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Pluta KD, Ciezkowska M, Wisniewska M, Wencel A, Pijanowska DG. Cell-based clinical and experimental methods for assisting the function of impaired livers – Present and future of liver support systems. Biocybern Biomed Eng 2021. [DOI: 10.1016/j.bbe.2021.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Abstract
PURPOSE OF REVIEW While liver transplantation is an established treatment for liver failure, the number of patients with liver failure amenable to such intervention far outnumbers the donor supply of livers. Technologies serving to bridge this gap are required. Artificial livers may serve as an alternative. In this review, we discuss the development of artificial liver technologies. RECENT FINDINGS The accrued clinical data suggest that current liver assist devices may serve a role in specific liver diseases, but for the most part no survival benefit has been demonstrated. More clinical trials are expected to elucidate their utilization. Simultaneously, recent advances in materials and tissue engineering are allowing for exciting developments for novel artificial livers. SUMMARY As there continues to be more clinical data regarding the use of current liver devices, new intricate artificial liver technologies, with the use of sophisticated three-dimensional materials, are being developed that may help improve outcomes of liver failure patients.
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Affiliation(s)
- Asish C Misra
- Department of Surgery, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
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Oprea M, Voicu SI. Recent Advances in Applications of Cellulose Derivatives-Based Composite Membranes with Hydroxyapatite. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E2481. [PMID: 32486050 PMCID: PMC7321373 DOI: 10.3390/ma13112481] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 05/27/2020] [Accepted: 05/28/2020] [Indexed: 12/21/2022]
Abstract
The development of novel polymeric composites based on cellulose derivatives and hydroxyapatite represents a fascinating and challenging research topic in membranes science and technology. Cellulose-based materials are a viable alternative to synthetic polymers due to their favorable physico-chemical and biological characteristics. They are also an appropriate organic matrix for the incorporation of hydroxyapatite particles, inter and intramolecular hydrogen bonds, as well as electrostatic interactions being formed between the functional groups on the polymeric chains surface and the inorganic filler. The current review presents an overview on the main application fields of cellulose derivatives/hydroxyapatite composite membranes. Considering the versatility of hydroxyapatite particles, the hybrid materials offer favorable prospects for applications in water purification, tissue engineering, drug delivery, and hemodialysis. The preparation technique and the chemical composition have a big influence on the final membrane properties. The well-established membrane fabrication methods such as phase inversion, electrospinning, or gradual electrostatic assembly are discussed, together with the various strategies employed to obtain a homogenous dispersion of the inorganic particles in the polymeric matrix. Finally, the main conclusions and the future directions regarding the preparation and applications of cellulose derivatives/hydroxyapatite composite membranes are presented.
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Affiliation(s)
- Madalina Oprea
- National Institute for Research and Development in Chemistry and Petrochemistry ICECHIM, Splaiul Independentei 202, 060021 Bucharest, Romania;
- Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Gheorghe Polizu 1-7, 011061 Bucharest, Romania
| | - Stefan Ioan Voicu
- Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Gheorghe Polizu 1-7, 011061 Bucharest, Romania
- Advanced Polymer Materials Group, Faculty of Applied Chemistry and Material Science, University Polytehnica of Bucharest, Gheorghe Polizu 1-7, 011061 Bucharest, Romania
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Liver Bioreactor Design Issues of Fluid Flow and Zonation, Fibrosis, and Mechanics: A Computational Perspective. J Funct Biomater 2020; 11:jfb11010013. [PMID: 32121053 PMCID: PMC7151609 DOI: 10.3390/jfb11010013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 01/27/2020] [Accepted: 02/18/2020] [Indexed: 02/06/2023] Open
Abstract
Tissue engineering, with the goal of repairing or replacing damaged tissue and organs, has continued to make dramatic science-based advances since its origins in the late 1980’s and early 1990’s. Such advances are always multi-disciplinary in nature, from basic biology and chemistry through physics and mathematics to various engineering and computer fields. This review will focus its attention on two topics critical for tissue engineering liver development: (a) fluid flow, zonation, and drug screening, and (b) biomechanics, tissue stiffness, and fibrosis, all within the context of 3D structures. First, a general overview of various bioreactor designs developed to investigate fluid transport and tissue biomechanics is given. This includes a mention of computational fluid dynamic methods used to optimize and validate these designs. Thereafter, the perspective provided by computer simulations of flow, reactive transport, and biomechanics responses at the scale of the liver lobule and liver tissue is outlined, in addition to how bioreactor-measured properties can be utilized in these models. Here, the fundamental issues of tortuosity and upscaling are highlighted, as well as the role of disease and fibrosis in these issues. Some idealized simulations of the effects of fibrosis on lobule drug transport and mechanics responses are provided to further illustrate these concepts. This review concludes with an outline of some practical applications of tissue engineering advances and how efficient computational upscaling techniques, such as dual continuum modeling, might be used to quantify the transition of bioreactor results to the full liver scale.
