HPV18 E6 and E7 Intratumour Heterogeneity in Esophageal Cancer
- 1 Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science and Bio-Engineering, Beijing University of Technology, Beijing, China
- 2 Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science and Bio-Engineering, Beijing University of Technology, Beijing, China
- 3 Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science and Bio-Engineering, Beijing University of Technology, Beijing, China
- 4 Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science and Bio-Engineering, Beijing University of Technology, Beijing, China
- 5 Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science and Bio-Engineering, Beijing University of Technology, Beijing, China
- 6 Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science and Bio-Engineering, Beijing University of Technology, Beijing, China
- 7 State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Beijing, China
Abstract
The development of esophageal cancer accompanied by the presence of human papillomavirus (HPV) DNA into the host genome. By evaluating the expression of this virus for tumor cell origin and also their cell grows and migrations, we examined esophageal cancer clonality in the context of intra-tumor heterogeneity. In this research, we have checked the expression of HPV18 E6 and E7 in different single cell clones by the manual cell picking method in the HPV positive esophageal cancer (EC109), EC109 cell line used as a negative control, and Hela cell line used as the positive control. Quantitative real-time PCR (QRT-PCR) was run to detect the expression levels of HPV E6 and E7, Cell Counting Kit-8 (CCK-8) assay was used to examine cell proliferation, invasion assays performed using Costar chambers and wounding assay to study cell migrations in vitro . We investigated the intra-tumor heterogeneity of HPV E6 and E7 in esophageal cancer and the evaluation of the growth and migrations at the clonal level, using 10 single cell clones. In particular clones, C7 & C10 displayed a highly variable expression in both HPV E6 and E7 and weak in four clones (C1, C3, C4, and C9) consequently, the cell invasion, proliferation, and migration increase with increasing the level of HPV expression and inverse. In conclusion, the resulting based on single cell cloning showed the relationship between HPV and cell growth and migration in esophageal cancer. Future study in HPV DNA integration needed to explore the mains specific integration site of HPV DNA in esophageal cancer and molecular monitoring of the HPV for future prevention researches and also effective therapeutic strategies.
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