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An J, Zhang S, Wu J, Chen H, Xu G, Hou Y, Liu R, Li N, Cui W, Li X, Du Y, Gu Q. Assessing bioartificial organ function: the 3P model framework and its validation. LAB ON A CHIP 2024; 24:1586-1601. [PMID: 38362645 DOI: 10.1039/d3lc01020a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
The rapid advancement in the fabrication and culture of in vitro organs has marked a new era in biomedical research. While strides have been made in creating structurally diverse bioartificial organs, such as the liver, which serves as the focal organ in our study, the field lacks a uniform approach for the predictive assessment of liver function. Our research bridges this gap with the introduction of a novel, machine-learning-based "3P model" framework. This model draws on a decade of experimental data across diverse culture platform studies, aiming to identify critical fabrication parameters affecting liver function, particularly in terms of albumin and urea secretion. Through meticulous statistical analysis, we evaluated the functional sustainability of the in vitro liver models. Despite the diversity of research methodologies and the consequent scarcity of standardized data, our regression model effectively captures the patterns observed in experimental findings. The insights gleaned from our study shed light on optimizing culture conditions and advance the evaluation of the functional maintenance capacity of bioartificial livers. This sets a precedent for future functional evaluations of bioartificial organs using machine learning.
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Affiliation(s)
- Jingmin An
- Key Laboratory of Organ Regeneration and Reconstruction, State Key Laboratory of Membrane Biology, The State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chaoyang District, Beijing, 100101, P. R. China.
- Beijing Institute for Stem Cell and Regenerative Medicine, Chaoyang District, Beijing, 100101, P. R. China
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, P. R. China
| | - Shuyu Zhang
- Key Laboratory of Organ Regeneration and Reconstruction, State Key Laboratory of Membrane Biology, The State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chaoyang District, Beijing, 100101, P. R. China.
- Beijing Institute for Stem Cell and Regenerative Medicine, Chaoyang District, Beijing, 100101, P. R. China
| | - Juan Wu
- Key Laboratory of Organ Regeneration and Reconstruction, State Key Laboratory of Membrane Biology, The State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chaoyang District, Beijing, 100101, P. R. China.
- Beijing Institute for Stem Cell and Regenerative Medicine, Chaoyang District, Beijing, 100101, P. R. China
- University of Chinese Academy of Sciences, Huairou District, Beijing, 100149, P. R. China
| | - Haolin Chen
- Key Laboratory of Organ Regeneration and Reconstruction, State Key Laboratory of Membrane Biology, The State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chaoyang District, Beijing, 100101, P. R. China.
- Beijing Institute for Stem Cell and Regenerative Medicine, Chaoyang District, Beijing, 100101, P. R. China
- University of Chinese Academy of Sciences, Huairou District, Beijing, 100149, P. R. China
| | - Guoshi Xu
- Key Laboratory of Organ Regeneration and Reconstruction, State Key Laboratory of Membrane Biology, The State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chaoyang District, Beijing, 100101, P. R. China.
- Beijing Institute for Stem Cell and Regenerative Medicine, Chaoyang District, Beijing, 100101, P. R. China
- University of Chinese Academy of Sciences, Huairou District, Beijing, 100149, P. R. China
| | - Yifan Hou
- Key Laboratory of Organ Regeneration and Reconstruction, State Key Laboratory of Membrane Biology, The State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chaoyang District, Beijing, 100101, P. R. China.
- Beijing Institute for Stem Cell and Regenerative Medicine, Chaoyang District, Beijing, 100101, P. R. China
- University of Chinese Academy of Sciences, Huairou District, Beijing, 100149, P. R. China
| | - Ruoyu Liu
- Key Laboratory of Organ Regeneration and Reconstruction, State Key Laboratory of Membrane Biology, The State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chaoyang District, Beijing, 100101, P. R. China.
- Beijing Institute for Stem Cell and Regenerative Medicine, Chaoyang District, Beijing, 100101, P. R. China
| | - Na Li
- Computer Network Information Center, Chinese Academy of Sciences, Beijing, 100864, P.R. China.
| | - Wenjuan Cui
- Computer Network Information Center, Chinese Academy of Sciences, Beijing, 100864, P.R. China.
