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Safety Information

I1288

Sigma-Aldrich

IL28β human

recombinant, expressed in HEK 293 cells, suitable for cell culture

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About This Item

UNSPSC Code:
12352202
NACRES:
NA.77

recombinant

expressed in HEK 293 cells

Assay

≥95% (SDS-PAGE)

form

lyophilized powder

potency

≤1 ng/mL EC50 (measured in a viral resistance assay)

technique(s)

cell culture | mammalian: suitable

impurities

Endotoxin, tested

storage temp.

−20°C

General description

Recombinant human IL28β is expressed in HEK 293 cells with a calculated molecular mass of ~20 kDa. This protein is manufactured in human cells using an all-human production system, with full chemically defined ingredients and with no serum. The human cells expression system allows human-like folding, and often supports better stability of the protein in culture. The protein is produced with no artificial tags.

Biochem/physiol Actions

IL28β is a newly-discovered type III interferon, with antiviral, antiproliferative, and immunomodulatory functions. Type III IFNs share homology with IL-10 and the IL-10R2 receptor subunit, leading to the speculation that these cytokines might be evolutionarily related. It was recently found that polymorphisms in IFN-lambda-4 (another type III interferon) are associated with circulating IL28β, and higher plasma IL28β are associated with higher production of antibodies to HBV surface antigen. IL28β is associated with the extent of lupus activity, in particular with active serosal and cutaneous disease. Combined treatment with IL28β and sorafenib (a small molecule multikinase inhibitor) facilitates a synergistic effect on suppressing hepatocellular carcinoma cancer growth and promoting cell apoptosis in vitro and in vivo.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

I1288-25UG:
I1288-VAR:
I1288-BULK:

Certificates of Analysis (COA)

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David A Constant et al.
ImmunoHorizons, 6(7), 416-429 (2022-07-06)
The three types of IFN have roles in antimicrobial immunity and inflammation that must be properly balanced to maintain tissue homeostasis. For example, IFNs are elevated in the context of inflammatory bowel disease and may synergize with inflammatory cytokines such

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