نتایج جستجو برای: opioid receptor
تعداد نتایج: 613257 فیلتر نتایج به سال:
Bupivacaine is a widely used, local anesthetic agent that blocks voltage-gated Na(+) channels when used for neuro-axial blockades. Much lower concentrations of bupivacaine than in normal clinical use, < 10(-8) m, evoked Ca(2+) transients in astrocytes from rat cerebral cortex, that were inositol trisphosphate receptor-dependent. We investigated whether bupivacaine exerts an influence on the Ca...
Previous work has shown that the effect of opioid-receptor blockade on memory modulation is critically dependent upon the intensity of stress. The current study determined the effect of adrenergic-receptor blockade on memory modulation under varied levels of stress and then compared the effect of adrenergic-receptor blockade under intense stress to that of a) opioid-receptor blockade and b) con...
Opioid-induced proinflammatory glial activation modulates wide-ranging aspects of opioid pharmacology including: opposition of acute and chronic opioid analgesia, opioid analgesic tolerance, opioid-induced hyperalgesia, development of opioid dependence, opioid reward, and opioid respiratory depression. However, the mechanism(s) contributing to opioid-induced proinflammatory actions remains unre...
Opioids modulate brain dopaminergic function in various experimental paradigms. This study used the rotational model of behavior in rats with unilateral 6-hydroxydopamine-induced lesions of the nigrostriatal pathway to investigate this interaction. Doses of two presynaptically acting dopaminergic drugs, amphetamine and cocaine, were coadministered with several doses of the mu opioid agonist, mo...
Chronic pruritus is frequently refractory to currently available treatments. Studies suggest that pruritus may arise from an imbalance of the mu- and kappa-opioid receptor system activity in either the skin or the central nervous system. Stimulation of kappa-opioid receptors by their agonists inhibits pruritus in both animals and humans. The antipruritic effect of kappa-opioid receptors agonist...
Background and Purpose The μ-opioid receptor (μ receptor) is the primary target for opioid analgesics. 7-transmembrane (TM) 6TM μ isoforms mediate inhibitory excitatory cellular effects. Here, we developed compounds selective 6TM- or 7TM-μ receptors to further our understanding of pharmacodynamic properties receptors. Experimental Approach We performed virtual screening ZINC Drug Now library us...
Antagonistic properties of buprenorphine for and -opioid receptors were characterized in -endorphinand [D-Ala,NMe-Phe,Gly-ol]-enkephalin (DAMGO)-induced antinociception, respectively, with the tail-flick test in male ICR mice. -Opioid receptor agonist -endorphin (0.1–1 g), -opioid receptor agonist DAMGO (0.5–20 ng), or buprenorphine (0.1–20 g) administered i.c.v. dose dependently produced antin...
Neuropeptide FF (NPFF) is known to be an endogenous opioid-modulating peptide. Nevertheless, very few researches focused on the interaction between NPFF and endogenous opioid peptides. In the present study, we have investigated the effects of NPFF system on the supraspinal antinociceptive effects induced by the endogenous µ-opioid receptor agonists, endomorphin-1 (EM-1) and endomorphin-2 (EM-2)...
Opioid drugs produce their pharmacological effects by activating inhibitory guanine nucleotide-binding regulatory protein-linked mu, delta, and kappa opioid receptors. One major effector for these receptors is adenylyl cyclase, which is inhibited upon receptor activation. However, little is known about which of the ten known forms of adenylyl cyclase are involved in mediating opioid actions. He...
Introduction: The analgesic efficacy and side effects of opioid medications show great inter-individual differences. Genetic studies have indicated that this difference is considerably associated with the relationship between receptor. Therefore, in study it was aimed to investigate effect A118G polymorphism on postoperative tramadol consumption opioid-related side-effects after gynecological s...
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