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SOCS3 Attenuates Dexamethasone-Induced M2 Polarization by Down-Regulation of GILZ via ROS- and p38 MAPK-Dependent Pathways

  • Hana Jeong (Department of Biological Science, College of Science, Sungkyunkwan University) ;
  • Hyeyoung Yoon (Department of Biological Science, College of Science, Sungkyunkwan University) ;
  • Yerin Lee (Department of Biological Science, College of Science, Sungkyunkwan University) ;
  • Jun Tae Kim (Department of Biological Science, College of Science, Sungkyunkwan University) ;
  • Moses Yang (Department of Biological Science, College of Science, Sungkyunkwan University) ;
  • Gayoung Kim (Department of Biological Science, College of Science, Sungkyunkwan University) ;
  • Bom Jung (Department of Biological Science, College of Science, Sungkyunkwan University) ;
  • Seok Hee Park (Department of Biological Science, College of Science, Sungkyunkwan University) ;
  • Choong-Eun Lee (Department of Biological Science, College of Science, Sungkyunkwan University)
  • Received : 2021.10.20
  • Accepted : 2022.06.02
  • Published : 2022.08.31

Abstract

Suppressors of cytokine signaling (SOCS) have emerged as potential regulators of macrophage function. We have investigated mechanisms of SOCS3 action on type 2 macrophage (M2) differentiation induced by glucocorticoid using human monocytic cell lines and mouse bone marrow-derived macrophages. Treatment of THP1 monocytic cells with dexamethasone (Dex) induced ROS generation and M2 polarization promoting IL-10 and TGF-β production, while suppressing IL-1β, TNF-α and IL-6 production. SOCS3 over-expression reduced, whereas SOCS3 ablation enhanced IL-10 and TGF-β induction with concomitant regulation of ROS. As a mediator of M2 differentiation, glucocorticoid-induced leucine zipper (GILZ) was down-regulated by SOCS3 and up-regulated by shSOCS3. The induction of GILZ and IL-10 by Dex was dependent on ROS and p38 MAPK activity. Importantly, GILZ ablation led to the inhibition of ROS generation and anti-inflammatory cytokine induction by Dex. Moreover, GILZ knock-down negated the up-regulation of IL-10 production induced by shSOCS3 transduction. Our data suggest that SOCS3 targets ROS- and p38-dependent GILZ expression to suppress Dex-induced M2 polarization.

Keywords

Acknowledgement

This study is supported in part by grants # 2015R1A2A2A01003291, # 2015M2B2A9029226, # 2018R1A2B6002201 and 2022R1H1A2003471 from Korea Research Foundation. Hana Jeong is supported in part by the 2017 Global Ph.D. fellowship program.

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