Identification of enteroendocrine cells of Tropidurus torquatus and Salvator merianae (Squamata: Lacertilia)

Autores
Barbosa Lopes, Fernanda; Assis Rodrigues, Maria Luiza; Souza Silva, Carlos Henrique de; Souza Rodrigues Sartori, Sirlene
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Squamata lizards Tropiduros torquatus and Salvator merianae are omnivores with different diets and foraging strategies, which requires adequate physiological responses of enteroendocrine cells, since they control digestive events, gastrointestinal epithelium renewal, metabolism and food intake. Thus, we aim to describe the distribution and frequency of enteroendocrine cells in the digestive tract of these two lizard’s species. Five individuals of each species were collected, euthanized and the digestive organs removed. Histological sections were submitted to the techniques of Grimelius for argyrophilic cells and Masson-Fontana for argentaffin cells. Both endocrine cells were found in the lining and glandular epithelium, with a pyramidal, oval, rounded, or elongated shape. Argyrophilic cells were observed in both species, predominantly in the stomach, but absent in the cranial esophagus. Argentaffin cells were distributed in almost the entire digestive tract but absent in the cranial portion of the esophagus and small intestine in both species, and with high frequency in the T. torquatus pyloric region. The absence of argentaffin cells in the cranial portion of the small intestine is intriguing and may reveal greater neural control over certain secretomotor functions involving this segment. We concluded that the inter-specific and inter-regional variations in the distribution and frequency of these cells may reflect the regulatory functions and mechanisms of each organ, taking also into account the oscillations of the food and nutritional status of animals in the wild.
Os lagartos Squamata Tropiduros torquatus e Salvator merianae são onívoros com diferentes dietas e estratégias de forrageamento, o que requer respostas fisiológicas adequadas de células enteroendócrinas, uma vez que estas controlam os eventos digestivos, a renovação do epitélio gastrointestinal, o metabolismo e a ingestão alimentar. Portanto, pretendemos descrever a distribuição e frequência de células enteroendócrinas no trato digestivo destas duas espécies de lagartos. Foram coletados cinco indivíduos de cada espécie, eutanasiados e os órgãos digestivos removidos. Seções histológicas foram submetidas às técnicas de Grimelius para células argirófilas e Masson-Fontana para células argentafins. Ambas as células endócrinas foram encontradas no epitélio de revestimento e glandular, com formatos piramidal, oval, arredondado ou alongado. Células argirófilas foram observadas em ambas as espécies, predominantemente no estômago, mas ausentes no esôfago craniano. As células argentafins estiveram distribuídas em quase todo o trato digestivo, mas ausentes na porção cranial do esôfago e intestino delgado em ambas as espécies, e com alta frequência na região pilórica de T. torquatus. A predominância das células endócrinas no estômago pode estar relacionada, por exemplo, à maior permanência do alimento neste órgão, ao contrário do esôfago. A ausência de células argentafins na porção cranial do intestino delgado é intrigante e pode revelar maior controle neural sobre certas funções secretomotoras envolvendo este segmento. Nós concluímos que as variações inter-específicas e interregionais na distribuição e frequência destas células podem refletir as funções e mecanismos regulatórios de cada órgão, levando-se também em conta as oscilações do estado alimentar e nutricional dos animais na natureza.
Asociación Herpetológica Argentina
Materia
Zoología
Diet
Argentaffin cells
Argyrophilic cells
Histology
Morpho-physiology
Reptiles
Dieta
Células argentafins
Células argirófilas
Histología
Morfofísiologia
Répteis
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc/2.5/ar/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/120237

id SEDICI_a04eaa27168746968a0ba4e78cf27d3c
oai_identifier_str oai:sedici.unlp.edu.ar:10915/120237
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Identification of enteroendocrine cells of Tropidurus torquatus and Salvator merianae (Squamata: Lacertilia)Barbosa Lopes, FernandaAssis Rodrigues, Maria LuizaSouza Silva, Carlos Henrique deSouza Rodrigues Sartori, SirleneZoologíaDietArgentaffin cellsArgyrophilic cellsHistologyMorpho-physiologyReptilesDietaCélulas argentafinsCélulas argirófilasHistologíaMorfofísiologiaRépteisThe Squamata lizards Tropiduros torquatus and Salvator merianae are omnivores with different diets and foraging strategies, which requires adequate physiological responses of enteroendocrine cells, since they control digestive events, gastrointestinal epithelium renewal, metabolism and food intake. Thus, we aim to describe the distribution and frequency of enteroendocrine cells in the digestive tract of these two lizard’s species. Five individuals of each species were collected, euthanized and the digestive organs removed. Histological sections were submitted to the techniques of Grimelius for argyrophilic cells and Masson-Fontana for argentaffin cells. Both endocrine cells were found in the lining and glandular epithelium, with a pyramidal, oval, rounded, or elongated shape. Argyrophilic cells were observed in both species, predominantly in the stomach, but absent in the cranial esophagus. Argentaffin cells were distributed in almost the entire digestive tract but absent in the cranial portion of the esophagus and small intestine in both species, and with high frequency in the T. torquatus pyloric region. The absence of argentaffin cells in the cranial portion of the small intestine is intriguing and may reveal greater neural control over certain secretomotor functions involving this segment. We concluded that the inter-specific and inter-regional variations in the distribution and frequency of these cells may reflect the regulatory functions and mechanisms of each organ, taking also into account the oscillations of the food and