1
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Catapano G, Unger JK, Zanetti EM, Fragomeni G, Gerlach JC. Kinetic Analysis of Lidocaine Elimination by Pig Liver Cells Cultured in 3D Multi-Compartment Hollow Fiber Membrane Network Perfusion Bioreactors. Bioengineering (Basel) 2021; 8:104. [PMID: 34436107 PMCID: PMC8389311 DOI: 10.3390/bioengineering8080104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 07/15/2021] [Accepted: 07/21/2021] [Indexed: 11/16/2022] Open
Abstract
Liver cells cultured in 3D bioreactors is an interesting option for temporary extracorporeal liver support in the treatment of acute liver failure and for animal models for preclinical drug screening. Bioreactor capacity to eliminate drugs is generally used for assessing cell metabolic competence in different bioreactors or to scale-up bioreactor design and performance for clinical or preclinical applications. However, drug adsorption and physical transport often disguise the intrinsic drug biotransformation kinetics and cell metabolic state. In this study, we characterized the intrinsic kinetics of lidocaine elimination and adsorption by porcine liver cells cultured in 3D four-compartment hollow fiber membrane network perfusion bioreactors. Models of lidocaine transport and biotransformation were used to extract intrinsic kinetic information from response to lidocaine bolus of bioreactor versus adhesion cultures. Different from 2D adhesion cultures, cells in the bioreactors are organized in liver-like aggregates. Adsorption on bioreactor constituents significantly affected lidocaine elimination and was effectively accounted for in kinetic analysis. Lidocaine elimination and cellular monoethylglicinexylidide biotransformation featured first-order kinetics with near-to-in vivo cell-specific capacity that was retained for times suitable for clinical assist and drug screening. Different from 2D cultures, cells in the 3D bioreactors challenged with lidocaine were exposed to close-to-physiological lidocaine and monoethylglicinexylidide concentration profiles. Kinetic analysis suggests bioreactor technology feasibility for preclinical drug screening and patient assist and that drug adsorption should be accounted for to assess cell state in different cultures and when laboratory bioreactor design and performance is scaled-up to clinical use or toxicological drug screening.
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Affiliation(s)
- Gerardo Catapano
- Department of Mechanical, Energy and Management Engineering, University of Calabria, Via P. Bucci, I, 87030 Rende, CS, Italy;
| | - Juliane K. Unger
- Department of Experimental Medicine, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin, 10117 Berlin, Germany;
| | | | - Gionata Fragomeni
- Department of Medical and Surgical Sciences, Magna Graecia University, 88100 Catanzaro, Italy;
| | - Jörg C. Gerlach
- Department of Surgery, School of Medicine, University of Pittsburgh, & McGowan Institute for Regenerative Medicine, Pittsburgh, PA 15213, USA; or
- Department of Bioengineering, School of Medicine, University of Pittsburgh, & McGowan Institute for Regenerative Medicine, Pittsburgh, PA 15213, USA
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2
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Nicolas CT, Kaiser RA, Hickey RD, Allen KL, Du Z, VanLith CJ, Guthman RM, Amiot B, Suksanpaisan L, Han B, Francipane MG, Cheikhi A, Jiang H, Bansal A, Pandey MK, Garg I, Lowe V, Bhagwate A, O’Brien D, Kocher JPA, DeGrado TR, Nyberg SL, Lagasse E, Lillegard JB. Ex Vivo Cell Therapy by Ectopic Hepatocyte Transplantation Treats the Porcine Tyrosinemia Model of Acute Liver Failure. Mol Ther Methods Clin Dev 2020; 18:738-750. [PMID: 32913881 PMCID: PMC7452193 DOI: 10.1016/j.omtm.2020.07.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 07/07/2020] [Indexed: 11/19/2022]
Abstract
The effectiveness of cell-based therapies to treat liver failure is often limited by the diseased liver environment. Here, we provide preclinical proof of concept for hepatocyte transplantation into lymph nodes as a cure for liver failure in a large-animal model with hereditary tyrosinemia type 1 (HT1), a metabolic liver disease caused by deficiency of fumarylacetoacetate hydrolase (FAH) enzyme. Autologous porcine hepatocytes were transduced ex vivo with a lentiviral vector carrying the pig Fah gene and transplanted into mesenteric lymph nodes. Hepatocytes showed early (6 h) and durable (8 months) engraftment in lymph nodes, with reproduction of vascular and hepatic microarchitecture. Subsequently, hepatocytes migrated to and repopulated the native diseased liver. The corrected cells generated sufficient liver mass to clinically ameliorate the acute liver failure and HT1 disease as early as 97 days post-transplantation. Integration site analysis defined the corrected hepatocytes in the liver as a subpopulation of hepatocytes from lymph nodes, indicating that the lymph nodes served as a source for healthy hepatocytes to repopulate a diseased liver. Therefore, ectopic transplantation of healthy hepatocytes cures this pig model of liver failure and presents a promising approach for the development of cures for liver disease in patients.
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Affiliation(s)
- Clara T. Nicolas
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA
- Faculty of Medicine, University of Barcelona, Barcelona, Spain
- Department of Surgery, University of Alabama Birmingham, Birmingham, AL, USA
| | - Robert A. Kaiser
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA
- Children’s Hospitals and Clinics of Minnesota, Midwest Fetal Care Center, Minneapolis, MN, USA
| | | | - Kari L. Allen
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Zeji Du
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | | | - Rebekah M. Guthman
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA
- Medical College of Wisconsin, Wausau, WI, USA
| | - Bruce Amiot
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | | | - Bing Han
- McGowan Institute for Regenerative Medicine and Department of Pathology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Maria Giovanna Francipane
- McGowan Institute for Regenerative Medicine and Department of Pathology, University of Pittsburgh, Pittsburgh, PA, USA
- Ri.MED Foundation, Palermo, Italy
| | - Amin Cheikhi
- Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA
| | - Huailei Jiang
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | - Aditya Bansal
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | | | - Ishan Garg
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | - Val Lowe
- Department of Radiology, Mayo Clinic, Rochester, MN, USA
| | - Aditya Bhagwate
- Department of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN, USA
| | - Daniel O’Brien
- Department of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN, USA
| | - Jean-Pierre A. Kocher
- Department of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN, USA
| | | | - Scott L. Nyberg
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Eric Lagasse
- McGowan Institute for Regenerative Medicine and Department of Pathology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Joseph B. Lillegard
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA
- Children’s Hospitals and Clinics of Minnesota, Midwest Fetal Care Center, Minneapolis, MN, USA
- Pediatric Surgical Associates, Minneapolis, MN, USA
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3
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Chen HS, Joo DJ, Shaheen M, Li Y, Wang Y, Yang J, Nicolas CT, Predmore K, Amiot B, Michalak G, Mounajjed T, Fidler J, Kremers WK, Nyberg SL. Randomized Trial of Spheroid Reservoir Bioartificial Liver in Porcine Model of Posthepatectomy Liver Failure. Hepatology 2019; 69:329-342. [PMID: 30022502 PMCID: PMC6527364 DOI: 10.1002/hep.30184] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2018] [Accepted: 07/15/2018] [Indexed: 02/05/2023]
Abstract
Acute liver failure (ALF) is a catastrophic condition that can occur after major liver resection. The aim of this study was to determine the effects of the spheroid reservoir bio-artificial liver (SRBAL) on survival, serum chemistry, and liver regeneration in posthepatectomy ALF pigs. Wild-type large white swine (20 kg-30 kg) underwent intracranial pressure (ICP) probe placement followed by 85% hepatectomy. Computed tomography (CT) volumetrics were performed to measure the extent of resection, and at 48 hours following hepatectomy to assess regeneration of the remnant liver. Animals were randomized into three groups based on treatment delivered 24-48 hours after hepatectomy: Group1-standard medical therapy (SMT, n = 6); Group2-SMT plus bio-artificial liver treatment using no hepatocytes (0 g, n = 6); and Group3-SMT plus SRBAL treatment using 200 g of primary porcine hepatocyte spheroids (200 g, n = 6). The primary endpoint was survival to 90 hours following hepatectomy. Death equivalent was defined as unresponsive grade 4 hepatic encephalopathy or ICP greater than 20 mmHg with clinical evidence of brain herniation. All animals in both (SMT and 0 g) control groups met the death equivalent before 51 hours following hepatectomy. Five of 6 animals in the 200-g group survived to 90 hours (P < 0.01). The mean ammonia, ICP, and international normalized ratio values were significantly lower in the 200-g group. CT volumetrics demonstrated increased volume regeneration at 48 hours following hepatectomy in the 200-g group compared with the SMT (P < 0.01) and 0-g (P < 0.01) groups. Ki-67 staining showed increased positive staining at 48 hours following hepatectomy (P < 0.01). Conclusion: The SRBAL improved survival, reduced ammonia, and accelerated liver regeneration in posthepatectomy ALF. Improved survival was associated with a neuroprotective benefit of SRBAL therapy. These favorable results warrant further clinical testing of the SRBAL.
