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https://www.readbyqxmd.com/read/29131080/complete-static-repopulation-of-decellularized-porcine-tissues-for-heart-valve-engineering-an-in-vitro-study
#1
Annelies Roosens, Mahtab Asadian, Nathalie De Geyter, Pamela Somers, Ria Cornelissen
To date, a completely in vitro repopulated tissue-engineered heart valve has not been developed. This study focused on sequentially seeding 2 cell populations onto porcine decellularized heart valve leaflets (HVL) and pericardia (PER) to obtain fully repopulated tissues. For repopulation of the interstitium, porcine valvular interstitial cells (VIC) and bone marrow-derived mesenchymal stem cells (BM-MSC) or adipose tissue-derived stem cells (ADSC) were used. In parallel, the culture medium was supplemented with ascorbic acid 2-phosphate (AA) and its effect on recolonization was investigated...
November 8, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/29121258/challenges-in-translating-tissue-engineered-heart-valves-into-clinical-practice
#2
Maximilian Y Emmert, Simon P Hoerstrup
No abstract text is available yet for this article.
March 1, 2017: European Heart Journal
https://www.readbyqxmd.com/read/29096622/tissue-engineered-smooth-muscle-cell-and-endothelial-progenitor-cell-bi-level-cell-sheets-prevent-progression-of-cardiac-dysfunction-microvascular-dysfunction-and-interstitial-fibrosis-in-a-rodent-model-of-type-1-diabetes-induced-cardiomyopathy
#3
Masashi Kawamura, Michael J Paulsen, Andrew B Goldstone, Yasuhiro Shudo, Hanjay Wang, Amanda N Steele, Lyndsay M Stapleton, Bryan B Edwards, Anahita Eskandari, Vi N Truong, Kevin J Jaatinen, Arnar B Ingason, Shigeru Miyagawa, Yoshiki Sawa, Y Joseph Woo
BACKGROUND: Diabetes mellitus is a risk factor for coronary artery disease and diabetic cardiomyopathy, and adversely impacts outcomes following coronary artery bypass grafting. Current treatments focus on macro-revascularization and neglect the microvascular disease typical of diabetes mellitus-induced cardiomyopathy (DMCM). We hypothesized that engineered smooth muscle cell (SMC)-endothelial progenitor cell (EPC) bi-level cell sheets could improve ventricular dysfunction in DMCM. METHODS: Primary mesenchymal stem cells (MSCs) and EPCs were isolated from the bone marrow of Wistar rats, and MSCs were differentiated into SMCs by culturing on a fibronectin-coated dish...
November 2, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29078809/mesenchymal-stem-cells-for-cardiac-repair-are-the-actors-ready-for-the-clinical-scenario
#4
REVIEW
Santiago Roura, Carolina Gálvez-Montón, Clémentine Mirabel, Joaquim Vives, Antoni Bayes-Genis
For years, sufficient progress has been made in treating heart failure following myocardial infarction; however, the social and economic burdens and the costs to world health systems remain high. Moreover, treatment advances have not resolved the underlying problem of functional heart tissue loss. In this field of research, for years we have actively explored innovative biotherapies for cardiac repair. Here, we present a general, critical overview of our experience in using mesenchymal stem cells, derived from cardiac adipose tissue and umbilical cord blood, in a variety of cell therapy and tissue engineering approaches...
October 27, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29066419/effect-of-stem-cell-niche-elasticity-ecm-protein-on-the-self-beating-cardiomyocyte-differentiation-of-inducedpluripotent-stem-ips-cells-at-different-stages
#5
Mitsuhi Hirata, Tetsuji Yamaoka
Stem cell-based myocardial regeneration therapies have emerged as alternative strategies to heart transplantation for serious heart diseases, but autologous beating mature cardiomyocytes are not available. Here we investigated the effect of culture substrates on the cardiomyocyte differentiation of induced pluripotent stem cells (iPSs) in vitro by separately evaluating the following continuous three steps: (1) cardiac marker gene expression, (2) contractile gene expression and self-beating, and (3) beating duration...
