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Kooshki S, Mirzaeian L, Malakhond MK, Goudarzi I, Ghorbanian MT. The effect of vitamin E on ethanol-induced liver damage in rats. Biol Futur 2024:10.1007/s42977-024-00226-2. [PMID: 38937316 DOI: 10.1007/s42977-024-00226-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 06/19/2024] [Indexed: 06/29/2024]
Abstract
Ethanol can have harmful effects on the development of the embryos. The aim of this study was to evaluate the effect of vitamin E, as an antioxidant, on changes in liver tissue damaged by ethanol in rats. Rats were divided into 11 groups, control, naive, sunflower oil (oil), ethanol, vitamin E (100, 200, and 400 mg/kg), ethanol + vitamin E (100, 200, and 400 mg/kg), and oily ethanol. In the experimental groups, rats received ethanol (v/v 40%) and vitamin E (100, 200, and 400 mg/kg) orally once a day from gestational day 0 to 28 days after delivery. Then, we evaluated the weight of rats and their offspring, the number of offspring, and the level of malondialdehyde (MDA), as an index of lipid peroxidation, superoxide dismutase (SOD), and glutathione peroxidase (GPX), as antioxidant enzymes, in the liver tissue of the offspring. Vitamin E significantly increases in weight of pregnant mothers and their offspring on the 21st day of pregnancy. The level of MDA in the groups receiving vitamin E was significantly reduced compared to the ethanol group. The activity of GPx and SOD antioxidants enzymes was significantly increased in the offspring. Vitamin E could reduce ethanol-induced liver damage in male offspring by reducing oxidative stress.
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Affiliation(s)
- Sajjad Kooshki
- Department of Cellular and Molecular Biology, School of Biology, Damghan University, Damghan, Iran
| | - Leila Mirzaeian
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran.
| | | | - Iran Goudarzi
- Department of Cellular and Molecular Biology, School of Biology, Damghan University, Damghan, Iran
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Ali AS, Wu D, Bannach-Brown A, Dhamrait D, Berg J, Tolksdorf B, Lichtenstein D, Dressler C, Braeuning A, Kurreck J, Hülsemann M. 3D bioprinting of liver models: A systematic scoping review of methods, bioinks, and reporting quality. Mater Today Bio 2024; 26:100991. [PMID: 38558773 PMCID: PMC10978534 DOI: 10.1016/j.mtbio.2024.100991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 01/19/2024] [Accepted: 02/03/2024] [Indexed: 04/04/2024] Open
Abstract
Background Effective communication is crucial for broad acceptance and applicability of alternative methods in 3R biomedical research and preclinical testing. 3D bioprinting is used to construct intricate biological structures towards functional liver models, specifically engineered for deployment as alternative models in drug screening, toxicological investigations, and tissue engineering. Despite a growing number of reviews in this emerging field, a comprehensive study, systematically assessing practices and reporting quality for bioprinted liver models is missing. Methods In this systematic scoping review we systematically searched MEDLINE (Ovid), EMBASE (Ovid) and BioRxiv for studies published prior to June 2nd, 2022. We extracted data on methodological conduct, applied bioinks, the composition of the printed model, performed experiments and model applications. Records were screened for eligibility and data were extracted from included articles by two independent reviewers from a panel of seven domain experts specializing in bioprinting and liver biology. We used RAYYAN for the screening process and SyRF for data extraction. We used R for data analysis, and R and Graphpad PRISM for visualization. Results Through our systematic database search we identified 1042 records, from which 63 met the eligibility criteria for inclusion in this systematic scoping review. Our findings revealed that extrusion-based printing, in conjunction with bioinks composed of natural components, emerged as the predominant printing technique in the bioprinting of liver models. Notably, the HepG2 hepatoma cell line was the most frequently employed liver cell type, despite acknowledged limitations. Furthermore, 51% of the printed models featured co-cultures with non-parenchymal cells to enhance their complexity. The included studies offered a variety of techniques for characterizing these liver models, with their primary application predominantly focused on toxicity testing. Among the frequently analyzed liver markers, albumin and urea stood out. Additionally, Cytochrome P450 (CYP) isoforms, primarily CYP3A and CYP1A, were assessed, and select studies employed nuclear receptor agonists to induce CYP activity. Conclusion Our systematic scoping review offers an evidence-based overview and evaluation of the current state of research on bioprinted liver models, representing a promising and innovative technology for creating alternative organ models. We conducted a thorough examination of both the methodological and technical facets of model development and scrutinized the reporting quality within the realm of bioprinted liver models. This systematic scoping review can serve as a valuable template for systematically evaluating the progress of organ model development in various other domains. The transparently derived evidence presented here can provide essential support to the research community, facilitating the adaptation of technological advancements, the establishment of standards, and the enhancement of model robustness. This is particularly crucial as we work toward the long-term objective of establishing new approach methods as reliable alternatives to animal testing, with extensive and versatile applications.
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Affiliation(s)
- Ahmed S.M. Ali
- Department of Applied Biochemistry, Institute of Biotechnology, Technische Universität Berlin, Germany
| | - Dongwei Wu
- Department of Applied Biochemistry, Institute of Biotechnology, Technische Universität Berlin, Germany
| | - Alexandra Bannach-Brown
- Berlin Institute of Health (BIH) @Charité, QUEST Center for Responsible Research, Berlin, Germany
| | - Diyal Dhamrait
- Berlin Institute of Health (BIH) @Charité, QUEST Center for Responsible Research, Berlin, Germany
| | - Johanna Berg
- Department of Applied Biochemistry, Institute of Biotechnology, Technische Universität Berlin, Germany
| | - Beatrice Tolksdorf
- Department of Applied Biochemistry, Institute of Biotechnology, Technische Universität Berlin, Germany
| | - Dajana Lichtenstein
- German Federal Institute for Risk Assessment (BfR), Department Food Safety, Berlin, Germany
| | - Corinna Dressler
- Charité – Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin, Medical Library, Germany
| | - Albert Braeuning
- German Federal Institute for Risk Assessment (BfR), Department Food Safety, Berlin, Germany
| | - Jens Kurreck
- Department of Applied Biochemistry, Institute of Biotechnology, Technische Universität Berlin, Germany
| | - Maren Hülsemann
- Berlin Institute of Health (BIH) @Charité, QUEST Center for Responsible Research, Berlin, Germany
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3
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Yan Y, Chen Q, Dai X, Xiang Z, Long Z, Wu Y, Jiang H, Zou J, Wang M, Zhu Z. Amino acid metabolomics and machine learning for assessment of post-hepatectomy liver regeneration. Front Pharmacol 2024; 15:1345099. [PMID: 38855741 PMCID: PMC11157015 DOI: 10.3389/fphar.2024.1345099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 05/06/2024] [Indexed: 06/11/2024] Open
Abstract
Objective Amino acid (AA) metabolism plays a vital role in liver regeneration. However, its measuring utility for post-hepatectomy liver regeneration under different conditions remains unclear. We aimed to combine machine learning (ML) models with AA metabolomics to assess liver regeneration in health and non-alcoholic steatohepatitis (NASH). Methods The liver index (liver weight/body weight) was calculated following 70% hepatectomy in healthy and NASH mice. The serum levels of 39 amino acids were measured using ultra-high performance liquid chromatography-tandem mass spectrometry analysis. We used orthogonal partial least squares discriminant analysis to determine differential AAs and disturbed metabolic pathways during liver regeneration. The SHapley Additive exPlanations algorithm was performed to identify potential AA signatures, and five ML models including least absolute shrinkage and selection operator, random forest, K-nearest neighbor (KNN), support vector regression, and extreme gradient boosting were utilized to assess the liver index. Results Eleven and twenty-two differential AAs were identified in the healthy and NASH groups, respectively. Among these metabolites, arginine and proline metabolism were commonly disturbed metabolic pathways related to liver regeneration in both groups. Five AA signatures were identified, including hydroxylysine, L-serine, 3-methylhistidine, L-tyrosine, and homocitrulline in healthy group, and L-arginine, 2-aminobutyric acid, sarcosine, beta-alanine, and L-cysteine in NASH group. The KNN model demonstrated the best evaluation performance with mean absolute error, root mean square error, and coefficient of determination values of 0.0037, 0.0047, 0.79 and 0.0028, 0.0034, 0.71 for the healthy and NASH groups, respectively. Conclusion The KNN model based on five AA signatures performed best, which suggests that it may be a valuable tool for assessing post-hepatectomy liver regeneration in health and NASH.
