The Journal of Experimental Medicine
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Published 17 May 2004. doi:10.1084/jem.20040249
Rockefeller University Press, 0022-1007 $8.00
JEM, Volume 199, Number 10, 1401-1408
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In Vivo Instruction of Suppressor Commitment in Naive T Cells

Irina Apostolou and Harald von Boehmer

Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115

Address correspondence to Harald von Boehmer, Dana-Farber Cancer Institute, Harvard Medical School, 44 Binney St., Boston, MA 02115. Phone: (617) 632-6882; Fax: (617) 632-6881; email: Harald_von_Boehmer{at}dfci.harvard.edu

The induction of antigen-specific tolerance in the mature immune system of the intact organism has met with limited success. Therefore, nonspecific immunosuppression has been the treatment of choice to prevent unwanted immunity. Here, it is shown that prolonged subcutaneous infusion of low doses of peptide by means of osmotic pumps transforms mature T cells into CD4+25+ suppressor cells that can persist for long periods of time in the absence of antigen and confer specific immunologic tolerance upon challenge with antigen. The described procedure resembles approaches of tolerance induction used decades ago, induces tolerance in the absence of immunity, and holds the promise to become an effective means of inducing antigen-specific tolerance prospectively, whereas its power to suppress already ongoing immune responses remains to be determined.

Key Words: regulatory T cells • Ag-specific tolerance • in vivo induction • subcutaneous infusion • immunity


Abbreviations used in this paper: BrdU, 5-bromodeoxyuridine; CFSE, 5,6-carboxyfluorescein diacetate-succinimidyl ester; INS-HA, rat insulin promoter; Tx, thymectomized.


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