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Updated: May 21, 2026
10:24
Evaluation of Intracellular Location of Reactive Oxygen Species in Solea Senegalensis Spermatozoa
Published on: March 11, 2018
Effects of reactive oxygen species on sperm function.
1Biotechnology and Germplasm Laboratory, Agricultural Research Service, US Department of Agriculture, Beltsville, Maryland, USA. dave.guthrie@ars.usda.gov
Theriogenology
|June 19, 2012
Summary
New flow cytometry assays accurately detect reactive oxygen species (ROS) and lipid peroxidation in boar sperm. These methods reveal low basal levels in viable sperm, with ROS impacting motility via a mitochondrial-independent pathway.
Area of Science:
- Reproductive Biology
- Biochemistry
- Cell Biology
Background:
- Reactive oxygen species (ROS) and membrane lipid peroxidation negatively impact sperm function and fertility.
- Existing chemiluminescence assays lack specificity and sensitivity for detecting ROS and lipid peroxidation in sperm.
- Understanding these oxidative stress markers is crucial for improving sperm preservation and reproductive outcomes.
Purpose of the Study:
- To develop sensitive flow cytometry assays for measuring superoxide (SO), hydrogen peroxide (HP), membrane lipid peroxidation, and mitochondrial potential in boar sperm.
- To investigate the basal levels of ROS and lipid peroxidation in fresh and frozen-thawed boar semen.
- To elucidate the mechanism by which ROS affects sperm motility and ATP content.
Main Methods:
- Development and application of flow cytometry assays to quantify SO, HP, membrane lipid peroxidation, and inner mitochondrial transmembrane potential in boar sperm.
- Treatment of boar sperm with menadione (a mitochondrial SO generator) and HP to study ROS effects.
- Assessment of sperm motility and ATP content following ROS induction.
Main Results:
- The developed flow cytometry assays are sensitive enough to detect early changes in ROS formation in viable sperm.
- Basal ROS formation and lipid peroxidation are low (<4%) in viable fresh and frozen-thawed boar sperm.
- Menadione or HP treatment caused immediate motility disruption with delayed or no ATP decrease, suggesting a mitochondrial-independent mechanism.
Conclusions:
- Flow cytometry offers a sensitive and specific method for assessing oxidative stress in sperm.
- ROS primarily affects boar sperm motility through a mitochondrial-independent pathway, potentially by impairing ATP utilization or the flagellar contractile apparatus.
- These findings provide new insights into sperm physiology and oxidative stress, with implications for fertility and assisted reproduction technologies.
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