Dermal sheath or dermal papilla cells are immune-resistant. Past research has shown that transplanting these cells from the donor to the recipient leads to the development/growth of hair follicles. Why can't these cells be immediately transplanted from the donor (can be deceased) to the recipient? For example, Dr. Jahoda transplanted his dermal sheath cells to his wife who grew hair on her arm. There was no rejection of the hair.
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