The mRNA profile of GABA receptors in NSCLC cell lines. Figure 2A show that GABRA3, GABRB3, GABRE, GABRP, GABBR1 and GABBR2 ecpress in NSCLC cell lines. Brain expression acts as a positive control and BEAS-2B as a negative control. Figure 2B show three times of the PCR for gene relative expression. * P < 0.05, ** P < 0.01.