Neurochemical coding of enteric neurons in the guinea pig stomach

1995 ◽  
Vol 353 (2) ◽  
pp. 161-178 ◽  
Author(s):  
Michael Schemann ◽  
Cornelia Schaaf ◽  
Michael Mäder
Keyword(s):  
Guinea Pig ◽  
Enteric Neurons ◽  
Neurochemical Coding ◽  
Guinea Pig Stomach

scholarly journals Distribution and trafficking of the μ-opioid receptor in enteric neurons of the guinea pig

2016 ◽  
Vol 311 (2) ◽  
pp. G252-G266 ◽  
Author(s):  
Joslyn Lay ◽  
Simona E. Carbone ◽  
Jesse J. DiCello ◽  
Nigel W. Bunnett ◽  
Meritxell Canals ◽  
...  
Keyword(s):  
Guinea Pig ◽  
Opioid Receptor ◽  
Cholinergic Neurons ◽  
Distal Colon ◽  
Bowel Dysfunction ◽  
Enteric Neurons ◽  
Neurochemical Coding ◽  
Opioid Receptor Agonist ◽  
Μ Opioid Receptor ◽  
Δ Opioid Receptor

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-Ala2, MePhe4, 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-Ala2, d-Leu5]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.

scholarly journals Regulation of acetylcholine release from the guinea-pig stomach via 5-HT4 receptors.

1994 ◽  
Vol 64 ◽  
pp. 90
Author(s):  
Shogo Matsuyama ◽  
Hideyo Sakjyama ◽  
Koji Nei ◽  
Shigenori Katayama ◽  
Norikazu Sakamoto ◽  
...  
Keyword(s):  
Guinea Pig ◽  
Acetylcholine Release ◽  
Guinea Pig Stomach

Cell loss from human, canine and guinea-pig gastric mucosa measured by DNA radioimmunoassay

1984 ◽  
Vol 66 (6) ◽  
pp. 701-708 ◽  
Author(s):  
B. C. Hurst ◽  
W. D. W. Rees ◽  
A. Garner
Keyword(s):  
Guinea Pig ◽  
Animal Species ◽  
Colorimetric Assay ◽  
Cell Loss ◽  
Mucosal Cell ◽  
Normal Human ◽  
Dna Loss ◽  
Guinea Pig Stomach ◽  
Pavlov Pouch ◽  
Stimulation Of

1. A DNA radioimmunoassay, sensitive in the range 25–1000 ng, has been developed to measure gastric mucosal cell loss. Validity of the assay was based on antibody specificity, absence of interference from gastric contents, parallel tracer displacement by dilutions of gastric and standard DNA, and crossover with colorimetric assay. 2. With this assay, gastric DNA shedding was examined in two animal species and man. In the guinea-pig stomach, DNA loss was 20–100 pg/h and in the canine Pavlov pouch, 260–580pg/h. In the canine Pavlov pouch stimulation of acid secretion by histamine and exposure to exogenous acid increased DNA output. In the normal human stomach DNA loss was 544 k 175 pg/h and in duodenal ulcer patients, 649 k 225 pg/li. 3. DNA radioimmunoassay provides a sensitive and reproducible measure of cell exfoliation from the stomach and may be a useful tool for studying aspects of gastric mucosal defence.

Actions of cysteinyl leukotrienes in the enteric nervous system of guinea-pig stomach and small intestine

2003 ◽  
Vol 459 (1) ◽  
pp. 27-39 ◽  
Author(s):  
Sumei Liu ◽  
Hong-Zhen Hu ◽  
Chuanyun Gao ◽  
Na Gao ◽  
Guodu Wang ◽  
...  
Keyword(s):  
Nervous System ◽  
Small Intestine ◽  
Guinea Pig ◽  
Enteric Nervous System ◽  
Cysteinyl Leukotrienes ◽  
Guinea Pig Stomach

Capsaicin-induced release of substance P-like immunoreactivity from the guinea-pig stomach

1988 ◽  
Vol 22 (1-2) ◽  
pp. 156
Author(s):  
D. Renzi ◽  
P. Santicioli ◽  
C.A. Maggi ◽  
C. Surrenti ◽  
A. Calabrò ◽  
...  
Keyword(s):  
Substance P ◽  
Guinea Pig ◽  
Guinea Pig Stomach

scholarly journals Neuronal release of endogenous dopamine from corpus of guinea pig stomach

1997 ◽  
Vol 273 (5) ◽  
pp. G1044-G1050
Author(s):  
Kazuko Shichijo ◽  
Yasuko Sakurai-Yamashita ◽  
Ichiro Sekine ◽  
Kohtaro Taniyama
Keyword(s):  
Guinea Pig ◽  
Ganglion Cells ◽  
Splanchnic Nerve ◽  
Muscle Layer ◽  
Nerve Fibers ◽  
Endogenous Dopamine ◽  
Dopamine Content ◽  
Release Of Acetylcholine ◽  
Gastric Corpus ◽  
Guinea Pig Stomach

Neuronal release of endogenous dopamine was identified in mucosa-free preparations (muscle layer including intramural plexus) from guinea pig stomach corpus by measuring tissue dopamine content and dopamine release and by immunohistochemical methods using a dopamine antiserum. Dopamine content in mucosa-free preparations of guinea pig gastric corpus was one-tenth of norepinephrine content. Electrical transmural stimulation of mucosa-free preparations of gastric corpus increased the release of endogenous dopamine in a frequency-dependent (3–20 Hz) manner. The stimulated release of dopamine was prevented by either removal of external Ca2+ or treatment with tetrodotoxin. Dopamine-immunopositive nerve fibers surrounding choline acetyltransferase-immunopositive ganglion cells were seen in the myenteric plexus of whole mount preparations of gastric corpus even after bilateral transection of the splanchnic nerve proximal to the junction with the vagal nerve (section of nerves between the celiac ganglion and stomach). Domperidone and sulpiride potentiated the stimulated release of acetylcholine and reversed the dopamine-induced inhibition of acetylcholine release from mucosa-free preparations. These results indicate that dopamine is physiologically released from neurons and from possible dopaminergic nerve terminals and regulates cholinergic neuronal activity in the corpus of guinea pig stomach.

Chemical coding and electrophysiology of enteric neurons expressing neurofilament 145 in guinea pig gastrointestinal tract

2001 ◽  
Vol 442 (3) ◽  
pp. 189-203 ◽  
Author(s):  
Hong-Zhen Hu ◽  
Na Gao ◽  
Zhong Lin ◽  
Chuanyun Gao ◽  
Sumei Liu ◽  
...  
Keyword(s):  
Gastrointestinal Tract ◽  
Guinea Pig ◽  
Enteric Neurons ◽  
Chemical Coding
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