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Affiliation(s)
- Harvey S. Chen
- William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN
| | - Dong Jin Joo
- William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN,Department of Surgery, Yonsei University College of Medicine, Seoul, South Korea
| | - Mohammed Shaheen
- William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN
| | - Yi Li
- William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN,West China Hospital, Sichuan University, Chengdu, Sichuan China
| | - Yujia Wang
- William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN,West China Hospital, Sichuan University, Chengdu, Sichuan China
| | - Jian Yang
- William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN,West China Hospital, Sichuan University, Chengdu, Sichuan China
| | - Clara T. Nicolas
- William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN
| | - Kelly Predmore
- William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN
| | - Bruce Amiot
- William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN
| | | | - Taofic Mounajjed
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN
| | - Jeff Fidler
- Department of Radiology, Mayo Clinic, Rochester, MN
| | - Walter K. Kremers
- William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN,Department of Biostatistics, Mayo Clinic, Rochester, MN
| | - Scott L. Nyberg
- William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN
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4
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Hepatocyte spheroids as an alternative to single cells for transplantation after ex vivo gene therapy in mice and pig models. Surgery 2018; 164:473-481. [PMID: 29884476 DOI: 10.1016/j.surg.2018.04.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 03/31/2018] [Accepted: 04/12/2018] [Indexed: 11/20/2022]
Abstract
BACKGROUND Autologous hepatocyte transplantation after ex vivo gene therapy is an alternative to liver transplantation for metabolic liver disease. Here we evaluate ex vivo gene therapy followed by transplantation of single-cell or spheroid hepatocytes. METHODS Pig and mouse hepatocytes were isolated, labeled with zirconium-89 and returned to the liver as single cells or spheroids. Biodistribution was evaluated through positron emission tomography-computed tomography. Fumarylacetoacetate hydrolase-deficient pig hepatocytes were isolated and transduced with a lentiviral vector containing the Fah gene. Animals received portal vein infusion of single-cell or spheroid autologous hepatocytes after ex vivo gene delivery. Portal pressures were measured and ultrasound was used to evaluate for thrombus. Differences in engraftment and expansion of ex vivo corrected single-cell or spheroid hepatocytes were followed through histologic analysis and animals' ability to thrive off 2-(2-nitro-4-trifluoromethylbenzoyl)-1,3-cyclohexanedione. RESULTS Positron emission tomography-computed tomography imaging showed spheroid hepatocytes with increased heterogeneity in biodistribution as compared with single cells, which spread more uniformly throughout the liver. Animals receiving spheroids experienced higher mean changes in portal pressure than animals receiving single cells (P < .01). Additionally, two animals from the spheroid group developed portal vein thrombi that required systemic anticoagulation. Immunohistochemical analysis of spheroid- and single-cell-transplanted animals showed similar engraftment and expansion rates of fumarylacetoacetate hydrolase-positive hepatocytes in the liver, correlating with similar weight stabilization curves. CONCLUSION Ex vivo gene correction of autologous hepatocytes in fumarylacetoacetate hydrolase-deficient pigs can be performed using hepatocyte spheroids or single-cell hepatocytes, with spheroids showing a more heterogeneous distribution within the liver and higher risks for portal vein thrombosis and increased portal pressures.
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5
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Unger J, Catapano G, Horn N, Schroers A, Gerlach J, Rossaint R. Comparative Analysis of Metabolism of Medium-and Plasma Perfused Primary Pig Hepatocytes Cultured around a 3-D Membrane Network. Int J Artif Organs 2018. [DOI: 10.1177/039139880002300207] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Culture media are frequently used in the evaluation of metabolical functions of hepatocytes in hybrid liver support systems (hLSS). However, media compositions differ substantially from those of plasma. Therefore, our study was designed to investigate whether current in vitro studies with medium are suitable to assess the metabolical competence of hLSS-cultures during clinical application as well as to explore whether the cell nutrition with medium provides a suitable modus operandi for stand by cultivation. Paired bioreactor cultures were perfused with either Williams’ Medium E (MPB) or human plasma (PPB). About 6x108 primary pig hepatocytes (>97% viability) were cultured in three laboratory scale bioreactors designed according to Gerlach's bioreactor-concept. Different perfusion protocols were initiated after a standardised period allowing for cell attachment and reorganisation in aggregates. Whereas patterns of enzyme release were similar in both protocols the metabolical behaviour was different between MPB (anabolic state) and PPB (catabolic state). Furthermore, compared to MPB the lidocaine-MEGX-tests for PPB demonstrated lower MEGX-concentrations and a different reaction pattern. We conclude that the nutrition of hepatocytes with medium during the stand by period itself might influence the cell function and subsequently the efficacy of the hLSS-treatment during clinical application. (Int J Artif Organs 2000; 23: 104–10)
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Affiliation(s)
- J.K. Unger
- Department of Anaesthesiology, Rheinisch-Westfälische Technische Hochschule, Aachen - Germany
| | - G. Catapano
- Department of Chemical Engineering and Materials, University of Calabria - Italy
| | - N.A. Horn
- Department of Anaesthesiology, Rheinisch-Westfälische Technische Hochschule, Aachen - Germany
| | - A. Schroers
- Bioengineering Unit, University of Strathclyde, Glasgow, Scotland - UK
| | - J.C. Gerlach
- Department of Surgery, Charité-Campus Virchow, Humbold University, Berlin - Germany
| | - R. Rossaint
- Department of Anaesthesiology, Rheinisch-Westfälische Technische Hochschule, Aachen - Germany
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6
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Hickey RD, Mao SA, Glorioso J, Elgilani F, Amiot B, Chen H, Rinaldo P, Marler R, Jiang H, DeGrado TR, Suksanpaisan L, O'Connor MK, Freeman BL, Ibrahim SH, Peng KW, Harding CO, Ho CS, Grompe M, Ikeda Y, Lillegard JB, Russell SJ, Nyberg SL. Curative ex vivo liver-directed gene therapy in a pig model of hereditary tyrosinemia type 1. Sci Transl Med 2017; 8:349ra99. [PMID: 27464750 DOI: 10.1126/scitranslmed.aaf3838] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 07/05/2016] [Indexed: 12/23/2022]
Abstract
We tested the hypothesis that ex vivo hepatocyte gene therapy can correct the metabolic disorder in fumarylacetoacetate hydrolase-deficient (Fah(-/-)) pigs, a large animal model of hereditary tyrosinemia type 1 (HT1). Recipient Fah(-/-) pigs underwent partial liver resection and hepatocyte isolation by collagenase digestion. Hepatocytes were transduced with one or both of the lentiviral vectors expressing the therapeutic Fah and the reporter sodium-iodide symporter (Nis) genes under control of the thyroxine-binding globulin promoter. Pigs received autologous transplants of hepatocytes by portal vein infusion. After transplantation, the protective drug 2-(2-nitro-4-trifluoromethylbenzyol)-1,3 cyclohexanedione (NTBC) was withheld from recipient pigs to provide a selective advantage for expansion of corrected FAH(+) cells. Proliferation of transplanted cells, assessed by both immunohistochemistry and noninvasive positron emission tomography imaging of NIS-labeled cells, demonstrated near-complete liver repopulation by gene-corrected cells. Tyrosine and succinylacetone levels improved to within normal range, demonstrating complete correction of tyrosine metabolism. In addition, repopulation of the Fah(-/-) liver with transplanted cells inhibited the onset of severe fibrosis, a characteristic of nontransplanted Fah(-/-) pigs. This study demonstrates correction of disease in a pig model of metabolic liver disease by ex vivo gene therapy. To date, ex vivo gene therapy has only been successful in small animal models. We conclude that further exploration of ex vivo hepatocyte genetic correction is warranted for clinical use.
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Affiliation(s)
- Raymond D Hickey
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA. Department of Molecular Medicine, Mayo Clinic, Rochester, MN 55905, USA.
| | - Shennen A Mao
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Jaime Glorioso
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Faysal Elgilani
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Bruce Amiot
- Brami Biomedical Inc., Coon Rapids, MN 55433, USA
| | - Harvey Chen
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Piero Rinaldo
- Division of Laboratory Genetics, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA
| | - Ronald Marler
- Department of Comparative Medicine, Mayo Clinic, Scottsdale, AZ 85259, USA
| | - Huailei Jiang
- Department of Radiology, Mayo Clinic, Rochester, MN 55905, USA
| | | | - Lukkana Suksanpaisan
- Department of Radiology, Mayo Clinic, Rochester, MN 55905, USA. Imanis Life Sciences, Rochester, MN 55902, USA
| | | | - Brittany L Freeman
- Division of Pediatric Gastroenterology, Mayo Clinic, Rochester, MN 55905, USA
| | - Samar H Ibrahim
- Division of Pediatric Gastroenterology, Mayo Clinic, Rochester, MN 55905, USA
| | - Kah Whye Peng
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Cary O Harding
- Department of Molecular and Medical Genetics and Department of Pediatrics, Oregon Health and Science University, Portland, OR 97239, USA
| | - Chak-Sum Ho
- Histocompatibility Laboratory, Gift of Life Michigan, Ann Arbor, MI 48108, USA
| | - Markus Grompe
- Papé Family Pediatric Research Institute, Oregon Health and Science University, Portland, OR 97239, USA
| | - Yasuhiro Ikeda
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Joseph B Lillegard
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA. Midwest Fetal Care Center, Children's Hospitals and Clinics of Minnesota, Minneapolis, MN 55404, USA
| | - Stephen J Russell
- Department of Molecular Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Scott L Nyberg
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA
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7
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Sarkis R, Honiger J, Chafai N, Baudrimont M, Sarkis K, Delelo R, Becquemont L, Benoist S, Balladur P, Capeau J, Nordlinger B. Semiautomatic Macroencapsulation of Fresh or Cryopreserved Porcine Hepatocytes Maintain Their Ability for Treatment of Acute Liver Failure. Cell Transplant 2017. [DOI: 10.3727/000000001783986314] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- R. Sarkis
- Research Unit 402, INSERM, Paris, France
- Departments of Surgery, Hôpital Saint-Antoine, Paris, France
| | - J. Honiger
- Research Unit 402, INSERM, Paris, France
| | - N. Chafai
- Research Unit 402, INSERM, Paris, France
| | - M. Baudrimont
- Departments of Pathology, Hôpital Saint-Antoine, Paris, France
| | - K. Sarkis
- Research Unit 402, INSERM, Paris, France
| | - R. Delelo
- Research Unit 402, INSERM, Paris, France
| | - L. Becquemont
- Departments of Pharmacology, Hôpital Saint-Antoine, Paris, France
| | - S. Benoist
- Research Unit 402, INSERM, Paris, France
- Department of Surgery, Hôpital Ambroise Paré Boulogne-Billancourt, France
| | - P. Balladur
- Research Unit 402, INSERM, Paris, France
- Departments of Surgery, Hôpital Saint-Antoine, Paris, France
| | - J. Capeau
- Research Unit 402, INSERM, Paris, France
| | - B. Nordlinger
- Research Unit 402, INSERM, Paris, France
- Department of Surgery, Hôpital Ambroise Paré Boulogne-Billancourt, France
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8
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Abstract
The cellular response of isolated hepatocytes from pigs, humans, and human hepatoblastoma cells to freezing was characterized using cryomicroscopy and analyzed using a thermodynamic model for water transport and Intracellular Ice Formation (IIF). The value for the reference permeability, Lpg, was found to be 5.8(10)-13, 1.62(10)13, and 2.7(10)-14 m/Ns for pig, human, and Hep G2/C3A cells, respectively. The activation energy, Elp, was found to be 480 kJ/mol for pig hepatocytes, 216 kJ/mol for human, and 121 kJ/mol for Hep G2/C3A cells. The average temperature at which IIF (TavgIIF) occurs was calculated to be -7.24 + 2.3°C for pig hepatocytes, -8.5 + 2.6°C for human hepatocytes, and -9.6 + 4.5°C for Hep G2/C3A cells. These results indicate that the freezing characteristics of pig and human cells are distinct and that the specific freezing characteristics need to be understood for the development of appropriate freezing protocols.