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Affiliation(s)
- Yuqing Yan
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
- Department of Clinical Pharmacology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Qianping Chen
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
- Department of Clinical Pharmacology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Xiaoming Dai
- The First Affiliated Hospital, Department of Hepatobiliary Surgery, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Zhiqiang Xiang
- The First Affiliated Hospital, Department of Hepatobiliary Surgery, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Zhangtao Long
- The First Affiliated Hospital, Department of Hepatobiliary Surgery, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Yachen Wu
- The First Affiliated Hospital, Department of Hepatobiliary Surgery, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Hui Jiang
- Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Jianjun Zou
- Department of Clinical Pharmacology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
- Department of Pharmacy, Nanjing First Hospital, China Pharmaceutical University, Nanjing, China
| | - Mu Wang
- The NanHua Affiliated Hospital, Clinical Research Institute, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Zhu Zhu
- The First Affiliated Hospital, Department of Hepatobiliary Surgery, Hengyang Medical School, University of South China, Hengyang, Hunan, China
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Davoodi P, Rezaei N, Hassan M, Hay DC, Vosough M. Bioengineering vascularized liver tissue for biomedical research and application. Scand J Gastroenterol 2024; 59:623-629. [PMID: 38319110 DOI: 10.1080/00365521.2024.2310172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 01/20/2024] [Indexed: 02/07/2024]
Abstract
The liver performs a wide range of biological functions that are essential to body homeostasis. Damage to liver tissue can result in reduced organ function, and if chronic in nature can lead to organ scarring and progressive disease. Currently, donor liver transplantation is the only longterm treatment for end-stage liver disease. However, orthotopic organ transplantation suffers from several drawbacks that include organ scarcity and lifelong immunosuppression. Therefore, new therapeutic strategies are required. One promising strategy is the engineering of implantable and vascularized liver tissue. This resource could also be used to build the next generation of liver tissue models to better understand human health, disease and aging in vitro. This article reviews recent progress in the field of liver tissue bioengineering, including microfluidic-based systems, bio-printed vascularized tissue, liver spheroids and organoid models, and the induction of angiogenesis in vivo.
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Affiliation(s)
- Parsa Davoodi
- Department of Regenerative Medicine, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Niloofar Rezaei
- Department of Regenerative Medicine, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Moustapha Hassan
- Experimental Cancer Medicine, Institution for Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
| | - David C Hay
- Centre for Regenerative Medicine, Institute for Repair and Regeneration, University of Edinburgh, Edinburgh, UK
| | - Massoud Vosough
- Department of Regenerative Medicine, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
- Experimental Cancer Medicine, Institution for Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
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5
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Zhou XQ, Li YP, Dang SS. Precision targeting in hepatocellular carcinoma: Exploring ligand-receptor mediated nanotherapy. World J Hepatol 2024; 16:164-176. [PMID: 38495282 PMCID: PMC10941735 DOI: 10.4254/wjh.v16.i2.164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/10/2024] [Accepted: 01/18/2024] [Indexed: 02/27/2024] Open
Abstract
Hepatocellular carcinoma (HCC) is the most common primary liver cancer and poses a major challenge to global health due to its high morbidity and mortality. Conventional chemotherapy is usually targeted to patients with intermediate to advanced stages, but it is often ineffective and suffers from problems such as multidrug resistance, rapid drug clearance, nonspecific targeting, high side effects, and low drug accumulation in tumor cells. In response to these limitations, recent advances in nanoparticle-mediated targeted drug delivery technologies have emerged as breakthrough approaches for the treatment of HCC. This review focuses on recent advances in nanoparticle-based targeted drug delivery systems, with special attention to various receptors overexpressed on HCC cells. These receptors are key to enhancing the specificity and efficacy of nanoparticle delivery and represent a new paradigm for actively targeting and combating HCC. We comprehensively summarize the current understanding of these receptors, their role in nanoparticle targeting, and the impact of such targeted therapies on HCC. By gaining a deeper understanding of the receptor-mediated mechanisms of these innovative therapies, more effective and precise treatment of HCC can be achieved.
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Affiliation(s)
- Xia-Qing Zhou
- Department of Infectious Diseases, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Ya-Ping Li
- Department of Infectious Diseases, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Shuang-Suo Dang
- Department of Infectious Diseases, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, Shaanxi Province, China.
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6
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Zheng F, Zhao T, Liu Z. Acute and 90-day toxicological safety assessment of Shang-Ke-Huang-Shui lotion in New Zealand White rabbits. JOURNAL OF ETHNOPHARMACOLOGY 2024; 319:117027. [PMID: 37704118 DOI: 10.1016/j.jep.2023.117027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 08/02/2023] [Accepted: 08/09/2023] [Indexed: 09/15/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Shang-Ke-Huang-Shui lotion (SKHS), an experiential formula based on the theory of traditional Chinese medicine as a hospital preparation, combines Coptidis Rhizoma, Phellodendri Chinensis Cortex, Gardeniae Fructus, Arnebiae Radix, Menthae Haplocalycis Herba and Alumen. While it has acquired positive effects on the treatment of soft tissue injuries, there is no systematic safety assessment in recent studies. AIM OF THE STUDY The study aimed to investigate the acute and long-term toxicity in New Zealand White rabbits using topical administration of SKHS. MATERIALS AND METHODS In the acute toxicity study, rabbits were given topical administration of SKHS extract (2.775 g crude drug/mL) 3 times daily in normal and broken skin. In the long-term toxicity study, rabbits underwent topical administration of SKHS extract (1.390, 0.694, 0.139 g crude drug/mL) 1 time per day in normal and broken skin for 90 days. Their general behavior, body weight, food intake, biochemical and hematologic parameters, organ coefficients, and pathological morphology were analyzed. RESULTS Mild skin irritation was observed in rabbits with normal or broken skin following acute exposure to the high dose of SKHS. Evidence of toxicity was not observed in the rabbits exposed to SKHS for an extended period. Although some parameters have been significant changes, they cannot be considered treatment-related because they have remained within normal limits. CONCLUSION Topical administration of SKHS could be considered relatively safe and did not reveal any severe toxicity or side effects in this study.
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Affiliation(s)
- Fanghao Zheng
- The Eighth School of Clinical Medicine, Guangzhou University of Chinese Medicine, Foshan, 528000, PR China.
| | - Tingting Zhao
- The Eighth School of Clinical Medicine, Guangzhou University of Chinese Medicine, Foshan, 528000, PR China
| | - Zhenyang Liu
- The Eighth School of Clinical Medicine, Guangzhou University of Chinese Medicine, Foshan, 528000, PR China
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Carvalho AM, Bansal R, Barrias CC, Sarmento B. The Material World of 3D-Bioprinted and Microfluidic-Chip Models of Human Liver Fibrosis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2307673. [PMID: 37961933 DOI: 10.1002/adma.202307673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 11/06/2023] [Indexed: 11/15/2023]
Abstract
Biomaterials are extensively used to mimic cell-matrix interactions, which are essential for cell growth, function, and differentiation. This is particularly relevant when developing in vitro disease models of organs rich in extracellular matrix, like the liver. Liver disease involves a chronic wound-healing response with formation of scar tissue known as fibrosis. At early stages, liver disease can be reverted, but as disease progresses, reversion is no longer possible, and there is no cure. Research for new therapies is hampered by the lack of adequate models that replicate the mechanical properties and biochemical stimuli present in the fibrotic liver. Fibrosis is associated with changes in the composition of the extracellular matrix that directly influence cell behavior. Biomaterials could play an essential role in better emulating the disease microenvironment. In this paper, the recent and cutting-edge biomaterials used for creating in vitro models of human liver fibrosis are revised, in combination with cells, bioprinting, and/or microfluidics. These technologies have been instrumental to replicate the intricate structure of the unhealthy tissue and promote medium perfusion that improves cell growth and function, respectively. A comprehensive analysis of the impact of material hints and cell-material interactions in a tridimensional context is provided.
