Term placenta of the southern elephant seal (Mirounga leonina)

Diessler, Mónica Elizabeth; Migliorisi, Ana Lorena; Castro, Gimena Gomez; Favaron, Phelipe Oliveira; Zanuzzi, Carolina Natalia; Negrete, Javier; Miglino, Maurizio; Barbeito, Claudio Gustavo

doi:10.1016/j.placenta.2020.07.031

Cited by 3 publications

(6 citation statements)

References 26 publications

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“…In the cat, α-SMA has been detected in decidualized cells both in the labyrinth and in the junctional zone ( Walter and Schönkypl, 2006 ; Hernández et al, 2017 ) ( Figures 1E , 3B–D ). In minks and Southern elephant seals perivascular cells share this pattern (see 2.2) ( Winther H et al, 1999 ; Diessler et al, 2020 ). DSCs of the bitch were also positive for desmin ( Vermeirsch et al, 2000 ; Hernández et al, 2017 ) ( Figure 1 ), whereas in the queen DSCs were negative, at least in >45 days post coitum (dpc) placentas ( Fernández et al, 2014 ).…”

Section: Dscs In Carnivoramentioning

confidence: 87%

“…Within this suborder, microscopical studies of the placenta of seven families have been published. There are reports on Ailuridae ( Benirschke, 2011 ), Mustelidae ( Rau, 1925 ; Wislocki and Amoroso, 1956 ; Lawn AM and Chiquoine AD, 1965 ; Pfarrer et al, 1999 ; Winther H et al, 1999 ; Lindeberg, 2008 ), Otariidae and Phocidae ( Harrison and Young, 1966 ; Sinha and Erickson, 1974 ; Diessler et al, 2020 ; Gomez Castro et al, 2022b ; Hernández et al, 2022 ), Procyonidae ( Creed and Biggers, 1963 ; Favaron et al, 2014 ), Ursidae ( Rau, 1925 ; Young, 1969 ; Wimsatt, 1974 ), and Canidae ( Kehrer, 1973 ; Zybina et al, 2001 ; main citations about Canis lupus familiaris are registered in Section 2.2.1 ).…”

Section: Dscs In Carnivoramentioning

confidence: 99%

“…Only in the American mink ( Neogale vison , formerly Mustela vison ) and in the Southern elephant seal ( Mirounga leonina ), vimentin and α-SMA positive periendothelial cells have been reported ( Winther H et al, 1999 ; Diessler et al, 2020 ).…”

Section: Dscs In Carnivoramentioning

confidence: 99%

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Decidual cells and decidualization in the carnivoran endotheliochorial placenta

Diessler

Hernández²,

Castro³

et al. 2023

Front. Cell Dev. Biol.

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Decidualization is considered a distinctive feature of eutherian pregnancy, and has appeared during evolution along with the development of invasive forms of placentation, as the endotheliochorial placenta. Although decidualization is not massive in carnivores, as it is in most species developing hemochorial placentas, isolated or grouped cells regarded as decidual have been documented and characterized, mainly in bitches and queens. For the majority of the remaining species of the order, data in the bibliography are fragmentary. In this article, general morphological aspects of decidual stromal cells (DSCs), their time of appearance and lasting, data about the expression of cytoskeletal proteins and molecules considered as markers of decidualization were reviewed. From the data reviewed, it follows that carnivoran DSCs take part either in the secretion of progesterone, prostaglandins, relaxin, among other substances, or at least in the signaling pathways triggered by them. Beyond their physiological roles, some of those molecules are already being used, or are yet under study, for the non-invasive endocrine monitoring and reproductive control of domestic and wild carnivores. Only insulin-like growth factor binding protein 1, among the main decidual markers, has been undoubtedly demonstrated in both species. Laminin, on the contrary, was found only in feline DSCs, and prolactin was preliminary reported in dogs and cats. Prolactin receptor, on the other hand, was found in both species. While canine DSCs are the only placental cell type expressing the nuclear progesterone receptor (PGR), that receptor has not been demonstrated neither in feline DSCs, nor in any other cell in the queen placenta, although the use of PGR blockers leads to abortion. Against this background, and from the data gathered so far, it is unquestionable that DSCs in carnivorans do play a pivotal role in placental development and health. The knowledge about placental physiology is critical for medical care and breeding management, primarily in domestic carnivores; it is also absolutely crucial for a conservation approach in the management of endangered carnivore species.

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Section: Dscs In Carnivoramentioning

confidence: 87%

Section: Dscs In Carnivoramentioning

confidence: 99%

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Decidual cells and decidualization in the carnivoran endotheliochorial placenta

Diessler

Hernández²,

Castro³

et al. 2023

Front. Cell Dev. Biol.

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“…The pinnipeds' placenta forms a zonary, an annular lobed band, similar to that of terrestrial carnivores, with labyrinthine arrangements [25]. A distinctive feature of a carnivore placenta is the presence of hemophagous regions of variable size and location, being the gross form very characteristic of the species [25]. These accessory structures constitute specialized areas of extravasated maternal blood, generally stagnant, surrounded by phagocytic trophoblasts.…”

Section: Discussionmentioning

confidence: 99%

Preliminary Ultrasonographic Study of Healthy California Sea Lion (Zalophus californianus) Pregnancy and Fetal Development

Fiorucci,

Grande,

Macrelli

et al. 2024

Animals

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Reproductive success is an important aspect of marine mammals’ population health, as it is an indicator of the trajectory for the population into the future. The aim of this study is to provide additional relevant data on fetus–maternal ultrasonographic monitoring in sea lion species, in order to evaluate possible fetal distress or abnormalities. From 2018 to 2023, serial ultrasonographic scans of two healthy California sea lion females (16 ± 4 years old), kept under human care, were performed over the course of two pregnancies for each female. Animals were monitored from the ovulation to the delivery. Ultrasonography was performed weekly, and, during the last month, daily images were recorded using Logiq Versana Active, General Electric, with a 2–5 MHz curvilinear transducer, and Logiq V2, General Electric, with a 2–5 MHz curvilinear transducer. Right and left lateral recumbencies have been used during the examination. To the author’s knowledge, this is the first study describing in detail the sea lion organogenesis and their correlation with the stage of pregnancy.

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“…However, some specific adaptations were found in a pinniped species that performs long apneas for diving, the southern elephant seal Mirounga leonina . In this species, the placenta is characterized by large maternal sinusoid capillaries and indentations of the cytotrophoblast in the maternal endothelium, adaptations that improve maternal-fetal contact ( Diessler et al, 2020 ). Regarding phenotypic variation as a response to altitude, inter and intraspecific adaptations were studied.…”

mentioning

confidence: 99%

Editorial: Cellular processes in placental morphogenesis

Barbeito,

Miglino

2023

Front. Cell Dev. Biol.

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Term placenta of the southern elephant seal (Mirounga leonina)

Cited by 3 publications

References 26 publications

Decidual cells and decidualization in the carnivoran endotheliochorial placenta

Decidual cells and decidualization in the carnivoran endotheliochorial placenta

Preliminary Ultrasonographic Study of Healthy California Sea Lion (Zalophus californianus) Pregnancy and Fetal Development

Editorial: Cellular processes in placental morphogenesis

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