The apoptosis rate in CNE2-TFPI-2 cells (63.45% ± 8.28%) was significantly higher than that in the empty vector control (38.07% ± 12.38%) in 5 independent tests (Figure 9), which suggests that TFPI-2 induces apoptosis in NPC cells. The gene discussed is TFPI; the disease is nasopharyngeal carcinoma.