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Affiliation(s)
- T B Darr
- Biomedical Engineering Center, University of Minnesota, Minneapolis 55455, USA
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9
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Schreiber CA, Sakuma T, Izumiya Y, Holditch SJ, Hickey RD, Bressin RK, Basu U, Koide K, Asokan A, Ikeda Y. An siRNA Screen Identifies the U2 snRNP Spliceosome as a Host Restriction Factor for Recombinant Adeno-associated Viruses. PLoS Pathog 2015; 11:e1005082. [PMID: 26244496 PMCID: PMC4526370 DOI: 10.1371/journal.ppat.1005082] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 07/13/2015] [Indexed: 12/02/2022] Open
Abstract
Adeno-associated viruses (AAV) have evolved to exploit the dynamic reorganization of host cell machinery during co-infection by adenoviruses and other helper viruses. In the absence of helper viruses, host factors such as the proteasome and DNA damage response machinery have been shown to effectively inhibit AAV transduction by restricting processes ranging from nuclear entry to second-strand DNA synthesis. To identify host factors that might affect other key steps in AAV infection, we screened an siRNA library that revealed several candidate genes including the PHD finger-like domain protein 5A (PHF5A), a U2 snRNP-associated protein. Disruption of PHF5A expression selectively enhanced transgene expression from AAV by increasing transcript levels and appears to influence a step after second-strand synthesis in a serotype and cell type-independent manner. Genetic disruption of U2 snRNP and associated proteins, such as SF3B1 and U2AF1, also increased expression from AAV vector, suggesting the critical role of U2 snRNP spliceosome complex in this host-mediated restriction. Notably, adenoviral co-infection and U2 snRNP inhibition appeared to target a common pathway in increasing expression from AAV vectors. Moreover, pharmacological inhibition of U2 snRNP by meayamycin B, a potent SF3B1 inhibitor, substantially enhanced AAV vector transduction of clinically relevant cell types. Further analysis suggested that U2 snRNP proteins suppress AAV vector transgene expression through direct recognition of intact AAV capsids. In summary, we identify U2 snRNP and associated splicing factors, which are known to be affected during adenoviral infection, as novel host restriction factors that effectively limit AAV transgene expression. Concurrently, we postulate that pharmacological/genetic manipulation of components of the spliceosomal machinery might enable more effective gene transfer modalities with recombinant AAV vectors. Mammalian cells have developed diverse innate/intrinsic immune strategies to counteract viral infections. Post-entry infection steps of a single-strand DNA virus, adeno-associated virus (AAV), are subject to such restrictions. Here, we screened an siRNA library to identify a novel cellular factor involved in AAV restriction. We found PHF5A, a component of the U2 snRNP mRNA splicing factor, blocks expression from recombinant AAV vectors. Disruption of PHF5A expression specifically enhanced AAV vector performance. Moreover, genetic and pharmacological inhibition of other U2 snRNP proteins, but not spliceosome proteins involved in other splicing steps, strongly increased transgene expression from AAV vectors. Further study demonstrated that U2 snRNP proteins recognize incoming AAV capsids to mediate this cellular restriction at the step after second-strand synthesis. In summary, we identify the U2 snRNP spliceosome complex as novel host factors that effectively restrict recombinant AAV vectors. Considering frequent reorganization of host splicing machinery in DNA virus infections, it is conceivable that U2 snRNP plays a role as a broad spectrum antiviral factor and helper viruses have evolved to counteract this restriction through sequestration of snRNP proteins.
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Affiliation(s)
- Claire A. Schreiber
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Toshie Sakuma
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Yoshihiro Izumiya
- Department of Dermatology, UC Davis School of Medicine, Sacramento, California, United States of America
| | - Sara J. Holditch
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Raymond D. Hickey
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
| | - Robert K. Bressin
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Upamanyu Basu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Kazunori Koide
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Aravind Asokan
- Gene Therapy Center and Department of Genetics, University of North Carolina School of Medicine, Chapel Hill, North Carolina, United States of America
| | - Yasuhiro Ikeda
- Department of Molecular Medicine, Mayo Clinic, Rochester, Minnesota, United States of America
- * E-mail:
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10
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Glorioso JM, Mao SA, Rodysill B, Mounajjed T, Kremers WK, Elgilani F, Hickey RD, Haugaa H, Rose CF, Amiot B, Nyberg SL. Pivotal preclinical trial of the spheroid reservoir bioartificial liver. J Hepatol 2015; 63:388-98. [PMID: 25817557 PMCID: PMC4508211 DOI: 10.1016/j.jhep.2015.03.021] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 03/13/2015] [Accepted: 03/19/2015] [Indexed: 02/08/2023]
Abstract
BACKGROUND & AIMS The neuroprotective effect of the spheroid reservoir bioartificial liver (SRBAL) was evaluated in a porcine model of drug-overdose acute liver failure (ALF). METHODS Healthy pigs were randomized into three groups (standard therapy (ST) alone, ST+No-cell device, ST+SRBAL device) before placement of an implantable intracranial pressure (ICP) monitor and a tunneled central venous catheter. One week later, pigs received bolus infusion of the hepatotoxin D-galactosamine and were followed for up to 90h. RESULTS At 48h, all animals had developed encephalopathy and biochemical changes confirming ALF; extracorporeal treatment was initiated and pigs were observed up to 90h after drug infusion. Pigs treated with the SRBAL, loaded with porcine hepatocyte spheroids, had improved survival (83%, n=6) compared to ST alone (0%, n=6, p=0.003) and No-cell device therapy (17%, n=6, p=0.02). Ammonia detoxification, peak levels of serum ammonia and peak ICP, and pig survival were influenced by hepatocyte cell dose, membrane pore size and duration of SRBAL treatment. Hepatocyte spheroids remained highly functional with no decline in mean oxygen consumption from initiation to completion of treatment. CONCLUSIONS The SRBAL improved survival in an allogeneic model of drug-overdose ALF. Survival correlated with ammonia detoxification and ICP lowering indicating that hepatocyte spheroids prevented the cerebral manifestations of ALF (brain swelling, herniation, death). Further investigation of SRBAL therapy in a clinical setting is warranted.
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Affiliation(s)
| | - S. A. Mao
- Department of Surgery, Mayo Clinic, Rochester, MN, USA
| | - B. Rodysill
- Department of Surgery, Mayo Clinic, Rochester, MN, USA
| | - T. Mounajjed
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - W. K. Kremers
- Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA,William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN, USA
| | - F. Elgilani
- William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN, USA
| | - R. D. Hickey
- William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN, USA,Department of Molecular Medicine, Mayo Clinic, Rochester, MN, USA
| | - H. Haugaa
- Department of Emergencies and Critical Care, Oslo University Hospital, Oslo, Norway,Institute of Clinical Medicine, University of Oslo
| | - C. F. Rose
- Hepato-Neuro Laboratory, CRCHUM, Universite de Montreal, Quebec, Canada
| | - B. Amiot
- Brami Biomedical, Inc. Minneapolis, MN, USA
| | - S. L. Nyberg
- Department of Surgery, Mayo Clinic, Rochester, MN, USA,William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, Rochester, MN, USA,Corresponding address: Scott L. Nyberg, MD, PhD, William J. von Liebig Center for Transplantation and Clinical Regeneration, Mayo Clinic, 200 First Street, Rochester, MN 55905
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11
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D’Alvise J, Mortensen R, Hansen SH, Janfelt C. Detection of follicular transport of lidocaine and metabolism in adipose tissue in pig ear skin by DESI mass spectrometry imaging. Anal Bioanal Chem 2014; 406:3735-42. [DOI: 10.1007/s00216-014-7802-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 03/25/2014] [Accepted: 03/28/2014] [Indexed: 10/25/2022]
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12
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Nelson LJ, Treskes P, Howie AF, Walker SW, Hayes PC, Plevris JN. Profiling the impact of medium formulation on morphology and functionality of primary hepatocytes in vitro. Sci Rep 2013; 3:2735. [PMID: 24061220 PMCID: PMC3781401 DOI: 10.1038/srep02735] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 09/03/2013] [Indexed: 12/28/2022] Open
Abstract
The characterization of fully-defined in vitro hepatic culture systems requires testing of functional and morphological variables to obtain the optimal trophic support, particularly for cell therapeutics including bioartificial liver systems (BALs). Using serum-free fully-defined culture medium formulations, we measured synthetic, detoxification and metabolic variables of primary porcine hepatocytes (PPHs)--integrated these datasets using a defined scoring system and correlated this hepatocyte biological activity index (HBAI) with morphological parameters. Hepatic-specific functions exceeded those of both primary human hepatocytes (PHHs) and HepaRG cells, whilst retaining biotransformation potential and in vivo-like ultrastructural morphology, suggesting PPHs as a potential surrogate for PHHs in various biotech applications. The HBAI permits assessment of global functional capacity allowing the rational choice of optimal trophic support for a defined operational task (including BALs, hepatocellular transplantation, and cytochrome P450 (CYP450) drug metabolism studies), mitigates risk associated with sub-optimal culture systems, and reduces time and cost of research and therapeutic applications.
