Post-thaw Survival
Post-thaw Survival - Related Videos
07:32
Freezing, Thawing, and Packaging Cells for Transport
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Cited by 2 •
2008
Cultured mammalian cells are used extensively in cell biology studies. This video describes the basic skills required to freeze and store cells and how to recover frozen stocks.
08:18
Degassing Liquids with Freeze-Pump-Thaw Cycling
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2023
Source: Laboratory of Dr. Neil Branda — Simon Fraser University Degassing refers to the process by which dissolved gases are removed from a liquid. The presence of dissolved gases such as oxygen or carbon dioxide can impede chemical reactions that utilize sensitive reagents, interfere with spectroscopic measurements, or can induce unwanted bubble formation. A number of different techniques are available for degassing liquids; some of these include heating, ultrasonic agitation, chemical...
08:49
Freezing and Thawing Human Embryonic Stem Cells
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Cited by 6 •
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Since James Thomson et al developed a technique in 1998 to isolate and grow hES in culture, freezing cells for later use and thawing and expanding cells from a frozen stock have become important procedures performed in routine hES cell culture. Since hES cells are very sensitive to the stresses of freezing and thawing, special care must taken. Here we demonstrate the proper technique for rapidly thawing hES cells from liquid nitrogen stocks, plating them on mouse embryonic feeder cells, and...
02:52
Cellular Impedance-Based Survival Kinetics Assay to Assess Virus Survival
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2025
This video describes a cellular impedance-based technique to study the survival kinetics of viruses that induce cytopathic effects. The method measures the electrical impedance of virus-infected adherent cells pre-treated with saline.
00:08
Survivable Stereotaxic Surgery in Rodents
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Cited by 50 •
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The monitoring of extracellular neurotransmitter levels in distinct brain regions of freely moving animals offers insights on the link between neurotransmitter release and behavior. In vivo microdialysis coupled with electrochemical detection provides excellent anatomical and chemical resolution; and information on how basal neurotransmission is altered by pharmacological or physiological manipulations.
FAQs
Post-thaw survival depends strongly on how freezing and warming are controlled, not simply on whether a sample was stored at low temperature. Cryoprotectants help limit injury, while controlled cooling reduces damaging ice-crystal formation. Appropriate warming rates then support recovery during thawing. Together, these factors influence whether membranes remain intact and whether cells or other preserved materials retain function after warming.
Ice crystals, membrane damage, and osmotic stress are linked but distinct sources of injury. Ice formation can disrupt biological structures, membrane damage can compromise cellular boundaries, and osmotic stress can impose additional strain during temperature changes. Considering these mechanisms separately helps researchers identify which part of a cryopreservation protocol needs adjustment and explains why similar samples may show different survival outcomes.
No single measurement fully captures recovery after thawing. Membrane integrity indicates whether cellular boundaries remain intact, whereas metabolic activity provides evidence of ongoing biological function. Recovery and continued growth add longer-term information that an immediate viability measurement may miss. Using these complementary outcomes allows researchers to compare protocols more meaningfully and distinguish short-term survival from sustained biological performance.
A typical evaluation begins with cryopreservation under selected cryoprotectant, cooling, and storage conditions, followed by warming at an appropriate rate. Researchers then assess the recovered material using indicators such as membrane integrity, metabolic activity, recovery, or continued growth. Comparing these results across protocols reveals how processing conditions affect viability and supports optimization for the specific biological material being stored.
Post-thaw survival is especially important when biological material must be stored and used later. In biology, the approach supports cell lines, reproductive material, stem cells, tissues, and experimental samples. Measuring survival after warming helps determine whether stored material remains suitable for research, clinical applications, or biobanking, rather than assuming that successful preservation automatically guarantees later usability.
Different materials may respond differently to the same preservation strategy, so protocol performance should be judged with outcomes relevant to the sample. Continued growth may be informative for some stored biological materials, while recovery or functional viability may guide evaluation of others. This outcome-based comparison helps connect cryopreservation conditions with practical decisions about later use in biological research.