Abstract:
:Human monocytes purified from peripheral blood by counterflow centrifugal elutriation were cryopreserved in a vitreous state at 1 atm pressure. The vitrification solution was Hanks' balanced salt solution (HBSS) containing (w/v) 20.5% Me2SO, 15.5% acetamide, 10% propylene glycol, and 6% polyethylene glycol. Fifteen milliliters of this solution was added dropwise to 1 ml of a concentrated monocyte suspension at 0 degrees C. Of this, 0.8 ml was drawn into silicone tubing and rapidly cooled to liquid nitrogen temperature, stored for various periods, and rapidly warmed in an ice bath. The vitrification solution was removed by slow addition of HBSS containing 20% fetal calf serum. The numerical cell recovery was about 92% and most of these retained normal phagocytic and chemotactic ability. Differential scanning calorimeter records of the solution show a glass transition at -115 degrees C during cooling and warming, but no evidence of ice formation during cooling. Devitrification occurs at about -70 degrees C during warming at rates as rapid as 80 degrees C/min. The amount of devitrification is dependent upon the warming rate. Freeze-fracture freeze-etch electron microscope observations revealed no ice either intra- or extracellularly in samples rapidly cooled to liquid nitrogen temperatures except for small amounts in some cellular organelles. However, if these cell suspensions were warmed rapidly to -70 degrees C and then held for 5 min, allowing devitrification to occur, the preparation contained significant amounts of both intra- and extracellular ice. Biological data showed that this devitrification was associated with severe loss of cell function.
journal_name
Cryobiologyjournal_title
Cryobiologyauthors
Takahashi T,Hirsh A,Erbe EF,Bross JB,Steere RL,Williams RJdoi
10.1016/0011-2240(86)90001-5subject
Has Abstractpub_date
1986-04-01 00:00:00pages
103-15issue
2eissn
0011-2240issn
1090-2392pii
0011-2240(86)90001-5journal_volume
23pub_type
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