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Post-transcriptional regulation of mu-opioid receptor: Role of the RNA-binding proteins heterogeneous nuclear ribonucleoprotein H1 and F

Title
Post-transcriptional regulation of mu-opioid receptor: Role of the RNA-binding proteins heterogeneous nuclear ribonucleoprotein H1 and F
Authors
Song K.Y.Choi H.S.Law P.-Y.Wei L.-N.Loh H.H.
Ewha Authors
최학선
Issue Date
2012
Journal Title
Cellular and Molecular Life Sciences
ISSN
1420-682XJCR Link
Citation
vol. 69, no. 4, pp. 599 - 610
Indexed
SCI; SCIE; SCOPUS scopus
Abstract
Classical opioids have been historically used for the treatment of pain and are among the most widely used drugs for both acute severe pain and long-term pain. Morphine and endogenous mu-opioid peptides exert their pharmacological actions mainly through the mu-opioid receptor (MOR). However, the expression of opioid receptor (OR) proteins is controlled by extensive transcriptional and post-transcriptional processing. Previously, the 50-untranslated region (UTR) of the mouse MOR was found to be important for post-transcriptional regulation of the MOR gene in neuronal cells. To identify proteins binding to the 50-UTR as potential regulators of the mouse MOR gene, affinity column chromatography using 50-UTR-specific RNA oligonucleotides was performed using neuroblastoma NS20Y cells. Chromatography was followed by two-dimensional gel electrophoresis and MALDI-TOF mass spectrometry. We identified two heterogeneous ribonucleoproteins (hnRNPs) that bound to RNA sequences of interest: hnRNP H1 and hnRNP F. Binding of these proteins to the RNA region was M4-region sequence-specific as confirmed by Western-blot analysis and RNA supershift assay. Furthermore, a cotransfection study showed that the presence of hnRNP H1 and F resulted in repressed expression of the mouse MOR. Our data suggest that hnRNP H1 and F can function as repressors of MOR translation dependent on the M4 (-75 to -71 bp upstream of ATG) sequences. We demonstrate for the first time a role of hnRNPs as posttranscriptional repressors in MOR gene regulation. © Springer Basel AG 2011.
DOI
10.1007/s00018-011-0761-z
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연구기관 > 의과학연구소 > Journal papers
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