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Underhill GH, Khetani SR. Bioengineered Liver Models for Drug Testing and Cell Differentiation Studies. Cell Mol Gastroenterol Hepatol 2018; 5:426-439.e1. [PMID: 29675458 PMCID: PMC5904032 DOI: 10.1016/j.jcmgh.2017.11.012] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 11/21/2017] [Indexed: 12/19/2022]
Abstract
In vitro models of the human liver are important for the following: (1) mitigating the risk of drug-induced liver injury to human beings, (2) modeling human liver diseases, (3) elucidating the role of single and combinatorial microenvironmental cues on liver cell function, and (4) enabling cell-based therapies in the clinic. Methods to isolate and culture primary human hepatocytes (PHHs), the gold standard for building human liver models, were developed several decades ago; however, PHHs show a precipitous decline in phenotypic functions in 2-dimensional extracellular matrix-coated conventional culture formats, which does not allow chronic treatment with drugs and other stimuli. The development of several engineering tools, such as cellular microarrays, protein micropatterning, microfluidics, biomaterial scaffolds, and bioprinting, now allow precise control over the cellular microenvironment for enhancing the function of both PHHs and induced pluripotent stem cell-derived human hepatocyte-like cells; long-term (4+ weeks) stabilization of hepatocellular function typically requires co-cultivation with liver-derived or non-liver-derived nonparenchymal cell types. In addition, the recent development of liver organoid culture systems can provide a strategy for the enhanced expansion of therapeutically relevant cell types. Here, we discuss advances in engineering approaches for constructing in vitro human liver models that have utility in drug screening and for determining microenvironmental determinants of liver cell differentiation/function. Design features and validation data of representative models are presented to highlight major trends followed by the discussion of pending issues that need to be addressed. Overall, bioengineered liver models have significantly advanced our understanding of liver function and injury, which will prove useful for drug development and ultimately cell-based therapies.
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Key Words
- 3D, 3-dimensional
- BAL, bioartificial liver
- Bioprinting
- CRP, C-reactive protein
- CYP450, cytochrome P450
- Cellular Microarrays
- DILI, drug-induced liver injury
- ECM, extracellular matrix
- HSC, hepatic stellate cell
- Hepatocytes
- IL, interleukin
- KC, Kupffer cell
- LSEC, liver sinusoidal endothelial cell
- MPCC, micropatterned co-culture
- Microfluidics
- Micropatterned Co-Cultures
- NPC, nonparenchymal cell
- PEG, polyethylene glycol
- PHH, primary human hepatocyte
- Spheroids
- iHep, induced pluripotent stem cell-derived human hepatocyte-like cell
- iPS, induced pluripotent stem
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Affiliation(s)
- Gregory H. Underhill
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - Salman R. Khetani
- Department of Bioengineering, University of Illinois at Chicago, Chicago, Illinois
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Affiliation(s)
- J P O'Beirne
- Liver Intensive Care Unit, Kings College Hospital, London, UK
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Abstract
Despite the tremendous hurdles presented by the complexity of the liver's structure and function, advances in liver physiology, stem cell biology and reprogramming, and the engineering of tissues and devices are accelerating the development of cell-based therapies for treating liver disease and liver failure. This State of the Art Review discusses both the near- and long-term prospects for such cell-based therapies and the unique challenges for clinical translation.