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Affiliation(s)
- Ana Margarida Carvalho
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, Porto, 4200-135, Portugal
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, Porto, 4200-135, Portugal
- ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, Porto, 4050-313, Portugal
| | - Ruchi Bansal
- Translational Liver Research, Department of Medical Cell Biophysics, Technical Medical Center, Faculty of Science and Technology, University of Twente, Enschede, 7522 NB, The Netherlands
| | - Cristina C Barrias
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, Porto, 4200-135, Portugal
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, Porto, 4200-135, Portugal
- ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, Porto, 4050-313, Portugal
| | - Bruno Sarmento
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, Porto, 4200-135, Portugal
- INEB - Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 208, Porto, 4200-135, Portugal
- IUCS - Instituto Universitário de Ciências da Saúde, CESPU, Rua Central de Gandra 1317, Gandra, 4585-116, Portugal
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Wu Y, Zhao Y, Islam K, Zhou Y, Omidi S, Berdichevsky Y, Liu Y. Acoustofluidic Engineering of Functional Vessel-on-a-Chip. ACS Biomater Sci Eng 2023; 9:6273-6281. [PMID: 37787770 PMCID: PMC10646832 DOI: 10.1021/acsbiomaterials.3c00925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 09/18/2023] [Indexed: 10/04/2023]
Abstract
Construction of in vitro vascular models is of great significance to various biomedical research, such as pharmacokinetics and hemodynamics, and thus is an important direction in the tissue engineering field. In this work, a standing surface acoustic wave field was constructed to spatially arrange suspended endothelial cells into a designated acoustofluidic pattern. The cell patterning was maintained after the acoustic field was withdrawn within the solidified hydrogel. Then, interstitial flow was provided to activate vessel tube formation. In this way, a functional vessel network with specific vessel geometry was engineered on-chip. Vascular function, including perfusability and vascular barrier function, was characterized by microbead loading and dextran diffusion, respectively. A computational atomistic simulation model was proposed to illustrate how solutes cross the vascular membrane lipid bilayer. The reported acoustofluidic methodology is capable of facile and reproducible fabrication of the functional vessel network with specific geometry and high resolution. It is promising to facilitate the development of both fundamental research and regenerative therapy.
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Affiliation(s)
- Yue Wu
- Department
of Bioengineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Yuwen Zhao
- Department
of Bioengineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Khayrul Islam
- Department
of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Yuyuan Zhou
- Department
of Bioengineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Saeed Omidi
- Department
of Bioengineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Yevgeny Berdichevsky
- Department
of Bioengineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
- Department
of Electrical and Computer Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Yaling Liu
- Department
of Bioengineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
- Department
of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, Pennsylvania 18015, United States
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Tithof J, Pruett TL, Rao JS. Lumped parameter liver simulation to predict acute haemodynamic alterations following partial resections. J R Soc Interface 2023; 20:20230444. [PMID: 37876272 PMCID: PMC10598422 DOI: 10.1098/rsif.2023.0444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 10/02/2023] [Indexed: 10/26/2023] Open
Abstract
Partial liver resections are routinely performed in living donor liver transplantation and to debulk tumours in liver malignancies, but surgical decisions on vessel reconstruction for adequate inflow and outflow are challenging. Pre-operative evaluation is often limited to radiological imaging, which fails to account for post-resection haemodynamic alterations. Substantial evidence suggests post-surgical increase in local volume flow rate enhances shear stress, signalling hepatic regeneration, but excessive shear stress has been postulated to result in small for size syndrome and liver failure. Predicting haemodynamic alterations throughout the liver is particularly challenging due to the dendritic architecture of the vasculature, spanning several orders of magnitude in diameter. Therefore, we developed a mathematical lumped parameter model with realistic heterogeneities capturing inflow/outflow of the human liver to simulate acute perfusion alterations following surgical resection. Our model is parametrized using clinical measurements, relies on a single free parameter and accurately captures established perfusion characteristics. We quantify acute changes in volume flow rate, flow speed and wall shear stress following variable, realistic liver resections and make comparisons with the intact liver. Our numerical model runs in minutes and can be adapted to patient-specific anatomy, providing a novel computational tool aimed at assisting pre- and intra-operative surgical decisions for liver resections.
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Affiliation(s)
- Jeffrey Tithof
- Department of Mechanical Engineering, University of Minnesota, 111 Church Street SE, Minneapolis, MN 55455, USA
| | - Timothy L. Pruett
- Division of Solid Organ Transplantation, Department of Surgery, University of Minnesota, Minneapolis, MN, USA
| | - Joseph Sushil Rao
- Division of Solid Organ Transplantation, Department of Surgery, University of Minnesota, Minneapolis, MN, USA
- Schulze Diabetes Institute, Department of Surgery, University of Minnesota, 420 Delaware Street SE, Minneapolis, MN 55455, USA
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10
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Safraou Y, Krehl K, Meyer T, Mehrgan S, Jordan JEL, Tzschätzsch H, Fischer T, Asbach P, Braun J, Sack I, Guo J. The influence of static portal pressure on liver biophysical properties. Acta Biomater 2023; 169:118-129. [PMID: 37507032 DOI: 10.1016/j.actbio.2023.07.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 07/03/2023] [Accepted: 07/21/2023] [Indexed: 07/30/2023]
Abstract
The liver is a highly vascularized organ where fluid properties, including vascular pressure, vessel integrity and fluid viscosity, play a critical role in gross mechanical properties. To study the effects of portal pressure, liver confinement, fluid viscosity, and tissue crosslinking on liver stiffness, water diffusion, and vessel size, we applied multiparametric magnetic resonance imaging (mpMRI), including multifrequency magnetic resonance elastography (MRE) and apparent diffusion coefficient (ADC) measurements, to ex vivo livers from healthy male rats (13.6±1.6 weeks) at room temperature. Four scenarios including altered liver confinement, tissue crosslinking, and vascular fluid viscosity were investigated with mpMRI at different portal pressure levels (0-17.5 cmH2O). Our experiments demonstrated that, with increasing portal pressure, rat livers showed higher water content, water diffusivity, and increased vessel sizes quantified by the vessel tissue volume fraction (VTVF). These effects were most pronounced in native, unconfined livers (VTVF: 300±120%, p<0.05, ADC: 88±29%, p<0.01), while still significant under confinement (confined: VTVF: 53±32%, p<0.01, ADC: 28±19%, p<0.05; confined-fixed: VTVF: 52±20%, p<0.001, ADC: 11±2%, p<0.01; confined-viscous: VTVF: 210±110%, p<0.01, ADC: 26±9%, p<0.001). Softening with elevated portal pressure (-12±5, p<0.05) occurred regardless of confinement and fixation. However, the liver stiffened when exposed to a more viscous inflow fluid (11±4%, p<0.001). Taken together, our results elucidate the complex relationship between macroscopic-biophysical parameters of liver tissue measured by mpMRI and vascular-fluid properties. Influenced by portal pressure, vascular permeability, and matrix crosslinking, liver stiffness is sensitive to intrinsic poroelastic properties, which, alongside vascular architecture and water diffusivity, may aid in the differential diagnosis of liver disease. STATEMENT OF SIGNIFICANCE: Using highly controllable ex vivo rat liver phantoms, hepatic biophysical properties such as tissue-vascular structure, stiffness, and water diffusivity were investigated using multiparametric MRI including multifrequency magnetic resonance elastography (MRE) and diffusion-weighted imaging (DWI). Through elaborate tuning of the experimental conditions such as the static portal pressure, flow viscosity, amount and distribution of fluid content in the liver, we identified the contributions of the fluid component to the overall imaging-based biophysical properties of the liver. Our finding demonstrated the sensitivity of liver stiffness to the hepatic poroelastic properties, which may aid in the differential diagnosis of liver diseases.
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Affiliation(s)
- Yasmine Safraou
- Department of Radiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Karolina Krehl
- Department of Veterinary Medicine, Institute of Animal Welfare, Animal Behavior and Laboratory Animal Science, Freie Universität Berlin
| | - Tom Meyer
- Department of Radiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Shahryari Mehrgan
- Department of Radiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Jakob Ernst Luis Jordan
- Department of Radiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Heiko Tzschätzsch
- Institute of Medical Informatics, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Thomas Fischer
- Department of Radiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Patrick Asbach
- Department of Radiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Jürgen Braun
- Institute of Medical Informatics, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Ingolf Sack
- Department of Radiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Jing Guo
- Department of Radiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.