- University of Chinese Academy of Sciences, Huairou District, Beijing, 100149, P. R. China
| | - Xin Li
- Key Laboratory of Organ Regeneration and Reconstruction, State Key Laboratory of Membrane Biology, The State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chaoyang District, Beijing, 100101, P. R. China.
- Beijing Institute for Stem Cell and Regenerative Medicine, Chaoyang District, Beijing, 100101, P. R. China
- University of Chinese Academy of Sciences, Huairou District, Beijing, 100149, P. R. China
| | - Yi Du
- Computer Network Information Center, Chinese Academy of Sciences, Beijing, 100864, P.R. China.
- University of Chinese Academy of Sciences, Huairou District, Beijing, 100149, P. R. China
| | - Qi Gu
- Key Laboratory of Organ Regeneration and Reconstruction, State Key Laboratory of Membrane Biology, The State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chaoyang District, Beijing, 100101, P. R. China.
- Beijing Institute for Stem Cell and Regenerative Medicine, Chaoyang District, Beijing, 100101, P. R. China
- University of Chinese Academy of Sciences, Huairou District, Beijing, 100149, P. R. China
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Recent Advances in Porous 3D Cellulose Aerogels for Tissue Engineering Applications: A Review. JOURNAL OF COMPOSITES SCIENCE 2020. [DOI: 10.3390/jcs4040152] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Current approaches in developing porous 3D scaffolds face various challenges, such as failure of mimicking extracellular matrix (ECM) native building blocks, non-sustainable scaffold fabrication techniques, and lack of functionality. Polysaccharides and proteins are sustainable, inexpensive, biodegradable, and biocompatible, with structural similarities to the ECM. As a result, 3D-structured cellulose (e.g., cellulose nanofibrils, nanocrystals and bacterial nanocellulose)-based aerogels with high porosity and interconnected pores are ideal materials for biomedical applications. Such 3D scaffolds can be prepared using a green, scalable, and cost-effective freeze-drying technique. The physicochemical, mechanical, and biological characteristics of the cellulose can be improved by incorporation of proteins and other polysaccharides. This review will focus on recent developments related to the cellulose-based 3D aerogels prepared by sustainable freeze-drying methods for tissue engineering applications. We will also provide an overview of the scaffold development criteria; parameters that influenced the aerogel production by freeze-drying; and in vitro and in vivo studies of the cellulose-based porous 3D aerogel scaffolds. These efforts could potentially help to expand the role of cellulose-based 3D scaffolds as next-generation biomaterials.
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Afshari A, Shamdani S, Uzan G, Naserian S, Azarpira N. Different approaches for transformation of mesenchymal stem cells into hepatocyte-like cells. Stem Cell Res Ther 2020; 11:54. [PMID: 32033595 PMCID: PMC7007672 DOI: 10.1186/s13287-020-1555-8] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 12/21/2019] [Accepted: 01/07/2020] [Indexed: 01/09/2023] Open
Abstract
Due to the prominent role of the liver in the body and detoxification, its functionality can be affected in an irreversible manner by diseases. This phenomenon renders the liver to stop working, leading to morbidity and mortality. Therefore, liver transplantation is the only way to tackle this issue.In order to compensate for the lack of adequate healthy liver tissue for transplantation, therapeutic approaches such as hepatocyte transplantation have been proposed as an alternative. Recognizing the fact that mesenchymal stem cells are adult stem cells with the capacity to differentiate into several cell types, different methods have been invented to produce hepatocyte-like cells from mesenchymal stem cells. They can be divided into three main categories, such as addition of cytokines and growth factors, genetic modifications, and adjustment of microenvironment as well as physical parameters.In this review, we attempted to introduce diverse efficient methods for differentiating mesenchymal stem cells and their capability for transformation into hepatocyte-like cells.
