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Perfusion decellularization

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https://www.readbyqxmd.com/read/27911373/the-mouse-isolated-perfused-kidney-technique
#1
Jan Czogalla, Frank Schweda, Johannes Loffing
The mouse isolated perfused kidney (MIPK) is a technique for keeping a mouse kidney under ex vivo conditions perfused and functional for 1 hr. This is a prerequisite for studying the physiology of the isolated organ and for many innovative applications that may be possible in the future, including perfusion decellularization for kidney bioengineering or the administration of anti-rejection or genome-editing drugs in high doses to prime the kidney for transplantation. During the time of the perfusion, the kidney can be manipulated, renal function can be assessed, and various pharmaceuticals administered...
November 17, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27911030/acellular-endocardium-as-a-novel-biomaterial-for-the-intima-of-tissue-engineered-small-caliber-vascular-grafts
#2
Feng Wang, Xin Guan, TianYi Wu, JianOu Qiao, ZhaoQing Han, JinLong Wu, XiaoWei Yu, QingJun You
We aimed to investigate whether acellular endocardium can be used as a useful biomaterial for the intima of engineered small-caliber vascular grafts. Fresh endocardium was harvested from the swine left atrium and was decellularized by digestion with the decellularization solution of Triton X-100 and SDS containing DNase I and RNase A. Surface morphological characteristics and Young's modulus were evaluated. To analyze the effect of mechanical characteristics on cell adhesion, the decellularized endocardium was stiffened with 2...
December 2016: Artificial Organs
https://www.readbyqxmd.com/read/27894293/lung-bioengineering-physical-stimuli-and-stem-progenitor-cell-biology-interplay-towards-biofabricating-a-functional-organ
#3
REVIEW
Paula N Nonaka, Juan J Uriarte, Noelia Campillo, Vinicius R Oliveira, Daniel Navajas, Ramon Farré
A current approach to obtain bioengineered lungs as a future alternative for transplantation is based on seeding stem cells on decellularized lung scaffolds. A fundamental question to be solved in this approach is how to drive stem cell differentiation onto the different lung cell phenotypes. Whereas the use of soluble factors as agents to modulate the fate of stem cells was established from an early stage of the research with this type of cells, it took longer to recognize that the physical microenvironment locally sensed by stem cells (e...
November 28, 2016: Respiratory Research
https://www.readbyqxmd.com/read/27884776/inverted-orientation-improves-decellularization-of-whole-porcine-hearts
#4
Po-Feng Lee, Eric Chau, Rafael Cabello, Alvin T Yeh, Luiz C Sampaio, Andrea S Gobin, Doris A Taylor
In structurally heterogeneous organs, such as heart, it is challenging to retain extracellular matrix integrity in the thinnest regions (eg, valves) during perfusion decellularization and completely remove cellular debris from thicker areas. The high inflow rates necessary to maintain physiologic pressure can distend or damage thin tissues, but lower pressures prolong the process and increase the likelihood of contamination. We examined two novel retrograde decellularization methods for porcine hearts: inverting the heart or venting the apex to decrease inflow rate...
November 21, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27871686/eliminating-the-organ-transplant-waiting-list-the-future-with-perfusion-decellularized-organs
#5
REVIEW
Dominique Seetapun, Jeffrey J Ross
No abstract text is available yet for this article.
November 18, 2016: Surgery
https://www.readbyqxmd.com/read/27862079/discarded-livers-find-a-new-life-engineered-liver-grafts-using-hepatocytes-recovered-from-marginal-livers
#6
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/27826794/the-challenge-in-using-mesenchymal-stromal-cells-for-recellularization-of-decellularized-cartilage
#7
REVIEW
Zhao Huang, Owen Godkin, Gundula Schulze-Tanzil
Some decellularized musculoskeletal extracellular matrices (ECM)s derived from tissues such as bone, tendon and fibrocartilaginous meniscus have already been clinical use for tissue reconstruction. Repair of articular cartilage with its unique zonal ECM architecture and composition is still an unsolved problem, and the question is whether allogenic or xenogeneic decellularized cartilage ECM could serve as a biomimetic scaffold for this purpose.Hence, this survey outlines the present state of preparing decellularized cartilage ECM-derived scaffolds or composites for reconstruction of different cartilage types and of reseeding it particularly with mesenchymal stromal cells (MSCs)...
