Measured by its ability to neutralize IL‑1 beta /IL‑1F2-induced inhibition of proliferation in the A375s2 human melanoma cell line. The Neutralization Dose (ND50) is typically 5-10 µg/mL in the presence of 0.25 ng/mL Recombinant Human IL‑1 beta /IL‑1F2.
Please Note: Optimal dilutions should be determined by each laboratory for each application.
are available in the Technical Information section on our website.
IL‑1 beta /IL‑1F2 Inhibition of Cell Proliferation and Neutralization by Human IL‑1 RI Antibody.
Recombinant Human IL‑1 beta / IL‑1F2 (Catalog # 201-LB) inhibits proliferation in the A375s2 human melanoma cell line in a dose-dependent manner (orange line). Activity elicited by Recombinant Human IL‑1 beta /IL‑1F2 (0.25 ng/mL) is neutralized (green line) by increasing concentrations of Goat Anti-Human IL‑1 RI Polyclonal Antibody (Catalog # AB‑269‑NA). The ND50 is typically 5-10 µg/mL.
Preparation and Storage
Reconstitute at 1 mg/mL in sterile PBS.
Reconstitution Buffer Available
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: IL-1 RI
Two distinct types of receptors that bind the pleiotropic cytokines IL-1 alpha and IL-1 beta have been described. The IL-1 receptor Type I is an 80 kDa transmembrane protein that is expressed predominantly by T cells, fibroblasts, and endothelial cells. IL-1 receptor Type II is a 68 kDa transmembrane protein found on B lymphocytes, neutrophils, monocytes, large granular leukocytes and endothelial cells. Both receptors are members of the immunoglobulin superfamily and show approximately 28% sequence identity in their extracellular domains. The two receptor types do not heterodimerize into a receptor complex.
An IL-1 receptor accessory protein that can heterodimerize with the Type I receptor in the presence of IL-1 alpha or IL-1 beta but not IL-1ra, was identified (1). This Type I receptor complex appears to mediate all the known IL-1 biological responses. The receptor Type II has a short cytoplasmic domain and does not transduce IL-1 signals. In addition to the membrane-bound form of IL-1 RII, a naturally-occurring soluble form of IL-1 RII has been described. It has been suggested that the Type II receptor, either as the membrane-bound or as the soluble form, serves as a decoy for IL-1 and inhibits IL-1 action by blocking the binding of IL-1 to the signaling Type I receptor complex. Recombinant IL-1 soluble receptor Type I is a potent antagonist of IL-1 action.
Greenfeder, S. et al. (1995) J. Biol. Chem. 270:13757.
Interleukin 1 Receptor I
Entrez Gene IDs:
3554 (Human); 16177 (Mouse)
CD121 antigen-like family member A; CD121a antigen; CD121a; IL-1 RI; IL1R; IL1R1; IL1RI; IL-1RI; IL1RT1; IL-1RT1; IL-1RT-1; Interleukin 1 Receptor 1; interleukin 1 receptor, type I; interleukin receptor 1; interleukin-1 receptor type 1; p80
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