ArticleAmerican journal of physiology. Gastrointestinal and liver physiology2016
Distribution and trafficking of the μ-opioid receptor in enteric neurons of the guinea pig.
Article in American journal of physiology. Gastrointestinal and liver physiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
What it found
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Who cites it
11 citing papers in PubMed, 28 citations in OpenAlex.
- Autonomic effects of electroacupuncture in opioid-induced constipation in male rats.Physiological reports · 2025Article
- The impact of opioid administration on the incidence of postanaesthetic colic in horses.Frontiers in pain research (Lausanne, Switzerland) · 2024Article
- Opioid Use, Gut Dysbiosis, Inflammation, and the Nervous System.Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology · 2022Review
- Chronic Morphine Induces IL-18 in Ileum Myenteric Plexus Neurons Through Mu-opioid Receptor Activation in Cholinergic and VIPergic Neurons.Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology · 2022Article
- Neurotransmitters responsible for purinergic motor neurotransmission and regulation of GI motility.Autonomic neuroscience : basic & clinical · 2021Article
- An atlas of neural crest lineages along the posterior developing zebrafish at single-cell resolution.eLife · 2021Article
- The Effect of Opiates on Bone Formation and Bone Healing.Current osteoporosis reports · 2020Review
- Mu and Delta Opioid Receptors Are Coexpressed and Functionally Interact in the Enteric Nervous System of the Mouse Colon.Cellular and molecular gastroenterology and hepatology · 2020Article
- Agonist-dependent development of delta opioid receptor tolerance in the colon.Cellular and molecular life sciences : CMLS · 2019Article
- Inflammation-associated changes in DOR expression and function in the mouse colon.American journal of physiology. Gastrointestinal and liver physiology · 2018Article
- Insights into the Role of Opioid Receptors in the GI Tract: Experimental Evidence and Therapeutic Relevance.Handbook of experimental pharmacology · 2017Review
Corrections and comments
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
Abstract
The μ-opioid receptor (MOR) is a major regulator of gastrointestinal motility and secretion and mediates opiate-induced bowel dysfunction. Although MOR is of physiological and therapeutic importance to gut function, the cellular and subcellular distribution and regulation of MOR within the enteric nervous system are largely undefined. Herein, we defined the neurochemical coding of MOR-expressing neurons in the guinea pig gut and examined the effects of opioids on MOR trafficking and regulation. MOR expression was restricted to subsets of enteric neurons. In the stomach MOR was mainly localized to nitrergic neurons (∼88%), with some overlap with neuropeptide Y (NPY) and no expression by cholinergic neurons. These neurons are likely to have inhibitory motor and secretomotor functions. MOR was restricted to noncholinergic secretomotor neurons (VIP-positive) of the ileum and distal colon submucosal plexus. MOR was mainly detected in nitrergic neurons of the colon (nitric oxide synthase positive, 87%), with some overlap with choline acetyltransferase (ChAT). No expression of MOR by intrinsic sensory neurons was detected. [d-Ala(2), MePhe(4), Gly(ol)(5)]enkephalin (DAMGO), morphiceptin, and loperamide induced MOR endocytosis in myenteric neurons. After stimulation with DAMGO and morphiceptin, MOR recycled, whereas MOR was retained within endosomes following loperamide treatment. Herkinorin or the δ-opioid receptor agonist [d-Ala(2), d-Leu(5)]enkephalin (DADLE) did not evoke MOR endocytosis. In summary, we have identified the neurochemical coding of MOR-positive enteric neurons and have demonstrated differential trafficking of MOR in these neurons in response to established and putative MOR agonists.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.