Flow cytometryVδ2 γδT cells are low in RA blood, but accumulate in joints, and produce high levels IFN-γ and IL-17.ETA restores circulating numbers of Vδ2 cells and decreases the expression of chemotactic receptors CCR5 and CXCR3. This evidence concerns the gene CXCR3 and rheumatoid arthritis.