MAOA and non-small cell lung carcinoma: Our results showed that HIF-1α protein accumulation in 16 E7-MAOA KO cells was significantly lower than that in 16 E7 cells (Figure 4D), suggesting that MAOA knockout promoted the degradation of HPV-16 E7-induced HIF-1α protein possibly via 26S proteasome pathway in NSCLC cells.