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Weng J, Han X, Zeng F, Zhang Y, Feng L, Cai L, Liang K, Liu S, Li S, Fu G, Zeng M, Gao Y. Fiber scaffold bioartificial liver therapy relieves acute liver failure and extrahepatic organ injury in pigs. Theranostics 2021; 11:7620-7639. [PMID: 34335954 PMCID: PMC8315066 DOI: 10.7150/thno.58515] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 04/15/2021] [Indexed: 02/06/2023] Open
Abstract
Rationale: Acute liver failure (ALF) causes severe liver injury and a systemic inflammatory response, leading to multiorgan failure with a high short-term mortality. Bioartificial liver (BAL) therapy is a promising approach that is hampered by the lack of appropriate bioreactors and carriers to retain hepatic cell function and poor understanding of BAL treatment mechanisms in ALF and extrahepatic organ injury. Recently, we used a fiber scaffold bioreactor (FSB) for the high-density, three-dimensional (3D) culture of primary porcine hepatocytes (PPHs) combined with an absorption component to construct a BAL and verified its function in a D-galactosamine (D-gal)-induced ALF porcine model to evaluate its protective effects on the liver and extrahepatic organs. Methods: Male pigs were randomized into standard/supportive therapy (ST), ST+no-cell BAL (ST+Sham BAL) and ST+BAL groups and received treatment 48 h after receiving a D-gal injection. Changes in blood chemistry and clinical symptoms were monitored for 120 h. Tissues and plasma were collected for analysis by pathological examination, immunoblotting, quantitative PCR and immunoassays. Results: PPHs cultured in the FSB obtained sufficient aeration and nutrition for high-density, 3D culture and maintained superior viability and functionality (biosynthesis and detoxification) compared with those cultured in flasks. All the animals developed ALF, acute kidney injury (AKI) and hepatic encephalopathy (HE) 48 h after D-gal infusion and received corresponding therapies. Animals in the BAL group showed markedly improved survival (4/5; 80%) compared with those in the ST+Sham BAL (0/5; p < 0.001) and ST (0/5; p < 0.001) groups. The levels of blood ammonia and biochemical and inflammatory indices were alleviated after BAL treatment. Increased liver regeneration and attenuations in the occurrence and severity of ALF, AKI and HE were observed in the ST+BAL group compared with the ST (p = 0.0009; p = 0.038) and ST+Sham BAL (p = 0.011; p = 0.031) groups. Gut leakage, the plasma endotoxin level, bacterial translocation, and peripheral and neuroinflammation were alleviated in the ST+BAL group compared with those in the other groups. Conclusions: BAL treatment enhanced liver regeneration and alleviated the systemic inflammatory response and extrahepatic organ injury to prolong survival in the ALF model and has potential as a therapeutic approach for ALF patients.
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Affiliation(s)
- Jun Weng
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital of Southern Medical University, Guangzhou 510515, China
- State Key Laboratory of Organ Failure Research, Southern Medical University, Guangzhou 510515, China
| | - Xu Han
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital of Southern Medical University, Guangzhou 510515, China
- State Key Laboratory of Organ Failure Research, Southern Medical University, Guangzhou 510515, China
| | - Fanhong Zeng
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital of Southern Medical University, Guangzhou 510515, China
- State Key Laboratory of Organ Failure Research, Southern Medical University, Guangzhou 510515, China
| | - Yue Zhang
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital of Southern Medical University, Guangzhou 510515, China
- State Key Laboratory of Organ Failure Research, Southern Medical University, Guangzhou 510515, China
| | - Lei Feng
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital of Southern Medical University, Guangzhou 510515, China
- State Key Laboratory of Organ Failure Research, Southern Medical University, Guangzhou 510515, China
| | - Lei Cai
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital of Southern Medical University, Guangzhou 510515, China
- State Key Laboratory of Organ Failure Research, Southern Medical University, Guangzhou 510515, China
| | - Kangyan Liang
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital of Southern Medical University, Guangzhou 510515, China
- State Key Laboratory of Organ Failure Research, Southern Medical University, Guangzhou 510515, China
| | - Shusong Liu
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital of Southern Medical University, Guangzhou 510515, China
- State Key Laboratory of Organ Failure Research, Southern Medical University, Guangzhou 510515, China
| | - Shao Li
