The effects of vitamin E supplementation on sperm parameters, chromatin integrity, and gene expression before and after freezing in aged mice.

IF 1.8 Q3 OBSTETRICS & GYNECOLOGY
Sadegh Zarei, Farnoosh Molavi, Farzaneh Abbas Abasnezhad, Behanaz Majidi, Saeed Mohammadihosseinabad, Faezeh Esmaeili Ranjbar, Mahboubeh Vatanparast
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引用次数: 0

Abstract

Objective: Some age-related testicular changes, such as Sertoli cell vacuolization and blood-testis barrier breakdown, reduce total sperm production and male fertility. Therefore, this study investigated the effect of vitamin E on restoring testicular function in aged mice. Sperm cryo-resistance was also assessed.

Methods: Twenty-eight 48-week-old male Naval Medical Research Institute mice were divided into four groups for a daily gavage of vitamin E: the control group received distilled water, while the three treatment groups were administered 100, 200, and 400 mg/kg, respectively, for 4 weeks. Subsequently, semen analyses, DNA fragmentation index (DFI), and protamine deficiency tests were conducted. Testicular histology, tissue antioxidant enzyme activity, and gene expression levels were also assessed.

Results: The two higher dosages of vitamin E were associated with a higher sperm count, greater progressive motility, and improved sperm morphology (p<0.05). These benefits were also evident after sperm freezing (p<0.05). Although chromatin abnormalities increased following vitrification, the treatment groups showed better outcomes (p<0.05). The tubular diameter, epithelium height, and luminal diameters remained unchanged with age. The tissue antioxidant capacity was greater in the groups receiving the high doses of vitamin E. Additionally, significant increases in inhibitor of DNA binding protein-4 (Id4) and GDNF family receptor alpha-1 (Gfra1) expression were observed in the higher vitamin E dosage groups, and promyelocytic leukemia zinc finger protein (Plzf) expression was notably present in the 400 mg/kg treatment group compared to the control group (p<0.05).

Conclusion: Antioxidant supplementation might enhance reproductive outcomes in aging males. The observed effects included improved sperm cryo-resistance, which is advantageous for future applications such as sperm freezing or fertility preservation.

补充维生素 E 对老年小鼠冷冻前后精子参数、染色质完整性和基因表达的影响。
目的:一些与年龄有关的睾丸变化,如 Sertoli 细胞空泡化和血睾屏障破坏,会降低精子总产量和男性生育能力。因此,本研究探讨了维生素 E 对恢复老年小鼠睾丸功能的影响,并评估了精子的冷冻抗性。同时还评估了精子的抗冷冻能力:将 28 只 48 周大的雄性海军医学研究所小鼠分为四组,每天灌胃维生素 E:对照组服用蒸馏水,三个治疗组分别服用 100、200 和 400 毫克/千克,连续服用 4 周。随后进行精液分析、DNA碎片指数(DFI)和原胺缺乏试验。此外,还对睾丸组织学、组织抗氧化酶活性和基因表达水平进行了评估:结果:两种较高剂量的维生素 E 与较高的精子数量、较强的渐进运动性和精子形态的改善有关(p结论:补充抗氧化剂可能会提高老年男性的生殖能力。观察到的效果包括提高了精子的抗冷冻能力,这对未来精子冷冻或生育力保存等应用非常有利。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
3.30
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