Product Reference
Signal transducer and activator of transcription-3/suppressor of cytokine signaling-3 (STAT3/SOCS3) axis in myeloid cells regulates neuroinflammation.
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| Author |
Hongwei Qin,Wen-I Yeh,Patrizia De Sarno,Andrew T Holdbrooks,Yudong Liu,Michelle T Muldowney,Stephanie L Reynolds,Lora L Yanagisawa,Thomas H Fox,Keun Park,Laurie E Harrington,Chander Raman,Etty N Benveniste |
| Citation Information |
Proceedings of the National Academy of Sciences of the United States of America, 109: (2012) |
| Keywords |
Animals,Cell Count,Cell Polarity,Cytoprotection,Encephalomyelitis, Autoimmune, Experimental,Gene Deletion,Inflammation,Integrases,Macrophages,Mice,Mice, Inbred C57BL,Myelin Proteins,Myeloid Cells,Nervous System,Neurons,Phenotype,Signal Transduction,STAT3 Transcription Factor,Suppressor of Cytokine Signaling Proteins,Th1 Cells,Th17 Cells |
| Related Products |
MPXMCYTO-70K |
| Pub Med ID |
22411837 |
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Abstract
Suppressor of cytokine signaling (SOCS) proteins are feedback inhibitors of the JAK/STAT pathway. SOCS3 has a crucial role in inhibiting STAT3 activation, cytokine signaling, and inflammatory gene expression in macrophages/microglia. To determine the role of SOCS3 in myeloid cells in neuroinflammation, mice with conditional SOCS3 deletion in myeloid cells (LysMCre-SOCS3(fl/fl)) were tested for experimental autoimmune encephalomyelitis (EAE). The myeloid-specific SOCS3-deficient mice are vulnerable to myelin oligodendrocyte glycoprotein (MOG)-induced EAE, with a severe, nonresolving atypical form of disease. In vivo, enhanced infiltration of inflammatory cells and demyelination is prominent in the cerebellum of myeloid-specific SOCS3-deficient mice, as is enhanced STAT3 signaling and expression of inflammatory cytokines/chemokines and an immune response dominated by Th1 and Th17 cells. In vitro, SOCS3-deficient macrophages exhibit heightened STAT3 activation and are polarized toward the classical M1 phenotype. SOCS3-deficient M1 macrophages provide the microenvironment to polarize Th1 and Th17 cells and induce neuronal death. Furthermore, adoptive transfer of M2 macrophages into myeloid SOCS3-deficient mice leads to delayed onset and reduced severity of atypical EAE by decreasing STAT3 activation, Th1/Th17 cells, and proinflammatory mediators in the cerebellum. These findings indicate that myeloid cell SOCS3 provides protection from EAE through deactivation of neuroinflammatory responses.
