Fig. 1

Gene expression profile in CD4+ T cells of polymyositis (PM) and dermatomyositis (DM) patients. a Principal components (PCs) 1 and 2 plotted according to the diagnosis of the patients in a dataset of 21,008 genes (n = 15). Samples from patients with PM are represented by filled circles, and those from DM patients are represented by open circles. b Differential genome-wide transcriptomic profile for the contrast between PM and DM in CD4+ T cells. The fold changes (log₂) are shown on the x-axis, and the p values (−log₁₀) are shown on the y-axis. The genes that are expressed significantly higher in PM are shown as filled circles, and the genes expressed significantly higher in DM are shown as open circles. A false discovery rate threshold of 5% based on the method of Benjamini-Hochberg was used to identify significant differentially expressed genes