Description: BMS152 (B-T21) recognizes natural and recombinant human IL-12A p35/p70 but not IL-12-p40. BMS 152 blocks IL-12 induced proliferation on PHA and IL-2 activated lymphoblasts.
Biologically active IL-12 is a disulfide-linked heterodimeric 70-kDa cytokine composed of a 35-kDa (p35) and a 40-kDa (p40) subunit. p35, a member of the IL-6 superfamily, is secreted in response to IFN gamma and agonists of TLR3, 4, or 7. However, p35 expression has been shown to be inhibited by Th2 cytokines and expressed at much lower levels than p40. Expression of p40 is regulated independently of p35. Moreover, p40 has been shown to be secreted as either a monomer or homodimer. Although each subunit alone does not possess IL-12 bioactivity, the p40 homodimer can bind to the IL-12 receptor and act as an antagonist to IL-12 p70. The receptor for this cytokine is composed of two subunits, IL-12R beta 1 and IL-12R beta 2, the latter of which is the signaling component of the receptor.
Applications Tested: Functional Studies (Blocking).
Interleukin 12A is a novel signaling cytokine belonging to the Interleukin-6 protein superfamily. Interleukin-12 alpha chain precursor (IL-12A) is a 35-kD subunit of disulfide-linked heterodimer of cytokine IL-12 and has a broad array of biological activities. Reports suggest that IL-12A can act as a growth factor for activated T and NK cells and enhance the lytic activity of NK/lymphokine-activated Killer cells. IL-12A stimulates the production of IFN-gamma by resting PBMC as well as T-cell-independent induction of interferon (IFN)-gamma, and helps in the differentiation of both Th1 and Th2 cells. It is also involved in positive regulation of tyrosine phosphorylation of Stat4 protein. The signaling process of IL-12A in innate immunity requires nitric oxide synthase 2A. Along with EBI3, IL-12A forms a novel heterodimeric cytokine, designated as interleukin-35 (IL-35), that may be specifically produced by T reg cells and is required for maximal suppressive activity.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Protein Aliases: CLMF; CLMF p35; cytotoxic lymphocyte maturation factor 1, p35; Cytotoxic lymphocyte maturation factor 35 kDa subunit; IL-12 subunit p35; IL-12, subunit p35; IL-12A; IL12p35; IL35 subunit; interleukin 12, p35; interleukin 12A (natural killer cell stimulatory factor 1, cytotoxic lymphocyte maturation factor 1, p35); interleukin-12 alpha chain; Interleukin-12 subunit alpha; NF cell stimulatory factor chain 1; NFSK; NK cell stimulatory factor chain 1; NKSF1
Gene Aliases: CLMF; IL-12A; IL12A; NFSK; NKSF1; P35
UniProt ID: (Human) P29459
Entrez Gene ID: (Human) 3592