Since CD1c+ DCs of RA patients had high expression levels of miR-34a, we next investigated the mRNA expression of AXL in these CD1c+ cells and found reduced AXL expression in two RA cohorts (Fig. 6c,d) that correlated negatively with the expression of miR-34a (r=−0.463; P=0.04; Pearson correlation coefficient). Here, CD1C is linked to rheumatoid arthritis.