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Anatomical, histochemical, and immunohistochemical observations on the gastrointestinal tract of Gallinula chloropus (Aves: Rallidae). BMC ZOOL 2022; 7:61. [PMID: 37170387 PMCID: PMC10127349 DOI: 10.1186/s40850-022-00161-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 12/05/2022] [Indexed: 12/29/2022] Open
Abstract
Abstract
Background
Gallinula chloropus (Linnaeus, 1758) is a wild aquatic omnivorous bird characterized by a marked resistance to harsh environmental conditions and a worldwide distribution. In this study, anatomical, morphometrical, histochemical, and immunohistochemical techniques were employed to study the structure of the gastrointestinal tract of Gallinula chloropus.
Results
The esophagus appeared tubular with no distinct crop. Both superficial (SPG) and deep (DPG) proventricular glands were present. The DPG filled about two-thirds of the total wall thickness. Histochemically, the mucosubstances revealed mixed alcian blue-PAS positive reactions. They were mainly localized in the acini of the esophageal glands and SPG, gastric surface epithelium, duct system of DPG, and intestinal goblet cells. The highest number of goblet cells per every 1 mm2 of the intestinal mucosa was seen within the ileum and rectum, 2555 ± 468 and 2607 ± 653 respectively. Notably, glucagon immunoreactive (IR) cells were abundant in the mucosa of the small and large intestines and the proventriculus, while somatostatin IR cells were concentrated within the acini of the DPG. IR cells for the mitosis marker phospho-histone H3 (PHH3) were highest within the entire intestinal crypts and mucosa-associated lymphoid tissues (MALT). In contrast, cells IR for the apoptosis marker C.CASP3 were remarkable in epithelial cells at the tips of intestinal villi and in MALT, reflecting the dynamic nature of the latter mentioned structures.
Conclusions
The findings of the present study advance our knowledge of the gross and microscopic anatomy of the gastrointestinal tract in wild birds and could help to enhance the productivity of Aves via improving gut health.
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El-Mansi AA, El-Bealy EA, Rady AM, Abumandour MA, El-Badry DA. Macro- and microstructures of the digestive tract in the Eurasian collared dove, Streptopelia decaocto (Frivaldszky 1838): Adaptive interplay between structure and dietary niche. Microsc Res Tech 2021; 84:2837-2856. [PMID: 34036668 DOI: 10.1002/jemt.23843] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 05/15/2021] [Accepted: 05/16/2021] [Indexed: 11/06/2022]
Abstract
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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Affiliation(s)
- Ahmed A El-Mansi
- Biology Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia.,Zoology Department, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Eman A El-Bealy
- Biology Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | - Ahmed M Rady
- Biology Department, Faculty of Science, King Saud University, Riyadh, Saudi Arabia
| | - Mohamed A Abumandour
- Anatomy and Embryology Department, Faculty of Veterinary Medicine, Alexandria University, Behera, Egypt
| | - Dina A El-Badry
- Zoology Department, Faculty of Science, Mansoura University, Mansoura, Egypt
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Blanco AM, Calo J, Soengas JL. The gut–brain axis in vertebrates: implications for food intake regulation. J Exp Biol 2021; 224:224/1/jeb231571. [DOI: 10.1242/jeb.231571] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
ABSTRACT
The gut and brain are constantly communicating and influencing each other through neural, endocrine and immune signals in an interaction referred to as the gut–brain axis. Within this communication system, the gastrointestinal tract, including the gut microbiota, sends information on energy status to the brain, which, after integrating these and other inputs, transmits feedback to the gastrointestinal tract. This allows the regulation of food intake and other physiological processes occurring in the gastrointestinal tract, including motility, secretion, digestion and absorption. Although extensive literature is available on the mechanisms governing the communication between the gut and the brain in mammals, studies on this axis in other vertebrates are scarce and often limited to a single species, which may not be representative for obtaining conclusions for an entire group. This Review aims to compile the available information on the gut–brain axis in birds, reptiles, amphibians and fish, with a special focus on its involvement in food intake regulation and, to a lesser extent, in digestive processes. Additionally, we will identify gaps of knowledge that need to be filled in order to better understand the functioning and physiological significance of such an axis in non-mammalian vertebrates.
