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Deprecated: Implicit conversion from float 269.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 JCI+Insight ä ; 2 (12): ä Nephropedia Template TP
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An activated Th17-prone T cell subset involved in chronic graft-versus-host disease sensitive to pharmacological inhibition #MMPMID28614794
Forcade E; Paz K; Flynn R; Griesenauer B; Amet T; Li W; Liu L; Bakoyannis G; Jiang D; Chu HW; Lobera M; Yang J; Wilkes DS; Du J; Gartlan K; Hill GR; MacDonald KP; Espada EL; Blanco P; Serody JS; Koreth J; Cutler CS; Antin JH; Soiffer RJ; Ritz J; Paczesny S; Blazar BR
JCI Insight ä[]; 2 (12): ä PMID28614794show ga
Chronic graft-versus-host disease (cGvHD) remains a major complication of allogeneic stem cell transplantation requiring novel therapies. CD146 and CCR5 are expressed by activated T cells and associated with increased T cell migration capacity and Th17 polarization. We performed a multiparametric flow cytometry analysis in a cohort of 40 HSCT patients together with a cGvHD murine model to understand the role of CD146-expressing subsets. We observed an increased frequency of CD146+ CD4 T cells in the 20 patients with active cGvHD with enhanced ROR?t expression. This Th17-prone subset was enriched for cells coexpressing CD146 and CCR5 that harbor mixed Th1/Th17 features and were more frequent in cGvHD patients. Utilizing a murine cGvHD model with bronchiolitis obliterans (BO), we observed that donor T cells from CD146-deficient mice versus those from WT mice caused significantly reduced pulmonary cGvHD. Reduced cGvHD was not the result of failed germinal center B cell or T follicular helper cell generation. Instead, CD146-deficient T cells had significantly lower pulmonary macrophage infiltration and T cell CCR5, IL-17, and IFN-? coexpression, suggesting defective pulmonary end-organ effector mechanisms. We, thus, evaluated the effect of TMP778, a small-molecule ROR?t activity inhibitor. TMP778 markedly alleviated cGvHD in murine models similarly to agents targeting the Th17 pathway, such as STAT3 inhibitor or IL-17?blocking antibody. Our data suggest CD146-expressing T cells as a cGvHD biomarker and suggest that targeting the Th17 pathway may represent a promising therapy for cGvHD.