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liver decellularization

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https://www.readbyqxmd.com/read/27862079/discarded-livers-find-a-new-life-engineered-liver-grafts-using-hepatocytes-recovered-from-marginal-livers
#1
Basak E Uygun, Maria-Louisa Izamis, Maria Jaramillo, Yibin Chen, Gavrielle Price, Sinan Ozer, Martin L Yarmush
Treatment for end-stage liver failure is restricted by the critical shortage of donor organs; about 4000 people die in the USA while waiting for a transplantable organ. This situation has been a major driving force behind the rise of tissue engineering to build artificial tissues/organs. Recent advancements in creating transplantable liver grafts using decellularized liver scaffolds bring the field closer to clinical translation. However, a source of readily available and highly functional adult hepatocytes in adequate numbers for regenerative liver therapies still remains unclear...
November 8, 2016: Artificial Organs
https://www.readbyqxmd.com/read/27811394/sympathetic-neurotransmitters-promote-the-process-of-recellularization-in-decellularized-liver-matrix-via-activating-the-il-6-stat3-pathway
#2
Xudong Wen, Hongbo Huan, Xiaojun Wang, Xuejiao Chen, Lili Wu, Yujun Zhang, Weihui Liu, Ping Bie, Feng Xia
Recellularized liver, as an approach for hepatic tissue engineering, is an effective alternative to orthotopic liver transplantation for end-stage hepatic failure. When compared with normal liver, recellularized liver has a disparity in hepatocyte viability and function, owing to the difficulty of fully simulating the microenvironment of liver. Although the sympathetic nervous system (SNS) is considered an important constituent of liver function, few studies have examined the effect of the SNS on hepatic tissue engineering...
November 4, 2016: Biomedical Materials
https://www.readbyqxmd.com/read/27805597/study-of-viral-vectors-in-a-three-dimensional-liver-model-repopulated-with-the-human-hepatocellular-carcinoma-cell-line-hepg2
#3
Thomas Hiller, Viola Röhrs, Eva-Maria Dehne, Anke Wagner, Henry Fechner, Roland Lauster, Jens Kurreck
This protocol describes the generation of a three-dimensional (3D) ex vivo liver model and its application to the study and development of viral vector systems. The model is obtained by repopulating the extracellular matrix of a decellularized rat liver with a human hepatocyte cell line. The model permits studies in a vascularized 3D cell system, replacing potentially harmful experiments with living animals. Another advantage is the humanized nature of the model, which is closer to human physiology than animal models...
October 24, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27741254/fibronectin-extra-domain-a-promotes-liver-sinusoid-repair-following-hepatectomy
#4
Bridget Sackey-Aboagye, Abby L Olsen, Sarmistha M Mukherjee, Alexander Ventriglia, Yasuyuki Yokosaki, Linda E Greenbaum, Gi Yun Lee, Hani Naga, Rebecca G Wells
Liver sinusoidal endothelial cells (LSECs) are the main endothelial cells in the liver and are important for maintaining liver homeostasis as well as responding to injury. LSECs express cellular fibronectin containing the alternatively spliced extra domain A (EIIIA-cFN) and increase expression of this isoform after liver injury, although its function is not well understood. Here, we examined the role of EIIIA-cFN in liver regeneration following partial hepatectomy. We carried out two-thirds partial hepatectomies in mice lacking EIIIA-cFN and in their wild type littermates, studied liver endothelial cell adhesion on decellularized, EIIIA-cFN-containing matrices and investigated the role of cellular fibronectins in liver endothelial cell tubulogenesis...
2016: PloS One
https://www.readbyqxmd.com/read/27720934/in-vivo-organ-engineering-perfusion-of-hepatocytes-in-a-single-liver-lobe-scaffold-of-living-rats
#5
Jun Pan, Sheng Yan, Jun-Jie Gao, Ying-Ying Wang, Zhong-Jie Lu, Chen-Wei Cui, Yao-Hui Zhang, Yan Wang, Xue-Qin Meng, Lin Zhou, Hai-Yang Xie, Jessica Zheng, Ming H Zheng, Shu-Sen Zheng
Organ decellularization is emerging as a promising regenerative medicine approach as it is able to provide an acellular, three-dimensional biological scaffold material that can be seeded with living cells for organ reengineering. However this application is currently limited to donor-derived decellularized organs for reengineering in vitro and no study has been conducted for re-engineering the decellularized organ in vivo. We developed a novel technique of a single liver lobe decellularization in vivo in live animals...
