CD82 and nasopharyngeal carcinoma: In this study, immunohistochemistry and western blot analysis were used to detect the levels of KAI1/CD82 protein expression in five different human NPC cell lines, CNE-1, CNE-2Z, SUNE-1, SUNE-1-5-8F and SUNE -1-6-10B, and immunohistochemistry was also performed to detect the KAI1/CD82 protein expression in NPC and non-neoplastic nasopharyngeal tissues.