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital of Southern Medical University, Guangzhou 510515, China
- State Key Laboratory of Organ Failure Research, Southern Medical University, Guangzhou 510515, China
| | - Gongbo Fu
- Department of Medical Oncology, Jinling Hospital, First School of Clinical Medicine, Southern Medical University, Nanjing 210000, China
| | - Min Zeng
- Guangdong Qianhui Biotechnology Co., Ltd., Guangzhou 510285, China
| | - Yi Gao
- Department of Hepatobiliary Surgery II, Guangdong Provincial Research Center for Artificial Organ and Tissue Engineering, Guangzhou Clinical Research and Transformation Center for Artificial Liver, Institute of Regenerative Medicine, Zhujiang Hospital of Southern Medical University, Guangzhou 510515, China
- State Key Laboratory of Organ Failure Research, Southern Medical University, Guangzhou 510515, China
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Kock FVC, Higuera-Padilla AR, Vigatto MDSS, Martin Neto L, Colnago LA. Magnetic resonance studies of copper (II) sorbitol complex, in solution, reveal a supramolecular structure compatible to the crystal structure. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2019; 57:404-411. [PMID: 30864253 DOI: 10.1002/mrc.4863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 02/23/2019] [Accepted: 03/04/2019] [Indexed: 06/09/2023]
Abstract
Although the Cu2+ -sorbitol complex [Cu2+ -Sorb] structure in crystalline state has been determined by X rays, it is not known in solution, where most studies of this complex are performed. Therefore, the goal of this work was to obtain information about the structure of this complex in aqueous solution using nuclear magnetic resonance and electron paramagnetic resonance spectroscopies. The magnetic resonance results indicate that the complex is formed at approximately pH 12. In this pH the sorbitol 1 H relaxation times were so short (broad line) that was not possible to use standard nuclear magnetic resonance parameters (nuclear Overhauser effect and spin-spin coupling constants values) to solve the three-dimensional structure. However, valuable structural information about the complex in solution was obtained. The relaxation results indicate that the Cu2+ ions are buried in the structure and not accessible to solvent; the 1 H and 13 C spectra shows strong paramagnetic shift effect indicating short distance between these nuclei and Cu2+ in the structure. No electron paramagnetic resonance signal was observed in pH 12 indicating strong Cu2+ - Cu2+ dipolar interaction, compatible to Cu2+ -Cu2+ distances measured in crystal, from 1.148 to 1.393 Angstroms. The complex self-diffusion coefficient (D) of 1.58 × 10-10 m2 /s value, determined by Diffusion-Ordered Spectroscopy, is compatible to a molecular weight of 3-6 KDa. Therefore, these results corroborate that the [Cu2+ -Sorb] complex is assembled in solution, at pH 12, with several structural parameters compatible to the toroidal hexadecacuprate supramolecular structure determined in solid state.
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Legallais C, Kim D, Mihaila SM, Mihajlovic M, Figliuzzi M, Bonandrini B, Salerno S, Yousef Yengej FA, Rookmaaker MB, Sanchez Romero N, Sainz-Arnal P, Pereira U, Pasqua M, Gerritsen KGF, Verhaar MC, Remuzzi A, Baptista PM, De Bartolo L, Masereeuw R, Stamatialis D. Bioengineering Organs for Blood Detoxification. Adv Healthc Mater 2018; 7:e1800430. [PMID: 30230709 DOI: 10.1002/adhm.201800430] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Revised: 08/23/2018] [Indexed: 12/11/2022]
Abstract
For patients with severe kidney or liver failure the best solution is currently organ transplantation. However, not all patients are eligible for transplantation and due to limited organ availability, most patients are currently treated with therapies using artificial kidney and artificial liver devices. These therapies, despite their relative success in preserving the patients' life, have important limitations since they can only replace part of the natural kidney or liver functions. As blood detoxification (and other functions) in these highly perfused organs is achieved by specialized cells, it seems relevant to review the approaches leading to bioengineered organs fulfilling most of the native organ functions. There, the culture of cells of specific phenotypes on adapted scaffolds that can be perfused takes place. In this review paper, first the functions of kidney and liver organs are briefly described. Then artificial kidney/liver devices, bioartificial kidney devices, and bioartificial liver devices are focused on, as well as biohybrid constructs obtained by decellularization and recellularization of animal organs. For all organs, a thorough overview of the literature is given and the perspectives for their application in the clinic are discussed.
