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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
2015 ; 194
(6
): 2899-908
Nephropedia Template TP
gab.com Text
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English Wikipedia
Transient blockade of delta-like Notch ligands prevents allograft rejection
mediated by cellular and humoral mechanisms in a mouse model of heart
transplantation
#MMPMID25687759
Wood S
; Feng J
; Chung J
; Radojcic V
; Sandy-Sloat AR
; Friedman A
; Shelton A
; Yan M
; Siebel CW
; Bishop DK
; Maillard I
J Immunol
2015[Mar]; 194
(6
): 2899-908
PMID25687759
show ga
Rejection remains a major clinical challenge limiting allograft survival after
solid organ transplantation. Both cellular and humoral immunity contribute to
this complication, with increased recognition of Ab-mediated damage during acute
and chronic rejection. Using a mouse model of MHC-mismatched heart
transplantation, we report markedly protective effects of Notch inhibition,
dampening both T cell and Ab-driven rejection. T cell-specific pan-Notch blockade
prolonged heart allograft survival and decreased IFN-? and IL-4 production by
alloreactive T cells, especially when combined with depletion of recipient CD8(+)
T cells. These effects were associated with decreased infiltration by
conventional T cells and an increased proportion of regulatory T cells in the
graft. Transient administration of neutralizing Abs specific for delta-like
(Dll)1/4 Notch ligands in the peritransplant period led to prolonged acceptance
of allogeneic hearts, with superior outcome over Notch inhibition only in T
cells. Systemic Dll1/4 inhibition decreased T cell cytokines and graft
infiltration, germinal center B cell and plasmablast numbers, as well as
production of donor-specific alloantibodies and complement deposition in the
transplanted hearts. Dll1 or Dll4 inhibition alone provided partial protection.
Thus, pathogenic signals delivered by Dll1/4 Notch ligands early after
transplantation promote organ rejection through several complementary mechanisms.
Transient interruption of these signals represents an attractive new therapeutic
strategy to enhance long-term allograft survival.