October 5, 2016: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/27638002/functional-liver-tissue-engineering-by-an-adult-mouse-liver-derived-neuro-glia-antigen-2-expressing-stem-progenitor-population
#6
Hongyu Zhang, Christopher T Siegel, Jing Li, Jiejuan Lai, Ling Shuai, Xiangdong Lai, Yujun Zhang, Yan Jiang, Ping Bie, Lianhua Bai
Deaths due to end-stage liver diseases (ESLD) are increasingly registered annually in the world. Liver transplantation is the ultimate treatment for ESLD to date, which has been hampered by a critical shortage of organs. The potential of decellularized liver scaffolds (DLS) derived from solid organs as a three dimensional (3D) platform has been evolved as a promising approach in liver tissue engineering for translating functional liver organ replacements, but questions still exist regarding the optimal cell population for seeding in DLS and the preparation of the DLS themselves...
September 17, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27614158/an-injectable-acellular-matrix-scaffold-with-absorbable-permeable-nanoparticles-improves-the-therapeutic-effects-of-docetaxel-on-glioblastoma
#7
He-Lin Xu, Kai-Li Mao, Cui-Tao Lu, Zi-Liang Fan, Jing-Jing Yang, Jie Xu, Pian-Pian Chen, De-Li ZhuGe, Bi-Xin Shen, Bing-Hui Jin, Jian Xiao, Ying-Zheng Zhao
Intratumoral drug delivery (IT) is an inherently appealing approach for concentrating toxic chemotherapies at the site of action. However, for most chemotherapies, poor tumor penetration and short retention at the administration site limit their anti-tumor effects. In this work, we describe permeable nanoparticles (NPs) prepared with a novel amphiphilic polymer, RRR-α-tocopheryl succinate-grafted-ε-polylysine conjugate (VES-g-ε-PLL). The nanoparticles (NPs) of VES-g-ε-PLL exhibited an ultra-small hydrodynamic diameter (20...
November 2016: Biomaterials
https://www.readbyqxmd.com/read/27601305/solubilized-extracellular-matrix-bioscaffolds-derived-from-diverse-source-tissues-differentially-influence-macrophage-phenotype
#8
Jenna L Dziki, Derek S Wang, Catalina Pineda, Brian M Sicari, Theresa Rausch, Stephen F Badylak
The host response to biomaterials is a critical determinant of their success or failure in tissue-repair applications. Macrophages are among the first responders in the host response to biomaterials and have been shown to be predictors of downstream tissue remodeling events. Biomaterials composed of mammalian extracellular matrix (ECM) in particular have been shown to promote distinctive and constructive remodeling outcomes when compared to their synthetic counterparts, a property that has been largely attributed to their ability to modulate the host macrophage response...
January 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/27593734/methods-for-implant-acceptance-and-wound-healing-material-selection-and-implant-location-modulate-macrophage-and-fibroblast-phenotypes
#9
Anuraag Boddupalli, Lida Zhu, Kaitlin M Bratlie
This review focuses on materials and methods used to induce phenotypic changes in macrophages and fibroblasts. Herein, we give a brief overview on how changes in macrophages and fibroblasts phenotypes are critical biomarkers for identification of implant acceptance, wound healing effectiveness, and are also essential for evaluating the regenerative capabilities of some hybrid strategies that involve the combination of natural and synthetic materials. The different types of cells present during the host response have been extensively studied for evaluating the reaction to different materials and there are varied material approaches towards fabrication of biocompatible substrates...
September 5, 2016: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/27459202/bioengineered-livers-a-new-tool-for-drug-testing-and-a-promising-solution-to-meet-the-growing-demand-for-donor-organs
#10
Franziska Mußbach, Utz Settmacher, Olaf Dirsch, Chichi Xie, Uta Dahmen
BACKGROUND: Organ engineering is a new innovative strategy to cope with two problems: the need for physiological models for pharmacological research and donor organs for transplantation. A functional scaffold is generated from explanted organs by removing all cells (decellularization) by perfusing the organ with ionic or nonionic detergents via the vascular system. Subsequently the acellular scaffold is reseeded with organ-specific cells (repopulation) to generate a functional organ. SUMMARY: This review gives an overview of the state of the art describing the decellularization process, the subsequent quality assessment, the repopulation techniques and the functional assessment...
