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Benchaya GA, Ramires AC, Picelli AM, Magalhães MDS. Morphological description of the digestive tract of the Amazonian Diving Lizard Uranoscodon superciliosus (Linnaeus, 1758) and its associations to the diet and foraging mode. AN ACAD BRAS CIENC 2024; 96:e20220650. [PMID: 38922253 DOI: 10.1590/0001-3765202420220844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 10/16/2023] [Indexed: 06/27/2024] Open
Abstract
The study aimed to characterize the digestive tract of Uranoscodon superciliosus and its associations to the diet and foraging behavior already described for the species. Five lizards were captured in forest areas near the city of Manaus, Amazonas, Brazil. Tongue, oesophagus, stomach, small and large intestines fragments were collected, fixed, and processed for light microscopy. Hyaline cartilage was present in the center of the tongue, and the papillae from the apex and glands from the radix showed positive reaction to Alcian blue. The oesophagus presented a folded mucosa, covered by an epithelium with mucous and goblet cells positive to PAS and Alcian blue. There was presence of gastric glands in the cardic and fundic stomach regions, plus all the regions reacted positively to PAS. Fold and villi variations in both small and large intestine were noted, as well as the number and arrangement of goblet cells. Mucous and goblet cells from the small intestine were positively stained in PAS, while only the goblet cells were Alcian blue positive. These findings indicate that the Amazonian Diving Lizard's digestive tract organs, mainly the tongue and stomach, present morphologies associated to ambush-type foraging and a specific diet largely based on small invertebrates.
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Affiliation(s)
- Gabriella A Benchaya
- Universidade Federal do Amazonas, Instituto de Ciências Biológicas, Av. Jauary Marinho, Setor Sul, Bloco ICB, Coroado, 69067-005 Manaus, AM, Brazil
| | - Adriane C Ramires
- Universidade Federal do Amapá, Departamento de Ciências Biológicas e da Saúde, Laboratório de Estudos Morfofisiológicos e Parasitários, Prédio DCBS/UNIFAP, Rod. Josmar Chaves Pinto, Km 02, Jardim Marco Zero, 68903-419 Macapá, AP, Brazil
| | - Amanda Maria Picelli
- Universidade do Estado do Amazonas, Escola Superior de Ciências da Saúde, Av. Carvalho Leal, 1777, Cachoeirinha, 69065-001 Manaus, AM, Brazil
| | - Marcela Dos Santos Magalhães
- Universidade Federal do Amazonas, Instituto de Ciências Biológicas, Departamento de Morfologia, Av. Jauary Marinho, Setor Sul, Bloco ICB 01, Coroado, 69067-005 Manaus, AM, Brazil
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Zhang H, Wu H, Lu W, Chang Y, Li C, Chu D, Chen Y, Han X, Li N. Morphological changes in the digestive tract of the Chinese soft-shelled turtle ( Pelodiscus sinensis) during embryonic development. J Histotechnol 2023; 46:28-38. [PMID: 35912945 DOI: 10.1080/01478885.2022.2105490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
The digestive tract development of the Pelodiscus sinensis embryo is described through the observation of the embryonic morphology on hematoxylin and eosin stained tissue sections. During the first 9 days of embryonic development, the anterior intestine of the embryo divides into the oral cavity, pharyngeal cavity, esophagus, stomach, and small intestine, while the caudal intestine differentiates into the cloaca, the anterior and caudal tubes of the large intestine. Between days 10-24, the wall of the digestive tract forms a two-layer structure consisting of mucosa and submucosa. The endoderm evolves into epithelial tissue in each part of the digestive tract, the mesoderm goes from a dense cluster of cells to looser mesenchymal tissue then divides into loose connective tissue, mesothelium, and muscle tissue. There is no clear temporal boundary between development of mesenchymal tissue and the early loose connective tissue, which is a gradual process.
