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Effect of red light on optically trapped spermatozoa.
Kay W Chow1, Daryl Preece1,2, Michael W Berns1
1Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA.
Biomedical Optics Express
|October 3, 2017
Summary
Red light irradiation boosts sperm swimming force by increasing sperm swimming speed. This finding supports using light stimulation to enhance sperm quality for artificial insemination success.
Area of Science:
- Reproductive biology
- Spermatozoa motility analysis
- Photobiology
Background:
- Successful artificial insemination requires high-quality spermatozoa.
- Sperm swimming force is a key indicator of sperm quality, linked to reproductive success.
- Previous research indicates red light increases sperm swimming speed.
Purpose of the Study:
- To investigate if 633nm red light irradiation enhances sperm swimming force.
- To test the hypothesis that increased sperm swimming speed leads to greater swimming force.
- To establish a methodology for comparing relative swimming forces.
Main Methods:
- Utilizing a novel methodology to trap spermatozoa.
- Irradiating trapped sperm samples with 633nm red light.
- Measuring mean squared displacement to compare motility between irradiated and non-irradiated sperm.
Main Results:
- 633nm red light irradiation significantly increased the mean squared displacement of trapped sperm.
- The methodology enabled a direct comparison of relative swimming forces.
- Irradiated sperm exhibited enhanced motility characteristics.
Conclusions:
- Red light irradiation can increase sperm swimming speed and, consequently, swimming force.
- This study provides a foundation for using photobiomodulation to improve sperm quality.
- Enhanced sperm force may lead to improved outcomes in artificial insemination procedures.
