Olfactory mucosa of the South American armadillo Chaetophractus villosus: An ultrastructural study
The sense of olfaction in armadillos plays an important role, suggested by the great development of the nasal structures, olfactory bulbs, and related brain regions. The mammalian olfactory mucosa is a privileged site of neuronal death and regeneration during the whole life span. A detailed knowledg...
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1998
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paper:paper_0003276X_v252_n3_p325_Ferrari2023-06-08T14:24:16Z Olfactory mucosa of the South American armadillo Chaetophractus villosus: An ultrastructural study Ferrari, Carina Cintia Aldana Marcos, Hernán Javier Carmanchahi, Pablo Daniel Apocrine secretion Apoptosis Armadillo Electron microscopy Olfactory mucosa Supporting cells Xenarthra animal tissue armadillo article cell type cell ultrastructure electron microscopy endoplasmic reticulum histology nonhuman olfactory epithelium phagosome priority journal smelling Animals Apocrine Glands Apoptosis Armadillos Epithelial Cells Female Male Microscopy, Electron Olfactory Mucosa Olfactory Nerve Smell South America Animalia Armadillo Chaetophractus villosus Dasypodidae Edentata Mammalia The sense of olfaction in armadillos plays an important role, suggested by the great development of the nasal structures, olfactory bulbs, and related brain regions. The mammalian olfactory mucosa is a privileged site of neuronal death and regeneration during the whole life span. A detailed knowledge of its ultrastructure is convenient for gaining insight into the factors controlling those phenomena. We performed this work in species not previously studied in order to provide a firm basis for further research on those factors. No information is available on the histology and ultrastructure of the olfactory mucosa in the order Xenarthra to which armadillos belong. Samples from the endoturbinals of the armadillo Chaetophractus villosus were prepared for light and electron microscopic examination by the usual conventional means. The olfactory epithelium of Chaetophractus villosus shows the classical three types of cells: supporting cells, olfactory receptor neurons, and basal cells. The olfactory neurons and the basal cells were similar to that described in other species. Two different types of supporting cells are described. An outstanding characteristic of the supporting cells is the normal presence of abundant phagosomes, apical secretory granules, apocrine-like protrusions, and highly developed smooth endoplasmic reticulum. Apoptotic bodies are frequently found in the infranuclear cytoplasm of supporting cells. The ductular epithelium of Bowman's glands reveals secretory activity. The lamina propria shows mixed Bowman's glands. Great development of smooth endoplasmic reticulum is observed in the mucous acinar cells. Evidence for merocrine and apocrine mechanisms in the Bowman's glands is presented. The presence of apoptotic bodies and phagosomes in supporting cells suggests a participation in the cellular events induced by cell death and proliferation of the olfactory epithelium. The variety of characteristics exhibited by the supporting cells of the olfactory mucosa may contribute to a deeper understanding of their scarcely known functions. Fil:Ferrari, C.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Aldana Marcos, H.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Carmanchahi, P.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1998 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0003276X_v252_n3_p325_Ferrari http://hdl.handle.net/20.500.12110/paper_0003276X_v252_n3_p325_Ferrari |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Apocrine secretion Apoptosis Armadillo Electron microscopy Olfactory mucosa Supporting cells Xenarthra animal tissue armadillo article cell type cell ultrastructure electron microscopy endoplasmic reticulum histology nonhuman olfactory epithelium phagosome priority journal smelling Animals Apocrine Glands Apoptosis Armadillos Epithelial Cells Female Male Microscopy, Electron Olfactory Mucosa Olfactory Nerve Smell South America Animalia Armadillo Chaetophractus villosus Dasypodidae Edentata Mammalia |
spellingShingle |