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Affiliation(s)
- Haili Zhang
- College of Agriculture and Bioengineering, Heze University, Heze, Shandong, China
| | - Hongsong Wu
- College of Agriculture and Bioengineering, Heze University, Heze, Shandong, China
| | - Wen Lu
- College of Agriculture and Bioengineering, Heze University, Heze, Shandong, China
| | - Yanli Chang
- Boshan First Middle School, Zibo, Shandong, China
| | - Chunhua Li
- Logistics Management Office, Heze University, Heze, Shandong, China
| | - Dechang Chu
- College of Agriculture and Bioengineering, Heze University, Heze, Shandong, China
| | - Yan Chen
- College of Agriculture and Bioengineering, Heze University, Heze, Shandong, China
| | - Xue Han
- College of Agriculture and Bioengineering, Heze University, Heze, Shandong, China
| | - Na Li
- College of Agriculture and Bioengineering, Heze University, Heze, Shandong, China
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Serra-Campos AO, Abreu-Junior ANG, Nascimento AA, Abidu-Figueiredo M, Lima MSCS, Machado-Santos C. Gastroesophageal tube of the Iguana iguana (Iguanidae): histological description, histochemical and immunohistochemical analysis of 5-HT and SS cells. BRAZ J BIOL 2021; 83:e242086. [PMID: 34161453 DOI: 10.1590/1519-6984.242086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 01/12/2021] [Indexed: 11/21/2022] Open
Abstract
The work aims were to describe the histological and histochemical structure of the gastroesophageal tube of Iguana iguana and verify the occurrence and distribution of immunoreactive serotonin (5-HT) and somatostatin (SS) cells. Fragments of the gastrointestinal tract (GIT) of five iguanas were which underwent standard histological and immunohistochemistry technique. Immunoreactive cells for 5-HT and SS were quantified using the STEPanizer. The oesophagus has ciliated columnar pseudostratified epithelium with staining Alcian blue (AB) + and goblet cells highly reactive to periodic acid Schiff (PAS). In the cervical oesophagus, the numerical density of 5-HT cells per unit area (QA [5-HT cells]/µm2) was 4.6x10-2 ± 2.0 and celomatic oesophagus presented QA = 4.0x10-2 ± 1.0. The epithelium of the stomach is simple columnar, PAS and AB +. The cranial and middle regions of the stomach presented (QA [5-HT cells]/µm2) = 6.18x10-2 ± 3.2 and the caudal region, QA = 0.6x10-2 ± 0.2. The SS cells were only observed in the caudal stomach, with numerical density (QA [SS cells]/µm2) = 1.4x10-2 ± 0.9 In I. iguana, variation was observed in terms of the distribution of mucus secretions and the pattern of occurrence of serotonin and somatostatin-secreting enteroendocrine cells in the TGI, which possibly will result in an interspecific adaptive response.
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Affiliation(s)
- A O Serra-Campos
- Universidade Federal Fluminense - UFF, Departamento de Morfologia, Laboratório de Ensino e Pesquisa em Histologia e Embriologia Comparada - LEPHEC, Niterói, RJ, Brasil
| | - A N G Abreu-Junior
- Universidade Federal do Piauí - UFPI, Departamento de Biologia, Laboratório de Herpertologia, Floriano, PI, Brasil
| | - A A Nascimento
- Universidade Federal Rural do Rio de Janeiro - UFRRJ, Instituto de Ciências Biológicas e da Saúde, Programa de Pós-graduação em Biologia Animal, Seropédica, RJ, Brasil
| | - M Abidu-Figueiredo
- Universidade Federal Rural do Rio de Janeiro - UFRRJ, Instituto de Ciências Biológicas e da Saúde, Programa de Pós-graduação em Biologia Animal, Seropédica, RJ, Brasil
| | - M S C S Lima
- Universidade Federal do Piauí - UFPI, Departamento de Biologia, Laboratório de Herpertologia, Floriano, PI, Brasil
| | - C Machado-Santos
- Universidade Federal Fluminense - UFF, Departamento de Morfologia, Laboratório de Ensino e Pesquisa em Histologia e Embriologia Comparada - LEPHEC, Niterói, RJ, Brasil
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Mahfud M, Ernawati E, Mahmud NRA, Budipitojo T, Wijayanto H. An immunohistochemical study of endocrine cells in the digestive tract of Varanus salvator (Reptile: Varanidae). Vet World 2020; 13:1737-1742. [PMID: 33132583 PMCID: PMC7566259 DOI: 10.14202/vetworld.2020.1737-1742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 07/10/2020] [Indexed: 11/16/2022] Open
Abstract
Aim: The aim of the study was to identify the distribution pattern and frequency of endocrine cell types in the digestive tract of Varanus salvator. Materials and Methods: The presence of endocrine cells (glucagon, somatostatin, and serotonin) in the digestive tract (esophagus, stomach, and intestine) was detected using the avidin-biotin complex (ABC) method. Results: Three types of endocrine cells immunoreactive to antisera glucagon, serotonin, and somatostatin were found in the caudal portion of the small and large intestines but were not observed in the esophagus, stomach, and caput and medial sections of the small intestine. Endocrine cells distributed in the digestive tract of V. salvator vary in color intensity, from weak to sharp, in response to the primer antibody. Conclusion: Endocrine cells in the digestive tract that is immunoreactive to glucagon, somatostatin, and serotonin are those found in the caudal portion of the small and large intestines. They are varied in distribution pattern, frequency, and color intensity.