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11
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Banerjee P, Gaddam N, Chandler V, Chakraborty S. Oxidative Stress-Induced Liver Damage and Remodeling of the Liver Vasculature. THE AMERICAN JOURNAL OF PATHOLOGY 2023; 193:1400-1414. [PMID: 37355037 DOI: 10.1016/j.ajpath.2023.06.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 05/29/2023] [Accepted: 06/08/2023] [Indexed: 06/26/2023]
Abstract
As an organ critically important for targeting and clearing viruses, bacteria, and other foreign material, the liver operates via immune-tolerant, anti-inflammatory mechanisms indispensable to the immune response. Stress and stress-induced factors disrupt the homeostatic balance in the liver, inflicting tissue damage, injury, and remodeling. These factors include oxidative stress (OS) induced by viral infections, environmental toxins, drugs, alcohol, and diet. A recurrent theme seen among stressors common to multiple liver diseases is the induction of mitochondrial dysfunction, increased reactive oxygen species expression, and depletion of ATP. Inflammatory signaling additionally exacerbates the condition, generating a proinflammatory, immunosuppressive microenvironment and activation of apoptotic and necrotic mechanisms that disrupt the integrity of liver morphology. These pathways initiate signaling pathways that significantly contribute to the development of liver steatosis, inflammation, fibrosis, cirrhosis, and liver cancers. In addition, hypoxia and OS directly enhance angiogenesis and lymphangiogenesis in chronic liver diseases. Late-stage consequences of these conditions often narrow the outcomes for liver transplantation or result in death. This review provides a detailed perspective on various stress-induced factors and the specific focus on role of OS in different liver diseases with special emphasis on different molecular mechanisms. It also highlights how resultant changes in the liver vasculature correlate with pathogenesis.
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Affiliation(s)
- Priyanka Banerjee
- Department of Medical Physiology, Texas A&M Health Science Center, Bryan, Texas.
| | - Niyanshi Gaddam
- Department of Medical Physiology, Texas A&M Health Science Center, Bryan, Texas
| | - Vanessa Chandler
- Department of Medical Physiology, Texas A&M Health Science Center, Bryan, Texas
| | - Sanjukta Chakraborty
- Department of Medical Physiology, Texas A&M Health Science Center, Bryan, Texas.
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12
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Allameh A, Niayesh-Mehr R, Aliarab A, Sebastiani G, Pantopoulos K. Oxidative Stress in Liver Pathophysiology and Disease. Antioxidants (Basel) 2023; 12:1653. [PMID: 37759956 PMCID: PMC10525124 DOI: 10.3390/antiox12091653] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 08/15/2023] [Accepted: 08/20/2023] [Indexed: 09/29/2023] Open
Abstract
The liver is an organ that is particularly exposed to reactive oxygen species (ROS), which not only arise during metabolic functions but also during the biotransformation of xenobiotics. The disruption of redox balance causes oxidative stress, which affects liver function, modulates inflammatory pathways and contributes to disease. Thus, oxidative stress is implicated in acute liver injury and in the pathogenesis of prevalent infectious or metabolic chronic liver diseases such as viral hepatitis B or C, alcoholic fatty liver disease, non-alcoholic fatty liver disease (NAFLD) and non-alcoholic steatohepatitis (NASH). Moreover, oxidative stress plays a crucial role in liver disease progression to liver fibrosis, cirrhosis and hepatocellular carcinoma (HCC). Herein, we provide an overview on the effects of oxidative stress on liver pathophysiology and the mechanisms by which oxidative stress promotes liver disease.
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Affiliation(s)
- Abdolamir Allameh
- Department of Clinical Biochemistry, Faculty of Medical Sciences, Tarbiat Modares University, Tehran 1411713116, Iran; (A.A.); (R.N.-M.); (A.A.)
| | - Reyhaneh Niayesh-Mehr
- Department of Clinical Biochemistry, Faculty of Medical Sciences, Tarbiat Modares University, Tehran 1411713116, Iran; (A.A.); (R.N.-M.); (A.A.)
| | - Azadeh Aliarab
- Department of Clinical Biochemistry, Faculty of Medical Sciences, Tarbiat Modares University, Tehran 1411713116, Iran; (A.A.); (R.N.-M.); (A.A.)
| | - Giada Sebastiani
- Chronic Viral Illness Services, McGill University Health Center, Montreal, QC H4A 3J1, Canada;
- Department of Medicine, McGill University, Montreal, QC H4A 3J1, Canada
| | - Kostas Pantopoulos
- Department of Medicine, McGill University, Montreal, QC H4A 3J1, Canada
- Lady Davis Institute for Medical Research, Montreal, QC H3T 1E2, Canada
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13
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Wu Y, Zhao Y, Islam K, Zhou Y, Omidi S, Berdichevsky Y, Liu Y. Acoustofluidic Engineering Functional Vessel-on-a-Chip. ARXIV 2023:arXiv:2308.06219v2. [PMID: 37608938 PMCID: PMC10441438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Figures] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Construction of in vitro vascular models is of great significance to various biomedical research, such as pharmacokinetics and hemodynamics, thus is an important direction in tissue engineering. In this work, a standing surface acoustic wave field was constructed to spatially arrange suspended endothelial cells into a designated patterning. The cell patterning was maintained after the acoustic field was withdrawn by the solidified hydrogel. Then, interstitial flow was provided to activate vessel tube formation. Thus, a functional vessel-on-a-chip was engineered with specific vessel geometry. Vascular function, including perfusability and vascular barrier function, was characterized by beads loading and dextran diffusion, respectively. A computational atomistic simulation model was proposed to illustrate how solutes cross vascular lipid bilayer. The reported acoustofluidic methodology is capable of facile and reproducible fabrication of functional vessel network with specific geometry. It is promising to facilitate the development of both fundamental research and regenerative therapy.
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Affiliation(s)
- Yue Wu
- Department of Bioengineering, Lehigh University, Bethlehem, Pennsylvania 18015, USA
| | - Yuwen Zhao
- Department of Bioengineering, Lehigh University, Bethlehem, Pennsylvania 18015, USA
| | - Khayrul Islam
- Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, Pennsylvania 18015, USA
| | - Yuyuan Zhou
- Department of Bioengineering, Lehigh University, Bethlehem, Pennsylvania 18015, USA
| | - Saeed Omidi
- Department of Bioengineering, Lehigh University, Bethlehem, Pennsylvania 18015, USA
| | - Yevgeny Berdichevsky
- Department of Bioengineering, Lehigh University, Bethlehem, Pennsylvania 18015, USA
- Department of Electrical and Computer Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, USA
| | - Yaling Liu
- Department of Bioengineering, Lehigh University, Bethlehem, Pennsylvania 18015, USA
- Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, Pennsylvania 18015, USA
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14
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Holman R, Guillemin PC, Lorton O, Desgranges S, Contino-Pépin C, Salomir R. Assessing Enhanced Acoustic Absorption From Sonosensitive Perfluorocarbon Emulsion With Magnetic Resonance-Guided High-Intensity Focused Ultrasound and a Percolated Tissue-Mimicking Flow Phantom. ULTRASOUND IN MEDICINE & BIOLOGY 2023; 49:1510-1517. [PMID: 37117139 DOI: 10.1016/j.ultrasmedbio.2023.01.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 01/18/2023] [Accepted: 01/25/2023] [Indexed: 05/17/2023]
Abstract
OBJECTIVE Sonosensitive high-boiling point perfluorocarbon F8TAC18-PFOB emulsions previously exhibited thermal enhancement during focused ultrasound heating in ex vivo pig livers, kidneys and a laminar flow phantom. The main objectives of this study were to evaluate heating under turbulent conditions, observe perfusion effects, quantify heating in terms of acoustic absorption and model the experimental data. METHODS In this study, similar perfluorocarbon emulsions were circulated at incremental concentrations of 0.07, 0.13, 0.19 and 0.25% v:v through a percolated turbulent flow phantom, more representative of the biological tissue than a laminar flow phantom. The concentrations represent the droplet content in only the perfused fluid, rather than the droplet concentration throughout the entire cross-section. The temperature was measured with magnetic resonance thermometry, during focused ultrasound sonications of 67 W, 95% duty cycle and 33 s duration. These were used in Bioheat equation simulations to investigate in silico the thermal phenomena. The temperature change was compared with the control condition by circulating de-gassed and de-ionized water through the flow phantom without droplets. RESULTS With these 1.24 µm diameter droplets at 0.25% v:v, the acoustic absorption coefficient increased from 0.93 ± 0.05 at 0.0% v:v to 1.82 ± 0.22 m-1 at 0.25% v:v using a 0.1 mL s-1 flow rate. Without perfusion at 0.25% v:v, an increase was observed from 1.23 ± 0.07 m-1 at 0.0% v:v to 1.65 ± 0.17 m-1. CONCLUSION The results further support previously reported thermal enhancement with F8TAC18-PFOB emulsion, quantified the increased absorption at small concentration intervals, illustrated that the effects can be observed in a variety of visceral tissue models and provided a method to simulate untested scenarios.
