Effect of oviductal fluid on bull sperm functionality and fertility under non-capacitating and capacitating incubation conditions.

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ID: 197043
2020
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Abstract
This study investigated the effect of bovine oviductal fluid from late follicular (LF) and early luteal (EL) phases on bull sperm functionality under non-capacitating (NCAP) and capacitating (CAP) conditions. Frozen-thawed semen samples from five bulls were thawed and incubated (0, 1 or 2 h) in NCAP and CAP media supplemented with 1% bovine oviductal fluid (LF and EL groups) and in absence of fluid (C group). Motion parameters were assessed by CASA; sperm viability, acrosomal integrity and membrane lipid disorder parameters were evaluated by flow cytometry; and sperm DNA fragmentation was evaluated by the Comet assay. Finally, in vitro fertilization with sperm treated under CAP conditions was performed and further embryo culture results evaluated. In NCAP medium, addition of LF and EL fluid increased the total and progressive motility, and LF fluid improved the stability of sperm DNA. However, under CAP conditions addition of LF and EL fluid decreased some sperm motion parameters and some parameters of sperm DNA stability. Proportion of viable sperm cells with low lipid disorder was higher in NCAP than CAP medium and addition of LF fluid markedly increased the proportion of viable spermatozoa with high lipid disorder and acrosome alteration (spontaneous acrosome reaction). Under current conditions, incubation of bull sperm with oviductal fluid before insemination did not affect detrimentally the IVF results nor embryo development, being blastocyst rate similar between CAP-LF, CAP-EL and control groups. In conclusion, oviductal fluid positively influences sperm functionality and modulate in vitro capacitation.
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kucuk2020effecttheriogenology Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Küçük, Niyazi;Lopes, Jordana S;Soriano-Úbeda, Cristina;Hidalgo, Carlos Olegario;Romar, Raquel;Gadea, Joaquín;
Journal Theriogenology
Year 2020
DOI
S0093-691X(20)30528-8
URL
Keywords
sperm embryo casa oviductal fluid sperm functionality capacitation

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