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Tissue Engineering. Part C, Methods

Maki Takeda, Shigeru Miyagawa, Satsuki Fukushima, Atsuhiro Saito, Emiko Ito, Akima Harada, Ryohei Matsuura, Hiroko Iseoka, Nagako Sougawa, Noriko Mochizuki-Oda, Michiya Matsusaki, Mitsuru Akashi, Yoshiki Sawa
An in vitro drug-induced cardiotoxicity assay is a critical step in drug discovery for clinical use. The use of human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) is promising for this purpose. However, single hiPSC-CMs are limited in their ability to mimic native cardiac tissue structurally and functionally, and the generation of artificial cardiac tissue using hiPSC-CMs is an ongoing challenging. We therefore developed a new method of constructing three-dimensional (3D) artificial tissues in a short time by coating extracellular matrix (ECM) components on cell surfaces...
November 17, 2017: Tissue Engineering. Part C, Methods
Frank H Lau, Kelly Vogel, John P Luckett, Maxwell Hunt, Alicia Meyer, Camille L Rogers, Oren Tessler, Charles L Dupin, Hugo St Hilaire, Kazi N Islam, Trivia Frazier, Jeffrey Gimble, Steven Scahill
White adipose tissue (WAT) is a critical organ in both health and disease. However, physiologically faithful tissue culture models of primary human WAT remain limited, at best. Here we describe a novel WAT culture system in which primary human WAT is sandwiched between tissue-engineered sheets of adipose-derived stromal cells. This construct, called "sandwiched white adipose tissue" (SWAT), can be defined as a Microphysiological System (MPS) since it is a tissue-engineered, multicellular, 3D organ construct produced using human cells...
November 16, 2017: Tissue Engineering. Part C, Methods
Giovanna Desando, Isabella Bartolotti, Carola Cavallo, Antonella Schiavinato, Cynthia Secchieri, Elizaveta Kon, Giuseppe Filardo, Maurizio Paro, Brunella Grigolo
The evaluation of key factors modulating cell homing following transplantation can provide new insights in the comprehension of unsolved biological questions about the use of cell therapies for osteoarthritis (OA). The main purpose of this in vivo study was to investigate the biodistribution of an intra-articular (IA) injection of mesenchymal stromal cells (MSCs) and bone marrow concentrate (BMC) in a rabbit OA model, and whether the additional use of sodium hyaluronate (HA) could modulate their migration and promote joint repair...
November 6, 2017: Tissue Engineering. Part C, Methods
Karolina Theodoridis, Igor Tudorache, Serghei Cebotari, Alexandru Calistru, Tanja Meyer, Samir Sarikouch, Christoph Bara, Axel Haverich, Andres Hilfiker
Tissue-engineered (TE) grafts based on decellularized grafts have shown very promising results in preclinical and clinical studies. However, in animal models valves have either been tested in juvenile models or in the clinically less relevant pulmonary valve position. In this study, we tested the grafts in the aortic valve (AV) position of 6-year-old sheep, as geriatric patients in need of an AV substitute due to calcification are the largest patient group benefiting from TE grafts. Decellularized AV (DAV; n = 4) and DAV additionally re-endothelialized with autologous cells (n = 3) were implanted in the AV position of 6-year-old female sheep...
November 3, 2017: Tissue Engineering. Part C, Methods
Thafar Almela, Sarmad Al-Sahaf, Robert Bolt, Ian Brook, K Moharamzadeh
Advances in tissue engineering have permitted assembly of multi-layered composite tissue constructs for potential applications in the treatment of combined hard and soft tissue defects and as an alternative in vitro test model to animal experimental systems. The aim of this study was to develop and characterize a novel three-dimensional combined human alveolar bone and gingival mucosal model based on primary cells isolated from the oral tissues. Bone component of the model was engineered by seeding primary human alveolar osteoblasts (HAOBs) into a hydroxyapatite/tricalcium phosphate (HA/TCP) scaffold and culturing in a spinner bioreactor...
November 1, 2017: Tissue Engineering. Part C, Methods
Jorge Piedrahita, J Koudy Williams
Introduction letter to the Animal Models in Tissue Engineering Part II.
November 1, 2017: Tissue Engineering. Part C, Methods
Yu Zhou, Daniel Lovell, Maigen Bethea, Benyam Yoseph, James Poteracki, Shay Soker, Tracy Criswell
Sarcopenia is defined as the loss of skeletal muscle mass and function due to age, and represents a major cause of disability in the elderly population. The contributing factors to the onset of sarcopenia are not well defined, but appear to involve age-dependent changes in both the tissue micro-environment and muscle progenitor cell (MPC) population. MPC transplantation has the potential to be a novel therapy for treatment of muscle dysfunction due to aging or injury, but has not shown significant clinical efficacy to date...
