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https://www.readbyqxmd.com/read/28339553/de-and-recellularization-of-the-pig-uterus-a-bioengineering-pilot-study%C3%A2
#1
Hannes Campo, Pedro M Baptista, Nuria López-Pérez, Amparo Faus, Irene Cervelló, Carlos Simón
Absolute uterine factor infertility, or the absence of a functional uterus, has a prevalence of 3%-5% in the general population. Despite the great strides being made in reproductive medicine, patients diagnosed with absolute uterine factor infertility remain untreatable. The only available solution has been gestational surrogacy, but recently the Brannström group presented a viable alternative by reporting the first successful live birth after uterus transplantation. Similar to other transplantations, this approach has inherent limitations such as the paucity of donor organs and the need for long-term immunosuppression...
December 27, 2016: Biology of Reproduction
https://www.readbyqxmd.com/read/28338421/harnessing-the-osteogenicity-of-in-vitro-stem-cell-derived-mineralized-extracellular-matrix-as-3d-biotemplate-to-guide-bone-regeneration
#2
Yoke Chin Chai, Johanna Bolander, Ioannis Papantoniou, Jennifer Patterson, Jef Vleugels, Jan Schrooten, Frank P Luyten
Advanced biomaterials that are capable of guiding robust bone regeneration are highly demanded for translational therapy of bone defects or bone augmentation in clinics. One of the strategic approaches is to produce tissue engineering (TE) constructs that mediate bone regeneration by recapitulating the natural bone formation or healing process. In this study, we aimed at producing devitalized mineralized carriers with augmented bone forming capacity via a modified culture protocol (i.e., culture conditions with high calcium and/or phosphate concentrations) that first promotes cell growth and, subsequently, mineralized extracellular matrix (ECM) deposition by human periosteum-derived osteoprogenitor cells (hPDCs) on additive manufactured three-dimensional (3D) porous titanium (Ti)-based scaffolds...
March 24, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28337463/skin-tissue-engineering-application-of-adipose-derived-stem-cells
#3
REVIEW
Agnes S Klar, Jakub Zimoch, Thomas Biedermann
Perception of the adipose tissue has changed dramatically over the last few decades. Identification of adipose-derived stem cells (ASCs) ultimately transformed paradigm of this tissue from a passive energy depot into a promising stem cell source with properties of self-renewal and multipotential differentiation. As compared to bone marrow-derived stem cells (BMSCs), ASCs are more easily accessible and their isolation yields higher amount of stem cells. Therefore, the ASCs are of high interest for stem cell-based therapies and skin tissue engineering...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28335261/nanomaterials-for-cardiac-myocyte-tissue-engineering
#4
REVIEW
Rodolfo Amezcua, Ajay Shirolkar, Carolyn Fraze, David A Stout
Since their synthesizing introduction to the research community, nanomaterials have infiltrated almost every corner of science and engineering. Over the last decade, one such field has begun to look at using nanomaterials for beneficial applications in tissue engineering, specifically, cardiac tissue engineering. During a myocardial infarction, part of the cardiac muscle, or myocardium, is deprived of blood. Therefore, the lack of oxygen destroys cardiomyocytes, leaving dead tissue and possibly resulting in the development of arrhythmia, ventricular remodeling, and eventual heart failure...
July 19, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28332482/development-of-novel-silk-fibroin-polyvinyl-alcohol-sol-gel-bioactive-glass-composite-matrix-by-modified-layer-by-layer-electrospinning-method-for-bone-tissue-construct-generation
#5
B N Singh, K Pramanik
The worldwide occurrence of bone tissue related defects as well as diseases and lack of successful perpetual cure has attracted attention and accelerated exploration of composite scaffolding material with superior bioactivity, osteoinductivity and osteoconductivity properties. Among such biomaterials, silk fibroin and bioglass composite attained special emphasis to develop tissue engineered construct with a hierarchical structure ranging from nano to microscale thereby mimicking bone tissue extracellular matrix...
