Journal
FEBS LETTERS
Volume 583, Issue 12, Pages 1933-1938Publisher
WILEY
DOI: 10.1016/j.febslet.2009.04.039
Keywords
p38 Mitogen-activated protein kinase; Tristetraprolin; Interleukin-10; COX-2
Funding
- BBSRC
- GlaxoSmithKline
- MRC
- ARC
- MRC [G8623776] Funding Source: UKRI
- Medical Research Council [G8623776] Funding Source: researchfish
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p38 mitogen-activated protein kinase (MAPK) stabilises pro-inflammatory mediator mRNAs by inhibiting AU-rich element (ARE)-mediated decay. We show that in bone-marrow derived murine macrophages tristetraprolin (TTP) is necessary for the p38 MAPK-sensitive decay of several pro-inflammatory mRNAs, including cyclooxygenase-2 and the novel targets interleukin (IL)-6, and IL-1 alpha. TTP-/- macrophages also strongly overexpress IL-10, an anti-inflammatory cytokine that constrains the production of the IL-6 despite its disregulation at the post-transcriptional level. TTP directly controls IL-10 mRNA stability, which is increased and insensitive to inhibition of p38 MAPK in TTP-/- macrophages. Furthermore, TTP enhances deadenylation of an IL-10 3'-untranslated region RNA in vitro. (C) 2009 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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