CapG protein and mRNA expression in normal tissues, OPLs, and primary OSCCs. A: CapG protein expression in OPLs (n = 28) and OSCCs (n = 79) is significantly higher than in normal oral tissues (n = 79; P < 0.01, Mann-Whitney's U-test). The results are expressed as the mean ± SD; B: States of CapG protein expression in early-stage (I and II) OSCC (n = 27) and advanced stages (III and IV) OSCC (n = 52) are compared. CapG protein expression in advanced stages is significantly higher than in the early stages (P < 0.001, Mann-Whitney U-test); C: Comparison of CapG mRNA expression levels between CapG-positive and CapG-negative cases in primary OSCCs classified by IHC analysis. There is a significant difference in the CapG mRNA expression levels between the negative and positive cases (P < 0.001, Mann-Whitney's U-test).