November 8, 2016: Stem Cell Reviews
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
#8
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/27784199/dynamic-autologous-re-endothelializaition-of-small-caliber-arterial-extracellular-matrix-a-preclinical-large-animal-study
#9
Nitsan Dahan, Udi Sarig, Tomer Bronshtein, Limor Baruch, Tony Karram, Aaron Hoffman, Marcelle Machluf
Effective cellularization is a key approach to prevent small-caliber (<4mm) tissue engineered vascular graft (TEVG) failure and maintain patency and contractility following implantation. To achieve this goal, however, improved bio-mimicking designs, and/or relatively long production times (typically several months) are required. We previously reported on porcine carotid artery decellularization yielding biomechanically stable, and cell supportive small caliber (3-4mm diameter, 5cm long) arterial extracellular matrix (scaECM) vascular grafts...
October 26, 2016: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/27720934/in-vivo-organ-engineering-perfusion-of-hepatocytes-in-a-single-liver-lobe-scaffold-of-living-rats
#10
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/27676406/investigating-neovascularization-in-rat-decellularized-intestine-an-in-vitro-platform-for-studying-angiogenesis
#11
Lindsey Dew, William R English, Chuh K Chong, Sheila MacNeil
One of the main challenges currently faced by tissue engineers is the loss of tissues post implantation due to delayed neovascularization. Several strategies are under investigation to create vascularized tissue but none have yet overcome this problem. In this study we produced a decellularized natural vascular scaffold from rat intestine to use as an in vitro platform for neovascularization studies for tissue engineered constructs. Decellularization resulted in almost complete (97%) removal of nuclei and DNA, while collagen, glycosaminoglycans and laminin content was preserved...
September 27, 2016: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/27622532/regenerative-potential-of-human-airway-stem-cells-in-lung-epithelial-engineering
#12
Sarah E Gilpin, Jonathan M Charest, Xi Ren, Luis F Tapias, Tong Wu, Daniele Evangelista-Leite, Douglas J Mathisen, Harald C Ott
Bio-engineered organs for transplantation may ultimately provide a personalized solution for end-stage organ failure, without the risk of rejection. Building upon the process of whole organ perfusion decellularization, we aimed to develop novel, translational methods for the recellularization and regeneration of transplantable lung constructs. We first isolated a proliferative KRT5(+)TP63(+) basal epithelial stem cell population from human lung tissue and demonstrated expansion capacity in conventional 2D culture...
November 2016: Biomaterials
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
#13
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/27405270/novel-perfusion-decellularized-method-to-prepare-decellularized-ureters-for-ureteral-tissue-engineered-repair
#14
Shu-Wei Xiao, Peng-Chao Wang, Wei-Jun Fu, Zhong-Xin Wang, Gang Li, Xu Zhang
As the endoscopic technique is widely used in the diagnosis and treatment of diseases, the incidence of ureteral injuries increases annually. The classical surgical therapies are not always satisfactory. With the constant development of the tissue engineering technology in the field of urinary reconstruction, the ureteral reconstruction has become possible technology. In this study, a novel perfusion-decellularized protocol, which combined a perfusion system with the commonly used physical and chemical methods, was used to prepare the decellularized ureters for ureteral reconstruction and the urinary tract-derived cells (UDCs) were seeded on the surface of the perfusion-decellularized ureters (PDUs) in order to observe the cells survival, adhesion, proliferation and distribution...
July 9, 2016: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/27350058/endocrine-pancreas-engineered-using-porcine-islets-and-partial-pancreatic-scaffolds
#15
Yusuke Katsuki, Hiroshi Yagi, Teru Okitsu, Minoru Kitago, Kazuki Tajima, Yoshie Kadota, Taizo Hibi, Yuta Abe, Masahiro Shinoda, Osamu Itano, Shoji Takeuchi, Yuko Kitagawa
OBJECTIVES: Because therapeutic options for severe diabetes are currently limited, there is a continuing need for new therapeutic strategies, especially in the field of regenerative medicine. Collaborative efforts across the fields of tissue engineering technology and islet biology may be able to create functionally engineered islets capable of restoring endocrine function in patients with insulin-dependent diabetes. METHODS: This engineered scaffold was seeded with isolated primary porcine islets via the pancreatic duct using a multi-step infusion technique...
