title: Immortalization of normal human bronchial epithelial cells by human papillomaviruses 16 or 18.
abstract: Human papillomaviruses (HPV) are associated with papillomatosis of the larynx, trachea, and bronchi in decreasing order of frequency, and these papillomatosis lesions may become malignant. When the patients are not selected for a history of papillomatosis, the frequency of HPV in bronchogenic carcinoma tissue is 1-5%. In order to develop a model for investigating the role of HPV in human bronchogenic carcinogenesis, normal human bronchial epithelial cells were transfected with cloned full-length HPV16 or HPV18. Two HPV18-transformed cell lines (BEP1 and BEP2) and one HPV16-transformed cell line (BEP3) were established. These nontumorigenic epithelial cell lines have: (a) attained over 100 population doublings in vitro; (b) mutually exclusive human marker chromosomes; (c) HPV DNA in forms that are consistent with chromosomal integration by Southern analysis; (d) HPV E6, E7, and E6* mRNA transcripts by Northern and reverse transcriptase-polymerase chain reaction analysis; and (e) diminished confluence-induced squamous differentiation. These cell lines should be useful for studying mechanisms involved in proliferation, differentiation, and neoplastic transformation of human bronchial epithelial cells.
authors.affiliation: Laboratory of Human Carcinogenesis, National Cancer Institute, NIH, Bethesda, Maryland 20892.
authors.forename: J C
authors.initials: JC
authors.lastname: Willey
authors.forename: A
authors.initials: A
authors.lastname: Broussoud
authors.forename: A
authors.initials: A
authors.lastname: Sleemi
authors.forename: W P
authors.initials: WP
authors.lastname: Bennett
authors.forename: P
authors.initials: P
authors.lastname: Cerutti
authors.forename: C C
authors.initials: CC
authors.lastname: Harris
mesh_terms: D001483:Base Sequence; D015152:Blotting, Northern; D015139:Blotting, Southern; D001980:Bronchi / Q000382:microbiology*; D002460:Cell Line; D002472:Cell Transformation, Viral / Q000235:genetics*; D002874:Chromosome Mapping; D016172:DNA Fingerprinting; D004848:Epithelium; D006801:Humans; D007633:Keratins / Q000096:biosynthesis; D008969:Molecular Sequence Data; D027383:Papillomaviridae / Q000235:genetics; D010957:Plasmids; D016133:Polymerase Chain Reaction; D014158:Transcription, Genetic; D014162:Transfection
chemical_list: D007633:Keratins