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Abstract:

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.

Registro:

Documento: Artículo
Título:Olfactory mucosa of the South American armadillo Chaetophractus villosus: An ultrastructural study
Autor:Ferrari, C.C.; Aldana Marcos, H.J.; Carmanchahi, P.D.; Affanni, J.M.
Filiación:Instituto de Neurociencia, Fac. de Ciencias Exactas y Naturales, Ciudad Universitaria, Pab. II, Buenos Aires, Argentina
INEUCI-CONICET, Ciudad Universitaria Pab. II, Lab. 102 (1428), Buenos Aires, Argentina
Palabras clave: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
Año:1998
Volumen:252
Número:3
Página de inicio:325
Página de fin:339
DOI: http://dx.doi.org/10.1002/(SICI)1097-0185(199811)252:3<325::AID-AR1>3.0.CO;2-T
Título revista:Anatomical Record
Título revista abreviado:Anat. Rec.
ISSN:0003276X
CODEN:ANREA
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_0003276X_v252_n3_p325_Ferrari.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0003276X_v252_n3_p325_Ferrari

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Citas:

---------- APA ----------
Ferrari, C.C., Aldana Marcos, H.J., Carmanchahi, P.D. & Affanni, J.M. (1998) . Olfactory mucosa of the South American armadillo Chaetophractus villosus: An ultrastructural study. Anatomical Record, 252(3), 325-339.
http://dx.doi.org/10.1002/(SICI)1097-0185(199811)252:3<325::AID-AR1>3.0.CO;2-T
---------- CHICAGO ----------
Ferrari, C.C., Aldana Marcos, H.J., Carmanchahi, P.D., Affanni, J.M. "Olfactory mucosa of the South American armadillo Chaetophractus villosus: An ultrastructural study" . Anatomical Record 252, no. 3 (1998) : 325-339.
http://dx.doi.org/10.1002/(SICI)1097-0185(199811)252:3<325::AID-AR1>3.0.CO;2-T
---------- MLA ----------
Ferrari, C.C., Aldana Marcos, H.J., Carmanchahi, P.D., Affanni, J.M. "Olfactory mucosa of the South American armadillo Chaetophractus villosus: An ultrastructural study" . Anatomical Record, vol. 252, no. 3, 1998, pp. 325-339.
http://dx.doi.org/10.1002/(SICI)1097-0185(199811)252:3<325::AID-AR1>3.0.CO;2-T
---------- VANCOUVER ----------
Ferrari, C.C., Aldana Marcos, H.J., Carmanchahi, P.D., Affanni, J.M. Olfactory mucosa of the South American armadillo Chaetophractus villosus: An ultrastructural study. Anat. Rec. 1998;252(3):325-339.
http://dx.doi.org/10.1002/(SICI)1097-0185(199811)252:3<325::AID-AR1>3.0.CO;2-T