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Journal of Tissue Engineering

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https://www.readbyqxmd.com/read/29785258/intra-articular-biomaterials-assisted-delivery-to-treat-temporomandibular-joint-disorders
#1
Khandmaa Dashnyam, Jung-Hwan Lee, Nandin Mandakhbayar, Guang-Zhen Jin, Hae-Hyoung Lee, Hae-Won Kim
The temporomandibular joint disorder, also known as myofascial pain syndrome, is considered one of the prevalent chronic pain diseases caused by muscle inflammation and cartilage degradation in head and neck, and thus influences even biopsychosocial conditions in a lifetime. There are several current treatment methodologies relieving inflammation and preventing degradation of the joint complex. One of the promising non-surgical treatment methods is an intra-articular injection of drugs such as corticosteroids, analgesics, and anti-depressants...
January 2018: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29780570/engineering-a-microcirculation-for-perfusion-control-of-ex-vivo-assembled-organ-systems-challenges-and-opportunities
#2
REVIEW
Pavan Kottamasu, Ira Herman
Donor organ shortage remains a clear problem for many end-stage organ patients around the world. The number of available donor organs pales in comparison with the number of patients in need of these organs. The field of tissue engineering proposes a plausible solution. Using stem cells, a patient's autologous cells, or allografted cells to seed-engineered scaffolds, tissue-engineered constructs can effectively supplement the donor pool and bypass other problems that arise when using donor organs, such as who receives the organ first and whether donor organ rejection may occur...
January 2018: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29774140/three-dimensional-printing-in-maxillofacial-surgery-hype-versus-reality
#3
Alaa Aldaadaa, Nazanin Owji, Jonathan Knowles
Three-dimensional printing technology is getting more attention recently, especially in the craniofacial region. This is a review of literature enlightening the materials that have been used to date and the application of such technology within the scope of maxillofacial surgery.
January 2018: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29686829/the-potential-role-of-bioengineering-and-three-dimensional-printing-in-curing-global-corneal-blindness
#4
REVIEW
Parker E Ludwig, Trevor J Huff, Jorge M Zuniga
An insufficiency of accessible allograft tissue for corneal transplantation leaves many impaired by untreated corneal disease. There is promise in the field of regenerative medicine for the development of autologous corneal tissue grafts or collagen-based scaffolds. Another approach is to create a suitable corneal implant that meets the refractive needs of the cornea and is integrated into the surrounding tissue but does not attempt to perfectly mimic the native cornea on a cellular level. Materials that have been investigated for use in the latter concept include natural polymers such as gelatin, semisynthetic polymers like gelatin methacrylate, and synthetic polymers...
January 2018: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29662670/extended-bioreactor-conditioning-of-mononuclear-cell-seeded-heart-valve-scaffolds
#5
Mitchell VeDepo, Eric Buse, Rachael Quinn, Richard Hopkins, Gabriel Converse
The tissue-engineered heart valve may be the ideal valve replacement option but still must overcome challenges in leaflet recellularization. This study sought to investigate the potential for leaflet matrix restoration and repopulation following mononuclear cell seeding and extended periods of bioreactor conditioning. Human aortic heart valves were seeded with mononuclear cells and conditioned in a pulsatile bioreactor for 3 days, 3 weeks, or 6 weeks. The results of this study determined that a mononuclear cell population can be readily localized within the leaflet tissue in as little as 3 days...
January 2018: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29636893/a-3d-printed-passive-ultrasound-phase-interference-compensator-for-reduced-wave-degradation-in-cancellous-bone-an-experimental-study-in-replica-models
#6
Christian M Langton, Saeed M AlQahtani, Marie-Luise Wille
The current 'active' solution to overcome the impediment of ultrasound wave degradation associated with transit-time variation in complex tissue structures, such as the skull, is to vary the transmission delay of ultrasound pulses from individual transducer elements. This article considers a novel 'passive' solution in which constant transit time is achieved by propagating through an additional material layer positioned between the ultrasound transducer and the test sample. To test the concept, replica models based on four cancellous bone natural tissue samples and their corresponding passive ultrasound phase-interference compensator were 3D-printed...
