title: Expression of 3G11 epitope defines subpopulations of regulatory T cells with different suppressive potency.
abstract: 3G11, a sialylated carbohydrate epitope on the disialoganglioside molecule, is expressed predominantly on the surface of mouse CD4(+) T cells. Our previous studies suggested that lack of the 3G11 molecule could be a new cell surface marker for regulatory CD4(+) T cells. In the present study, we explore the relationship between 3G11(-) and CD25(+) T cells, a well-defined, naturally occurring regulatory T cell population. We found that a large proportion of CD25(+)CD4(+) T cells lack expression of 3G11 and that more 3G11(-)CD4(+) T cells express Foxp3 compared to the 3G11(+)CD4(+) population. Based on 3G11 and CD25 expression we sorted four CD4(+) T cell subpopulations and tested their phenotypes. Among four CD25/3G11-related CD4(+) T cell subpopulations, CD25(+)3G11(-) T cells expressed the highest levels of Foxp3 and IL-10 and most efficiently inhibited mitogenic and antigen-specific immune responses in vitro and clinical EAE in vivo, while CD25(-)3G11(+) T cells produced a higher level of proinflammatory cytokines and enhanced autoimmune responses. Thus, among CD4(+)CD25(+) T cells, CD25(+)3G11(-) T cells represent a more effective Treg subpopulation than CD25(+)3G11(+) T cells.
authors.affiliation: Department of Neurology, Thomas Jefferson University, Philadelphia, USA.
authors.forename: Zhao
authors.initials: Z
authors.lastname: Zhao
authors.forename: Bogoljub
authors.initials: B
authors.lastname: Ciric
authors.forename: Shuo
authors.initials: S
authors.lastname: Yu
authors.forename: Hongmei
authors.initials: H
authors.lastname: Li
authors.forename: Jingxian
authors.initials: J
authors.lastname: Yang
authors.forename: Malek
authors.initials: M
authors.lastname: Kamoun
authors.forename: Guang-Xian
authors.initials: GX
authors.lastname: Zhang
authors.forename: Abdolmohamad
authors.initials: A
authors.lastname: Rostami
mesh_terms: D000818:Animals; D015703:Antigens, CD / Q000378:metabolism; D000954:Antigens, Surface / Q000235:genetics / Q000378:metabolism*; D049109:Cell Proliferation; D018920:Coculture Techniques / Q000379:methods; D016207:Cytokines / Q000378:metabolism; D004195:Disease Models, Animal; D004681:Encephalomyelitis, Autoimmune, Experimental / Q000139:chemically induced / Q000276:immunology / Q000473:pathology*; D000939:Epitopes / Q000235:genetics / Q000378:metabolism*; D005260:Female; D005434:Flow Cytometry / Q000379:methods; D005452:Fluoresceins / Q000378:metabolism; D051858:Forkhead Transcription Factors / Q000378:metabolism; D005786:Gene Expression Regulation / Q000235:genetics / Q000502:physiology*; D006023:Glycoproteins / Q000009:adverse effects; D051379:Mice; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D063308:Myelin-Oligodendrocyte Glycoprotein; D010446:Peptide Fragments / Q000009:adverse effects; D011948:Receptors, Antigen, T-Cell / Q000235:genetics; D018709:Statistics, Nonparametric; D013388:Succinimides / Q000378:metabolism; D050378:T-Lymphocytes, Regulatory / Q000145:classification / Q000378:metabolism*
chemical_list: C087165:5-(6)-carboxyfluorescein diacetate succinimidyl ester; D015703:Antigens, CD; D000954:Antigens, Surface; D016207:Cytokines; D000939:Epitopes; D005452:Fluoresceins; D051858:Forkhead Transcription Factors; C498833:Foxp3 protein, mouse; D006023:Glycoproteins; D063308:Myelin-Oligodendrocyte Glycoprotein; D010446:Peptide Fragments; D011948:Receptors, Antigen, T-Cell; D013388:Succinimides; C509654:antigen 3G11, mouse; C445081:myelin oligodendrocyte glycoprotein (35-55)