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Affiliation(s)
- Leonard J. Nelson
- Hepatology Laboratory, University of Edinburgh, Chancellor's Building, Royal Infirmary of Edinburgh, EH16 4SB, Scotland, UK
| | - Philipp Treskes
- Hepatology Laboratory, University of Edinburgh, Chancellor's Building, Royal Infirmary of Edinburgh, EH16 4SB, Scotland, UK
| | - A. Forbes Howie
- Dept of Clinical Biochemistry, University of Edinburgh, Chancellor's Building, Royal Infirmary of Edinburgh, EH16 4SB, Scotland, UK
| | - Simon W. Walker
- Dept of Clinical Biochemistry, University of Edinburgh, Chancellor's Building, Royal Infirmary of Edinburgh, EH16 4SB, Scotland, UK
| | - Peter C. Hayes
- Hepatology Laboratory, University of Edinburgh, Chancellor's Building, Royal Infirmary of Edinburgh, EH16 4SB, Scotland, UK
| | - John N. Plevris
- Hepatology Laboratory, University of Edinburgh, Chancellor's Building, Royal Infirmary of Edinburgh, EH16 4SB, Scotland, UK
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13
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Wu FJ, Friend JR, Lazar A, Mann HJ, Remmel RP, Cerra FB, Hu WS. Hollow fiber bioartificial liver utilizing collagen-entrapped porcine hepatocyte spheroids. Biotechnol Bioeng 2012; 52:34-44. [PMID: 18629850 DOI: 10.1002/(sici)1097-0290(19961005)52:1<34::aid-bit4>3.0.co;2-#] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A xenogeneic hollow fiber bioreactor utilizing collagen-entrapped dispersed hepatocytes has been developed as an extracorporeal bioartificial liver (BAL) for potential treatment of acute human fulminant hepatitis. Prolonged viability, enhanced liver-specific functions, and differentiated state have been observed in primary porcine hepatocytes cultivated as spheroids compared to dispersed hepatocytes plated on a monolayer. Entrapment of spheroids into the BAL can potentially improve performance over the existing device. Therefore, studies were conducted to evaluate the feasibility of utilizing spheroids as the functionally active component of our hybrid device. Confocal microscopy indicated high viability of spheroids entrapped into cylindrical collagen gel. Entrapment of spheroids alone into collagen gel showed reduced ability to contract collagen gel. By mixing spheroids with dispersed cells, the extent of collagen gel contraction was increased. Hepatocyte spheroids collagen-entrapped into BAL devices were maintained for over 9 days. Assessment of albumin synthesis and ureagenesis within a spheroid-entrapment BAL indicated higher or at least as high activity on a per-cell basis compared to a dispersed hepatocyte-entrapment BAL device. Clearance of 4-methylumbelliferone to its glucuronide was detected throughout the culture period as a marker of phase II conjugation activity. A spheroid-entrapment bioartificial liver warrants further studies for potential human therapy. (c) 1996 John Wiley & Sons, Inc.
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Affiliation(s)
- F J Wu
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Ave. S.E., Minneapolis, Minnesota 55455
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14
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Hu WS, Friend JR, Wu FJ, Sielaff T, Peshwa MV, Lazar A, Nyberg SL, Remmel RP, Cerra FB. Development of a bioartificial liver employing xenogeneic hepatocytes. Cytotechnology 2012; 23:29-38. [PMID: 22358518 DOI: 10.1023/a:1007906512616] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Liver failure is a major cause of mortality. A bioartificial liver (BAL) employing isolated hepatocytes can potentially provide temporary support for liver failure patients. We have developed a bioartificial liver by entrapping hepatocytes in collagen loaded in the luminal side of a hollow fiber bioreactor. In the first phase of development, liver-specific metabolic activities of biosynthesis, biotransformation and conjugation were demonstrated. Subsequently anhepatic rabbits were used to show that rat hepatocytes continued to function after the BAL was linked to the test animal. For scale-up studies, a canine liver failure model was developed using D-galactosamine overdose. In order to secure a sufficient number of hepatocytes for large animal treatment, a collagenase perfusion protocol was established for harvesting porcine hepatocytes at high yield and viability. An instrumented bioreactor system, which included dissolved oxygen measurement, pH control, flow rate control, an oxygenator and two hollow fiber bioreactors in series, was used for these studies. An improved survival of dogs treated with the BAL was shown over the controls. In anticipated clinical applications, it is desirable to have the liver-specific activities in the BAL as high as possible. To that end, the possibility of employing hepatocyte spheroids was explored. These self-assembled spheroids formed from monolayer culture exhibited higher liver-specific functions and remained viable longer than hepatocytes in a monolayer. To ease the surface requirement for large-scale preparation of hepatocyte spheroids, we succeeded in inducing spheroid formation in stirred tank bioreactors for both rat and porcine hepatocytes. These spheroids formed in stirred tanks were shown to be morphologically and functionally indistinguishable from those formed from a monolayer. Collagen entrapment of these spheroids resulted in sustaining their liver-specific functions at higher levels even longer than those of spheroids maintained in suspension. For use in the BAL, a mixture of spheroids and dispersed hepatocytes was used to ensure a proper degree of collagen gel contraction. This mixture of spheroids and dispersed cells entrapped in the BAL was shown to sustain the high level of liver-specific functions. The possibility of employing such a BAL for improved clinical performance warrants further investigations.
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Affiliation(s)
- W S Hu
- Departments of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, 55455-0132
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15
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Nakazawa K, Mizumoto H, Kaneko M, Ijima H, Gion T, Shimada M, Shirabe K, Takenaka K, Sugimachi K, Funatsu K. Formation of porcine hepatocyte spherical multicellular aggregates (spheroids) and analysis of drug metabolic functions. Cytotechnology 2012; 31:61-8. [PMID: 19003125 DOI: 10.1023/a:1008040726236] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Porcine hepatocytes are used in the hybrid artificial liver support system that we are developing because of their high level of liver functions in vitro and because human hepatocytes can not be used in Japan for ethical reasons. Spherical multicellular aggregates or spheroids have been found to be effective in vitro for long-term maintenance of liver functions. Therefore, we formed spherical multicellular aggregates (spheroids) of primary porcine hepatocytes using a polyurethane foam (PUF) as a culture substratum and analyzed their drug metabolic functions in vitro. Primary porcine hepatocytes inoculated into the pores of a flat PUF plate (25 x 25 x 1 mm), spontaneously formed spheroids within the range of 100 to 150 mum in diameter 24 to 36 h after inoculation. The formed spheroids were attached to the bottom surface of the PUF pores, and their morphology and viability were maintained for more than 12 days. The P-450 activity in the spheroids of porcine hepatocytes was demonstrated by detecting production of monoethylglycinexylidide from lidocaine. In addition, the conjugation enzyme activity was demonstrated by detecting glucuronidation and sulfation of acetaminophen. These activities were maintained for 12 days at a level twice as high as in the monolayer culture. This result shows that the porcine hepatocyte spheroids formed by using PUF can maintain the drug metabolic functions important in a hybrid artificial liver device. Consequently, culturing porcine hepatocyte spheroids using PUF seems to be promising for development of a hybrid artificial liver.
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16
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Krishnan A, Viker K, Rietema H, Telgenkamp M, Knudsen B, Charlton M. Prolonged engraftment of human hepatocytes in mice transgenic for the deleted form of human hepatocyte growth factor. Hepatol Res 2007; 37:854-62. [PMID: 17573952 DOI: 10.1111/j.1872-034x.2007.00139.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
AIM Small animal models chimeric for human hepatocytes have provided valuable insights into the biology of hepatotropic viral infection and provided a platform for the study of therapeutic agents. Existing models of human hepatocyte transplantation are limited by phenotypic fragility and impaired immunity. We hypothesized that mice transgenic for human hepatocyte growth factor (HGF), a potent human hepatocyte mitogen, would engraft human hepatocytes in the absence of immunodeficiency. METHODS A plasmid construct containing the 2.3 kb coding region of the 723 amino acid isoform of HGF cDNA under the transcriptional control of the mouse albumin promoter/enhancer was used to generate transgenic mice. Cryopreserved human hepatocytes were transplanted into nine transgenic and six non-transgenic mice. Engraftment of human hepatocytes was followed for a period of 12 weeks by immunoblotting for human albumin in mouse serum samples. RESULTS In six out of the nine transgenic mice, abundance of human albumin, following an initial decline, increased andpeaked at > 70 days post transplantation, demonstrating sustained engraftment of transplanted human hepatocytes. In all the non-transgenic mice, post-transplant human albumin levels declined sequentially without evidence of sustained engraftment. Immunostaining of mouse liver sections indicated the presence of human hepatocytes adjacent to clusters of non-staining murine hepatocytes. CONCLUSION These results demonstrate that sustained engraftment of human hepatocytes in mice is facilitated by expression of the human dHGF transgene. Human hepatocyte engraftment in this model has been achieved on an immunocompetent strain background and merits further study as a candidate for the study of hepatotropic viral infections.
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17
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Schmitmeier S, Langsch A, Jasmund I, Bader A. Development and characterization of a small-scale bioreactor based on a bioartificial hepatic culture model for predictive pharmacological in vitro screenings. Biotechnol Bioeng 2007; 95:1198-206. [PMID: 16807928 DOI: 10.1002/bit.21089] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
A vast majority of pharmacons are beset by possible interactions and side effects which have usually been tested in laboratory animals. However, better methods are needed to reduce the number of animal experiments and interspecies differences with respect to drug metabolism, as well as to provide a faster and more cost-effective way of analysis. These facts have led to the development of in vitro models based on isolated primary hepatocytes to better assess drug metabolism, interactions, and toxicity. A new small-scale bioreactor with the hepatic sandwich model and a gas-permeable membrane at the bottom allowing a definable oxygen exchange, has been constructed and compared with the conventional well plates. Compared to hepatocytes cultured in conventional systems, the cells exhibited a stronger liver-specific capacity and remained in a differentiated state in the small-scale bioreactor over a cultivation period of 17 days. This in vitro model could serve as a tool to predict the liver response to newly developed drugs.
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Affiliation(s)
- Stephanie Schmitmeier
- Biotechnological-Biomedical Center, Cell Techniques and Applied Stem Cell Biology, University of Leipzig, Deutscher Platz 5, 04103 Leipzig, Germany.
