Abstract
Isolated rabbit corneae were stored at a temperature of 4 degrees C in McCoy's 5a medium (modified) containing 5% dextran T 40 and gentamycin sulphate (250 mug/ml) for a varied number of days. The endothelium of the corneae was examined by light- and electron-microscopic histochemical methods for ATPase, TPPase, and SDH. The activity of each enzyme in the endothelia, stored for 6 days, was found to resemble the enzyme activities in the fresh corneal endothelium. By 8 days, the SDH activity was lowered and specific staining for ATPase and TPPase was decreased. In the 12 day-stored endothelium, the SDH and TPPase activities could not be detected. From these results, it was gathered that the isolated cornea stored in the medium for 6 days may be used in keratoplasty.
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