The vomeronasal organ of the South American armadillo Chaetophractus villosus (Xenarthra, Mammalia): Anatomy, histology and ultrastructure
The vomeronasal organ (VNO) is a chemoreceptive structure that has not been extensively studied in the Xenarthran order. Tissue samples from the VNO of the armadillo Chaetophractus villosus were prepared for light and electron microscopy. The VNO is located in the anterior part of the base of the na...
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todo:paper_00218782_v195_n4_p587_Carmanchahi2023-10-03T14:21:40Z The vomeronasal organ of the South American armadillo Chaetophractus villosus (Xenarthra, Mammalia): Anatomy, histology and ultrastructure Carmanchahi, P.D. Aldana Marcos, H.J. Ferrari, C.C. Affanni, J.M. Chemoreception Jacobson's organ Olfaction Vomeronasal glands acinar cell animal tissue armadillo article basal cell capillary proliferation cell infiltration cell membrane cell surface cell ultrastructure cell vacuole chemoreceptor ciliated epithelium electron microscopy female male membrane binding microvillus nerve cell nerve ending neuroepithelium nonhuman nose cavity nose septum olfactory epithelium plasma cell priority journal pseudopodium secretory cell secretory granule sensory nerve cell vomeronasal organ Animals Armadillos Microscopy, Electron Vomeronasal Organ The vomeronasal organ (VNO) is a chemoreceptive structure that has not been extensively studied in the Xenarthran order. Tissue samples from the VNO of the armadillo Chaetophractus villosus were prepared for light and electron microscopy. The VNO is located in the anterior part of the base of the nasal septum. It is tubular in shape, ~ 18 mm in length and opens in the rostral region of the nasal cavity and with a blind caudal end. Its lumen is lined by sensory (SE) and nonsensory (NSE) epithelium. The SE shows sensory, supporting and basal cells whereas the NSE contains ciliated and nonciliated secretory cells and basal cells. At the ultrastructural level, the sensory cells appear as bipolar neurons with conspicuous microvilli on their free surface. The supporting cells of the SE contain numerous membrane-bound vesicles in their apical regions. A peculiar feature not found in other mammals, is the presence of concentric whorls of RER cisterns frequently observed in their basal expansions. Infiltrating plasma cells can be detected in the SE basal region close to the dorsal junctional area. This region also exhibits an unusual type of basal cell, probably responsible for the generation of new vomeronasal receptor neurons. The ciliated NSE cells exhibit numerous ovoids or irregularly shaped membranous protrusions projecting from the plasma membrane of the cilia. As far as we know, this is the first study reporting the presence of this feature in ciliated NSE cells. The nonciliated cells are characterised by scarce large secretory granules and apical microvilli. The vomeronasal glands are compound-branched tubuloacinar glands with serous acinar cells. Four types of secretory granules are present. The ducts of these glands reach the lumen in the dorsolateral region between the NSE and SE. Hypolemmal nerve terminals were observed contacting secretory cells. Fenestrated and nonfenestrated capillaries constitute the vascular supply to these glands. Plasma cells, intimately associated with acinar cells, were frequently observed. Fil:Carmanchahi, P.D. 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:Ferrari, C.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00218782_v195_n4_p587_Carmanchahi |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Chemoreception Jacobson's organ Olfaction Vomeronasal glands acinar cell animal tissue armadillo article basal cell capillary proliferation cell infiltration cell membrane cell surface cell ultrastructure cell vacuole chemoreceptor ciliated epithelium electron microscopy female male membrane binding microvillus nerve cell nerve ending neuroepithelium nonhuman nose cavity nose septum olfactory epithelium plasma cell priority journal pseudopodium secretory cell secretory granule sensory nerve cell vomeronasal organ Animals Armadillos Microscopy, Electron Vomeronasal Organ |
| spellingShingle |