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18
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Diekmann S, Bader A, Schmitmeier S. Present and Future Developments in Hepatic Tissue Engineering for Liver Support Systems : State of the art and future developments of hepatic cell culture techniques for the use in liver support systems. Cytotechnology 2006; 50:163-79. [PMID: 19003077 PMCID: PMC3476010 DOI: 10.1007/s10616-006-6336-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2006] [Accepted: 01/03/2006] [Indexed: 12/23/2022] Open
Abstract
The liver is the most important organ for the biotransformation of xenobiotics, and the failure to treat acute or acute-on-chronic liver failure causes high mortality rates in affected patients. Due to the lack of donor livers and the limited possibility of the clinical management there has been growing interest in the development of extracorporeal liver support systems as a bridge to liver transplantation or to support recovery during hepatic failure. Earlier attempts to provide liver support comprised non-biological therapies based on the use of conventional detoxification procedures, such as filtration and dialysis. These techniques, however, failed to meet the expected efficacy in terms of the overall survival rate due to the inadequate support of several essential liver-specific functions. For this reason, several bioartificial liver support systems using isolated viable hepatocytes have been constructed to improve the outcome of treatment for patients with fulminant liver failure by delivering essential hepatic functions. However, controlled trials (phase I/II) with these systems have shown no significant survival benefits despite the systems' contribution to improvements in clinical and biochemical parameters. For the development of improved liver support systems, critical issues, such as the cell source and culture conditions for the long-term maintenance of liver-specific functions in vitro, are reviewed in this article. We also discuss aspects concerning the performance, biotolerance and logistics of the selected bioartificial liver support systems that have been or are currently being preclinically and clinically evaluated.
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Affiliation(s)
- Sonja Diekmann
- Center for Biotechnology and Biomedicine, Cell Techniques and Applied Stem Cell Biotechnology, University of Leipzig, Deutscher Platz 5, 04103 Leipzig, Germany
| | - Augustinus Bader
- Center for Biotechnology and Biomedicine, Cell Techniques and Applied Stem Cell Biotechnology, University of Leipzig, Deutscher Platz 5, 04103 Leipzig, Germany
| | - Stephanie Schmitmeier
- Center for Biotechnology and Biomedicine, Cell Techniques and Applied Stem Cell Biotechnology, University of Leipzig, Deutscher Platz 5, 04103 Leipzig, Germany
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19
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Nyberg SL, Hardin J, Amiot B, Argikar UA, Remmel RP, Rinaldo P. Rapid, large-scale formation of porcine hepatocyte spheroids in a novel spheroid reservoir bioartificial liver. Liver Transpl 2005; 11:901-10. [PMID: 16035089 DOI: 10.1002/lt.20446] [Citation(s) in RCA: 113] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We have developed a novel bioreactor based on the observation that isolated porcine hepatocytes rapidly and spontaneously aggregate into spheroids under oscillation conditions. The purpose of this study was to characterize the influence of oscillation frequency (0.125 Hz, 0.25 Hz), cell density (1-10 x 10(6) cells/mL), and storage condition (fresh, cryopreserved) of porcine hepatocytes on the kinetics of spheroid formation. The viability and metabolic performance of spheroid hepatocytes was also compared to monolayer culture. We observed that both fresh and cryopreserved porcine hepatocytes began formation of spheroids spontaneously at the onset of oscillation culture. Spheroid size was directly related to cell density and time in culture, though inversely related to oscillatory frequency. Spheroid formation by fresh porcine hepatocytes was associated with decreased cell death (lactate dehydrogenase release, 1.3 +/- 1.0 vs. 3.1 +/- 0.7 U/mL, P < 0.05) and increased metabolic performance (albumin production, 14.7 +/- 3.3 vs. 4.6 +/- 1.4 fg/c/h, P < 0.0001; ureagenesis from ammonia, 267 +/- 63 vs. 92 +/- 13 micromol/L/h, P < 0.001) compared with monolayer culture. In conclusion, based on the favorable properties of rapid spheroid formation, increased hepatocellular function, and ease of scale-up, the spheroid reservoir bioreactor warrants further investigation as a bioartificial liver for support of liver failure.
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Affiliation(s)
- Scott L Nyberg
- Department of Surgery, Mayo Clinic, Rochester, MN 55905, USA.
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20
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Hochleitner B, Hengster P, Duo L, Bucher H, Klima G, Margreiter R. A novel bioartificial liver with culture of porcine hepatocyte aggregates under simulated microgravity. Artif Organs 2005; 29:58-66. [PMID: 15644085 DOI: 10.1111/j.1525-1594.2004.29014.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
An extracorporeal bioartificial liver device could provide vital support to patients suffering from acute liver failure. We designed a novel, customized bioreactor for use as a bioartificial liver (patent pending). The Innsbruck Bioartificial Liver (IBAL) contains aggregates of porcine hepatocytes grown under simulated microgravity. The culture vessel rotates around its longitudinal axis and is perfused by two independent circuits. The circuit responsible for exchange of plasma components with the patient consists of a dialysis tube winding spirally around the internal wall of the culture vessel. IBAL was evaluated in vitro. Viability tests showed sufficient viability of hepatocytes for up to 10 days. Cytologic examination of samples from the bioreactor showed liver cell aggregates. These were also examined by electron microscopy. A number of biochemical parameters were analyzed. In conclusion, cell culture is possible for at least 10 days in the IBAL system, organoid hepatocyte aggregates are formed and synthetic activity of the hepatocytes was demonstrated.
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Affiliation(s)
- Boris Hochleitner
- Department of General and Transplant Surgery, Innsbruck University Hospital, Innsbruck, Austria.
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21
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Nyberg SL, Amiot B, Hardin J, Baskin-Bey E, Platt JL. Cytotoxic immune response to a xenogeneic bioartificial liver. Cell Transplant 2005; 13:783-91. [PMID: 15690980 DOI: 10.3727/000000004783983378] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Prior studies have suggested the possibility of immune-mediated death of xenogeneic hepatocytes in a bioartificial liver (BAL) during hemoperfusion. This study was designed to elucidate how immunity may cause death of xenogeneic hepatocytes in the BAL. Healthy dogs were treated with a BAL containing hollow fiber membranes with large pores (200 nm) or small pores (400 kDa). The immune response of recipient dogs to BAL therapy was monitored over 3 h of treatment. We observed significantly greater loss of viability of hepatocytes in the 200 nm group compared with the 400 kDa group (p < 0.001). Low viability after treatment with the large pore membrane was associated with positive staining for dog IgG, dog IgM, and dog complement on dead hepatocytes. Significant levels of dog antibody were detected in samples of BAL medium from the 200 nm group. These canine antibodies were cytotoxic to porcine hepatocytes. In contrast, medium from the 400 kDa group contained only trace levels of dog IgG and were noncytotoxic. We conclude that antibody-mediated cytotoxicity contributed to the death of hepatocytes during treatment with a xenogeneic BAL. Immune-mediated death of hepatocytes was reduced by increasing selectivity of the BAL membrane.
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Affiliation(s)
- Scott L Nyberg
- Division of Solid Organ Transplantation, Transplantation Biology Program, Mayo Clinic, Rochester, MN 55905, USA.
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22
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Nishitai R, Koch CA, Ogata K, Knudsen BE, Plummer TB, Butters KA, Platt JL. Toward the survival and function of xenogeneic hepatocyte grafts. Liver Transpl 2005; 11:39-50. [PMID: 15690535 DOI: 10.1002/lt.20305] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Xenogeneic hepatocyte transplantation might offer an unobtrusive alternative to whole liver allotransplantation. Having previously found that the immune response to such grafts can be controlled by immunosuppression, we sought approaches to collection and delivery that would optimize survival and function after transplantation. Porcine hepatocytes were isolated by a 2-step collagenase technique and then: 1) used immediately; 2) stored in University of Wisconsin (UW) solution at 4 degrees C; 3) cultured in supplemented Williams E medium; or 4) cryopreserved in UW solution with 10% dimethyl sulfoxide (DMSO). The fate and function of the hepatocytes was determined after they were injected into the spleens of immunodeficient mice. Freshly isolated hepatocytes had better viability (92.2 +/- 1.9%) than hepatocytes cultured for 24 hours (78.4 +/- 6.3%), hypothermically preserved in UW solution for 24 hours (85.8 +/- 3.1%), or cryopreserved (65.0 +/- 2.6%). Freshly isolated hepatocytes secreted more albumin after transplantation than hepatocytes that were cultured, hypothermically stored, or cryopreserved. In conclusion, culture and storage profoundly compromises the function of isolated hepatocytes after transplantation. Freshly isolated hepatocytes are the preferred source for transplantation.
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Affiliation(s)
- Ryuta Nishitai
- Transplantation Biology Program, Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN 55905, USA
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Frühauf NR, Oldhafer KJ, Westermann S, Sotiropoulos GC, Kaiser GM. Acute hepatic failure in swine: hepatectomy versus vascular occlusion. J INVEST SURG 2004; 17:163-71. [PMID: 15204960 DOI: 10.1080/08941930490446955] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The two most promising surgical animal models of fulminant hepatic failure (FHF) for investigation of the safety and efficacy of new treatment modalities were analyzed in a porcine study. Animals underwent total hepatectomy or devascularization of hepatic artery and portal vein followed by portocaval (PC) shunting. Survival time, technical feasibility, safety, and reproducibility of the models were investigated. Devascularization seems to be most useful for studying the development and treatment of FHF caused by ischemia and its side effects. Total hepatectomy is superior for investigation of the anhepatic status and treatment of FHF by bioartifical liver support systems.
