An immunocytochemical study of the endocrine cells in the stomach and duodenum of Zonotrichia capensis subtorquata (Passeriformes, Emberizidae)

Mendes, Rosa Maria M.; Nascimento, Aparecida Alves do; Santos, Clarice Machado dos; Cardoso, T R D; Pinheiro, Nadja Lima; Sales, Armando

doi:10.1016/j.acthis.2008.02.003

Cited by 12 publications

(10 citation statements)

References 34 publications

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“…Our results are consistent with prior work that considered the mucopolysaccharides to play a crucial role in the hydrolytic process and represent an integral and functional part of the plasmalemma (El-Shammaa et al, 2019;Ito, 1965). Goblet cells together with the crypts in the ileum also secrete mucins as evidenced by our histochemical analyses, which fundamentally protect the intestinal epithelium against acidic medium and enzymatic activities (Mendes et al, 2009). Furthermore, the sulphated mucin presumably confers protection against bacteria (Cheled-Shoval et al, 2014).…”

Section: Discussionsupporting

confidence: 92%

Macro‐ and microstructures of the digestive tract in the Eurasian collared dove, Streptopelia decaocto (Frivaldszky 1838): Adaptive interplay between structure and dietary niche

El‐Mansi

El-Bealy

Rady

et al. 2021

Microscopy Res & Technique

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We describe the functional morphology of the digestive tract of the Eurasian collared dove, Streptopelia decaocto using anatomical, morphometric, histological, histochemical, and ultrastructure techniques, and relate our findings to the species' dietary niche. Our results revealed that the esophagus is displaced on both sides of the neck and has highly folded tunica mucosa, which confer greater elasticity for efficient swallowing and passage of food to the crop. The proventriculus is delicate and its mucosal layer contains polymorphic glands with dense profound and superficial secretory units that open to the luminal surface by gastric pores. The ventriculus is biconvex and lined with a keratinized koilin membrane. The tubular glands within the mucosal lining include the isthmus, the neck, and the basal segment that comprise chief and basal cells with prominent nuclei. At the cuticle-mucosal interface, pyramidal vertical rodlets of the cuticle are secreted and superficially covered by a thin film of a horizontal matrix. The mucosa of the ileum form pyramidal villi that are oriented perpendicularly to the central lumen. Enterocytes infiltrated with goblet cells make up the epithelial lining of the villi. There are subtle differences in the thicknesses of corresponding tunics together with histochemical reactions of alcian blue (AB) and Masson-Goldner trichrome (MT) for their microstructures. Overall, our findings reveal remarkable convergence of both macro-and microstructures in S. decaocto to other granivorous species, and offer further evidence of the close association between functional morphology and feeding style relative to food swallowing, digestion, and absorption.

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Section: Discussionsupporting

confidence: 92%

Macro‐ and microstructures of the digestive tract in the Eurasian collared dove, Streptopelia decaocto (Frivaldszky 1838): Adaptive interplay between structure and dietary niche

El‐Mansi

El-Bealy

Rady

et al. 2021

Microscopy Res & Technique

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“…These cells are rarely reported in bird literature. In the passerine Zonotrichia capensis subtorquata Statius Muller, 1776, 5‐HT‐immunoreactive cells were observed along proventricular and ventricular glands (Mendes et al, ), also reported in Tangara seledon Statius Muller, 1776 (Cardoso, Pinheiro, Mota, & Yamada, ). 5‐HT is related to physiological processes, especially the interaction between the GIT immune, endocrine and nervous systems.…”

Section: Discussionmentioning

confidence: 87%

Histochemical and immunohistochemical adaptations on the gastroesophageal tube of the blue‐fronted parrot (Amazona aestiva Linnaeus, 1758)

2019

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Amazona aestiva Linnaeus, 1758 is known as the blue‐fronted parrot. These animals are considered seed dispersion, contributing to ecological balance. Despite its ecological importance, A. aestiva is listed as an imminent danger of becoming extinct, as it is one of the most illegally traded native species in Brazil, besides losing its habitat due to deforestation and forest fires. The cranial oesophagus mucosa is lined with a non‐keratinized stratified squamous epithelium, and the basal layer presents melanocyte accumulation. No mucous glands were observed in the lamina propria/submucosa. The ingluvium two different muscular layer patterns were observed, one internal and circular and one very thick, external and longitudinal. The proventriculum submucosa consists of polygonal proventricular glands and contents into a broad central duct lined with simple columnar epithelium Periodic acid‐reactive Schiff positive (PAS+) and Alcian blue positive (AB+). The 5‐HT cells are dispersed in the proventricular glands located at base and apex. The ventricle mucous layer contains numerous branched folds lined by a simple columnar epithelium. The epithelium was negative reaction for PAS and positive for AB only on the fold surfaces. The 5‐HT cells were scarce and observed only at the base of the ventricular gland, as well as in the adjacent connective tissue.

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“…The DNES cells, which are endocrine cells that secrete hormones, undertake the important function in this absorption and regulation of digestion (SimSek et al, 2011). The morphology of the digestive organs and the distributions of enteroendocrine cells in the gastrointestinal mucosa have been shown to differ depending on the species and organs (Yamada et al, 1993;Mendes et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

A Histochemical and Immunohistochemical Study on the Gastrointestinal Tract of Sparrowhawk (Accipiter nisus)

Kara

Balkaya

2022

Int. J. Morphol.

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In the present study, we aimed to determine the localization and distribution of entero-endocrine cells in the gastrointestinal tract by immunohistochemical methods and understand the structure of the glycoproteins elaborated by the epithelium the digestive tract regions by histochemical methods. The nine sparrowhawks were euthanized, and gastrointestinal tract tissues were removed and fixed in formalin. The gastrointestinal tract sections were stained with immunohistochemical and histochemical techniques to evaluate the enteroendocrine cells and histomorphometric analysis. The results showed that the numbers of somatostatin in the ventriculus, gastrin in the proventriculus, serotonin in the duodenum and jejunum immunopositivity are higher, remaining segments of the gastrointestinal tract are detected slight positivity in the glucagon, gastrin, serotonin, and somatostatin. In conclusion, some endocrine cells localization and distribution and histomorphometry, and goblet cell counts were revealed in the gastrointestinal tract of the sparrowhawks.

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An immunocytochemical study of the endocrine cells in the stomach and duodenum of Zonotrichia capensis subtorquata (Passeriformes, Emberizidae)

Cited by 12 publications

References 34 publications

Macro‐ and microstructures of the digestive tract in the Eurasian collared dove, Streptopelia decaocto (Frivaldszky 1838): Adaptive interplay between structure and dietary niche

Macro‐ and microstructures of the digestive tract in the Eurasian collared dove, Streptopelia decaocto (Frivaldszky 1838): Adaptive interplay between structure and dietary niche

Histochemical and immunohistochemical adaptations on the gastroesophageal tube of the blue‐fronted parrot (Amazona aestiva Linnaeus, 1758)

A Histochemical and Immunohistochemical Study on the Gastrointestinal Tract of Sparrowhawk (Accipiter nisus)

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