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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Immunol
2017 ; 198
(6
): 2500-2512
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Serum miR-29a Is Upregulated in Acute Graft-versus-Host Disease and Activates
Dendritic Cells through TLR Binding
#MMPMID28159900
Ranganathan P
; Ngankeu A
; Zitzer NC
; Leoncini P
; Yu X
; Casadei L
; Challagundla K
; Reichenbach DK
; Garman S
; Ruppert AS
; Volinia S
; Hofstetter J
; Efebera YA
; Devine SM
; Blazar BR
; Fabbri M
; Garzon R
J Immunol
2017[Mar]; 198
(6
): 2500-2512
PMID28159900
show ga
Acute graft-versus-host disease (aGVHD) continues to be a frequent and
devastating complication of allogeneic hematopoietic stem cell transplantation
(HSCT), posing as a significant barrier against the widespread use of HSCTs as a
curative modality. Recent studies suggested serum/plasma microRNAs (miRs) may
predict aGVHD onset. However, little is known about the functional role of
circulating miRs in aGVHD. In this article, we show in two independent cohorts
that miR-29a expression is significantly upregulated in the serum of allogeneic
HSCT patients at aGVHD onset compared with non-aGVHD patients. Serum miR-29a is
also elevated as early as 2 wk before time of diagnosis of aGVHD compared with
time-matched control subjects. We demonstrate novel functional significance of
serum miR-29a by showing that miR-29a binds and activates dendritic cells via
TLR7 and TLR8, resulting in the activation of the NF-?B pathway and secretion of
proinflammatory cytokines TNF-? and IL-6. Treatment with locked nucleic acid
anti-miR-29a significantly improved survival in a mouse model of aGVHD while
retaining graft-versus-leukemia effects, unveiling a novel therapeutic target in
aGVHD treatment or prevention.