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Decellularized matrix

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https://www.readbyqxmd.com/read/28078820/improvement-of-the-in-vivo-cellular-repopulation-of-decellularized-cardiovascular-tissues-by-a-detergent-free-non-proteolytic-actin-disassembling-regimen
#1
Alexander Assmann, Marc Struß, Franziska Schiffer, Friederike Heidelberg, Hiroshi Munakata, Elena V Timchenko, Pavel E Timchenko, Tim Kaufmann, Khon Huynh, Yukiharu Sugimura, Quentin Leidl, Antonio Pinto, Volker R Stoldt, Artur Lichtenberg, Payam Akhyari
Low immunogenicity and high repopulation capacity are crucial determinants for the functional and structural performance of acellular cardiovascular implants. The present study evaluates a detergent-free, non-proteolytic, actin-disassembling regimen (BIO) for decellularization of heart valve and vessel grafts, particularly focusing on their bio-functionality. Rat aortic conduits (rAoC; n = 89) and porcine aortic valve samples (n = 106) are decellularized using detergents (group DET) or the BIO regimen...
January 11, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28078077/a-novel-method-for-the-quantification-of-fatty-infiltration-in-skeletal-muscle
#2
Nicole K Biltz, Gretchen A Meyer
BACKGROUND: Fatty infiltration of the skeletal muscle is a common but poorly understood feature of many myopathies. It is best described in human muscle, where non-invasive imaging techniques and representative histology have been optimized to view and quantify infiltrating fat. However, human studies are limited in their ability to identify cellular and molecular mechanisms regulating fatty infiltration, a likely prerequisite to developing targeted interventions. As mechanistic investigations move to small animals, studies may benefit from new or adapted imaging tools optimized for high resolution and whole muscle quantification...
2017: Skeletal Muscle
https://www.readbyqxmd.com/read/28076902/decellularized-extracellular-matrix-of-human-umbilical-vein-endothelial-cells-promotes-endothelial-differentiation-of-stem-cells-from-exfoliated-deciduous-teeth
#3
Ting Gong, Boon Chin Heng, Jianguang Xu, Shaoyue Zhu, Changyong Yuan, Edward Chin Man Lo, Chengfei Zhang
Dental stem cells can serve as a potential source of functional endothelial cells (ECs) for tissue engineering applications, but the endothelial-lineage differentiation efficiency is rather low even with growth factors and mechanical stimuli, which greatly limits their clinical applications. This is partly due to the deficiency of standard two-dimensional (2-D) culture systems, which is unable to recapitulate the three-dimensional (3-D) in vivo milieu that is rich in extracellular matrix. Hence we extracted decellularized extracellular matrix from human umbilical vein endothelial cells (HUVECs-DECM) to provide a bioactive substratum conducive to the endothelial differentiation of dental stem cells...
January 11, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28073372/a-novel-method-for-the-quantification-of-fatty-infiltration-in-skeletal-muscle
#4
Nicole K Biltz, Gretchen A Meyer
BACKGROUND: Fatty infiltration of the skeletal muscle is a common but poorly understood feature of many myopathies. It is best described in human muscle, where non-invasive imaging techniques and representative histology have been optimized to view and quantify infiltrating fat. However, human studies are limited in their ability to identify cellular and molecular mechanisms regulating fatty infiltration, a likely prerequisite to developing targeted interventions. As mechanistic investigations move to small animals, studies may benefit from new or adapted imaging tools optimized for high resolution and whole muscle quantification...
January 10, 2017: Skeletal Muscle
https://www.readbyqxmd.com/read/28068287/extracellular-matrix-proteins-as-temporary-coating-for-thin-film-neural-implants
#5
Frederik Ceyssens, Marjolijn Deprez, Neill Turner, Dries Kil, Kris van Kuyck, Marleen Welkenhuysen, Bart Nuttin, Stephen Badylak, Robert Puers
OBJECTIVE: This study investigates the suitability of a thin sheet of extracellular matrix (ECM) proteins as a resorbable coating for temporarily reinforcing fragile or ultra-low stiffness thin-film neural implants to be placed on the brain, i.e. microelectrocorticographic (µECOG) implants. APPROACH: Thin-film polyimide-based electrode arrays were fabricated using lithographic methods. ECM was harvested from porcine tissue by a decellularization method and coated around the arrays...