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Affiliation(s)
- Mahfud Mahfud
- Department of Biology Education, University of Muhammadiyah Kupang, East of Nusa Tenggara Province, Indonesia
| | - Ernawati Ernawati
- Department of Biology Education, University of Muhammadiyah Kupang, East of Nusa Tenggara Province, Indonesia
| | - Nur R Adawiyah Mahmud
- Department of Biology Education, University of Muhammadiyah Kupang, East of Nusa Tenggara Province, Indonesia
| | - Teguh Budipitojo
- Department of Veterinary Anatomy, Faculty of Veterinary Medicine, Gajah Mada University, Yogyakarta, Indonesia
| | - Hery Wijayanto
- Department of Veterinary Anatomy, Faculty of Veterinary Medicine, Gajah Mada University, Yogyakarta, Indonesia
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Firmiano EMS, Cardoso NN, Sales A, Santos MAJ, Mendes ALS, Nascimento AA. Immunohistochemical study of the six types of endocrine cells in the enteropancreatic system of the lizard Tropidurus torquatus (Squamata: Tropiduridae). THE EUROPEAN ZOOLOGICAL JOURNAL 2017. [DOI: 10.1080/24750263.2017.1330429] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Affiliation(s)
- E. M. S. Firmiano
- Postgraduation Program in Animal Biology, Federal Rural University of Rio de Janeiro, Seropédica, Rio de Janeiro, Brazil
| | - N. N. Cardoso
- Postgraduation Program in Animal Biology, Federal Rural University of Rio de Janeiro, Seropédica, Rio de Janeiro, Brazil
| | - A. Sales
- Science Institute of Biological and Health; Histology and Embryology Field, Animal Biology Department, Federal Rural University of Rio de Janeiro, Seropédica, Rio de Janeiro, Seropédica, Rio de Janeiro, Brazil
| | - M. A. J. Santos
- Science Institute of Biological and Health; Histology and Embryology Field, Animal Biology Department, Federal Rural University of Rio de Janeiro, Seropédica, Rio de Janeiro, Seropédica, Rio de Janeiro, Brazil
| | - A. L. S. Mendes
- Science Institute of Biological and Health; Histology and Embryology Field, Animal Biology Department, Federal Rural University of Rio de Janeiro, Seropédica, Rio de Janeiro, Seropédica, Rio de Janeiro, Brazil
| | - A. A. Nascimento
- Science Institute of Biological and Health; Histology and Embryology Field, Animal Biology Department, Federal Rural University of Rio de Janeiro, Seropédica, Rio de Janeiro, Seropédica, Rio de Janeiro, Brazil
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Pereira JG, Silva SR, Gonçalves MTC, Melo FA, Viana DC, Oliveira AS, Machado CR. IMUNOLOCALIZAÇÃO DE ENTEROGLUCAGON EM CÉLULAS ENDÓCRINAS PRESENTES NO ESTÔMAGO DO MUÇUÃ <italic>Kinosternon scorpioides</italic> (REPTILIA, CHELONIA, KINOSTERNIDAE). CIÊNCIA ANIMAL BRASILEIRA 2015. [DOI: 10.1590/1089-6891v16i330969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
<title>Resumo:</title><p>O muçuã ou jurará (<italic>Kinosternon scorpioides</italic>) é um quelônio de pequeno porte de água doce, nativo das varzéas da região amazônica. Essa espécie é importante fonte de alimentação e renda e vem sendo estudada por apresentar vulnerabilidade em consequência da caça indiscriminada, queimadas e desmatamento e, por esta razão, tem sido fonte de pesquisa para o fornecimento de dados para a preservação da espécie. Ainda não é totalmente compreendida a atividade imunohistoquímica das células endócrinas presentes no estômago do muçuã. Sendo assim, este trabalho tem por objetivo identificar a presença do hormônio enteroglucagon e classificar as células endócrinas do estômago de muçuã. Os fragmentos de estômago foram submetidos à técnica de Hematoxilina-Eosina e da Estreptovidina peroxidase para coloração e detecção do antígeno, respectivamente. Foram encontradas células imunorreativas ao enteroglucagon em uma das três porções gástricas (cárdica, fúndica e pilórica); contudo, nas duas primeiras regiões, a imunoreatividade foi mais evidente do que na última. As células endócrinas do estômago de muçuã foram classificadas em argirófilas e argentafins e encontradas entre as células que compõem as glândulas gástricas, sendo classificadas como do "tipo aberta" e do "tipo fechada". Não houve diferença bioquímica e imunohistoquímica entre o enteroglucagon do <italic>K. scorpioides</italic> com as de outras espécies animais.</p>
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Zhang AQ, Li XL, Jiang CY, Lin L, Shi RH, Chen JD, Oomura Y. Expression of nesfatin-1/NUCB2 in rodent digestive system. World J Gastroenterol 2010; 16:1735-41. [PMID: 20380005 PMCID: PMC2852821 DOI: 10.3748/wjg.v16.i14.1735] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To observe the regional distributions and morphological features of nesfatin-1/nucleobindin-2 (NUCB2) immunoreactive (IR) cells in the rodent digestive system.