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Affiliation(s)
- Nils R Frühauf
- Department of General and Transplantation Surgery, University of Essen, Essen, Germany
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Matsushita T, Yagi T, Hardin JA, Cragun JD, Crow FW, Bergen HR, Gores GJ, Nyberg SL. Apoptotic cell death and function of cryopreserved porcine hepatocytes in a bioartificial liver. Cell Transplant 2004; 12:109-21. [PMID: 12797372 DOI: 10.3727/000000003108746696] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
We have previously shown that cryopreservation leads to increased apoptotic death of porcine hepatocytes intended for use in a bioartificial liver (BAL). This study was designed to determine if a broad-spectrum caspase inhibitor, IDN-1965, reduced apoptosis and increased function of cryopreserved porcine hepatocytes in static culture or in a BAL. Porcine hepatocytes were studied immediately after isolation and after 2 weeks of cryopreservation in liquid nitrogen using medium supplemented with 25 micromol/L IDN-1965 or vehicle. Both apoptotic and necrotic cells were observed in cultures of fresh and cryopreserved hepatocytes, but the percentage of apoptotic cells increased after cryopreservation. Cryopreservation in IDN-1965 improved hepatocyte viability and reduced apoptotic cell death determined by TUNEL assay. Cryopreservation of hepatocytes in IDN-1965 was also associated with reduced caspase 3-like activity, decreased release of cytochrome c from mitochondria, and a slower decline in mitochondrial membrane potential after thawing. These markers of apoptosis were lowest after cryopreservation when IDN-1965 was added to both the culture and cryopreservation medium. Functional markers of hepatocyte activity (albumin production, diazepam metabolism, urea production) were also increased after cryopreservation and culture of hepatocytes in medium supplemented with 25 micromol/L IDN-1965. Cryopreservation of porcine hepatocytes in the presence of caspase inhibitor IDN-1965 was associated with reduced apoptosis and improved function of porcine hepatocytes in both static culture and a perfused BAL. These data demonstrate that inhibition of apoptosis also preserves cell function.
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Matsushita T, Amiot B, Hardin J, Platt JL, Nyberg SL. Membrane pore size impacts performance of a xenogeneic bioartificial liver1. Transplantation 2003; 76:1299-305. [PMID: 14627907 DOI: 10.1097/01.tp.0000080067.79190.3c] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
BACKGROUND We have developed a novel bioartificial liver (BAL) composed of porcine hepatocyte spheroids in a reservoir design. A semipermeable membrane is used to protect the spheroids from immune-mediated damage. This study was designed to assess the influence of membrane pore size on performance of the spheroid reservoir BAL. METHODS Eight healthy dogs were studied during primary and secondary exposures to the spheroid reservoir BAL using membranes with small (10 nm) or large (200 nm) pores. BAL performance was assessed by multiple functional assays. Spheroids were examined microscopically before and after all BAL treatments. Titers of xenoreactive antibody were monitored until elective death of animals on day 42. RESULTS Viability and functional performance of spheroids were significantly greater after all BAL treatments that used membranes with 10-nm versus 200-nm pores. Reduced performance in the 200 nm group was associated with 7.7-fold and 78.0-fold rise in xenoreactive antibody titers after first and second treatments, respectively. Dogs in the 10 nm group remained hemodynamically stable during all BAL treatments, whereas those in the 200 nm group experienced acute hypotension (P<0.001) during second BAL exposures. Microscopic examination of spheroids after BAL treatments indicated that deposition of canine proteins, including complement, was associated with reductions in both viability and functional performance of the BAL. CONCLUSIONS The elicited immune response of healthy dogs to a xenogeneic BAL was blocked and BAL performance significantly improved by reducing the permeability of the BAL membrane.
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Affiliation(s)
- Takakazu Matsushita
- Division of Solid Organ Transplantation, Division of Biochemistry and Molecular Biology, Transplantation Biology Program, Mayo Clinic, Rochester, MN, USA
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Effect of low temperature preservation and cell density on metabolic function in a bioartificial liver. BIOTECHNOL BIOPROC E 2003. [DOI: 10.1007/bf02932897] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Tzanakakis ES, Hess DJ, Sielaff TD, Hu WS. Extracorporeal tissue engineered liver-assist devices. Annu Rev Biomed Eng 2002; 2:607-32. [PMID: 11701525 DOI: 10.1146/annurev.bioeng.2.1.607] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The treatment of acute liver failure has evolved to the current concept of hybrid bioartificial liver (BAL) support, because wholly artificial systems have not proved efficacious. BAL devices are still in their infancy. The properties that these devices must possess are unclear because of our lack of understanding of the pathophysiology of liver failure. The considerations that attend the development of BAL devices are herein reviewed. These considerations include choice of cellular component, choice of membrane component, and choice of BAL system configuration. Mass transfer efficiency plays a role in the design of BAL devices, but the complexity of the systems renders detailed mass transfer analysis difficult. BAL devices based on hollow-fiber bioreactors currently show the most promise, and available results are reviewed herein. BAL treatment is designed to support patients with acute liver failure until an organ becomes available for transplantation. The results obtained to date, in this relatively young field, point to a bright future. The risks of using xenogeneic treatments have yet to be defined. Finally, the experience gained from the past and current BAL systems can be used as a basis for improvement of future BAL technology.
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Affiliation(s)
- E S Tzanakakis
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, USA
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Hyon SH, Kim DH. Hibernation of mammalian cells at a living body temperature. BIOTECHNOL BIOPROC E 2001. [DOI: 10.1007/bf02931992] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Benoist S, Sarkis R, Chafaï N, Barbu V, Honiger J, Lakehal F, Becquemont L, Baudrimont M, Capeau J, Housset C, Nordlinger B. Survival and differentiation of porcine hepatocytes encapsulated by semiautomatic device and allotransplanted in large number without immunosuppression. J Hepatol 2001; 35:208-16. [PMID: 11580143 DOI: 10.1016/s0168-8278(01)00085-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND/AIMS The aim of this study was to evaluate the survival and functions of porcine hepatocytes transplanted in large quantities in the peritoneal cavity of allogeneic animals following semiautomatic encapsulation. METHODS Isolated porcine hepatocytes and a polymer solution composed of AN69 were coextruded through a double lumen spinneret. Minitubes containing hepatocytes were transplanted in the peritoneal cavity of 12 pigs (4 x 10(9) cells/animal) in the absence of immunosuppressive therapy. Seven, 15, and 21 days after transplantation, minitubes was collected and processed for analyses. The morphology was examined under light and electron microscopy. Albumin synthesis was assessed by semi-quantitative reverse transcription-polymerase chain reaction. Cytochrome P450 3A (CYP3A) gene expression was analyzed by Western blot and by testosterone 6-beta-hydroxylation assay. RESULTS The device allowed to encapsulate 55 x 10(6) hepatocytes/min. Hepatocytes exhibited normal structural and ultrastructural features up to day 21. Albumin gene expression decreased progressively between days 0 and 21. The amount of CYP3A protein and 6-beta-hydroxylase activity were approximately 2-fold lower at days 7 and 15 than in freshly encapsulated hepatocytes, and further decreased thereafter. CONCLUSIONS The preservation of hepatocyte functions during 1-2 weeks is encouraging for potential short-term use of such bioartificial liver in future clinical application.
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Affiliation(s)
- S Benoist
- Research Unit 402, INSERM, Hospital Saint-Antoine, Paris, France
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Unger JK, Kuehlein G, Schroers A, Gerlach JC, Rossaint R. Adsorption of xenobiotics to plastic tubing incorporated into dynamic in vitro systems used in pharmacological research--limits and progress. Biomaterials 2001; 22:2031-7. [PMID: 11426882 DOI: 10.1016/s0142-9612(00)00389-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Commonly used materials incorporated into dynamic culture systems typically show the feature of adsorption of lipophilic xenobiotics. Yet, this phenomenon is strongly limiting the use of dynamic culture models and ex vivo organ perfusions in pharmacological and toxicological research. The aim of the study was to characterize different materials with respect to their capacity for drug adsorption and to find methods or materials to reduce the loss of substrate by adsorption in order to improve the use of dynamic in vitro systems. The adsorption of different xenobiotics (lidocaine, midazolam, lormetazepam, phenobarbital, testosterone, ethoxyresoroufine) to tubes used in dynamic in vitro systems (polyvinyl-chloride, silicone) were investigated and compared to a new material (silicone-caoutchouc-mixture). In addition, the role of protein deposition onto the tubing was studied and it was investigated whether it was possible to reach saturation of the inner tube surface by pre-loading it with the test compound. We found that silicone tubes provided the highest comfort with respect to handling and reusability, but they also demonstrated the highest capacity for substrate adsorption. Polyvinyl-chloride was the second best in handling but also demonstrated a high complexity in its adsorption behavior. The silicone-caoutchouc-mixture reached acceptable experimental results with respect to its handling and demonstrated a very low capacity for substrate adsorption.
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Affiliation(s)
- J K Unger
- Department of Anesthesiology, University Clinic, RWTH Aachen, German.
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Benoist S, Sarkis R, Barbu V, Honiger J, Baudrimont M, Lakehal F, Becquemont L, Delelo R, Housset C, Balladur P, Capeau J, Nordlinger B. Survival and functions of encapsulated porcine hepatocytes after allotransplantation or xenotransplantation without immunosuppression. Surgery 2001; 129:606-16. [PMID: 11331453 DOI: 10.1067/msy.2001.112961] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND This study evaluated the survival and functions of encapsulated porcine hepatocytes after intraperitoneal allotransplantation and xenotransplantation without immunosuppression. METHODS Isolated porcine hepatocytes were encapsulated in AN 69 polymer capsules (45.10(6)/capsule) and transplanted intraperitoneally in 12 rats and 12 pigs. Fifteen, 30, and 60 days after transplantation, capsules were removed and the viability and morphology of explanted hepatocytes were examined under light and electronic microscopy. The potential to produce albumin was assessed by evaluating the level of albumin messenger RNA, using semiquantitative reverse transcription-polymerase chain reaction. 6beta-Hydroxylase activity was measured by high-performance liquid chromatography. In addition, cytochrome P450 3A proteins were detected by Western blot only in allogeneic hepatocytes. RESULTS Similar results were observed after allotransplantation and xenotransplantation. Histologic studies showed that hepatocytes were well-preserved and arranged in cords for up to 30 days. The expression of porcine albumin gene was maintained up to 15 days. 6beta-Hydroxylase activity was 2.5-fold lower at day 15 than in freshly encapsulated hepatocytes, which were not transplanted. In allogeneic hepatocytes, the expression of CYP 3A protein was detected up to 60 days after transplantation. CONCLUSIONS Encapsulated porcine hepatocytes remain viable and functional for at least 15 days after allotransplantation and xenotransplantation without immunosuppression. The demonstration of maintained hepatic functions in transplanted porcine hepatocytes up to 15 days is a first step toward application in the treatment of acute liver failure.
