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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 Am+J+Transplant
2016 ; 16
(6
): 1751-65
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Pseudomonas aeruginosa Induced Airway Epithelial Injury Drives Fibroblast
Activation: A Mechanism in Chronic Lung Allograft Dysfunction
#MMPMID26714197
Borthwick LA
; Suwara MI
; Carnell SC
; Green NJ
; Mahida R
; Dixon D
; Gillespie CS
; Cartwright TN
; Horabin J
; Walker A
; Olin E
; Rangar M
; Gardner A
; Mann J
; Corris PA
; Mann DA
; Fisher AJ
Am J Transplant
2016[Jun]; 16
(6
): 1751-65
PMID26714197
show ga
Bacterial infections after lung transplantation cause airway epithelial injury
and are associated with an increased risk of developing bronchiolitis obliterans
syndrome. The damaged epithelium is a source of alarmins that activate the innate
immune system, yet their ability to activate fibroblasts in the development of
bronchiolitis obliterans syndrome has not been evaluated. Two epithelial alarmins
were measured longitudinally in bronchoalveolar lavages from lung transplant
recipients who developed bronchiolitis obliterans syndrome and were compared to
stable controls. In addition, conditioned media from human airway epithelial
cells infected with Pseudomonas aeruginosa was applied to lung fibroblasts and
inflammatory responses were determined. Interleukin-1 alpha (IL-1?) was increased
in bronchoalveolar lavage of lung transplant recipients growing P. aeruginosa
(11.5 [5.4-21.8] vs. 2.8 [0.9-9.4] pg/mL, p < 0.01) and was significantly
elevated within 3 months of developing bronchiolitis obliterans syndrome (8.3
[1.4-25.1] vs. 3.6 [0.6-17.1] pg/mL, p < 0.01), whereas high mobility group
protein B1 remained unchanged. IL-1? positively correlated with elevated
bronchoalveolar lavage IL-8 levels (r(2) = 0.6095, p < 0.0001) and neutrophil
percentage (r(2) = 0.25, p = 0.01). Conditioned media from P. aeruginosa
infected epithelial cells induced a potent pro-inflammatory phenotype in
fibroblasts via an IL-1?/IL-1R-dependent signaling pathway. In conclusion, we
propose that IL-1? may be a novel therapeutic target to limit Pseudomonas
associated allograft injury after lung transplantation.