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Affiliation(s)
- Cécile Legallais
- UMR CNRS 7338 Biomechanics & Bioengineering; Université de technologie de Compiègne; Sorbonne Universités; 60203 Compiègne France
| | - Dooli Kim
- (Bio)artificial organs; Department of Biomaterials Science and Technology; Faculty of Science and Technology; TechMed Institute; University of Twente; P.O. Box 217 7500 AE Enschede The Netherlands
| | - Sylvia M. Mihaila
- Division of Pharmacology; Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Universiteitsweg 99 3584 CG Utrecht The Netherlands
- Department of Nephrology and Hypertension; University Medical Center Utrecht and Regenerative Medicine Utrecht; Utrecht University; Heidelberglaan 100 3584 CX Utrecht The Netherlands
| | - Milos Mihajlovic
- Division of Pharmacology; Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Marina Figliuzzi
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri; via Stezzano 87 24126 Bergamo Italy
| | - Barbara Bonandrini
- Department of Chemistry; Materials and Chemical Engineering “Giulio Natta”; Politecnico di Milano; Piazza Leonardo da Vinci 32 20133 Milan Italy
| | - Simona Salerno
- Institute on Membrane Technology; National Research Council of Italy; ITM-CNR; Via Pietro BUCCI, Cubo 17C - 87036 Rende Italy
| | - Fjodor A. Yousef Yengej
- Department of Nephrology and Hypertension; University Medical Center Utrecht and Regenerative Medicine Utrecht; Utrecht University; Heidelberglaan 100 3584 CX Utrecht The Netherlands
| | - Maarten B. Rookmaaker
- Department of Nephrology and Hypertension; University Medical Center Utrecht and Regenerative Medicine Utrecht; Utrecht University; Heidelberglaan 100 3584 CX Utrecht The Netherlands
| | | | - Pilar Sainz-Arnal
- Instituto de Investigación Sanitaria de Aragón (IIS Aragon); 50009 Zaragoza Spain
- Instituto Aragonés de Ciencias de la Salud (IACS); 50009 Zaragoza Spain
| | - Ulysse Pereira
- UMR CNRS 7338 Biomechanics & Bioengineering; Université de technologie de Compiègne; Sorbonne Universités; 60203 Compiègne France
| | - Mattia Pasqua
- UMR CNRS 7338 Biomechanics & Bioengineering; Université de technologie de Compiègne; Sorbonne Universités; 60203 Compiègne France
| | - Karin G. F. Gerritsen
- Department of Nephrology and Hypertension; University Medical Center Utrecht and Regenerative Medicine Utrecht; Utrecht University; Heidelberglaan 100 3584 CX Utrecht The Netherlands
| | - Marianne C. Verhaar
- Department of Nephrology and Hypertension; University Medical Center Utrecht and Regenerative Medicine Utrecht; Utrecht University; Heidelberglaan 100 3584 CX Utrecht The Netherlands
| | - Andrea Remuzzi
- IRCCS-Istituto di Ricerche Farmacologiche Mario Negri; via Stezzano 87 24126 Bergamo Italy
- Department of Management; Information and Production Engineering; University of Bergamo; viale Marconi 5 24044 Dalmine Italy
| | - Pedro M. Baptista
- Instituto de Investigación Sanitaria de Aragón (IIS Aragon); 50009 Zaragoza Spain
- Department of Management; Information and Production Engineering; University of Bergamo; viale Marconi 5 24044 Dalmine Italy
- Centro de Investigación Biomédica en Red en el Área Temática de Enfermedades Hepáticas (CIBERehd); 28029 Barcelona Spain
- Fundación ARAID; 50009 Zaragoza Spain
- Instituto de Investigación Sanitaria de la Fundación Jiménez Díaz; 28040 Madrid Spain. Department of Biomedical and Aerospace Engineering; Universidad Carlos III de Madrid; 28911 Madrid Spain
| | - Loredana De Bartolo
- Institute on Membrane Technology; National Research Council of Italy; ITM-CNR; Via Pietro BUCCI, Cubo 17C - 87036 Rende Italy
| | - Rosalinde Masereeuw
- Division of Pharmacology; Utrecht Institute for Pharmaceutical Sciences; Utrecht University; Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Dimitrios Stamatialis
- (Bio)artificial organs; Department of Biomaterials Science and Technology; Faculty of Science and Technology; TechMed Institute; University of Twente; P.O. Box 217 7500 AE Enschede The Netherlands
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Bi J, Song K, Wu S, Zhang Y, Wang Y, Liu T. Effect of thermal-responsive surfaces based on PNIPAAm on cell adsorption/desorption. INT J POLYM MATER PO 2018. [DOI: 10.1080/00914037.2016.1252359] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Jiajie Bi