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Affiliation(s)
- S Benoist
- Research Unit 402 of INSERM, Paris, France
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Sajiki T, Iwata H, Paek HJ, Tosha T, Fujita S, Ueda Y, Park YG, Zhu B, Satoh S, Ikai I, Yamaoka Y, Ikada Y. Transmission electron microscopic study of hepatocytes in bioartificial liver. TISSUE ENGINEERING 2000; 6:627-40. [PMID: 11103084 DOI: 10.1089/10763270050199578] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A bioartificial liver (BAL) was prepared by simple inoculation of hepatocytes into the inner space of hollow fibers of a hemodialyzer and it was maintained in a closed circuit for in vitro culture. Morphology of hepatocytes in the hollow fibers was studied in detail using transmission electron microscopy (TEM). The hepatocytes formed three-dimensional, rod-shaped aggregates of 200 microm in diameter throughout the whole dimension of the hollow fibers after 1 day of culture. Approximately five hepatocyte layers existed from the surface to the center of the aggregate. The hepatocytes in the aggregate displayed mostly polygonal shapes and were surrounded by five to six cells. Abundant bile canaliculi were formed between the hepatocytes and were sealed by tight junctions. The distance between the adjacent hepatocytes except the bile canaliculus domain was approximately 20 nm, and interdigitation was observed between some hepatocytes. These observations indicate that the hepatocytes formed functionally associated aggregates, that is, organoids. Although the cells facing the inner surface of the hollow fiber lost their polygonal shape and became flattened during the following several-day culture, no drastic change was observed in the morphology of the hepatocytes located inside the aggregate. After 14 days of culture, the number of living cells decreased and most of these had a deformed nucleus, few numbers of organelles, and intermittent lipid droplets.
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Affiliation(s)
- T Sajiki
- Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan
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Behnia K, Bhatia S, Jastromb N, Balis U, Sullivan S, Yarmush M, Toner M. Xenobiotic metabolism by cultured primary porcine hepatocytes. TISSUE ENGINEERING 2000; 6:467-79. [PMID: 11074934 DOI: 10.1089/107632700750022125] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Considering the large yield of viable cells comparable to human liver, primary porcine hepatocytes offer a valuable resource for constructing a bioartificial liver device. In this study, the ability of cultured primary porcine hepatocytes to detoxify xenobiotics has been examined using various known substrates of cytochrome P450 isoenzymes and UDP-glucuronosyltransferases. Present investigation demonstrated the stability of the isoenzymes responsible for the metabolism of diazepam in native state and stabilization of other isoenzymes, as judged by ethoxycoumarin o-dealkylase (ECOD), ethoxyresorufin o-dealkylase (EROD), benzyloxyresorufin o-dealkylase (BROD), and pentoxyresorufin o-dealkylase (PROD) activities following induction in culture environment, for a period of 8 days. Resorufin O-dealkylase activities were found to be the most unstable and deteriorated within first 5 days in culture. These activities were restored following induction with 3-methylcholanthrene (3-MC) or sodium phenobarbital (PB) to 20-fold of 1 activity for EROD, and 60 and 174% of day 1 activity for PROD and BROD on day 8, respectively. Metabolism of methoxyresorufin was most strikingly increased following induction with 3-MC to approximately 60-fold of day 1 activity, on day 8. UDP-glucuronosyltransferase-dependent glucuronidation of phenol red, however, stayed intact during the course of our study without induction. Our study indicated that porcine hepatocytes in vitro maintain many important liver-specific functions including detoxification (steady state and inducibility).
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Affiliation(s)
- K Behnia
- Centre for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School and Shriners Hospitals for Children, Boston, Massachusetts 02114, USA
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Honiger J, Sarkis R, Baudrimont M, Delelo R, Chafai N, Benoist S, Sarkis K, Balladur P, Capeau J, Nordlinger B. Semiautomatic macroencapsulation of large numbers of porcine hepatocytes by coextrusion with a solution of AN69 polymer. Biomaterials 2000; 21:1269-74. [PMID: 10811308 DOI: 10.1016/s0142-9612(00)00012-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
We have previously demonstrated that allogenic and xenogenic hepatocytes macroencapsulated manually in AN-69 polymer and transplanted intra-peritoneally in rats remained viable for several weeks. However, this manual technique is inadequate to encapsulate several billions of hepatocytes which would be required to correct hepatic failure in big animals or humans. In the present study, we developed an original semiautomatic device in which isolated pig hepatocytes and the polymer solution containing 6% poly(acrylonitrile-sodium methallylsulfonate), 91% dimethylsulfoxide and 3% 0.9% NaCl solution were coextruded through a double-lumen spinneret. The extruded minitube (inner diameter: 1.8 mm, wall thickness: 0.07-0.1 mm) containing the encapsulated hepatocytes fell and coiled up in a 0.9% NaCl solution at 4 degrees C and was cut down in 4 m units containing about 120 million hepatocytes. This process allowed to encapsulate 50 million hepatocytes by minute with a preserved immediate cell viability (92 +/- 5%). To test prolonged cell viability after coextrusion, the minitubes were implanted intraperitoneally in rats. Three and seven days after implantation, they were explanted and analyzed. Cells were viable and well-preserved. Therefore, the semiautomatic device appears able to efficiently macroencapsulate in a limited time several billions of porcine hepatocytes which remain viable after transplantation in xenogenic conditions.
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Affiliation(s)
- J Honiger
- Research Unit 402 of INSERM, Faculte de Medecine Saint Antoine, Paris, France
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Wang L, Sun J, Wang C, Woodman K, Li L, Wu L, Harbour C, Johnston B, Shi L, Horvat M, Koutalistras N, Luo X, Watson J, Sheil AGR. Analysis of Multivariables during Porcine Liver Digestion to Improve Hepatocyte Yield and Viability for Use in Bioartificial Liver Support Systems. Cell Transplant 2000; 9:329-336. [PMID: 28880657 DOI: 10.1177/096368970000900304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
In order to achieve optimal BALSS function, preparation of porcine hepatocytes with high yield, viability, and P450 activity is known to be important. To date hepatocyte yields have varied from 0.58 × 1010 to 3.45 × 10 and viabilities from 75% to 95% within and between laboratories, even when using the same digestion methods and procedures, indicating that hepatocyte isolation during porcine liver digestion is not fully optimized. The aim of this work was to identify the critical parameters affecting cell recovery during porcine liver harvesting by investigating 21 variables involved in the process, including pig body and liver weight, different digestion times of perfusates, pH, a range of concentrations of sodium and chloride in EDTA, and collagenase perfusates. Univariate and multivariate analysis of a retrospective study (n = 23) revealed that low perfusate pH during the process of digestion had a positive effect on hepatocyte yield (p < 0.05), while high (relative) concentrations of sodium and chloride in the perfusates had significant negative effects on hepatocyte viability (both p < 0.05). Sodium and chloride had narrow optimal ranges for achieving a >90% viability. These findings were then tested in a prospective study (n = 10) and further verified. High hepatocyte viabilities (91.8 ± 1.6%, p = 0.036) and yields (2.56 ± 0.48 × 1010) were achieved consistently, and P450IA1 activity was increased after sodium and chloride concentrations and pH in the perfusates were controlled. The physiological mechanism by which sodium and chloride affects hepatocyte viability during porcine liver digestion is discussed.
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Affiliation(s)
- Lisheng Wang
- Auslralian National Liver Transplantation Unit, Royal Prince Alfred Hospital and Department of Surgery, University of Sydney, NSW 2006, Australia
| | - Junhong Sun
- Auslralian National Liver Transplantation Unit, Royal Prince Alfred Hospital and Department of Surgery, University of Sydney, NSW 2006, Australia
| | - Chuanmin Wang
- Auslralian National Liver Transplantation Unit, Royal Prince Alfred Hospital and Department of Surgery, University of Sydney, NSW 2006, Australia
| | - Kevin Woodman
- Auslralian National Liver Transplantation Unit, Royal Prince Alfred Hospital and Department of Surgery, University of Sydney, NSW 2006, Australia
| | - Li Li
- Auslralian National Liver Transplantation Unit, Royal Prince Alfred Hospital and Department of Surgery, University of Sydney, NSW 2006, Australia
| | - Lujia Wu
- Auslralian National Liver Transplantation Unit, Royal Prince Alfred Hospital and Department of Surgery, University of Sydney, NSW 2006, Australia
| | - Colin Harbour
- Department of Infectious Disease, University of Sydney, NSW 2006, Australia
| | - Brendan Johnston
- Auslralian National Liver Transplantation Unit, Royal Prince Alfred Hospital and Department of Surgery, University of Sydney, NSW 2006, Australia
| | - Liwei Shi
- Auslralian National Liver Transplantation Unit, Royal Prince Alfred Hospital and Department of Surgery, University of Sydney, NSW 2006, Australia
| | - Margret Horvat
- Auslralian National Liver Transplantation Unit, Royal Prince Alfred Hospital and Department of Surgery, University of Sydney, NSW 2006, Australia
| | - Nick Koutalistras
- Auslralian National Liver Transplantation Unit, Royal Prince Alfred Hospital and Department of Surgery, University of Sydney, NSW 2006, Australia
| | - Xianfeng Luo
- Auslralian National Liver Transplantation Unit, Royal Prince Alfred Hospital and Department of Surgery, University of Sydney, NSW 2006, Australia
| | - Jenny Watson
- Auslralian National Liver Transplantation Unit, Royal Prince Alfred Hospital and Department of Surgery, University of Sydney, NSW 2006, Australia
| | - A G R Sheil
- Auslralian National Liver Transplantation Unit, Royal Prince Alfred Hospital and Department of Surgery, University of Sydney, NSW 2006, Australia
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Sajiki T, Iwata H, Paek HJ, Tosha T, Fujita S, Ueda Y, Park YG, Zhu B, Satoh S, Ikai I, Yamaoka Y, Ikada Y. Morphologic studies of hepatocytes entrapped in hollow fibers of a bioartificial liver. ASAIO J 2000; 46:49-55. [PMID: 10667716 DOI: 10.1097/00002480-200001000-00014] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
A bioartificial liver cartridge was prepared by inoculating porcine hepatocytes into the inner space of hollow fibers of a hemodialyzer. The hepatocytes formed rod shaped cell aggregates during in vitro perfusion culture within 1 day. Morphologic examination was carried out on the aggregates by optical and electron microscopy. Each hepatocyte was in direct contact with adjacent cells and a bile canaliculus-like structure was occasionally seen between hepatocytes. High magnification observation showed that the canaliculus was separated from the remainder of the intercellular space by a tight junction. These facts suggest that the hepatocytes formed functionally associated cell aggregates with a compact morphology not unlike hepatocyte spheroids. These structures were well maintained for 7 days in culture, and then the amorphous area in the aggregates and the nonviable cell number increased with lengthening culture period. The bioartificial liver maintained the ability to metabolize lidocaine, ammonia, and galactose for 7 days and then deteriorated with time.