March 23, 2017: Biofabrication
https://www.readbyqxmd.com/read/28332479/3d-tissue-formation-by-stacking-detachable-cell-sheets-formed-on-nanofiber-mesh
#6
Min Sung Kim, Byungjun Lee, Hong Nam Kim, Seokyoung Bang, Hee Seok Yang, Seong Min Kang, Kahp-Yang Suh, Suk-Hee Park, Noo Li Jeon
We present a novel approach for assembling 3D tissue by layer-by-layer stacking of cell sheets formed on aligned nanofiber mesh. A rigid frame was used to repeatedly collect aligned electrospun PCL (polycaprolactone) nanofiber to form a mesh structure with average distance between fibers 6.4 µm. When human umbilical vein endothelial cells (HUVECs), human foreskin dermal fibroblasts, and skeletal muscle cells (C2C12) were cultured on the nanofiber mesh, they formed confluent monolayers and could be handled as continuous cell sheets with areas 3 × 3 cm(2) or larger...
March 23, 2017: Biofabrication
https://www.readbyqxmd.com/read/28332447/the-effect-of-native-silk-fibroin-powder-on-the-physical-properties-and-biocompatibility-of-biomedical-polyurethane-membrane
#7
Yan Zhuang, Qian Zhang, Jinqi Feng, Na Wang, Weilin Xu, Hongjun Yang
Naturally derived fibers such as silk fibroin can potentially enhance the biocompatibility of currently used biomaterials. This study investigated the physical properties of native silk fibroin powder and its effect on the biocompatibility of biomedical polyurethane. Native silk fibroin powder with an average diameter of 3 µm was prepared on a purpose-built machine. A simple method of phase inversion was used to produce biomedical polyurethane/native silk fibroin powder hybrid membranes at different blend ratios by immersing a biomedical polyurethane/native silk fibroin powder solution in deionized water at room temperature...
April 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28325151/adipose-tissue-derived-pericytes-for-cartilage-tissue-engineering
#8
Jin Xin Zhang, Chun Yan Du, Wei Min Guo, Pan Li, Shu Yun Liu, Zhi Guo Yuan, Jian Hua Yang, Xun Sun, He Yong Yin, Quan Yi Guo, Chen Fu Zhou
Mesenchymal stem cells (MSCs) represent a promising alternative source for cartilage tissue engineering. However, MSC culture is labor-intensive, so these cells cannot be applied immediately to regenerate cartilage for clinical purposes. Risks during the ex vivo expansion of MSCs, such as infection and immunogenicity, can be a bottleneck in their use in clinical tissue engineering. As a novel stem cell source, pericytes are generally considered to be the origin of MSCs. Pericytes do not have to undergo time-consuming ex vivo expansion because they are uncultured cells...
March 21, 2017: Current Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28324469/stem-cells-in-cardiovascular-medicine-the-road-to-regenerative-therapies
#9
REVIEW
Christopher W Anderson, Nicole Boardman, Jiesi Luo, Jinkyu Park, Yibing Qyang
PURPOSE OF REVIEW: The purpose of this review is to provide a broad overview of current trends in stem cell research and its applications in cardiovascular medicine. Researches on different stem cell sources, their inherent characteristics, and the limitations they have in medical applications are discussed. Additionally, uses of stem cells for both modeling and treating cardiovascular disease are discussed, taking note of the obstacles these engineered interventions must overcome to be clinically viable...
April 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28323411/engineering-an-injectable-muscle-specific-microenvironment-for-improved-cell-delivery-using-a-nanofibrous-extracellular-matrix-hydrogel
#10
Nikhil Rao, Gillie Agmon, Matthew T Tierney, Jessica L Ungerleider, Rebecca L Braden, Alessandra Sacco, Karen L Christman
Injection of skeletal muscle progenitors has the potential to be a minimally invasive treatment for a number of diseases that negatively affect vasculature and skeletal muscle, including peripheral artery disease (PAD). However, success with this approach has been limited because of poor transplant cell survival. This is primarily attributed to cell death due to extensional flow through the needle, the harsh ischemic environment of the host tissue, a deleterious immune cell response, and a lack of biophysical cues supporting exogenous cell viability...
