Because SIRT1 is mainly localized in the cytosol of human colon cancer cell lines (Fig. 1A,B), it is unlikely that SIRT1 acts as a transcriptional coactivator to enhance the expression of IL‐6 and IL‐8 or induces histone deacetylation to epigenetically silence the genes that are involved in inhibition of their transcription. This evidence concerns the gene IL6 and malignant colon neoplasm.