Glyconjugates in epidermal, branchial and digestive mucous cells and gastric glands of gilthead sea bream, Sparus aurata, Senegal sole, Solea senegalensis and Siberian sturgeon, Acipenser baeri development.
Identifieur interne : 000042 ( Ncbi/Checkpoint ); précédent : 000041; suivant : 000043Glyconjugates in epidermal, branchial and digestive mucous cells and gastric glands of gilthead sea bream, Sparus aurata, Senegal sole, Solea senegalensis and Siberian sturgeon, Acipenser baeri development.
Auteurs : C. Sarasquete [Espagne] ; Enric Gisbert [Espagne] ; L. Ribeiro ; L. Vieira ; M T DinisSource :
- European journal of histochemistry : EJH [ 1121-760X ] ; 2001.
English descriptors
- KwdEn :
- Animals, Branchial Region (cytology), Branchial Region (growth & development), Branchial Region (metabolism), Epidermis (cytology), Epidermis (growth & development), Epidermis (metabolism), Fishes (anatomy & histology), Flatfishes, Gastric Mucosa (cytology), Gastric Mucosa (growth & development), Gastric Mucosa (metabolism), Glycoconjugates (metabolism), Histocytochemistry, Larva (growth & development), Lipid Metabolism, Proteins (metabolism), Sea Bream.
- MESH :
- chemical , metabolism : Glycoconjugates, Proteins.
- anatomy & histology : Fishes.
- cytology : Branchial Region, Epidermis, Gastric Mucosa.
- growth & development : Branchial Region, Epidermis, Gastric Mucosa, Larva.
- metabolism : Branchial Region, Epidermis, Gastric Mucosa.
- Animals, Flatfishes, Histocytochemistry, Lipid Metabolism, Sea Bream.
Abstract
Epidermal, branchial and digestive mucous cells, and the gastric glands of larvae/postlarvae (from hatching until 45 days posthatching) of three fish species (two teleostean and a chondrostean) were investigated using conventional histochemical methods (periodic acid schiff -PAS-, diastase-PAS; alcian blue pH 0.5, 1 and 2.5) in order to distinguish neutral and acidic (carboxylated and sulphated) glycoconjugates, as well as bromophenol blue reaction for identification of proteins. Additionally, the presence and distribution of sugar residues in the oligosaccharide side chains of glycoconjugates were investigated using horseradish peroxidase (HPR)-conjugated lectins (Con A, DBA, WGA and UEA-I). Most mucous cells (digestive, epidermal and branchial) of Siberian sturgeon, Acipenser baeri, sea bream, Sparus aurata and Senegal sole, Solea senegalensis larvae were PAS- and alcian blue- (pH 2.5 and 0.5) positive, with small variations between organs/tissues and species. Bromophenol blue reaction (general proteins) was positive in a minority of the mucous cells, usually in those cells which were PAS-negative. Proteins rich in sulphydryl (-SH) and/or disulphide (-S-S-) groups related with the glycoprotein nature of the glycoconjugates present in mucous cells were also observed. Epidermal, branchial and digestive mucous cells of all studied larvae did not contain glycogen or lipids. Con A lectin staining was negative in all mucous cells types of sea bream and sole, but oesophageal mucous cell of sturgeon were reactive to different lectin reactions, suggesting the presence of mannose -Man- and/or glucose -Glc-, L-fucose -Fuc- ; N-acetyl-D-galactosamine -GalNAc-, as well as N-acetyl-D-glucosamine- GlcNAc - and/or sialic acid -NANA- residues. Digestive mucous cells of all studied larvae were positive to WGA and DBA lectins. Epidermal and branchial mucous cells of sea bream and sole were Con A, DBA and UEA-I unreactive. However, mucous cells of sturgeon larvae were stained with UEA-I lectin. Gastric glands appear very early in sturgeon stomach larvae development (between 5-6 days posthatching) but rather late (around 40 days) during the ontogeny of sole and sea bream larvae. These glands contain neutral glycoproteins with Man and/or Glc, Fuc, GlcNAc- and/or sialic acid and rich in GalNAc- sugar residues, as well as proteins moderately rich in arginine, and others particularly rich in tyrosine and tryptophan.
PubMed: 11759813
Affiliations:
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pubmed:11759813Le document en format XML
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<term>Branchial Region (metabolism)</term>
<term>Epidermis (cytology)</term>
<term>Epidermis (growth & development)</term>
<term>Epidermis (metabolism)</term>
<term>Fishes (anatomy & histology)</term>
<term>Flatfishes</term>
<term>Gastric Mucosa (cytology)</term>
<term>Gastric Mucosa (growth & development)</term>
<term>Gastric Mucosa (metabolism)</term>
<term>Glycoconjugates (metabolism)</term>
<term>Histocytochemistry</term>
<term>Larva (growth & development)</term>
<term>Lipid Metabolism</term>
<term>Proteins (metabolism)</term>
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<term>Gastric Mucosa</term>
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<front><div type="abstract" xml:lang="en">Epidermal, branchial and digestive mucous cells, and the gastric glands of larvae/postlarvae (from hatching until 45 days posthatching) of three fish species (two teleostean and a chondrostean) were investigated using conventional histochemical methods (periodic acid schiff -PAS-, diastase-PAS; alcian blue pH 0.5, 1 and 2.5) in order to distinguish neutral and acidic (carboxylated and sulphated) glycoconjugates, as well as bromophenol blue reaction for identification of proteins. Additionally, the presence and distribution of sugar residues in the oligosaccharide side chains of glycoconjugates were investigated using horseradish peroxidase (HPR)-conjugated lectins (Con A, DBA, WGA and UEA-I). Most mucous cells (digestive, epidermal and branchial) of Siberian sturgeon, Acipenser baeri, sea bream, Sparus aurata and Senegal sole, Solea senegalensis larvae were PAS- and alcian blue- (pH 2.5 and 0.5) positive, with small variations between organs/tissues and species. Bromophenol blue reaction (general proteins) was positive in a minority of the mucous cells, usually in those cells which were PAS-negative. Proteins rich in sulphydryl (-SH) and/or disulphide (-S-S-) groups related with the glycoprotein nature of the glycoconjugates present in mucous cells were also observed. Epidermal, branchial and digestive mucous cells of all studied larvae did not contain glycogen or lipids. Con A lectin staining was negative in all mucous cells types of sea bream and sole, but oesophageal mucous cell of sturgeon were reactive to different lectin reactions, suggesting the presence of mannose -Man- and/or glucose -Glc-, L-fucose -Fuc- ; N-acetyl-D-galactosamine -GalNAc-, as well as N-acetyl-D-glucosamine- GlcNAc - and/or sialic acid -NANA- residues. Digestive mucous cells of all studied larvae were positive to WGA and DBA lectins. Epidermal and branchial mucous cells of sea bream and sole were Con A, DBA and UEA-I unreactive. However, mucous cells of sturgeon larvae were stained with UEA-I lectin. Gastric glands appear very early in sturgeon stomach larvae development (between 5-6 days posthatching) but rather late (around 40 days) during the ontogeny of sole and sea bream larvae. These glands contain neutral glycoproteins with Man and/or Glc, Fuc, GlcNAc- and/or sialic acid and rich in GalNAc- sugar residues, as well as proteins moderately rich in arginine, and others particularly rich in tyrosine and tryptophan.</div>
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