Term placenta of the southern elephant seal (Mirounga leonina)
Introduction: The pinnipeds’ placenta has been described as zonary, annular, labyrinthic and endotheliochorial, like that of the terrestrial carnivores. This article describes the placenta of Mirounga leonina, a phocid pinniped, focusing on some morphological features related to fetal nutrition. Met...
Published in: | Placenta |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
W B Saunders Co Ltd
|
Subjects: | |
Online Access: | http://hdl.handle.net/11336/174241 |
id |
ftconicet:oai:ri.conicet.gov.ar:11336/174241 |
---|---|
record_format |
openpolar |
spelling |
ftconicet:oai:ri.conicet.gov.ar:11336/174241 2023-10-09T21:47:09+02:00 Term placenta of the southern elephant seal (Mirounga leonina) Diessler, Mónica Elizabeth Migliorisi, Ana Lorena Gomez Castro, María Gimena Favaron, Phelipe Oliveira Zanuzzi, Carolina Natalia Negrete, Javier Miglino, María Angélica Barbeito, Claudio Gustavo application/pdf http://hdl.handle.net/11336/174241 eng eng W B Saunders Co Ltd info:eu-repo/semantics/altIdentifier/doi/10.1016/j.placenta.2020.07.031 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0143400420302496 http://hdl.handle.net/11336/174241 Diessler, Mónica Elizabeth; Migliorisi, Ana Lorena; Gomez Castro, María Gimena; Favaron, Phelipe Oliveira; Zanuzzi, Carolina Natalia; et al.; Term placenta of the southern elephant seal (Mirounga leonina); W B Saunders Co Ltd; Placenta; 100; 10-2020; 24-29 0143-4004 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ PINNIPED SOUTHERN ELEPHANT PLACENTA ENDOTHELIOCHORIAL DECIDUAL https://purl.org/becyt/ford/4.3 https://purl.org/becyt/ford/4 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.placenta.2020.07.031 2023-09-24T19:59:57Z Introduction: The pinnipeds’ placenta has been described as zonary, annular, labyrinthic and endotheliochorial, like that of the terrestrial carnivores. This article describes the placenta of Mirounga leonina, a phocid pinniped, focusing on some morphological features related to fetal nutrition. Methods: Placental samples from three elephant seals were collected and conditioned after natural delivery at the Antarctic Specially Protected Area 132. Histological and ultrastructural studies were conducted; cytokeratins, vimentin, α-smooth muscle actin, and desmin proteins were detected using immunohistochemistry. Results: The placentas were zonary, lobed, belt-shaped, and showed multiple vivid orange areas, which corresponded to bilirubin crystalline pigment found among chorionic villi and inside trophoblast cells. In the labyrinth, cytotrophoblast cells were isolated and there was a scant syncytium interposed between maternal and fetal vessels. Fetal vessels were small, round, and frequently intratrophoblastic, while maternal vessels were large, irregular, sinuous, and thin-walled. Vimentin and actin were detected in some scattered non-vascular cells throughout the labyrinth. Broad areas of degenerated and necrotic maternal components were also observed. Discussion: The placentas of pinniped and fissiped carnivores share several traits. However, some remarkable features might maximize respiratory efficiency, collaborating to endure deep-diving hypoxia. Some of them, as the notably large sinuous maternal capillaries and fetal capillary indentation into the syncytium, are shared, e.g., by Phocidae and Mustelidae. Besides hemotropic nutrition taking place through an extremely narrow barrier, the abundant necrotic material and hematic products might allow substantial endocytosis of detritus even in term placentas, in this species giving birth to precocious offspring. Fil: Diessler, Mónica Elizabeth. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; Argentina Fil: Migliorisi, Ana Lorena. ... Article in Journal/Newspaper Antarc* Antarctic Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Argentina Labyrinth ENVELOPE(160.833,160.833,-77.550,-77.550) Mónica ENVELOPE(-75.533,-75.533,-69.817,-69.817) Placenta 100 24 29 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
PINNIPED SOUTHERN ELEPHANT PLACENTA ENDOTHELIOCHORIAL DECIDUAL https://purl.org/becyt/ford/4.3 https://purl.org/becyt/ford/4 |
spellingShingle |
PINNIPED SOUTHERN ELEPHANT PLACENTA ENDOTHELIOCHORIAL DECIDUAL https://purl.org/becyt/ford/4.3 https://purl.org/becyt/ford/4 Diessler, Mónica Elizabeth Migliorisi, Ana Lorena Gomez Castro, María Gimena Favaron, Phelipe Oliveira Zanuzzi, Carolina Natalia Negrete, Javier Miglino, María Angélica Barbeito, Claudio Gustavo Term placenta of the southern elephant seal (Mirounga leonina) |