October 21, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29065799/fitting-tissue-chips-and-microphysiological-systems-into-the-grand-scheme-of-medicine-biology-pharmacology-and-toxicology
#6
David E Watson, Rosemarie Hunziker, John P Wikswo
Microphysiological systems (MPS), which include engineered organoids (EOs), single organ/tissue chips (TCs), and multiple organs interconnected to create miniature in vitro models of human physiological systems, are rapidly becoming effective tools for drug development and the mechanistic understanding of tissue physiology and pathophysiology. The second MPS thematic issue of Experimental Biology and Medicine comprises 15 articles by scientists and engineers from the National Institutes of Health, the IQ Consortium, the Food and Drug Administration, and Environmental Protection Agency, an MPS company, and academia...
October 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/29057872/modelling-torsade-de-pointes-arrhythmias-in-vitro-in-3d-human-ips-cell-engineered-heart-tissue
#7
Masahide Kawatou, Hidetoshi Masumoto, Hiroyuki Fukushima, Gaku Morinaga, Ryuzo Sakata, Takashi Ashihara, Jun K Yamashita
Torsade de Pointes (TdP) is a lethal arrhythmia that is often drug-induced, thus there is an urgent need for development of models to test or predict the drug sensitivity of human cardiac tissue. Here, we present an in vitro TdP model using 3D cardiac tissue sheets (CTSs) that contain a mixture of human induced pluripotent stem cell (hiPSC)-derived cardiomyocytes and non-myocytes. We simultaneously monitor the extracellular field potential (EFP) and the contractile movement of the CTSs. Upon treatment with IKr channel blockers, CTSs exhibit tachyarrhythmias with characteristics of TdP, including both a typical polymorphic EFP and meandering spiral wave re-entry...
October 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/29057501/different-approaches-to-heart-valve-decellularization-a-comprehensive-overview-of-the-past-30%C3%A2-years
#8
REVIEW
Filippo Naso, Alessandro Gandaglia
Xenogeneic decellularized heart valve scaffolds have the potential to overcome the limitations of existing bioprosthetic heart valves that have limited duration due to calcification and tissue degeneration phenomena. This article presents a review of 30 years of decellularization approaches adopted in cardiovascular tissue engineering, with a focus on the use, either individually or in combination, of different detergents. The safety and efficacy of cell-removal procedures are specifically reported and discussed, as well as the structure and biomechanics of the treated extracellular matrix (ECM)...
October 22, 2017: Xenotransplantation
https://www.readbyqxmd.com/read/29054608/a-sweet-spot-for-fluid-induced-oscillations-in-the-conditioning-of-stem-cell-based-engineered-heart-valve-tissues
#9
Alexander Williams, Sana Nasim, Manuel Salinas, Arash Moshkforoush, Nikolaos Tsoukias, Sharan Ramaswamy
Fluid-induced shear stresses are involved in the development of cardiovascular tissues. In a tissue engineering framework, this stimulus has also been considered as a mechanical regulator of stem cell differentiation. We recently demonstrated that the fluid-oscillating effect in combination with a physiologically-relevant shear stress magnitude contributes to the formation of stem cell-derived de novo heart valve tissues. However, the range of oscillations necessary to induce favorable gene expression and engineered tissue formation is unknown...
October 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29054134/thymus-derived-mesenchymal-stem-cells-for-tissue-engineering-clinical-grade-cardiovascular-grafts
#10
Dominga Iacobazzi, Megan Swim, Ambra Albertario, Massimo Caputo, Mohamed T Ghorbel
Mesenchymal stem cells (MSCs) are attractive tools for regenerative medicine because of their multi-differentiation potential and immunomodulation capacity. In congenital heart defect surgical correction, replacement grafts lacking growth potential are commonly used. Tissue engineering promises to overcome the limitations of these grafts. In this study, we hypothesized that human thymus derived MSCs are a suitable tool to tissue engineer a living vascular graft with good integration and patency once implanted in vivo...
October 20, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29048241/nanofibrous-electrospun-hdecm-based-hybrid-scaffold-as-wound-dressing-for-reducing-scarring
#11
Tae Hee Kim, Youngmee Jung, Soo Hyun Kim
Produced via electrospinning, poly(l-lactide-co-caprolactone) (PLCL) membranes, which have a porous structure and are biodegradable, are of interest in various medical fields. The porous-structured electrospun membrane is particularly interesting because of several favorable properties: it exudes fluid from the wound, does not build up under the wound covering, and does not cause wound desiccation. Moreover, extracellular matrix (ECM)-based structures derived by tissue decellularization have application as engineered tissue scaffolds and as supports for cellular regeneration...
