Fig. 2. Papilloma and squamous cell carcinoma formation. (A-B) Frequency of
papillomas (A) and SCCs (B); ++++, all mice in group deceased. (C)
Histopathological analysis of papillomas (pap) and SCCs. (D) Metastases from
Inv
6ß4 mice. (C,D left-hand panel) Stained with haematoxylin and
eosin; (D) other panels labelled with antibodies to the
6 transgene or
keratin 14. Bar, 100 µm. (E) Immunolocalization of phosphoSmad2 in wt and
Inv
6ß4
-transgenic epidermis, papillomas (pap) and SCCs;
ace, acetone treated; TPA, 24 hours after one dose of TPA. Bars, 50 µm
(epidermis), 100 µm (pap, SCC).