Member of the IL-1 family, IL-37 functions to curb excessive inflammation. In partnership with SMAD3, IL-37 suppresses, or reduces, proinflammatory cytokine production, including IL1A and IL6, as well as CCL12, CSF1, CSF2, CXCL13, IL1B, IL23A and IL1RN, but spares anti-inflammatory cytokines. Out of the five isoforms for IL-37 (a-e), this product represents isoform B that is expressed in testis, colon, placenta, lung and lymph node similar to isoform A and C but is the only one found in kidneys. Recombinant Human IL37/IL23 expressed in human 293 cells is a heterodimeric glycoprotein composed of two disulfide-linked subunits (p40 cystine linked to p19) with a molecular mass of 55 kDa.
<1 EU/µg of recombinant protein as determined by the LAL method
Biological Activity Comment
The EC(50) as determined by the dosedependent secretion of IL-17 in response to IL-23 using murine splenocytes was found to be ≤ 30 ng/mL.
Weight
55 kDa, heterodimer, glycosylated
Description
A quick spin of the vial followed by reconstitution in sterile 1xPBS containing 0.1% endotoxin-free recombinant human serum albumin (HSA).
Format
Lyophilized Powder1x PBS
Purity
>95% as determined by SDS-PAGE
Storage
The lyophilized protein is stable for at least one year from date of receipt at -70°C. Upon reconstitution, this cytokine can be stored in working aliquots at 2° - 8°C for one month, or at -20°C for six months. Avoid repeated freeze/thaw cycles.