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Tissue Engineering. Part B, Reviews

Yoon Kim, Amin Tamadon, Seung-Yup Ku
In vitro culture of ovarian follicles is a promising bioengineering technique for preserving fecundity in reproductive age female by providing fertilizable oocytes. Successful clinical application should be preceded by developing the protocols that can efficiently overcome follicular cell apoptosis since the apoptosis is a critical phenomenon in in vivo folliculogenesis and in in vitro follicular maturation. Numerous pro-survival and anti-apoptotic molecules including follicular developmental regulators have been reported to be involved in the intra-ovarian apoptosis...
October 20, 2016: Tissue Engineering. Part B, Reviews
Vincent Ronfard, Alain Vertes, Michael May, Anne Dupraz, Mark van Dyke, Yves Bayon
"Evaluating the Past & Present of Regenerative Medicine (RM)" was the first part of an Industry Symposium dedicated to the subject during the 2015 World TERMIS Congress in Boston. This working session presented a critical review of the current RM landscape in Europe and North America with possible projections for the future. Interestingly, the RM development cycle seems to obey the Gartner hype cycle, now at the enlightenment phase, after past exaggerated expectations and discouragements, as suggested by increasing numbers of clinical trials and recent market approvals of RM solutions in both Europe (Glybera & Holoclar® from Chiesi Pharma and Strimvelis® from GSK) and Japan (Remestemcel-L from Mesoblast® )...
October 20, 2016: Tissue Engineering. Part B, Reviews
Fiona E Freeman, Laoise McNamara
Tissue engineering and regenerative medicine have significant potential to treat bone pathologies by exploiting the capacity for bone progenitors to grow and produce tissue constituents under specific biochemical and physical conditions. However, conventional tissue engineering approaches, which combine stem cells with biomaterial scaffolds, are limited as the constructs often degrade, due to a lack of vascularisation, and lack the mechanical integrity to fulfil loading bearing functions, and as such are not yet widely used for clinical treatment of large bone defects...
October 19, 2016: Tissue Engineering. Part B, Reviews
Fariba Ghorbani, Mansoureh Feizabadi, Roya Farzanegan, Esmaeil Vaziri, Saeed Samani, Seyedamirmohammad Lajevardi, Lida Moradi, Mohammad Behgam Shadmehr
The present study evaluated tracheal regeneration studies using scientometric and co-occurrence analysis in order to identify the most important topics and assess their trends over the time. In order to provide the adequate search options, PubMed, Scopus and Web of Science (WOS) were used to cover various categories such as keywords, countries, organizations, and authors. Search results were obtained by employing Bibexcel . Co-occurrence analysis was applied to evaluate the publications. Finally, scientific maps, author's network, and country contributions were depicted using VOSviewer and NetDraw...
October 19, 2016: Tissue Engineering. Part B, Reviews
Siddharth Shanbhag, Kamal Mustafa, Nikolaos Pandis, Jens R Nyengaard, Andreas Stavropoulos
The regenerative potential of tissue engineered bone constructs may be enhanced by in vitro co-culture and in vivo co-transplantation of vasculogenic and osteogenic (progenitor) cells. The objective of this study was to systematically review the literature to answer the focused question: in animal models, does co-transplantation of osteogenic and vasculogenic cells enhance bone regeneration in craniofacial defects, compared to solely osteogenic cell-seeded constructs? Following PRISMA guidelines, electronic databases were searched for controlled animal studies reporting co-transplantation of endothelial cells (EC) with mesenchymal stem cells (MSC) or osteoblasts (OB) in craniofacial critical-size bone defect (CSD) models...
October 12, 2016: Tissue Engineering. Part B, Reviews
Richard J Miron, Masako Fujioka-Kobayashi, Mark Bishara, Yufeng Zhang, Maria Hernandez, Joseph Choukroun
The growing multidisciplinary field of tissue engineering aims at predictably regenerating, enhancing, or replacing damaged or missing tissues for a variety of conditions caused by trauma, disease, and old age. One area of research that has gained tremendous awareness in recent years is that of platelet-rich fibrin (PRF), which has been utilized across a wide variety of medical fields for the regeneration of soft tissues. This systematic review gathered all the currently available in vitro, in vivo, and clinical literature utilizing PRF for soft tissue regeneration, augmentation, and/or wound healing...
