Results 1 to 10 of about 21,048 (272)
Avian opioid peptides: evolutionary considerations, functional roles and a challenge to address critical questions [PDF]
Frontiers in Physiology, 2023 The present review considers the putative hormonal opioid peptides in birds. In birds and all other vertebrates, there are four opioid related genes encoding a series of peptides.
Krystyna Pierzchała-Koziec +1 more
doaj +2 more sources
Challenges and new opportunities for detecting endogenous opioid peptides in reward [PDF]
Addiction Neuroscience, 2022 The endogenous opioid peptide system, comprised of enkephalins, endorphins, dynorphins, and nociceptin, is a highly complex neurobiological system. Opioid peptides are derived from four precursor molecules and undergo several processing events yielding ...
Sineadh M. Conway +2 more
doaj +2 more sources
Non-Opioid Peptides Targeting Opioid Effects. [PDF]
Int J Mol Sci, 2021 Opioids are the most potent widely used analgesics, primarily, but not exclusively, in palliative care. However, they are associated with numerous side effects, such as tolerance, addiction, respiratory depression, and cardiovascular events. This, in turn, can result in their overuse in cases of addiction, the need for dose escalation in cases of ...
Kaczyńska K, Wojciechowski P.
europepmc +4 more sources
Regulation of Opioid Receptors by Their Endogenous Opioid Peptides. [PDF]
Cell Mol Neurobiol, 2021 Activation of μ, δ, and κ opioid receptors by endogenous opioid peptides leads to the regulation of many emotional and physiological responses. The three major endogenous opioid peptides, β-endorphin, enkephalins, and dynorphins result from the processing of three main precursors: proopiomelanocortin, proenkephalin, and prodynorphin.
Gupta A +8 more
europepmc +3 more sources
Effects of Central Administration of Opioid Peptides, Vasotocin, Mesotocin, and Corticotrophin-Releasing Factor on Water Intake in Chicks [PDF]
The Journal of Poultry ScienceFreedom from thirst is an undeniable requirement of the poultry industry. However, the regulatory mechanisms underlying water intake in chicks are not yet fully understood.
Yuhui Zhang +4 more
doaj +2 more sources
Curr Med Chem, 2016 For decades the opioid receptors have been an attractive therapeutic target for the treatment of pain. Since the first discovery of enkephalin, approximately a dozen endogenous opioid peptides have been known to produce opioid activity and analgesia, but their therapeutics have been limited mainly due to low blood brain barrier penetration and poor ...
Remesic M, Lee YS, Hruby VJ.
europepmc +5 more sources
The atypical chemokine receptor ACKR3/CXCR7 is a broad-spectrum scavenger for opioid peptides [PDF]
Nature Communications, 2020 Opioids modulate pain, anxiety and stress by activating four subtypes of opioid receptors. The authors show that atypical chemokine receptor 3 (ACKR3) is a scavenger for various endogenous opioid peptides regulating their availability without activating ...
Max Meyrath +13 more
doaj +2 more sources
Influence of opioid peptides on human neutrophil apoptosis and activation in vitro [PDF]
Mediators of Inflammation, 2002 Background: It has been shown that cells of the immune system release opioid peptides and possess receptors for them. The concentrations of opioid peptides in the peripheral circulation rapidly increase during inflammation and acute stress response.
Zofia Sulowska +4 more
doaj +2 more sources
Opioid peptide-derived analgesics [PDF]
The AAPS Journal, 2005 Two recent developments of opioid peptide-based analgesics are reviewed. The first part of the review discusses the dermorphin-derived, cationic-aromatic tetrapeptide H-Dmt-D-Arg-Phe-Lys-NH(2) ([Dmt(1)]DALDA, where Dmt indicates 2',6'-dimethyltyrosine), which showed subnanomolar mu receptor binding affinity, extraordinary mu receptor selectivity, and ...
Peter W. Schiller
openalex +5 more sources
The Role of Endogenous Beta-Endorphin and Enkephalins in the Crosstalk Between Ethanol and Morphine [PDF]
PharmaceuticalsBackground: There is clinical concern about the combined use of alcohol and opiates. Several lines of evidence support an interaction between alcohol and the endogenous opioid system.
Andy Tseng +3 more
doaj +2 more sources