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Affiliation(s)
- Afsoon Afshari
- Transplant Research Center, Shiraz University of Medical Sciences, Khalili street, Shiraz, Iran
| | - Sara Shamdani
- INSERM UMR-S-MD 1197/Ministry of the Armed Forces, Biomedical Research Institute of the Armed Forces (IRBA), Paul-Brousse Hospital Villejuif and CTSA Clamart, 94807, Villejuif, France.,SivanCell, Tehran, Iran.,CellMedEx, Saint Maur Des Fossés, France
| | - Georges Uzan
- INSERM UMR-S-MD 1197/Ministry of the Armed Forces, Biomedical Research Institute of the Armed Forces (IRBA), Paul-Brousse Hospital Villejuif and CTSA Clamart, 94807, Villejuif, France
| | - Sina Naserian
- INSERM UMR-S-MD 1197/Ministry of the Armed Forces, Biomedical Research Institute of the Armed Forces (IRBA), Paul-Brousse Hospital Villejuif and CTSA Clamart, 94807, Villejuif, France.,SivanCell, Tehran, Iran.,CellMedEx, Saint Maur Des Fossés, France
| | - Negar Azarpira
- Transplant Research Center, Shiraz University of Medical Sciences, Khalili street, Shiraz, Iran.
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Natale A, Vanmol K, Arslan A, Van Vlierberghe S, Dubruel P, Van Erps J, Thienpont H, Buzgo M, Boeckmans J, De Kock J, Vanhaecke T, Rogiers V, Rodrigues RM. Technological advancements for the development of stem cell-based models for hepatotoxicity testing. Arch Toxicol 2019; 93:1789-1805. [PMID: 31037322 DOI: 10.1007/s00204-019-02465-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 04/18/2019] [Indexed: 02/07/2023]
Abstract
Stem cells are characterized by their self-renewal capacity and their ability to differentiate into multiple cell types of the human body. Using directed differentiation strategies, stem cells can now be converted into hepatocyte-like cells (HLCs) and therefore, represent a unique cell source for toxicological applications in vitro. However, the acquired hepatic functionality of stem cell-derived HLCs is still significantly inferior to primary human hepatocytes. One of the main reasons for this is that most in vitro models use traditional two-dimensional (2D) setups where the flat substrata cannot properly mimic the physiology of the human liver. Therefore, 2D-setups are progressively being replaced by more advanced culture systems, which attempt to replicate the natural liver microenvironment, in which stem cells can better differentiate towards HLCs. This review highlights the most recent cell culture systems, including scaffold-free and scaffold-based three-dimensional (3D) technologies and microfluidics that can be employed for culture and hepatic differentiation of stem cells intended for hepatotoxicity testing. These methodologies have shown to improve in vitro liver cell functionality according to the in vivo liver physiology and allow to establish stem cell-based hepatic in vitro platforms for the accurate evaluation of xenobiotics.
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Affiliation(s)
- Alessandra Natale
- Department of In Vitro Toxicology and Dermato-Cosmetology (IVTD), Vrije Universiteit Brussel, Brussels, Belgium
| | - Koen Vanmol
- Brussels Photonics (B-PHOT), Vrije Universiteit Brussel and Flanders Make, Brussels, Belgium
| | - Aysu Arslan
- Polymer Chemistry and Biomaterials Group (PBM), Centre of Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - Sandra Van Vlierberghe
- Brussels Photonics (B-PHOT), Vrije Universiteit Brussel and Flanders Make, Brussels, Belgium
- Polymer Chemistry and Biomaterials Group (PBM), Centre of Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - Peter Dubruel
- Polymer Chemistry and Biomaterials Group (PBM), Centre of Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - Jürgen Van Erps
- Brussels Photonics (B-PHOT), Vrije Universiteit Brussel and Flanders Make, Brussels, Belgium
| | - Hugo Thienpont
- Brussels Photonics (B-PHOT), Vrije Universiteit Brussel and Flanders Make, Brussels, Belgium
| | | | - Joost Boeckmans
- Department of In Vitro Toxicology and Dermato-Cosmetology (IVTD), Vrije Universiteit Brussel, Brussels, Belgium
| | - Joery De Kock
- Department of In Vitro Toxicology and Dermato-Cosmetology (IVTD), Vrije Universiteit Brussel, Brussels, Belgium
| | - Tamara Vanhaecke
- Department of In Vitro Toxicology and Dermato-Cosmetology (IVTD), Vrije Universiteit Brussel, Brussels, Belgium
| | - Vera Rogiers
- Department of In Vitro Toxicology and Dermato-Cosmetology (IVTD), Vrije Universiteit Brussel, Brussels, Belgium
| | - Robim M Rodrigues
- Department of In Vitro Toxicology and Dermato-Cosmetology (IVTD), Vrije Universiteit Brussel, Brussels, Belgium.
