KLF4 and dermatomyositis: In addition, we found high levels of KLF4 mRNA expression with increased circulating Th17 lymphocytes in DM patients, and there was a modest correlation between the percentages of Th17 cells and the expression of KLF4 mRNA in PBMCs from DM patients (r = 0.6000, P = 0.0734) (Figure 1(f)).