Optimization of UC-MSCs cold-chain storage by minimizing temperature fluctuations using an automatic cryopreservation...

Area of Science:

• Regenerative Medicine
• Cell Biology
• Biotechnology

Background:

• Effective cryopreservation of human mesenchymal stem cells (hMSCs) is vital for regenerative medicine and tissue engineering.
• Current manual cryopreservation methods expose cells to temperature fluctuations, impacting their viability and function.
• Ensuring off-the-shelf availability of human umbilical cord-derived mesenchymal stromal cells (UC-MSCs) necessitates improved, safe, and efficient cryopreservation protocols.

Purpose of the Study:

• To design and evaluate an automatic cryopreservation system for UC-MSCs.
• To compare the impact of manual versus automatic cryopreservation on UC-MSC quality after repeated temperature cycles.
• To assess the viability, recovery, proliferation, adherence, and differentiation potential of UC-MSCs preserved using both methods.

Main Methods:

• UC-MSCs underwent 400 cycles of simulated manual cryopreservation (transfer between liquid nitrogen and room temperature).
• UC-MSCs from the same batch were processed using an automatic cryopreservation system, maintaining a consistent cold chain below -150°C.
• Key cell parameters including viability, recovery, adherence, proliferation, and multilineage differentiation were assessed post-cryopreservation.

Main Results:

• UC-MSCs processed by the automatic system exhibited significantly higher viability and percent recovery compared to the manual method.
• The automatic cryopreservation approach led to enhanced cell proliferation and improved adherence capabilities.
• Cells preserved automatically demonstrated a greater potential for multilineage differentiation after 400 temperature cycles.

Conclusions:

• The developed automatic cryopreservation system effectively mitigates temperature fluctuations, preserving UC-MSC quality.
• This automated cold chain system offers a reliable and efficient solution for manufacturing and banking UC-MSCs.
• Improved cryopreservation protocols enhance the off-the-shelf availability of UC-MSCs for widespread regenerative medicine applications.