The Protective Effects of Alpha Lipoic Acid on Human Sperm Function During Freezing-Thawing

Area of Science:

• Reproductive Biology
• Biochemistry

Background:

• Sperm cryopreservation is crucial for assisted reproduction technologies (ART).
• The freeze-thawing process induces oxidative stress, compromising sperm motility, viability, and DNA integrity.
• Cold stress during cryopreservation negatively impacts sperm quality.

Purpose of the Study:

• To evaluate the efficacy of alpha lipoic acid (ALA) in preserving human sperm function during cryopreservation.
• To determine the optimal concentration of ALA for protecting sperm from freeze-thaw damage.

Main Methods:

• Human semen samples were analyzed.
• Sperm freeze medium was supplemented with varying concentrations of ALA (0-8 mM).
• Effects on sperm motility, DNA damage, and lipid peroxidation were assessed post-thaw.

Main Results:

• Supplementation with 0.2 mM ALA significantly enhanced sperm motility.
• The 0.2 mM ALA concentration led to reduced DNA damage in frozen-thawed sperm.
• Lipid peroxidation levels were decreased in sperm treated with 0.2 mM ALA.

Conclusions:

• Alpha lipoic acid (ALA) enhances the cryoprotective properties of sperm freeze medium.
• ALA protects human sperm from reactive oxygen species (ROS) damage induced by freeze-thawing.
• Supplementing sperm freeze medium with 0.2 mM ALA is beneficial for male gamete cryopreservation in ART.