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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 PLoS+One
2017 ; 12
(5
): e0177339
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Pre-transplant immune factors may be associated with BK polyomavirus reactivation
in kidney transplant recipients
#MMPMID28562595
DeWolfe D
; Gandhi J
; Mackenzie MR
; Broge TA Jr
; Bord E
; Babwah A
; Mandelbrot DA
; Pavlakis M
; Cardarelli F
; Viscidi R
; Chandraker A
; Tan CS
PLoS One
2017[]; 12
(5
): e0177339
PMID28562595
show ga
BK polyomavirus (BKPyV) reactivation in kidney transplant recipients can lead to
allograft damage and loss. The elements of the adaptive immune system that are
permissive of reactivation and responsible for viral control remain incompletely
described. We performed a prospective study evaluating BKPyV-specific T-cell
response, humoral response and overall T-cell phenotype beginning pre-transplant
through one year post-transplant in 28 patients at two centers. We performed an
exploratory analysis of risk factors for the development of viremia and viruria
as well as compared the immune response to BKPyV in these groups and those who
remained BK negative. 6 patients developed viruria and 3 developed viremia.
BKPyV-specific CD8+ T-cells increased post-transplant in viremic and viruric but
not BK negative patients. BKPyV-specific CD4+ T-cells increased in viremic, but
not viruric or BK negative patients. Anti-BKPyV IgG antibodies increased in
viruric and viremic patients but remained unchanged in BK negative patients.
Viremic patients had a greater proportion of CD8+ effector cells pre-transplant
and at 12 months post-transplant. Viremic patients had fewer CD4+ effector memory
cells at 3 months post-transplant. Exploratory analysis demonstrated lower CD4
and higher total CD8 proportions, higher anti-BKPyV antibody titers and the cause
of renal failure were associated BKPyV reactivation. In conclusion, low CD4, high
CD8 and increased effector CD8 cells were found pre-transplant in patients who
became viremic, a phenotype associated with immune senescence. This
pre-transplant T-cell senescence phenotype could potentially be used to identify
patients at increased risk of BKPyV reactivation.