IL-18 蛋白, Human

IL-18 protein is a pro-inflammatory cytokine that plays a critical role in epithelial barrier repair and polarized immune responses involving Th1 cells and NK cells. After binding to IL18R1 and IL18RAP, it forms a signaling ternary complex that activates NF-kappa-B, leading to the synthesis of inflammatory mediators. IL-18 Protein, Human is the recombinant human-derived IL-18 protein, expressed by E. coli , with tag free.

IL-18 蛋白是一种促炎细胞因子，在上皮屏障修复和协调涉及 T 辅助细胞 1 (Th1) 细胞和自然杀伤 (NK) 细胞的极化免疫反应中发挥着关键作用。IL-18 与 IL18R1 和 IL18RAP 结合后，形成信号三元复合物，激活 NF-κ-B，导致炎症介质的合成。它与 IL-12 协同作用，诱导 Th1 细胞和 NK 细胞合成 IFNG。值得注意的是，IL-18 参与细胞焦亡下游的炎症转导，其成熟形式通过gasdermin-D (GSDMD) 孔释放到细胞外环境中。在质膜上，IL-18 与配体结合受体亚基 IL18R1 和信号受体亚基 IL18RAP 形成三元复合物，启动细胞内信号传导。此外，IL-18 与货物受体 TMED10 相互作用，促进其从细胞质易位至内质网-高尔基中间室 (ERGIC) 并随后分泌。

Measured by its ability to induce IFN-gamma secretion by KG-1 human acute myelogenous leukemia cells in the presence of TNF-alpha. The ED₅₀ for this effect is ≤15.26 ng/mL in the presence of 15 ng/mL TNF-alpha, corresponding to a specific activity is ≥6.55×10⁴ U/mg.

• 
  Measured by its ability to induce IFN-gamma secretion by KG-1 human acute myelogenous leukemia cells in the presence of TNF-alpha. The ED₅₀ for this effect is 14 ng/mL in the presence of 15 ng/mL TNF-alpha, corresponding to a specific activity is 7.14×10⁴ U/mg.

Human

E. coli

Tag Free

Q14116-1 (Y37-D193)

3606  [NCBI]

YFGKLESKLSVIRNLNDQVLFIDQGNRPLFEDMTDSDCRDNAPRTIFIISMYKDSQPRGMAVTISVKCEKISTLSCENKIISFKEMNPPDNIKDTKSDIIFFQRSVPGHDNKMQFESSSYEGYFLACEKERDLFKLILKKEDELGDRSIMFTVQNED

Approximately 17-19 kDa

• 
  Greater than 95% as determined by reducing SDS-PAGE.

无菌粉末

Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4 or PBS, pH 7.4, 8% trehalose.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.