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Affiliation(s)
- Ayelén Melisa Blanco
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, 36310 Vigo, Pontevedra, Spain
| | - Jessica Calo
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, 36310 Vigo, Pontevedra, Spain
| | - José Luis Soengas
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, 36310 Vigo, Pontevedra, Spain
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de Luca BG, Bastos AL, da S Souza ASF, Abidu-Figueiredo M, Machado-Santos C. 5HT expression in the stomach and duodenum of the Rhesus Monkey (Macaca mulatta). Tissue Cell 2020; 65:101350. [PMID: 32746994 DOI: 10.1016/j.tice.2020.101350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 03/12/2020] [Accepted: 03/13/2020] [Indexed: 10/24/2022]
Abstract
This study aims to provide a histological description of different regions of the gastric and duodenal mucosa in Rhesus monkey, as well as to analyze the distribution and the relative frequency of 5-HT. The cardia region mucosa consists of simple columnar epithelium PAS + and AB + and the 5-HT cells were observed at the base of the gland (QA [5-HT cells]/mm²) = 8.72 ± 4.98). The body region, has a smaller number of glands. The 5-HT cells were found predominant in the base of the gastric glands. QA= 6.96 ± 3.81. When compared to body region, the stomach fundus has smaller gastric pits. The 5-HT cells are found at the base of the glands near the main cells. QA = 5.29 ± 2.09. The pylorus region was found to have deep pits and well-developed gastric glands. The 5-HT cells are scarce, at the base of the pyloric gland. QA = 1.18 ± 1.36. The duodenum presented goblet cells strong PAS + and AB +. 5-HT cells were found both in the lining epithelium and in the intestinal glands. QA = 8.16 ± 2.59.
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Affiliation(s)
- B G de Luca
- Laboratory of Teaching and Research in Histology and Comparative Embryology (LEPHEC), Federal Fluminense University, Niterói, RJ, Brazil
| | - A L Bastos
- Laboratory of Teaching and Research in Histology and Comparative Embryology (LEPHEC), Federal Fluminense University, Niterói, RJ, Brazil
| | - A S F da S Souza
- Postgraduate Program in Animal Science - CCTA, North Fluminense State University, Campos, RJ, Brazil
| | - M Abidu-Figueiredo
- Postgraduate in Animal Biology, Federal Rural University of Rio de Janeiro, Seropédica, RJ, Brazil
| | - C Machado-Santos
- Laboratory of Teaching and Research in Histology and Comparative Embryology (LEPHEC), Federal Fluminense University, Niterói, RJ, Brazil.
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Hiramatsu K. Chicken Intestinal L Cells and Glucagon-like Peptide-1 Secretion. J Poult Sci 2020; 57:1-6. [PMID: 32174759 PMCID: PMC7063072 DOI: 10.2141/jpsa.0190003] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 02/19/2019] [Indexed: 01/05/2023] Open
Abstract
Many types of endocrine cells have been identified in the gastroenteropancreatic system of vertebrates, which have subsequently been named with alphabet (s). L cells which secrete the glucagon-like peptide (GLP)-1 are scattered in the intestinal epithelium. This review discusses the morphological features of chicken L cells and GLP-1 secretion from intestinal L cells. L cells, identified using GLP-1 immunohistochemistry, are open-type endocrine cells that are distributed in the jejunum and ileum of chickens. GLP-1 co-localizes with GLP-2 and neurotensin in the same cells of the chicken ileum. Intestinal L cells secrete GLP-1 in response to food ingestion. Proteins and amino acids, such as lysine and methionine, in the diet trigger GLP-1 secretion from the chicken intestinal L cells. The receptor that specifically binds chicken GLP-1 is expressed in pancreatic D cells, implying that the physiological functions of chicken GLP-1 differ from its functions as an incretin in mammals.
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Affiliation(s)
- Kohzy Hiramatsu
- Laboratory of Animal Functional Anatomy (LAFA), Faculty of Agriculture, Shinshu University, Minami-minowa 8304, Kami-ina, Nagano 399-4598, Japan
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da Silva Macêdo J, Machado-santos C, Ferreira I. Histochemical and immunohistochemical adaptations on the gastroesophageal tube of the blue‐fronted parrot (Amazona aestiva Linnaeus, 1758). ACTA ZOOL-STOCKHOLM 2019. [DOI: 10.1111/azo.12316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Jaqueline da Silva Macêdo
- Postgraduate in Animal Biology Federal Rural University of Rio de Janeiro Seropédica Rio de Janeiro Brazil
| | - Clarice Machado-santos
- Human Compared Histology and Embryology Research Laboratory Federal Fluminense University Niterói Rio de Janeiro Brazil
| | - Ildemar Ferreira
- Institute of Biological and Health Sciences Federal Rural University of Rio de Janeiro Seropédica Rio de Janeiro Brazil
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Gonkowski S, Całka J. The influence of selected pathological states on the somatostatin-like immunoreactive (SOM-LI) endocrine cells in the mucosal layer of the porcine descending colon. PESQUISA VETERINARIA BRASILEIRA 2012. [DOI: 10.1590/s0100-736x2012001300014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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