Journal
FASEB JOURNAL
Volume 22, Issue 12, Pages 4085-4095Publisher
WILEY
DOI: 10.1096/fj.08-108175
Keywords
polysome-mRNA association; translation repression; K box
Categories
Funding
- National Institutes of Health [DA00564, DA01583, DA11806, DA11190, K05-DA00153, K05-DA70554, K02-DA13926]
- Minnesota Medical Foundation
- NATIONAL INSTITUTE ON DRUG ABUSE [R37DA001583, R01DA000564, R56DA000564, K02DA013926, R01DA001583, P50DA011806, K05DA070554, R01DA011190] Funding Source: NIH RePORTER
Ask authors/readers for more resources
Expression of the mu opioid receptor (MOR1) protein is regulated temporally and spatially. Although transcription of its gene has been studied extensively, regulation of MOR1 protein production at the level of translation is poorly understood. Using reporter assays, we found that the MOR1 3'-untranslated region (UTR) represses reporter expression at the post-transcriptional level. Suppression by the 3'-UTR of MOR1 is mediated through decreased mRNA association with polysomes, which requires microRNA23b (miRNA23b), a specific miRNA that is expressed in mouse brain and NS20Y mouse neuroblastoma cells. miRNA23b interacts with the MOR1 3'-UTR via a K box motif. By knocking down endogenous miRNA23b in NS20Y cells, we confirmed that miRNA23b inhibits MOR1 protein expression in vivo. This is the first study reporting a translationally repressive role for the MOR1 3'-UTR. We propose a mechanism in which miRNA23b blocks the association of MOR1 mRNA with polysomes, thereby arresting its translation and suppressing the production of MOR1 protein.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available