LMP1 encoded by Epstein–Barr virus may activate AHR through the ERK pathway in nasopharyngeal carcinoma cells

Aim: To investigate the role of AHR in nasopharyngeal carcinoma (NPC) and explore the relationship between Epstein–Barr virus (EBV) infection and the AHR pathway. Methods: The effect of LMP1 on the expression of AHR was analyzed using real-time PCR and western blot. Proliferation and migration of cells were assessed using CCK8 and Transwell analysis. Results: EBV infection downregulated the expression of AHR in NPC cells, possibly through activation of the ERK pathway by LMP1 thereby accelerating AHR proteasomal degradation following translocation to the nucleus. Cell proliferation, migration and autophagy are promoted by activating the AHR pathway. Conclusion: In NPC cells, LMP1 increases the phosphorylation of ERK, which may activate the AHR pathway.