The μ-opioid receptors (MOR) are a class of opioid receptors with a high affinity for enkephalins and beta-endorphin, but a low affinity for dynorphins...

to be the μ opioid receptor, using 3H-naloxone. That study has been widely credited as the first definitive finding of an opioid receptor, although two...

suggested however that the pain modulated by the μ-opioid receptor and that modulated by the δ-opioid receptor are distinct types, with the assertion that...

An opioid antagonist, or opioid receptor antagonist, is a receptor antagonist that acts on one or more of the opioid receptors. Naloxone and naltrexone...

relief. As a class of substances, they act on opioid receptors to produce morphine-like effects. The terms 'opioid' and 'opiate' are sometimes used interchangeably...

analogue of the synthetic opioid analgesic fentanyl. It acts as an ultrapotent and highly selective agonist of the μ-opioid receptor. Carfentanil was first...

Opioid peptides or opiate peptides are peptides that bind to opioid receptors in the brain; opiates and opioids mimic the effect of these peptides. Such...

Peripherally acting μ-opioid receptor antagonists (PAMORAs) are a class of chemical compounds that are used to reverse adverse effects caused by opioids interacting...

The κ-opioid receptor or kappa opioid receptor, abbreviated KOR or KOP for its ligand ketazocine, is a G protein-coupled receptor that in humans is encoded...

are therefore associated with fewer side effects in usual doses. μ-opioid receptor antagonists are usually well-tolerated and have no abuse potential...

act as an atypical agonist of the μ-opioid receptor with clinically negligible effects on the δ- and κ-opioid receptors. This may explain part of its antidepressant...

Nucynta among others, is an opioid analgesic of the benzenoid class with a dual mode of action as an agonist of the μ-opioid receptor and as a norepinephrine...

(~60%) with the ‘classical’ opioid receptors μ-OP (MOP), κ-OP (KOP), and δ-OP (DOP), it possesses little or no affinity for opioid peptides or morphine-like...

affecting the same signal transduction pathway. Oliceridine is a μ-opioid receptor agonist that has been described to be functionally selective towards...

opioid receptors. Naltrexone is specifically an antagonist preferentially of the μ-opioid receptor (MOR), to a lesser extent of the κ-opioid receptor...

an opioid receptor modulator, acting as a partial agonist of the μ- and κ-opioid receptors. It is a biased agonist of the μ-opioid receptor. The drug...

exogenous opioids.[citation needed] The μ-opioid receptor is responsible for the analgesic, euphoric, and adverse effects of opioids. The μ-opioid receptor is...

Buprenorphine affects different types of opioid receptors in different ways. Depending on the type of opioid receptor, it may be an agonist, partial agonist...

target of the endogenous opioid peptide dynorphin. The medication has decent selectivity for the KOR over the μ-opioid receptor (MOR) and other targets...

of action as an opioid, binding to and activating all four of the opioid receptors; it acts as a full agonist of the μ-opioid receptor (Ki = 0.7 nM; EC50...

development of tolerance triggered by receptor over-activation could be rapid. In addition to acting on the μ-opioid receptor, lofentanil has also been found...

SR-17018 is a drug which acts as a biased agonist at the μ-opioid receptor, selective for activation of the G-protein signalling pathway over β-arrestin...

active μ-opioid receptor agonist and a peripherally selective μ-, κ-, and δ-opioid receptor antagonist. Cebranopadol (GRT-6005) – non-selective μ-opioid receptor...

high specificity and affinity for the μ-opioid receptor, binding it exclusively and strongly. Bound μ-opioid receptors typically induce inhibitory effects...

appears relatively safe. Opioid withdrawal may occur if rapidly stopped. Oxycodone acts by activating the μ-opioid receptor. When taken by mouth, it has...

relatively small quantity can cause overdose. Fentanyl works by activating μ-opioid receptors. Fentanyl is sold under the brand names Actiq, Duragesic, and Sublimaze...

accumbens is rewarding, as, for example, would be true in the case of μ-opioid receptor stimulation. The blood oxygen level dependent signal (BOLD) in the...

Research thus far has primarily implicated the μ-opioid receptors (MOR) abnormal activation of NMDA receptors in the central nervous system, and long-term...

the μ-opioid receptor (MOR), antagonist/very weak partial agonist of the κ-opioid receptor (KOR), and, to a lesser extent, antagonist of the δ-opioid receptor...

liver to O-desmethyltramadol (desmetramadol), an opioid with a stronger affinity for the μ-opioid receptor. Tramadol was patented in 1972 and launched under...