EPHB2 as a recurrence-related gene and a prognostic indicator in nasopharyngeal carcinoma: A bioinformatics screening and immunohistochemistry verification.

Recurrence and metastasis of nasopharyngeal carcinoma (NPC) after radical treatment is a major bottleneck in clinical treatment. Therefore, we aimed to find the genes related to metastasis after radical treatment in NPC patients. Public datasets in the Gene Expression Omnibus database were consulted and the differential expression genes (DEGs) were screened out. The possible roles of the DEGs were annotated by Gene Ontology, and pathway analysis. The hub genes/proteins were then filtered out through protein-protein interaction network construction. The key genes were sifted out from the hub genes, and their expressions were verified by qPCR and immunohistochemistry assays. A total of 28 DEGs were filtered out, which may be enriched in different signaling pathways. Of these DEGs, 11 hub genes were filtered out, among which EPHB2 was shown to be over-expressed in NPC tissues. Further experimental assays confirmed that EPHB2 was overexpressed in NPC cells, which might be associated with tumor recurrence, neck lymph node metastasis, and advanced clinical stages. Moreover, high EPHB2 expression predicted poor prognosis in NPC patients. EPHB2 might be a novel recurrence-related biomarker and a prognostic factor for NPC. Moreover, it might also be used as a potential treatment target for NPC.