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Enumeration	Reference	Cover	Find
1.	Ermann, Joerg, et al. (author) CD4+CD25+ T cells facilitate the induction of T cell anergy 2001 In: Journal of Immunology. - Rockville Pike, Bethesda, MD : The American Association of Immunologists, Inc.. - 0022-1767 .- 1550-6606. ; 167:8, s. 4271-4275 Journal article (peer-reviewed)abstract T cell anergy is characterized by the inability of the T cell to produce IL-2 and proliferate. It is reversible by the addition of exogenous IL-2. A similar state of unresponsiveness is observed when the proliferative response of murine CD4+CD25- T cells is suppressed in vitro by coactivated CD4+CD25+ T cells. We have developed a suppression system that uses beads coated with anti-CD3 and anti-CD28 Abs as surrogate APCs to study the interaction of CD4+CD25+ and CD4+CD25- T cells in vitro. CD4+CD25+ T cell-induced suppression, in this model, was not abrogated by blocking the B7-CTLA-4 pathway. When the CD4+CD25- T cells were separated from the CD4+CD25+ suppressor cells after 24 h of coactivation by the Ab-coated beads, the CD4+CD25- T cells were unable to proliferate or to produce IL-2 upon restimulation. The induction of this anergic phenotype in the CD4+CD25- T cells correlated with the up-regulated expression of the gene related to anergy in lymphocytes (GRAIL), a novel anergy-related gene that acts as a negative regulator of IL-2 transcription. This system constitutes a novel mechanism of anergy induction in the presence of costimulation.

Ermann, Joerg, et al. (author)
CD4+CD25+ T cells facilitate the induction of T cell anergy
2001
In: Journal of Immunology. - Rockville Pike, Bethesda, MD : The American Association of Immunologists, Inc.. - 0022-1767 .- 1550-6606. ; 167:8, s. 4271-4275
Journal article (peer-reviewed)abstract
- T cell anergy is characterized by the inability of the T cell to produce IL-2 and proliferate. It is reversible by the addition of exogenous IL-2. A similar state of unresponsiveness is observed when the proliferative response of murine CD4+CD25- T cells is suppressed in vitro by coactivated CD4+CD25+ T cells. We have developed a suppression system that uses beads coated with anti-CD3 and anti-CD28 Abs as surrogate APCs to study the interaction of CD4+CD25+ and CD4+CD25- T cells in vitro. CD4+CD25+ T cell-induced suppression, in this model, was not abrogated by blocking the B7-CTLA-4 pathway. When the CD4+CD25- T cells were separated from the CD4+CD25+ suppressor cells after 24 h of coactivation by the Ab-coated beads, the CD4+CD25- T cells were unable to proliferate or to produce IL-2 upon restimulation. The induction of this anergic phenotype in the CD4+CD25- T cells correlated with the up-regulated expression of the gene related to anergy in lymphocytes (GRAIL), a novel anergy-related gene that acts as a negative regulator of IL-2 transcription. This system constitutes a novel mechanism of anergy induction in the presence of costimulation.

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