A progenitor cell model for the fallopian tube in which Krt7 identifies the progenitor
cell and PAX2n defines progenitor cell expansion. Expanding PAX2n
cells can differentiate into basal or ciliated cells in WCNs or Type 1 SCOUTs, both of
which approximate normal differentiation pathways, with loss of ALDH1 and normal or
minimally increased expression of LEF1, RCN1, Stathmin and EZH2. In contrast, Type 2
SCOUTs and STINs (right) share a different expression signature characterized by multiple
genes, including EZH2, LEF1, RCN1, and stathmin and others involved in a divergent pathway
of progenitor cell growth.