Regulation of the IL-12/IL-12R axis: A critical step in T-helper cell differentiation and effector function

Francesco Sinigaglia, Daniele D'Ambrosio, Paola Panina-Bordignon, Lars Rogge

Research output: Contribution to journalArticle


Interleukin (IL)-12 is required for the development of T-helper (Th) 1 cells, which have been shown to be important for protective cell-mediated immune responses against a variety of intracellular pathogens. Recent studies have clarified the sources and the regulation of IL-12 production leading to Th1 development against microbes. Expression of IL-12R is necessary for maintaining IL-12 responsiveness and controlling Th1 lineage commitment. Advances in this area have included a broader understanding of the factors involved in the regulation of the IL-12Rβ2 signaling component. Expression of this receptor subunit in humans is critically influenced by IL-12 and type I interferons. IL-12 signaling results in STAT4 activation and interferon (IFN)-γ production. Recent evidence suggests that IL-12 also modulates a number of genes involved in leukocyte trafficking. Thus, IL-12 is not only an important proinflammatory cytokine, which induces production of IFN-γ and subsequent activation of phagocytic cells but also plays a major role in regulating the migration and proper positioning of effector cells.

Original languageEnglish
Pages (from-to)65-72
Number of pages8
JournalImmunological Reviews
Publication statusPublished - 1999


ASJC Scopus subject areas

  • Immunology

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