RESUMEN
BACKGROUND: Increasing evidence indicates an etiological role of human papillomavirus (HPV) in head and neck cancers, particularly oropharyngeal squamous cell carcinoma (OPSCC). However, the association between HPV and other cancers, including esophageal and tongue remains unclear. This study delineated the molecular characteristics of HPV18 E6 and E7 in esophageal (EC109 and EC9706) and tongue (Tca83) cancer cell lines with reference to cervical cancer (HeLa). METHODS: We analysed the HPV transcription profiles of esophageal and tongue cancer cells through Next-generation RNA sequencing, and the role of HPV18 E6 and E7 in these cells was assessed via siRNA approach, Western blotting and immunofluorescence assays. RESULTS: Overall, the HPV transcription profiles of esophageal and tongue cancer cells mimicked that of cervical cancer cells, with notable disruption of E2, and expression of E6, spliced E6 (E6*), E7, E1 and L1 transcripts. As with cervical cancer cells, p53 and its downstream transactivation target, p21, were found to be the major targets of E6 in esophageal and tongue cancer cell lines. Intriguingly, E7 preferentially targeted p130 in the two esophageal cancer cell lines, instead of pRb as in cervical cancer. Tca83 exhibited an E7 to E6 transcript ratio comparable to HeLa (cervix), targeted the ERK1/2 and MMP2 pathways, and was dependent on E6 and E7 to survive and proliferate. In contrast, both the esophageal cancer cell lines were distinct from HeLa in these aspects. CONCLUSIONS: This is the first study that delineates transcript expression and protein interaction of HPV18 E6 and E7 in esophageal and tongue cancer cell lines, suggesting that HPV plays a role in inducing these cancers, albeit via distinct pathways than those observed in cervical cancer.
Asunto(s)
Proteínas de Unión al ADN/metabolismo , Neoplasias Esofágicas/virología , Carcinoma de Células Escamosas de Esófago/virología , Papillomavirus Humano 18/fisiología , Proteínas Oncogénicas Virales/metabolismo , Proteínas E7 de Papillomavirus/metabolismo , Carcinoma de Células Escamosas de Cabeza y Cuello/virología , Neoplasias de la Lengua/virología , Línea Celular Tumoral , Proteínas de Unión al ADN/biosíntesis , Proteínas de Unión al ADN/genética , Neoplasias Esofágicas/metabolismo , Neoplasias Esofágicas/patología , Carcinoma de Células Escamosas de Esófago/metabolismo , Carcinoma de Células Escamosas de Esófago/patología , Femenino , Células HeLa , Papillomavirus Humano 18/genética , Papillomavirus Humano 18/metabolismo , Humanos , Proteínas Oncogénicas Virales/biosíntesis , Proteínas Oncogénicas Virales/genética , Proteínas E7 de Papillomavirus/biosíntesis , Proteínas E7 de Papillomavirus/genética , Carcinoma de Células Escamosas de Cabeza y Cuello/metabolismo , Carcinoma de Células Escamosas de Cabeza y Cuello/patología , Neoplasias de la Lengua/metabolismo , Neoplasias de la Lengua/patologíaRESUMEN
Following publication of the original article [1], the authors reported that during the production process, Table 1 was omitted.
