Vitrification of isolated mice blastomeres using a closed loading device.

Area of Science:

• Reproductive biology
• Developmental biology
• Cryobiology

Background:

• Isolated blastomeres from embryo biopsy are crucial for preimplantation genetic screening.
• Blastomeres, undifferentiated embryonic cells, contain complete genetic information.
• Efficient cryopreservation of blastomeres is vital for emerging technologies like stem cell research.

Purpose of the Study:

• To establish a novel method for cryopreserving individual isolated blastomeres.
• To assess the feasibility of using a closed vitrification system for blastomere preservation.
• To evaluate the post-warming survival rate of vitrified blastomeres.

Main Methods:

• Vitrification of isolated mouse blastomeres using a cryotip.
• Propagation and preservation in microvolumes within a closed system.
• Warming and assessment of blastomere viability post-cryopreservation.

Main Results:

• Demonstrated the first successful cryopreservation of individual isolated blastomeres in microvolumes.
• Achieved 100% post-warming survival rate for vitrified mouse blastomeres.
• Validated the efficacy of the closed vitrification system for blastomere preservation.

Conclusions:

• The developed closed vitrification method is highly effective for preserving isolated blastomeres.
• This technique ensures 100% blastomere survival, paving the way for future applications.
• Enables potential use of blastomeres for stem cell culture and differentiation control.