Proteomic Analysis of Primary Graft Dysfunction in Porcine Lung Transplantation Reveals Alveolar-Capillary Barrier Changes Underlying the High Particle Flow Rate in Exhaled Breath.
Transpl Int
; 37: 12298, 2024.
Article
en En
| MEDLINE
| ID: mdl-38741700
ABSTRACT
Primary graft dysfunction (PGD) remains a challenge for lung transplantation (LTx) recipients as a leading cause of poor early outcomes. New methods are needed for more detailed monitoring and understanding of the pathophysiology of PGD. The measurement of particle flow rate (PFR) in exhaled breath is a novel tool to monitor and understand the disease at the proteomic level. In total, 22 recipient pigs underwent orthotopic left LTx and were evaluated for PGD on postoperative day 3. Exhaled breath particles (EBPs) were evaluated by mass spectrometry and the proteome was compared to tissue biopsies and bronchoalveolar lavage fluid (BALF). Findings were confirmed in EBPs from 11 human transplant recipients. Recipients with PGD had significantly higher PFR [686.4 (449.7-8,824.0) particles per minute (ppm)] compared to recipients without PGD [116.6 (79.7-307.4) ppm, p = 0.0005]. Porcine and human EBP proteins recapitulated proteins found in the BAL, demonstrating its utility instead of more invasive techniques. Furthermore, adherens and tight junction proteins were underexpressed in PGD tissue. Histological and proteomic analysis found significant changes to the alveolar-capillary barrier explaining the high PFR in PGD. Exhaled breath measurement is proposed as a rapid and non-invasive bedside measurement of PGD.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Pruebas Respiratorias
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Líquido del Lavado Bronquioalveolar
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Trasplante de Pulmón
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Proteómica
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Disfunción Primaria del Injerto
Límite:
Animals
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Female
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Humans
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Male
Idioma:
En
Revista:
Transpl Int
Asunto de la revista:
TRANSPLANTE
Año:
2024
Tipo del documento:
Article
País de afiliación:
Suecia