Key Takeaways
- Research on cryoprotectant effects on brain cells shows potential recovery in cell structure.
- Greg Fahy and his team have made advancements in preserving brain samples using cryogenic methods.
- Initial preservation of samples included no observable cracks, although detailed photography was lost.
Research on Brain Preservation
Greg Fahy played a key role in a recent study on the preservation of human brain tissues through cryogenics. Following biopsy sampling, the samples were stored in liquid nitrogen while the remaining brain tissue was cooled in a temperature-controlled environment at Alcor. Years after the samples were taken, Fahy focused on understanding how the cryoprotectant used during the preservation could potentially damage brain cells.
Cryoprotectants, while necessary, have been shown to distort cell structures. Previous advancements in freezing processes, particularly in vitrifying eggs and embryos, laid the groundwork for this research. However, preserving larger organs and tissues remains more complex due to uniform cooling challenges and the risk of ice crystal formation and cracking.
Fahy’s initial findings revealed that, upon rehydration and rewarming, the structure of the brain cells showed some recovery. Demonstrating this during a conference call, he indicated how the cells could regain a semblance of their original shape. Despite some loss of pristine structure, Fahy revealed that intricate details of the cells were still visible, leading him to conclude, “It seems that [by taking the cryogenic approach] you can preserve everything.”
Difficulties surrounding cracking were initially a concern. However, Fahy stated that the team responsible for the original preservation reported no cracks. Unfortunately, images taken during the early stages were lost due to a server malfunction, leaving the current observations of the frost-coated brain inconclusive regarding any damage. The team has opted against attempts to remove the frost, which could risk harming the sample.
In the follow-up process, Fahy and his colleagues chemically ‘fixed’ the brain samples after rewarming. This fixation process is vital for stopping decay but effectively leads to the cessation of life in the samples. Fahy’s ongoing research aims to better understand the impacts of cryogenic methods on brain tissue preservation, potentially paving the way for future advancements in the field.
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