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Affiliation(s)
- T Sajiki
- Institute for Frontier Medical Sciences, Kyoto University, Japan
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Gregory PG, Connolly CK, Toner M, Sullivan SJ. In vitro characterization of porcine hepatocyte function. Cell Transplant 2000; 9:1-10. [PMID: 10784060 DOI: 10.1177/096368970000900101] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The clinical consequences of acute liver failure are associated with high mortality. Intensive medical intervention is required to treat the symptoms of liver failure, including coagulopathy, metabolic instability, and encephalopathy. Providing temporary liver support with an extracorporeal liver assist device could stabilize the patient until a donor liver became available or the patient's own liver was able to recover. The use of human hepatocytes as the biologic component of the assist device is precluded by the scarcity of available tissue and the limited proliferative potential of adult hepatocytes in vitro. Consequently, porcine hepatocytes are being evaluated as a cell source for liver assist devices. Maintaining differentiated function in isolated hepatocytes, however, remains a challenge in the development of this technology and is complicated by the fact that the key therapeutic functions for short-term survival have not been well defined. Several approaches have been effective in prolonging rodent hepatocyte function in vitro, including manipulation of extracellular matrix. Here, we have investigated porcine hepatocyte function in vitro with a specific emphasis on the response to exogenous collagen matrix. In control cultures, albumin secretion increased during the first 7-10 days of culture to an average of 50 +/- 17 microg/day/10(6) cells and then decreased over the next 2 weeks. The pattern of urea synthesis was slightly different in that it was highest in the first 1-3 days postisolation (140 +/- 19 microg/day/10(6) cells) and then decreased by about 50% to a plateau level that was stable during the next 3-4 weeks of culture. Cytochrome P450-mediated activities were the most labile with time in culture and were undetectable after the first week in the absence of pharmacological inducers. In contrast to results reported for rat cells, porcine hepatocytes exhibited differentiated function in the absence of any modification of the culture dish surface and function was not increased or prolonged in the presence of exogenous collagen.
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Desille M, Corcos L, L'Helgoualc'h A, Frémond B, Campion JP, Guillouzo A, Clément B. Detoxifying activity in pig livers and hepatocytes intended for xenotherapy. Transplantation 1999; 68:1437-43. [PMID: 10589936 DOI: 10.1097/00007890-199911270-00002] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
BACKGROUND Both livers and hepatocytes from pigs have been proposed for the treatment of end-stage liver diseases, as an alternative to allogeneic liver transplants. However, little is known of the capability of porcine hepatocytes to fulfill the biotransformation pathways of toxic compounds, including those released from livers in acute failure. We have studied the activity and expression of detoxifying enzymes in porcine livers and in cultured hepatocytes and their induction by phenobarbital. METHODS Cytochromes P450 (CYP) 1A, 2B, and 3A and GST-like activities were tested with the following specific substrates: 7-ethoxyresorufin, 7-pentoxyresorufin, nifedipine, testosterone, 1-chloro-2,4-dinitrobenzene, 1,2-dichloro-4-nitrobenzene, and ethacrinic acid. CYP 1A1/2-, 2B1/2-, 2E1- and 3A4-related and GSTalpha proteins were analyzed by Western blotting and CYP 1A1/2, 2B1/2, 2C6, 2E1, and 3A4, aldehyde dehydrogenase, epoxide hydrolase, and GSTalpha-like RNA by Northern blotting. RESULTS Enzymatic activities reflecting the expression of CYP 1A-, CYP 2B-, CYP 2E1-, and CYP 3A-like genes, that is, ethoxyresorufin-O-deethylase, pentoxyresorufin-O-deethylase, nifedipine oxidase and testosterone 6beta-hydroxylase, and chlorzoxazone 6-hydroxylase, were identified in pig livers. CYP 1A and CYP 2E1, GSTalpha-like proteins, CYP 1A, 2C, and 2E, epoxide hydrolase, aldehyde dehydrogenase, and GST like RNA were expressed in vivo and in vitro. CYP 2B and CYP 3A RNA and proteins, and their associated activities were induced by phenobarbital. CONCLUSIONS Porcine hepatocytes express the most important biotransformation enzymes and their corresponding activities and RNA. Thus, livers and hepatocytes from pigs can detoxify a large spectrum of exogenous and endogenous compounds, which makes them a convenient substitute for allogeneic transplants for patients with liver failure.
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Affiliation(s)
- M Desille
- INSERM U456, Detoxication and Repair Unit, University of Rennes I, France
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Abstract
Liver failure is a serious problem that affects thousands of people in the United States each year. Other than liver transplantation, a supportive therapy has been unavailable for patients with liver failure that is refractory to medical treatment. An apparent solution to this problem is a hepatocyte liver-assist system. Such a system is composed of mammalian hepatocytes loaded in a mechanical apparatus, such as a hollow fiber cartridge. During extracorporeal perfusion of the system, the hepatocytes provide metabolic function to the patient with liver failure. At least two extracorporeal hepatocyte systems have shown promise in human clinical trials of acute liver failure. In fact, one system has gained approval from the Food and Drug Administration for testing in a randomized multicenter clinical trial. In this article, key issues of clinical testing are reviewed, and major contributions and questions that remain unresolved are emphasized.
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Affiliation(s)
- S L Nyberg
- Division of Transplantation Surgery, Mayo Clinic Rochester, Minnesota 55905, USA
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Sarkis R, Wen L, Honiger J, Baudrimont M, Delelo R, Calmus Y, Capeau J, Nordlinger B. [Intraperitoneal transplantation of isolated hepatocytes of the pig: the implantable bioartificial liver]. CHIRURGIE; MEMOIRES DE L'ACADEMIE DE CHIRURGIE 1998; 123:41-6. [PMID: 9752553 DOI: 10.1016/s0001-4001(98)80037-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The general aim is to prepare a bioartificial liver to treat acute hepatic failure using allo- and xenogeneic hepatocytes, immunoprotected by macroencapsulation and transplanted into the peritoneal cavity. The goal of this study was to prepare a large amount of isolated porcine hepatocytes, to encapsulate them within biocompatible membranes for transplant in allo- and xenogeneic combinations and to examine the viability and functionality of the cells 6 weeks later. Hepatocyte isolation was performed in 12 kg pigs (n = 15) by dissociation of the liver with collagenase D (1 g) without oxygenation. Encapsulation of the hepatocyte suspension (10(7)/mL) was performed in hydrogel membranes AN69; hollow fibers (2 m x 0.8 mm) and flaskes (1.8 cm), and transplanted to Yucatan pigs (n = 4) and Lewis rats (n = 12). Six weeks later, they were removed to study the cell viability by histological examination, and the production of albumin by immunonephelometry. The rate of isolated hepatocytes was 38 +/- 5 x 10(9)/mL by liver of pig and the mean viability was 93 +/- 2%. Six weeks after transplantation, hepatocytes were viable, organized in lobules, and showed conserved albumin production. The same results were observed for allogenic and xenogeneic combinations. In conclusion, this method of liver dissociation allowed for preparation of a large amount of isolated hepatocytes from a single pig liver, theoretically sufficient to treat a patient with acute liver failure. Hydrogel membranes were well tolerated and allowed immunoprotection without immunosuppression. Transplanted hepatocytes remained functional. This work is an important step in progress toward clinical application.
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Joly A, Desjardins JF, Fremond B, Desille M, Campion JP, Malledant Y, Lebreton Y, Semana G, Edwards-Levy F, Levy MC, Clement B. Survival, proliferation, and functions of porcine hepatocytes encapsulated in coated alginate beads: a step toward a reliable bioartificial liver. Transplantation 1997; 63:795-803. [PMID: 9089217 DOI: 10.1097/00007890-199703270-00002] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Orthotopic liver transplantation is the most effective treatment for fulminant hepatic failure. As an alternative treatment, an efficient extracorporeal bioartificial liver should contain a large yield of functional hepatocytes with an immunoprotective barrier, for providing temporary adequate metabolic support to allow spontaneous liver regeneration or for acting as a bridge toward transplantation. Survival, proliferation, and functions of porcine hepatocytes were evaluated in primary cultures and after embedding in alginate beads, which were subsequently coated with a membrane made by a transacylation reaction between propylene glycol alginate and human serum albumin. Disruption of total pig livers by collagenase perfusion/recirculation allowed the obtention of up to 10(11) hepatocytes with a viability greater than 95%. Hepatocytes in conventional cultures or embedded in coated alginate beads survived for about 10 days, secreted proteins, particularly albumin, and maintained several phase I and II enzymatic activities, namely ethoxyresorufin-O-deethylase, oxidation of nifedipine to pyridine, phenacetin deethylation to paracetamol, glucuroconjugation of paracetamol, and N-acetylation of procainamide. Typical features of mitosis and [3H]thymidine incorporation indicated that porcine hepatocytes proliferated in both conventional cultures and alginate beads. The efficacy of the membrane surrounding alginate beads for protecting cells from immunoglobulins was tested by embedding HLA-typed human lymphocytes, which were subsequently incubated with specific anti-HLA immunoglobulin G and complement. These data show that large yields of porcine hepatocytes that are embedded in coated alginate beads remain functional and are isolated from large molecular weight molecules, such as immunoglobulins. This system represents a promising tool for the design of an extracorporeal bioartificial liver, containing xenogeneic hepatocytes, to treat acute liver disease in humans.
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Affiliation(s)
- A Joly
- Detoxication and Tissue Repair Unit 456, Institut National de la Santéde la Recherche Médicale, Rennes I University School of Medicine, France
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