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Myeloid derived suppressor cells and innate immune system interaction in tumor microenvironment

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LIFE SCIENCES
卷 305, 期 -, 页码 -

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PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.lfs.2022.120755

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Chronic inflammation; Myeloid derived suppressor cells; NK cells; NKT cells; Regulatory T cells; Tumor associated macrophages; Tumor associated neutrophils; Tumor microenvironment (TME); ?? T cells

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The MDSC population in the tumor microenvironment plays a crucial role in tumor immune evasion and cancer progression by disrupting antitumor T cell activity and potentially affecting other immune cell functions.
The tumor microenvironment is a complex domain that not only contains tumor cells but also a plethora of other host immune cells. By nature, the tumor microenvironment is a highly immunosuppressive milieu providing growing conditions for tumor cells. A major immune cell population that contributes most in the development of this immunosuppressive microenvironment is the MDSC, a heterogenous population of immature cells. Although found in small numbers only in the bone marrow of healthy individuals, they readily migrate to the lymph nodes and tumor site during cancer pathogenesis. MDSC mediated disruption of antitumor T cell activity is a major cause of the immunosuppression at the tumor site, but recent findings have shown that MDSC mediated dysfunction of other major immune cells might also play an important role. In this article we will review how crosstalk with MDSC alters the activity of both conventional and unconventional immune cells that inhibits the antitumor immunity and promotes cancer progression.

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