January 2018: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29623184/emerging-properties-of-hydrogels-in-tissue-engineering
#7
Jung-Hwan Lee, Hae-Won Kim
Hydrogels are three-dimensional polymeric networks filled with water and mimic tissue environments. Therefore, they are considered optimal to deliver cells and engineer damaged tissues. The hydrogel networks have been significantly modified to endow biochemical functionality with adhesive ligands, growth factors, or degradable sites that are helpful to drive proper cell functions. Recently, some of the biophysical properties of hydrogels have emerged as key players in dictating cell fate. Beyond static stiffness, time-dependent stress/strain changes in the interaction with cells and the cell-mediated degradation and matrix synthesis have been demonstrated to shape cell status and tissue repair process...
January 2018: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29568478/toward-a-patient-specific-tissue-engineered-vascular-graft
#8
Cameron Best, Robert Strouse, Kan Hor, Victoria Pepper, Amy Tipton, John Kelly, Toshiharu Shinoka, Christopher Breuer
Integrating three-dimensional printing with the creation of tissue-engineered vascular grafts could provide a readily available, patient-specific, autologous tissue source that could significantly improve outcomes in newborns with congenital heart disease. Here, we present the recent case of a candidate for our tissue-engineered vascular graft clinical trial deemed ineligible due to complex anatomical requirements and consider the application of three-dimensional printing technologies for a patient-specific graft...
January 2018: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29399319/engineering-large-cartilage-tissues-using-dynamic-bioreactor-culture-at-defined-oxygen-conditions
#9
Andrew C Daly, Binulal N Sathy, Daniel J Kelly
Mesenchymal stem cells maintained in appropriate culture conditions are capable of producing robust cartilage tissue. However, gradients in nutrient availability that arise during three-dimensional culture can result in the development of spatially inhomogeneous cartilage tissues with core regions devoid of matrix. Previous attempts at developing dynamic culture systems to overcome these limitations have reported suppression of mesenchymal stem cell chondrogenesis compared to static conditions. We hypothesize that by modulating oxygen availability during bioreactor culture, it is possible to engineer cartilage tissues of scale...
January 2018: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29375756/the-use-of-human-dental-pulp-stem-cells-for-in-vivo-bone-tissue-engineering-a-systematic-review
#10
REVIEW
Alessander Leyendecker Junior, Carla Cristina Gomes Pinheiro, Tiago Lazzaretti Fernandes, Daniela Franco Bueno
Dental pulp represents a promising and easily accessible source of mesenchymal stem cells for clinical applications. Many studies have investigated the use of human dental pulp stem cells and stem cells isolated from the dental pulp of human exfoliated deciduous teeth for bone tissue engineering in vivo. However, the type of scaffold used to support the proliferation and differentiation of dental stem cells, the animal model, the type of bone defect created, and the methods for evaluation of results were extremely heterogeneous among these studies conducted...
January 2018: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29344334/collective-adhesion-and-displacement-of-retinal-progenitor-cells-upon-extracellular-matrix-substrates-of-transplantable-biomaterials
#11
Ankush Thakur, Shawn Mishra, Juan Pena, Jing Zhou, Stephen Redenti, Robert Majeska, Maribel Vazquez
Strategies to replace retinal photoreceptors lost to damage or disease rely upon the migration of replacement cells transplanted into sub-retinal spaces. A significant obstacle to the advancement of cell transplantation for retinal repair is the limited migration of transplanted cells into host retina. In this work, we examine the adhesion and displacement responses of retinal progenitor cells on extracellular matrix substrates found in retina as well as widely used in the design and preparation of transplantable scaffolds...