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Kokorev О, Hodorenko V, Chekalkin T, Gunther V, Kang SB, Chang MJ, Kang JH. Evaluation of allogenic hepato-tissue engineered in porous TiNi-based scaffolds for liver regeneration in a CCl
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-induced cirrhosis rat model. Biomed Phys Eng Express 2019. [DOI: 10.1088/2057-1976/aae974] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Li S, Han Y, Lei H, Zeng Y, Cui Z, Zeng Q, Zhu D, Lian R, Zhang J, Chen Z, Chen J. In vitro biomimetic platforms featuring a perfusion system and 3D spheroid culture promote the construction of tissue-engineered corneal endothelial layers. Sci Rep 2017; 7:777. [PMID: 28396609 PMCID: PMC5429708 DOI: 10.1038/s41598-017-00914-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 03/16/2017] [Indexed: 11/08/2022] Open
Abstract
Corneal endothelial cells (CECs) are very important for the maintenance of corneal transparency. However, in vitro, CECs display limited proliferation and loss of phenotype via endothelial to mesenchymal transformation (EMT) and cellular senescence. In this study, we demonstrate that continuous supplementary nutrition using a perfusion culture bioreactor and three-dimensional (3D) spheroid culture can be used to improve CEC expansion in culture and to construct a tissue-engineered CEC layer. Compared with static culture, perfusion-derived CECs exhibited an increased proliferative ability as well as formed close cell-cell contact junctions and numerous surface microvilli. We also demonstrated that the CEC spheroid culture significantly down-regulated gene expression of the proliferation marker Ki67 and EMT-related markers Vimentin and α-SMA, whereas the gene expression level of the CEC marker ATP1A1 was significantly up-regulated. Furthermore, use of the perfusion system in conjunction with a spheroid culture on decellularized corneal scaffolds and collagen sheets promoted the generation of CEC monolayers as well as neo-synthesized ECM formation. This study also confirmed that a CEC spheroid culture on a curved collagen sheet with controlled physiological intraocular pressure could generate a CEC monolayer. Thus, our results show that the use of a perfusion system and 3D spheroid culture can promote CEC expansion and the construction of tissue-engineered corneal endothelial layers in vitro.
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Affiliation(s)
- Shanyi Li
- Key Laboratory for Regenerative Medicine, Ministry of Education, Jinan University, Guangzhou, 510632, P.R. China
| | - Yuting Han
- The Department of Ophthalmology, the First Clinical Medical College, Jinan University, Guangzhou, 510632, P.R. China
| | - Hao Lei
- Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Educational Institutes, Jinan University, Guangzhou, 510632, P.R. China
| | - Yingxin Zeng
- Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Educational Institutes, Jinan University, Guangzhou, 510632, P.R. China
- Department of Applied Physics, South China Agricultural University, Guangzhou, 510632, P.R. China
| | - Zekai Cui
- Key Laboratory for Regenerative Medicine, Ministry of Education, Jinan University, Guangzhou, 510632, P.R. China
| | - Qiaolang Zeng
- The Department of Ophthalmology, the First Clinical Medical College, Jinan University, Guangzhou, 510632, P.R. China
| | - Deliang Zhu
- Key Laboratory for Regenerative Medicine, Ministry of Education, Jinan University, Guangzhou, 510632, P.R. China
| | - Ruiling Lian
- The Department of Ophthalmology, the First Clinical Medical College, Jinan University, Guangzhou, 510632, P.R. China
| | - Jun Zhang
- Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Educational Institutes, Jinan University, Guangzhou, 510632, P.R. China
| | - Zhe Chen
- Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Educational Institutes, Jinan University, Guangzhou, 510632, P.R. China.
| | - Jiansu Chen
- Key Laboratory for Regenerative Medicine, Ministry of Education, Jinan University, Guangzhou, 510632, P.R. China.
