Review: Exploration of placentation from human beings to ocean-living species

Soma, Hiroaki; Murai, Noriko; Tanaka, Kayoko; Oguro, Tatsuo; Kokuba, Hiroko; Yoshihama, Isao; Fujita, Koji; Mineo, Shoichiro; Toda, Minoru; Uchida, Senzo; Mogoe, Toshihiro

doi:10.1016/j.placenta.2012.11.021

Cited by 16 publications

(12 citation statements)

References 11 publications

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“…Placentation presents a remarkable phenotypic diversity between different eutherian (placental) mammals ( 5 ). This variation is often attributed to the fact that placentation involves the interaction of genetically distinct maternal and fetal tissues ( 6 – 8 ). The maternal–fetal interface is classified by the depth of invasion into the endometrium as epitheliochorial (e.g., cattle and dugong), endotheliochorial (e.g., dogs, cats, and other carnivores), and hemochorial (e.g., humans and other primates, and rodents) ( 9 – 11 ).…”

mentioning

confidence: 99%

Tracing the cis-regulatory changes underlying the endometrial control of placental invasion

Suhail

Maziarz

Novin

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

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Significance Cellular invasion into adjacent tissue is observed in pregnancy, where the fetal placenta invades the mother’s endometrium, and in cancer, where tumor dissemination into stroma is a necessary step before metastasis. The behavior of the surrounding tissue, and its role in either facilitating or resisting this invasion, has not been as deeply studied as the role of the invading cells. The degree of placental invasion into the endometrium varies significantly between different eutherian mammals. Having previously shown that the endometrium of different mammals is significantly responsible for these differences, we identify cis-regulatory elements underlying these differences and show the functional effect of the corresponding transcriptional factors in regulating invasion.

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mentioning

confidence: 99%

Tracing the cis-regulatory changes underlying the endometrial control of placental invasion

Suhail

Maziarz

Novin

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

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“…Precise detection of each component of the fluid has not yet been completed, but histochemical staining suggests that the uterine epithelium of villous strings are implicated in the secretion of lipid droplets and at least two types of PAS-positive granular and fluid substances. The lipid secretions in the white shark were highly active and resembled those from the trophonemata of pregnant manta rays ( Soma et al, 2013 ).…”

Section: Discussionmentioning

confidence: 99%

How great white sharks nourish their embryos to a large size: evidence of lipid histotrophy in lamnoid shark reproduction

et al. 2016

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The great white shark (Carcharodon carcharias) exhibits viviparous and oophagous reproduction. A 4950 mm total length (TL) gravid female accidentally caught by fishermen in the Okinawa Prefecture, Southern Japan carried six embryos (543-624 mm TL, three in each uterus). Both uteri contained copious amounts of yellowish viscous uterine fluid (over 79.2 litres in the left uterus), nutrient eggs and broken egg cases. The embryos had yolk stomachs that had ruptured, the mean volume of which was approximately 197.9 ml. Embryos had about 20 rows of potentially functional teeth in the upper and lower jaws. Periodic acid Schiff (PAS)-positive substances were observed on the surface and in the cytoplasm of the epithelial cells, and large, secretory, OsO4-oxidized lipid droplets of various sizes were distributed on the surface of the villous string epithelium on the uterine wall. Histological examination of the uterine wall showed it to consist of villi, similar to the trophonemata of Dasyatidae rays, suggesting that the large amount of fluid found in the uterus of the white shark was likely required for embryo nutrition. We conclude that: (1) the lipid-rich fluid is secreted from the uterine epithelium only in early gestation before the onset of oophagy, (2) the embryos probably use the abundant uterine fluid and encased nutrient eggs for nutrition at this stage of their development, and (3) the uterine fluid is the major source of embryonic nutrition before oophagy onset. This is the first record of the lipid histotrophy of reproduction among all shark species.

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“…Nos últimos anos, a detecção de diversas proteínas relacionadas à placentação de mamíferos foi reportada nas células epiteliais colunares (CARTER et al, 2007); no epitélio coriônico (ACKERMAN et al, 2012) e em células endoteliais do saco vitelino de placentas de tubarões martelo Sphyrna lewini e S. zygaena (LINNAEUS, 1758) (SOMA et al, 2013. Entre estas proteínas se destaca a proteína específica da gestação PSG1 (Pregnancy-Specific Glycoprotein, PSG1).…”

Section: Tolerância Materno-fetal Em Tubarõesunclassified

Estrutura da placenta epiteliocorial em tubarões e sua interação materno-fetal

Conrado¹,

Bruno²,

Salmon³

et al. 2020

Rev. Educ. Cont. Med. Vet. Zootec.

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Em mamíferos, a nutrição intrauterina de embriões ocorre através da placenta. Porém, em tubarões vivíparos placentários da ordem Carcharhiniformes (famílias Leptochariidae, Triakidae, Hemigaleidae e Carcharhinidae), a nutrição de embriões pode ocorrer de três formas: lecitotrofia (vitelo); histotrofia (secreções uterinas) e placentotrofia. Nesta revisão, é discutida a similitude anatômica, fisiológica e, principalmente imunológica, entre as placentas de tubarões e de mamíferos, mostrando que a tolerância materno-fetal em tubarões placentários e mamíferos é dependente de proteínas como a indoleamina 2,3 – dioxigenase, interleucina-1 e proteínas específicas da gestação.

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Review: Exploration of placentation from human beings to ocean-living species

Cited by 16 publications

References 11 publications

Tracing the cis-regulatory changes underlying the endometrial control of placental invasion

Tracing the cis-regulatory changes underlying the endometrial control of placental invasion

How great white sharks nourish their embryos to a large size: evidence of lipid histotrophy in lamnoid shark reproduction

Estrutura da placenta epiteliocorial em tubarões e sua interação materno-fetal

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