Moreover, CCL3 synergistically enhanced FcεRI-mediated degranulation and the production of CCL2, which is a chemoattractant for T cells and eosinophils in bone marrow-derived murine mast cells and the rat basophilic leukemia 2H3 cell line [33, 35–39]. The gene discussed is CCL3; the disease is acute basophilic leukemia.