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Tissue Engineering. Part A

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https://www.readbyqxmd.com/read/28699397/glioblastoma-exosomes-for-therapeutic-angiogenesis-in-peripheral-ischemia
#1
Anthony Monteforte, Brian Lam, Michael B Sherman, Kayla Henderson, Andrew Sligar, Adrianne Spencer, Brian Tang, Andrew Dunn, Aaron B Baker
Peripheral ischemia as a result of occlusive vascular disease is a widespread problem in patients over the age of 65. Angiogenic therapies that can induce microvascular growth have great potential for providing a long lasting solution for patients with ischemia and would provide and an appealing alternative to surgical and percutaneous interventions. However, many angiogenic therapies have seen poor efficacy in clinical trials, suggesting that patients with long term peripheral ischemia have considerable therapeutic resistance to angiogenic stimuli...
July 12, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28699387/low-laser-therapy-a-strategy-to-promote-the-osteogenic-differentiation-of-deciduous-dental-pulp-stem-cells-from-cleft-lip-and-palate-patients
#2
Carla Cristina Gomes Pinheiro, Milena Correa de Pinho, Ana Cecília Corrêa Aranha, Eduardo Fregnani, Daniela Franco Bueno
Dental pulp stem cells (DPSC) can undergo several types of differentiation, including osteogenic differentiation. One osteogenesis-inducing factor that has been previously described is "in vitro" low-level laser irradiation of cells. Laser irradiation promotes the acceleration of bone matrix mineralization of the cell strain. However, no consensus exists regarding the dose and treatment time. We used DPSC strains from cleft lip and palate patients because new bone tissue engineering strategies have used DPSC in preclinical and clinical trials for the rehabilitation of alveolar bone clefts...
July 12, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28562183/extracellular-matrices-for-bone-regeneration-a-literature-review
#3
Alaa Mansour, Mohamed Amine Mezour, Zahi Badran, Faleh Tamimi
The gold standard material for bone regeneration is still autologous bone, a mesenchymal tissue that consists mainly of extracellular matrix (ECM) (90% v/v) and little cellular content (10% v/v). However, the fact that decellularized allogenic bone grafts often present a clinical performance comparable to autologous bone grafts demonstrates the crucial role of ECM in bone regeneration. For long, the mechanism by which bone allografts function was not clear, but recent research has unveiled many unique characteristics of ECM that seem to play a key role in tissue regeneration...
July 12, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28486045/in-vitro-generated-intervertebral-discs-toward-engineering-tissue-integration
#4
Jonathan Iu, Eric Massicotte, Shu-Qiu Li, Mark B Hurtig, Ehsan Toyserkani, J Paul Santerre, Rita A Kandel
The intervertebral disc (IVD) is composed of nucleus pulposus (NP) surrounded by multilamellated annulus fibrosus (AF), and is located between the vertebral bodies. Current treatments for chronic neck or low back pain do not completely restore the functionality of degenerated IVDs. Thus, developing biological disc replacements is an approach of great interest. Given the complex structure of the IVD, tissue engineering of the individual IVD components and then combining them together may be the only way to achieve this...
July 11, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28437178/an-injectable-recombinant-collagen-i-peptide-based-macroporous-microcarrier-allows-superior-expansion-of-c2c12-and-human-bone-marrow-derived-mesenchymal-stromal-cells-and-supports-deposition-of-mineralized-matrix
#5
Davide Confalonieri, Margherita La Marca, Elisabeth Marianna Wilhelmina Maria van Dongen, Heike Walles, Franziska Ehlicke
The development of scaffold formulations based on extracellular matrix (ECM)-inspired synthetic materials constitutes an important resource for the advance of cell-based therapies in bone tissue engineering approaches, where both cell and scaffold implantation are often needed. Culturing cells on porous microcarriers (MCs) allows cell expansion in a three-dimensional microenvironment and constitutes a possible solution for minimally invasive cell and scaffold simultaneous delivery, but the reduced pore dimension and pore interconnection diameter of several commercially available MCs limits de facto cell ingrowth, and ultimately their suitability for in vivo cell delivery...
