Generation of antigen-specific, Foxp3-expressing CD4+ regulatory T cells by inhibition of APC proteosome function

Yingzi Cong, Astrid Konrad, Nuzhat Iqbal, Robin D. Hatton, Casey T. Weaver, Charles O. Elson

Research output: Contribution to journalArticle

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Abstract

We tested the hypothesis that immature APC, whose NF-κB-signaling pathway and thus maturation was blocked by the proteosome inhibitor benzyloxycarbonyl-isoleucyl-glutamyl(O-tert-butyl)-alanyl-leucinal (PSI), could be a source of Ag-specific regulatory T (Treg) cells. DO11.10 CD4+ T cells that were incubated with Ag- and PSI-pulsed APC proliferated poorly, produced less IL-2, IFN-γ, and IL-10 in secondary cultures, and inhibited the response of both naive and memory CD4+ T cells stimulated by Ag-pulsed APC. The generation of PSI-APC Treg cells required IL-10 production by APC. PSI-APC Treg cell inhibition required cell-cell contact but not IL-10 or TGF-β. Addition of IL-2 did not reverse, but Ab to CTLA-4 did reverse partially the inhibitory effect. Depletion of CD25+ T cells before initial culture with PSI-APC did not affect Treg generation. PSI-APC Treg cells expressed high levels of Foxp3, inhibited proliferation of naive DO11.10 T cells in vivo, and abrogated colitis driven by a memory Th1 response to bacterial-associated Ag. We conclude that NF-κB-blocked, immature APC are able to induce the differentiation of Treg cells that can function in vitro and in vivo in an Ag-specific manner.

Original languageEnglish (US)
Pages (from-to)2787-2795
Number of pages9
JournalJournal of Immunology
Volume174
Issue number5
StatePublished - Mar 1 2005
Externally publishedYes

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Regulatory T-Lymphocytes
Antigens
Interleukin-10
T-Lymphocytes
Interleukin-2
Colitis
Inhibition (Psychology)

ASJC Scopus subject areas

  • Immunology

Cite this

Cong, Y., Konrad, A., Iqbal, N., Hatton, R. D., Weaver, C. T., & Elson, C. O. (2005). Generation of antigen-specific, Foxp3-expressing CD4+ regulatory T cells by inhibition of APC proteosome function. Journal of Immunology, 174(5), 2787-2795.

Generation of antigen-specific, Foxp3-expressing CD4+ regulatory T cells by inhibition of APC proteosome function. / Cong, Yingzi; Konrad, Astrid; Iqbal, Nuzhat; Hatton, Robin D.; Weaver, Casey T.; Elson, Charles O.

In: Journal of Immunology, Vol. 174, No. 5, 01.03.2005, p. 2787-2795.

Research output: Contribution to journalArticle

Cong, Y, Konrad, A, Iqbal, N, Hatton, RD, Weaver, CT & Elson, CO 2005, 'Generation of antigen-specific, Foxp3-expressing CD4+ regulatory T cells by inhibition of APC proteosome function', Journal of Immunology, vol. 174, no. 5, pp. 2787-2795.
Cong, Yingzi ; Konrad, Astrid ; Iqbal, Nuzhat ; Hatton, Robin D. ; Weaver, Casey T. ; Elson, Charles O. / Generation of antigen-specific, Foxp3-expressing CD4+ regulatory T cells by inhibition of APC proteosome function. In: Journal of Immunology. 2005 ; Vol. 174, No. 5. pp. 2787-2795.
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