Abstract
Chemically distinct opioid agonists have different abilities to down-regulate opioid receptors. The present study investigated the role of Ser363 in human δ-opioid receptor down-regulation by a δ-selective peptide- and non-peptide agonist. Cyclic[D-Pen 2,D-Pen5]enkephalin (DPDPE)-mediated down-regulation was significantly attenuated by a S363A mutation. In contrast, this mutation had no effect on down-regulation by (+)-4-[(αR)-α-((2S,5R)-4-allyl-2,5- dimethyl-1-piperazinyl)-3-methoxybenzyl]N,N-diethylbenzamide (SNC80). These results demonstrate that the molecular mechanism of the human δ-opioid receptor down-regulation is agonist-specific.
Original language | English (US) |
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Pages (from-to) | 341-343 |
Number of pages | 3 |
Journal | European Journal of Pharmacology |
Volume | 485 |
Issue number | 1-3 |
DOIs | |
State | Published - Feb 6 2004 |
Keywords
- Down-regulation
- Trafficking, agonist-directed
- δ-Opioid receptor
ASJC Scopus subject areas
- Pharmacology