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    Evaluation of a novel bioartificial liver in rats with complete liver ischemia: treatment efficacy and species-specific alpha-GST detection to monitor hepatocyte viability


    Flendring, Leonard M. and Chamuleau, Robert A.F.M. and Maas, Martinus A.W. and Daalhuisen, Joost and Hasset, Brian and Kilty, Cormac G. and Doyle, Sean and Ladiges, Nita C.J.J. and Jörning, George G.A. and la Soe, John W. and Sommeijer, Dirkje and te Velde, Anje A. (1999) Evaluation of a novel bioartificial liver in rats with complete liver ischemia: treatment efficacy and species-specific alpha-GST detection to monitor hepatocyte viability. Journal of Hepatology, 30 (2). pp. 311-321. ISSN 0168-8278

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    Abstract

    BACKGROUND/AIMS: There is an urgent need for an effective bioartificial liver system to bridge patients with fulminant hepatic failure to liver transplantation or to regeneration of their own liver. Recently, we proposed a bioreactor with a novel design for use as a bioartificial liver (BAL). The reactor comprises a spirally wound nonwoven polyester fabric in which hepatocytes are cultured (40 x 10(6) cells/ml) as small aggregates and homogeneously distributed oxygenation tubing for decentralized oxygen supply and CO2 removal. The aims of this study were to evaluate the treatment efficacy of our original porcine hepatocyte-based BAL in rats with fulminant hepatic failure due to liver ischemia (LIS) and to monitor the viability of the porcine hepatocytes in the bioreactor during treatment. The latter aim is novel and was accomplished by applying a new species-specific enzyme immunoassay (EIA) for the determination of porcine alpha-glutathione S-transferase (alpha-GST), a marker for hepatocellular damage. METHODS: Three experimental groups were studied: the first control group (LIS Control, n = 13) received a glucose infusion only; a second control group (LIS No-Cell-BAL, n = 8) received BAL treatment without cells; and the treated group (LIS Cell-BAL, n = 8) was connected to our BAL which had been seeded with 4.4 x 10(8) viable primary porcine hepatocytes. RESULTS/CONCLUSIONS: In contrast to previous comparable studies, BAL treatment significantly improved survival time in recipients with LIS. In addition, the onset of hepatic encephalopathy was significantly delayed and the mean arterial blood pressure significantly improved. Significantly lower levels of ammonia and lactate in the LIS Cell-BAL group indicated that the porcine hepatocytes in the bioreactor were metabolically activity. Low pig alpha-GST levels suggested that our bioreactor was capable of maintaining hepatocyte viability during treatment. These results provide a rationale for a comparable study in LIS-pigs as a next step towards potential clinical application.

    Item Type: Article
    Keywords: Alpha-GST; Bioartificial liver; Bioreactor; Hepatocytes; Liver support; Oxygenator; Polyester nonwoven; Xenogeneic;
    Academic Unit: Faculty of Science and Engineering > Biology
    Item ID: 7403
    Identification Number: https://doi.org/10.1016/S0168-8278(99)80078-6
    Depositing User: Dr. Sean Doyle
    Date Deposited: 29 Aug 2016 15:30
    Journal or Publication Title: Journal of Hepatology
    Publisher: Elsevier
    Refereed: Yes
    URI:

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