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Affiliation(s)
- Ryan Holman
- Image Guided Interventions Laboratory, Department of Radiology, University of Geneva, Geneva, Switzerland.
| | - Pauline C Guillemin
- Image Guided Interventions Laboratory, Department of Radiology, University of Geneva, Geneva, Switzerland
| | - Orane Lorton
- Image Guided Interventions Laboratory, Department of Radiology, University of Geneva, Geneva, Switzerland
| | - Stéphane Desgranges
- Equipe Systèmes Amphiphiles bioactifs et Formulations Eco-compatibles, Unité Propre de Recherche et d'Innovation (UPRI), Avignon University, Avignon, France
| | - Christiane Contino-Pépin
- Equipe Systèmes Amphiphiles bioactifs et Formulations Eco-compatibles, Unité Propre de Recherche et d'Innovation (UPRI), Avignon University, Avignon, France
| | - Rares Salomir
- Image Guided Interventions Laboratory, Department of Radiology, University of Geneva, Geneva, Switzerland; Radiology Division, University Hospitals of Geneva, Geneva, Switzerland
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15
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Li JH, Hepworth MR, O'Sullivan TE. Regulation of systemic metabolism by tissue-resident immune cell circuits. Immunity 2023; 56:1168-1186. [PMID: 37315533 PMCID: PMC10321269 DOI: 10.1016/j.immuni.2023.05.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/11/2023] [Accepted: 05/02/2023] [Indexed: 06/16/2023]
Abstract
Recent studies have demonstrated that tissue homeostasis and metabolic function are dependent on distinct tissue-resident immune cells that form functional cell circuits with structural cells. Within these cell circuits, immune cells integrate cues from dietary contents and commensal microbes in addition to endocrine and neuronal signals present in the tissue microenvironment to regulate structural cell metabolism. These tissue-resident immune circuits can become dysregulated during inflammation and dietary overnutrition, contributing to metabolic diseases. Here, we review the evidence describing key cellular networks within and between the liver, gastrointestinal tract, and adipose tissue that control systemic metabolism and how these cell circuits become dysregulated during certain metabolic diseases. We also identify open questions in the field that have the potential to enhance our understanding of metabolic health and disease.
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Affiliation(s)
- Joey H Li
- Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine at UCLA, Los Angeles, CA 900953, USA; Medical Scientist Training Program, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Matthew R Hepworth
- Division of Immunology, Immunity to Infection and Respiratory Medicine, Faculty of Biology, Medicine and Health, Manchester Collaborative Centre for Inflammation Research, Lydia Becker Institute of Immunology and Inflammation, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
| | - Timothy E O'Sullivan
- Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine at UCLA, Los Angeles, CA 900953, USA.
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16
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Qiu Y, Tai Y, Lei J, Zeng Y, Wu H, Li K. Modelling the liver region as porous media to noninvasively measure portal vein pressure gradient (PPG) with numerical methods. J Biomech 2023; 155:111660. [PMID: 37285779 DOI: 10.1016/j.jbiomech.2023.111660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 05/11/2023] [Accepted: 05/23/2023] [Indexed: 06/09/2023]
Abstract
Portal hypertension is the initial and main consequence of liver cirrhosis. Currently the diagnosis relies on invasive and complex operation. This study proposed a new computational method in computational fluid dynamics (CFD) analysis to noninvasively measure the portal pressure gradient (PPG) by considering the liver region as porous media to account for the patient-specific liver resistance. Patient-specific computational models based on the CT scan images and the ultrasound (US) velocity measurement was established. The results show that the PPG derived from CFD analysis is in great agreement with clinical measured data (23.93 mmHg vs 23 mmHg). Validation of the numerical method and was performed by post-TIPS PPG measurement (10.69 mmHg vs 11 mmHg). Then the range of porous media parameters is investigated in a validation group of three patients. The computational method proposed in this study is promising in more accurately measuring the PPG noninvasively.
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Affiliation(s)
- Yue Qiu
- Department of Gastroenterology and Hepatology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China; West China Biomedical Big Data Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China; Med-X Center for Informatics, Sichuan University, Chengdu, Sichuan 610041, PR China; West China Hospital-SenseTime Joint Lab, Chengdu, Sichuan 610041, PR China
| | - Yang Tai
- Department of Gastroenterology and Hepatology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Jianguo Lei
- Med-X Center for Informatics, Sichuan University, Chengdu, Sichuan 610041, PR China; West China Hospital-SenseTime Joint Lab, Chengdu, Sichuan 610041, PR China
| | - Yi Zeng
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China
| | - Hao Wu
- Department of Gastroenterology and Hepatology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China.
| | - Kang Li
- West China Biomedical Big Data Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China; Med-X Center for Informatics, Sichuan University, Chengdu, Sichuan 610041, PR China; West China Hospital-SenseTime Joint Lab, Chengdu, Sichuan 610041, PR China.
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17
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Rojas AMT, Lorente S. 1D-model of the human liver circulatory system. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2023; 238:107612. [PMID: 37224726 DOI: 10.1016/j.cmpb.2023.107612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 04/27/2023] [Accepted: 05/15/2023] [Indexed: 05/26/2023]
Abstract
BACKGROUND AND OBJECTIVE Blood flow rate and pressure can be measured in vivo by invasive and non-invasive techniques in the large vessels of the hepatic vasculature, but it is not possible to do so along the entire liver circulatory system. Here, we develop a novel 1D model of the liver circulatory system to obtain the hemodynamic signals from macrocirculation to microcirculation with a very low computational cost. METHODS The model considers structurally well-defined elements that constitute the entire hepatic circulatory system, the hemodynamics (the temporal-dependence of the blood flow rate and pressure), and the elasticity of the vessel walls. RESULTS Using flow rate signals from in vivo measurements as inputs in the model, we obtain pressure signals within their physiological range of values. Furthermore, the model allows to get and analyze the blood flow rate and pressure signals along any vessel of the hepatic vasculature. The impact of the elasticity of the different model components on the inlet pressures is also tested. CONCLUSIONS A 1D model of the entire blood vascular system of the human liver is presented for the first time. The model allows to obtain the hemodynamic signals along the hepatic vasculature at a low computational cost. The amplitude and shape of the flow and pressure signals has hardly been studied in the small liver vessels. In this sense, the proposed model is a useful non-invasive exploration tool of the characteristics of the hemodynamic signals. In contrast to models that partially address the hepatic vasculature or those using an electrical analogy, the model presented here is made entirely of structurally well-defined elements. Future works will allow to directly emulate structural vascular alterations due to hepatic diseases and studying their impact on pressure and blood flow signals at key locations of the vasculature.
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Affiliation(s)
- Aimee M Torres Rojas
- Mechanical Engineering Department, Villanova University, 800 Lancaster Avenue, Villanova, PA 19085, USA
| | - Sylvie Lorente
- Mechanical Engineering Department, Villanova University, 800 Lancaster Avenue, Villanova, PA 19085, USA.
