One of the characteristics of the epidermnis that makes it an attractive ti
ssue for gene therapy is that it is renewed through proliferation of stem c
ells. If the stem cells can be transduced with the gene of interest then ex
pression of that gene should continue throughout adult life. This article d
iscusses current research on epidermal stem cells, highlighting progress in
their identification and in discovering the mechanisms that regulate exit
from the stem cell compartment.