Recombinant Human IL-18BP Protein, His Tag, 200 µg

Background
Interleukin-18-binding protein (IL18BP) is also known as Tadekinig-alfa, IL18BPa, which functions as an IL18 inhibitor. IL18BP is a secreted protein which contains one Ig-like C2-type (immunoglobulin-like) domain. IL18BP does not have a transmembrane domain and hence is not anchored to the cell membrane. IL18BP is strongly expressed in heart, lung, placenta and spleen. Isoform A of IL18BP binds to IL-18 and inhibits its activity. IL18BP also functions as an inhibitor of the early TH1 cytokine response. IL18BP suppresses the production of IFN-gamma resulting in reduced T-helper type 1 immune responses.

Source
Recombinant Human IL-18BP, His Tag (ILP-H5222) is expressed from human 293 cells (HEK293). It contains AA Thr 31 - Gly 194 (Accession # NP_001138529).
Predicted N-terminus: Thr 31

Molecular Characterization
This protein carries a polyhistidine tag at the C-terminus.
The protein has a calculated MW of 18.5 kDa. The protein migrates as 35-45 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.

Endotoxin
Less than 1.0 EU per μg by the LAL method.

Purity
>90% as determined by SDS-PAGE.
>90% as determined by SEC-MALS.

Formulation
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.

Reconstitution
See Certificate of Analysis for reconstitution instructions and specific concentrations.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.

Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
-20°C to -70°C for 12 months in lyophilized state;
-70^°C for 3 months under sterile conditions after reconstitution.

Clinical and Translational Updates

(1)  "Disruption of IL-18 signaling via engineered IL-18BP biologics alleviates experimental cholestatic liver disease"
Kim, Lee, Park et al
Biomed Pharmacother (2023) 167, 115587
(2)  "Production of recombinant human long-acting IL-18 binding protein: inhibitory effect on ulcerative colitis in mice"
Guo, Chen, Zeng et al
Appl Microbiol Biotechnol (2023)
(3)  "The gut microbiome changes in wild type and IL-18 knockout mice after 9.0 Gy total body irradiation"
Cui, Hull, Zizzo et al
Anim Microbiome (2023) 5 (1), 42
Showing 1-3 of 341 papers.