January 9, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28062680/mitral-valve-replacement-using-a-handmade-construct-in-an-infant
#6
Steven Bibevski, Alexandra Levy, Frank G Scholl
We recently reported the feasibility of a handmade left atrioventricular valve using decellularized extracellular matrix for 3 months in a failed repair of AV canal defect. We present the use of an extracellular matrix mitral valve for 9 months in an infant with an un-repairable congenitally malformed valve. The valve functioned perfectly without anticoagulation until the patient expired from non-cardiac complications of their fibrillin gene defect. This report adds further experience using valves made from extracellular matrix in the systemic ventricle both in terms of application and in terms of short-term durability of the construct...
January 6, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28057483/the-bioink-a-comprehensive-review-on-bioprintable-materials
#7
REVIEW
Monika Hospodiuk, Madhuri Dey, Donna Sosnoski, Ibrahim T Ozbolat
This paper discusses "bioink", bioprintable materials used in three dimensional (3D) bioprinting processes, where cells and other biologics are deposited in a spatially controlled pattern to fabricate living tissues and organs. It presents the first comprehensive review of existing bioink types including hydrogels, cell aggregates, microcarriers and decellularized matrix components used in extrusion-, droplet- and laser-based bioprinting processes. A detailed comparison of these bioink materials is conducted in terms of supporting bioprinting modalities and bioprintability, cell viability and proliferation, biomimicry, resolution, affordability, scalability, practicality, mechanical and structural integrity, bioprinting and post-bioprinting maturation times, tissue fusion and formation post-implantation, degradation characteristics, commercial availability, immune-compatibility, and application areas...
January 2, 2017: Biotechnology Advances
https://www.readbyqxmd.com/read/28051180/human-heart-valve-derived-scaffold-improves-cardiac-repair-in-a-murine-model-of-myocardial-infarction
#8
Long Wan, Yao Chen, Zhenhua Wang, Weijun Wang, Sebastian Schmull, Jun Dong, Song Xue, Hans Imboden, Jun Li
Cardiac tissue engineering using biomaterials with or without combination of stem cell therapy offers a new option for repairing infarcted heart. However, the bioactivity of biomaterials remains to be optimized because currently available biomaterials do not mimic the biochemical components as well as the structural properties of native myocardial extracellular matrix. Here we hypothesized that human heart valve-derived scaffold (hHVS), as a clinically relevant novel biomaterial, may provide the proper microenvironment of native myocardial extracellular matrix for cardiac repair...
January 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28030865/recent-advances-in-decellularization-and-recellularization-for-tissue-engineered-liver-grafts
#9
Yujia Wang, Clara T Nicolas, Harvey S Chen, Jeffery J Ross, Silvana B De Lorenzo, Scott L Nyberg
Liver transplantation from deceased or living human donors remains the only proven option for patients with end-stage liver disease. However, the shortage of donor organs is a significant clinical concern that has led to the pursuit of tissue-engineered liver grafts generated from decellularized liver extracellular matrix and functional cells. Investigative efforts on optimizing both liver decellularization and recellularization protocols have been made in recent decades. In the current review, we briefly summarize these advances, including the generation of high-quality liver extracellular matrix scaffolds, evaluation criteria for quality control, modification of matrix for enhanced properties, and reseeding strategies...
December 29, 2016: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28027692/comparison-of-3d-printed-poly-%C3%AE%C2%B5-caprolactone-scaffolds-functionalized-with-tricalcium-phosphate-hydroxyapatite-bio-oss-or-decellularized-bone-matrix
#10
Ethan Nyberg, Alexandra Rindone, Amir Dorafshar, Warren L Grayson
3D-printing facilitates rapid, custom manufacturing of bone scaffolds with a wide range of material choices. Recent studies have demonstrated the potential for 3D-printing bioactive (i.e. osteo-inductive) scaffolds for use in bone regeneration applications. In this study, we 3D-printed porous poly-ϵ-caprolactone (PCL) scaffolds using a fused deposition modeling (FDM) process and functionalized them with mineral additives that have been widely used commercially and clinically: tricalcium phosphate (TCP), hydroxyapatite (HA), Bio-Oss (BO) or decellularized bone matrix (DCB)...
