Results 61 to 70 of about 72,155 (213)

Naloxone antagonizes the local antihyperalgesic effect of fentanyl in burnt skin of healthy humans [PDF]

open access: yes, 2007
The aim of this study was to investigate local opioid effects in the inflamed skin of healthy human volunteers. To induce inflammation, the circular tip of a 10-mm-diameter probe was heated to 48°C and applied for 120 seconds to a site on each forearm of
Hammond, G.R.   +2 more
core   +1 more source

Social trauma and the mu-opioid system in depression [PDF]

open access: yes, 2011
The overarching thesis under investigation is that the endogenous opioid system plays a key role in depression subsequent to traumatic childhood social experiences. This is suggested by the fact that animal work indicates that mu-opioids robustly mediate
Malcolm-Smith, Susan
core  

The effect of subcutaneous naloxone on experimentally induced pain [PDF]

open access: yes, 2008
The heat pain threshold was assessed in 32 healthy participants after a mild burn on the dorsal surface of each hand, after injection of an opioid antagonist (80 μg naloxone) or vehicle alone (0.2 mL saline) into the burnt skin of 1 hand, and after ...
Hammond, G.R.   +2 more
core   +1 more source

Ancestral Vertebrate Complexity of the Opioid System [PDF]

open access: yes, 2015
The evolution of the opioid peptides and nociceptin/orphanin as well as their receptors has been difficult to resolve due to variable evolutionary rates.
Dan Larhammar   +5 more
core   +1 more source

Common Mechanisms Underlying Opioid Tolerance and Dependence and Neuropathic Pain: Role of Metabotropic Glutamate Receptors

open access: yesPain Research and Management, 2000
It has been suggested that opioid tolerance and dependence share common mechanisms with neuropathic pain. This short review deals with the role of glutamate and glutamate receptors in opioid tolerance and dependence, and neuropathic pain.
Marian E Fundytus
doaj   +1 more source

Opioid and GABAB receptors differentially couple to an adenylyl cyclase/protein kinase A downstream effector after chronic morphine treatment.

open access: yesFrontiers in Pharmacology, 2014
Opioids are intensely addictive, and cessation of their chronic use is associated with a highly aversive withdrawal syndrome. A cellular hallmark of withdrawal is an opioid sensitive protein kinase A-dependent increase in GABA transporter-1 (GAT-1 ...
Elena Elizabeth Bagley
doaj   +1 more source

Amelioration of injury-induced tissue acidosis by a nonsteroidal analgesic attenuates antinociceptive effects of the pH-dependent opioid agonist NFEPP

open access: yesScientific Reports, 2022
Opioid agonists are powerful drugs for managing pain. However, their central side effects are limiting their use and drugs with similar potency, but a lower risk profile are needed. (±)-N-(3-fluoro-1-phenethylpiperidine-4-yl)-N-phenylpropionamide (NFEPP)
Melih Ö. Celik   +4 more
doaj   +1 more source

Peripheral Opioid Receptors

open access: yesAnnals of Medicine, 1995
Recent experimental and clinical research has demonstrated that opioids can produce potent and receptor-specific analgesic effects outside the central nervous system. Opioid receptors are localized on peripheral terminals of sensory nerves and their endogenous ligands, opioid peptides, have been discovered in immune cells within inflamed tissue.
C, Stein, M, Schäfer, A H, Hassan
openaire   +2 more sources

The role of the large conductance Ca2+-activated K+ channel in adenosine receptor-mediated cytoprotection [PDF]

open access: yes, 2009
The rat embryonic cardiomyoblast-derived H9c2 cell line is increasingly used for studies into cardioprotection, as these cells display similar properties to primary cardiomyocytes.
Fretwell, Laurice V, Fretwell, LV
core  

Analgesia linked to Nav1.7 loss of function requires µ- and δ-opioid receptors [version 1; referees: 2 approved]

open access: yesWellcome Open Research, 2018
Background: Functional deletion of the Scn9a (sodium voltage-gated channel alpha subunit 9) gene encoding sodium channel Nav1.7 makes humans and mice pain-free. Opioid signalling contributes to this analgesic state.
Vanessa Pereira   +5 more
doaj   +1 more source

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