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Affiliation(s)
- Sangeeta N Bhatia
- Institute for Medical Engineering & Science at MIT, Department of Electrical Engineering and Computer Science, David H. Koch Institute at MIT, and the Howard Hughes Medical Institute, Cambridge, MA 02139, USA. Division of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA.
| | - Gregory H Underhill
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Kenneth S Zaret
- Institute for Regenerative Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Ira J Fox
- Department of Surgery, Children's Hospital of Pittsburgh of UPMC, University of Pittsburgh School of Medicine, and McGowan Institute for Regenerative Medicine, Pittsburgh, PA 15224, USA
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Ginai M, Elsby R, Hewitt CJ, Surry D, Fenner K, Coopman K. The use of bioreactors as in vitro models in pharmaceutical research. Drug Discov Today 2013; 18:922-35. [PMID: 23748137 DOI: 10.1016/j.drudis.2013.05.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 04/24/2013] [Accepted: 05/22/2013] [Indexed: 12/23/2022]
Abstract
Bringing a new drug to market is costly in terms of capital and time investments, and any development issues encountered during late-stage clinical trials can often be the result of in vitro-in vivo extrapolations (IVIVE) not accurately reflecting clinical outcome. In the discipline of drug metabolism and pharmacokinetics (DMPK), current in vitro cellular methods do not provide the 3D structure and function of organs found in vivo; therefore, new dynamic methods need to be established to aid improvement of IVIVE. In this review, we highlight the importance of model progression into dynamic systems for use within drug development, focusing on devices developed currently in the areas of the liver and blood-brain barrier (BBB), and the potential to develop models for other organ systems, such as the kidney. We discuss the development of dynamic 3D bioreactor-based systems as in vitro models for use in DMPK studies.
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Affiliation(s)
- Maaria Ginai
- Centre for Biological Engineering, Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, UK
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Mueller D, Tascher G, Müller-Vieira U, Knobeloch D, Nuessler AK, Zeilinger K, Heinzle E, Noor F. In-depth physiological characterization of primary human hepatocytes in a 3D hollow-fiber bioreactor. J Tissue Eng Regen Med 2011; 5:e207-18. [DOI: 10.1002/term.418] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2010] [Accepted: 02/21/2011] [Indexed: 01/12/2023]
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Ring A, Gerlach J, Peters G, Pazin BJ, Minervini CF, Turner ME, Thompson RL, Triolo F, Gridelli B, Miki T. Hepatic Maturation of Human Fetal Hepatocytes in Four-Compartment Three-Dimensional Perfusion Culture. Tissue Eng Part C Methods 2010; 16:835-45. [DOI: 10.1089/ten.tec.2009.0342] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Affiliation(s)
- Alexander Ring
- Berlin Brandenburg Center for Regenerative Therapies (BCRT), Charité-Universitäts Medizin Berlin, Division of Experimental Surgery, Berlin, Germany
| | - Jörg Gerlach
- Department of Surgery, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Grant Peters
- Department of Surgery, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Benjamin J. Pazin
- Department of Surgery, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Crescenzio F. Minervini
- Department of Surgery, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | | | | | - Fabio Triolo
- Regenerative Medicine and Cell Therapy Unit, ISMETT—Mediterranean Institute for Transplantation and Advanced Specialized Therapies, Palermo, Italy
| | - Bruno Gridelli
- Regenerative Medicine and Cell Therapy Unit, ISMETT—Mediterranean Institute for Transplantation and Advanced Specialized Therapies, Palermo, Italy
| | - Toshio Miki
- Department of Surgery, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
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Abstract
A variety of bioartificial liver support systems were developed to replace some of the liver's function in case of liver failure. Those systems, in contrast to purely artificial systems, incorporate metabolically active cells to contribute synthetic and regulatory functions as well as detoxification. The selection of the ideal cell source and the design of more sophisticated bioreactors are the main issues in this field of research. Several systems were already introduced into clinical studies to prove their safety. This review briefly introduces a cross-section of experimental and clinically applied systems and tries to give an overview on the problems and limitations of bioartificial liver support.
