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Bioartificial liver devices: Perspectives on the state of the art
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《医学前沿(英文)》 2011年 第5卷 第1期 页码 15-19 doi: 10.1007/s11684-010-0110-x
Acute liver failure remains a significant cause of morbidity and mortality. Bioartificial liver (BAL) devices have been in development for more than 20 years. Such devices aim to temporarily take over the metabolic and excretory functions of the liver until the patients’ own liver has recovered or a donor liver becomes available for transplant. The important issues include the choice of cell materials and the design of the bioreactor. Ideal BAL cell materials should be of good viability and functionality, easy to access, and exclude immunoreactive and tumorigenic cell materials. Unfortunately, the current cells in use in BAL do not meet these requirements. One of the challenges in BAL development is the improvement of current materials; another key point concerning cell materials is the coculture of different cells. The bioreactor is an important component of BAL, because it determines the viability and function of the hepatocytes within it. From the perspective of bioengineering, a successful and clinically effective bioreactor should mimic the structure of the liver and provide an in vivo-like microenvironment for the growth of hepatocytes, thereby maintaining the cells’ viability and function to the maximum extent. One future trend in the development of the bioreactor is to improve the oxygen supply system. Another direction for future research on bioreactors is the application of biomedical materials. In conclusion, BAL is, in principle, an important therapeutic strategy for patients with acute liver failure, and may also be a bridge to liver transplantation. It requires further research and development, however, before it can enter clinical practice.
关键词: acute liver failure bioartificial livers hepatocyte bioreactor
Machine perfusion versus cold storage of livers: a meta-analysis
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《医学前沿(英文)》 2016年 第10卷 第4期 页码 451-464 doi: 10.1007/s11684-016-0474-7
Different organ preservation methods are key factors influencing the results of liver transplantation. In this study, the outcomes of experimental models receiving donation after cardiac death (DCD) livers preserved through machine perfusion (MP) or static cold storage (CS) were compared by conducting a meta-analysis. Standardized mean difference (SMD) and 95% confidence interval (CI) were calculated to compare pooled data from two animal species. Twenty-four studies involving MP preservation were included in the meta-analysis. Compared with CS preservation, MP can reduce the levels of aspartate aminotransferase (AST), alanine aminotransferase (ALT), lactate dehydrogenase (LDH), and hyaluronic acid (HA) and the changes in liver weight. By contrast, MP can enhance bile production and portal vein flow (PVF). Alkaline phosphatase (ALP) levels and histological changes significantly differed between the two preservation methods. In conclusion, MP of DCD livers is superior to CS in experimental animals.
LINGHU Yan, ZHU Wujun, BAO Huai′en, CHEN Yan
《医学前沿(英文)》 2007年 第1卷 第3期 页码 258-263 doi: 10.1007/s11684-007-0049-8
关键词: hydropic degeneration significant difference -exposed favorable intermediate different
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