Results 211 to 220 of about 1,054,479 (288)
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Cyclization in Opioid Peptides

Current Drug Targets, 2013
Endogenous opioid peptides have been studied extensively as potential therapeutics for the treatment of pain. The major problems of using natural opioid peptides as drug candidates are their poor receptor specificity, metabolic instability and inability to reach the brain after systemic administration.
Justyna Piekielna   +3 more
openaire   +3 more sources

The Opioid Peptides [PDF]

open access: possible, 1988
The discovery of endogenous opioids has begun an intricate saga involving multiple ligands and multiple receptors that form an extensive neuronal network in both the central and peripheral nervous systems. This intricacy is reflected in the complex pharmacology and diverse physiological effects of opioids in mammals.
Robert C. A. Frederickson   +2 more
openaire   +1 more source

Biology of Opioid Peptides

Annual Review of Pharmacology and Toxicology, 1979
Opioid peptides are endogenous or synthetic peptides, with a spectrum of pharmacological activity similar to that of morphine and other narcotic agonist drugs. The designation opioid peptide can be made if (a) it produces morphine-like, naloxone reversible effects in several in vitro bioassay sys­ tems such as the guinea pig ileum (1), the cat ...
and A Beaumont, John Hughes
openaire   +2 more sources

Degradation of food-derived opioid peptides by bifidobacteria.

Beneficial Microbes, 2018
Some food-derived opioid peptides have been reported to cause diseases, such as gastrointestinal inflammation, celiac disease, and mental disorders.
Takuma Sakurai   +4 more
semanticscholar   +1 more source

Food Proteins as Source of Opioid Peptides-A Review.

Current Medicinal Chemistry, 2016
Traditional opioids, mainly alkaloids, have been used in the clinical management of pain for a number of years but are often associated with numerous side-effects including sedation, dizziness, physical dependence, tolerance, addiction, nausea, vomiting,
S. Garg, K. Nurgali, V. Mishra
semanticscholar   +1 more source

Opioid peptides in cancer

Cancer and Metastasis Reviews, 2004
Opioid and somatostatin systems are two main inhibitory systems in mammals implicated in a variety of processes from hormone secretion to the modulation of cell proliferation. Opioids and opioid receptors were found in a great diversity of primary human tumors and in various cancer cell lines.
Jakub Fichna, Anna Janecka
openaire   +3 more sources

Exogenous opioid peptides derived from food proteins and their possible uses as dietary supplements: A critical review

, 2018
Endogenous opioid peptides are neuro-hormones and neurotransmitters involved in several physiological actions such as stress reactions, nociception control, sedation, breathing tone, depression, hypotension, appetite, digestion, etc. It is now clear that
A. Stefanucci   +5 more
semanticscholar   +1 more source

Opioid and anti‐opioid peptides

Fundamental & Clinical Pharmacology, 1995
Summary— The numerous endogenous opioid peptides (β‐endorphin, enkephalins, dynorphins…) and the exogenous opioids (such as morphine) exert their effects through the activation of receptors belonging to four main types: μ, Δ, k and ε. Opioidergic neurones and opioid receptors are largely distributed centrally and peripherally. It is thus not surprising
openaire   +3 more sources

Biased Agonism of Endogenous Opioid Peptides at the μ-Opioid Receptor

Molecular Pharmacology, 2015
Biased agonism is having a major impact on modern drug discovery, and describes the ability of distinct G protein–coupled receptor (GPCR) ligands to activate different cell signaling pathways, and to result in different physiologic outcomes.
Georgina L. Thompson   +5 more
semanticscholar   +1 more source

Opioid receptors and endogenous opioid peptides [PDF]

open access: possibleMedicinal Research Reviews, 1991
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
openaire   +2 more sources

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