Blog
About

2
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      The Generation and Identity of Human Myeloid-Derived Suppressor Cells

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Myeloid-derived suppressor cells (MDSCs) are cells of myeloid lineage with a potent immunosuppressive capacity. They are present in cancer patients as well as in patients with severe inflammatory conditions and infections. MDSCs exist as two main subtypes, the granulocytic (G-MDSCs) and the monocytic (Mo-MDSCs) type, as defined by their surface phenotype and functions. While the functions of MDSCs have been investigated in depth, the origin of human MDSCs is less characterized and even controversial. In this review, we recapitulate theories on how MDSCs are generated in mice, and whether this knowledge is translatable into human MDSC biology, as well as on problems of defining MDSCs by their immature cell surface phenotype in relation to the plasticity of myeloid cells. Finally, the challenge of pharmacological targeting of MDSCs in the future is envisioned.

          Related collections

          Most cited references 116

          • Record: found
          • Abstract: found
          • Article: not found

          Polarization of tumor-associated neutrophil phenotype by TGF-beta: "N1" versus "N2" TAN.

          TGF-beta blockade significantly slows tumor growth through many mechanisms, including activation of CD8(+) T cells and macrophages. Here, we show that TGF-beta blockade also increases neutrophil-attracting chemokines, resulting in an influx of CD11b(+)/Ly6G(+) tumor-associated neutrophils (TANs) that are hypersegmented, more cytotoxic to tumor cells, and express higher levels of proinflammatory cytokines. Accordingly, following TGF-beta blockade, depletion of these neutrophils significantly blunts antitumor effects of treatment and reduces CD8(+) T cell activation. In contrast, in control tumors, neutrophil depletion decreases tumor growth and results in more activated CD8(+) T cells intratumorally. Together, these data suggest that TGF-beta within the tumor microenvironment induces a population of TAN with a protumor phenotype. TGF-beta blockade results in the recruitment and activation of TANs with an antitumor phenotype.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Bone marrow stromal cells attenuate sepsis via prostaglandin E(2)-dependent reprogramming of host macrophages to increase their interleukin-10 production.

            Sepsis causes over 200,000 deaths yearly in the US; better treatments are urgently needed. Administering bone marrow stromal cells (BMSCs -- also known as mesenchymal stem cells) to mice before or shortly after inducing sepsis by cecal ligation and puncture reduced mortality and improved organ function. The beneficial effect of BMSCs was eliminated by macrophage depletion or pretreatment with antibodies specific for interleukin-10 (IL-10) or IL-10 receptor. Monocytes and/or macrophages from septic lungs made more IL-10 when prepared from mice treated with BMSCs versus untreated mice. Lipopolysaccharide (LPS)-stimulated macrophages produced more IL-10 when cultured with BMSCs, but this effect was eliminated if the BMSCs lacked the genes encoding Toll-like receptor 4, myeloid differentiation primary response gene-88, tumor necrosis factor (TNF) receptor-1a or cyclooxygenase-2. Our results suggest that BMSCs (activated by LPS or TNF-alpha) reprogram macrophages by releasing prostaglandin E(2) that acts on the macrophages through the prostaglandin EP2 and EP4 receptors. Because BMSCs have been successfully given to humans and can easily be cultured and might be used without human leukocyte antigen matching, we suggest that cultured, banked human BMSCs may be effective in treating sepsis in high-risk patient groups.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: found
              Is Open Access

              Recommendations for myeloid-derived suppressor cell nomenclature and characterization standards

              Myeloid-derived suppressor cells (MDSC) are a heterogeneous population expanded in cancer and other chronic inflammatory conditions. Here the authors identify the challenges and propose a set of minimal reporting guidelines for mouse and human MDSC.
                Bookmark

                Author and article information

                Contributors
                Journal
                Front Oncol
                Front Oncol
                Front. Oncol.
                Frontiers in Oncology
                Frontiers Media S.A.
                2234-943X
                07 February 2020
                2020
                : 10
                Affiliations
                1Department of Translational Medicine, Division of Experimental Infection Medicine, Lund University , Malmö, Sweden
                2Department of Translational Medicine, Cancer Immunology, Lund University, Skåne University Hospital , Malmö, Sweden
                Author notes

                Edited by: George S. Karagiannis, Albert Einstein College of Medicine, United States

                Reviewed by: Sven Brandau, University of Duisburg-Essen, Germany; Panayotis Verginis, Biomedical Research Foundation of the Academy of Athens, Greece

                *Correspondence: Karin Leandersson karin.leandersson@ 123456med.lu.se

                This article was submitted to Molecular and Cellular Oncology, a section of the journal Frontiers in Oncology

                Article
                10.3389/fonc.2020.00109
                7025543
                Copyright © 2020 Bergenfelz and Leandersson.

                This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

                Page count
                Figures: 5, Tables: 2, Equations: 0, References: 116, Pages: 12, Words: 8079
                Funding
                Funded by: Vetenskapsrådet 10.13039/501100004359
                Funded by: Cancerfonden 10.13039/501100002794
                Funded by: Svenska Sällskapet för Medicinsk Forskning 10.13039/501100003748
                Categories
                Oncology
                Review

                Comments

                Comment on this article