We first compared concentrations of selected chemokines in the sera of patients in MS relapse with their concentrations in the sera of control subjects, and detected significantly lower concentrations of CXCL10 and CXCL8 in RRMS patients (CXCL10, 76.49 [40.17–128.90] pg/mL; CXCL8, 50.16 [34.25–86.61] pg/mL) in comparison to controls (CXCL10, 171.40 [138.31–249.79] pg/mL; CXCL8, 64.02 [47.05–242.34] pg/mL; p < 0.001; p = 0.026, respectively, Mann–Whitney test, Figure 1A,B). This evidence concerns the gene CXCL10 and relapsing-remitting multiple sclerosis.