Finally, in the CCL network, CCL3 and CCL3L3 produced by MG1, MG2, tumor-cell clusters 4 and 6, oligodendrocytes, and MDM5 engaged CCR1 on MG3, while CCL5—expressed exclusively by MDM5—also targeted MG3 (Figure 3J). The gene discussed is CCR1; the disease is neoplasm.