March 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28322621/bladder-regeneration-using-multiple-scaffolds-with-growth-factors-in-a-bladder
#11
Luc A J Roelofs, Paul K J D de Jonge, Egbert Oosterwijk, Dorien M Tiemessen, Barbara B Kortmann, Robert P E de Gier, Elly M M Versteeg, Willeke F Daamen, Toin H van Kuppevelt, Paul J Geutjes, Wout Feitz
INTRODUCTION: Tissue engineering may become an alternative to current bladder augmentation techniques. Large scaffolds are needed for clinically significant augmentation, but can result in fibrosis and graft shrinkage. The purpose of this study was to investigate the use of multiple scaffolds instead of one large scaffold, to enhance bladder tissue regeneration and bladder capacity. Secondly, acellular collagen, collagen-heparin, and collagen-heparin scaffolds with growth factors were used and the biological activity of the different scaffolds was compared in a large animal model...
March 21, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28322510/rational-design-of-a-conductive-collagen-heart-patch
#12
Peter C Sherrell, Artur Cieślar-Pobuda, Malin Silverå Ejneby, Laura Sammalisto, Amy Gelmi, Ebo de Muinck, Johan Brask, Marek J Łos, Mehrdad Rafat
Cardiovascular diseases, including myocardial infarction, are the cause of significant morbidity and mortality globally. Tissue engineering is a key emerging treatment method for supporting and repairing the cardiac scar tissue caused by myocardial infarction. Creating cell supportive scaffolds that can be directly implanted on a myocardial infarct is an attractive solution. Hydrogels made of collagen are highly biocompatible materials that can be molded into a range of shapes suitable for cardiac patch applications...
March 21, 2017: Macromolecular Bioscience
https://www.readbyqxmd.com/read/28322040/design-and-fabrication-of-a-thin-walled-freeform-scaffold-on-the-basis-of-medical-image-data-and-a-3d-printed-template-potential-use-in-bile-duct-regeneration
#13
Suk Hee Park, Bo-Kyeong Kang, Ji Eun Lee, Seung Woo Chun, Kiseok Jang, Youn Hwan Kim, Mi Ae Jeong, Yohan Kim, Kyo Jin Kang, Nak Kyu Lee, Dongho Choi, Han Joon Kim
Three-dimensional (3D) printing, combined with medical imaging technologies, such as computed tomography (CT) and magnetic resonance imaging (MRI), has shown great potential in patient-specific tissue regeneration. Here, we successfully fabricated an ultrathin tubular freeform structure that has a wall thickness of several tens of micrometers and is capable of providing sufficient mechanical flexibility. Such a thin geometry cannot easily be achieved by 3D printing alone; therefore, it was realized through a serial combination of processes that included the 3D printing of a sacrificial template, the dip-coating of the biomaterial, and the removal of the inner template...
March 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28320452/compared-to-the-amniotic-membrane-wharton-s-jelly-may-be-a-more-suitable-source-of-mesenchymal-stem-cells-for-cardiovascular-tissue-engineering-and-clinical-regeneration
#14
Lei Pu, Mingyao Meng, Jian Wu, Jing Zhang, Zongliu Hou, Hui Gao, Hui Xu, Boyu Liu, Weiwei Tang, Lihong Jiang, Yaxiong Li
BACKGROUND: The success of developing cardiovascular tissue engineering (CTE) grafts greatly needs a readily available cell substitute for endothelial and interstitial cells. Perinatal annexes have been proposed as a valuable source of mesenchymal stem cells (MSCs) for tissue engineering and regenerative medicine. The objective of the present study is to evaluate the potential of human Wharton's jelly MSCs (WJ-MSCs) and amniotic membrane MSCs (AM-MSCs) as a seeding cell in CTE and cardiovascular regenerative medicine...
March 21, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28318376/advances-in-on-chip-vascularization
#15
Kristina Haase, Roger D Kamm
Microfluidics is invaluable for studying microvasculature, development of organ-on-chip models and engineering microtissues. Microfluidic design can cleverly control geometry, biochemical gradients and mechanical stimuli, such as shear and interstitial flow, to more closely mimic in vivo conditions. In vitro vascular networks are generated by two distinct approaches: via endothelial-lined patterned channels, or by self-assembled networks. Each system has its own benefits and is amenable to the study of angiogenesis, vasculogenesis and cancer metastasis...
