PMID- 26967393 OWN - NLM STAT- MEDLINE DCOM- 20180124 LR - 20221202 IS - 1949-2553 (Electronic) IS - 1949-2553 (Linking) VI - 7 IP - 15 DP - 2016 Apr 12 TI - Loss of SOCS3 in myeloid cells prolongs survival in a syngeneic model of glioma. PG - 20621-35 LID - 10.18632/oncotarget.7992 [doi] AB - In glioma, microglia and macrophages are the largest population of tumor-infiltrating cells, referred to as glioma associated macrophages (GAMs). Herein, we sought to determine the role of Suppressor of Cytokine Signaling 3 (SOCS3), a negative regulator of Signal Transducer and Activator of Transcription 3 (STAT3), in GAM functionality in glioma. We utilized a conditional model in which SOCS3 deletion is restricted to the myeloid cell population. We found that SOCS3-deficient bone marrow-derived macrophages display enhanced and prolonged expression of pro-inflammatory M1 cytokines when exposed to glioma tumor cell conditioned medium in vitro. Moreover, we found that deletion of SOCS3 in the myeloid cell population delays intracranial tumor growth and increases survival of mice bearing orthotopic glioma tumors in vivo. Although intracranial tumors from mice with SOCS3-deficient myeloid cells appear histologically similar to control mice, we observed that loss of SOCS3 in myeloid cells results in decreased M2 polarized macrophage infiltration in the tumors. Furthermore, loss of SOCS3 in myeloid cells results in increased CD8+ T-cell and decreased regulatory T-cell infiltration in the tumors. These findings demonstrate a beneficial effect of M1 polarized macrophages on suppressing glioma tumor growth, and highlight the importance of immune cells in the tumor microenvironment. FAU - McFarland, Braden C AU - McFarland BC AD - Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, USA. FAU - Marks, Margaret P AU - Marks MP AD - Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, USA. FAU - Rowse, Amber L AU - Rowse AL AD - Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, USA. FAU - Fehling, Samuel C AU - Fehling SC AD - Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, USA. FAU - Gerigk, Magda AU - Gerigk M AD - Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, USA. FAU - Qin, Hongwei AU - Qin H AD - Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, USA. FAU - Benveniste, Etty N AU - Benveniste EN AD - Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, USA. LA - eng GR - P30 NS047466/NS/NINDS NIH HHS/United States GR - R01 CA158534/CA/NCI NIH HHS/United States GR - P30 AR048311/AR/NIAMS NIH HHS/United States GR - R25 CA076023/CA/NCI NIH HHS/United States GR - R01 NS057563/NS/NINDS NIH HHS/United States GR - R01 CA194414/CA/NCI NIH HHS/United States GR - P01 CA071933/CA/NCI NIH HHS/United States GR - T32 NS048039/NS/NINDS NIH HHS/United States GR - P30 CA013148/CA/NCI NIH HHS/United States PT - Journal Article PL - United States TA - Oncotarget JT - Oncotarget JID - 101532965 RN - 0 (Socs3 protein, mouse) RN - 0 (Suppressor of Cytokine Signaling 3 Protein) SB - IM MH - Animals MH - Apoptosis MH - Brain Neoplasms/genetics/immunology/*pathology MH - Cell Proliferation MH - Glioma/genetics/immunology/*pathology MH - Mice MH - Mice, Knockout MH - Myeloid Cells/immunology/metabolism/*pathology MH - Suppressor of Cytokine Signaling 3 Protein/*physiology MH - T-Lymphocytes, Regulatory/immunology/metabolism/*pathology MH - Tumor Cells, Cultured MH - Tumor Microenvironment/immunology PMC - PMC4991480 OTO - NOTNLM OT - GL261 OT - JAK/STAT OT - SOCS3 OT - glioblastoma OT - macrophage COIS- CONFLICTS OF INTEREST The authors declare no financial or competing conflicts of interests. EDAT- 2016/03/12 06:00 MHDA- 2018/01/25 06:00 PMCR- 2016/04/12 CRDT- 2016/03/12 06:00 PHST- 2016/09/14 00:00 [received] PHST- 2016/02/16 00:00 [accepted] PHST- 2016/03/12 06:00 [entrez] PHST- 2016/03/12 06:00 [pubmed] PHST- 2018/01/25 06:00 [medline] PHST- 2016/04/12 00:00 [pmc-release] AID - 7992 [pii] AID - 10.18632/oncotarget.7992 [doi] PST - ppublish SO - Oncotarget. 2016 Apr 12;7(15):20621-35. doi: 10.18632/oncotarget.7992.