Conduction-Dominated Cryomesh for Organism Vitrification

Area of Science:

• Cryobiology
• Materials Science
• Biotechnology

Background:

• Vitrification-based cryopreservation is crucial for long-term storage of biological samples.
• Current cryomesh systems offer rapid cooling but require enhanced rates for broader application.
• Increased cooling rates are essential for improving biosystem viability and expanding cryopreservation capabilities.

Purpose of the Study:

• To enhance cryopreservation techniques by improving cooling rates through conductive heat transfer.
• To investigate the impact of conduction-dominated cryomesh on vitrification efficiency and biosystem survival.
• To demonstrate the scalability and applicability of the improved cryomesh system for various biological samples.

Main Methods:

• Development and implementation of a conduction-dominated cryomesh system.
• Optimization of key parameters: thermal conductivity, mesh dimensions, and liquid nitrogen immersion technique.
• Testing the system's efficacy on diverse biological models including coral larvae, Drosophila embryos, and zebrafish embryos.

Main Results:

• Achieved twofold to tenfold increase in cooling rates (0.24 to 1.2 × 10^5 °C min⁻¹).
• Successfully vitrified coral larvae, Drosophila embryos, and zebrafish embryos with enhanced outcomes.
• Demonstrated improved viability and successful cryopreservation across µm to mm scale biosystems.

Conclusions:

• Conduction-dominated cryomesh significantly improves vitrification cooling rates and biosystem viability.
• The technology provides a scalable solution for biorepositories, agriculture, aquaculture, and scientific research.
• This advancement broadens the scope of cryopreservation for critical biological resources.