SIRT1 and sarcoma: Positive expression of SIRT1, DBC1, P53, β-catenin, and cyclin D1 were seen in 71% (74 of 104), 74% (77 of 104), 53% (55 of 104), 48% (50 of 104), and 73% (76 of 104) of sarcomas, respectively.