PMID- 19104504 OWN - NLM STAT- MEDLINE DCOM- 20090511 LR - 20180822 IS - 0818-9641 (Print) IS - 0818-9641 (Linking) VI - 87 IP - 3 DP - 2009 Mar-Apr TI - Type II-activated macrophages suppress the development of experimental autoimmune encephalomyelitis. PG - 235-40 LID - 10.1038/icb.2008.99 [doi] AB - Treatment with immune complexes, which ligate Fcgamma receptors (FcgammaRs), suppresses the development of experimental autoimmune encephalomyelitis (EAE). To determine the mechanism of action, we investigated how these immune complexes affected type II activation of macrophages (that is, exposure to immune complexes in a proinflammatory environment). Our results show that lower doses of interferon-gamma (IFN-gamma) were more effective at priming bone marrow-derived macrophages (BMMphi) to produce more interleukin 10 (IL-10) and less IL-12p40 in response to lipopolysaccharide (LPS) and immune complexes compared with LPS alone. Moreover, at the lowest level of IFN-gamma (20 U ml(-1)), a significant downregulation in the surface expression of CD40, CD80 and PD-L1 was observed in LPS and immune complex-stimulated macrophages (that is, type II activated) than macrophages stimulated with LPS alone (that is, classically activated). Finally, treatment of mice with type II-activated macrophages protected them from developing EAE, suggesting that administration of immune complexes is protective against EAE by inducing type II-activated macrophages. FAU - Tierney, Joanna B AU - Tierney JB AD - School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand. FAU - Kharkrang, Marie AU - Kharkrang M FAU - La Flamme, Anne Camille AU - La Flamme AC LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20081223 PL - United States TA - Immunol Cell Biol JT - Immunology and cell biology JID - 8706300 RN - 0 (Antigen-Antibody Complex) RN - 0 (B7-1 Antigen) RN - 0 (B7-H1 Antigen) RN - 0 (CD40 Antigens) RN - 0 (Cd274 protein, mouse) RN - 0 (Glycoproteins) RN - 0 (Immunologic Factors) RN - 0 (Interleukin-12 Subunit p40) RN - 0 (Lipopolysaccharides) RN - 0 (Membrane Glycoproteins) RN - 0 (Myelin-Oligodendrocyte Glycoprotein) RN - 0 (Peptide Fragments) RN - 0 (Peptides) RN - 0 (Receptors, IgG) RN - 0 (myelin oligodendrocyte glycoprotein (35-50), Ala(37)-) RN - 130068-27-8 (Interleukin-10) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Animals MH - Antigen-Antibody Complex/*administration & dosage MH - B7-1 Antigen/drug effects/immunology/metabolism MH - B7-H1 Antigen MH - CD40 Antigens/antagonists & inhibitors/immunology/metabolism MH - Down-Regulation/drug effects/immunology MH - Encephalomyelitis, Autoimmune, Experimental/immunology/*prevention & control MH - Glycoproteins/pharmacology MH - Immunologic Factors/*administration & dosage MH - Interferon-gamma/pharmacology MH - Interleukin-10/biosynthesis/immunology MH - Interleukin-12 Subunit p40/biosynthesis/immunology MH - Lipopolysaccharides/immunology MH - *Macrophage Activation MH - Macrophages/*drug effects/immunology MH - Membrane Glycoproteins/antagonists & inhibitors/immunology/metabolism MH - Mice MH - Mice, Inbred C57BL MH - Myelin-Oligodendrocyte Glycoprotein MH - Peptide Fragments/pharmacology MH - Peptides/antagonists & inhibitors/immunology/metabolism MH - Receptors, IgG/*immunology EDAT- 2008/12/24 09:00 MHDA- 2009/05/12 09:00 CRDT- 2008/12/24 09:00 PHST- 2008/12/24 09:00 [entrez] PHST- 2008/12/24 09:00 [pubmed] PHST- 2009/05/12 09:00 [medline] AID - icb200899 [pii] AID - 10.1038/icb.2008.99 [doi] PST - ppublish SO - Immunol Cell Biol. 2009 Mar-Apr;87(3):235-40. doi: 10.1038/icb.2008.99. Epub 2008 Dec 23.