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Cell Growth & Differentiation, Vol 3, Issue 7 421-427, Copyright © 1992 by American Association of Cancer Research

ARTICLES

Activation of NF-kappa B by interleukin 2 in human blood monocytes

MA Brach, HJ Gruss, D Riedel, R Mertelsmann and F Herrmann
Department of Hematology, University of Freiburg Medical Center, Germany.

We report here that interleukin 2 (IL-2) acts on human blood monocytes by enhancing binding activity of the transcription factor NF-kappa B to its consensus sequence in the 5' regulatory enhancer region of the IL-2 receptor alpha chain (p55). Similarly, IL-2 activates NF-kappa B in the human monocytic cell line U 937, but not in resting human T-cells. This effect is detectable within 15 min and peaks 1 h after exposure to IL-2. Enhanced NF-kappa B binding activity is followed by functional activation in that inducibility of the IL-2 receptor alpha chain is mediated by enhanced NF-kappa B binding and that a heterologous promoter containing the NF-kappa B consensus sequence (-291 to -245) of the IL-2 receptor alpha chain gene is activated. In addition, IL-2 is capable of increasing transcript levels of the p50 gene coding for the p50 subunit of the NF-kappa B transcription factor, whereas mRNA levels of the p65 NF-kappa B gene remained unchanged.


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HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Cancer Research Clinical Cancer Research
Cancer Epidemiology Biomarkers & Prevention Molecular Cancer Therapeutics
Molecular Cancer Research Cell Growth & Differentiation
Copyright © 1992 by the American Association of Cancer Research.