October 19, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29045749/immune-checkpoint-inhibitor-related-myocarditis
#12
Kazuko Tajiri, Kazutaka Aonuma, Ikuo Sekine
Immune checkpoint inhibitors have demonstrated significant clinical benefit in many cancers. The clinical benefit afforded by these treatments can be accompanied by a unique and distinct spectrum of adverse events. Recently, several fatal cases of immune checkpoint inhibitor-related myocarditis were reported. Although its frequency is comparatively lower than that of other immune-related adverse events, myocarditis can lead to circulatory collapse and lethal ventricular arrhythmia. Immune checkpoints, cytotoxic T-lymphocyte antigen 4 (CTLA-4) and programmed cell death protein 1 (PD-1), play important roles in establishing peripheral tolerance to the heart...
October 17, 2017: Japanese Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29045016/liquid-crystalline-networks-toward-regenerative-medicine-and-tissue-repair
#13
Daniele Martella, Paolo Paoli, Josè M Pioner, Leonardo Sacconi, Raffaele Coppini, Lorenzo Santini, Matteo Lulli, Elisabetta Cerbai, Diederik S Wiersma, Corrado Poggesi, Cecilia Ferrantini, Camilla Parmeggiani
The communication reports the use of liquid crystalline networks (LCNs) for engineering tissue cultures with human cells. Their ability as cell scaffolds for different cell lines is demonstrated. Preliminary assessments of the material biocompatibility are performed on human dermal fibroblasts and murine muscle cells (C2C12), demonstrating that coatings or other treatments are not needed to use the acrylate-based materials as support. Moreover, it is found that adherent C2C12 cells undergo differentiation, forming multinucleated myotubes, which show the typical elongated shape, and contain bundles of stress fibers...
October 17, 2017: Small
https://www.readbyqxmd.com/read/29033305/machine-learning-of-human-pluripotent-stem-cell-derived-engineered-cardiac-tissue-contractility-for-automated-drug-classification
#14
Eugene K Lee, David D Tran, Wendy Keung, Patrick Chan, Gabriel Wong, Camie W Chan, Kevin D Costa, Ronald A Li, Michelle Khine
Accurately predicting cardioactive effects of new molecular entities for therapeutics remains a daunting challenge. Immense research effort has been focused toward creating new screening platforms that utilize human pluripotent stem cell (hPSC)-derived cardiomyocytes and three-dimensional engineered cardiac tissue constructs to better recapitulate human heart function and drug responses. As these new platforms become increasingly sophisticated and high throughput, the drug screens result in larger multidimensional datasets...
November 14, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/29031049/heart-valve-scaffold-fabrication-bioinspired-control-of-macro-scale-morphology-mechanics-and-micro-structure
#15
Antonio D'Amore, Samuel K Luketich, Giuseppe M Raffa, Salim Olia, Giorgio Menallo, Antonino Mazzola, Flavio D'Accardi, Tamir Grunberg, Xinzhu Gu, Michele Pilato, Marina V Kameneva, Vinay Badhwar, William R Wagner
Valvular heart disease is currently treated with mechanical valves, which benefit from longevity, but are burdened by chronic anticoagulation therapy, or with bioprosthetic valves, which have reduced thromboembolic risk, but limited durability. Tissue engineered heart valves have been proposed to resolve these issues by implanting a scaffold that is replaced by endogenous growth, leaving autologous, functional leaflets that would putatively eliminate the need for anticoagulation and avoid calcification. Despite the diversity in fabrication strategies and encouraging results in large animal models, control over engineered valve structure-function remains at best partial...
