Opiates have potent antidiarrheal actions that are mediated in part by delta-opioid receptors (DOR). We examined DOR localization within subregions of porcine ileum, a tissue analogous to human small bowel. A partial cDNA sequence for porcine DOR was obtained after reverse transcription-polymerase chain reaction cloning of forebrain RNA; it encoded the end of transmembrane domain 1 through the beginning of transmembrane domain 7 and exhibited 93% nucleotide identity with human DOR. Positive signals for DOR mRNA were found in all subregions of the porcine ileal wall. With an antiserum recognizing an N-terminal epitope in murine DOR, DOR-like immunoreactivity was localized in neurons within myenteric and submucous ganglia, longitudinal and circular smooth muscle, and villous lamina propria. The DOR agonist [D-Ser2, Leu5, Thr6]enkephalin (DSLET) attenuated circular smooth muscle contractions in porcine ileum that were evoked by electrical stimulation of myenteric cholinergic neurons. These results are consistent with previous reports of the DOR-mediated neuromodulation that underlies the antipropulsive and antisecretory effects of opioids in the intestinal tract.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1023/a:1018877823534 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Cardiopulmonary bypass with deep hypothermic circulatory arrest results in organ-specific transcriptomic responses in pediatric swine.
Transl Res
January 2025
University of Colorado School of Public Health, Aurora, CO, Department of Biostatistics and Bioinformatics.
The organ-level molecular response to cardiac surgery with cardiopulmonary bypass (CPB) remains inadequately understood and may be heterogeneous. Here, we measured organ-specific gene expression in a piglet model of CPB with deep hypothermic circulatory arrest (DHCA). Infant piglets underwent peripheral CPB with 75min of DHCA and 6h of critical care after separation from CPB.
View Article and Find Full Text PDFDistribution and neurochemical characterisation of neurons containing neuregulin 1 in the enteric nervous system within the porcine small intestine.
J Vet Res
December 2024
Institute of Biology, College of Natural Sciences, University of Rzeszów, 35-310 Rzeszów, Poland.
Introduction: The enteric nervous system (ENS) in the wall of the gastrointestinal tract is complex and comprises many neurons, which are differentiated in terms of structure, function and neurochemistry. Neuregulin 1 (NRG 1) is one of the neuronal factors synthesised in the ENS about the distribution and functions of which relatively little is known. The present study is the first description of the distribution of NRG 1 in the ENS in various segments of the porcine small intestine.
View Article and Find Full Text PDFInvestigating the Effects of Dietary Bile Acids on Production Performance and Lipid Metabolism in Late-Phase Laying Hens.
Animals (Basel)
December 2024
Institute of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China.
Multiply adverse effects including declines in production performance and excessive fat deposition were noticed with the extension of the laying cycle in hens, which are pertinent to animal welfare and human food safety. This study aimed to investigate the effect of dietary supplementation of bile acids (BAs) on production performance and lipid metabolism in late-phase laying hens. A total of 144 70-week-old hens were distributed into three treatments with eight replicates per treatment, including the basal diet with 0 (Ctrl), 95.
View Article and Find Full Text PDFDipeptidyl peptidase 4 is a cofactor for porcine epidemic diarrhea virus infection.
Vet Microbiol
February 2025
College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China. Electronic address:
Article Synopsis
- Porcine epidemic diarrhea virus (PEDV) is extremely deadly for neonatal piglets, with a mortality rate that can reach 100%, causing significant economic losses in the pig industry.
- The study identifies dipeptidyl peptidase 4 (DPP4) as a cofactor that enhances PEDV invasion and replication by mapping its expression in various piglet tissues and showing its distribution in intestinal cells.
- Research indicates that inhibiting DPP4 reduces PEDV infection, and experiments suggest that DPP4 and PEDV interact directly, reinforcing the idea that DPP4 plays a crucial role in the virus’s ability to infect pigs.
Isatidis root polysaccharides ameliorates post-weaning diarrhea by promoting intestinal health and modulating the gut microbiota in piglets.
Vet Q
December 2025
Animal Nutritional Genome and Germplasm Innovation Research Center, College of Animal Science and Technology, Hunan Agricultural University, Changsha, China.
This study aimed to investigate the effects of dietary isatidis root polysaccharide (IRP) on diarrhea, immunity, and intestinal health in weanling piglets. Forty healthy piglets were randomly assigned to five groups receiving varying dosages of IRP. The findings indicated that different concentrations of IRP significantly reduced diarrhea scores ( < 0.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!