(A–C) Proportion and absolute number of BM CD11b+Gr1+ cells (A), indicated populations of myeloid cells (B), or lymphocytes (C) in CD11b-DTR-chimeras 48h after DT injection (n=3). (D) DP42 tumors were established in CD11b-DTR chimeras. Treatment with doxorubicin (dox, Pfizer, i.v., 4 mg/kg every 4 days) started 10 days after tumor cell inoculation (n=11–14 per group). Survival of mice was determined. ** - p<0.005; and *** - p< 0.001.