Results 21 to 30 of about 9,562 (190)

Modification of κ-Opioid Receptor Agonist-Induced Antinociception by Diabetes in the Mouse Brain and Spinal Cord

Journal of Pharmacological Sciences, 2005
The supraspinal and spinal antinociceptive effects of several κ-opioid receptor agonists were examined in diabetic and non-diabetic mice using the tail-flick assay. The antinociception induced by intrathecal (i.t.), but not intracerebroventricular (i.c.v.
Masahiro Ohsawa, Junzo Kamei
doaj   +1 more source

Butorphanol: Effects of a Prototypical Agonist-Antagonist Analgesic on κ-Opioid Receptors

Journal of Pharmacological Sciences, 2005
The opioid analgesic, butorphanol (17-cyclobutylmethyl-3,14-dihydroxymorphinan) tartrate is a prototypical agonist-antagonist opioid analgesic agent whose potential for abuse has been the cause of litigation in the United States.
Stephen Commiskey, Lir-Wan Fan, Ing K. Ho, Rob W. Rockhold   +3 more
doaj   +1 more source

Biological Effects on μ-Receptors Affinity and Selectivity of Arylpropenyl Chain Structural Modification on Diazatricyclodecane Derivatives

Molecules, 2021
Opioid analgesics are clinically used to relieve severe pain in acute postoperative and cancer pain, and also in the long term in chronic pain. The analgesic action is mediated by μ-, δ-, and κ-receptors, but currently, with few exceptions for k-agonists,
Sandra Piras, Gabriele Murineddu, Giovanni Loriga, Antonio Carta, Enrica Battistello, Stefania Merighi, Stefania Gessi, Paola Corona, Battistina Asproni, Roberta Ibba, Veronika Temml, Daniela Schuster, Gérard Aimè Pinna   +12 more
doaj   +1 more source

Nonspecific Effects of the Selective κ-Opioid Receptor AgonistU-50,488H on Dopamine Uptake and Release in PC12 Cells

Journal of Pharmacological Sciences, 2003
: κ-Opioid receptor agonists decrease the levels of extracellular dopamine in vivo and in vitro. However, the mechanism(s) underlying these actions are unclear.
Nuannoi Chudapongse, Seong-Youl Kim, Robert E. Kramer, Ing K. Ho   +3 more
doaj   +1 more source

Role of Endogenous Opioid System in Ischemic-Induced Late Preconditioning. [PDF]

PLoS ONE, 2015
Opioid receptors (OR) are involved in myocardial late preconditioning (LPC) induced by morphine and δ1-opioid receptor (δ1-OR) agonists. The role of OR in ischemic-induced LPC is unknown.
Jan Fraessdorf, Markus W Hollmann, Iris Hanschmann, André Heinen, Nina C Weber, Benedikt Preckel, Ragnar Huhn   +6 more
doaj   +1 more source

IUPHAR Review - Bivalent and bifunctional opioid receptor ligands as novel analgesics

Pharmacological Research, 2023
Though efficacious in managing chronic, severe pain, opioid analgesics are accompanied by significant adverse effects including constipation, tolerance, dependence, and respiratory depression.
Kyle J. Rehrauer, Christopher W. Cunningham   +1 more
doaj   +1 more source

Generalization of NMDA-Receptor Antagonists to the Discriminative Stimulus Effects of κ-Opioid Receptor Agonists U-50,488H, but Not TRK-820 in Rats

Journal of Pharmacological Sciences, 2006
.: Generalizations of NMDA-receptor antagonists to the discriminative stimulus effects of κ-opioid receptor agonists in rats were examined. Phencyclidine, MK-801, and ketamine, noncompetitive NMDA-receptor antagonists, generalized to the discriminative ...
Tomohisa Mori, Mutsuko Nomura, Kazumi Yoshizawa, Hiroshi Nagase, Toshiko Sawaguchi, Minoru Narita, Tsutomu Suzuki   +6 more
doaj   +1 more source

Opioids and opioid receptors; understanding pharmacological mechanisms as a key to therapeutic advances and mitigation of the misuse crisis

BJA Open, 2023
Opioids are a mainstay in acute pain management and produce their effects and side effects (e.g., tolerance, opioid-use disorder and immune suppression) by interaction with opioid receptors.
David G. Lambert
doaj   +1 more source

Loperamide Inhibits Tachykinin NK3-Receptor-Triggered Serotonin Release Without Affecting NK2-Receptor-Triggered Serotonin Release From Guinea Pig Colonic Mucosa

Journal of Pharmacological Sciences, 2005
The effect of loperamide on tachykinin NK2- and NK3-receptor-mediated 5-HT outflow from guinea pig colonic mucosa was investigated in vitro. The selective tachykinin NK2-receptor agonist [β-Ala8]-neurokinin A4–10 (βAla-NKA) or the selective NK3-receptor ...
Shu-ichi Kojima, Masashi Ikeda, Yuichiro Kamikawa   +2 more
doaj   +1 more source

Toll-Like Receptor 4 (TLR4)/Opioid Receptor Pathway Crosstalk and Impact on Opioid Analgesia, Immune Function, and Gastrointestinal Motility

Frontiers in Immunology, 2020
Toll-like receptor 4 (TLR4) recognizes exogenous pathogen-associated molecular patterns (PAMPs) and endogenous danger-associated molecular patterns (DAMPs) and initiates the innate immune response.
Peng Zhang, Meirong Yang, Chunhua Chen, Liu Liu, Xinchuan Wei, Si Zeng   +5 more
doaj   +1 more source