Abstract
The incidence of human papilloma virus (HPV)-associated head and neck squamous cell carcinoma (HNSCC) is increasing and implicated in more than 60% of all oropharyngeal carcinomas (OPSCCs). Although whole-genome, transcriptome, and proteome analyses have identified altered signaling pathways in HPV-induced HNSCCs, additional tools are needed to investigate the unique pathobiology of OPSCC. Herein, bioinformatics analyses of human HPV(+) HNSCCs revealed that all tumors express full-length E6 and identified molecular subtypes based on relative E6 and E7 expression levels. To recapitulate the levels, stoichiometric ratios, and anatomic location of E6/E7 expression, we generated a genetically engineered mouse model whereby balanced expression of E6/E7 is directed to the oropharyngeal epithelium. The addition of a mutant PIK3CAE545K allele leads to the rapid development of pre-malignant lesions marked by immune cell accumulation, and a subset of these lesions progress to OPSCC. This mouse provides a faithful immunocompetent model for testing treatments and investigating mechanisms of immunosuppression.
Keywords:
GEMM, human papilloma virus; HNSCC; HPV; HPV16; LumiFluor; OPSCC; genetically engineered mouse model; head and neck squamous cell carcinoma; immunocompetent; oncogene; oropharyngeal squamous cell carcinoma; tumor suppressor; tumorigenesis.
Copyright © 2019 The Author(s). Published by Elsevier Inc. All rights reserved.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Carcinogenesis / genetics
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Carcinogenesis / metabolism
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Cell Line, Tumor
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Class I Phosphatidylinositol 3-Kinases / genetics
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Class I Phosphatidylinositol 3-Kinases / metabolism
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Disease Models, Animal*
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Female
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Gene Expression
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Head and Neck Neoplasms / genetics
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Head and Neck Neoplasms / immunology
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Head and Neck Neoplasms / metabolism
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Head and Neck Neoplasms / virology*
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Humans
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Immunocompetence
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Internal Ribosome Entry Sites / genetics
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Male
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Mice
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Mice, Inbred C57BL
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Mice, Transgenic
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Natural Killer T-Cells / immunology
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Natural Killer T-Cells / metabolism
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Oncogene Proteins, Viral / genetics
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Oncogene Proteins, Viral / metabolism*
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Oropharyngeal Neoplasms / genetics
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Oropharyngeal Neoplasms / immunology
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Oropharyngeal Neoplasms / metabolism
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Oropharyngeal Neoplasms / virology*
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Papillomavirus E7 Proteins / genetics
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Papillomavirus E7 Proteins / metabolism*
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RNA Splicing / genetics
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RNA-Seq
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Repressor Proteins / genetics
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Repressor Proteins / metabolism*
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Squamous Cell Carcinoma of Head and Neck / genetics
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Squamous Cell Carcinoma of Head and Neck / immunology
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Squamous Cell Carcinoma of Head and Neck / metabolism
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Squamous Cell Carcinoma of Head and Neck / virology*
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T-Lymphocytes, Regulatory / immunology
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T-Lymphocytes, Regulatory / metabolism
Substances
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E6 protein, Human papillomavirus type 16
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Internal Ribosome Entry Sites
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Oncogene Proteins, Viral
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Papillomavirus E7 Proteins
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Repressor Proteins
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oncogene protein E7, Human papillomavirus type 16
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Class I Phosphatidylinositol 3-Kinases
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Pik3ca protein, mouse