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18
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Lopez-Scarim J, Nambiar SM, Billerbeck E. Studying T Cell Responses to Hepatotropic Viruses in the Liver Microenvironment. Vaccines (Basel) 2023; 11:681. [PMID: 36992265 PMCID: PMC10056334 DOI: 10.3390/vaccines11030681] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/08/2023] [Accepted: 03/10/2023] [Indexed: 03/19/2023] Open
Abstract
T cells play an important role in the clearance of hepatotropic viruses but may also cause liver injury and contribute to disease progression in chronic hepatitis B and C virus infections which affect millions of people worldwide. The liver provides a unique microenvironment of immunological tolerance and hepatic immune regulation can modulate the functional properties of T cell subsets and influence the outcome of a virus infection. Extensive research over the last years has advanced our understanding of hepatic conventional CD4+ and CD8+ T cells and unconventional T cell subsets and their functions in the liver environment during acute and chronic viral infections. The recent development of new small animal models and technological advances should further increase our knowledge of hepatic immunological mechanisms. Here we provide an overview of the existing models to study hepatic T cells and review the current knowledge about the distinct roles of heterogeneous T cell populations during acute and chronic viral hepatitis.
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Affiliation(s)
| | | | - Eva Billerbeck
- Division of Hepatology, Department of Medicine and Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
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19
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Ho H, Means S, Safaei S, Hunter PJ. In silico modeling for the hepatic circulation and transport: From the liver organ to lobules. WIREs Mech Dis 2023; 15:e1586. [PMID: 36131627 DOI: 10.1002/wsbm.1586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 08/08/2022] [Accepted: 08/15/2022] [Indexed: 11/12/2022]
Abstract
The function of the liver depends critically on its blood supply. Numerous in silico models have been developed to study various aspects of the hepatic circulation, including not only the macro-hemodynamics at the organ level, but also the microcirculation at the lobular level. In addition, computational models of blood flow and bile flow have been used to study the transport, metabolism, and clearance of drugs in pharmacokinetic studies. These in silico models aim to provide insights into the liver organ function under both healthy and diseased states, and to assist quantitative analysis for surgical planning and postsurgery treatment. The purpose of this review is to provide an update on state-of-the-art in silico models of the hepatic circulation and transport processes. We introduce the numerical methods and the physiological background of these models. We also discuss multiscale frameworks that have been proposed for the liver, and their linkage with the large context of systems biology, systems pharmacology, and the Physiome project. This article is categorized under: Metabolic Diseases > Computational Models Metabolic Diseases > Biomedical Engineering Cardiovascular Diseases > Computational Models.
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Affiliation(s)
- Harvey Ho
- Auckland Bioengineering Institute, The University of Auckland, Auckland, New Zealand
| | - Shawn Means
- Auckland Bioengineering Institute, The University of Auckland, Auckland, New Zealand
| | - Soroush Safaei
- Auckland Bioengineering Institute, The University of Auckland, Auckland, New Zealand
| | - Peter John Hunter
- Auckland Bioengineering Institute, The University of Auckland, Auckland, New Zealand
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20
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El-Elimat T, Al-Tal BK, Al-Sawalha NA, Alsaggar M, Nusair SD, Al‐Qiam R, Al Sharie AH, El Hajji F, Hamadneh L. Sumc (Rhus coriaria L.) fruit ameliorates paracetamol-induced hepatotoxicity. FOOD BIOSCI 2023. [DOI: 10.1016/j.fbio.2023.102488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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21
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Huang H, Xu R, Ni P, Zhang Z, Sun C, He H, Wang X, Zhang L, Liang Z, Liu H. Water-driven noninvasively detachable wet tissue adhesives for wound closure. Mater Today Bio 2022; 16:100369. [PMID: 35937571 PMCID: PMC9352973 DOI: 10.1016/j.mtbio.2022.100369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 07/02/2022] [Accepted: 07/13/2022] [Indexed: 01/31/2023] Open
Abstract
Tissue adhesive with on-demand detachment feature is critically important since it can minimize hurt to patient when it is stripped away. Herein, a water-driven noninvasively detachable wet tissue adhesive hydrogel (w-TAgel) was produced by UV-initiated radical copolymerization of N-isopropylacrylamide (NIPAM), acrylamide (AAm), gelatin methacrylate (GelMA), and urushiol. As a w-TAgel, its robust and tough mechanical property makes it suitable for dynamic wound tissue. The polyurushiol segments of it are crucial to the formation of tough adhesion interface with various wet tissues, while polyNIPAM units play an indispensable role in on-demand detachment via thermo-responsive swelling behavior because the hydrophobic aggregation among isopropyl groups is destroyed upon water treatment with temperature of 25 °C or less. Additionally, it exhibits multiple merits including good hemocompatibility, cytocompatibility as well as pro-coagulant activity and hemostasis. Therefore, our w-TAgel with strong adhesion and facile detachment is an advanced prospective dressing for wound closure and rapid hemostasis. The wet tissue adhesion and water-driven detachable mechanism may shed new light on the development of on-demand noninvasively detachable wet tissue adhesives.
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Affiliation(s)
- Hongjian Huang
- Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fujian, 350007, China
| | - Renfeng Xu
- College of Life Science, Fujian Normal University, Fujian, 350007, China
| | - Peng Ni
- Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fujian, 350007, China
| | - Zhenghong Zhang
- College of Life Science, Fujian Normal University, Fujian, 350007, China
- Corresponding author.
| | - Caixia Sun
- Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fujian, 350007, China
| | - Huaying He
- Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fujian, 350007, China
| | - Xinyue Wang
- Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fujian, 350007, China
| | - Lidan Zhang
- Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fujian, 350007, China
| | - Ziyi Liang
- Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fujian, 350007, China
| | - Haiqing Liu
- Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fujian, 350007, China
- Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian, 350007, China
- Corresponding author. Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fujian, 350007, China.
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22
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Delgado-Coello B, Navarro-Alvarez N, Mas-Oliva J. The Influence of Interdisciplinary Work towards Advancing Knowledge on Human Liver Physiology. Cells 2022; 11:cells11223696. [PMID: 36429123 PMCID: PMC9688355 DOI: 10.3390/cells11223696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 11/11/2022] [Accepted: 11/13/2022] [Indexed: 11/23/2022] Open
Abstract
The knowledge accumulated throughout the years about liver regeneration has allowed a better understanding of normal liver physiology, by reconstructing the sequence of steps that this organ follows when it must rebuild itself after being injured. The scientific community has used several interdisciplinary approaches searching to improve liver regeneration and, therefore, human health. Here, we provide a brief history of the milestones that have advanced liver surgery, and review some of the new insights offered by the interdisciplinary work using animals, in vitro models, tissue engineering, or mathematical models to help advance the knowledge on liver regeneration. We also present several of the main approaches currently available aiming at providing liver support and overcoming organ shortage and we conclude with some of the challenges found in clinical practice and the ethical issues that have concomitantly emerged with the use of those approaches.
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Affiliation(s)
- Blanca Delgado-Coello
- Department of Structural Biology and Biochemistry, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
- Correspondence:
| | - Nalu Navarro-Alvarez
- Department of Gastroenterology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City 14080, Mexico
- Departament of Molecular Biology, Universidad Panamericana School of Medicine, Mexico City 03920, Mexico
- Department of Surgery, University of Colorado Anschutz Medical Campus, Denver, CO 80045, USA
| | - Jaime Mas-Oliva
- Department of Structural Biology and Biochemistry, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
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23
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Im GB, Lin RZ. Bioengineering for vascularization: Trends and directions of photocrosslinkable gelatin methacrylate hydrogels. Front Bioeng Biotechnol 2022; 10:1053491. [PMID: 36466323 PMCID: PMC9713639 DOI: 10.3389/fbioe.2022.1053491] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 11/03/2022] [Indexed: 10/17/2023] Open
Abstract
Gelatin methacrylate (GelMA) hydrogels have been widely used in various biomedical applications, especially in tissue engineering and regenerative medicine, for their excellent biocompatibility and biodegradability. GelMA crosslinks to form a hydrogel when exposed to light irradiation in the presence of photoinitiators. The mechanical characteristics of GelMA hydrogels are highly tunable by changing the crosslinking conditions, including the GelMA polymer concentration, degree of methacrylation, light wavelength and intensity, and light exposure time et al. In this regard, GelMA hydrogels can be adjusted to closely resemble the native extracellular matrix (ECM) properties for the specific functions of target tissues. Therefore, this review focuses on the applications of GelMA hydrogels for bioengineering human vascular networks in vitro and in vivo. Since most tissues require vasculature to provide nutrients and oxygen to individual cells, timely vascularization is critical to the success of tissue- and cell-based therapies. Recent research has demonstrated the robust formation of human vascular networks by embedding human vascular endothelial cells and perivascular mesenchymal cells in GelMA hydrogels. Vascular cell-laden GelMA hydrogels can be microfabricated using different methodologies and integrated with microfluidic devices to generate a vasculature-on-a-chip system for disease modeling or drug screening. Bioengineered vascular networks can also serve as build-in vasculature to ensure the adequate oxygenation of thick tissue-engineered constructs. Meanwhile, several reports used GelMA hydrogels as implantable materials to deliver therapeutic cells aiming to rebuild the vasculature in ischemic wounds for repairing tissue injuries. Here, we intend to reveal present work trends and provide new insights into the development of clinically relevant applications based on vascularized GelMA hydrogels.
