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Melatonin alleviates heat stress-induced oxidative stress and apoptosis in human spermatozoa

Oxidative stress generates a large amount of reactive oxygen species (ROS) and affects sperm quality via damaging sperm DNA and compromising the intracellular homeostasis in human spermatozoa. In assisted reproductive technology (ART), it is substantial to prevent spermatozoa from ROS attack. The pi...

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Published in:Free radical biology & medicine 2021-02, Vol.164, p.410-416
Main Authors: Zhao, Feifei, Whiting, Sara, Lambourne, Sarah, Aitken, R. John, Sun, Ying-pu
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creator Zhao, Feifei
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description Oxidative stress generates a large amount of reactive oxygen species (ROS) and affects sperm quality via damaging sperm DNA and compromising the intracellular homeostasis in human spermatozoa. In assisted reproductive technology (ART), it is substantial to prevent spermatozoa from ROS attack. The pineal hormone melatonin has the natural antioxidant capacity and can scavenge ROS. To the best of our knowledge, however, there are presently no studies investigating if melatonin can protect human spermatozoa from heat-induced oxidative damage. Herein, we induced oxidative stress in human spermatozoa with heat treatment, and determined that melatonin could protect human spermatozoa from heat-induced oxidative stress. We first confirmed that heat stress-induced oxidative stress damaged human spermatozoa by decreasing sperm motility and viability. Furthermore, the pretreatment of human spermatozoa by melatonin was able to alleviate such damage by suppressing sperm mitochondrial ROS generation, increasing mitochondrial membrane potential, reducing the formation of the lipid peroxidation product, 4-HNE, and reducing sperm DNA damage and apoptosis. Collectively, these findings suggest that melatonin is useful as a potential treatment option for male infertility caused by heat-induced oxidative stress. [Display omitted] •Melatonin protects sperm on condition of heat-induced oxidative stress.•Melatonin could suppress mitochondrial ROS generation and reduce DNA damage of the sperm.•Melatonin has potential clinic value for varicocele.
doi_str_mv 10.1016/j.freeradbiomed.2021.01.014
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subjects Apoptosis
DNA damage
Heat stress
Melatonin
Oxidative stress
title Melatonin alleviates heat stress-induced oxidative stress and apoptosis in human spermatozoa
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