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. 2018 Jul 16;28(4):355–364. doi: 10.1097/CEJ.0000000000000461

Fig. 3.

Fig. 3

(a) mRNA expression levels of cyclinD1 and CDK4 genes in human bronchial epithelia cells pretreated with 50, 100, 250, and 500 nmol/l folic acid and exposed to 32 μmol/l benzo(a)pyrene (BaP) for 24 h. Data represent the mean±standard error values of three independent experiments. (b) CyclinD1 and CDK4 protein expression levels in human bronchial epithelia cells pretreated with 50, 100, 250, and 500 nmol/l folic acid and exposed to 32 μmol/l BaP for 24 h. Data represent the mean±standard error values of three independent experiments. Compared with the positive control group, *P<0.05 and **P<0.01, compared with the negative control group, and ##P<0.01.