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Effect of oviductal fluid on bull sperm functionality and fertility under non-capacitating and capacitating incubation conditions
Theriogenology ( IF 2.8 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.theriogenology.2020.09.035
Niyazi Küçük 1 , Jordana S Lopes 2 , Cristina Soriano-Úbeda 2 , Carlos Olegario Hidalgo 3 , Raquel Romar 2 , Joaquín Gadea 2
Affiliation  

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.

中文翻译:

在非获能和获能孵化条件下输卵管液对公牛精子功能和生育力的影响

本研究调查了来自卵泡晚期 (LF) 和黄体早期 (EL) 期的牛输卵管液在非获能 (NCAP) 和获能 (CAP) 条件下对公牛精子功能的影响。来自五头公牛的冻融精液样品在补充有 1% 牛输卵管液(LF 和 EL 组)和不存在液体(C 组)的 NCAP 和 CAP 培养基中解冻和孵育(0、1 或 2 小时)。运动参数由 CASA 评估;通过流式细胞术评估精子活力、顶体完整性和膜脂紊乱参数;通过彗星试验评估精子 DNA 断裂。最后,用在 CAP 条件下处理的精子进行体外受精,并评估进一步的胚胎培养结果。在 NCAP 培养基中,加入 LF 和 EL 液增加了总的和渐进的运动性,LF液提高了精子DNA的稳定性。然而,在CAP条件下,LF和EL液的加入降低了一些精子运动参数和精子DNA稳定性的一些参数。NCAP中具有低脂质紊乱的活精子细胞的比例高于CAP培养基,并且LF液体的加入显着增加了具有高脂质紊乱和顶体改变(自发性顶体反应)的活精子的比例。在目前的条件下,在受精前用输卵管液孵育公牛精子不会对 IVF 结果和胚胎发育产生不利影响,CAP-LF、CAP-EL 和对照组之间的囊胚率相似。总之,输卵管液积极影响精子功能并调节体外获能。在CAP条件下,LF和EL液的加入降低了一些精子运动参数和精子DNA稳定性的一些参数。NCAP中具有低脂质紊乱的活精子细胞的比例高于CAP培养基,并且LF液体的加入显着增加了具有高脂质紊乱和顶体改变(自发性顶体反应)的活精子的比例。在目前的条件下,在受精前用输卵管液孵育公牛精子不会对 IVF 结果和胚胎发育产生不利影响,CAP-LF、CAP-EL 和对照组之间的囊胚率相似。总之,输卵管液积极影响精子功能并调节体外获能。在CAP条件下,LF和EL液的加入降低了一些精子运动参数和精子DNA稳定性的一些参数。NCAP中具有低脂质紊乱的活精子细胞的比例高于CAP培养基,并且LF液体的加入显着增加了具有高脂质紊乱和顶体改变(自发性顶体反应)的活精子的比例。在目前的条件下,在受精前用输卵管液孵育公牛精子不会对 IVF 结果和胚胎发育产生不利影响,CAP-LF、CAP-EL 和对照组之间的囊胚率相似。总之,输卵管液积极影响精子功能并调节体外获能。NCAP中具有低脂质紊乱的活精子细胞的比例高于CAP培养基,并且LF液体的加入显着增加了具有高脂质紊乱和顶体改变(自发性顶体反应)的活精子的比例。在目前的条件下,在受精前用输卵管液孵育公牛精子不会对 IVF 结果和胚胎发育产生不利影响,CAP-LF、CAP-EL 和对照组之间的囊胚率相似。总之,输卵管液积极影响精子功能并调节体外获能。NCAP中具有低脂质紊乱的活精子细胞的比例高于CAP培养基,并且LF液体的加入显着增加了具有高脂质紊乱和顶体改变(自发性顶体反应)的活精子的比例。在目前的条件下,在受精前用输卵管液孵育公牛精子不会对 IVF 结果和胚胎发育产生不利影响,CAP-LF、CAP-EL 和对照组之间的囊胚率相似。总之,输卵管液积极影响精子功能并调节体外获能。在受精前用输卵管液孵育公牛精子不会对 IVF 结果和胚胎发育产生不利影响,CAP-LF、CAP-EL 和对照组的囊胚率相似。总之,输卵管液积极影响精子功能并调节体外获能。在受精前用输卵管液孵育公牛精子不会对 IVF 结果和胚胎发育产生不利影响,CAP-LF、CAP-EL 和对照组的囊胚率相似。总之,输卵管液积极影响精子功能并调节体外获能。
更新日期:2020-12-01
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