- State Key Laboratory of Fine Chemicals, Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian, China
| | - Kedong Song
- State Key Laboratory of Fine Chemicals, Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian, China
| | - Suli Wu
- State Key Laboratory of Fine Chemicals, Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian, China
| | - Yu Zhang
- State Key Laboratory of Fine Chemicals, Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian, China
| | - Yiwei Wang
- Burns Research Group, ANZAC Research Institute, University of Sydney, Concord, New South Wales, Australia
| | - Tianqing Liu
- State Key Laboratory of Fine Chemicals, Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian, China
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Stravitz RT, Ilan Y. Potential use of metabolic breath tests to assess liver disease and prognosis: has the time arrived for routine use in the clinic? Liver Int 2017; 37:328-336. [PMID: 27718326 DOI: 10.1111/liv.13268] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Accepted: 09/23/2016] [Indexed: 02/13/2023]
Abstract
The progression of liver disease may be unique among organ system diseases in that progressive fibrosis compromises not only the sufficiency of hepatocyte mass but also impairs blood flow to the liver, resulting in porto-systemic shunting. Although liver biopsy as an assessment of fibrosis has become the key biomarker of and target for new therapies, it is invasive and subject to sampling error, and cannot quantify metabolic function or porto-systemic shunting. Measurement of the hepatic venous pressure gradient accommodates some of the deficiencies of biopsy but requires expertise not widely available and misses minor changes in hepatocellular mass and thereby information about metabolic function. Thus, an unmet need in clinical hepatology remains unfulfilled: a noninvasive biomarker which quantitates both the hepatocellular insufficiency and porto-systemic shunting inherent in progressive hepatic fibrosis. Ideally, such a biomarker should correlate with clinical endpoints including liver-related survival and cirrhotic complications, be performed at the point-of-care, and be affordable and easy to use. This review, an expert opinion, summarizes background and recent data suggesting that metabolic breath tests may now meet these requirements and have a valid place in clinical hepatology to supplant the time-honoured assessment of hepatic fibrosis.
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Affiliation(s)
- R Todd Stravitz
- Section of Hepatology, Hume-Lee Transplant Center of Virginia Commonwealth University, Richmond, VA, USA
| | - Yaron Ilan
- Gastroenterology and liver Units, Department of Medicine, Hadassah Hebrew University Medical Center, Jerusalem, Israel
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Schmelzer E, Gerlach JC. Multicompartmental Hollow-Fiber-Based Bioreactors for Dynamic Three-Dimensional Perfusion Culture. Methods Mol Biol 2016; 1502:1-19. [PMID: 27075977 DOI: 10.1007/7651_2016_335] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The creation of larger-scale three-dimensional tissue constructs depends on proper medium mass and gas exchange, as well as removal of metabolites, which cannot be achieved in conventional static two-dimensional petri dish culture. In cultures of tissue-density this problem can be addressed by decentral perfusion through artificial micro-capillaries. While the static medium exchange in petri dishes leads to metabolite peaks, perfusion culture provides a dynamic medium supply, thereby preventing non-physiological peaks. To overcome the limitations of conventional static two-dimensional culture, a three-dimensional perfusion bioreactor technology has been developed, providing decentral and high-performance mass exchange as well as integral oxygenation. Similar to organ systems in vivo, the perfusion with medium provides nutrition and removes waste metabolites, and the perfusion with gas delivers oxygen and carbon dioxide for pH regulation. Such bioreactors are available at various dimensions ranging from 0.2 to 800 mL cell compartment volumes (manufactured by StemCell Systems, Berlin, Germany). Here, we describe in detail the setup and maintenance of a small-scale 4-chamber bioreactor with its tubing circuit and perfusion system.
