| First Author | Trinchieri G | Year | 1996 |
| Journal | J Leukoc Biol | Volume | 59 |
| Issue | 4 | Pages | 505-11 |
| PubMed ID | 8613697 | Mgi Jnum | J:32549 |
| Mgi Id | MGI:80043 | Doi | 10.1002/jlb.59.4.505 |
| Citation | Trinchieri G, et al. (1996) Immunoregulation by interleukin-12. J Leukoc Biol 59(4):505-11 |
| abstractText | Interleukin-12 (IL-12) is a heterodimeric cytokine produced primarily by antigen-presenting cells (monocytes, macrophages, dendritic cells, and B cells). Its production is stimulated by bacteria, bacterial products, and intracellular parasites and enhanced by priming with granulocyte-macrophage colony-stimulating factor (CM-CSF) and interferon-gamma (IFN-gamma) or inhibited by IL-10. The major biological activity of IL-12 is on T and natural killer (NK) cells in which it increases cytokine production, proliferation, and cytotoxicity. Its production occurs several hours after exposure to infections agents, which induces a rapid production of IFN-gamma by NK and later by T cells. This IFN-gamma potentiates antigen-presenting cell functions important in clearing infections agents (phagocytosis, oxidative burst, and production of nitrous oxide) and also increases further production of IL-12. IL-12 has been clearly demonstrated to be important in the generation of CD4 and CD8 type 1 T cells both in vivo and in vitro. Our data reveals that IL-12 primes naive T cells for high IFN-gamma and IL-10 production, whereas IL-4 is required for IL-4 priming, thus suggesting that these genes and possibly others are independently regulated. IL-12 is therefore involved in the skewing of cytokine production toward a type 1 and has been implicated in being involved in selective mechanisms of established T cells. It is now becoming clear that the IL-12 acts as both a proinflammatory cytokine and an immunomodulator and therefore bridges the innate and adaptive immune responses. |
