FOXO3 and hepatocellular carcinoma: Although we did not observe any significant difference of FOXO3 mRNA expression between livers from HCC patients and non-HCC patients (n = 11, P = 0.10) (Fig. 1c), we observed FOXO3-positivity in HCC patients mainly in cancer cells but not in stroma, where FOXO3 was localized in the nucleus (Fig. 1a, b).