qRT-PCR results showed that the mRNA levels of VEGFA and SP1 in lung cancer cells were significantly higher than that in normal lung epithelial cells (relative VEGFA mRNA level: BEAS-2B 1.00 ± 0.06; A549 1.62 ± 0.14; H1975 3.36 ± 0.27, relative SP1 mRNA level: BEAS-2B 1.00 ± 0.05; A549 2.09 ± 0.34; H1975 3.76 ± 0.46) (Figure 3B). The gene discussed is SP1; the disease is lung cancer.