Tumor-infiltrating myeloid-derived suppressor cells (MDSC) are a heterogeneous and immunosuppressive cell subset that blocks the proliferation and the activity of both T and natural killer (NK) cells and promotes tumor vasculogenesis and progression. Recent evidences demonstrate that the recruitment of MDSCs in tumors also blocks senescence induced by chemotherapy promoting chemoresistance. Hen...

Tumor-infiltrating myeloid-derived suppressor cells (MDSC) are a heterogeneous and immunosuppressive cell subset that blocks the proliferation and the activity of both T and natural killer (NK) cells and promotes tumor vasculogenesis and progression. Recent evidences demonstrate that the recruitment of MDSCs in tumors also blocks senescence induced by chemotherapy promoting chemoresistance. Hen...

Authors Affiliations: Division of Clinical Pharmacology and Center of Integrated Protein Science Munich, Munich, Germany Financial support: This work was supported by grants from the LMUexcellent research professorship (to S.E.), the German Research Foundation: DFG En 169/7-2 and Graduiertenkolleg 1202 (to C.B. and S.E.), the excellence cluster Center for Integrated Protein Science Munich 114 (...

The percentage of circulating CD14+CD11b+HLA-DR-/low myeloid-derived suppressor cells (MDSCs) inversely correlates with survival among advanced melanoma patients. High levels of MDSCs are associated with the absence of T lymphocytes specific for melanoma-derived antigens, implying a causal and clinically relevant interaction between these cell subsets. MDSCs might therefore represent prognostic...

Myeloid derived suppressor cells (MDSCa) are a heterogeneous population of cells that promote an immunosuppressive environment in tumor-bearing hosts. Recently, B7-H1 signaling has been reported to be critical for the maintainancer of regulatory T cells (Tregs), another immunosuppressive cell population. Here, we discuss the immunosuppressive function of B7-H1 on MDSCs, and the functional cross...

CXCR2 is an essential regulator of neutrophil recruitment to inflamed and damaged sites and plays prominent roles in inflammatory pathologies and cancer. It has therefore been highlighted as an important therapeutic target. However the success of the therapeutic targeting of CXCR2 is threatened by our relative lack of knowledge of its precise in vivo mode of action. Here we demonstrate that CXC...

Myeloid-derived suppressor cells (MDSCs) promote tumor growth and metastasis. We have recently demonstrated that the pro-inflammatory cytokine macrophage migration inhibitory factor (MIF) enhances the immunosuppressive microenvironment by increasing the abundance of monocytic MDSCs within the tumor. Our results suggest that MIF is a potential therapeutic target for the prevention of metastasis ...

The immunosuppressive tumor microenvironment represents not only one of the key factors stimulating tumor progression but also a strong obstacle for efficient tumor immunotherapy. Immunosuppression was found to be associated with chronic inflammatory mediators including cytokines, chemokines and growth factors produced by cancer and stroma cells. Long-term intensive production of these factors ...