EAE mediated by a non-IFN-γ/non-IL-17 pathway.
Previous studies have shown that EAE can be elicited by the adoptive transfer of either IFN-γ-producing (Th1) or IL-17-producing (Th17) myelin-specific CD4(+) T-cell lines. Paradoxically, mice deficient in either IFN-γ or IL-17 remain susceptible to EAE following immunization with myelin antigens in CFA. These observations raise questions about the redundancy of IFN-γ and IL-17 in autoimmune demyelinating disease mediated by a diverse, polyclonal population of autoreactive T cells. In this study, we show that an atypical form of EAE, induced in C57BL/6 mice by the adoptive transfer of IFN-γ-deficient effector T cells, required IL-17 signaling for the development of brainstem infiltrates. In contrast, classical EAE, characterized by predominant spinal cord inflammation, occurred in the combined absence of IFN-γ and IL-17 signaling, but was dependent on GM-CSF and CXCR2. Our findings contribute to a growing body of data, indicating that individual cytokines vary in their importance across different models of CNS autoimmunity.
Holtom-Garrett Program in Neuroimmunology, Department of Neurology, University of Michigan, Ann Arbor, MI, USA.
Mark A
MA
Kroenke
Stephen W
SW
Chensue
Benjamin M
BM
Segal
D019264:Adoptive Transfer; D000818:Animals; D001933:Brain Stem / Q000276:immunology* / Q000473:pathology; D002478:Cells, Cultured; D004681:Encephalomyelitis, Autoimmune, Experimental / Q000235:genetics / Q000276:immunology* / Q000473:pathology / Q000503:physiopathology; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000378:metabolism; D007114:Immunization; D007371:Interferon-gamma / Q000235:genetics*; D020381:Interleukin-17 / Q000235:genetics / Q000276:immunology / Q000378:metabolism*; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D009185:Myelin Proteins; D018992:Myelin-Associated Glycoprotein / Q000276:immunology / Q000378:metabolism; D063308:Myelin-Oligodendrocyte Glycoprotein; D010446:Peptide Fragments / Q000276:immunology / Q000378:metabolism; D023063:Receptors, Interleukin-8B / Q000378:metabolism; D015398:Signal Transduction / Q000235:genetics / Q000276:immunology; D013116:Spinal Cord / Q000276:immunology / Q000473:pathology; D013601:T-Lymphocytes / Q000276:immunology / Q000378:metabolism* / Q000473:pathology / Q000637:transplantation
D020381:Interleukin-17; C571327:Mog protein, mouse; D009185:Myelin Proteins; D018992:Myelin-Associated Glycoprotein; D063308:Myelin-Oligodendrocyte Glycoprotein; D010446:Peptide Fragments; D023063:Receptors, Interleukin-8B; D007371:Interferon-gamma; D016178:Granulocyte-Macrophage Colony-Stimulating Factor