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Affiliation(s)
- Eva Schmelzer
- University of Pittsburgh, McGowan Institute for Regenerative Medicine, 3025 E. Carson St., Pittsburgh, PA, 15203, USA.
| | - Jörg C Gerlach
- University of Pittsburgh, McGowan Institute for Regenerative Medicine, 3025 E. Carson St., Pittsburgh, PA, 15203, USA
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Gerlach JC, Over P, Foka HG, Turner ME, Thompson RL, Gridelli B, Schmelzer E. Role of transcription factor CCAAT/enhancer-binding protein alpha in human fetal liver cell types in vitro. Hepatol Res 2015; 45:919-32. [PMID: 25195540 DOI: 10.1111/hepr.12420] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 09/02/2014] [Accepted: 09/03/2014] [Indexed: 12/15/2022]
Abstract
AIM The transcription factor CCAAT/enhancer-binding protein alpha (C/EBPα) has been shown to play an important role in liver development, cell proliferation and differentiation. It is, however, largely unknown if C/EBPα regulates cell differentiation and proliferation differently in the diverse cell types of the human liver. We investigated the role of C/EBPα in primary human fetal liver cells and liver cell subpopulations in vitro using a 3-D perfusion bioreactor as an advanced in vivo-like human organ culture model. METHODS Human fetal liver cells were investigated in vitro. C/EBPα gene expression was knocked down using siRNA or overexpressed by plasmid transfection. Cell type-specific gene expression was studied, cell populations and their proliferation were investigated, and metabolic parameters were analyzed. RESULTS When C/EBPα gene expression was knocked down, we observed a significantly reduced expression of typical endothelial, hematopoietic and mesenchymal genes such as CD31, vWF, CD90, CD45 and α-smooth muscle actin in fetal cells. The intracellular expression of hepatic proteins and genes for liver-specific serum proteins α-fetoprotein and albumin were reduced, their protein secretion was increased. Fetal endothelial cell numbers were reduced and hepatoblast numbers were increased. C/EBPα overexpression in fetal cells resulted in increased endothelial numbers, but did not affect mesenchymal cell types or hepatoblasts. CONCLUSION We demonstrated that the effects of C/EBPα are specific for the different human fetal liver cell types, using an advanced 3-D perfusion bioreactor as a human in vivo-like model.
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Affiliation(s)
- Jörg C Gerlach
- Department of Surgery and Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Patrick Over
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Hubert G Foka
- University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - Morris E Turner
- University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - Robert L Thompson
- University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - Bruno Gridelli
- Department of Surgery, ISMETT - Mediterranean Institute for Transplantation and Advanced Specialized Therapies, Palermo, Italy
| | - Eva Schmelzer
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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Durkut S, Elçin AE, Elçin YM. In vitro evaluation of encapsulated primary rat hepatocytes pre- and post-cryopreservation at -80°C and in liquid nitrogen. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2013; 43:50-61. [PMID: 24059456 DOI: 10.3109/21691401.2013.837476] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Encapsulation techniques have the potential to protect hepatocytes from cryoinjury. In this study, we comparatively evaluated the viability and metabolic function of primary rat hepatocytes encapsulated in calcium alginate microbeads, in chitosan tripolyphosphate beads, and in three-layered alginate-chitosan-alginate (ACA) microcapsules, before and after cryopreservation at -80°C and in liquid nitrogen (LN2) for 1 and 3 months. Findings demonstrated that LN2 was atop of -80°C in regard to preservation of viability (> 90%) and hepatic functions. LN2-cryopreserved hepatocytes encapsulated in ACA microcapsules retained metabolic function post-thawing, with > 90% of the albumin, total protein and urea syntheses activities, and > 80% of oxidative function.