September 2016: Pancreatology: Official Journal of the International Association of Pancreatology (IAP) ... [et Al.]
https://www.readbyqxmd.com/read/27331090/data-from-acellular-human-heart-matrix
#16
Pedro L Sánchez, M Eugenia Fernández-Santos, M Angeles Espinosa, M Angeles González-Nicolas, Judith R Acebes, Salvatore Costanza, Isabel Moscoso, Hugo Rodríguez, Julio García, Jesús Romero, Stefan M Kren, Javier Bermejo, Raquel Yotti, Candelas Pérez Del Villar, Ricardo Sanz-Ruiz, Jaime Elizaga, Doris A Taylor, Francisco Fernández-Avilés
Perfusion decellularization of cadaveric hearts removes cells and generates a cell-free extracellular matrix scaffold containing acellular vascular conduits, which are theoretically sufficient to perfuse and support tissue-engineered heart constructs. This article contains additional data of our experience decellularizing and testing structural integrity and composition of a large series of human hearts, "Acellular human heart matrix: a critical step toward whole heat grafts" (Sanchez et al., 2015) [1]. Here we provide the information about the heart decellularization technique, the valve competence evaluation of the decellularized scaffolds, the integrity evaluation of epicardial and myocardial coronary circulation, the pressure volume measurements, the primers used to assess cardiac muscle gene expression and, the characteristics of donors, donor hearts, scaffolds and perfusion decellularization process...
September 2016: Data in Brief
https://www.readbyqxmd.com/read/27306665/tissue-engineered-autologous-grafts-for-facial-bone-reconstruction
#17
Sarindr Bhumiratana, Jonathan C Bernhard, David M Alfi, Keith Yeager, Ryan E Eton, Jonathan Bova, Forum Shah, Jeffrey M Gimble, Mandi J Lopez, Sidney B Eisig, Gordana Vunjak-Novakovic
Facial deformities require precise reconstruction of the appearance and function of the original tissue. The current standard of care-the use of bone harvested from another region in the body-has major limitations, including pain and comorbidities associated with surgery. We have engineered one of the most geometrically complex facial bones by using autologous stromal/stem cells, native bovine bone matrix, and a perfusion bioreactor for the growth and transport of living grafts, without bone morphogenetic proteins...
June 15, 2016: Science Translational Medicine
https://www.readbyqxmd.com/read/27227902/comparative-study-of-two-perfusion-routes-with-different-flow-in-decellularization-to-harvest-an-optimal-pulmonary-scaffold-for-recellularization
#18
Zhiyi Wang, Zhibin Wang, Qing Yu, Haitao Xi, Jie Weng, Xiaohong Du, Daqing Chen, Jianshe Ma, Jin Mei, Chan Chen
Decellularization processes may variably distort or degrade extracellular matrix (ECM) structure. In this study, two perfusion routes (PR) were tested on SD rat lung samples. One decellularization protocol, PR1, was perfused through the pulmonary artery. The other decellularization protocol, PR2, was perfused through the trachea. Both decellularization protocols were used by the same detergent-based (sodium dodecyl sulphate and Triton X-100) with different flow continuous perfusion. There was no visible difference in vessel architecture between PR1- and PR2-decellularized scaffold...
October 2016: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/27187768/is-transcatheter-aortic-valve-implantation-of-living-tissue-engineered-valves-feasible-an-in-vitro-evaluation-utilizing-a-decellularized-and-reseeded-biohybrid-valve
#19
Fabian Koenig, Jang-Sun Lee, Bassil Akra, Trixi Hollweck, Erich Wintermantel, Christian Hagl, Nikolaus Thierfelder
Transcatheter aortic valve implantation (TAVI) is a fast-growing, exciting field of invasive therapy. During the last years many innovations significantly improved this technique. However, the prostheses are still associated with drawbacks. The aim of this study was to create cell-seeded biohybrid aortic valves (BAVs) as an ideal implant by combination of assets of biological and artificial materials. Furthermore, the influence of TAVI procedure on tissue-engineered BAV was investigated. BAV (n=6) were designed with decellularized homograft cusps and polyurethane walls...
August 2016: Artificial Organs
https://www.readbyqxmd.com/read/27180196/a-first-vascularized-skin-equivalent-for-as-an-alternative-to-animal-experimentation
#20
Florian Groeber, Lisa Engelhardt, Julia Lange, Szymon Kurdyn, Freia F Schmid, Christoph Rücker, Stephan Mielke, Heike Walles, Jan Hansmann
Tissue-engineered skin equivalents mimic key aspects of the human skin, and can thus be employed as wound coverage for large skin defects or as in vitro test systems as an alternative to animal models. However, current skin equivalents lack a functional vasculature limiting clinical and research applications. This study demonstrates the generation of a vascularized skin equivalent with a perfused vascular network by combining a biological vascularized scaffold (BioVaSc) based on a decellularized segment of a porcine jejunum and a tailored bioreactor system...
May 15, 2016: ALTEX
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