METHODS: Paraffin-embedded sections of seven organs (pancreas, stomach, duodenum, esophagus, liver, small intestine and colon) dissected from sprague-dawley (SD) rats and institute of Cancer Research (ICR) mice were prepared. The regional distributions of nesfatin-1/NUCB2 IR cells were observed by immunohistochemical staining. The morphological features of the nesfatin-1/NUCB2 IR cells were evaluated by hematoxylin and eosin (HE) staining. Fresh tissues of the seven organs were prepared for Western blotting to analyze the relative protein levels of NUCB2 in each organ.
RESULTS: Immunohistochemical staining showed that the nesfatin-1/NUCB2 IR cells were localized in the central part of the pancreatic islets, the lower third and middle portion of the gastric mucosal gland, and the submucous layer of the duodenum in SD rats and ICR mice. HE staining revealed that the morphological features of nesfatin-1/NUCB2 IR cells were mainly islet cells in the pancreas, endocrine cells in the stomach, and Brunner’s glands in the duodenum. Western blotting revealed that NUCB2 protein expression was higher in the pancreas, stomach and duodenum than in the esophagus, liver, small intestine and colon (P = 0.000).
CONCLUSION: Nesfatin-1/NUCB2 IR cells are expressed in the pancreas, stomach and duodenum in rodents. These cells may play an important role in the physiological regulation of carbohydrate metabolism, gastrointestinal function and nutrient absorption.
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Distributions of the endocrine cells in the gastrointestinal tract of nectarivorous and sanguivorous bats: a comparative immunocytochemical study. Tissue Cell 2009; 41:222-9. [PMID: 19135221 DOI: 10.1016/j.tice.2008.11.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2008] [Revised: 11/06/2008] [Accepted: 11/12/2008] [Indexed: 11/24/2022]
Abstract
The present study was conducted to clarify the influence of feeding habits on regional distribution and relative frequency of endocrine cells secreting cholecystokinin (CCK), gastrin (GAS), serotonin (5-HT) and enteroglucagon (GLUC) in the nectarivorous Anoura geoffroyi and Glossophaga soricina and the sanguivorous Desmodus rotundus bats of the Phyllostomidae family, by specific immunohistochemical methods. The regional distribution and frequency of the different types of endocrine cells varied according to their location in the GIT. 5-HT immunoreactive cells (IR), detected throughout the GIT of three bats, were the most predominant gastrointestinal endocrine cells. GAS-IR cells in A. geoffroyi were found at the base of the pyloric gland, while in G. soricina they could also be observed in the middle to basal portions of the gland. GLUC-IR cells were located in the fundic region of A. geoffroyi, G. soricina and D. rotundus. These endocrine cells were more abundant in the sanguivorous bat. In nectarivorous bats were compared to sanguivorous bat, which differ in dietary habits, difference in the distribution and relative frequency of gut endocrine cells would be predicted. The absence of some, and decrease in frequency of other, gastrointestinal endocrine cells may reflect, in part, its interspecies differences or dietary habits.
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Dos Santos CM, Do Nascimento AA, Peracchi AL, Dias D, Ribeiro TP, Sales A. A comparative immunohistochemical study of endocrine cells in the digestive tract of two frugivorous bats: Artibeus cinerius and Sturnira lilium. Acta Histochem 2008; 110:134-42. [PMID: 18068220 DOI: 10.1016/j.acthis.2007.10.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2007] [Revised: 09/14/2007] [Accepted: 10/01/2007] [Indexed: 12/26/2022]
Abstract
The purpose of the present study was to examine the serotonin (5-hydroxytryptamine, 5-HT), gastrin (GAS), cholecystokinin (CCK) and glucagon (GLUC) endocrine cells in the gastrointestinal tract of frugivorous Phillostomidae bats, Sturnira lilium and Artibeus cinerius, to clarify the correlation between distribution of cell types and their relative frequency, with feeding habits. Five portions of the gastrointestinal tract--fundus, pilorus, and three parts of the intestine, I, II and III--were examined. Most of the immunoreactive cells in the stomach and intestine were of triangular, oval or piriform shape. Serotonin-immunoreactive cells were most commonly found in the S. lilium intestine I (66.6+/-9.9) and the A. cinerius intestine III (35+/-18). Gastrin-immunoreactive cells were the most abundant cell type in the pyloric glands of both species. They were more numerous in A. cinerius (126.9+/-27.4) than in S. lilium (75.8+/-1.8). CCK-immunoreactive cells were found in the alimentary tract epithelia at moderate frequencies in both species. GLUC-immunoreactive cells were detected at very low or low frequencies. This study suggests that there is a correlation between endocrine cell distribution and frequency, and the feeding habits of the bats.
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