1
|
Benedek G, Zhang J, Nguyen H, Kent G, Seifert H, Vandenbark AA, Offner H. Novel feedback loop between M2 macrophages/microglia and regulatory B cells in estrogen-protected EAE mice. J Neuroimmunol 2017; 305:59-67. [PMID: 28284347 DOI: 10.1016/j.jneuroim.2016.12.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 12/21/2016] [Accepted: 12/21/2016] [Indexed: 01/05/2023]
Abstract
Immunoregulatory sex hormones, including estrogen and estriol, may prevent relapses in multiple sclerosis during pregnancy. Our previous studies have demonstrated that regulatory B cells are crucial for estrogen-mediated protection against experimental autoimmune encephalomyelitis (EAE). Herein, we demonstrate an estrogen-dependent induction of alternatively activated (M2) macrophages/microglia that results in an increased frequency of regulatory B cells in the spinal cord of estrogen treated mice with EAE. We further demonstrate that cultured M2-polarized microglia promote the induction of regulatory B cells. Our study suggests that estrogen neuroprotection induces a regulatory feedback loop between M2 macrophages/microglia and regulatory B cells.
Collapse
MESH Headings
- Animals
- Arginase/genetics
- Arginase/metabolism
- B-Lymphocytes, Regulatory/drug effects
- B-Lymphocytes, Regulatory/physiology
- Cells, Cultured
- Coculture Techniques
- Cytokines/genetics
- Cytokines/metabolism
- Disease Models, Animal
- Encephalomyelitis, Autoimmune, Experimental/drug therapy
- Encephalomyelitis, Autoimmune, Experimental/etiology
- Estrogens/therapeutic use
- Female
- Gene Expression Regulation/drug effects
- Interleukin-10/genetics
- Interleukin-10/metabolism
- Macrophages/drug effects
- Macrophages/physiology
- Mice
- Mice, Inbred C57BL
- Mice, Transgenic
- Microglia/drug effects
- Microglia/physiology
- Myelin-Oligodendrocyte Glycoprotein/toxicity
- Nitric Oxide Synthase Type II/genetics
- Nitric Oxide Synthase Type II/metabolism
- Peptide Fragments/toxicity
- Spinal Cord/pathology
- Spleen/pathology
- Time Factors
Collapse
Affiliation(s)
- Gil Benedek
- Neuroimmunology Research, VA Portland Health Care System, 3710 SW U.S. Veterans Hospital Rd., Portland, OR 97239, USA; Department of Neurology, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, USA
| | - Jun Zhang
- Neuroimmunology Research, VA Portland Health Care System, 3710 SW U.S. Veterans Hospital Rd., Portland, OR 97239, USA; Department of Neurology, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, USA
| | - Ha Nguyen
- Neuroimmunology Research, VA Portland Health Care System, 3710 SW U.S. Veterans Hospital Rd., Portland, OR 97239, USA; Department of Neurology, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, USA
| | - Gail Kent
- Neuroimmunology Research, VA Portland Health Care System, 3710 SW U.S. Veterans Hospital Rd., Portland, OR 97239, USA; Department of Neurology, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, USA
| | - Hilary Seifert
- Neuroimmunology Research, VA Portland Health Care System, 3710 SW U.S. Veterans Hospital Rd., Portland, OR 97239, USA; Department of Neurology, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, USA
| | - Arthur A Vandenbark
- Neuroimmunology Research, VA Portland Health Care System, 3710 SW U.S. Veterans Hospital Rd., Portland, OR 97239, USA; Department of Neurology, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, USA; Department of Molecular Microbiology & Immunology, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR, 97239, USA
| | - Halina Offner
- Neuroimmunology Research, VA Portland Health Care System, 3710 SW U.S. Veterans Hospital Rd., Portland, OR 97239, USA; Department of Neurology, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, USA; Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, USA.
| |
Collapse
|