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Research Article Free access | 10.1172/JCI118650

Cross-regulatory roles of interleukin (IL)-12 and IL-10 in atherosclerosis.

K Uyemura, L L Demer, S C Castle, D Jullien, J A Berliner, M K Gately, R R Warrier, N Pham, A M Fogelman, and R L Modlin

Department of Medicine, University of California, School of Medicine, Los Angeles, USA.

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Department of Medicine, University of California, School of Medicine, Los Angeles, USA.

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Department of Medicine, University of California, School of Medicine, Los Angeles, USA.

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Department of Medicine, University of California, School of Medicine, Los Angeles, USA.

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Department of Medicine, University of California, School of Medicine, Los Angeles, USA.

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Department of Medicine, University of California, School of Medicine, Los Angeles, USA.

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Department of Medicine, University of California, School of Medicine, Los Angeles, USA.

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Department of Medicine, University of California, School of Medicine, Los Angeles, USA.

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Department of Medicine, University of California, School of Medicine, Los Angeles, USA.

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Department of Medicine, University of California, School of Medicine, Los Angeles, USA.

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Published May 1, 1996 - More info

Published in Volume 97, Issue 9 on May 1, 1996
J Clin Invest. 1996;97(9):2130–2138. https://doi.org/10.1172/JCI118650.
© 1996 The American Society for Clinical Investigation
Published May 1, 1996 - Version history
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Abstract

T cell cytokines are known to play a major role in determining protection and pathology in infectious disease. It has recently become clear that IL-12 is a key inducer of the type 1 T cell cytokine pattern characterized by production of IFN-gamma. Conversely, IL-10 down-regulates IL-12 production and type 1 cytokine responses. We have investigated whether IL-12 and IL-10 might be involved in a chronic inflammatory reaction, atherosclerosis. In atherosclerotic plaques, we found strong expression of IFN-gamma but not IL-4 mRNAs as compared to normal arteries. IL-12 p40 mRNA and IL-12 p70 protein were also found to be abundant in atherosclerotic plaques. IL-12 was induced in monocytes in vitro in response to highly oxidized LDL but not minimally modified LDL. The cross-regulatory role of IL-10 was indicated by the expression of IL-10 in some atherosclerotic lesions, and the demonstration that exogenous rIL-10 inhibited LDL-induced IL-12 release. These data suggest that the balance between IL-12 and IL-10 production contributes to the level of immune-mediated tissue injury in atherosclerotsis.

Version history
  • Version 1 (May 1, 1996): No description
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