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Affiliation(s)
- Gwang-Bum Im
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA, United States
- Department of Surgery, Harvard Medical School, Boston, MA, United States
| | - Ruei-Zeng Lin
- Department of Cardiac Surgery, Boston Children’s Hospital, Boston, MA, United States
- Department of Surgery, Harvard Medical School, Boston, MA, United States
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24
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Survarachakan S, Prasad PJR, Naseem R, Pérez de Frutos J, Kumar RP, Langø T, Alaya Cheikh F, Elle OJ, Lindseth F. Deep learning for image-based liver analysis — A comprehensive review focusing on malignant lesions. Artif Intell Med 2022; 130:102331. [DOI: 10.1016/j.artmed.2022.102331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 05/23/2022] [Accepted: 05/30/2022] [Indexed: 11/26/2022]
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25
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Constructal Optimizations of Line-to-Line Vascular Channels with Turbulent Convection Heat Transfer. ENTROPY 2022; 24:e24070999. [PMID: 35885222 PMCID: PMC9322715 DOI: 10.3390/e24070999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 07/05/2022] [Accepted: 07/15/2022] [Indexed: 11/16/2022]
Abstract
The multi-scale line-to-line vascular channels (LVCs) widely exist in nature because of their excellent transmission characteristics. In this paper, models of LVCs with turbulent convection heat transfer are established. Based on constructal theory and the entropy generation minimization principle, the constructal optimizations of LVCs with any order are conducted by taking the angles at bifurcations as the optimization variables. The heat flux on the channel wall per unit length is fixed and uniform. The areas occupied by vasculature and the total volumes of channels are fixed. The analytical expressions of the optimal angles, dimensionless total entropy generation rate and entropy generation number (EGN) of LVCs with any order versus dimensionless mass flow rate are obtained, respectively. The results indicate that the dimensionless total entropy generation rate of LVCs with any order can be significantly decreased by optimizing the angles of LVCs, which is significantly more when the order of LVCs is higher. As the dimensionless mass flow rate increases, the optimal angles of LVCs with any order remain unchanged first, then the optimal angles at the entrance (root) increase, and the other optimal angles decrease continuously and finally tend to the respective stable values. The optimal angles of LVCs continue to increase from the entrance to the outlet (crown), i.e., the LVCs with a certain order gradually spread out from the root to the crown. The dimensionless total entropy generation rate and EGN of LVCs first decrease and then increase with the growth of the dimensionless mass flow rate. There is optimal dimensionless mass flow rate, making the dimensionless total entropy generation rate and the EGN reach their respective minimums. The results obtained herein can provide some new theoretical guidelines of thermal design and management for the practical applications of LVCs.
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26
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Liu Z, Zhang G, Chen J, Tong J, Wang H, Chen J, Yang D, Hu J. G-CSF promotes the viability and angiogenesis of injured liver via direct effects on the liver cells. Mol Biol Rep 2022; 49:8715-8725. [PMID: 35781603 PMCID: PMC9463201 DOI: 10.1007/s11033-022-07715-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 06/15/2022] [Indexed: 11/25/2022]
Abstract
Background Presently, liver transplantation is the only treatment strategy for liver failure (LF). Although granulocyte-colony stimulating factor (G-CSF) exhibits protective functions in LF, it is not clear whether it directly affects the liver cells. Methods and Results We established an injured liver cell model and observed that G-CSF treatment promoted cell viability and enhanced Ki67 and VEGF-A expression. Thereafter, human umbilical vein endothelial cells (HUVECs) were cultured in a conditioned medium collected from the G-CSF-treated injured liver cells. HUVECs’ proliferation and tubule formation were promoted. Furthermore, in an injured liver mouse model, confirmed via haematoxylin–eosin staining, we evaluated serum alanine aminotransferase activity, Ki67 expression, and microvessel density (MVD). G-CSF treatment significantly relieved liver injury, upregulated Ki67 expression, and enhanced MVD in the injured mouse liver tissue. Additionally, AKT and ERK signal targets were explored, and it was demonstrated that the effects of G-CSF on injured liver cells were mediated through the AKT and ERK signalling pathways. Conclusions G-CSF promotes injured liver viability and angiogenesis by directly affecting injured liver cells via the AKT and ERK signalling pathways. These findings improve our understanding of the role of G-CSF in recovery from LF. Supplementary Information The online version contains supplementary material available at 10.1007/s11033-022-07715-4.
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Affiliation(s)
- Zifeng Liu
- Medical School of Chinese PLA, Beijing, China.,Senior Department of Hepatology, The Fifth Medical Center of PLA General Hospital, Beijing, China
| | - Guiling Zhang
- Department of Pathology, Chengwu People's Hospital, Heze, China
| | - Jing Chen
- Medical School of Chinese PLA, Beijing, China.,Senior Department of Hepatology, The Fifth Medical Center of PLA General Hospital, Beijing, China
| | - Jingjing Tong
- Medical School of Chinese PLA, Beijing, China.,Department of Infectious Diseases, Beijing Jishuitan, Beijing, China
| | - Hongmin Wang
- Senior Department of Hepatology, The Fifth Medical Center of PLA General Hospital, Beijing, China.,Peking University 302 Clinical Medical School, Beijing, China
| | - Jing Chen
- Medical School of Chinese PLA, Beijing, China
| | - Dong Yang
- Oncology Department, Affiliated Hospital of Jining Medical University, Jining, China
| | - Jinhua Hu
- Medical School of Chinese PLA, Beijing, China. .,Senior Department of Hepatology, The Fifth Medical Center of PLA General Hospital, Beijing, China. .,Peking University 302 Clinical Medical School, Beijing, China.
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27
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Liver Acinus Dynamic Chip for Assessment of Drug-Induced Zonal Hepatotoxicity. BIOSENSORS 2022; 12:bios12070445. [PMID: 35884248 PMCID: PMC9312795 DOI: 10.3390/bios12070445] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/10/2022] [Accepted: 06/22/2022] [Indexed: 11/24/2022]
Abstract
Zonation along the liver acinus is considered a key feature of liver physiology. Here, we developed a liver acinus dynamic (LADY) chip that recapitulates a key functional structure of the liver acinus and hepatic zonation. Corresponding to the blood flow from portal triads to the central vein in vivo, gradual flow of oxygen and glucose–carrying culture medium into the HepG2 cell chamber of the LADY chip generated zonal protein expression patterns in periportal (PP) zone 1 and perivenous (PV) zone 3. Higher levels of albumin secretion and urea production were obtained in a HepG2/HUVECs co-culture LADY chip than in HepG2 mono-culture one. Zonal expression of PEPCK as a PP marker and CYP2E1 as a PV marker was successfully generated. Cell death rate of the PV cells was higher than that of the PP cells since zonal factors responsible for metabolic activation of acetaminophen (APAP) were highly expressed in the PV region. We also found the co-culture enhanced metabolic capacity to process APAP, thus improving resistance to APAP toxicity, in comparison with HepG2 mono-culture. These results indicate that our LADY chip successfully represents liver zonation and could be useful in drug development studies as a drug-induced zonal hepatotoxicity testing platform.
