Morphology and lectin‐binding sites of pyloric caeca epithelium in normal and GnRH‐treated Atlantic bluefin tuna (<i>Thunnus thynnus</i>) Linnaeus 1758

Zizza, Sara; Desantis, Salvatore

doi:10.1002/jemt.20970

Cited by 4 publications

(4 citation statements)

References 50 publications

(67 reference statements)

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“…Their number is variable in different species. Pyloric ceca can be present as isolated structures for example in tuna ( Thunnus thynnus ), or as a unique structure as the pyloric gland of the sturgeon ( Acipenser transmontanus ) [ 48 , 56 ]. In general, pyloric ceca are storage organs allowing fish to eat infrequently avoiding starvation when feed is scarce and taking advantage of when feed resources are abundantly available [ 57 ].…”

Section: Discussionmentioning

confidence: 99%

The Alimentary Tract of African Bony-Tongue, Heterotis niloticus (Cuvier, 1829): Morphology Study

Guerrera

Aragona

Briglia

et al. 2022

Animals

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A morphological study of the alimentary tract, from the oropharyngeal cavity to the rectum, including the attached glands, of African bony-tongue, Heterotis niloticus (Cuvier, 1829) was carried out by gross anatomy, and light microscope analysis. This study aimed to give a deeper knowledge of the alimentary tract morphological features of this species of commercial interest. H. niloticus is distinguished by individual morphological characteristics showing a digestive tract similar to that of reptiles and birds. Within the oropharyngeal cavity, two tubular structures with digitiform ends are arranged on both lateral sides of the triangular tongue. The oropharyngeal cavity connects the stomach by a short esophagus. This latter is adapted to mechanical trituration, and it is divided into a pars glandularis and a thick-walled pars muscularis. The gizzard flows into the anterior intestine and two blind pyloric appendages, which exhibit specific functions, including immune defense for the presence of secondary lymphoid organs. The anterior intestine continues with the middle and posterior tracts up into the rectum. According to the histological observations, all regions of the alimentary tract have common structural features, typical of hollow organs, with differences in the mucosa structure that reflects the different functions of the apparatus, from mouth to anus. Within this study, we provided the first basis for future studies on optimizing rearing conditions, feed conversion ratio, and the digestive capacity, improving the growth performance of this species, and ensuring its conservation.

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Section: Discussionmentioning

confidence: 99%

The Alimentary Tract of African Bony-Tongue, Heterotis niloticus (Cuvier, 1829): Morphology Study

Guerrera

Aragona

Briglia

et al. 2022

Animals

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“…Acid mucins are predominant in the proximal intestine of E. lucius , the only region where a low number of mucous cells containing acidic sulfated mucins was identified. In fish, sulfated mucins protect the intestinal mucosa from the gastric acid chime [ 62 ] and regulate the transport of proteins and their fragments, as well as ions and fluids, across the plasma membrane [ 33 , 42 , 62 ]. We detected mucous cells containing sulfated mucins in the proximal intestine, whereas carboxylated mucins were present in proximal, medial, and distal regions.…”

Section: Discussionmentioning

confidence: 99%

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

Bosi

Lorenzoni

Carosi

et al. 2020

Animals

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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.

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“…A study conducted by Zizza & Desantis (2011) using Atlantic bluefin tuna (Thunnus thynnus) determined that GnRH administration had morphologic and histochemical effects on pyloric epithelium. In the GnRH-treated group, epithelial longer goblet cells and intraepithelial leukocytes were more numerous.…”

Section: Discussionmentioning

confidence: 99%

Investigation of the Effect of GnRH (Deslorelin) on the Histochemical Structure of Salivary Glands in Rats

2019

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This study was planned to determine the histochemical alterations of the submandibular gland by implantation of long-term GnRH (deslorelin 4.7 mg). Eighteen Wistar albino rats were used in the study. Alcian blue (AB; pH: 2.5), periodic acid-Schiff (PAS) staining was performed to determine the microscopic structure and histochemical structure of the GI submandibular gland. The Avidin-Biotin Complex (ABC) method was used to determine the immunohistochemical reactivity of lectin. After GnRH implantation, the organs were examined and atrophies were observed in organs. In the group in which the implants were removed, it was determined that there was no atrophy; organ structures and microscopic examination were similar to the control group. At the end of the study, submandibular gland was fixed in 10 % buffered formaldehyde. In three groups, PAS and AB histochemical staining revealed similar reactions. Immunohistochemically, lectin activity was found to react positively.

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Morphology and lectin‐binding sites of pyloric caeca epithelium in normal and GnRH‐treated Atlantic bluefin tuna (Thunnus thynnus) Linnaeus 1758

Cited by 4 publications

References 50 publications

The Alimentary Tract of African Bony-Tongue, Heterotis niloticus (Cuvier, 1829): Morphology Study

The Alimentary Tract of African Bony-Tongue, Heterotis niloticus (Cuvier, 1829): Morphology Study

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

Investigation of the Effect of GnRH (Deslorelin) on the Histochemical Structure of Salivary Glands in Rats

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