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Articles by Tim Berendsen in JoVE
JoVE Bioengineering
Decelularização e Recellularization de Fígados inteiros
Decelularização perfusão é uma nova técnica para produzir scaffolds fígado inteiro que mantém a composição do órgão matriz extracelular e microarquitetura. Aqui, o método de preparação de andaimes órgão inteiro usando decelularização perfusão e repovoamento posterior com hepatócitos é descrito. Enxertos de fígado para transplante funcional e pode ser gerado usando esta técnica.
Other articles by Tim Berendsen on PubMed
Excorporeal Normothermic Machine Perfusion Resuscitates Pig DCD Livers with Extended Warm Ischemia
BACKGROUND: The shortage in donor livers has led to increased use of allografts derived from donation after cardiac death (DCD). The compromised viability in these livers leads to inferior post-transplantation allograft function and survival compared with donation after brain death (DBD) donor grafts. In this study, we reconditioned DCD livers using an optimized normothermic machine perfusion system. METHODS: Livers from 12 Yorkshire pigs (20-30 kg) were subjected to either 0 min (WI-0 group, n = 6) or 60 min (WI-60 group, n = 6) of warm ischemia and 2 h of cold storage in UW solution, followed by 4 h of oxygenated sanguineous normothermic machine perfusion. Liver viability and metabolic function were analyzed hourly. RESULTS: Warm ischemic livers showed elevated transaminase levels and reduced ATP concentration. After the start of machine perfusion, transaminase levels stabilized and there was recovery of tissue ATP, coinciding with an increase in bile production. These parameters reached comparable levels to the control group after 1 h of machine perfusion. Histology and gross morphology confirmed recovery of the ischemic allografts. CONCLUSION: Our data demonstrate that metabolic and functional parameters of livers with extended warm ischemic time (60 min) can be significantly improved using normothermic machine perfusion. We hereby compound the existing body of evidence that machine perfusion is a viable solution for reconditioning marginal organs.
