miR-346 controls release of TNF-α protein and stability of its mRNA in rheumatoid arthritis via tristetraprolin stabilization.
miR-346 controls release of TNF-α protein and stability of its mRNA in rheumatoid arthritis via tristetraprolin stabilization.
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DOI:
10.1371/journal.pone.0019827
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Wachsmann D
中科院分区:
文献类型:
--
作者:
Semaan N;Frenzel L;Alsaleh G;Suffert G;Gottenberg JE;Sibilia J;Pfeffer S;Wachsmann D
TNF-α is a major cytokine implicated in rheumatoid arthritis. Its expression is regulated both at the transcriptional and posttranscriptional levels and recent data demonstrated that miRNAs are implicated in TNF-α response in macrophages. LPS-activated FLS isolated from RA patients express TNF-α mRNA but not the mature protein. This prompted us to look for miRNAs which could be implicated in this anti-inflammatory effect. Using a microarray, we found two miRNAs, miR-125b and miR-939 predicted to target the 3′-UTR of TNF-α mRNA, to be up-regulated in RA FLS in response to LPS, but their repression did not restore mature TNF-α expression in FLS. We showed previously that miR-346, which is upregulated in LPS-activated FLS, inhibited Btk expression that stabilized TNF-α mRNA. Blocking miR-346 reestablished TNF-α expression in activated FLS. Interestingly, transfection of miR-346 in LPS-activated THP-1 cells inhibited TNF-α secretion. We also demonstrated that TTP, a RNA binding protein which inhibited TNF-α synthesis, is overexpressed in activated FLS and that inhibition of miR-346 decreases its expression. Conversely, transfection of miR-346 in LPS-activated THP-1 cells increased TTP mRNA expression and inhibited TNF-α release. These results indicate that miR-346 controls TNF-α synthesis by regulating TTP expression.
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DOI:
10.1073/pnas.0800137105
发表时间:
2008-03-04
影响因子:
11.1
作者:
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通讯作者:
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影响因子:
12.8
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影响因子:
3.6
作者:
Chatenay-Rivauday, C;Yamodo, I;Klein, JP
通讯作者:
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DOI:
10.1084/jem.20021845
发表时间:
2003-06-16
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Horwood NJ;Mahon T;McDaid JP;Campbell J;Mano H;Brennan FM;Webster D;Foxwell BM
通讯作者:
Foxwell BM