Abstract：
:We compared endothelial cell survival in human corneas after cryopreservation by three methods that utilize dimethyl sulfoxide. Twenty-eight human cadaver corneas were cryopreserved by one of three methods, stored briefly over liquid nitrogen, thawed, cultured at 37 degrees C for 3 days, and fixed for scanning electron microscopy. Seventeen control corneas underwent identical cryoprotectant immersion and culture protocols but were not frozen. Endothelial photographs taken after 1 and 3 days of culture were analyzed. Endothelial cell losses in cryopreserved corneas by Methods 1, 2, and 3, respectively, were 36, 22, and 10% after 1 day of culture and 57, 36, and 27% after 3 days of culture. Cryopreservation by Method 3 had less cell loss than Methods 1 or 2 (P<0.02) but greater cell loss than the control corneas for Method 3 (P<0.001). No loss of cells occurred in the control corneas for Methods 1 and 3 but substantial cell loss (26%) occurred in the control corneas for Method 2. Polymegethism and pleomorphism of the endothelial cells were seen in the corneas that lost cells. The endothelial cell loss of 10% seen after 1 day of culture in human corneas cryopreserved by Method 3 is similar to the loss that occurs during organ culture storage as currently used clinically and therefore would be acceptable for clinical use. After 3 days of culture, however, the cell loss had increased significantly to 27%. This additional decrease in cell number that occurs in culture may represent latent cryodamage and must be understood and overcome in vivo before the technique can be used clinically.
journal_name
Cryobiologyjournal_title
Cryobiologyauthors
Bourne WM,Nelson LR,Hodge DOdoi
10.1006/cryo.1999.2182subject
Has Abstractpub_date
1999-08-01 00:00:00pages
47-57issue
1eissn
0011-2240issn
1090-2392pii
S0011-2240(99)92182-Xjournal_volume
39pub_type
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