October 10, 2016: Tissue Engineering. Part B, Reviews
Dorothée Girard, Betty Laverdet, Virginie Buhé, Marina Trouillas, Kamélia Ghazi, Maïa M Alexaline, Christophe Egles, Laurent Misery, Bernard Coulomb, Jean-Jacques Lataillade, François Berthod, Alexis Desmoulière
Many wound management protocols have been developed to improve wound healing after burn with the primordial aim to restore the barrier function of the skin and also provide a better esthetic outcome. Autologous skin grafts remain the gold standard in the treatment of skin burn, but this treatment has its limitation especially for patients presenting limited donor sites due to extensive burn areas. Deep burn injuries also alter the integrity of skin-sensitive innervation and have an impact on patient's quality of life by compromising perceptions of touch, temperature, and pain...
October 7, 2016: Tissue Engineering. Part B, Reviews
Grace Walden, Xin Liao, Simon Donell, Mike J Raxworthy, Graham P Riley, Aram Saeed
Tendon injury is common and debilitating, and it is associated with long-term pain and ineffective healing. It is estimated to afflict 25% of the adult population and is often a career-ending disease in athletes and racehorses. Tendon injury is associated with high morbidity, pain, and long-term suffering for the patient. Due to the low cellularity and vascularity of tendon tissue, once damage has occurred, the repair process is slow and inefficient, resulting in mechanically, structurally, and functionally inferior tissue...
September 30, 2016: Tissue Engineering. Part B, Reviews
Mariana I Neves, Marissa E Wechsler, Manuela E Gomes, Rui L Reis, Pedro L Granja, Nicholas A Peppas
The development of molecularly imprinted polymers (MIPs) using biocompatible production methods enables the possibility to further exploit this technology for biomedical applications. Tissue engineering (TE) approaches use the knowledge of the wound healing process to design scaffolds capable of modulating cell behavior and promote tissue regeneration. Biomacromolecules bear great interest for TE, together with the established recognition of the extracellular matrix, as an important source of signals to cells, both promoting cell-cell and cell-matrix interactions during the healing process...
August 2, 2016: Tissue Engineering. Part B, Reviews
Shantanu Pradhan, Iman Hassani, Jacob M Clary, Elizabeth A Lipke
Biomimetic polymers and materials have been widely used in tissue engineering for regeneration and replication of diverse types of both normal and diseased tissues. Cancer, being a prevalent disease throughout the world, has initiated substantial interest in the creation of tissue-engineered models for anticancer drug testing. The development of these in vitro three-dimensional (3D) culture models using novel biomaterials has facilitated the investigation of tumorigenic and associated biological phenomena with a higher degree of complexity and physiological context than that provided by established two-dimensional culture models...
July 29, 2016: Tissue Engineering. Part B, Reviews
Margot A Cousin, Alexandra J Greenberg, Tyler H Koep, Diana Angius, Michael J Yaszemski, Robert J Spinner, Anthony J Windebank
Little quantitative data exist concerning barriers that impede translation from bench to bedside. We systematically reviewed synthetic polymer nerve scaffolds for peripheral nerve repair to study a defined research area that is beyond the discovery phase and has potential for clinical application. Using electronic and manual search methods, we identified published English-language manuscripts where synthetic scaffolds were tested in preclinical animal models. A systematic review of these 416 reports estimated all costs related to use of animals, surgery, and evaluation methods...
July 28, 2016: Tissue Engineering. Part B, Reviews
Chiara Attanasio, Marcela T Latancia, Leo E Otterbein, Paolo A Netti
Recent advances in the fields of artificial organs and regenerative medicine are now joining forces in the areas of organ transplantation and bioengineering to solve continued challenges for patients with end-stage renal disease. The waiting lists for those needing a transplant continue to exceed demand. Dialysis, while effective, brings different challenges, including quality of life and susceptibility to infection. Unfortunately, the majority of research outputs are far from delivering satisfactory solutions...
August 2016: Tissue Engineering. Part B, Reviews
Bjarke Follin, Morten Juhl, Smadar Cohen, Anders Elm Perdersen, Jens Kastrup, Annette Ekblond
Mesenchymal stromal/stem cells (MSCs) have been investigated extensively through the past years, proving to have great clinical therapeutic potential. In vitro cultivation of MSCs in three-dimensional (3D) culture systems, such as scaffolds, hydrogels, or spheroids, have recently gained attention for tissue engineering applications. Studies on MSC spheroids demonstrated that such cultivation increased the paracrine immunomodulatory potential of the MSCs, accompanied by phenotypic alterations. In this review, we gather results from recent experimental studies on the immunomodulatory abilities of MSCs when cultured as spheroids or in biomaterials like scaffolds or hydrogels compared to regular two-dimensional (2D) culture and show that alterations occurring to MSCs in spheroids also occur in MSCs in biomaterials...