January 2018: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29318001/new-stereolithographic-resin-providing-functional-surfaces-for-biocompatible-three-dimensional-printing
#12
Andreas Hoffmann, Holger Leonards, Nora Tobies, Ludwig Pongratz, Klaus Kreuels, Franziska Kreimendahl, Christian Apel, Martin Wehner, Nadine Nottrodt
Stereolithography is one of the most promising technologies for the production of tailored implants. Within this study, we show the results of a new resin formulation for three-dimensional printing which is also useful for subsequent surface functionalization. The class of materials is based on monomers containing either thiol or alkene groups. By irradiation of the monomers at a wavelength of 266 nm, we demonstrated an initiator-free stereolithographic process based on thiol-ene click chemistry. Specimens made from this material have successfully been tested for biocompatibility...
January 2017: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29318000/methacrylated-gelatin-hyaluronan-based-hydrogels-for-soft-tissue-engineering
#13
Lukas Kessler, Sandra Gehrke, Marc Winnefeld, Birgit Huber, Eva Hoch, Torsten Walter, Ralf Wyrwa, Matthias Schnabelrauch, Malte Schmidt, Maximilian Kückelhaus, Marcus Lehnhardt, Tobias Hirsch, Frank Jacobsen
In vitro-generated soft tissue could provide alternate therapies for soft tissue defects. The aim of this study was to evaluate methacrylated gelatin/hyaluronan as scaffolds for soft tissue engineering and their interaction with human adipose-derived stem cells (hASCs). ASCs were incorporated into methacrylated gelatin/hyaluronan hydrogels. The gels were photocrosslinked with a lithium phenyl-2,4,6-trimethylbenzoylphosphinate photoinitiator and analyzed for cell viability and adipogenic differentiation of ASCs over a period of 30 days...
January 2017: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29276579/compositional-dependency-on-dissolution-rate-and-cytocompatibility-of-phosphate-based-glasses-effect-of-b-2-o-3-and-fe-2-o-3-addition
#14
Nusrat Sharmin, Fu Gu, Ifty Ahmed, Andrew J Parsons
The unique property of phosphate-based glasses and fibres to be completely dissolved in aqueous media is largely dependent on the glass composition. This article focuses on investigating the effect of replacing Na2 O with 3 and 5 mol% Fe2 O3 on cytocompatibility, thermal and dissolution properties of P2 O5 -CaO-Na2 O-MgO-B2 O3 glass system, where P2 O5 content was fixed at 45 mol%. The effect of increasing Fe2 O3 from 3 to 5 mol% on P2 O5 -CaO-Na2 O-MgO glasses was also evaluated. The glass transition temperature, onset of crystallisation temperature and liquidus temperature were found to decrease with increasing Fe2 O3 content and the addition of B2 O3 , while the thermal expansion values were found to decrease...
January 2017: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29225769/fabrication-of-low-cost-micropatterned-polydimethyl-siloxane-scaffolds-to-organise-cells-in-a-variety-of-two-dimensioanl-biomimetic-arrangements-for-lab-on-chip-culture-platforms
#15
Lidia Escutia-Guadarrama, Genaro Vázquez-Victorio, David Martínez-Pastor, Brenda Nieto-Rivera, Marcela Sosa-Garrocho, Marina Macías-Silva, Mathieu Hautefeuille
We present the rapid-prototyping of type I collagen micropatterns on poly-dimethylsiloxane substrates for the biomimetic confinement of cells using the combination of a surface oxidation treatment and 3-aminopropyl triethoxysilane silanisation followed by glutaraldehyde crosslinking. The aim of surface treatment is to stabilise microcontact printing transfer of this natural extracellular matrix protein that usually wears out easily from poly-dimethylsiloxane, which is not suitable for biomimetic cell culture platforms and lab-on-chip applications...
