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Updated: Jul 18, 2026
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Rapid Freezing using Sandwich Freezing Device for Good Ultrastructural Preservation of Biological Specimens in Electron Microscopy
Published on: July 19, 2021
Morphological study of endothelial cells during freezing.
A Zhang1, L X Xu, G A Sandison
1School of Life Science and Biotechnology, Shanghai Jiao Tong University, 200240, People's Republic of China.
Physics in Medicine and Biology
|November 18, 2006
Summary
Freezing during cryosurgery causes endothelial cell damage by dehydrating them, leading to cell shrinkage and detachment. This microvascular injury mechanism is crucial for understanding tissue damage in ablative cryosurgery.
Area of Science:
- Cell Biology
- Biophysics
- Cryobiology
Background:
- Microvascular injury is a key mechanism in ablative cryosurgery, with endothelial cells as the primary targets.
- The precise mechanisms of endothelial cell damage during freezing are not fully understood.
Purpose of the Study:
- To investigate the role of water dehydration in endothelial cell damage during cryosurgery.
- To understand how cooling rates affect endothelial cell integrity in a simulated tumor environment.
Main Methods:
- Endothelial cells were cultured in vitro on ECMatrix 625 to form tube-like vascular structures.
- The influence of water dehydration on cell integrity was analyzed under varying cooling rates.
- Quantitative analysis was performed to measure cell surface stresses.
Main Results:
- Initial cell shape changes were primarily driven by water dehydration, dependent on cooling rate, causing cell shrinkage.
- Prolonged cooling and lower temperatures induced further cell changes via chilling effects on proteins and focal adhesions.
- Freezing-induced dehydration significantly increased cell surface stresses, particularly in the axial direction.
Conclusions:
- Water dehydration is a critical factor in cryosurgery-induced endothelial cell damage.
- Increased cell surface stress due to dehydration contributes to cell junction disruption and detachment.
- Understanding these mechanisms can inform strategies to mitigate tissue damage in cryosurgery.
