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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+Am+Soc+Nephrol
2014 ; 25
(11
): 2471-82
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Cytomegalovirus-responsive ?? T cells: novel effector cells in antibody-mediated
kidney allograft microcirculation lesions
#MMPMID24744438
Bachelet T
; Couzi L
; Pitard V
; Sicard X
; Rigothier C
; Lepreux S
; Moreau JF
; Taupin JL
; Merville P
; Déchanet-Merville J
J Am Soc Nephrol
2014[Nov]; 25
(11
): 2471-82
PMID24744438
show ga
Human cytomegalovirus infection in transplant recipients has been associated with
adverse renal allograft outcome and with a large ?? T-cell response, but whether
both mechanisms are connected is unknown. We previously showed that most expanded
circulating cytomegalovirus-responsive ?? T cells express the Fc?-receptor CD16,
suggesting that ?? T cells may participate in allograft lesions mediated by
donor-specific antibodies through antibody-dependent cellular cytotoxicity. Here,
we show that cytomegalovirus-specific CD16(pos) ?? T cells can perform
antibody-dependent cellular cytotoxicity against stromal cells coated with
donor-specific antibodies in vitro. In vivo, graft-infiltrating ?? T cells
localized in close contact with endothelial cells only in patients who
experienced cytomegalovirus infection and were more frequent within peritubular
capillaries and glomeruli from antibody-mediated acute rejections than within
those from T cell-mediated acute rejections. Finally, a persistently increased
percentage of circulating cytomegalovirus-induced ?? T cells correlated inversely
with the 1-year eGFR only in kidney recipients with donor-specific antibodies.
Collectively, these data support the conclusion that cytomegalovirus-induced ?? T
cells are involved in, and may serve as a clinical biomarker of,
antibody-mediated lesions of kidney transplants. Moreover, these findings offer a
new physiopathologic link between cytomegalovirus infection and allograft
dysfunction in recipients with donor-specific antibodies.