An unusual feature of yolk sac placentation in Necromys lasiurus (Rodentia, Cricetidae, Sigmodontinae)
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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| Data(s) |
05/11/2013
05/11/2013
2012
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| Resumo |
We studied the development of the inverted yolk sac in a New World rodent, Necromys lasiurus during early placentation. Ten implantation sites were investigated by means of histology, immunohistochemistry and electron microscopy. The yolk sac was villous near its attachment to the placenta. Elsewhere it was non-villous and closely attached to the uterus. The uterine glands were shallow and wide mouthed. They were associated with vessels and filled with secretion, suggesting the release of histotroph. This feature was absent at later stages. The intimate association of the yolk sac with specialized glandular regions of the uterus may represent a derived character condition of Necromys and/or sigmodont rodents. (C) 2012 Elsevier Ltd. All rights reserved. University of Sao Paulo University of Sao Paulo Universidade Federal Rural do Semi-Arido, Mossoro Universidade Federal Rural do SemiArido, Mossoro FAPESP FAPESP [09/53392-8] |
| Identificador |
PLACENTA, LONDON, v. 33, n. 7, supl. 4, Part 1, pp. 578-580, JUL, 2012 0143-4004 http://www.producao.usp.br/handle/BDPI/41655 10.1016/j.placenta.2012.02.011 |
| Idioma(s) |
eng |
| Publicador |
W B SAUNDERS CO LTD LONDON |
| Relação |
PLACENTA |
| Direitos |
closedAccess Copyright W B SAUNDERS CO LTD |
| Palavras-Chave | #CHORIOVITELLINE PLACENTA #HISTOTROPH #EVOLUTION #CELLS #RAT #DEVELOPMENTAL BIOLOGY #OBSTETRICS & GYNECOLOGY #REPRODUCTIVE BIOLOGY |
| Tipo |
article original article publishedVersion |
