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J Immunol. 2005 Oct 1;175(7):4180-3.

Cutting edge: direct suppression of B cells by CD4+ CD25+ regulatory T cells.

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1
Laboratory of Immunology and Hematopoiesis, Department of Pathobiology, Purdue University, West Lafayette, IN 47907, USA.

Abstract

Regulatory T cells (Tregs) can potentially migrate to the B cell areas of secondary lymphoid tissues and suppress T cell-dependent B cell Ig response. T cell-dependent Ig response requires B cell stimulation by Th cells. It has been unknown whether Tregs can directly suppress B cells or whether they must suppress Th cells to suppress B cell response. We report here that Foxp3+ Tregs are found in T-B area borders and within germinal centers of human lymphoid tissues and can directly suppress B cell Ig response. Although Tregs can effectively suppress T cells, they can also directly suppress B cell response without the need to first suppress Th cells. The direct suppression of B cell Ig production by Tregs is accompanied by inhibition of Ig class switch recombination.

PMID:
16177055
[Indexed for MEDLINE]
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