Apocrine secretion Apoptosis Armadillo Electron microscopy Olfactory mucosa Supporting cells Xenarthra animal tissue armadillo article cell type cell ultrastructure electron microscopy endoplasmic reticulum histology nonhuman olfactory epithelium phagosome priority journal smelling Animals Apocrine Glands Apoptosis Armadillos Epithelial Cells Female Male Microscopy, Electron Olfactory Mucosa Olfactory Nerve Smell South America Animalia Armadillo Chaetophractus villosus Dasypodidae Edentata Mammalia Ferrari, Carina Cintia Aldana Marcos, Hernán Javier Carmanchahi, Pablo Daniel Olfactory mucosa of the South American armadillo Chaetophractus villosus: An ultrastructural study |
topic_facet |
Apocrine secretion Apoptosis Armadillo Electron microscopy Olfactory mucosa Supporting cells Xenarthra animal tissue armadillo article cell type cell ultrastructure electron microscopy endoplasmic reticulum histology nonhuman olfactory epithelium phagosome priority journal smelling Animals Apocrine Glands Apoptosis Armadillos Epithelial Cells Female Male Microscopy, Electron Olfactory Mucosa Olfactory Nerve Smell South America Animalia Armadillo Chaetophractus villosus Dasypodidae Edentata Mammalia |
description |
The sense of olfaction in armadillos plays an important role, suggested by the great development of the nasal structures, olfactory bulbs, and related brain regions. The mammalian olfactory mucosa is a privileged site of neuronal death and regeneration during the whole life span. A detailed knowledge of its ultrastructure is convenient for gaining insight into the factors controlling those phenomena. We performed this work in species not previously studied in order to provide a firm basis for further research on those factors. No information is available on the histology and ultrastructure of the olfactory mucosa in the order Xenarthra to which armadillos belong. Samples from the endoturbinals of the armadillo Chaetophractus villosus were prepared for light and electron microscopic examination by the usual conventional means. The olfactory epithelium of Chaetophractus villosus shows the classical three types of cells: supporting cells, olfactory receptor neurons, and basal cells. The olfactory neurons and the basal cells were similar to that described in other species. Two different types of supporting cells are described. An outstanding characteristic of the supporting cells is the normal presence of abundant phagosomes, apical secretory granules, apocrine-like protrusions, and highly developed smooth endoplasmic reticulum. Apoptotic bodies are frequently found in the infranuclear cytoplasm of supporting cells. The ductular epithelium of Bowman's glands reveals secretory activity. The lamina propria shows mixed Bowman's glands. Great development of smooth endoplasmic reticulum is observed in the mucous acinar cells. Evidence for merocrine and apocrine mechanisms in the Bowman's glands is presented. The presence of apoptotic bodies and phagosomes in supporting cells suggests a participation in the cellular events induced by cell death and proliferation of the olfactory epithelium. The variety of characteristics exhibited by the supporting cells of the olfactory mucosa may contribute to a deeper understanding of their scarcely known functions. |
author |
Ferrari, Carina Cintia Aldana Marcos, Hernán Javier Carmanchahi, Pablo Daniel |
author_facet |
Ferrari, Carina Cintia Aldana Marcos, Hernán Javier Carmanchahi, Pablo Daniel |
author_sort |
Ferrari, Carina Cintia |
title |
Olfactory mucosa of the South American armadillo Chaetophractus villosus: An ultrastructural study |
title_short |
Olfactory mucosa of the South American armadillo Chaetophractus villosus: An ultrastructural study |
title_full |
Olfactory mucosa of the South American armadillo Chaetophractus villosus: An ultrastructural study |
title_fullStr |
Olfactory mucosa of the South American armadillo Chaetophractus villosus: An ultrastructural study |
title_full_unstemmed |
Olfactory mucosa of the South American armadillo Chaetophractus villosus: An ultrastructural study |
title_sort |
olfactory mucosa of the south american armadillo chaetophractus villosus: an ultrastructural study |
publishDate |
1998 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0003276X_v252_n3_p325_Ferrari http://hdl.handle.net/20.500.12110/paper_0003276X_v252_n3_p325_Ferrari |
work_keys_str_mv |
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_version_ |
1768543491771596800 |