We set a model of brain death, donor management, and lung transplantation for studies on lung preservation and reconditioning before transplantation.Methods Ten pigs (39.7 ± 5.9 Kg) were investigated. Five animals underwent brain death and were treated as organ donors; the lungs were then procured and cold stored (Ischemia). Five recipients underwent left lung transplantation and post-reperfusion follow-up (Graft). Cardiorespiratory and metabolic parameters were collected. Lung gene expression of cytokines (tumor necrosis factor alpha (TNFα), interleukin-1 beta (IL-1β), interleukin-6 (IL-6), interferon gamma (IFNγ), high mobility group box-1 (HMGB-1)), chemokines (chemokine CC motif ligand-2 (CCL2-MCP-1), chemokine CXC motif ligand-10 (CXCL-10), interleukin-8 (IL-8)), and endothelial activation markers (endothelin-1 (EDN-1), intercellular adhesion molecule-1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1), selectin-E (SELE)) was assessed by real-time polymerase chain reaction (PCR). Results Tachycardia and hypertension occurred during brain death induction; cardiac output rose, systemic vascular resistance dropped (P < 0.05), and diabetes insipidus occurred. Lung-protective ventilation strategy was applied: 9 h after brain death induction, PaO2 was 192 ± 12 mmHg at positive end-expiratory pressure (PEEP) 8.0 ± 1.8 cmH2O and FiO2 of 40%; wet-to-dry ratio (W/D) was 5.8 ± 0.5, and extravascular lung water (EVLW) was 359 ± 80 mL. Procured lungs were cold-stored for 471 ± 24 min (Ischemia) at the end of which W/D was 6.1 ± 0.9. Left lungs were transplanted and reperfused (warm ischemia 98 ± 14 min). Six hours after controlled reperfusion, PaO2 was 192 ± 23 mmHg (PEEP 8.7 ± 1.5 cmH2O, FiO2 40%), W/D was 5.6 ± 0.4, and EVLW was 366 ± 117 mL. Levels of IL-8 rose at the end of donor management (BD, P < 0.05); CCL2-MCP-1, IL-8, HMGB-1, and SELE were significantly altered after reperfusion (Graft, P < 0.05). Conclusions We have set a standardized, reproducible pig model resembling the entire process of organ donation that may be used as a platform to test in vivo and ex vivo strategies of donor lung optimization before transplantation.
A standardized model of brain death, donor treatment, and lung transplantation for studies on organ preservation and reconditioning / F. Valenza, S. Coppola, S. Froio, G.M. Ruggeri, J. Fumagalli, A.M. Villa, L. Rosso, P. Mendogni, G. Conte, C. Lonati, A. Carlin, P. Leonardi, S. Gatti, N. Stocchetti, L. Gattinoni. - In: INTENSIVE CARE MEDICINE EXPERIMENTAL. - ISSN 2197-425X. - 2(2014 Dec), pp. 12.1-12.18.
|Titolo:||A standardized model of brain death, donor treatment, and lung transplantation for studies on organ preservation and reconditioning|
VALENZA, FRANCO (Primo)
COPPOLA, SILVIA (Secondo)
STOCCHETTI, NINO (Penultimo)
GATTINONI, LUCIANO (Ultimo)
|Settore Scientifico Disciplinare:||Settore MED/41 - Anestesiologia|
|Data di pubblicazione:||dic-2014|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1186/2197-425X-2-12|
|Appare nelle tipologie:||01 - Articolo su periodico|