THY1 and nasopharyngeal carcinoma: The immunofluorescent (IF) staining of E-cadherin and β-catenin (two important components of adherens junctions) showed that adherens junctions were observed in both HONE1 and the EBV-positive NPC43 with the exogenous THY1, while the signals in the vector-alone were very weak (Figure 1A), indicating that the presence of THY1 can help to maintain the adherens junctions in NPC cells.