Recombinant Porcine IL-6 Protein (Catalog # 686-PI)
Measured by its ability to neutralize IL‑6-induced proliferation in the T1188.8.131.52 mouse plasmacytoma cell line [Nordan, R.P. and M. Potter (1986) Science 233:566]. The Neutralization Dose (ND50) is typically 0.15-0.6 µg/mL in the presence of 12.5 ng/mL Recombinant Porcine IL‑6.
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Cell Proliferation Induced by IL‑6 and Neutralization by Porcine IL‑6 Antibody. Recombinant Porcine IL‑6 (Catalog # 686-PI) stimulates proliferation in the T1184.108.40.206 mouse plasmacytoma cell line in a dose-dependent manner (orange line). Proliferation elicited by Recombinant Porcine IL‑6 (12.5 ng/mL) is neutralized (green line) by increasing concentrations of Goat Anti-Porcine IL‑6 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF686). The ND50 is typically 0.15-0.6 µg/mL.
Preparation and Storage
Reconstitute at 0.2 mg/mL in sterile PBS.
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
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.
Interleukin 6 (IL-6) is a pleiotropic alpha -helical cytokine that plays important roles in acute phase reactions, inflammation, hematopoiesis, bone metabolism, and cancer progression. IL-6 activity is central to the transition from acute inflammation to either acquired immunity or chronic inflammatory disease. It is secreted by multiple cell types as a 22-28 kDa phosphorylated and variably glycosylated molecule (1 - 4). Mature porcine IL-6 is 183 amino acids (aa) in length and shares 61%, 42%, and 42% aa sequence identity with human, mouse, and rat IL-6 (5). IL-6 induces signaling through a cell surface heterodimeric receptor complex composed of a ligand binding subunit (IL-6 R) and a signal transducing subunit (gp130). IL-6 binds to IL-6 R, triggering IL-6 R association with gp130 and gp130 dimerization (6). gp130 is also a component of the receptors for CLC, CNTF, CT-1, IL-11, IL-27, LIF, and OSM (7). Soluble forms of IL-6 R are generated by both alternate splicing and proteolytic cleavage (3). In a mechanism known as trans-signaling, complexes of soluble IL-6 and IL-6 R elicit responses from gp130-expressing cells that lack cell surface IL‑6 R (3). Trans-signaling enables a wider range of cell types to respond to IL-6, as the expression of gp130 is ubiquitous while that of IL-6 R is predominantly restricted to hepatocytes, leukocytes, and lymphocytes (3). Soluble splice forms of gp130 block trans-signaling from IL-6/IL-6 R but not from other cytokines that utilize gp130 as a coreceptor (4, 8).
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