November 1, 2017: Tissue Engineering. Part C, Methods
Juan M Bellón, Marta Rodríguez, Bárbara Pérez-Köhler, Paloma Pérez-López, Gemma Pascual
In this report, we review the use of the New Zealand White rabbit as the experimental animal for several models of abdominal wall repair. For the repair of an abdominal wall defect, such as a hernia in clinical practice, multiple types of prosthetic material exist. Before their marketing, each of these biomaterials needs to be tested in a preclinical setting to confirm its biocompatibility and appropriate behavior at the different tissue interfaces. For preclinical trials, we have always used the New Zealand White rabbit as the model owing to its ease of handling and suitable size...
October 27, 2017: Tissue Engineering. Part C, Methods
Karim M Fawzy El-Sayed, Christof E Dörfer
The human periodontium is a uniquely complex vital structure, supporting and anchoring the teeth in their alveolar sockets, thereby playing a decisive role in tooth homeostasis and function. Chronic periodontitis is a highly prevalent immune-inflammatory disease of the periodontium, affecting 15% of adult individuals, and is characterized by progressive destruction of the periodontal tooth-investing tissues, culminating in their irreversible damage. Current periodontal evidence-based treatment strategies achieve periodontal healing via repair processes, mostly combating the inflammatory component of the disease, to halt or reduce prospective periodontal tissue loss...
October 25, 2017: Tissue Engineering. Part C, Methods
Mohammad Izadifar, Dean Chapman, Paul Babyn, Xiongbiao Chen, Michael E Kelly
Biofabrication of cell supportive cardiac patches that can be directly implanted on myocardial infarct is a potential solution for myocardial infarction repair. Ideally, cardiac patches should be able to mimic myocardium extracellular matrix for rapid integration with the host tissue, raising the need to develop cardiac constructs with complex features. In particular, cardiac patches should be electrically conductive, mechanically robust and elastic, biologically active and pre-vascularized.. In this study, we aim to biofabricate a nano-reinforced hybrid cardiac patch laden with human coronary artery endothelial cells (HCAECs) with improved electrical, mechanical and biological behavior...
October 19, 2017: Tissue Engineering. Part C, Methods
Mrignayani Kotecha, Boris Epel, Sriram Ravindran, Deborah Dorcemus, Syam Nukavarapu, Howard Halpern
Oxygen is the single most important molecule for sustaining life and, therefore, an important variable in tissue engineering and regenerative medicine. It has been shown that the change in oxygen concentration in an artificial or tissue-engineered graft affects cell survival, differentiation, and tissue growth in profound ways. However, at present, there are no reliable methods to map partial oxygen pressure (pO2) in growing artificial tissues. Here, we adapt and test the suitability of electron paramagnetic resonance oxygen imaging (EPROI) in assessing tissue graft oxygenation in vitro...
October 12, 2017: Tissue Engineering. Part C, Methods
Jukka Pajarinen, Akira Nabeshima, Tzu-Hua Lin, Taishi Sato, Emmanuel Gibon, Eemeli Jämsen, Laura Lu, Karthik Nathan, Zhenyu Yao, Stuart B Goodman
Periprosthetic osteolysis and subsequent aseptic loosening of total joint replacements are driven by byproducts of wear released from the implant. Wear particles cause macrophage mediated inflammation that culminates with periprosthetic bone loss. Most current animal models of particle- induced osteolysis are based on the acute inflammatory reaction induced by wear debris, which is distinct from the slowly progressive clinical scenario. To address this limitation we previously developed a murine model of periprosthetic osteolysis that is based on slow continuous delivery of wear particles into the murine distal femur over a period of 4 weeks...
October 5, 2017: Tissue Engineering. Part C, Methods
Tohru Takaseya, Hideyuki Fumoto, Junmin Zhu, Akira Shiose, Mariko Kobayashi, Masako Fujiki, Yoko Arakawa, Raymond Dessoffy, Larry D Kramer, Kiyotaka Fukamachi
We established an acute animal model for early, straightforward, and reproducible assessment of a biocompatible material interface. Bilateral femoral artery-to-vein shunts were created in 12 pigs: two tubes per shunt, the left two coated, the right two uncoated. We evaluated two groups: Uncontrolled Flow (UF; shunt flow unregulated) and Controlled Flow (CF; shunt flow ~50 ml/min). For each case on each side, two shunts were evaluated: one for 1 hr, the other for 3 hrs. Arterial blood gas and complete blood count were recorded at baseline, 1 hr, and 3 hrs...
