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In vivo cytokeratin‐expression pattern of stratified squamous epithelium from human papillomavirus‐type‐16–immortalized ectocervical and foreskin keratinocytes
Author(s) -
Sun Qi,
Tsutsumi Kouichiro,
Yokoyama Masatoshi,
Pater Mary M.,
Pater Alan
Publication year - 1993
Publication title -
international journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.475
H-Index - 234
eISSN - 1097-0215
pISSN - 0020-7136
DOI - 10.1002/ijc.2910540422
Subject(s) - foreskin , cytokeratin , epithelium , human papillomavirus , keratinocyte , in vivo , pathology , keratin , involucrin , koilocyte , biology , medicine , immunohistochemistry , cell culture , cancer , cervical intraepithelial neoplasia , cervical cancer , genetics
The association between human papillomavirus (HPV) type 16 and cervical squamous‐cell carcinoma has been well documented, and HPV 16 DNA has been shown to immortalize human genital keratinocytes in vitro. Using a panel of cytokera‐tin(CK)‐specific antibodies, we examined the CK expression pattern, an important characteristic of epithelia, of the stratified squamous epithelium reconstructed in vivo from monolayer cultures of 2 human ectocervical and 3 human foreskin keratino‐cyte cell lines immortalized by HPV 16 DNA. Whereas the abnormal epithelium formed from these grafts presented certain aspects of mature terminal differentiation, such as morphology and expression of CKIO/II, the expression patterns for CK19, and especially CK13, were more obviously abnormal. CK18 expression was not detectable in any of the epithelia formed from the 5 cell lines. In contrast, for an HPV‐16–immortalized endocervical cell line and the CaSki cervicalcarcinoma cell line there was expression of CK18. Our results indicate that HPV‐16–induced immortalization of keratinocytes is associated with disruption of the normal CK expression pattern in stratified squamous epithelium and that expression of particular CKs can be differentially disrupted.