Fig. 1. Overexpression of SIRT1 in metastatic melanoma.
a A analysis of SIRT1 mRNA expression in primary melanoma (n = 103) and metastatic melanoma (n = 370). The RNA data were downloaded from the TCGA database. b, c Analysis of SIRT1 mRNA levels in primary and metastatic melanoma tissues from the GSE46517 and GSE8401 public data sets. d The expression of SIRT1 in the primary and metastatic melanoma tissues was analyzed by IHC. e The relationship between SIRT1 expression and the melanoma tissue type was evaluated using Pearson’s χ2 test