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Affiliation(s)
- Serap Durkut
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, and Ankara University Stem Cell Institute , Ankara , Turkey
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Jepsen P, Ott P, Andersen PK, Vilstrup H. The clinical course of alcoholic cirrhosis: effects of hepatic metabolic capacity, alcohol consumption, and hyponatremia--a historical cohort study. BMC Res Notes 2012; 5:509. [PMID: 22988833 PMCID: PMC3494654 DOI: 10.1186/1756-0500-5-509] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Accepted: 09/14/2012] [Indexed: 12/20/2022] Open
Abstract
Background The cirrhosis complications hepatic encephalopathy, ascites, and variceal bleeding increase mortality but develop in random sequence. Therefore prognoses based on the presence or absence of these clinical complications are inherently inaccurate, and other determinants of the clinical course should be identified. Here we present our study of patho-etiological factors that may be causally involved in the development of specific complications to alcoholic cirrhosis; it was based on a model of cirrhosis pathophysiology encompassing hepatic metabolic capacity, continued alcohol consumption, and circulatory dysfunction. Methods We followed a Danish community-based cohort of 466 patients with alcoholic cirrhosis. Stratified Cox regression was used to examine the effects of GEC (a measure of hepatic metabolic capacity), alcohol consumption, and plasma sodium concentration (a measure of circulatory dysfunction) on the hazard rates of first-time hepatic encephalopathy, first-time ascites, first-time variceal bleeding, and mortality. We adjusted for confounding by comorbidity, gender, and age. Data on risk factors and confounders were updated during follow-up. Results A low GEC increased the risk of first-time hepatic encephalopathy (hazard ratio [HR] 1.21 per 0.1 mmol/min GEC loss, 95% CI 1.11-1.31), but was unassociated with other adverse events. Alcohol consumption increased the risk of first-time ascites (HR 3.18, 95% CI 1.19-8.47), first-time variceal bleeding (HR 2.78, 95% CI 1.59-4.87), and mortality (HR 2.45, 95% CI 1.63-3.66), but not the risk of first-time hepatic encephalopathy. Hyponatremia increased the risk of all adverse events. Conclusions Reduced hepatic metabolic capacity, alcohol consumption, and hyponatremia were causally involved in the development of specific complications to alcoholic cirrhosis.
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Affiliation(s)
- Peter Jepsen
- Department of Medicine V (Hepatology and Gastroenterology), Aarhus University Hospital, Aarhus, Denmark.
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Perfusion circuit concepts for hollow-fiber bioreactors used as in vitro cell production systems or ex vivo bioartificial organs. Int J Artif Organs 2011; 34:410-21. [PMID: 21623585 DOI: 10.5301/ijao.2011.8366] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/01/2011] [Indexed: 11/20/2022]
Abstract
For the development and implementation of primary human cell- and stem cell-based applications in regenerative medicine, large amounts of cells with well-defined characteristics are needed. Such cell quantities can be obtained with the use of hollow fiber-based bioreactors. While the use of such bioreactors generally requires a perfusion circuit, the configuration and complexity of such circuits is still in debate. We evaluated various circuit configurations to investigate potential perfusate volume shifts in the arterial and venous sides of the perfusion circuit, as well as in the feed and waste lines. Volume shifts with changes in flow conditions were measured with graduated bubble traps in the circuit, and perfusion pressures were measured at three points in the circuits. The results of this study demonstrate that the bioreactor perfusion circuit configuration has an effect on system pressures and volume shifts in the circuit. During operation, spikes in post-bioreactor pressures caused detrimental, potentially dangerous volume shifts in the feed and waste lines for configurations that lacked feed pumps and/or waste line check valves. Our results indicate that a more complex tubing circuit adds to safety of operation and avoids technical challenges associated with the use of large-scale hollow fiber bioreactors (e.g., for extracorporeal liver support or erythrocyte production from hematopoietic stem cells), including volume shifts and the need for a large reservoir. Finally, to ensure safe use of bioreactors, measuring pre-, intra-, and post-bioreactor pressures, and pump operation control is also advisable, which suggests the use of specifically developed bioreactor perfusion devices.