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Affiliation(s)
- Gesine Pless
- Institut für Physiologische Chemie, Universitätsklinikum Essen, Essen, Germany
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Abstract
This paper outlines prospects for applying the emerging techniques of synthetic biology to the field of anatomy, with the aim of programming cells to organize themselves into specific, novel arrangements, structures and tissues. There are two main reasons why developing this hybrid discipline--synthetic morphology--would be useful. The first is that having a way to engineer self-constructing assemblies of cells would provide a powerful means of tissue engineering for clinical use in surgery and regenerative medicine. The second is that construction of simple novel systems according to theories of morphogenesis gained from study of real embryos will provide a means of testing those theories rigorously, something that is very difficult to do by manipulation of complex embryos. This paper sets out the engineering requirements for synthetic morphology, which include the development of a library of sensor modules, regulatory modules and effector modules that can be connected functionally within cells. A substantial number of sensor and regulatory modules already exist and this paper argues that some potential effector modules have already been identified. The necessary library may therefore be within reach. The paper ends by suggesting a set of challenges, ranging from simple to complex, the achievement of which would provide valuable proofs of concept.
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Affiliation(s)
- Jamie A Davies
- Centre for Integrative Physiology, University of Edinburgh, George Square, Edinburgh, United Kingdom.
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Abstract
Hybrid extracorporeal liver support is an option to assist liver transplantation therapy. An overview on liver cell bioreactors is given and our own development is described. Furthermore, the prospects of the utilization of human liver cells from discarded transplantation organs due to steatosis, cirrhosis, or traumatic injury, and liver progenitor cells are discussed. Our Modular Extracorporeal Liver Support (MELS) concept proposes an integrative approach for the treatment of hepatic failure with appropriate extracorporeal therapy units, tailored to suit the actual clinical needs of each patient. The CellModule is a specific bioreactor (charged actually with primary human liver cells, harvested from human donor livers found to be unsuitable for transplantation). The DetoxModule enables albumin dialysis for the removal of albumin-bound toxins, reducing the biochemical burden of the liver cells and replacing the bile excretion of hepatocytes in the bioreactor. A Dialysis Module for continuous veno-venous hemofiltration can be added to the system if required in hepato-renal syndrome.
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Affiliation(s)
- Jörg C Gerlach
- Department of Surgery and Bioengineering, McGowan Institute for Regenerative Medicine, University of Pittsburgh, PA, USA.
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Monga SPS, Hout MS, Baun MJ, Micsenyi A, Muller P, Tummalapalli L, Ranade AR, Luo JH, Strom SC, Gerlach JC. Mouse fetal liver cells in artificial capillary beds in three-dimensional four-compartment bioreactors. THE AMERICAN JOURNAL OF PATHOLOGY 2005; 167:1279-92. [PMID: 16251412 PMCID: PMC1603778 DOI: 10.1016/s0002-9440(10)61215-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/21/2005] [Indexed: 01/25/2023]
Abstract
Bioreactors containing porcine or adult human hepatocytes have been used to sustain acute liver failure patients until liver transplantation. However, prolonged function of adult hepatocytes has not been achieved due to compromised proliferation and viability of adult cells in vitro. We investigated the use of fetal hepatocytes as an alternative cell source in bioreactors. Mouse fetal liver cells from gestational day 17 possessed intermediate differentiation and function based on their molecular profile. When cultured in a three-dimensional four-compartment hollow fiber-based bioreactor for 3 to 5 weeks these cells formed neo-tissues that were characterized comprehensively. Albumin liberation, testosterone metabolism, and P450 induction were demonstrated. Histology showed predominant ribbon-like three-dimensional structures composed of hepatocytes between hollow fibers. High positivity for proliferating cell nuclear antigen and Ki-67 and low positivity for terminal dUTP nick-end labeling indicated robust cell proliferation and survival. Most cells within these ribbon arrangements were albumin-positive. In addition, cells in peripheral zones were simultaneously positive for alpha-fetoprotein, cytokeratin-19, and c-kit, indicating their progenitor phenotype. Mesenchymal components including endothelial, stellate, and smooth muscle cells were also observed. Thus, fetal liver cells can survive, proliferate, differentiate, and function in a three-dimensional perfusion culture system while maintaining a progenitor pool, reflecting an important advance in hepatic tissue engineering.
