CSF2 and breast cancer: The ratio of the GM-CSF-induced mMDSCs and gMDSCs out from the bone marrow culture was similar to the ratio of them in the bone marrow and spleen of tumor-bearing mice in our study (Figure 1d) and in other breast cancer mouse model.22 FACSorted GM-CSF-induced gMDSCs and mMDSCs and bone marrow monocytes and neutrophils from Balb/c mice were then examined for their mRNA expression levels of glycolytic genes.