July 11, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28548630/tenogenic-differentiation-of-human-embryonic-stem-cells
#6
Tina P Dale, Shazia Mazher, William R Webb, Jing Zhou, Nicola Maffulli, Guo-Qiang Chen, Alicia J El Haj, Nicholas R Forsyth
Tendon healing is complex to manage because of the limited regeneration capacity of tendon tissue; stem cell-based tissue engineering approaches may provide alternative healing strategies. We sought to determine whether human embryonic stem cells (hESC) could be induced to differentiate into tendon-like cells by the addition of exogenous bone morphogenetic protein (BMP)12 (growth differentiation factor[GDF]7) and BMP13 (GDF6). hESC (SHEF-1) were maintained with or without BMP12/13 supplementation, or supplemented with BMP12/13 and the Smad signaling cascade blocking agent, dorsomorphin...
July 7, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28548569/thyroxine-increases-collagen-type-ii-expression-and-accumulation-in-scaffold-free-tissue-engineered-articular-cartilage
#7
G Adam Whitney, Thomas J Kean, Russell J Fernandes, Stephen Waldman, M Yat Tse, Stephen C Pang, Joseph M Mansour, James E Dennis
Low collagen accumulation in the extracellular matrix is a pressing problem in cartilage tissue engineering, leading to a low collagen-to-glycosaminoglycan (GAG) ratio and poor mechanical properties in neocartilage. Soluble factors have been shown to increase collagen content, but may result in a more pronounced increase in GAG content. Thyroid hormones have been reported to stimulate collagen and GAG production, but reported outcomes, including which specific collagen types are affected, are variable throughout the literature...
July 7, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28683690/using-costal-chondrocytes-to-engineer-articular-cartilage-with-applications-of-passive-axial-compression-and-bioactive-stimuli
#8
Le Huwe, Gurdeep Sullan, Jerry C Hu, Kyriacos A Athanasiou
Generating neocartilage with suitable mechanical integrity from a cell source that can circumvent chondrocyte scarcity is indispensable for articular cartilage regeneration strategies. Costal chondrocytes of the rib eliminate donor site morbidity in the articular joint, but it remains unclear how neocartilage formed from these cells responds to mechanical loading, especially if the intent is to use it in a load-bearing joint. In a series of three experiments, this study sought to determine efficacious parameters of passive axial compressive stimulation that would enable costal chondrocytes to synthesize mechanically robust cartilage...
July 6, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28683667/early-immunomodulatory-effects-of-implanted-human-perivascular-stromal-cells-during-bone-formation
#9
Carolyn A Meyers, Jiajia Xu, Lei Zhang, Greg Asatrian, Catherine Ding, Noah Yan, Kristen Broderick, Justin Sacks, Raghav Goyal, Xinli Zhang, Kang Ting, Bruno Péault, Chia Soo, Aaron W James
Human perivascular stem/stromal cells (PSC) are a multipotent mesodermal progenitor cell population defined by their perivascular residence. PSC are most commonly derived from subcutaneous adipose tissue, and recent studies have demonstrated the high potential for clinical translation of this fluorescence activated cell sorting (FACS) derived cell population for bone tissue engineering. Specifically, purified PSC induce greater bone formation than unpurified stroma taken from the same patient sample. Here, we examined the differences in early innate immune response to human PSC or unpurified stroma (stromal vascular fraction, SVF) during the in vivo process of bone formation...
July 6, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28683650/effect-of-cell-sheet-manipulation-techniques-on-the-expression-of-collagen-type-ii-and-stress-fiber-formation-in-human-chondrocyte-sheets
#10
Sopita Wongin, Saranatra Waikakul, Pojchong Chotiyarnwong, Wanwipa Siriwatwechakul, Kwanchanok Viravaidya-Pasuwat
Cell sheet technology is applied to human articular chondrocytes to construct a tissue-like structure as an alternative treatment for cartilage defect. The effect of a gelatin manipulator, as a cell sheet transfer system, on the quality of the chondrocyte sheets was investigated. The changes of important chondrogenic markers and stress fibers, resulting from the cell sheet manipulation, were also studied. The chondrocyte cell sheets were constructed with patient-derived chondrocytes using a temperature-responsive polymer, and a gelatin manipulator as a transfer carrier...