December 27, 2016: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28012154/mass-spectrometry-comparison-of-nerve-allograft-decellularization-processes
#11
Alonda C Pollins, Justine S Kim, Richard B Boyer, Wesley P Thayer
Peripheral nerve repair using nerve grafts has been investigated for several decades using traditional techniques such as histology, immunohistochemistry, and electron microscopy. Recent advances in mass spectrometry techniques have made it possible to study the proteomes of complex tissues, including extracellular matrix rich tissues similar to peripheral nerves. The present study comparatively assessed three previously described processing methods for generating acellular nerve grafts by mass spectrometry...
January 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28007548/enhanced-neuroprotection-with-decellularized-brain-extracellular-matrix-containing-bfgf-after-intracerebral-transplantation-in-parkinson-s-disease-rat-model
#12
Qian Lin, Ho Lun Wong, Fu-Rong Tian, Ya-Dong Huang, Jie Xu, Jing-Jing Yang, Pian-Pian Chen, Zi-Liang Fan, Cui-Tao Lu, Ying-Zheng Zhao
Extracellular matrix-based biomaterials have many advantages over synthetic polymer materials for regenerative medicine applications. In central nervous system (CNS), basic fibroblast growth factor (bFGF) is widely studied as a potential agent for Parkinson's disease (PD). However, the poor stability of bFGF hampered its clinical use. In this study, CNS-derived biologic scaffold containing bFGF was used to enhance and extend the neuroprotective effect of bFGF on PD targeted therapy. Decellularized brain extracellular matrix (dcBECM) was prepared by chemical extraction...
December 20, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28005380/hyaluronic-acid-hydroxyapatite-colloidal-gels-combined-with-micronized-native-ecm-as-potential-bone-defect-fillers
#13
S Connor Dennis, Jonathan Whitlow, Michael S Detamore, Sarah L Kieweg, Cory J Berkland
One of the grand challenges in translational regenerative medicine is the surgical placement of biomaterials. For bone regeneration in particular, malleable and injectable colloidal gelsare frequently designed to exhibit self-assembling and shear-response behavior which facilitates biomaterial placement in tissue defects. The current study demonstrated that by combining native extracellular matrix (ECM) microparticles, i.e., demineralized bone matrix (DBM) and decellularized cartilage (DCC), with hyaluronic acid (HA) and hydroxyapatite (HAP) nanoparticles, a viscoelastic colloidal gel consisting exclusively of natural materials was achieved...
December 22, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28005177/-new-approaches-to-ocular-surface-reconstruction-beyond-the-cornea
#14
K Spaniol, C Holtmann, G Geerling, S Schrader
BACKGROUND: Reconstruction of the conjunctiva is an essential part of ocular surface reconstruction. Clinically applied and experimentally tested tissue- and stem-cell-based approaches are presented and evaluated. MATERIALS AND METHODS: Current literature and our own results will be presented. RESULTS: Autologous conjunctiva, mucous membrane of the mouth or nose, and amniotic membrane are routinely used for conjunctival reconstruction. Limitations are limited availability, involvement in autoimmune diseases, donor heterogeneity, and degradation in an inflamed environment...
December 22, 2016: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/27999795/in-vivo-remodeling-of-fibroblast-derived-vascular-scaffolds-implanted-for-6-months-in-rats
#15
Maxime Y Tondreau, Véronique Laterreur, Karine Vallières, Robert Gauvin, Jean-Michel Bourget, Catherine Tremblay, Dan Lacroix, Lucie Germain, Jean Ruel, Francois A Auger
There is a clinical need for tissue-engineered small-diameter (<6 mm) vascular grafts since clinical applications are halted by the limited suitability of autologous or synthetic grafts. This study uses the self-assembly approach to produce a fibroblast-derived decellularized vascular scaffold (FDVS) that can be available off-the-shelf. Briefly, extracellular matrix scaffolds were produced using human dermal fibroblasts sheets rolled around a mandrel, maintained in culture to allow for the formation of cohesive and three-dimensional tubular constructs, and decellularized by immersion in deionized water...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27993639/the-impact-of-detergents-on-the-tissue-decellularization-process-a-tof-sims-study
#16
Lisa J White, Adam J Taylor, Denver M Faulk, Timothy J Keane, Lindsey T Saldin, Janet E Reing, Ilea T Swinehart, Neill J Turner, Buddy D Ratner, Stephen F Badylak
: Biologic scaffolds are derived from mammalian tissues, which must be decellularized to remove cellular antigens that would otherwise incite an adverse immune response. Although widely used clinically, the optimum balance between cell removal and the disruption of matrix architecture and surface ligand landscape remains a considerable challenge. Here we describe the use of time of flight secondary ion mass spectroscopy (ToF-SIMS) to provide sensitive, molecular specific, localized analysis of detergent decellularized biologic scaffolds...
