CXCL10-CXCR3 interactions play an important role in the pathogenesis of acute graft-versus-host disease in the skin following allogeneic stem-cell transplantation.

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CXCL10-CXCR3 interactions play an important role in the pathogenesis of acute graft-versus-host disease in the skin following allogeneic stem-cell transplantation by Karen P. Piper, Claire Horlock, S. John Curnow, Julie Arrazi, Sarah Nicholls, Premini Mahendra, Charles Craddock, and Paul A. H. Moss Blood Volume 110(12):3827-3832 December 1, 2007 ©2007 by American Society of Hematology

The kinetics of serum chemokine levels in SCT patients with and without GVHD. (A) CCL5 and (B) CXCL10 levels in patients with (—) or without (- - -) aGVHD. The kinetics of serum chemokine levels in SCT patients with and without GVHD. (A) CCL5 and (B) CXCL10 levels in patients with (—) or without (- - -) aGVHD. Data presented as means plus SE bars. Karen P. Piper et al. Blood 2007;110:3827-3832 ©2007 by American Society of Hematology

Comparison of cytokine and chemokine levels between myeloablative and nonmyeloablative SCT patients with and without GVHD. Patients with and without GVHD were subdivided into those who underwent myeloablative transplantation and those who underwent nonmyelo... Comparison of cytokine and chemokine levels between myeloablative and nonmyeloablative SCT patients with and without GVHD. Patients with and without GVHD were subdivided into those who underwent myeloablative transplantation and those who underwent nonmyeloablative transplantation. Solid lines represent median markers. P values were calculated using the Mann-Whitney U test (*P < .05; **P < .01). Karen P. Piper et al. Blood 2007;110:3827-3832 ©2007 by American Society of Hematology

CXCR3 expression on naive, memory, and regulatory T-cell subsets from SCT patients with and without GVHD. CXCR3 expression on naive (CCR7+CD45RA+), central memory (CCR7+CD45RA−), effector memory (CCR7−CD45RA−), and effector memory revertant (CCR7−CD45RA+) C... CXCR3 expression on naive, memory, and regulatory T-cell subsets from SCT patients with and without GVHD. CXCR3 expression on naive (CCR7+CD45RA+), central memory (CCR7+CD45RA−), effector memory (CCR7−CD45RA−), and effector memory revertant (CCR7−CD45RA+) CD4+ (A) and CD8+ (B) T cells from SCT patients with GVHD (▨) and without GVHD (□). The y-axis represents the proportion of T cells positive for CXCR3. Bars represent median and range. (C) Regulatory T-cell numbers in PBMCs. PBMCs were gated on CD4+CD45RO+ T cells and T reg frequency was determined by their positive expression for CD25 and low expression for CD127. (D) CXCR3 expression on T reg cells. ▴ indicates SCT patients with GVHD; ▵ indicates control SCT patients without GVHD. The y-axis represents the number of cells positive for marker(s) per microliter of peripheral blood. Solid line represents the mean. Karen P. Piper et al. Blood 2007;110:3827-3832 ©2007 by American Society of Hematology

Expression of CXCL10 and CXCR3 in skin biopsies from patients with aGVHD and control patients. Expression of CXCL10 and CXCR3 in skin biopsies from patients with aGVHD and control patients. A representative example from 11 patients with GVHD and 5 control patients. Single enzymatic staining for CXCL10 (ligand; brown stain) showed significant expression of CXCL10 in basal keratinocytes of the epidermal (e) layer of aGVHD skin versus no expression on control tissue. CXCR3 expression (brown stain) was located to the dermal (d) infiltrates located in close proximity to the epidermis in aGVHD skin. Control tissue lacked these infiltrates but showed some CXCR3 expression on scattered T cells within the dermis. Arrows indicate positive staining. See “Immunohistochemistry” for complete image acquisition information. Karen P. Piper et al. Blood 2007;110:3827-3832 ©2007 by American Society of Hematology