Red light improves spermatozoa motility and does not induce oxidative DNA damage

Area of Science:

• Reproductive biology
• Biomedical engineering
• Photomedicine

Background:

• Sperm motility is crucial for fertilization and semen viability.
• Red light exposure is being investigated for cellular repair and enhanced sperm motility.
• Assessing DNA safety is critical for red light therapy applications in sperm.

Purpose of the Study:

• To evaluate the effect of 633 nm red laser light on sperm motility.
• To assess the safety of red light exposure by analyzing DNA damage.
• To introduce a novel wavelet-based algorithm for measuring sperm motility under red light.

Main Methods:

• A novel wavelet-based algorithm was developed to measure sperm curvilinear velocity under red light.
• Sperm motility was compared to results from standard computer-assisted sperm analysis (CASA).
• DNA integrity was assessed by analyzing double-strand breaks and oxidative damage.

Main Results:

• The wavelet-based algorithm provided results comparable to CASA.
• Red light exposure at 633 nm did not significantly increase oxidative DNA damage in sperm.
• Insignificant differences in DNA damage were observed for the tested parameters.

Conclusions:

• 633 nm red laser light shows potential for improving sperm motility.
• The tested red light parameters appear safe for sperm, showing no significant DNA damage.
• The novel algorithm offers a reliable method for assessing sperm motility under red light illumination.