Immunohistochemical analyses of 104 conventional adenomas with low- and high-grade dysplasia and of 157 serrated lesions revealed that elevated expression of c-MYC, NAMPT, and SIRT1 characterized all conventional and serrated adenomas, whereas DBC1 was not differentially regulated.
Sirt-1 protein level was significantly highly expressed in colorectal adenocarcinoma compared to normal and adenoma colonic tissue and positively correlated with NANOG.
SIRT1 protein expression in a paraffin-embedded tissue microarray, including 13 benign adenomas, nine liver metastasis tissues, and 120 paired colorectal cancer and normal mucosa tissues, was measured by immunohistochemistry.