MCB
Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrowReprints and Permissions
Right arrow Copyright Information
Right arrow Books from ASM Press
Right arrow MicrobeWorld
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Murphy, T. L.
Right arrow Articles by Murphy, K. M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Murphy, T. L.
Right arrow Articles by Murphy, K. M.

 Previous Article  |  Next Article 

Mol. Cell. Biol., 10 1995, 5258-5267, Vol 15, No. 10
Copyright © 1995, American Society for Microbiology

Regulation of interleukin 12 p40 expression through an NF-kappa B half- site

TL Murphy, MG Cleveland, P Kulesza, J Magram and KM Murphy
Department of Pathology, Washington University School of Medicine, St. Louis, Missouri 63110, USA.

Interleukin 12 (IL-12) is an inducible cytokine composed of 35- and 40- kDa subunits that is critical for promoting T helper type 1 development and cell-mediated immunity against pathogens. The 40-kDa subunit, expressed by activated macrophages and B cells, is induced by several pathogens in vivo and in vitro and is augmented or inhibited by gamma interferon (IFN-gamma) or IL-10, respectively. Control of IL-12 p40 expression is therefore important for understanding resistance and susceptibility to a variety of pathogens, including Leishmania major and perhaps human immunodeficiency virus. In this report, we provide the first characterization of IL-12 p40 gene regulation in macrophages. We localize inducible activity of the promoter to the sequence - 122GGGGAATTTTA-132 not previously recognized to bind Rel family transcription factors. We demonstrate binding of this sequence to NF- kappa B (p50/p65 and p50/c-Rel) complexes in macrophages activated by several p40-inducing pathogens and provide functional data to support a role for NF-kappa B family members in IL-12 p40 activation. Finally, we find that IFN-gamma treatment of cells enhances this binding interaction, thus potentially providing a mechanism for IFN-gamma augmentation of IL-12 production by macrophages.


This article has been cited by other articles:




Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
J. Bacteriol. J. Virol. Eukaryot. Cell
Microbiol. Mol. Biol. Rev. Clin. Vaccine Immunol. All ASM Journals

Copyright © 1995 by the American Society for Microbiology. All rights reserved.