Fig. 2.
PKNOX2 expression and promoter methylation in primary GC. a PKNOX2 mRNA expression was down-regulated in 28 pairs of primary GC compared with adjacent normal tissues in the Hong Kong GC cohort (P < 0.0001). b PKNOX2 mRNA expression in paired and non-paired GC samples from TCGA database (P < 0.0001). c MSP and (d) BGS analysis demonstrated PKNOX2 promoter methylation in primary GC compared with adjacent normal tissues (P < 0.0001). e PKNOX2 promoter methylation was inversely associated with its mRNA expression in TCGA GC cohort (R = -0.3312, P < 0.0001). f PKNOX2 promoter methylation was correlated with poor survival in GC patients (P < 0.05)