Engineered extracellular vesicles: a breakthrough approach to overcoming sperm cryopreservation challenges

Area of Science:

• Reproductive Biology
• Cell Biology
• Biotechnology

Background:

• Sperm cryopreservation for artificial insemination (AI) often results in cellular damage, compromising sperm viability and fertility.
• Current strategies to mitigate cryopreservation complications yield unsatisfactory outcomes.
• Extracellular vesicles (EVs) are emerging as a novel therapeutic approach due to their established roles in reproductive processes and their cargo-carrying capabilities.

Purpose of the Study:

• To review the complications associated with sperm cryopreservation.
• To explore conventional and modern strategies for overcoming these challenges.
• To highlight the potential of extracellular vesicles (EVs) and their engineering for improving cryopreserved sperm quality and fertility.

Main Methods:

• Review of existing literature on sperm cryopreservation, EV biology, and therapeutic applications.
• Analysis of studies investigating the use of EVs from various sources to repair cryoinjured sperm.
• Discussion of EV engineering techniques (direct and indirect) for tailored cargo delivery.

Main Results:

• EVs derived from animal and human cells have demonstrated improvements in sperm quality post-freeze-thawing.
• EVs can deliver essential molecules (proteins, nucleic acids) to repair sperm damage.
• Engineered EVs with specific cargos show enhanced potential for treating cryopreserved sperm.

Conclusions:

• EVs represent a promising strategy to address sperm cryopreservation-induced damage.
• EV engineering offers customized therapeutic solutions to enhance sperm viability and fertility.
• Further research and consideration of ethical aspects are needed to fully realize the potential of EVs in reducing infertility.