Mucosal Hallmarks in the Alimentary Canal of Northern Pike Esox lucius (Linnaeus)

Animals

Antonella Carosi¹  Massimo Lorenzoni¹  Giampaolo Bosi²  Bahram Sayyaf Dezfuli³ 

[1] Department of Cellular and Environmental Biology, University of Perugia, St. Elce di sotto 5, 06123 Perugia, Italy;Department of Health, Animal Science and Food Safety, Università degli Studi di Milano, St. Trentacoste 2, 20134 Milan, Italy;Department of Life Sciences and Biotechnology, University of Ferrara, St. Borsari 46, 44121 Ferrara, Italy;

关键词: carnivorous fish;    digestive tract;    endocrine cells;    immunofluorescence;    mucous cells;   

DOI  :  10.3390/ani10091479

来源: DOAJ

【 摘 要 】

On the basis of trophic behavior, fish are classified as herbivores, carnivores, omnivores, or detritivores. Epithelial mucous cells secrete mucin types specific to diet and digestive function. Mucus secretion is regulated mainly by molecular modulators produced by epithelial endocrine cells in response to luminal or tissue stimuli. These modulators are involved in control of food intake and digestive functions. Immunohistochemical and immunofluorescence studies were conducted on 10 adult northern pike (Esox lucius Linnaeus, 1758) from Lake Piediluco (Central Italy) to quantify distribution of sub-types of mucous and endocrine cells in alimentary mucosal epithelium. Neutral mucins predominated in the esophagus, and mixed and acidic mucins predominated in stomach and intestine. The gastric epithelium contained endocrine cells secreting somatostatin, tyrosine hydroxylase, and substance P. Mucous cells secreting neutral mucins increased in number from proximal to distal intestine, with endocrine cells containing substance P in the proximal intestine and those containing Leu-enkephalin throughout the intestine. Lectin histochemistry of gut sections revealed an abundance of N-acetyl-glucosamine and N-acetyl-galactosamine as carbohydrate residues on the mucin chain. The quantity and content of endocrine and mucous cells in the alimentary canal of E. lucius showed a direct relationship with its diet.

【 授权许可】

Unknown