Large-scale compatible methods for the preservation of human embryonic stem cells: current perspectives

Area of Science:

• Stem Cell Biology
• Cryobiology
• Biotechnology

Background:

• Human embryonic stem cells (hESCs) possess significant therapeutic and drug screening potential.
• Effective cell preservation is vital for quality control, inter-site transport, and reducing continuous culture demands.
• Current preservation methods like slow freezing and vitrification have limitations in scalability.

Purpose of the Study:

• To review the scalability of slow freezing and vitrification for human embryonic stem cells (hESCs).
• To identify and assess barriers to large-scale cryopreservation of hESCs.
• To explore alternative preservation methods for hESCs.

Main Methods:

• Review of existing literature on hESC cryopreservation techniques.
• Analysis of scalability challenges associated with slow freezing and vitrification.
• Consideration of lyophilization as an alternative storage method.

Main Results:

• Existing cryopreservation methods (slow freezing, vitrification) can preserve hESCs but face scalability issues.
• Slow freezing is a likely candidate for large-scale hESC cryopreservation due to precedent in other mammalian cells and compatibility with culture methods.
• Significant gaps exist between the cell quantities needed for applications and current preservation capacities.

Conclusions:

• Slow freezing presents a viable option for scaling up hESC cryopreservation.
• Overcoming scalability barriers is essential for widespread therapeutic and screening use of hESCs.
• Lyophilization offers a potential alternative for long-term hESC storage, warranting further investigation.