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- W1968945043 endingPage "540" @default.
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- W1968945043 abstract "Following insemination, spermatozoa are retained in the utero-tubal junction and isthmic region of the oviduct, where essential steps of capacitation are coordinated. Although a majority of the spermatozoa is exposed to similar conditions in the oviduct, the speed of the response varies depending on the individual male and the state of the spermatozoa. The present study evaluated individual boar variations in terms of the ability of spermatozoa to undergo tyrosine phosphorylation in response to isthmic oviductal fluid (ODF). Cryopreserved spermatozoa from four boars were incubated with pre- and post-ovulatory ODF for 6 hr. Sperm kinematics, global protein tyrosine phosphorylation, and dynamics of different phosphorylation patterns were analyzed at hourly interval. The percentage of phosphorylated spermatozoa in the pre-ovulatory ODF-treated group was significantly (P < 0.001) higher than in the other treatment groups. Motility, velocity, and protein tyrosine phosphorylation in spermatozoa in response to ODF and control media also showed differences between boars. Spermatozoa from all four boars showed strong expression of a 19-kDa phosphoprotein while spermatozoa from two boars showed additionally strong expression of a 32-kDa phosphoprotein when incubated with pre-ovulatory ODF. While phosphorylation of proteins in the acrosome and the equatorial segment of the sperm were noticed at an early stage during incubation with ODF, tail phosphorylation appeared at a later stage of capacitation. The results indicate individual variation between boars in terms of sperm proteins, including different phosphorylation patterns, in response to ODF, which might be related to fertility.Mol. Reprod. Dev. 79: 525-540, 2012. © 2012 Wiley Periodicals, Inc." @default.
- W1968945043 created "2016-06-24" @default.
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- W1968945043 date "2012-07-12" @default.
- W1968945043 modified "2023-10-18" @default.
- W1968945043 title "Oviductal fluid modulates the dynamics of tyrosine phosphorylation in cryopreserved boar spermatozoa during capacitation" @default.
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- W1968945043 doi "https://doi.org/10.1002/mrd.22058" @default.
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