Abstract:
:Histochemical distribution of glycoproteins, carbohydrates and proteins rich in different amino acids were studied using histological and histochemical procedures, in Senegal sole, Solea senegalensis (Kaup, 1858) larvae from hatching until day 15. Glycogen, proteins and glycoproteins were detected in the yolk-sac of the larvae at hatching and during the yolk-resorption. The epithelial digestive system (brush border, enterocytes and goblet cells) contained neutral and acid mucins (carboxylated and/or sulphated). Glycogen was observed in the cytoplasm of the digestive absortive cells (enterocytes) and in the liver (hepatocytes) on day 3-4 posthatching. Protein reactions, and specially those that showed proteins rich in arginine, tyrosine and tryptophan, were very intense in the zymogen granules of the pancreatic cells. Oesophageal and intestinal goblet cells contained glucose N-acetyl and sialic acid residues, but the mucin content of these mucous cells did not show affinity towards Con-A, suggesting the absence of glycoproteins with Mannose and/or glucose residues. WGA showed a very intense positivity in the microvilli of the digestive epithelium of the larvae and positive granules for both lectins, specially for Con-A, were detected in the cytoplasm of the anterior intestinal enterocytes.
journal_name
Histol Histopatholjournal_title
Histology and histopathologyauthors
Sarasquete C,González de Canales ML,Arellano JM,Muñoz-Cueto JA,Ribeiro L,Dinis MTsubject
Has Abstractpub_date
1996-10-01 00:00:00pages
881-8issue
4eissn
0213-3911issn
1699-5848journal_volume
11pub_type
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journal_title:Histology and histopathology
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