January 2017: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29118967/cold-perfusion-decellularization-of-whole-organ-porcine-pancreas-supports-human-fetal-pancreatic-cell-attachment-and-expression-of-endocrine-and-exocrine-markers
#16
Erik Elebring, Vijay K Kuna, Niclas Kvarnström, Suchitra Sumitran-Holgersson
Despite progress in the field of decellularization and recellularization, the outcome for pancreas has not been adequate. This might be due to the challenging dual nature of pancreas with both endocrine and exocrine tissues. We aimed to develop a novel and efficient cold-perfusion method for decellularization of porcine pancreas and recellularize acellular scaffolds with human fetal pancreatic stem cells. Decellularization of whole porcine pancreas at 4°C with sodium deoxycholate, Triton X-100 and DNase efficiently removed cellular material, while preserving the extracellular matrix structure...
January 2017: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29081966/design-of-biomimetic-cellular-scaffolds-for-co-culture-system-and-their-application
#17
Yun-Min Kook, Yoon Jeong, Kangwon Lee, Won-Gun Koh
The extracellular matrix of most natural tissues comprises various types of cells, including fibroblasts, stem cells, and endothelial cells, which communicate with each other directly or indirectly to regulate matrix production and cell functionality. To engineer multicellular interactions in vitro, co-culture systems have achieved tremendous success achieving a more realistic microenvironment of in vivo metabolism than monoculture system in the past several decades. Recently, the fields of tissue engineering and regenerative medicine have primarily focused on three-dimensional co-culture systems using cellular scaffolds, because of their physical and biological relevance to the extracellular matrix of actual tissues...
January 2017: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29051810/controlled-dexamethasone-delivery-via-double-walled-microspheres-to-enhance-long-term-adipose-tissue-retention
#18
Arta Kelmendi-Doko, J Peter Rubin, Katarina Klett, Christopher Mahoney, Sheri Wang, Kacey G Marra
Current materials used for adipose tissue reconstruction have critical shortcomings such as suboptimal volume retention, donor-site morbidity, and poor biocompatibility. The aim of this study was to examine a controlled delivery system of dexamethasone to generate stable adipose tissue when mixed with disaggregated human fat in an athymic mouse model for 6 months. The hypothesis that the continued release of dexamethasone from polymeric microspheres would enhance both adipogenesis and angiogenesis more significantly when compared to the single-walled microsphere model, resulting in long-term adipose volume retention, was tested...
January 2017: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29051809/impact-of-expansion-and-redifferentiation-under-hypothermia-on-chondrogenic-capacity-of-cultured-human-septal-chondrocytes
#19
Achim von Bomhard, Joseph Faust, Alexander F Elsaesser, Silke Schwarz, Katharina Pippich, Nicole Rotter
A critical limitation in the cultivation of cartilage for tissue engineering is the dedifferentiation in chondrocytes, mainly during in vitro amplification. Despite many previous studies investigating the influence of various conditions, no data exist concerning the effects of hypothermia. Our aim has been to influence chondrocyte dedifferentiation in vitro by hypothermic conditions. Chondrocytes were isolated from cartilage biopsies and seeded in monolayer and in three-dimensional pellet-cultures. Each cell culture was either performed at 32...
January 2017: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/29051808/making-microenvironments-a-look-into-incorporating-macromolecular-crowding-into-in-vitro-experiments-to-generate-biomimetic-microenvironments-which-are-capable-of-directing-cell-function-for-tissue-engineering-applications
#20
Paula Benny, Michael Raghunath
Biomimetic microenvironments are key components to successful cell culture and tissue engineering in vitro. One of the most accurate biomimetic microenvironments is that made by the cells themselves. Cell-made microenvironments are most similar to the in vivo state as they are cell-specific and produced by the actual cells which reside in that specific microenvironment. However, cell-made microenvironments have been challenging to re-create in vitro due to the lack of extracellular matrix composition, volume and complexity which are required...
January 2017: Journal of Tissue Engineering
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