Peyer's patch is the essential site in initiating murine acute and lethal graft-versus-host reaction - PubMed (original) (raw)

doi: 10.1038/ni879. Epub 2003 Jan 13.

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Peyer's patch is the essential site in initiating murine acute and lethal graft-versus-host reaction

Masako Murai et al. Nat Immunol. 2003 Feb.

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Abstract

Acute graft-versus-host disease (a-GVHD) is initiated primarily by immunologically competent cytotoxic T cells (CTLs) that express anti-host specificities. However, the host lymphoid compartment in which these precursor CTLs are initially stimulated remains unclear. Here we show that gut Peyer's patches (PPs) are required to activate anti-host CTL responses in a well characterized murine acute graft-versus-host reaction (a-GVHR) model, involving transfer of parent lymphocytes into F1 hybrid recipients. The a-GVHR was prevented when recruitment of donor T cells into PP was interrupted either by disrupting the gene encoding chemokine receptor CCR5 or by blocking integrin alpha(4)beta(7)-MAdCAM-1 (mucosal vascular addressin) interactions. Mice deficient for PPs failed to develop a-GVHD in two models of disease induction. Thus, blockade of CTL generation in PPs might offer new strategies for circumventing a-GVHD.

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