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Journal of Tissue Engineering and Regenerative Medicine

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https://www.readbyqxmd.com/read/29160940/morphological-transformation-of-hbmsc-from-2d-monolayer-to-3d-microtissue-on-low-crystallinity-sf-pcl-patch-with-promotion-of-cardiomyogenesis
#1
Hsin-Yu Lo, An-Li Huang, Pei-Chi Lee, Tze-Wen Chung, Shoei-Shen Wang
The effects of the stiffness of substrates on the cell behaviors of hBMSC have been investigated but the effects of the secondary structures of proteins in the substrates on the morphological transformation and differentiation of hBMSC have yet been elucidated. To investigate these issues, SP cardiac patches of poly(ε-caprolactone) (P), on which is grafted by silk (SF) with various β-sheet contents (or crystallinity) to provide various degrees of stiffness, were produced to examine the in-vitro behaviors of hBMSC during proliferation, and cardiomyogenesis on the SP patches...
November 21, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29139614/human-dental-stem-cell-derived-transgene-free-ipscs-generate-functional-neurons-via-embryoid-body-mediated-and-direct-induction-methods
#2
Ikbale El Ayachi, Jun Zhang, Xiao-Ying Zou, Zongdong Yu, Wei Wei, Kristen M S O'Connell, George T-J Huang
Induced pluripotent stem cells (iPSCs) give rise to neural stem/progenitor cells (NSCs), serving as a good source for neural regeneration. Here, we established transgene-free (TF) iPSCs from dental stem cells (DSCs) and determined their capacity to differentiate into functional neurons in vitro. Generated TF iPSCs from stem cells of apical papilla (SCAP) and dental pulp stem cells (DPSCs) underwent two methods -- embryoid body (EB)-mediated and direct induction, to guide TF-DSC iPSCs along with H9 or H9 Syn-GFP (human embryonic stem cells) into functional neurons in vitro...
November 15, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29139602/cell-yield-chondrogenic-potential-and-regenerated-cartilage-type-of-chondrocytes-derived-from-ear-nasoseptal-and-costal-cartilage
#3
Aijuan He, Huitang Xia, Kaiyan Xiao, Tingting Wang, Yu Liu, Jixin Xue, Dan Li, Shengjian Tang, Fangjun Liu, Xiaoyun Wang, Wenjie Zhang, Wei Liu, Yilin Cao, Guangdong Zhou
Functional reconstruction of large cartilage defects in subcutaneous sites remains clinically challenging because of limited donor cartilage. Tissue engineering is a promising and widely accepted strategy for cartilage regeneration. To date however, this strategy has not achieved a significant breakthrough in clinical translation owing to a lack of detailed pre-clinical data on cell yield and functionality of clinically applicable chondrocytes. To address this issue, the current study investigated the initial cell yield, proliferative potential, chondrogenic capacity, and regenerated cartilage-type of human chondrocytes derived from auricular (AU), nasoseptal (NS), and costal (CO) cartilage using a scaffold-free cartilage regeneration model (cartilage sheet)...
November 15, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29134783/electrospun-titania-fiber-mats-spin-coated-with-thin-polymer-films-as-nanofibrous-scaffolds-for-enhanced-cell-proliferation
#4
Alfin Kurniawan, Chintya Effendi, Meng-Jiy Wang
The incorporation of inorganic materials into electrospun nanofibers has recently gained considerable attention for the development of ECM-like scaffolds with improved mechanical properties and enhanced biological functions for tissue engineering applications. In this study, polymer-inorganic composite fibers consisting of poly(2-ethyl-2-oxazoline) (PEOXA) and tetrabutyl titanate (TBT) as the titanium precursor were successfully fabricated through a combined sol-gel/electrospinning approach. PEOXA/Ti(OR)n composite fibers were obtained with varying amounts of polymer and titanium precursors...
November 14, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29134773/design-and-biological-functionality-of-a-novel-hybrid-ti-6al-4v-hydrogel-system-for-reconstruction-of-bone-defects
#5
Alok Kumar, K C Nune, R D K Misra
We have designed a unique injectable bioactive hydrogel comprising of alginate, gelatin, and nanocrystalline hydroxyapatite and loaded with osteoblasts, with the ability to infiltrate into three-dimensional Ti-6Al-4V scaffolds with interconnected porous architecture, fabricated by electron beam melting (EBM). A two-step crosslinking process using the EDC/NHS and CaCl2 was adopted and found to be effective in the fabrication of cell-loaded hydrogel/Ti-6Al-4V scaffold system. This hybrid Ti-6Al-4V scaffold/hydrogel system was designed for the reconstruction of bone defects, which are difficult to heal in the absence of suitable support materials...
