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Glucocorticoids selectively inhibit the transcription of the interleukin 1. beta. gene and decrease the stability of interleukin 1. beta. mRNA

Journal Article · · Proc. Natl. Acad. Sci. U.S.A.; (United States)
Transcription of the interleukin 1..beta.. (IL-1..beta..) gene was studied by mRNA hybridization with a cDNA probe in the human promonocytic cell line U-937. Phorbol ester and lipopolysaccharide increased the steady-state level of Il-1..beta.. mRNA. Glucocorticoids markedly decreased IL-1..beta.. mRNA levels by two mechanisms. Transcription of the IL-1 gene was inhibited, as shown by in vitro transcription assays with nuclei isolated from glucocorticoid-treated cells. Moreover, kinetic analyses and pulse-labeling of mRNAs showed that glucocorticoids selectively decrease the stability of IL-1..beta.. mRNA, without affecting the stability of ..beta..-actin and FOS mRNAs. Inhibition of the formation and effects IL-1 is a mechanism by which glucocorticoids can exert antiinflammatory and immunosuppressive effects.
Research Organization:
Institute of Biological Sciences, Palo Alto, CA (USA)
OSTI ID:
6652080
Journal Information:
Proc. Natl. Acad. Sci. U.S.A.; (United States), Journal Name: Proc. Natl. Acad. Sci. U.S.A.; (United States) Vol. 85:4; ISSN PNASA
Country of Publication:
United States
Language:
English

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