nutritional status of animals in the wild.Os lagartos Squamata Tropiduros torquatus e Salvator merianae são onívoros com diferentes dietas e estratégias de forrageamento, o que requer respostas fisiológicas adequadas de células enteroendócrinas, uma vez que estas controlam os eventos digestivos, a renovação do epitélio gastrointestinal, o metabolismo e a ingestão alimentar. Portanto, pretendemos descrever a distribuição e frequência de células enteroendócrinas no trato digestivo destas duas espécies de lagartos. Foram coletados cinco indivíduos de cada espécie, eutanasiados e os órgãos digestivos removidos. Seções histológicas foram submetidas às técnicas de Grimelius para células argirófilas e Masson-Fontana para células argentafins. Ambas as células endócrinas foram encontradas no epitélio de revestimento e glandular, com formatos piramidal, oval, arredondado ou alongado. Células argirófilas foram observadas em ambas as espécies, predominantemente no estômago, mas ausentes no esôfago craniano. As células argentafins estiveram distribuídas em quase todo o trato digestivo, mas ausentes na porção cranial do esôfago e intestino delgado em ambas as espécies, e com alta frequência na região pilórica de T. torquatus. A predominância das células endócrinas no estômago pode estar relacionada, por exemplo, à maior permanência do alimento neste órgão, ao contrário do esôfago. A ausência de células argentafins na porção cranial do intestino delgado é intrigante e pode revelar maior controle neural sobre certas funções secretomotoras envolvendo este segmento. Nós concluímos que as variações inter-específicas e interregionais na distribuição e frequência destas células podem refletir as funções e mecanismos regulatórios de cada órgão, levando-se também em conta as oscilações do estado alimentar e nutricional dos animais na natureza.Asociación Herpetológica Argentina2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf97-107http://sedici.unlp.edu.ar/handle/10915/120237enginfo:eu-repo/semantics/altIdentifier/url/https://ppct.caicyt.gov.ar/index.php/cuadherpetol/article/view/18906info:eu-repo/semantics/altIdentifier/issn/1852-5768info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc/2.5/ar/Creative Commons Attribution-NonCommercial 2.5 Argentina (CC BY-NC 2.5)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:28:25Zoai:sedici.unlp.edu.ar:10915/120237Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:28:25.785SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Identification of enteroendocrine cells of Tropidurus torquatus and Salvator merianae (Squamata: Lacertilia)
title Identification of enteroendocrine cells of Tropidurus torquatus and Salvator merianae (Squamata: Lacertilia)
spellingShingle Identification of enteroendocrine cells of Tropidurus torquatus and Salvator merianae (Squamata: Lacertilia)
Barbosa Lopes, Fernanda
Zoología
Diet
Argentaffin cells
Argyrophilic cells
Histology
Morpho-physiology
Reptiles
Dieta
Células argentafins
Células argirófilas
Histología
Morfofísiologia
Répteis
title_short Identification of enteroendocrine cells of Tropidurus torquatus and Salvator merianae (Squamata: Lacertilia)
title_full Identification of enteroendocrine cells of Tropidurus torquatus and Salvator merianae (Squamata: Lacertilia)
title_fullStr Identification of enteroendocrine cells of Tropidurus torquatus and Salvator merianae (Squamata: Lacertilia)
title_full_unstemmed Identification of enteroendocrine cells of Tropidurus torquatus and Salvator merianae (Squamata: Lacertilia)
title_sort Identification of enteroendocrine cells of Tropidurus torquatus and Salvator merianae (Squamata: Lacertilia)
dc.creator.none.fl_str_mv Barbosa Lopes, Fernanda
Assis Rodrigues, Maria Luiza
Souza Silva, Carlos Henrique de
Souza Rodrigues Sartori, Sirlene
author Barbosa Lopes, Fernanda
author_facet Barbosa Lopes, Fernanda
Assis Rodrigues, Maria Luiza
Souza Silva, Carlos Henrique de
Souza Rodrigues Sartori, Sirlene
author_role author
author2 Assis Rodrigues, Maria Luiza
Souza Silva, Carlos Henrique de
Souza Rodrigues Sartori, Sirlene
author2_role author
author
author
dc.subject.none.fl_str_mv Zoología
Diet
Argentaffin cells
Argyrophilic cells
Histology
Morpho-physiology
Reptiles
Dieta
Células argentafins
Células argirófilas
Histología
Morfofísiologia
Répteis
topic Zoología
Diet
Argentaffin cells
Argyrophilic cells
Histology
Morpho-physiology
Reptiles
Dieta
Células argentafins
Células argirófilas
Histología
Morfofísiologia
Répteis
dc.description.none.fl_txt_mv The Squamata lizards Tropiduros torquatus and Salvator merianae are omnivores with different diets and foraging strategies, which requires adequate physiological responses of enteroendocrine cells, since they control digestive events, gastrointestinal epithelium renewal, metabolism and food intake. Thus, we aim to describe the distribution and frequency of enteroendocrine cells in the digestive tract of these two lizard’s species. Five individuals of each species were collected, euthanized and the digestive organs removed. Histological sections were submitted to the techniques of Grimelius for argyrophilic cells and Masson-Fontana for argentaffin cells. Both endocrine cells were found in the lining and glandular epithelium, with a pyramidal, oval, rounded, or elongated shape. Argyrophilic cells were observed in both species, predominantly in the stomach, but absent in the cranial esophagus. Argentaffin cells were distributed in almost the entire digestive tract but absent in the cranial portion of the esophagus and small intestine in both species, and with high frequency in the T. torquatus pyloric region. The absence of argentaffin cells in the cranial portion of the small intestine is intriguing and may reveal greater neural control over certain secretomotor functions involving this segment. We concluded that the inter-specific and inter-regional variations in the distribution and frequency of these cells may reflect the regulatory functions and mechanisms of each organ, taking also into account the oscillations of the food and nutritional status of animals in the wild.
