Freezing lab-grown immune cells doesn't kill them with ice; it basically causes them to have a metabolic 'overdose' from the cold.
March 30, 2026
Original Paper
A Conserved Metabolic Oxidative Axis Underlies Immune Cell Cryo-vulnerability
bioRxiv · 10.64898/2026.03.26.714376
The Takeaway
Researchers found that freezing triggers a specific metabolic pathway that causes cells to choke on their own waste products, leading to only 25% survival. By simply 'pausing' the cells' metabolism and adding antioxidants before freezing, they boosted survival to 90%.
From the abstract
Immunotherapy has emerged as a transformative approach for treating cancer and other diseases, yet its widespread deployment requires effective cryopreservation strategies to enable scalable global distribution. However, many immune cell types remain acutely vulnerable to freeze-thaw stress, and the underlying mechanisms of this cryo-vulnerability are not well defined. In this study, we combined metabolic flux analysis, ROS quantification, lipidomics, and preclinical xenograft models to investig