Chemoreception Jacobson's organ Olfaction Vomeronasal glands acinar cell animal tissue armadillo article basal cell capillary proliferation cell infiltration cell membrane cell surface cell ultrastructure cell vacuole chemoreceptor ciliated epithelium electron microscopy female male membrane binding microvillus nerve cell nerve ending neuroepithelium nonhuman nose cavity nose septum olfactory epithelium plasma cell priority journal pseudopodium secretory cell secretory granule sensory nerve cell vomeronasal organ Animals Armadillos Microscopy, Electron Vomeronasal Organ Carmanchahi, P.D. Aldana Marcos, H.J. Ferrari, C.C. Affanni, J.M. The vomeronasal organ of the South American armadillo Chaetophractus villosus (Xenarthra, Mammalia): Anatomy, histology and ultrastructure |
| topic_facet |
Chemoreception Jacobson's organ Olfaction Vomeronasal glands acinar cell animal tissue armadillo article basal cell capillary proliferation cell infiltration cell membrane cell surface cell ultrastructure cell vacuole chemoreceptor ciliated epithelium electron microscopy female male membrane binding microvillus nerve cell nerve ending neuroepithelium nonhuman nose cavity nose septum olfactory epithelium plasma cell priority journal pseudopodium secretory cell secretory granule sensory nerve cell vomeronasal organ Animals Armadillos Microscopy, Electron Vomeronasal Organ |
| description |
The vomeronasal organ (VNO) is a chemoreceptive structure that has not been extensively studied in the Xenarthran order. Tissue samples from the VNO of the armadillo Chaetophractus villosus were prepared for light and electron microscopy. The VNO is located in the anterior part of the base of the nasal septum. It is tubular in shape, ~ 18 mm in length and opens in the rostral region of the nasal cavity and with a blind caudal end. Its lumen is lined by sensory (SE) and nonsensory (NSE) epithelium. The SE shows sensory, supporting and basal cells whereas the NSE contains ciliated and nonciliated secretory cells and basal cells. At the ultrastructural level, the sensory cells appear as bipolar neurons with conspicuous microvilli on their free surface. The supporting cells of the SE contain numerous membrane-bound vesicles in their apical regions. A peculiar feature not found in other mammals, is the presence of concentric whorls of RER cisterns frequently observed in their basal expansions. Infiltrating plasma cells can be detected in the SE basal region close to the dorsal junctional area. This region also exhibits an unusual type of basal cell, probably responsible for the generation of new vomeronasal receptor neurons. The ciliated NSE cells exhibit numerous ovoids or irregularly shaped membranous protrusions projecting from the plasma membrane of the cilia. As far as we know, this is the first study reporting the presence of this feature in ciliated NSE cells. The nonciliated cells are characterised by scarce large secretory granules and apical microvilli. The vomeronasal glands are compound-branched tubuloacinar glands with serous acinar cells. Four types of secretory granules are present. The ducts of these glands reach the lumen in the dorsolateral region between the NSE and SE. Hypolemmal nerve terminals were observed contacting secretory cells. Fenestrated and nonfenestrated capillaries constitute the vascular supply to these glands. Plasma cells, intimately associated with acinar cells, were frequently observed. |
| format |
JOUR |
| author |
Carmanchahi, P.D. Aldana Marcos, H.J. Ferrari, C.C. Affanni, J.M. |
| author_facet |
Carmanchahi, P.D. Aldana Marcos, H.J. Ferrari, C.C. Affanni, J.M. |
| author_sort |
Carmanchahi, P.D. |
| title |
The vomeronasal organ of the South American armadillo Chaetophractus villosus (Xenarthra, Mammalia): Anatomy, histology and ultrastructure |
| title_short |
The vomeronasal organ of the South American armadillo Chaetophractus villosus (Xenarthra, Mammalia): Anatomy, histology and ultrastructure |
| title_full |
The vomeronasal organ of the South American armadillo Chaetophractus villosus (Xenarthra, Mammalia): Anatomy, histology and ultrastructure |
| title_fullStr |
The vomeronasal organ of the South American armadillo Chaetophractus villosus (Xenarthra, Mammalia): Anatomy, histology and ultrastructure |
| title_full_unstemmed |
The vomeronasal organ of the South American armadillo Chaetophractus villosus (Xenarthra, Mammalia): Anatomy, histology and ultrastructure |
| title_sort |
vomeronasal organ of the south american armadillo chaetophractus villosus (xenarthra, mammalia): anatomy, histology and ultrastructure |
| url |
http://hdl.handle.net/20.500.12110/paper_00218782_v195_n4_p587_Carmanchahi |
| work_keys_str_mv |
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