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PGF2α levels in Day 8 blood plasma are increased by the presence of one or more embryos in the uterus

Published online by Cambridge University Press:  10 April 2015

E. Gomez ,
D. Martin ,
S. Carrocera  and
M. Muñoz
E. Gomez*
Affiliation:
Centro de Biotecnología Animal – SERIDA, Camino de Rioseco 1225, La Olla – Deva, 33394 Gijón, Asturias, Spain
D. Martin
Affiliation:
Centro de Biotecnología Animal – SERIDA, Camino de Rioseco 1225, La Olla – Deva, 33394 Gijón, Asturias, Spain
S. Carrocera
Affiliation:
Centro de Biotecnología Animal – SERIDA, Camino de Rioseco 1225, La Olla – Deva, 33394 Gijón, Asturias, Spain
M. Muñoz
Affiliation:
Centro de Biotecnología Animal – SERIDA, Camino de Rioseco 1225, La Olla – Deva, 33394 Gijón, Asturias, Spain
*
†E-mail: egomez @serida.org
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Abstract

In cattle, the detection of very early endometrial responses is considered to be hampered by the presence of only a single embryo. Therefore, we have previously developed a model of multiple embryo transfer to circumvent this hindrance. In this work, we analysed embryo–maternal interactions in the bovine uterus on day 8 of development while comparing the presence of multiple v. single embryos using embryo transfer and artificial insemination, respectively. Concentration of proteins (β-actin, NFkB, clusterin and immunoproteosome 20S β5i subunit–i20S), by western blot, and hexoses (glucose and fructose) were measured in paired samples of uterine fluid (UF) from the same animal with and without embryos in the uterus and were compared with UF obtained after artificial insemination. Prostaglandin (PG) F2α and PGE2 concentrations were also analysed in blood plasma. The four proteins analysed and hexoses were unaffected by the presence of one or more embryos in the uterus. However, blood PGF2α showed similar, significant increases with one or more embryos over cyclic animals; such changes were not observed in blood PGE2. Although multiple embryo transfer may appear to be non-physiological, we showed that the uterus, at the very early embryonic stages, does exhibit physiological reactions. Multiple embryo transfer can, therefore, be used for studies of very early embryo–maternal interactions in vivo in monotocous species.

Keywords

bovineembryouterusproteinhexose
Type
Research Article
Information
animal , Volume 9 , Issue 8 , August 2015 , pp. 1355 - 1360
Copyright
© The Animal Consortium 2015 

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