Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Cell Res. 2013 Feb;23(2):274-89. doi: 10.1038/cr.2012.174. Epub 2012 Dec 18.

miR-486 sustains NF-κB activity by disrupting multiple NF-κB-negative feedback loops.

Author information

  • 1State Key Laboratory of Oncology in Southern China, Department of Experimental Research, Cancer Center, Sun Yat-sen University, Guangzhou, Guangdong 510060, China.

Abstract

Deubiquitinases, such as CYLD, A20 and Cezanne, have emerged as important negative regulators that balance the strength and the duration of NF-κB signaling through feedback mechanisms. However, how these serial feedback loops are simultaneously disrupted in cancers, which commonly exhibit constitutively activated NF-κB, remains puzzling. Herein, we report that miR-486 directly suppresses NF-κB-negative regulators, CYLD and Cezanne, as well as multiple A20 activity regulators, including ITCH, TNIP-1, TNIP-2 and TNIP-3, resulting in promotion of ubiquitin conjugations in NF-κB signaling and sustained NF-κB activity. Furthermore, we demonstrate that upregulation of miR-486 promotes glioma aggressiveness both in vitro and in vivo through activation of NF-κB signaling pathway. Importantly, miR-486 levels in primary gliomas significantly correlate with NF-κB activation status. These findings uncover a novel mechanism for constitutive NF-κB activation in gliomas and support a functionally and clinically relevant epigenetic mechanism in cancer progression.

PMID:
23247627
[PubMed - indexed for MEDLINE]
PMCID:
PMC3567829
Free PMC Article

Images from this publication.See all images (9)Free text

Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Icon for Nature Publishing Group Icon for PubMed Central
    Loading ...
    Write to the Help Desk