Normothermic Ex Vivo Lung Perfusion in Brain-dead Donors Reduces Inflammatory Cytokines and Toll-like Receptor Expression
-
Shadi Shafaghi
,
Esmaeil Mortaz
,
Azizollah Abbasi Dezfuli
,
Hoda Godarzi
,
Kambiz Sheikhy
,
Zahra Ansari Aval
,
Behrooz Farzanegan
,
Habib Emami
,
Fatemeh Sadat Hosseini-Baharanchi
,
Katayoun Najafizadeh
Abstract
Inflammatory responses and innate immunologic reactions play an important role in the respiratory system. Ex vivo lung perfusion (EVLP) is considered a novel method in the evaluation and reconditioning of donor lungs prior to transplantation. However, EVLP’s effect on inflammatory and metabolic markers of human lung tissue is unknown. This study investigated how the performance of EVLP on brain-dead (BD) donor lungs affects the production and release of inflammatory cytokines (IL-6, IL-8, and TNF-a), inflammatory cells and toll-like receptors (TLR) -2, 4. This study was conducted with an animal subject for qualification of EVLP team and then EVLP was performed on 4 human cases referred to Masih Daneshvari Hospital (Tehran,Iran), from May 2013 to July 2015. Two of these cases, who had acceptable lung function parameters, were enrolled in this study for immunologic investigations. Bronchoalveolar lavages (BAL) were taken before and after EVLP. Cytokines were quantitatively measured before lung retrieval, at the end of the lung removal, at the start of EVLP, and at the end of the each hour of EVLP. TLR expression was measured on the cells obtained by flow cytometry. TNF-a, IL-6 and IL-8 decreased in each stage of washing perfusate in both cases, and the level of cytokines in serum was in the normal range. Flow cytometry analysis revealed a decreasing expression of CD3, CD4/8, CD19, and CD16+56, as well as TLR-2 and TLR-4 in both cases. Intra-capillary pools of pro-inflammatory cytokines (IL-6, IL-8, and TNF-a) were determined to contribute to the lung injury during prolonged lung perfusion. This raises the possibility that EVLP donor lungs could be less immunogenic than standard lungs. However, to assess EVLP’s effects on lung grafts and optimize recipient outcomes, further studies with a sufficient number of lungs are required.
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| Issue | Vol 15, No 5 (2016) | |
| Section | Original Article(s) | |
| Keywords | ||
| Cytokines Ex vivo lung perfusion (EVLP) Lung transplantation TNF-a TLR | ||
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