Results 41 to 50 of about 47,074 (275)

l-DOPA-Induced Dyskinesia in the Intrastriatal 6-Hydroxydopamine Model of Parkinson's Disease: Relation to Motor and Cellular Parameters of Nigrostriatal Function

open access: yesNeurobiology of Disease, 2002
In order to assess the role of striatal dopamine (DA) afferents in l-DOPA-induced dyskinesia, we have studied a large series of rats sustaining 2, 3, or 4 unilateral injections of 6-hydroxydopamine (6-OHDA) in the lateral striatum.
Christian Winkler   +3 more
doaj   +1 more source

Avian opioid peptides: evolutionary considerations, functional roles and a challenge to address critical questions

open access: yesFrontiers 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   +1 more source

The Locus Coeruleus-Noradrenergic System in the Healthy and Diseased Brain: A Narrative Review. [PDF]

open access: yesEur J Neurol
The locus coeruleus (LC) is a small brainstem nucleus that serves as the main source of noradrenaline for the central nervous system, influencing a wide range of cognitive and physiological processes. By integrating anatomical, neurochemical, and functional perspectives, this review provides a comprehensive understanding of the LC‐NA system's role in ...
Caestecker S   +5 more
europepmc   +2 more sources

Purification and characterization of enkephalin convertase, an enkephalin-synthesizing carboxypeptidase.

open access: yesJournal of Biological Chemistry, 1983
Enkephalin convertase, an enkephalin-synthesizing carboxypeptidase present in adrenal medulla chromaffin granules, has also been detected in brain and pituitary. To determine whether these three carboxypeptidase activities represent the same enzyme, we purified and characterized enkephalin convertase from adrenal medulla, whole brain, and whole ...
Lloyd D. Fricker, Solomon H. Snyder
openaire   +3 more sources

Delta Opioid Receptor Signaling Promotes Resilience to Stress Under the Repeated Social Defeat Paradigm in Mice

open access: yesFrontiers in Molecular Neuroscience, 2018
The adaptation to chronic stress is highly variable across individuals. Resilience to stress is a complex process recruiting various brain regions and neurotransmitter systems. The aim of this study was to investigate the involvement of endogenous opioid
Mathilde S. Henry   +10 more
doaj   +1 more source

Convergent, functionally independent signaling by mu and delta opioid receptors in hippocampal parvalbumin interneurons

open access: yeseLife, 2021
Functional interactions between G protein-coupled receptors are poised to enhance neuronal sensitivity to neuromodulators and therapeutic drugs. Mu and delta opioid receptors (MORs and DORs) can interact when overexpressed in the same cells, but whether ...
Xinyi Jenny He   +5 more
doaj   +1 more source

RELEASE OF VASOPRESSIN BY ENKEPHALIN [PDF]

open access: yesBritish Journal of Pharmacology, 1978
Leu‐enkephalin, its stable analogue [D‐Ala2‐D‐Leu5]‐enkephalin and the C‐fragment of lipotropin (β endorphin) injected intravenously in the rat produced anti‐diuretic responses which were inhibited reversibly by naloxone. It was shown for Leu‐enkephalin that injection into the cerebral ventricles was at least ten times more effective than intravenous ...
W. Feldberg, G. W. Bisset, H.S. Chowdrey
openaire   +3 more sources

Alterations in Cortical and Basal Ganglia Levels of Opioid Receptor Binding in a Rat Model of l-DOPA-Induced Dyskinesia

open access: yesNeurobiology of Disease, 2001
Opioid receptor-binding autoradiography was used as a way to map sites of altered opioid transmission in a rat model of l-DOPA-induced dyskinesia. Rats with unilateral 6-hydroxydopamine lesions of the nigrostriatal pathways sustained a 3-week treatment ...
P.A. Johansson   +3 more
doaj   +1 more source

The role of BDNF/TrkB signaling in acute amphetamine-induced locomotor activity and opioid peptide gene expression in the rat dorsal striatum

open access: yesFrontiers in Systems Neuroscience, 2011
Exposure to psychostimulants increases brain-derived neurotrophic factor (BDNF) mRNA and protein levels in the cerebral cortex and subcortical structures.
Jacqueline F McGinty   +3 more
doaj   +1 more source

Endogenous Opioid Levels Do Not Correlate With Itch Intensity and Therapeutic Interventions in Hepatic Pruritus

open access: yesFrontiers in Medicine, 2021
Background: Chronic pruritus affects up to 70% of patients with immune-mediated hepatobiliary disorders. Antagonists of the μ-opioid receptor (MOR) and agonists of the κ-opioid receptor (KOR) are used to treat hepatic itch, albeit with limited success ...
Miriam M. Düll   +7 more
doaj   +1 more source

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