title: gammadelta T cells express activation markers in the central nervous system of mice with chronic-relapsing experimental autoimmune encephalomyelitis.
abstract: In this study, we assessed the expression of activation markers on gammadelta T cells in central nervous system (CNS) lesions of SJL mice adoptively sensitized to develop experimental autoimmune encephalomyelitis (EAE) using myelin basic protein-reactive T cells. Although disease expression is known to be dependent upon T cells that express the alphabeta T cell receptor (TCR), a role for gammadelta T cells has been implicated in some studies but not in others. Using three-color flow cytometric analysis of both total and gammadelta T cells in spleen and CNS, the data showed that expression of CD69 (early activation marker), CD62L (lymphocyte homing receptor), CD25 (IL-2Ralpha), CD122 (IL-2Rbeta) and CD95/CD95L (Fas/FasL), fluctuated on gammadelta T cells in EAE lesions in a disease-related fashion. Furthermore, the pattern of expression for these markers on gammadelta T cells was distinct from that found on the total lymphocyte population. Cytokine analysis of gammadelta T cells in the CNS demonstrated a bias towards a Th1-like cytokine profile. From these data, we conclude that gammadelta T cells in EAE lesions display an activated phenotype and form a dynamic component of the total lymphocyte population in the CNS, supporting a contributory role for these cells.
authors.affiliation: Department of Pathology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, New York 10461, USA.
authors.forename: Y L
authors.initials: YL
authors.lastname: Gao
authors.forename: A J
authors.initials: AJ
authors.lastname: Rajan
authors.forename: C S
authors.initials: CS
authors.lastname: Raine
authors.forename: C F
authors.initials: CF
authors.lastname: Brosnan
mesh_terms: D000818:Animals; D015703:Antigens, CD / Q000502:physiology; D000945:Antigens, Differentiation, T-Lymphocyte / Q000502:physiology; D015415:Biomarkers; D016827:CD8 Antigens / Q000502:physiology; D002490:Central Nervous System / Q000276:immunology* / Q000473:pathology; D002908:Chronic Disease; D004681:Encephalomyelitis, Autoimmune, Experimental / Q000276:immunology*; D005260:Female; D016130:Immunophenotyping; D019041:L-Selectin / Q000502:physiology; D037181:Lectins, C-Type; D008213:Lymphocyte Activation / Q000276:immunology*; D051379:Mice; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000276:immunology; D015375:Receptors, Interleukin-2 / Q000502:physiology; D012008:Recurrence; D013154:Spleen / Q000502:physiology; D016176:T-Lymphocyte Subsets / Q000276:immunology*; D019014:fas Receptor / Q000502:physiology; D000099192:CD69 Antigens
chemical_list: D015703:Antigens, CD; D000945:Antigens, Differentiation, T-Lymphocyte; D015415:Biomarkers; D016827:CD8 Antigens; D019041:L-Selectin; D037181:Lectins, C-Type; D016692:Receptors, Antigen, T-Cell, gamma-delta; D015375:Receptors, Interleukin-2; D019014:fas Receptor; D000099192:CD69 Antigens