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Affiliation(s)
- Satdarshan P S Monga
- Department of Pathology, McGowan Institute for Regenerative Medicine, and the Department of Pharmacy, University of Pittsburgh, SOM, S421-BST, 200 Lothrop St., Pittsburgh PA 15261, USA.
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Barshes NR, Gay AN, Williams B, Patel AJ, Awad SS. Support for the Acutely Failing Liver: A Comprehensive Review of Historic and Contemporary Strategies. J Am Coll Surg 2005; 201:458-76. [PMID: 16125082 DOI: 10.1016/j.jamcollsurg.2005.04.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2005] [Revised: 03/23/2005] [Accepted: 04/11/2005] [Indexed: 12/16/2022]
Affiliation(s)
- Neal R Barshes
- Michael E DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX, USA
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Gerlach JC, Mutig K, Sauer IM, Schrade P, Efimova E, Mieder T, Naumann G, Grunwald A, Pless G, Mas A, Bachmann S, Neuhaus P, Zeilinger K. Use of primary human liver cells originating from discarded grafts in a bioreactor for liver support therapy and the prospects of culturing adult liver stem cells in bioreactors: a morphologic study. Transplantation 2003; 76:781-6. [PMID: 14501853 DOI: 10.1097/01.tp.0000083319.36931.32] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
INTRODUCTION The development of a bioreactor providing a three-dimensional network of interwoven capillary membranes with integrated oxygenation and decentralized mass exchange enables the culture of primary human liver cells from discarded donor organs for extracorporeal liver support. METHODS Primary liver cells were isolated from 54 discarded organs (donor age 56.7+/-13.2 years). Between 2.8x10(10) and 6.4x10(10) parenchymal cells (PC) were cocultured with nonparenchymal cells (NPC) of the same organ in bioreactors (n=36). The metabolic activity of the cells was regularly determined during culture. The cell morphology and ultrastructure were investigated after culture periods of 1 to 5 weeks. RESULTS Cell metabolism was maintained over at least 3 weeks after a phase of adaptation lasting 2 to 3 days. Through the use of transmission electron microscopy and immunohistochemistry, it was demonstrated that PC and NPC spontaneously formed tissue-like structures. Vascular cavities (CD 31 immunoreactivity [IR]) and bile duct-like channels (CK 19 IR), both exhibiting proliferation activity (Ki-67 IR), were regularly distributed. Some of the bile duct-like channels showed similarities to the Canals of Hering found in the natural liver. Cells expressing morphologic and antigenic characteristics of adult liver stem cells (CD 34 IR and c-kit IR) and areas with cells that showed both hepatocyte and biliary characteristics were detected. CONCLUSION The results show that primary human liver cells obtained from discarded donor organs recover and can be maintained in bioreactors for clinical liver support therapy. In addition, initial observations on adult liver stem-cell culture in bioreactors are presented.
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Affiliation(s)
- Jörg C Gerlach
- Department of Surgery, Charité, Campus Virchow, Humboldt University, Berlin, Germany.
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