PMID- 20035831 OWN - NLM STAT- MEDLINE DCOM- 20100406 LR - 20100201 IS - 1872-7972 (Electronic) IS - 0304-3940 (Linking) VI - 470 IP - 1 DP - 2010 Feb 5 TI - TNF-alpha receptor 1 deficiency reduces antigen-presenting capacity of Schwann cells and ameliorates experimental autoimmune neuritis in mice. PG - 19-23 LID - 10.1016/j.neulet.2009.12.045 [doi] AB - Tumor necrosis factor-alpha (TNF-alpha) is a pleiotropic pro-inflammatory cytokine with potentially neurodestructive effects and plays a pivotal role in autoimmune demyelinating disease. To address the role of TNF-alpha in the pathogenesis of experimental autoimmune neuritis (EAN), the current study investigated the antigen-presenting capacity of Schwann cells (SCs) in EAN induced by P0 protein peptide 106-125 in TNF-alpha receptor 1 deficient (TNFR1(-/-)) mice. The antigen-presenting capacity of SCs was assessed by the expression of MHC class II (MHCII), CD40, CD80 and CD86 molecules on activated SCs as well as by induction of T cell proliferation in co-cultures of P0 protein peptide 106-125 specific T cells with activated SCs. In addition, the expression of inducible nitric oxide synthase (iNOS) was measured in activated SCs by flow cytometry. TNFR1(-/-) EAN mice developed significantly delayed and reduced clinical signs of EAN compared to wild type EAN mice. In parallel, the expression of MHCII, CD80 and iNOS on SCs were decreased in TNFR1(-/-) mice compared to wild type mice. Likewise, proliferation of P0 protein peptide 106-125 specific T cells simulated by activated SCs of TNFR1(-/-) EAN mice was lower than that of wild type EAN mice. Our data suggest that TNF-alpha may exert pro-inflammatory effects in EAN via TNFR1 by up-regulating the antigen-presenting function and iNOS production of SCs. CI - (c) 2009 Elsevier Ireland Ltd. All rights reserved. FAU - Mao, Xi-Jing AU - Mao XJ AD - Department of Neurology, First Hospital of Jilin University, Changchun, China. FAU - Zhang, Xing-Mei AU - Zhang XM FAU - Zhang, Hong-Liang AU - Zhang HL FAU - Quezada, Hernan Concha AU - Quezada HC FAU - Mix, Eilhard AU - Mix E FAU - Yang, Xin AU - Yang X FAU - Winblad, Bengt AU - Winblad B FAU - Adem, Abdu AU - Adem A FAU - Zhu, Jie AU - Zhu J LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20091224 PL - Ireland TA - Neurosci Lett JT - Neuroscience letters JID - 7600130 RN - 0 (Antigens) RN - 0 (Myelin P0 Protein) RN - 0 (Receptors, Tumor Necrosis Factor, Type I) RN - 0 (Tnfrsf1a protein, mouse) RN - 0 (Tumor Necrosis Factor-alpha) RN - EC 1.14.13.39 (Nitric Oxide Synthase Type II) SB - IM MH - Animals MH - Antigens/*metabolism MH - Cell Proliferation MH - Cells, Cultured MH - Coculture Techniques MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Myelin P0 Protein/metabolism MH - Neuritis, Autoimmune, Experimental/*metabolism MH - Nitric Oxide Synthase Type II/metabolism MH - Receptors, Tumor Necrosis Factor, Type I/deficiency/genetics/*metabolism MH - Schwann Cells/enzymology/*metabolism MH - T-Lymphocytes/physiology MH - Tumor Necrosis Factor-alpha/metabolism EDAT- 2009/12/29 06:00 MHDA- 2010/04/07 06:00 CRDT- 2009/12/29 06:00 PHST- 2009/10/07 00:00 [received] PHST- 2009/12/03 00:00 [revised] PHST- 2009/12/18 00:00 [accepted] PHST- 2009/12/29 06:00 [entrez] PHST- 2009/12/29 06:00 [pubmed] PHST- 2010/04/07 06:00 [medline] AID - S0304-3940(09)01627-9 [pii] AID - 10.1016/j.neulet.2009.12.045 [doi] PST - ppublish SO - Neurosci Lett. 2010 Feb 5;470(1):19-23. doi: 10.1016/j.neulet.2009.12.045. Epub 2009 Dec 24.