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• W2156828227 endingPage "e0120195" @default.
• W2156828227 startingPage "e0120195" @default.
• W2156828227 abstract "Background and Aim The largest source of melatonin, according to animal studies, is the gastrointestinal (GI) tract but this is not yet thoroughly characterized in humans. This study aims to map the expression of melatonin and its two receptors in human GI tract and pancreas using microarray analysis and immunohistochemistry. Method Gene expression data from normal intestine and pancreas and inflamed colon tissue due to ulcerative colitis were analyzed for expression of enzymes relevant for serotonin and melatonin production and their receptors. Sections from paraffin-embedded normal tissue from 42 individuals, representing the different parts of the GI tract (n=39) and pancreas (n=3) were studied with immunohistochemistry using antibodies with specificity for melatonin, MT1 and MT2 receptors and serotonin. Results Enzymes needed for production of melatonin are expressed in both GI tract and pancreas tissue. Strong melatonin immunoreactivity (IR) was seen in enterochromaffin (EC) cells partially co-localized with serotonin IR. Melatonin IR was also seen in pancreas islets. MT1 and MT2 IR were both found in the intestinal epithelium, in the submucosal and myenteric plexus, and in vessels in the GI tract as well as in pancreatic islets. MT1 and MT2 IR was strongest in the epithelium of the large intestine. In the other cell types, both MT2 gene expression and IR were generally elevated compared to MT1. Strong MT2, IR was noted in EC cells but not MT1 IR. Changes in gene expression that may result in reduced levels of melatonin were seen in relation to inflammation. Conclusion Widespread gastroenteropancreatic expression of melatonin and its receptors in the GI tract and pancreas is in agreement with the multiple roles ascribed to melatonin, which include regulation of gastrointestinal motility, epithelial permeability as well as enteropancreatic cross-talk with plausible impact on metabolic control." @default.
• W2156828227 created "2016-06-24" @default.
• W2156828227 creator A5038352346 @default.
• W2156828227 creator A5050139717 @default.
• W2156828227 creator A5068473291 @default.
• W2156828227 date "2015-03-30" @default.
• W2156828227 modified "2023-10-04" @default.
• W2156828227 title "Human Gastroenteropancreatic Expression of Melatonin and Its Receptors MT1 and MT2" @default.
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• W2156828227 doi "https://doi.org/10.1371/journal.pone.0120195" @default.
• W2156828227 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4378860" @default.
• W2156828227 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25822611" @default.
• W2156828227 hasPublicationYear "2015" @default.
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