Os lagartos Squamata Tropiduros torquatus e Salvator merianae são onívoros com diferentes dietas e estratégias de forrageamento, o que requer respostas fisiológicas adequadas de células enteroendócrinas, uma vez que estas controlam os eventos digestivos, a renovação do epitélio gastrointestinal, o metabolismo e a ingestão alimentar. Portanto, pretendemos descrever a distribuição e frequência de células enteroendócrinas no trato digestivo destas duas espécies de lagartos. Foram coletados cinco indivíduos de cada espécie, eutanasiados e os órgãos digestivos removidos. Seções histológicas foram submetidas às técnicas de Grimelius para células argirófilas e Masson-Fontana para células argentafins. Ambas as células endócrinas foram encontradas no epitélio de revestimento e glandular, com formatos piramidal, oval, arredondado ou alongado. Células argirófilas foram observadas em ambas as espécies, predominantemente no estômago, mas ausentes no esôfago craniano. As células argentafins estiveram distribuídas em quase todo o trato digestivo, mas ausentes na porção cranial do esôfago e intestino delgado em ambas as espécies, e com alta frequência na região pilórica de T. torquatus. A predominância das células endócrinas no estômago pode estar relacionada, por exemplo, à maior permanência do alimento neste órgão, ao contrário do esôfago. A ausência de células argentafins na porção cranial do intestino delgado é intrigante e pode revelar maior controle neural sobre certas funções secretomotoras envolvendo este segmento. Nós concluímos que as variações inter-específicas e interregionais na distribuição e frequência destas células podem refletir as funções e mecanismos regulatórios de cada órgão, levando-se também em conta as oscilações do estado alimentar e nutricional dos animais na natureza.
Asociación Herpetológica Argentina
description The Squamata lizards Tropiduros torquatus and Salvator merianae are omnivores with different diets and foraging strategies, which requires adequate physiological responses of enteroendocrine cells, since they control digestive events, gastrointestinal epithelium renewal, metabolism and food intake. Thus, we aim to describe the distribution and frequency of enteroendocrine cells in the digestive tract of these two lizard’s species. Five individuals of each species were collected, euthanized and the digestive organs removed. Histological sections were submitted to the techniques of Grimelius for argyrophilic cells and Masson-Fontana for argentaffin cells. Both endocrine cells were found in the lining and glandular epithelium, with a pyramidal, oval, rounded, or elongated shape. Argyrophilic cells were observed in both species, predominantly in the stomach, but absent in the cranial esophagus. Argentaffin cells were distributed in almost the entire digestive tract but absent in the cranial portion of the esophagus and small intestine in both species, and with high frequency in the T. torquatus pyloric region. The absence of argentaffin cells in the cranial portion of the small intestine is intriguing and may reveal greater neural control over certain secretomotor functions involving this segment. We concluded that the inter-specific and inter-regional variations in the distribution and frequency of these cells may reflect the regulatory functions and mechanisms of each organ, taking also into account the oscillations of the food and nutritional status of animals in the wild.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/120237
url http://sedici.unlp.edu.ar/handle/10915/120237
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://ppct.caicyt.gov.ar/index.php/cuadherpetol/article/view/18906
info:eu-repo/semantics/altIdentifier/issn/1852-5768
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc/2.5/ar/
Creative Commons Attribution-NonCommercial 2.5 Argentina (CC BY-NC 2.5)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc/2.5/ar/
Creative Commons Attribution-NonCommercial 2.5 Argentina (CC BY-NC 2.5)
dc.format.none.fl_str_mv application/pdf
97-107
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
_version_ 1844616162861645824
score 13.070432