October 5, 2017: Tissue Engineering. Part C, Methods
Anna Theresa Hofmann, Sabine Neumann, James Crawford Ferguson, Heinz Redl, Rainer Mittermayr
Delayed wound healing and the potentially resulting chronic wounds are a challenging clinical problem. Available therapeutic strategies are limited in both number and efficacy. For developing and establishing novel treatment approaches appropriate clinical relevant animal models are essential. The aim of the study was to establish a reliable and reproducible delayed wound healing model which simulates the clinical scenario of compromised vascular tissue perfusion (hypoxia/ischemia). Therefore a standard rodent ischemic flap model was modified by challenging the tissue with ascending degrees of ischemia using different surgical approaches (minimal, mild, moderate and severe ischemic invasive approach)...
October 5, 2017: Tissue Engineering. Part C, Methods
Sarah Berndt, Ioana Konz, Didier Colin, Stéphane Germain, Brigitte Pittet-Cuénod, Harm-Anton Klok, Ali Modarressi
Tissue engineering technologies are new and promising techniques in fat tissue reconstruction. However, to assess their efficacy before any clinical application, in vivo experiments are mandatory. This study assesses whether microcomputed tomography (CT) scan imaging is suitable to analyze in vivo the behavior of injected engineered polymer and changes in fat tissue. The volume of mice inguinal fat pads and the resorption rate of different polymers were analyzed by CT scan for up to 3 months. Different biomaterials were used, including our innovative microspheres loaded with oleic acid...
October 3, 2017: Tissue Engineering. Part C, Methods
Andrzej Brzezinski, Salim A Ghodbane, Jay M Patel, Barbara A Perry, Charles J Gatt, Michael G Dunn
Meniscus injuries represent one of the most-common intra-articular knee injuries. The current treatment options include meniscectomy and allograft transplantation, both with poor long-term outcomes. Therefore, there is a need for regenerative techniques to restore meniscal function. To preclinically test scaffolds for meniscus replacement, large animal models need to be established and standardized. This review establishes the anatomical and compositional similarities between human and sheep menisci and provides guidance for implantation and evaluation of such devices...
September 29, 2017: Tissue Engineering. Part C, Methods
Liqing Song, Mohammad Faisel Ahmed, Yan Li, Julie Bejoy, Changchun Zeng, Yan Li
Poly-ɛ-caprolactone (PCL) based microspheres have received much attention as drug or growth factor delivery carriers and tissue engineering scaffolds due to their biocompatibility, biodegradability, and tunable biophysical properties. In addition, PCL and polydimethylsiloxane (PDMS) can be fabricated into thermoresponsive shape memory polymers for various biomedical applications (e.g., smart sutures and vascular stents). However, the influence of biophysical properties of PCL-PDMS based microspheres on stem cell lineage commitment has not been well understood...
September 28, 2017: Tissue Engineering. Part C, Methods
Brian C Syverud, Eric Lin, Sunitha Nagrath, Lisa Marie Larkin
Skeletal muscle satellite cells have tremendous therapeutic potential in cell therapy or skeletal muscle tissue engineering. Obtaining a sufficiently pure satellite cell population, however, presents a significant challenge. We hypothesized that size differences between satellite cells and fibroblasts, two primary cell types obtained from skeletal muscle dissociation, would allow for label-free, inertial separation in a microfluidic device, termed a "Labyrinth", and that these purified satellite cells could be used to engineer skeletal muscle...
September 25, 2017: Tissue Engineering. Part C, Methods
Yukiharu Sugimura, Anna Kathrin Schmidt, Artur Lichtenberg, Alexander Assmann, Payam Akhyari
The demand for an improvement of the biocompatibility and durability of vascular and valvular implants requires translational animal models to study the in vivo fate of cardiovascular grafts. In the present article, a review on the development and application of a microsurgical rat model of infrarenal implantation of aortic grafts and aortic valved conduits is provided. By refinement of surgical techniques and inclusion of hemodynamic considerations, a functional model has been created, which provides a modular platform for the in vivo assessment of biological and tissue-engineered grafts...
September 20, 2017: Tissue Engineering. Part C, Methods
Andrew Reyes Padalhin, Chanmi Park, Byong-Taek Lee
Kidney regeneration is a complex process that can only be studied in vitro at a limited capacity due to the inherent structural and functional complexity of its tissues. Thus, a suitable platform for conducting cellular response and development should be established from decellularized tissues with intact microarchitecture. In this study, a modular streamlined system was developed to allow manageable handling and set-up of in vitro studies using decellularized rat kidneys. The system is composed of commercially available parts that can be reused, interchanged, and re-configured based on the desired experimental stage and process...
September 19, 2017: Tissue Engineering. Part C, Methods
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