July 27, 2016: European Surgical Research. Europäische Chirurgische Forschung. Recherches Chirurgicales Européennes
https://www.readbyqxmd.com/read/27459086/the-effect-of-heparinized-decellularized-scaffolds-on-angiogenic-capability
#11
Qiong Wu, Yi Li, Yujia Wang, Li Li, Xin Jiang, Jing Tang, Hao Yang, Jie Zhang, Ji Bao, Hong Bu
The immobilization of heparin, a new and versatile approach to the surface modification of decellularized tissues, has the potential to greatly improve the hemocompatibility of engineered tissue constructs derived from decellularized organs. We report on porcine decellularized liver scaffolds (DLSs) heparinized by the end-point attachment (EPA) technique. The heparinized DLSs (HEP-DLSs) have the ability to bind and slowly release heparin-binding growth factors. We hypothesized that DLS-immobilized heparin acts as an antithrombotic coating reagent and binds vascular endothelial growth factor (VEGF) to induce angiogenesis in the DLSs...
July 26, 2016: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/27430962/liver-extracellular-matrix-promotes-bm-mscs-hepatic-differentiation-and-reversal-of-liver-fibrosis-through-activation-of-integrin-pathway
#12
Huanjing Bi, Leiguo Ming, Ruiping Cheng, Hailang Luo, Yongjie Zhang, Yan Jin
In cell-based therapies for liver injuries, the clinical outcomes are closely related to the surrounding microenvironment of the transplanted bone marrow mesenchymal stem cells (BM-MSCs). However, whether liver-specific ECM (L-ECM), as one of major microenvironment signals, could regulate the therapeutic effect of BM-MSCs through changing their biological characteristics is unclear. This study aimed to investigate the hepatogenicity and underlying mechanism of L-ECM as well as its potential regulative role in the MSC-based liver recovery...
July 19, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27314916/enhanced-hepatic-differentiation-of-rat-bone-marrow-derived-mesenchymal-stem-cells-in-spheroidal-aggregate-culture-on-a-decellularized-liver-scaffold
#13
Ji Bao, Qiong Wu, Yujia Wang, Yi Li, Li Li, Fei Chen, Xiujuan Wu, Mingjun Xie, Hong Bu
In the present study, we aimed to determine whether the combination of aggregate culture and decellularized liver scaffolds (DLSs) promoted the hepatic differentiation of murine bone marrow-derived mesenchymal stem cells (BM-MSCs) into high yields of mature hepatocytes in vitro. Four culturing methods for differentiation [single cell (2D), spheroids (3D), 2D + DLS and 3D + DLS] were studied. To determine the differentiation stages of the MSCs, RT-qPCR of the hepatocyte genes, immunostaining of hepatocyte markers, and functional analyses were all performed...
August 2016: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/27186445/ventilation-based-decellularization-system-of-the-lung
#14
Tomoshi Tsuchiya, Julio Mendez, Elizabeth A Calle, Go Hatachi, Ryoichiro Doi, Liping Zhao, Takashi Suematsu, Takeshi Nagayasu, Laura E Niklason
The demand for donated organs greatly exceeds the availability. Alternatives to organ donation, such as laboratory-engineered organs, are therefore being developed. One approach is to decellularize the organ and reseed it with selected cells, ideally from the organ recipient. Organ decellularization has typically been attempted by the administration of detergents into vessels such as the portal vein in the liver. However, in the case of the lung, the airway provides another potential administration route, because it has a wide contact area between cells and detergents in the tracheal tree and alveoli...
2016: BioResearch Open Access
https://www.readbyqxmd.com/read/27184248/a-novel-approach-to-ultrasound-mediated-tissue-decellularization-and-intra-hepatic-cell-delivery-in-rats
#15
Ki Joo Pahk, Goran Hamid Mohammad, Massimo Malago, Nader Saffari, Dipok Kumar Dhar
Liver transplantation is the mainstay of treatment for end stage liver diseases, including metabolic and congenital liver diseases. The number of suitable donor organs is, however, limited, and a whole-liver transplant requires complex surgery. Cell therapy, such as intra-portal hepatocytes transplantation, has been considered as a bridging therapy to liver transplantation but has shown a mixed clinical outcome with limited success, including low level of engraftment of transplanted hepatocytes. Here, we report a novel cell delivery technique in a rat model by creating a cavity inside the liver parenchyma by non-invasive high intensity focused ultrasound histotripsy...