August 2016: Tissue Engineering. Part B, Reviews
Nick A Sears, Dhruv R Seshadri, Prachi S Dhavalikar, Elizabeth Cosgriff-Hernandez
Recent advances in three-dimensional (3D) printing technologies have led to a rapid expansion of applications from the creation of anatomical training models for complex surgical procedures to the printing of tissue engineering constructs. In addition to achieving the macroscale geometry of organs and tissues, a print layer thickness as small as 20 μm allows for reproduction of the microarchitectures of bone and other tissues. Techniques with even higher precision are currently being investigated to enable reproduction of smaller tissue features such as hepatic lobules...
August 2016: Tissue Engineering. Part B, Reviews
Aaron W James, Gregory LaChaud, Jia Shen, Greg Asatrian, Vi Nguyen, Xinli Zhang, Kang Ting, Chia Soo
Bone morphogenetic protein-2 (BMP-2) is currently the only Food and Drug Administration (FDA)-approved osteoinductive growth factor used as a bone graft substitute. However, with increasing clinical use of BMP-2, a growing and well-documented side effect profile has emerged. This includes postoperative inflammation and associated adverse effects, ectopic bone formation, osteoclast-mediated bone resorption, and inappropriate adipogenesis. Several large-scale studies have confirmed the relative frequency of adverse events associated with the clinical use of BMP-2, including life-threatening cervical spine swelling...
August 2016: Tissue Engineering. Part B, Reviews
Anne M Leferink, Clemens A van Blitterswijk, Lorenzo Moroni
In the field of tissue engineering, there is a need for methods that allow assessing the performance of tissue-engineered constructs noninvasively in vitro and in vivo. To date, histological analysis is the golden standard to retrieve information on tissue growth, cellular distribution, and cell fate on tissue-engineered constructs after in vitro cell culture or on explanted specimens after in vivo applications. Yet, many advances have been made to optimize imaging techniques for monitoring tissue-engineered constructs with a sub-mm or μm resolution...
August 2016: Tissue Engineering. Part B, Reviews
Cheri X Deng, Xiaowei Hong, Jan P Stegemann
Ultrasound techniques are increasingly being used to quantitatively characterize both native and engineered tissues. This review provides an overview and selected examples of the main techniques used in these applications. Grayscale imaging has been used to characterize extracellular matrix deposition, and quantitative ultrasound imaging based on the integrated backscatter coefficient has been applied to estimating cell concentrations and matrix morphology in tissue engineering. Spectral analysis has been employed to characterize the concentration and spatial distribution of mineral particles in a construct, as well as to monitor mineral deposition by cells over time...
August 2016: Tissue Engineering. Part B, Reviews
Yun Xiao, Samad Ahadian, Milica Radisic
Progress in biomaterials science and engineering and increasing knowledge in cell biology have enabled us to develop functional biomaterials providing appropriate biochemical and biophysical cues for tissue regeneration applications. Tissue regeneration is particularly important to treat chronic wounds of people with diabetes. Understanding and controlling the cellular microenvironment of the wound tissue are important to improve the wound healing process. Here, we review different biochemical (e.g., growth factors, peptides, DNA, and RNA) and biophysical (e...
July 13, 2016: Tissue Engineering. Part B, Reviews
Qingqing Wu, Bo Yang, Kevin Hu, Cong Cao, Yi Man, Ping Wang
Induced pluripotent stem cells (iPSCs), reprogrammed from adult somatic cells using defined transcription factors, are regarded as a promising cell source for tissue engineering. For the purpose of bone tissue regeneration, efficient in vitro differentiation of iPSCs into downstream cells, such as mesenchymal stem cells (MSCs), osteoblasts or osteocyte-like cells, prior to use is necessary to limit undesired tumorogenesis associated with the pluripotency of iPSCs. Until recently numerous techniques on the production of iPSC-derived osteogenic progenitors have been introduced...
July 8, 2016: Tissue Engineering. Part B, Reviews
Josue Chery, Joshua Wong, Shan Huang, Shuyun Wang, Ming-Sing Si
Hypoplastic left heart syndrome (HLHS), the most severe and common form of single ventricle congenital heart lesions, is characterized by hypoplasia of the mitral valve, left ventricle (LV), and all LV outflow structures. While advances in surgical technique and medical management have allowed survival into adulthood, HLHS patients have severe morbidities, decreased quality of life, and a shortened lifespan. The single right ventricle (RV) is especially prone to early failure because of its vulnerability to chronic pressure overload, a mode of failure distinct from ischemic cardiomyopathy encountered in acquired heart disease...
June 28, 2016: Tissue Engineering. Part B, Reviews
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