Expression of DNMT3B, VAV3, SORBS2 and GPR137 in human cancer by RT-qPCR. A: mRNA expression levels of DNMT3B in cervical cancer and normal cervix. The mRNA expression levels of GAPDH were used as internal control. B: mRNA expression levels of DNMT3B, VAV3, SORBS2 and GPR137 in cervical, lung and breast cancer cell lines. The data are presented as the fold change in cancer cell line relative to HaCaT cell line. The bars represent the mean ± standard deviation from at least three independent experiments. *P < 0.05.