August 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/27169332/nondestructive-methods-for-monitoring-cell-removal-during-rat-liver-decellularization
#16
Sharon Geerts, Sinan Ozer, Maria Jaramillo, Martin L Yarmush, Basak E Uygun
Whole liver engineering holds the promise to create transplantable liver grafts that may serve as substitutes for donor organs, addressing the donor shortage in liver transplantation. While decellularization and recellularization of livers in animal models have been successfully achieved, scale up to human livers has been slow. There are a number of donor human livers that are discarded because they are not found suitable for transplantation, but are available for engineering liver grafts. These livers are rejected due to a variety of reasons, which in turn may affect the decellularization outcome...
July 2016: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/27159223/optimization-of-liver-decellularization-maintains-extracellular-matrix-micro-architecture-and-composition-predisposing-to-effective-cell-seeding
#17
Panagiotis Maghsoudlou, Fanourios Georgiades, Holly Smith, Anna Milan, Panicos Shangaris, Luca Urbani, Stavros P Loukogeorgakis, Benedetta Lombardi, Giuseppe Mazza, Charlotte Hagen, Neil J Sebire, Mark Turmaine, Simon Eaton, Alessandro Olivo, Jasminka Godovac-Zimmermann, Massimo Pinzani, Paul Gissen, Paolo De Coppi
Hepatic tissue engineering using decellularized scaffolds is a potential therapeutic alternative to conventional transplantation. However, scaffolds are usually obtained using decellularization protocols that destroy the extracellular matrix (ECM) and hamper clinical translation. We aim to develop a decellularization technique that reliably maintains hepatic microarchitecture and ECM components. Isolated rat livers were decellularized by detergent-enzymatic technique with (EDTA-DET) or without EDTA (DET). Histology, DNA quantification and proteomics confirmed decellularization with further DNA reduction with the addition of EDTA...
2016: PloS One
https://www.readbyqxmd.com/read/27158925/decellularized-spleen-matrix-for-reengineering-functional-hepatic-like-tissue-based-on-bone-marrow-mesenchymal-stem-cells
#18
Junxi Xiang, Xinglong Zheng, Peng Liu, Lifei Yang, Dinghui Dong, Wanquan Wu, Xuemin Liu, Jianhui Li, Yi Lv
BACKGROUND AND AIMS: Decellularized liver matrix (DLM) hold great potential for reconstructing functional hepatic-like tissue (HLT) based on reseeding of hepatocytes or stem cells, but the shortage of liver donors is still an obstacle for potential application. Therefore, an appropriate alternative scaffold is needed to expand the donor pool. In this study, we explored the effectiveness of decellularized spleen matrix (DSM) for culturing of bone marrow mesenchymal stem cells (BMSCs), and promoting differentiation into hepatic-like cells...
July 2, 2016: Organogenesis
https://www.readbyqxmd.com/read/27134015/heparin-gelatin-mixture-improves-vascular-reconstruction-efficiency-and-hepatic-function-in-bioengineered-livers
#19
Kamal Hany Hussein, Kyung-Mee Park, Kyung-Sun Kang, Heung-Myong Woo
UNLABELLED: Whole organ decellularization is a cell removal process that creates a natural extracellular matrix for use in transplantation. A lack of an intact endothelial layer in the vascular network of decellularized organs results in blood clotting even with anti-coagulation treatment. Furthermore, shear stress caused by blood flow may affect reseeded parenchymal cells. We hypothesized that a heparin-gelatin mixture (HG) can act as an antithrombotic coating reagent and induce attachment and migration of endothelial cells (ECs) on vascular wall surfaces within decellularized livers, with subsequent parenchymal cell function enhancement...
July 1, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27098308/genipin-crosslinking-reduced-the-immunogenicity-of-xenogeneic-decellularized-porcine-whole-liver-matrices-through-regulation-of-immune-cell-proliferation-and-polarization
#20
Yujia Wang, Ji Bao, Xiujuan Wu, Qiong Wu, Yi Li, Yongjie Zhou, Li Li, Hong Bu
Decellularized xenogeneic whole-liver matrices are plausible biomedical materials for the bioengineering of liver transplantation. A common method to reduce the inflammatory potential of xenogeneic matrices is crosslinking. Nevertheless, a comprehensive analysis of the immunogenic features of cross-linked decellularized tissue is still lacking. We aimed to reduce the immunogenicity of decellularized porcine whole-liver matrix through crosslinking with glutaraldehyde or genipin, a new natural agent, and investigated the mechanism of the immune-mediated responses...
2016: Scientific Reports
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