December 16, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27989921/a-model-system-for-developing-a-tissue-engineered-meniscal-enthesis
#17
Mary Clare McCorry, Melissa M Mansfield, Xiaozhou Sha, Daniel J Coppola, Jonathan W Lee, Lawrence J Bonassar
The meniscus acts as a stabilizer, lubricator, and load distributer in the knee joint. The mechanical stability of the meniscus depends on its connection to the underlying bone by a fibrocartilage to bone transition zone called the meniscal enthesis. Tissue engineered menisci hold great promise as a treatment alternative however lack a means of integrated fixation to the underlying bone needed in order for a tissue engineered meniscal replacement to be successful. Tissue engineering the meniscal enthesis is a difficult task given the complex gradients of cell type, mineral, and extracellular matrix molecules...
October 28, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27989725/creation-of-an-injectable-in-situ-gelling-native-extracellular-matrix-for-nucleus-pulposus-tissue-engineering
#18
Rebecca A Wachs, Ella N Hoogenboezem, Hammad I Huda, Shangjing Xin, Stacy L Porvasnik, Christine E Schmidt
BACKGROUND CONTEXT: Disc degeneration is the leading cause of low back pain and is often characterized by a loss of disc height, resulting from cleavage of chondroitin sulfate proteoglycans (CSPGs) present in the nucleus pulposus. Intact CSPGs are critical to water retention and maintenance of the nucleus osmotic pressure. Decellularization of healthy nucleus pulposus tissue has the potential to serve as an ideal matrix for tissue engineering of the disc because of the presence of native disc proteins and CSPGs...
October 28, 2016: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/27988214/characterization-of-glomerular-extracellular-matrix%C3%A2-by-proteomic-analysis-of-laser-captured-microdissected-glomeruli
#19
Liliane Hobeika, Michelle T Barati, Dawn J Caster, Kenneth R McLeish, Michael L Merchant
Abnormal extracellular matrix (ECM) remodeling is a prominent feature of many glomerular diseases and is a final common pathway of glomerular injury. However, changes in ECM composition accompanying disease-related remodeling are unknown. The physical properties of ECM create challenges for characterization of composition using standard protein extraction techniques, as the insoluble components of ECM are frequently discarded and many ECM proteins are in low abundance compared to other cell proteins. Prior proteomic studies defining normal ECM composition used a large number of glomeruli isolated from human kidneys retrieved for transplantation or by nephrectomy for cancer...
February 2017: Kidney International
https://www.readbyqxmd.com/read/27981878/xenogeneic-decellularized-scaffold-a-novel-platform-for-ovary-regeneration
#20
Wen-Yue Liu, Shi-Gang Lin, Ru-Yi Zhuo, Yuan-Yuan Xie, Wei Pan, Xian-Feng Lin, Fei-Xia Shen
Women younger than 40 years may face early menopause because of premature ovarian failure (POF). The cause of POF can be idiopathic or iatrogenic, especially the cancer-induced oophorectomy and chemo- or radiation therapy. The current treatments, including hormone replacement therapy (HRT) and cryopreservation techniques, have increased risk of ovarian cancer and may reintroduce malignant cells after autografting. Decellularization technique has been regarded as a novel regenerative medicine strategy for organ replacement, wherein the living cells of an organ are removed, leaving the extracellular matrix (ECM) for cellular seeding...
January 10, 2017: Tissue Engineering. Part C, Methods
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