[The role of EPR-1 in proliferation and apoptosis in nasopharyngeal carcinoma].
To investigate the relationship between the expression of effector cell protease receptor-1 (EPR-1) of coagulation serine protease factor Xa, proliferative index (Pi) ki-67 and apoptotic index (AI) in nasopharyngeal carcinoma. Using immunohistochemical S-P staining and terminal deoxynucleotidyl transferase mediate dUTP nick and labeling (TUNEL) technique, the expression of EPR-1, ki-67 and AI was detected in the paraffin-embedded specimens including 42 nasopharyngeal carcinoma tissues, 42 normal nasopharyngeal tissues adjacent to the tumors tissues and 30 chronic nasopharyngitis tissues. The positive rate of EPR-1 expression in the NPC tissues, normal nasopharyngeal tissues adjacent to the tumors and chronic nasopharyngeal tissues was 76.1%, 90.5%,100.0%, respectively. EPR-1 was positively correlated with AI and negatively with ki-67. EPR-1 play a role in increase the apoptosis and decrease the proliferation of cell. These suggest that EPR-1 may be a potential therapy for NPC.