An unusual feature of yolk sac placentation in Necromys lasiurus (Rodentia, Cricetidae, Sigmodontinae)

Autor(es)

Favaron, P. O. ^[1] ; Carter, A. M. ^[2] ; Mess, A. M. ^[1] ; de Oliveira, M. F. ^[3] ; Miglino, M. A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Vet Med & Anim Sci, Dept Surg, BR-05508270 Sao Paulo - Brazil

^[2] Univ So Denmark, Inst Mol Med, Odense - Denmark

^[3] Univ Fed Rural Semi Arido, Dept Anim Sci, Mossoro, RN - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Placenta; v. 33, n. 7, p. 578-580, JUL 2012.
• Citações Web of Science: 4

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. (AU)

• Processo FAPESP: 09/53392-8 - Placentação em Necromys lasiurus (Rodentia, Cricetidae, Sigmodontinae): características da eritrofagocitose, transporte placentário, inversão e versatilidade vitelina
• Beneficiário: Phelipe Oliveira Favaron
• Modalidade de apoio: Bolsas no Brasil - Doutorado