Abstract
Using immunofluorescence and electron microscopy, we have demonstrated the presence of "foetal substances" (antigens) in skin kept in tissue culture medium for periods of time ranging from 9 days-18 weeks. This is a specific reaction demonstrated with an anti-human foetal serum raised in New Zealand white rabbits. It is suggested that the expression of foetal substances by cells in the skin under these abnormal conditions might lead to the masking or modification of the normal histo-compatible antigens, enabling such skins to survive transplantation without rejection.
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