PMID- 22539788 OWN - NLM STAT- MEDLINE DCOM- 20120814 LR - 20171116 IS - 1550-6606 (Electronic) IS - 0022-1767 (Linking) VI - 188 IP - 11 DP - 2012 Jun 1 TI - Dendritic cell-specific ablation of the protein tyrosine phosphatase Shp1 promotes Th1 cell differentiation and induces autoimmunity. PG - 5397-407 LID - 10.4049/jimmunol.1103210 [doi] AB - Dendritic cells (DCs) promote immune responses to foreign Ags and immune tolerance to self-Ags. Deregulation of DCs is implicated in autoimmunity, but the molecules that regulate DCs to protect against autoimmunity have remained unknown. In this study, we show that mice lacking the protein tyrosine phosphatase Shp1 specifically in DCs develop splenomegaly associated with more CD11c(+) DCs. Splenic DCs from the mutant mice showed upregulation of CD86 and CCR7 expression and of LPS-induced production of proinflammatory cytokines. The mice manifested more splenic Th1 cells, consistent with the increased ability of their DCs to induce production of IFN-gamma by Ag-specific T cells in vitro. The number of splenic CD5(+)CD19(+) B-1a cells and the serum concentrations of Igs M and G2a were also increased in the mutant mice. Moreover, aged mutant mice developed glomerulonephritis and interstitial pneumonitis together with increased serum concentrations of autoantibodies. Shp1 is thus a key regulator of DC functions that protects against autoimmunity. FAU - Kaneko, Tetsuya AU - Kaneko T AD - Laboratory of Biosignal Sciences, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Gunma 371-8512, Japan. FAU - Saito, Yasuyuki AU - Saito Y FAU - Kotani, Takenori AU - Kotani T FAU - Okazawa, Hideki AU - Okazawa H FAU - Iwamura, Hiroko AU - Iwamura H FAU - Sato-Hashimoto, Miho AU - Sato-Hashimoto M FAU - Kanazawa, Yoshitake AU - Kanazawa Y FAU - Takahashi, Satoshi AU - Takahashi S FAU - Hiromura, Keiju AU - Hiromura K FAU - Kusakari, Shinya AU - Kusakari S FAU - Kaneko, Yoriaki AU - Kaneko Y FAU - Murata, Yoji AU - Murata Y FAU - Ohnishi, Hiroshi AU - Ohnishi H FAU - Nojima, Yoshihisa AU - Nojima Y FAU - Takagishi, Kenji AU - Takagishi K FAU - Matozaki, Takashi AU - Matozaki T LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20120425 PL - United States TA - J Immunol JT - Journal of immunology (Baltimore, Md. : 1950) JID - 2985117R RN - 0 (Autoantibodies) RN - 0 (CD11c Antigen) RN - EC 3.1.3.48 (Protein Tyrosine Phosphatase, Non-Receptor Type 6) RN - EC 3.1.3.48 (Ptpn6 protein, mouse) SB - IM MH - Animals MH - Autoantibodies/biosynthesis MH - Autoimmune Diseases/*genetics/immunology/pathology MH - CD11c Antigen/biosynthesis MH - Cell Differentiation/genetics/*immunology MH - Dendritic Cells/*enzymology/*immunology MH - Mice MH - Mice, Knockout MH - Mice, Transgenic MH - Protein Tyrosine Phosphatase, Non-Receptor Type 6/*deficiency/*genetics/physiology MH - Splenomegaly/genetics/immunology/pathology MH - Th1 Cells/cytology/*immunology MH - Up-Regulation/genetics/immunology EDAT- 2012/04/28 06:00 MHDA- 2012/08/15 06:00 CRDT- 2012/04/28 06:00 PHST- 2012/04/28 06:00 [entrez] PHST- 2012/04/28 06:00 [pubmed] PHST- 2012/08/15 06:00 [medline] AID - jimmunol.1103210 [pii] AID - 10.4049/jimmunol.1103210 [doi] PST - ppublish SO - J Immunol. 2012 Jun 1;188(11):5397-407. doi: 10.4049/jimmunol.1103210. Epub 2012 Apr 25.