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Abstract
In this Editor's Review, articles published in 2010 are organized by category and briefly summarized. As the official journal of The International Federation for Artificial Organs, The International Faculty for Artificial Organs, and the International Society for Rotary Blood Pumps, Artificial Organs continues in the original mission of its founders "to foster communications in the field of artificial organs on an international level."Artificial Organs continues to publish developments and clinical applications of artificial organ technologies in this broad and expanding field of organ Replacement, Recovery, and Regeneration from all over the world. We take this time also to express our gratitude to our authors for offering their work to this journal. We offer our very special thanks to our reviewers who give so generously of time and expertise to review, critique, and especially provide such meaningful suggestions to the author's work whether eventually accepted or rejected and especially to those whose native tongue is not English. Without these excellent and dedicated reviewers the quality expected from such a journal could not be possible. We also express our special thanks to our Publisher, Wiley-Blackwell, for their expert attention and support in the production and marketing of Artificial Organs. In this Editor's Review, that historically has been widely received by our readership, we aim to provide a brief reflection of the currently available worldwide knowledge that is intended to advance and better human life while providing insight for continued application of technologies and methods of organ Replacement, Recovery, and Regeneration. We look forward to recording further advances in the coming years.
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Nussler AK, Zeilinger K, Schyschka L, Ehnert S, Gerlach JC, Yan X, Lee SML, Ilowski M, Thasler WE, Weiss TS. Cell therapeutic options in liver diseases: cell types, medical devices and regulatory issues. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:1087-1099. [PMID: 21461918 DOI: 10.1007/s10856-011-4306-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Accepted: 03/24/2011] [Indexed: 05/30/2023]
Abstract
Although significant progress has been made in the field of orthotopic liver transplantation, cell-based therapies seem to be a promising alternative to whole-organ transplantation. The reasons are manifold but organ shortage is the main cause for this approach. However, many problems such as the question which cell type should be used or which application site is best for transplantation have been raised. In addition, some clinicians have had success by cultivating liver cells in bioreactors for temporary life support. Besides answering the question which cell type, which injection site or even which culture form should be used for liver support recent international harmonization of legal requirements is needed to be addressed by clinicians, scientists and companies dealing with cellular therapies. We here briefly summarize the possible cell types used to partially or temporarily correct liver diseases, the most recent development of bioreactor technology and important regulatory issues.
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Affiliation(s)
- Andreas K Nussler
- Department of Traumatology, MRI, Klinikum rechts der Isar, Technische Universität München, Ismaningerstr. 22, 81675, Munich, Germany.
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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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Giri S, Bader A. Improved preclinical safety assessment using micro-BAL devices: the potential impact on human discovery and drug attrition. Drug Discov Today 2011; 16:382-97. [PMID: 21354326 DOI: 10.1016/j.drudis.2011.02.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2010] [Revised: 01/11/2011] [Accepted: 02/21/2011] [Indexed: 02/07/2023]
Abstract
Hepatotoxicity is often unpredictable in the early phase of drug discovery and leads to drug attrition in preclinical and clinical development. Here, we discuss the conventional preclinical liver models that do not mimic in vivo livers. We focus on key components such as new sources of hepatocyte-derived human stem cells, enhanced direct oxygenation, defined biocompatibility nanoscaffolds, organotypical cellular models, dynamic culture, and metabolite status inside and outside the cell for effective configuration for the development of a bioartificial liver (BAL) device to mimic the in vivo liver microenvironment. The potential for development of BAL devices could open up new avenues in: (i) hepatotoxicity assessment for selecting drug candidates during preclinical screening; and (ii) therapeutic approaches for liver cell therapy at the clinical stage.
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Affiliation(s)
- Shibashish Giri
- Centre for Biotechnology and Biomedicine, Department of Cell Techniques and Applied Stem Cell Biology, University of Leipzig, Deutscher Platz 5, D-04103 Leipzig, Germany.
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