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Subplacental development in Galea spixii

Authors :
Ferdinando V.F. Bezerra
Phelipe O. Favaron
Andrea M. Mess
Hélio N. Araújo Júnior
Gleidson B. Oliveira
Alexsandra F. Pereira
Maria A. Miglino
Moacir F. Oliveira
Source :
Pesquisa Veterinária Brasileira, Vol 38, Iss 11, Pp 2175-2182
Publisher :
Colégio Brasileiro de Patologia Animal (CBPA).

Abstract

ABSTRACT: Animal models are essential to understand healthy human placentation. Guinea pig related rodents became on focus for such purposes. In particular, processes of trophoblast invasion are similar. The latter is associated with a specialized area, the subplacenta. Since previous results showed differences between the guinea pig and its close relative Galea spixii, we aimed to study subplacental development with more detail. We investigated 16 pregnant females of 14 to 55 days of gestation by means of histology, morphometrics, immunohistochemistry and electron microscopy. The overlap between the fetomaternal blood systems resulted as intimate, suggesting some exchange processes. Proliferation was revealed by three independent methods, being most active in early and mid-gestation, which was in accordance to former results. Though degeneration of tissues took place, the subplacenta was maintained towards term with access to the fetal vascularization, supporting a hypothesis about the release of substances to the fetal unit in advanced gestation. In contrast to other species, the extraplacental trophoblast showed a shift from syncytial streamers to giant cells during mid-gestation. Views on placentation in caviomorphs were influenced by the guinea pig, but our data supported recent studies that the subplacenta had a much greater placidity. In regard to subplacental grow, degeneration and likely also exchange processes, Galea and other species showed a more basal pattern of caviomorphs than the guinea pig. Such differences should be considered, when choosing most adequate animal models for special purposes in comparison to human placentation.

Details

Language :
English, Portuguese
ISSN :
16785150
Volume :
38
Issue :
11
Database :
Directory of Open Access Journals
Journal :
Pesquisa Veterinária Brasileira
Publication Type :
Academic Journal
Accession number :
edsdoj.7f9641180cfe44ae970283075e4052af
Document Type :
article
Full Text :
https://doi.org/10.1590/1678-5150-pvb-5527