July 6, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28530130/injectable-graft-substitute-active-on-bone-tissue-regeneration
#11
Michela Bosetti, Alessia Borrone, Massimiliano Leigheb, V Prasad Shastri, Mario Cannas
With the aim to obtain an injectable bioactive scaffold that can accelerate bone formation in sinus lift augmentation, in bony void and fracture repair, we have developed a three-dimensional (3D) jelly collagen containing lysophosphatidic acid (LPA) and 1α,25-dihydroxyvitamin D3 (1,25D3). Using an in vitro 3D culture model of bone fracture, we show that the contraction of the collagen gel is mediated by Rho-kinase activation in osteoblasts. The gel contraction showed dependence on cell concentration and was increased by LPA, which favored apposition and fastening of bone fragments approach...
July 6, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28530157/muscle-secreted-factors-improve-anterior-cruciate-ligament-graft-healing-an-in-vitro-and-in-vivo-analysis
#12
Corina Adriana Ghebes, Nathalie Groen, Yau Chuk Cheuk, Sai Chuen Fu, Hugo Machado Fernandes, Daniel B F Saris
One of the ligaments most often damaged during sports-the anterior cruciate ligament (ACL)-has poor healing capacity. On damage, reconstructive surgery is performed to restore the mechanical stability of the knee and to reduce the inflammatory milieu otherwise present in the joint. A return to normal activities, however, takes between 9 and 12 months. Thus, strategies capable of improving ACL graft healing are needed. Embryonic development of tendon and ligament (T/L) is regulated by a crosstalk between different cell types...
July 5, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28562226/inhibition-of-pathological-phenotype-of-hypertrophic-scar-fibroblasts-via-coculture-with-adipose-derived-stem-cells
#13
Jingcheng Deng, Yuan Shi, Zhen Gao, Wenjie Zhang, Xiaoli Wu, Weigang Cao, Wei Liu
Hypertrophic scar (HS) is a dermal fibroproliferative disease characterized by fibroblast over-proliferation, overproduction, and deposition of the extracellular matrix. Growing evidence demonstrated that adipose-derived stem cells (ASCs) secrete a plethora of trophic and antifibrotic factors, which suppress inflammation and ameliorate fibrosis of different tissues. However, few studies investigate their effect on repressing HS activity. This study evaluated the suppressing effect of ASCs on HS fibroblast bioactivity and the possible mechanism via a coculture model...
July 3, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28580875/matrix-bound-nanovesicles-recapitulate-extracellular-matrix-effects-on-macrophage-phenotype
#14
Luai Huleihel, Joseph G Bartolacci, Jenna L Dziki, Tatiana Vorobyov, Brooke Arnold, Michelle E Scarritt, Catalina Pineda Molina, Samuel T LoPresti, Bryan N Brown, Stephen F Badylak
The early macrophage response to biomaterials has been shown to be a critical and predictive determinant of downstream outcomes. When properly prepared, bioscaffolds composed of mammalian extracellular matrix (ECM) have been shown to promote a transition in macrophage behavior from a proinflammatory to a regulatory/anti-inflammatory phenotype, which in turn has been associated with constructive and functional tissue repair. The mechanism by which ECM bioscaffolds promote this phenotypic transition, however, is poorly understood...
June 30, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28467734/structural-heteropolysaccharide-adhesion-to-the-glycocalyx-of-visceral-mesothelium
#15
Andrew B Servais, Arne Kienzle, Cristian D Valenzuela, Alexandra B Ysasi, Willi L Wagner, Akira Tsuda, Maximilian Ackermann, Steven J Mentzer
Bioadhesives are biopolymers with potential applications in wound healing, drug delivery, and tissue engineering. Pectin, a plant-based heteropolysaccharide, has recently demonstrated potential as a mucoadhesive in the gut. Since mucoadhesion is a process likely involving the interpenetration of the pectin polymer with mucin chains, we hypothesized that pectin may also be effective at targeting the glycocalyx of the visceral mesothelium. To explore the potential role of pectin as a mesothelial bioadhesive, we studied the interaction of various pectin formulations with the mesothelium of the lung, liver, bowel, and heart...
