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  • Title: A neutrophil elastase inhibitor improves lung function during ex vivo lung perfusion.
    Author: Harada M, Oto T, Otani S, Miyoshi K, Okada M, Iga N, Nishikawa H, Sugimoto S, Yamane M, Miyoshi S.
    Journal: Gen Thorac Cardiovasc Surg; 2015 Dec; 63(12):645-51. PubMed ID: 26346003.
    Abstract:
    OBJECTIVE: Ex vivo lung perfusion (EVLP) has been used not only for graft evaluation but also for graft reconditioning prior to lung transplantation. Inflammatory cells such as neutrophils may cause additional graft injury during EVLP. Neutrophil elastase inhibitors protect lungs against neutrophil-induced lung injury, such as acute respiratory distress syndrome. This study aimed to investigate the effect of a neutrophil elastase inhibitor during EVLP. METHODS: EVLP was performed for 4 h in bilateral pig lungs that had previously experienced warm ischemia for 2 h with or without a neutrophil elastase inhibitor (treated and control groups, respectively; n = 6). Following EVLP, the left lung was transplanted into a recipient pig, and this was followed by observation for 4 h. Pulmonary functions were observed both during EVLP and during the early post-transplant stage. RESULTS: During EVLP, decreases in neutrophil elastase levels (P < 0.001), the wet-dry weight ratio (P < 0.05), and pulmonary vascular resistance (P < 0.01) and increases in the PaO2/FiO2 ratio (P < 0.01) and pulmonary compliance (P < 0.05) were observed in the treated group. After transplantation, decreased pulmonary vascular resistance (P < 0.05) was observed in the treated group. CONCLUSIONS: A neutrophil elastase inhibitor attenuated the inflammatory response during EVLP and may decrease the incidence of lung reperfusion injury after transplantation.
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