Results 31 to 40 of about 112,812 (208)

The opioid receptor: emergence through millennia of pharmaceutical sciences

open access: yesFrontiers in Pain Research, 2023
Throughout history humanity has searched for an optimal approach to the use of opioids that maximizes analgesia while minimizing side effects. This review reflects upon the conceptualization of the opioid receptor and the critical role that the ...
Carolyn A. Fairbanks   +4 more
doaj   +1 more source

Receptors for morphine and opioids

open access: yesGeneral Pharmacology: The Vascular System, 1976
Two points concerning enzymatic systems acting on disposal of morphine are discussed, namely the multiplicity of glucuronyltransferase and the effect of nalorphine on N-demethylation of morphine. Evidences of the presence of at least two different glucuronyltransferases in microsomes of rat liver, kidney and intestine are presented. These evidences are
Sánchez, Emílio   +2 more
openaire   +4 more sources

BmK-YA, an enkephalin-like peptide in scorpion venom. [PDF]

open access: yesPLoS ONE, 2012
By screening extracts of venom from the Asian scorpion Buthus martensii Karsch (BmK) for their abilities to activate opioid receptors, we have identified BmK-YA, an amidated peptide containing an enkephalin-like sequence. BmK-YA is encoded by a precursor
Yan Zhang   +5 more
doaj   +1 more source

Modulation of Neurally Mediated Vasodepression and Bradycardia by Electroacupuncture through Opioids in Nucleus Tractus Solitarius. [PDF]

open access: yes, 2018
Stimulation of vagal afferent endings with intravenous phenylbiguanide (PBG) causes both bradycardia and vasodepression, simulating neurally mediated syncope.
Fu, Liang-Wu   +3 more
core   +3 more sources

Pharmacological Profiles of Oligomerized μ-Opioid Receptors

open access: yesCells, 2013
Opioids are widely prescribed pain relievers with multiple side effects and potential complications. They produce analgesia via G-protein-protein coupled receptors: μ-, δ-, κ-opioid and opioid receptor-like 1 receptors.
Ing-Kang Ho, Cynthia Wei-Sheng Lee
doaj   +1 more source

BU10038 as a safe opioid analgesic with fewer side-effects after systemic and intrathecal administration in primates [PDF]

open access: yes, 2019
© 2019 British Journal of Anaesthesia. Published by Elsevier Ltd. All rights reserved.Background: The marked increase in mis-use of prescription opioids has greatly affected our society. One potential solution is to develop improved analgesics which have
Cami-Kobeci, Gerta   +9 more
core   +4 more sources

Peripheral sensitization increases opioid receptor expression and activation by crotalphine in rats.

open access: yesPLoS ONE, 2014
Inflammation enhances the peripheral analgesic efficacy of opioid drugs, but the mechanisms involved in this phenomenon have not been fully elucidated. Crotalphine (CRP), a peptide that was first isolated from South American rattlesnake C.d.
Vanessa Olzon Zambelli   +6 more
doaj   +1 more source

In Vitro Analyses of Spinach-Derived Opioid Peptides, Rubiscolins: Receptor Selectivity and Intracellular Activities through G Protein- and β-Arrestin-Mediated Pathways

open access: yesMolecules, 2021
Activated opioid receptors transmit internal signals through two major pathways: the G-protein-mediated pathway, which exerts analgesia, and the β-arrestin-mediated pathway, which leads to unfavorable side effects. Hence, G-protein-biased opioid agonists
Yusuke Karasawa   +12 more
doaj   +1 more source

M3 muscarinic acetylcholine receptor facilitates the endocytosis of mu opioid receptor mediated by morphine independently of the formation of heteromeric complexes [PDF]

open access: yes, 2017
Morphine inefficiency to induce the internalization of mu opioid (MOP) receptors observed in numerous experimental models constitutes a paradigm of G-protein coupled receptor (GPCR) functional selectivity.
Alvarez-Curto, Elisa   +2 more
core   +1 more source

Molecular and cellular mechanisms of the age-dependency of opioid analgesia and tolerance

open access: yesMolecular Pain, 2012
The age-dependency of opioid analgesia and tolerance has been noticed in both clinical observation and laboratory studies. Evidence shows that many molecular and cellular events that play essential roles in opioid analgesia and tolerance are actually age-
Zhao Jing   +4 more
doaj   +1 more source

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