CD274 and serum lipopolysaccharide activity: After splenectomy, IL-10 was decreased, and hyperglycemia as well as insulin resistance was exacerbated, and the effect of ADSCs was attenuated.28In endotoxemia, spleen-derived interferon (IFN)-γ induced the generation of suppressive neutrophils, splenectomy nullified circulating IFN-γ level and reduced the percentage of PD-L1+neutrophils, ameliorated immune response.29In our current study, spleen-derived CCL9 also played important role in tumor-promoting effect via attracting MDSCs to tumor tissue.