Figure 2. Differential expressions of the S1P1 mRNA between RA patients and healthy controls. The amounts of S1P1 mRNA in the leukocytes were quantified using qRT-PCR. (A) Comparison between the patient group and the control group was examined by Wilcoxon rank sum test with box-and-whisker plot of rank scores. (B) Box-and-whisker plot was used for visualizing distribution of the S1P1 mRNA. These data are the representative of 3 independent experiments. Shown are mean±SEM.

SEM, standard error of the mean.