Development of the inverted visceral yolk sac in three species of caviids (rodentia, caviomorpha, caviidae)

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dc.contributor.authorMiglino, M.
dc.contributor.authorFranciolli, A. L. R.
dc.contributor.authorOliveira, M. F.
dc.contributor.authorAmbrosio, C.
dc.contributor.authorBonatelli, M.
dc.contributor.authorMachado, M. R. F.
dc.contributor.authorMess, A.
dc.contributor.institutionHumboldt Univ
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Federal Rural do Semi-Árido (UFERSA)
dc.contributor.institutionEndocare Brasil Quim Ltd
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:31:57Z
dc.date.available2014-05-20T15:31:57Z
dc.date.issued2008-08-01
dc.description.abstractGuinea pig related rodents possess numerous derived placental characters. We attempt to identify diversity within the visceral yolk sac and its association with the chorioallantoic placenta in three species of caviids, two of them possessing a capsule formed by the decidua that covers the chorioallantoic placenta. The results verify that in early pregnancy all three species have in inverted yolk sac placenta. In advanced pregnancy the species differ: Galea spixii, as representative without a capsule, bear a yolk sac in apposition to the chorioallantoic placenta with signs of exchange activity until term. Galea is similar to other caviomorphs in this respect. In Dasyprocta leporina and Cuniculus paca, the representatives possessing a capsule, the yolk sac endoderm lacks signs of substance exchange. Evidently, the presence of a capsule prevents such ail interaction. The variations established here must be considered if animal models for human placentation are required which have restricted access to the chorioallantoic placenta from the outside. (C) 2008 Elsevier Ltd. All rights reserved.en
dc.description.affiliationHumboldt Univ, Museum Nat Hist Berlin, Dept Res, D-10115 Berlin, Germany
dc.description.affiliationUniv São Paulo, Fac Vet Med, Dept Surg, São Paulo, Brazil
dc.description.affiliationUniversidade Federal Rural do Semi-Árido (UFERSA), Dept Anim Sci, Mossoro, RN, Brazil
dc.description.affiliationEndocare Brasil Quim Ltd, São Paulo, Brazil
dc.description.affiliationUniv Estadual Paulista, São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, São Paulo, Brazil
dc.format.extent748-752
dc.identifierhttp://dx.doi.org/10.1016/j.placenta.2008.05.007
dc.identifier.citationPlacenta. London: W B Saunders Co Ltd, v. 29, n. 8, p. 748-752, 2008.
dc.identifier.doi10.1016/j.placenta.2008.05.007
dc.identifier.issn0143-4004
dc.identifier.urihttp://hdl.handle.net/11449/40968
dc.identifier.wosWOS:000259031100012
dc.language.isoeng
dc.publisherW B Saunders Co Ltd
dc.relation.ispartofPlacenta
dc.relation.ispartofjcr2.434
dc.relation.ispartofsjr1,223
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectanimal modelen
dc.subjectguinea pigen
dc.subjectcapsuleen
dc.subjectfetomaternal exchangeen
dc.subjectevolutionen
dc.titleDevelopment of the inverted visceral yolk sac in three species of caviids (rodentia, caviomorpha, caviidae)en
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderW B Saunders Co Ltd

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