topic_facet |
PINNIPED SOUTHERN ELEPHANT PLACENTA ENDOTHELIOCHORIAL DECIDUAL https://purl.org/becyt/ford/4.3 https://purl.org/becyt/ford/4 |
description |
Introduction: The pinnipeds’ placenta has been described as zonary, annular, labyrinthic and endotheliochorial, like that of the terrestrial carnivores. This article describes the placenta of Mirounga leonina, a phocid pinniped, focusing on some morphological features related to fetal nutrition. Methods: Placental samples from three elephant seals were collected and conditioned after natural delivery at the Antarctic Specially Protected Area 132. Histological and ultrastructural studies were conducted; cytokeratins, vimentin, α-smooth muscle actin, and desmin proteins were detected using immunohistochemistry. Results: The placentas were zonary, lobed, belt-shaped, and showed multiple vivid orange areas, which corresponded to bilirubin crystalline pigment found among chorionic villi and inside trophoblast cells. In the labyrinth, cytotrophoblast cells were isolated and there was a scant syncytium interposed between maternal and fetal vessels. Fetal vessels were small, round, and frequently intratrophoblastic, while maternal vessels were large, irregular, sinuous, and thin-walled. Vimentin and actin were detected in some scattered non-vascular cells throughout the labyrinth. Broad areas of degenerated and necrotic maternal components were also observed. Discussion: The placentas of pinniped and fissiped carnivores share several traits. However, some remarkable features might maximize respiratory efficiency, collaborating to endure deep-diving hypoxia. Some of them, as the notably large sinuous maternal capillaries and fetal capillary indentation into the syncytium, are shared, e.g., by Phocidae and Mustelidae. Besides hemotropic nutrition taking place through an extremely narrow barrier, the abundant necrotic material and hematic products might allow substantial endocytosis of detritus even in term placentas, in this species giving birth to precocious offspring. Fil: Diessler, Mónica Elizabeth. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; Argentina Fil: Migliorisi, Ana Lorena. ... |
format |
Article in Journal/Newspaper |
author |
Diessler, Mónica Elizabeth Migliorisi, Ana Lorena Gomez Castro, María Gimena Favaron, Phelipe Oliveira Zanuzzi, Carolina Natalia Negrete, Javier Miglino, María Angélica Barbeito, Claudio Gustavo |
author_facet |
Diessler, Mónica Elizabeth Migliorisi, Ana Lorena Gomez Castro, María Gimena Favaron, Phelipe Oliveira Zanuzzi, Carolina Natalia Negrete, Javier Miglino, María Angélica Barbeito, Claudio Gustavo |
author_sort |
Diessler, Mónica Elizabeth |
title |
Term placenta of the southern elephant seal (Mirounga leonina) |
title_short |
Term placenta of the southern elephant seal (Mirounga leonina) |
title_full |
Term placenta of the southern elephant seal (Mirounga leonina) |
title_fullStr |
Term placenta of the southern elephant seal (Mirounga leonina) |
title_full_unstemmed |
Term placenta of the southern elephant seal (Mirounga leonina) |
title_sort |
term placenta of the southern elephant seal (mirounga leonina) |
publisher |
W B Saunders Co Ltd |
url |
http://hdl.handle.net/11336/174241 |
long_lat |
ENVELOPE(160.833,160.833,-77.550,-77.550) ENVELOPE(-75.533,-75.533,-69.817,-69.817) |
geographic |
Antarctic The Antarctic Argentina Labyrinth Mónica |
geographic_facet |
Antarctic The Antarctic Argentina Labyrinth Mónica |
genre |
Antarc* Antarctic Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal |
genre_facet |
Antarc* Antarctic Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.placenta.2020.07.031 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0143400420302496 http://hdl.handle.net/11336/174241 Diessler, Mónica Elizabeth; Migliorisi, Ana Lorena; Gomez Castro, María Gimena; Favaron, Phelipe Oliveira; Zanuzzi, Carolina Natalia; et al.; Term placenta of the southern elephant seal (Mirounga leonina); W B Saunders Co Ltd; Placenta; 100; 10-2020; 24-29 0143-4004 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.placenta.2020.07.031 |
container_title |
Placenta |
container_volume |
100 |
container_start_page |
24 |
op_container_end_page |
29 |
_version_ |
1779309959584940032 |