October 6, 2017: Biomaterials
https://www.readbyqxmd.com/read/29024059/superaligned-carbon-nanotubes-guide-oriented-cell-growth-and-promote-electrophysiological-homogeneity-for-synthetic-cardiac-tissues
#16
Jing Ren, Quanfu Xu, Xiaomeng Chen, Wei Li, Kai Guo, Yang Zhao, Qian Wang, Zhitao Zhang, Huisheng Peng, Yi-Gang Li
Cardiac engineering of patches and tissues is a promising option to restore infarcted hearts, by seeding cardiac cells onto scaffolds and nurturing their growth in vitro. However, current patches fail to fully imitate the hierarchically aligned structure in the natural myocardium, the fast electrotonic propagation, and the subsequent synchronized contractions. Here, superaligned carbon-nanotube sheets (SA-CNTs) are explored to culture cardiomyocytes, mimicking the aligned structure and electrical-impulse transmission behavior of the natural myocardium...
October 11, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29018170/temperature-activated-ion-channels-in-neural-crest-cells-confer-maternal-fever-associated-birth-defects
#17
Mary R Hutson, Anna L Keyte, Miriam Hernández-Morales, Eric Gibbs, Zachary A Kupchinsky, Ioannis Argyridis, Kyle N Erwin, Kelly Pegram, Margaret Kneifel, Paul B Rosenberg, Pavle Matak, Luke Xie, Jörg Grandl, Erica E Davis, Nicholas Katsanis, Chunlei Liu, Eric J Benner
Birth defects of the heart and face are common, and most have no known genetic cause, suggesting a role for environmental factors. Maternal fever during the first trimester is an environmental risk factor linked to these defects. Neural crest cells are precursor populations essential to the development of both at-risk tissues. We report that two heat-activated transient receptor potential (TRP) ion channels, TRPV1 and TRPV4, were present in neural crest cells during critical windows of heart and face development...
October 10, 2017: Science Signaling
https://www.readbyqxmd.com/read/29016838/the-hand1-frameshift-a126fs-mutation-does-not-cause-hypoplastic-left-heart-syndrome-in-mice
#18
Beth A Firulli, Kevin P Toolan, Jade Harkin, Hannah Millar, Santiago Pineda, Anthony B Firulli
Aims: To test if a human Hand1 frame shift mutation identified in human samples is causative of hypoplastic left heart syndrome (HLHS). Methods and results: HLHS is a poorly understood single ventricle congenital heart defect that affects two to three infants in every 10 000 live births. The aetiologies of HLHS are largely unknown. The basic helix-loop-helix transcription factor HAND1 is required for normal heart development. Interrogation of HAND1 sequence from fixed HLHS tissues identified a somatic frame-shift mutation at Alanine 126 (NP_004812...
August 31, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28994769/isolation-of-endothelial-progenitor-cells-from-human-umbilical-cord-blood
#19
Prashanth Ravishankar, M Alejandra Zeballos, Kartik Balachandran
The existence of endothelial progenitor cells (EPCs) in peripheral blood and its involvement in vasculogenesis was first reported by Ashara and colleagues(1). Later, others documented the existence of similar types of EPCs originating from bone marrow(2)(,)(3). More recently, Yoder and Ingram showed that EPCs derived from umbilical cord blood had a higher proliferative potential compared to ones isolated from adult peripheral blood(4)(,)(5)(,)(6). Apart from being involved in postnatal vasculogenesis, EPCs have also shown promise as a cell source for creating tissue-engineered vascular and heart valve constructs(7)(,)(8)...
September 14, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28988988/human-induced-pluripotent-stem-cell-derived-cardiomyocyte-encapsulating-bioactive-hydrogels-improve-rat-heart-function-post-myocardial-infarction
#20
Andre Chow, Daniel J Stuckey, Emaddin Kidher, Mark Rocco, Richard J Jabbour, Catherine A Mansfield, Ara Darzi, Sian E Harding, Molly M Stevens, Thanos Athanasiou
Tissue engineering offers an exciting possibility for cardiac repair post myocardial infarction. We assessed the effects of combined polyethylene glycol hydrogel (PEG), human induced pluripotent stem cell-derived cardiomyocyte (iPSC-CM), and erythropoietin (EPO) therapy in a rat model of myocardial infarction. PEG with/out iPSC-CMs and EPO; iPSC-CMs in saline; or saline alone was injected into infarcted hearts shortly after infarction. Injection of almost any combination of the therapeutics limited acute elevations in chamber volumes...
November 14, 2017: Stem Cell Reports
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