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- W2000995800 abstract "The regulators of G-protein signaling (RGS) proteins have been shown to modulate the function of some heterotrimeric G-proteins by stimulating the GTPase activity of G-protein alpha subunits. In this study, by northern blotting analysis, we investigated the regulation of RGS4 mRNA by opioid receptor agonists in PC12 cells stably expressing either cloned mu- or kappa-opioid receptors. Treatment with respective opioid receptor agonists (mu: morphine) and [D-Ala(2), MePhe(4), Gly(ol)(5)] enkephalin (DAMGO), kappa: (+)-(5 alpha,7 alpha,8 beta)-N-methyl-N-[7-(1-pyrrolidinyl)-1-oxaspiro-(4,5)dec-8-y1]benzeneacetamide (U69,593)) for 0.5-24 h significantly and transiently increased the expression of RGS4 mRNA by 140-170% of the control level in a concentration-dependent manner which peaked when treated for 2 h, while treatment of non-transfected PC12 cells with opioid receptor agonists did not. The up-regulation of RGS4 mRNA was significantly blocked by co-treatment with respective opioid antagonists (mu: naloxone, kappa: norbinaltorphimine) or pretreatment with pertussis toxin. These results suggest that the activation of mu- or kappa-opioid receptors increases RGS4 mRNA level, which might contribute to opioid desentilization." @default.
- W2000995800 created "2016-06-24" @default.
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- W2000995800 date "2001-12-01" @default.
- W2000995800 modified "2023-09-23" @default.
- W2000995800 title "Up-regulation of RGS4 mRNA by opioid receptor agonists in PC12 cells expressing cloned μ- or κ-opioid receptors" @default.
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- W2000995800 doi "https://doi.org/10.1016/s0014-2999(01)01485-6" @default.
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