4+ T cells and basophils. In the presence of IL-1 beta or IL-23, IL-18 induces the antigen-independent production of IL-17 by gamma δ T cells and CD4+ T cells.IL-18 also promotes myeloid dendritic cell maturation and triggers neutrophil respiratory burst.In cancer, IL-18 exhibits diverse activities including enhancing anti-tumor immunity, inhibiting or promoting angiogenesis, and promoting tumor cell metastasis.
Recombinant Human IL-18 Protein was determined by SDS-PAGE under reducing conditions with Coomassie Blue.
Immobilized recombinant Human IL18 at 5μg/mL (100μL/well) can bind recombinant Human IL18BPa with a linear range of 0.156-1.372μg/mL.