- Institute of Ophthalmology, Medical College, Jinan University, Jinan University, Guangzhou, 510632, P.R. China.
- The Department of Ophthalmology, the First Clinical Medical College, Jinan University, Guangzhou, 510632, P.R. China.
- Aier Eye Institute, #198 Furong Middle Road, Changsha, 410015, P.R. China.
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Yen MH, Wu YY, Liu YS, Rimando M, Ho JHC, Lee OKS. Efficient generation of hepatic cells from mesenchymal stromal cells by an innovative bio-microfluidic cell culture device. Stem Cell Res Ther 2016; 7:120. [PMID: 27542358 PMCID: PMC4992324 DOI: 10.1186/s13287-016-0371-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 07/20/2016] [Indexed: 12/30/2022] Open
Abstract
Background Mesenchymal stromal cells (MSCs) are multipotent and have great potential in cell therapy. Previously we reported the differentiation potential of human MSCs into hepatocytes in vitro and that these cells can rescue fulminant hepatic failure. However, the conventional static culture method neither maintains growth factors at an optimal level constantly nor removes cellular waste efficiently. In addition, not only is the duration of differentiating hepatocyte lineage cells from MSCs required to improve, but also the need for a large number of hepatocytes for cell therapy has not to date been addressed fully. The purpose of this study is to design and develop an innovative microfluidic device to overcome these shortcomings. Methods We designed and fabricated a microfluidic device and a culture system for hepatic differentiation of MSCs using our protocol reported previously. The microfluidic device contains a large culture chamber with a stable uniform flow to allow homogeneous distribution and expansion as well as efficient induction of hepatic differentiation for MSCs. Results The device enables real-time observation under light microscopy and exhibits a better differentiation efficiency for MSCs compared with conventional static culture. MSCs grown in the microfluidic device showed a higher level of hepatocyte marker gene expression under hepatic induction. Functional analysis of hepatic differentiation demonstrated significantly higher urea production in the microfluidic device after 21 days of hepatic differentiation. Conclusions The microfluidic device allows the generation of a large number of MSCs and induces hepatic differentiation of MSCs efficiently. The device can be adapted for scale-up production of hepatic cells from MSCs for cellular therapy. Electronic supplementary material The online version of this article (doi:10.1186/s13287-016-0371-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Meng-Hua Yen
- Institute of Clinical Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei, 112, Taiwan (Republic of China)
| | - Yuan-Yi Wu
- Institute of Clinical Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei, 112, Taiwan (Republic of China)
| | - Yi-Shiuan Liu
- Stem Cell Research Center, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei, 112, Taiwan (Republic of China)
| | - Marilyn Rimando
- Taiwan International Graduate Program, National Yang Ming University and Academia Sinica, No. 155, Sec. 2, Linong Street, Taipei, 112, Taiwan (Republic of China)
| | - Jennifer Hui-Chun Ho
- Center for Stem Cell Research, Wan Fang Hospital, Taipei Medical University, No. 111, Section 3, Hsing-Long Rd, Taipei, 116, Taiwan (Republic of China). .,Graduate Institute of Clinical Medicine, Taipei Medical University, No. 250 Wuxing Street, Taipei City, 110, Taiwan (Republic of China). .,Department of Ophthalmology, Wan Fang Hospital, Taipei Medical University, No. 111, Sec. 3, Hsing-Long Rd, Taipei, 116, Taiwan (Republic of China).
| | - Oscar Kuang-Sheng Lee
- Institute of Clinical Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong Street, Taipei, 112, Taiwan (Republic of China). .,Department of Medical Research, Taipei Veterans General Hospital, No. 201, Sec. 2, Shipai Rd, Beitou District, Taipei City, 112, Taiwan (Republic of China). .,Taipei City Hospital, No. 145, Zhengzhou Rd, Datong Dist., Taipei, 103, Taiwan (Republic of China).
