Pf. Lambert et al., EPIDERMAL CANCER-ASSOCIATED WITH EXPRESSION OF HUMAN PAPILLOMAVIRUS TYPE-16 E6-ONCOGENES AND E7-ONCOGENES IN THE SKIN OF TRANSGENIC MICE, Proceedings of the National Academy of Sciences of the United Statesof America, 90(12), 1993, pp. 5583-5587
Certain ''high-risk'' anogenital human papillomaviruses (HPVs) have be
en associated with the majority of human cervical carcinomas. In these
cancers, two papillomaviral genes, E6 and E7, are commonly expressed.
In this study we provide evidence that expression of the E6 and E7 ge
nes from the high-risk HPV-16 in the skin of transgenic mice potentiat
ed the development of preneoplastic lesions, and a high percentage of
these epidermal lesions subsequently developed into locally invasive c
ancers. High levels of E6/E7 expression were found in these tumors rel
ative to the preneoplastic lesions, and expression was localized to th
e proliferating, poorly differentiated epidermal cells. Also, the p53
and Rb genes were found to be intact, not mutationally inactivated, in
representative skin tumors. These findings demonstrate that the E6 an
d E7 genes from a papillomavirus etiologically associated with human c
ervical cancer can contribute to the development of epidermal cancers
in an animal model.