IL1RN | DIRA | IL-1ra | IL-1RN | IL1F3 | IL1RA | MVCD4 | IL1 inhibitor | IL1RN (IL1F3) | IRAP | ICIL-1RA | IL-1ra3
(tested or 100% immunogen sequence identity)
The whole rabbit serum used to produce this IgG fraction antibody was prepared by repeated immunizations with recombinant human sIL-1Ra produced in E.coli.
This antibody also detects primate IL-1Ra in the same formats using similar dilutions, but not mouse or rabbit IL-1Ra. The antibody does not recognize human IL-1a, IL-1b or IL-1 receptor type I and type II. This antibody is primarily directed against the secreted form of IL-1Ra (also termed sIL-1Ra) but recognizes the native (non-denatured) as well as denatured intracellular form of IL-1Ra (also termed icIL-1Ra). IcIL-1Ra is found in many cells as constitutively expressed protein, particularly epithelial cells and keratinocytes. This antibody does not distinguish between sIL-1Ra and icIL-1Ra in ELISA formats or by immunohistochemistry. When used in immunoblot analysis, it will recognize 17,000 MW IL-1Ra in supernatants released from supernatants or lysates of 2 x 106 endotoxin-stimulated human peripheral blood mononuclear cells (PBMC). PBMC are stimulated for 24 hours with 1% (v/v) human serum plus 10 ng/mL E.coli LPS. However, in lysates of PBMC, icIL-1Ra is also found after 48-72 hours of culture. In monocytic cells, the initial IL-1Ra transcript is for sIL-1Ra which can be found almost exclusively intracellularly.