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Reproduction, Fertility and Development Reproduction, Fertility and Development Society
Vertebrate reproductive science and technology
RESEARCH ARTICLE

Expression of macrophage migration inhibitory factor (MIF) in bovine oviducts is higher in the postovulatory phase than during the oestrus and luteal phase

Asrafun Nahar A and Hiroya Kadokawa A B
+ Author Affiliations
- Author Affiliations

A Faculty of Veterinary Medicine, Yamaguchi University, Yoshida 1677-1, Yamaguchi-shi, Yamaguchi-ken, 753-8515, Japan.

B Corresponding author. Email: hiroya@yamaguchi-u.ac.jp

Reproduction, Fertility and Development 29(8) 1521-1529 https://doi.org/10.1071/RD15546
Submitted: 24 December 2015  Accepted: 21 June 2016   Published: 28 July 2016

Abstract

Whether macrophage migration inhibitory factor (MIF) in the bovine oviduct is important for early embryogenesis has not been well substantiated. The aim of the present study was to test the hypothesis that bovine oviduct expresses higher levels of MIF during the post-ovulation phase. Both ampullary and isthmic samples were collected from Japanese black heifers during oestrus (Day 0; n = 5), postovulation (Day 3; n = 6) and luteal phase (Days 9–12; n = 5). MIF mRNA and protein were extracted from the ampullary and isthmic samples and their levels measured by real-time polymerase chain reaction and western blot analysis respectively. Fluorescent immunohistochemistry was performed on frozen ampullary and isthmic sections using antibodies against MIF. MIF mRNA and protein expression was higher in the postovulatory phase than during oestrus and the luteal phase (P < 0.05). Fluorescent immunohistochemistry confirmed that in all phases of the oestrous cycle evaluated, the primary site of MIF expression in the ampulla and isthmus was the tunica mucosa. In conclusion, the bovine ampulla and isthmus have higher MIF expression during the postovulatory phase. Further studies are needed to clarify the role of MIF in bovine oviducts.

Additional keywords: cytokine, growth factor, ruminant, tunica mucosa.


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