CXCL9 and myeloid sarcoma: A study by Mellergård et al. (2010) suggested there was a marked decline in CSF levels of cytokines and chemokines in MS patients treated with natalizumab, thus concluding chemokines associated with both Th1 (CXCL9, CXCL10, CXCL11) and Th2 (CCL22).