March 20, 2017: Regenerative Medicine
https://www.readbyqxmd.com/read/28316275/central-growth-factor-loaded-depots-in-bone-tissue-engineering-scaffolds-for-enhanced-cell-attraction
#16
Mandy Quade, Sven Knaack, Ashwini Rahul Akkineni, Anastasia Gabrielyan, Anja Lode, Angela Roesen-Wolff, Michael Gelinsky
Tissue engineering, i.e. the application of stem and progenitor cells in combination with an engineered extracellular matrix, is a promising strategy for bone regeneration. However, its success is limited by the lack of vascularization after implantation. The concept of in situ tissue engineering envisages the recruitment of cells necessary for tissue regeneration from the host environment foregoing ex vivo cell seeding of the scaffold. In this study, we developed a novel scaffold system for enhanced cell attraction which is based on biomimetic mineralized collagen scaffolds equipped with a central biopolymer depot loaded with chemotactic agents...
March 19, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28316259/the-adipose-stromal-vascular-fraction-as-a-complex-cellular-source-for-tissue-engineering-applications
#17
Venkat M Ramakrishnan, Nolan L Boyd
A major challenge in tissue engineering is the generation of sufficient volumes of viable tissue for organ transplant. The development of a stable, mature vasculature is required to sustain the metabolic and functional activities of engineered tissues. Adipose stromal vascular fraction (SVF) cells are an easily accessible, heterogeneous cell system comprised of endothelial cells, macrophages, pericytes, and various stem cell populations. Collectively, SVF has been shown to spontaneously form vessel-like networks in vitro and robust, patent, and functional vasculatures in vivo...
March 19, 2017: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/28314377/the-effects-of-scaffold-remnants-in-decellularized-tissue-engineered-cardiovascular-constructs-on-the-recruitment-of-blood-cells
#18
Bart Sanders, Anita Driessen-Mol, Carlijn Bouten, Frank Baaijens
Decellularized tissue engineered heart valves (DTEHVs) showed remarkable results in translational animal models, leading to recellularization within hours after implantation. This is crucial to enable tissue remodeling. To investigate if the presence of scaffold remnants prior to implantation is responsible for the fast recellularization of DTEHVs, an in vitro mesofluidic system was used. Human granulocyte and agranulocyte fractions were isolated, stained, brought back in suspension, and implemented in the system...
March 17, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28303237/the-effect-of-biomechanical-stimulation-on-osteoblast-differentiation-of-human-jaw-periosteum-derived-stem-cells
#19
Ju-Min Lee, Min-Gu Kim, June-Ho Byun, Gyoo-Cheon Kim, Jung-Hoon Ro, Dae-Seok Hwang, Byul-Bora Choi, Geun-Chul Park, Uk-Kyu Kim
BACKGROUND: This study was to investigate the effect of biomechanical stimulation on osteoblast differentiation of human periosteal-derived stem cell using the newly developed bioreactor. METHODS: Human periosteal-derived stem cells were harvested from the mandible during the extraction of an impacted third molar. Using the new bioreactor, 4% cyclic equibiaxial tension force (0.5 Hz) was applied for 2 and 8 h on the stem cells and cultured for 3, 7, and 14 days on the osteogenic medium...
December 2017: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28303152/promising-therapeutic-strategies-for-mesenchymal-stem-cell-based-cardiovascular-regeneration-from-cell-priming-to-tissue-engineering
#20
REVIEW
Seung Taek Ji, Hyunyun Kim, Jisoo Yun, Joo Seop Chung, Sang-Mo Kwon
The primary cause of death among chronic diseases worldwide is ischemic cardiovascular diseases, such as stroke and myocardial infarction. Recent evidence indicates that adult stem cell therapies involving cardiovascular regeneration represent promising strategies to treat cardiovascular diseases. Owing to their immunomodulatory properties and vascular repair capabilities, mesenchymal stem cells (MSCs) are strong candidate therapeutic stem cells for use in cardiovascular regeneration. However, major limitations must be overcome, including their very low survival rate in ischemic lesion...
2017: Stem Cells International
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