Morphometric analysis of the placenta in the New World mouse Necromys lasiurus(Rodentia, Cricetidae): a comparison of placental development in cricetids and murids

Reproductive Biology and Endocrinology

Research

Moacir F de Oliveira¹  Phelipe O Favaron²  Maria A Miglino²  Andrea M Mess²  Anne Gabory³  Pascale Chavatte-Palmer⁴  Anne Tarrade⁴ 

[1] Department of Animal Science, Universidade Federal Rural do Semi-Árido, Mossoró, Rio Grande do Norte, 59625-900, Brazil;Department of Surgery, School of Veterinary Medicine, University of Sao Paulo, Av. Prof. Dr. Orlando Marques de Paiva, 87, Cidade Universitária, CEP 05508-270, São Paulo, SP, Brazil;INRA, UMR 1198 Biologie du Développement et Reproduction, Jouy-en-Josas, F-78352, France;ENVA, Maisons-Alfort, F-94704, France;INRA, UMR 1198 Biologie du Développement et Reproduction, Jouy-en-Josas, F-78352, France;ENVA, Maisons-Alfort, F-94704, France;Foundation PremUp, Paris, France;

关键词: Placenta;    Stereology;    Sigmodontinae;    Decidua;    Junctional zone;    Labyrinth;    Haemochorial placenta;    Fetal vessels;    Trophoblast;    Evolution;   

DOI  :  10.1186/1477-7827-11-10

 received in 2012-11-19, accepted in 2013-02-18,  发布年份 2013

来源: Springer

【 摘 要 】

BackgroundStereology is an established method to extrapolate three-dimensional quantities from two-dimensional images. It was applied to placentation in the mouse, but not yet for other rodents. Herein, we provide the first study on quantitative placental development in a sigmodontine rodent species with relatively similar gestational time. Placental structure was also compared to the mouse, in order to evaluate similarities and differences in developmental patterns at the end of gestation.MethodsFetal and placental tissues of Necromys lasiurus were collected and weighed at 3 different stages of gestation (early, mid and late gestation) for placental stereology. The total and relative volumes of placenta and of its main layers were investigated. Volume fractions of labyrinth components were quantified by the One Stop method in 31 placentae collected from different individuals, using the Mercator® software. Data generated at the end of gestation from N. lasiurus placentae were compared to those of Mus musculus domesticus obtained at the same stage.ResultsA significant increase in the total absolute volumes of the placenta and its main layers occurred from early to mid-gestation, followed by a reduction near term, with the labyrinth layer becoming the most prominent area. Moreover, at the end of gestation, the total volume of the mouse placenta was significantly increased compared to that of N. lasiurus although the proportions of the labyrinth layer and junctional zones were similar. Analysis of the volume fractions of the components in the labyrinth indicated a significant increase in fetal vessels and sinusoidal giant cells, a decrease in labyrinthine trophoblast whereas the proportion of maternal blood space remained stable in the course of gestation. On the other hand, in the mouse, volume fractions of fetal vessels and sinusoidal giant cells decreased whereas the volume fraction of labyrinthine trophoblast increased compared to N. lasiurus placenta.ConclusionsPlacental development differed between N. lasiurus and M. musculus domesticus. In particular, the low placental efficiency in N. lasiurus seemed to induce morphological optimization of fetomaternal exchanges. In conclusion, despite similar structural aspects of placentation in these species, the quantitative dynamics showed important differences.

【 授权许可】

CC BY   
© Favaron et al; licensee BioMed Central Ltd. 2013