June 30, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28530164/biocompatibility-of-intensified-decellularized-equine-carotid-arteries-in-a-rat-subcutaneous-implantation-model-and-in-a-human-in-vitro-model
#16
Niklas Jeinsen, Lavinia Mägel, Danny Jonigk, Melanie Klingenberg, Axel Haverich, Mathias Wilhelmi, Ulrike Böer
Limited biocompatibility of decellularized scaffolds is an ongoing challenge in tissue engineering. We recently demonstrated that intensified detergent-based decellularization of equine carotid artery (dEACintens) removed residual cellular molecules from the scaffold more efficiently than a conventional decellularization (dEACcon), although this approach did not eliminate its immunogenicity entirely. CCN1 has been shown to improve biocompatibility of dEACcon in a sheep model. In this study, we tested the biocompatibility of dEACintens and dEACcon with or without CCN1 coating after subcutaneous implantation in rats for up to 12 weeks...
June 29, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28530131/a-combination-of-a-polycaprolactone-fumarate-scaffold-with-polyethylene-terephthalate-sutures-for-intra-articular-ligament-regeneration
#17
Joshua A Parry, Eric R Wagner, Peter L Kok, Mahrokh Dadsetan, Michael J Yaszemski, Andre J van Wijnen, Sanjeev Kakar
Intra-articular ligamentous injuries are typically unrepairable and have limited outcomes after graft reconstruction. A combination of porous polycaprolactone fumarate (PCLF) scaffolds with polyethylene terephthalate (PET) sutures was developed with the goal of regenerating intra-articular ligaments. Scaffolds were fabricated by injecting PCLF over three-dimensional-printed molds containing two strands of PET suture down its central pore followed by cross-linking. Scaffolds were seeded with human mesenchymal stem cells (MSCs) from adipose tissue...
June 29, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28537526/composite-biomaterial-as-a-carrier-for-bone-active-substances-for-metaphyseal-tibial-bone-defect-reconstruction-in-rats
#18
Peter Frederik Horstmann, Deepak Bushan Raina, Hanna Isaksson, Werner Hettwer, Lars Lidgren, Michael Mørk Petersen, Magnus Tägil
Restoring lost bone is a major challenge in orthopedic surgery. Currently available treatment strategies have shortcomings, such as risk of infection, nonunion, and excessive resorption. Our primary aim was to study if a commercially available gentamicin-containing composite calcium sulfate/hydroxyapatite biomaterial (GBM) could serve as a carrier for local delivery of bone morphogenic protein-2 (BMP-2) and zoledronic acid (ZA) in a tibia defect model in rats. Empty and allograft-filled defects were used as controls...
June 27, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28537482/programmed-platelet-derived-growth-factor-bb-and-bone-morphogenetic-protein-2-delivery-from-a-hybrid-calcium-phosphate-alginate-scaffold
#19
Emily A Bayer, Jahnelle Jordan, Abhijit Roy, Riccardo Gottardi, Morgan V Fedorchak, Prashant N Kumta, Steven R Little
Bone tissue engineering requires the upregulation of several regenerative stages, including a critical early phase of angiogenesis. Previous studies have suggested that a sequential delivery of platelet-derived growth factor (PDGF) to bone morphogenetic protein-2 (BMP-2) could promote angiogenic tubule formation when delivered to in vitro cocultures of human umbilical vein endothelial cells (HUVECs) and human mesenchymal stem cells (hMSCs). However, it was previously unclear that this PDGF to BMP-2 delivery schedule will result in cell migration into the scaffolding system and affect the later expression of bone markers...
June 27, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28649910/extracellular-vesicles-and-their-versatile-roles-in-tissue-engineering
#20
Steven M Jay, Gordana Vunjak-Novakovic
The importance of extracellular vesicles (EVs) - especially exosomes - in tissue engineering continues to increase due to their pivotal roles in intercellular signaling in a plethora of biological contexts, which informs both regenerative medicine approaches as well as modeling of disease (1, 2). In this Special Issue of Tissue Engineering Part A, entitled "Emerging Impact of Extracellular Vesicles on Tissue Engineering and Regeneration", we present novel research contributions from 8 different laboratories from around the world that accentuate the diverse nature of the impact of extracellular vesicles on the field...
June 24, 2017: Tissue Engineering. Part A
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