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28
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Torres Rojas AM, Lorente S, Hautefeuille M, Sanchez-Cedillo A. Hierarchical Modeling of the Liver Vascular System. Front Physiol 2021; 12:733165. [PMID: 34867439 PMCID: PMC8637164 DOI: 10.3389/fphys.2021.733165] [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: 06/29/2021] [Accepted: 10/13/2021] [Indexed: 02/05/2023] Open
Abstract
The liver plays a key role in the metabolic homeostasis of the whole organism. To carry out its functions, it is endowed with a peculiar circulatory system, made of three main dendritic flow structures and lobules. Understanding the vascular anatomy of the liver is clinically relevant since various liver pathologies are related to vascular disorders. Here, we develop a novel liver circulation model with a deterministic architecture based on the constructal law of design over the entire scale range (from macrocirculation to microcirculation). In this framework, the liver vascular structure is a combination of superimposed tree-shaped networks and porous system, where the main geometrical features of the dendritic fluid networks and the permeability of the porous medium, are defined from the constructal viewpoint. With this model, we are able to emulate physiological scenarios and to predict changes in blood pressure and flow rates throughout the hepatic vasculature due to resection or thrombosis in certain portions of the organ, simulated as deliberate blockages in the blood supply to these sections. This work sheds light on the critical impact of the vascular network on mechanics-related processes occurring in hepatic diseases, healing and regeneration that involve blood flow redistribution and are at the core of liver resilience.
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Affiliation(s)
- Aimee M Torres Rojas
- Department of Mechanical Engineering, Villanova University, Villanova, PA, United States
| | - Sylvie Lorente
- Department of Mechanical Engineering, Villanova University, Villanova, PA, United States
| | - Mathieu Hautefeuille
- Departamento de Física, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Aczel Sanchez-Cedillo
- Laboratorio de Trasplantes, Centro Médico Nacional 20 de Noviembre, Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado (ISSSTE), Ciudad de México, Mexico
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29
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Rohan E, Camprová Turjanicová J, Liška V. Geometrical model of lobular structure and its importance for the liver perfusion analysis. PLoS One 2021; 16:e0260068. [PMID: 34855778 PMCID: PMC8638901 DOI: 10.1371/journal.pone.0260068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 11/02/2021] [Indexed: 11/18/2022] Open
Abstract
A convenient geometrical description of the microvascular network is necessary for computationally efficient mathematical modelling of liver perfusion, metabolic and other physiological processes. The tissue models currently used are based on the generally accepted schematic structure of the parenchyma at the lobular level, assuming its perfect regular structure and geometrical symmetries. Hepatic lobule, portal lobule, or liver acinus are considered usually as autonomous functional units on which particular physiological problems are studied. We propose a new periodic unit-the liver representative periodic cell (LRPC) and establish its geometrical parametrization. The LRPC is constituted by two portal lobulae, such that it contains the liver acinus as a substructure. As a remarkable advantage over the classical phenomenological modelling approaches, the LRPC enables for multiscale modelling based on the periodic homogenization method. Derived macroscopic equations involve so called effective medium parameters, such as the tissue permeability, which reflect the LRPC geometry. In this way, mutual influences between the macroscopic phenomena, such as inhomogeneous perfusion, and the local processes relevant to the lobular (mesoscopic) level are respected. The LRPC based model is intended for its use within a complete hierarchical model of the whole liver. Using the Double-permeability Darcy model obtained by the homogenization, we illustrate the usefulness of the LRPC based modelling to describe the blood perfusion in the parenchyma.
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Affiliation(s)
- Eduard Rohan
- Department of Mechanics, Faculty of Applied Sciences, NTIS – New Technologies for Information Society, University of West Bohemia, Pilsen, Czech Republic
- * E-mail:
| | - Jana Camprová Turjanicová
- Department of Mechanics, Faculty of Applied Sciences, NTIS – New Technologies for Information Society, University of West Bohemia, Pilsen, Czech Republic
| | - Václav Liška
- Biomedical Center, Faculty of Medicine, Charles University Pilsen, Pilsen, Czech Republic
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30
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Lee SY, Kim D, Lee SH, Sung JH. Microtechnology-based in vitro models: Mimicking liver function and pathophysiology. APL Bioeng 2021; 5:041505. [PMID: 34703969 PMCID: PMC8520487 DOI: 10.1063/5.0061896] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 09/21/2021] [Indexed: 02/06/2023] Open
Abstract
The liver plays important roles in drug metabolism and homeostasis. The metabolism and biotransformation can not only affect the efficacy of drugs but also result in hepatotoxicity and drug-induced liver injury. Understanding the complex physiology of the liver and the pathogenetic mechanisms of liver diseases is essential for drug development. Conventional in vitro models have limitations in the ability to predict drug effects, due to the lack of physiological relevance. Recently, the liver-on-a-chip platform has been developed to reproduce the microarchitecture and in vivo environment of the liver. These efforts have improved the physiological relevance of the liver tissue used in the platform and have demonstrated its applicability to drug screening and disease models. In this review, we summarize the recent development of liver-on-a-chip models that closely mimic the in vivo liver environments and liver diseases.
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Affiliation(s)
- Seung Yeon Lee
- Department of Chemical Engineering, Hongik University, Seoul 04066, South Korea
| | - Donghyun Kim
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, South Korea
| | - Seung Hwan Lee
- Department of Bionano Engineering, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 15588, South Korea
| | - Jong Hwan Sung
- Department of Chemical Engineering, Hongik University, Seoul 04066, South Korea
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31
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Ramadan Q, Fardous RS, Hazaymeh R, Alshmmari S, Zourob M. Pharmacokinetics-On-a-Chip: In Vitro Microphysiological Models for Emulating of Drugs ADME. Adv Biol (Weinh) 2021; 5:e2100775. [PMID: 34323392 DOI: 10.1002/adbi.202100775] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 06/08/2021] [Indexed: 12/15/2022]
Abstract
Despite many ongoing efforts across the full spectrum of pharmaceutical and biotech industries, drug development is still a costly undertaking that involves a high risk of failure during clinical trials. Animal models played vital roles in understanding the mechanism of human diseases. However, the use of these models has been a subject of heated debate, particularly due to ethical matters and the inevitable pathophysiological differences between animals and humans. Current in vitro models lack the sufficient functionality and predictivity of human pharmacokinetics and toxicity, therefore, are not capable to fully replace animal models. The recent development of micro-physiological systems has shown great potential as indispensable tools for recapitulating key physiological parameters of humans and providing in vitro methods for predicting the pharmacokinetics and pharmacodynamics in humans. Integration of Absorption, Distribution, Metabolism, and Excretion (ADME) processes within one close in vitro system is a paramount development that would meet important unmet pharmaceutical industry needs. In this review paper, synthesis of the ADME-centered organ-on-a-chip technology is systemically presented from what is achieved to what needs to be done, emphasizing the requirements of in vitro models that meet industrial needs in terms of the structure and functions.
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Affiliation(s)
- Qasem Ramadan
- Alfaisal University, Riyadh, 11533, Kingdom of Saudi Arabia
| | - Roa Saleem Fardous
- Alfaisal University, Riyadh, 11533, Kingdom of Saudi Arabia.,Strathclyde Institute of Pharmacy and Biomedical Sciences, Strathclyde University, Glasgow, G4 0RE, United Kingdom
| | - Rana Hazaymeh
- Almaarefa University, Riyadh, 13713, Kingdom of Saudi Arabia
| | - Sultan Alshmmari
- Saudi Food and Drug Authority, Riyadh, 13513-7148, Kingdom of Saudi Arabia
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32
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Cell and extracellular matrix growth theory and its implications for tumorigenesis. Biosystems 2021; 201:104331. [PMID: 33358828 DOI: 10.1016/j.biosystems.2020.104331] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/16/2020] [Accepted: 12/16/2020] [Indexed: 12/25/2022]
Abstract
Cells associated with an abnormal (cancerous) growth exchange flows, morph freely and grow hand-in-glove with their immediate environment, the extracellular matrix (ECM). The cell structure experiences two mass flows in counterflow. Flowing into the structure are nutrients and flowing out is refuse from the metabolically active biomass within. The physical effect of the evolution of the cell and extracellular structure is more flow and mixing in that space, that is, more mixing than in the absence of a biological growth in that space. The objective of the present theory is to predict the increase in the size of the cell cluster as a function of its structure, and also to predict the critical cluster sizes that mark the transitions from one distinct cluster configuration to the next. This amounts to predicting the timing and the main features of the transitions from single cell to clusters with two, four, eight and more cells, including larger clusters with cells organized on its outer surface. The predicted evolution of the size and configuration of the cell cluster is validated successfully by comparison with measurements from several independent studies of cancerous and non-cancerous growth patterns.
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