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Rossi F, Santoro M, Perale G. Polymeric scaffolds as stem cell carriers in bone repair. J Tissue Eng Regen Med 2013; 9:1093-119. [DOI: 10.1002/term.1827] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Revised: 07/29/2013] [Accepted: 08/30/2013] [Indexed: 12/16/2022]
Affiliation(s)
- Filippo Rossi
- Department of Chemistry, Materials and Chemical Engineering; 'Giulio Natta' Politecnico di Milano; Milan Italy
| | - Marco Santoro
- Department of Chemical and Biomolecular Engineering; Rice University; Houston TX USA
| | - Giuseppe Perale
- Department of Chemistry, Materials and Chemical Engineering; 'Giulio Natta' Politecnico di Milano; Milan Italy
- Department of Innovative Technologies; University of Southern Switzerland; Manno Switzerland
- Swiss Institute for Regenerative Medicine; Taverne Switzerland
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Fraczek J, Bolleyn J, Vanhaecke T, Rogiers V, Vinken M. Primary hepatocyte cultures for pharmaco-toxicological studies: at the busy crossroad of various anti-dedifferentiation strategies. Arch Toxicol 2012; 87:577-610. [PMID: 23242478 DOI: 10.1007/s00204-012-0983-3] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 11/19/2012] [Indexed: 01/24/2023]
Abstract
Continuously increasing understanding of the molecular triggers responsible for the onset of diseases, paralleled by an equally dynamic evolution of chemical synthesis and screening methods, offers an abundance of pharmacological agents with a potential to become new successful drugs. However, before patients can benefit of newly developed pharmaceuticals, stringent safety filters need to be applied to weed out unfavourable drug candidates. Cost effectiveness and the need to identify compound liabilities, without exposing humans to unnecessary risks, has stimulated the shift of the safety studies to the earliest stages of drug discovery and development. In this regard, in vivo relevant organotypic in vitro models have high potential to revolutionize the preclinical safety testing. They can enable automation of the process, to match the requirements of high-throughput screening approaches, while satisfying ethical considerations. Cultures of primary hepatocytes became already an inherent part of the preclinical pharmaco-toxicological testing battery, yet their routine use, particularly for long-term assays, is limited by the progressive deterioration of liver-specific features. The availability of suitable hepatic and other organ-specific in vitro models is, however, of paramount importance in the light of changing European legal regulations in the field of chemical compounds of different origin, which gradually restrict the use of animal studies for safety assessment, as currently witnessed in cosmetic industry. Fortunately, research groups worldwide spare no effort to establish hepatic in vitro systems. In the present review, both classical and innovative methodologies to stabilize the in vivo-like hepatocyte phenotype in culture of primary hepatocytes are presented and discussed.
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Affiliation(s)
- J Fraczek
- Department of Toxicology, Faculty of Medicine and Pharmacy, Centre for Pharmaceutical Research, Vrije Universiteit Brussel, Belgium.
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Allameh A, Kazemnejad S. Safety evaluation of stem cells used for clinical cell therapy in chronic liver diseases; with emphasize on biochemical markers. Clin Biochem 2012; 45:385-96. [PMID: 22306885 DOI: 10.1016/j.clinbiochem.2012.01.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Revised: 01/16/2012] [Accepted: 01/18/2012] [Indexed: 12/11/2022]
Abstract
There are several issues to be considered to reduce the risk of rejection and minimize side effects associated with liver cell transplantation in chronic liver diseases. The source and the condition of stem cell proliferation and differentiation ex vivo and the transplantation protocols are important safety considerations for cell based therapy. The biochemical and molecular markers are important tools for safety evaluation of different processes of cell expansion and transplantation. Studies show that hepatocytes differentiated from adult and embryonic stem cells exhibit biochemical and metabolic properties resembling mature hepatocytes. Therefore these assays can help to assess the biological and metabolic performance of hepatocytes and progenitor stem cells. The assays also help in testing the contribution of transplanted hepatocytes in improving the repair and function of damaged liver in the recipient. Here we review the biochemical and metabolic markers, which are implicated in evaluation of safety issues of stem cells used for therapeutic purposes in chronic liver diseases and regeneration of damaged liver. We also highlight application of biochemical tests for assessment of liver cell transplantation.
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Affiliation(s)
- Abdolamir Allameh
- Department of Clinical Biochemistry, Faculty of Medical Sciences, Tarbiat Modares University, PO Box 14115-111, Tehran, Islamic Republic of Iran.
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