Cytochemical features of the digestive tract mucosa of Hemisorubim platyrhynchos (Siluriformes: Pimelodidae).

Autor: Faccioli CK; Federal University of Uberlândia - UFU, Institute of Biomedical Sciences, Department of Human Anatomy, 1720 Pará Avenue, 38, 400-902, Uberlândia, MG, Brazil.; São Paulo State University - UNESP, Institute of Biosciences, Letter and Exact Sciences, Post-Graduate Program in Animal Biology, 2265 Cristovão Colombo Street, 15054-000, São José do Rio Preto, SP, Brazil., Chedid RA; São Paulo State University - UNESP, Aquaculture Center of UNESP - CAUNESP, Post-Graduate Program in Aquaculture, Via de Acesso Professor Paulo Donato Castellane s/n, 14884-900, Jaboticabal, SP, Brazil., Mori RH; São Paulo State University - UNESP, Aquaculture Center of UNESP - CAUNESP, Post-Graduate Program in Aquaculture, Via de Acesso Professor Paulo Donato Castellane s/n, 14884-900, Jaboticabal, SP, Brazil., do Amaral AC; São Paulo State University - UNESP, Department of Biological Sciences, School of Sciences, 14-01 Engenheiro Luiz Edmundo Carrijo Coube Avenue, 17033-360, Bauru, SP, Brazil., Vicentini IBF; São Paulo State University - UNESP, Department of Biological Sciences, School of Sciences, 14-01 Engenheiro Luiz Edmundo Carrijo Coube Avenue, 17033-360, Bauru, SP, Brazil., Vicentini CA; São Paulo State University - UNESP, Department of Biological Sciences, School of Sciences, 14-01 Engenheiro Luiz Edmundo Carrijo Coube Avenue, 17033-360, Bauru, SP, Brazil.
Jazyk: angličtina
Zdroj: Journal of fish biology [J Fish Biol] 2018 Jun; Vol. 92 (6), pp. 1915-1928. Date of Electronic Publication: 2018 Apr 19.
DOI: 10.1111/jfb.13629
Abstrakt: Membranous organelles, acid glycoconjugates and lipids were characterized in the digestive tract mucosa of Hemisorubim platyrhynchos by cytochemistry techniques. Two types of mucous-secreting cells were observed in the digestive tract epithelium: goblet cells in the oesophagus and intestine and epithelial cells in the stomach. These cells had a Golgi apparatus more developed than the other cell types. The cytochemical analysis revealed that secretory granules are reactive to acid glycoconjugates, varying in reaction intensity according to the region of the digestive tract. Acid glycoconjugate reactions were also observed in oesophageal epithelial cell microridges and in enterocyte microvilli. In the digestive tract, acid glycoconjugates act to protect the epithelial surface, increasing mucous viscosity, which facilitates the passage of food, prevents the binding of parasites and facilitates their removal. Through lipid staining, a coated membrane was observed around each secretory granule of the oesophageal and intestinal goblet cells, while gastric epithelial cells granules were fully reactive. Oxynticopeptic cells of the gastric glands showed lipid droplets in the cytoplasm and also in the mitochondrial matrix, which act as an energy reserve for these cells that have a high energy demand. Enterocytes showed a well-developed smooth endoplasmic reticulum, especially in the apical region of the cell, being related to absorption and resynthesis of lipids.
(© 2018 The Fisheries Society of the British Isles.)
Databáze: MEDLINE
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