PSMB9 and nasopharyngeal carcinoma: Therefore, therapeutic vaccines for NPC have mainly focused on EBV proteins in the past few years, such as autologous DCs incubated with LMP2 peptides 87, total RNA derived from a C666-1 cell line retaining EBV 88, and a fusion protein containing the carboxyl terminus of EBNA-1 fused to LMP2 89.