title: T cell dynamics during induction of tolerance and suppression of experimental allergic encephalomyelitis.
abstract: The cell dynamics associated with induction of peripheral T cell tolerance remain largely undefined. In this study, an in vivo model was adapted to two-photon microscopy imaging, and T cell behavior was analyzed on tolerogen-induced modulation. FcγR-deficient (FcγR(-/-)) mice were unable to resist or alleviate experimental allergic encephalomyelitis when treated with Ig-myelin oligodendrocyte glycoprotein (MOG) tolerogen, an Ig carrying the MOG35-55 peptide. However, when FcγR(+/+) dendritic cells (DCs) are adoptively transferred into FcγR(-/-) mice, uptake and presentation of Ig-MOG occurs and the animals were able to overcome experimental allergic encephalomyelitis. We then fluorescently labeled FcγR(+/+) DCs and 2D2 MOG-specific TCR-transgenic T cells, transferred them into FcγR(-/-) mice, administered Ig-MOG, and analyzed both T cell-DC contact events and T cell motility. The results indicate that tolerance takes place in lymphoid organs, and surprisingly, the T cells do not become anergic but instead have a Th2 phenotype. The tolerant Th2 cells displayed reduced motility after tolerogen exposure similar to Th1 cells after immunization. However, the Th2 cells had higher migration speeds and took longer to exhibit changes in motility. Therefore, both Th1 immunity and Th2 tolerance alter T cell migration on Ag recognition, but the kinetics of this effect differ among the subsets.
authors.affiliation: Department of Molecular Microbiology and Immunology, University of Missouri, Columbia, MO 65212, USA.
authors.forename: Rohit D
authors.initials: RD
authors.lastname: Divekar
authors.forename: Cara L
authors.initials: CL
authors.lastname: Haymaker
authors.forename: Jason A
authors.initials: JA
authors.lastname: Cascio
authors.forename: Betul F
authors.initials: BF
authors.lastname: Guloglu
authors.forename: Jason S
authors.initials: JS
authors.lastname: Ellis
authors.forename: Danielle M
authors.initials: DM
authors.lastname: Tartar
authors.forename: Christine M
authors.initials: CM
authors.lastname: Hoeman
authors.forename: Craig L
authors.initials: CL
authors.lastname: Franklin
authors.forename: Bernd H
authors.initials: BH
authors.lastname: Zinselmeyer
authors.forename: Jennifer N
authors.initials: JN
authors.lastname: Lynch
authors.forename: Mark J
authors.initials: MJ
authors.lastname: Miller
authors.forename: Habib
authors.initials: H
authors.lastname: Zaghouani
mesh_terms: D019264:Adoptive Transfer; D000818:Animals; D002469:Cell Separation; D002634:Chemotaxis, Leukocyte / Q000276:immunology; D003713:Dendritic Cells / Q000276:immunology; D004681:Encephalomyelitis, Autoimmune, Experimental / Q000276:immunology* / Q000473:pathology; D007108:Immune Tolerance / Q000276:immunology*; D008213:Lymphocyte Activation / Q000276:immunology; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D008822:Mice, Transgenic; D018992:Myelin-Associated Glycoprotein / Q000276:immunology; D011948:Receptors, Antigen, T-Cell / Q000276:immunology; D016176:T-Lymphocyte Subsets / Q000276:immunology* / Q000378:metabolism / Q000473:pathology
chemical_list: D018992:Myelin-Associated Glycoprotein; D011948:Receptors, Antigen, T-Cell