Figure 1 (A) A1–A4 represents Pearson’s correlation analysis of GSE20510, GSE65654, GSE32346, and GSE130489 datasets, respectively. The color reflects the intensity of the correlation. The greater the absolute value of a number, the higher the correlation. (B1–B4) PCA of samples from the GSE20510, GSE65654, GSE32346, and GSE130489 datasets. In the figure, the x-axis is principal component 1 (PC1) and the y-axis is principal component 2 (PC2). (C1–C4) The volcano plot of the GSE20510, GSE65654, GSE32346, and GSE130489 datasets. (D1) Circos of GSE20510 and GSE65654 was performed using the online tool Omistudio. The outer circle represents gene lists, the inner circle represents the gene expression level, and the red curve represents the overlap between differentially expressed gene lists. (D2) Circos of GSE32346 and GSE130489. (E1, E2) 177 sharing genes between the GSE20510 and GSE65654 datasets are shown in Venn diagram, and 189 differentially expressed miRNAs were contained in the GSE32346 and GSE130489 simultaneously.