November 14, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29131527/3d-matrix-embedding-inhibits-cycloheximide-mediated-sensitization-to-tnf-alpha-induced-apoptosis-of-human-endothelial-cells
#6
Michael Saemisch, Markus Nickmann, Lisa Riesinger, Elazer R Edelman, Heiko Methe
The programmed form of cell death (apoptosis) is essential for normal development of multicellular organisms. Dysregulation of apoptosis has been linked with embryonal death and is involved in the pathophysiology of various diseases. Others and we previously demonstrated endothelial biology being intertwined with biochemical and structural composition of the subendothelial basement membrane. We now demonstrate that a three-dimensional growing environment significantly shields endothelial cells from cytokine-induced apoptosis...
November 13, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29131526/amniotic-mesenchymal-stem-cells-mitigate-osteoarthritis-progression-in-a-synovial-macrophage-mediated-in-vitro-explant-co-culture-model
#7
Natasha Topoluk, Kathleen Steckbeck, Sandra Siatkowski, Brian Burnikel, John Tokish, Jeremy Mercuri
Osteoarthritis (OA) is a disease of the synovial joint marked by chronic, low-grade inflammation leading to cartilage destruction. Regenerative medicine strategies for mitigating OA progression and/or promoting cartilage regeneration must be assessed using models that mimic the hallmarks of OA. More specifically, these models should maintain synovial macrophage phenotype in their native micro-environment. Herein, an in vitro co-culture model of patient-matched human OA cartilage and synovium was assessed for viability, macrophage phenotype, and progressive cartilage destruction in the presence of an inflammatory milieu...
November 13, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29115019/cell-laden-composite-suture-threads-for-repairing-damaged-tendons
#8
Raquel Costa-Almeida, Rui M A Domingues, Afsoon Fallahi, Huseyin Avci, Iman K Yazdi, Mohsen Akbari, Rui L Reis, Ali Tamayol, Manuela E Gomes, Ali Khademhosseini
Tendons have limited regenerative capacity due to their low cellularity and hypovascular nature, which results in poor clinical outcomes of presently used therapies. As tendon injuries are often observed in active adults, it poses an increasing socio-economic burden on healthcare systems. Currently, suture threads are used during surgical repair to anchor the tissue graft or to connect injured ends. Here, we created composite suture threads coated with a layer of cell-laden hydrogel that can be used for bridging the injured tissue aiming at tendon regeneration...
November 8, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29106037/mesenchymal-stem-cells-seeded-on-a-human-amniotic-membrane-improve-liver-regeneration-and-mouse-survival-after-extended-hepatectomy
#9
Aure Despeyroux, Cédric Duret, Claire Gondeau, Esther Perez-Gracia, Lisa Chuttoo, Hugues de Boussac, Philippe Briolotti, Claire Bony, Danièle Noël, Christian Jorgensen, Dominique Larrey, Martine Daujat-Chavanieu, Astrid Herrero
Liver failure remains the leading cause of postoperative mortality after hepatectomy. The present study investigated the effect of treatment with allogenic mesenchymal stem cells (MSCs) on survival and liver regeneration 48h and 7 days after 80% hepatectomy in C57Bl/6 mice. To optimize their biodistribution, MSCs were grown on acellular human amniotic membranes (HAM) and applied as a patch on the remnant liver. This approach was compared with MSC infusion and HAM patch alone. Hepatectomized mice without any treatment were used as control group...
November 6, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29105354/low-oxygen-conditions-promote-synergistic-increases-in-chondrogenesis-during-co-culture-of-human-osteoarthritic-stem-cells-and-chondrocytes
#10
Susan E Critchley, Rajalakshmanan Eswaramoorthy, Daniel J Kelly
There has been increased interest in co-cultures of stem cells and chondrocytes for cartilage tissue engineering as there are the limitations associated with using either cell type alone. Drawbacks associated with the use of chondrocytes include the limited numbers of cells available for isolation from damaged or diseased joints, their dedifferentiation during in vitro expansion and a diminished capacity to synthesise cartilage-specific extracellular matrix components with age and disease. This has motivated the use of adult stem cells with either freshly isolated or culture expanded chondrocytes for cartilage repair applications, however the ideal combination of cells and environmental conditions for promoting robust chondrogenesis remains unclear...
November 3, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29096406/hydrogel-composition-and-laser-micro-patterning-to-regulate-sciatic-nerve-regeneration
#11
Yulia Berkovitch, Talia Cohen, Eli Peled, Robert Schmidhammer, Hildner Florian, Andreas Teuschl, Susanne Wolbank, Dvir Yelin, Heinz Redl, Dror Seliktar
Treatment of peripheral nerve injuries has evolved over the past several decades to include the use of sophisticated new materials endowed with trophic and topographical cues that are essential for in vivo nerve fiber regeneration. In this research, we explored the use of an advanced design strategy for peripheral nerve repair, using biological and semi-synthetic hydrogels that enable controlled environmental stimuli to regenerate neurons and glial cells in a rat sciatic nerve resection model. The provisional nerve growth conduits were comprised of either natural fibrin, or adducts of synthetic polyethylene glycol (PEG) and fibrinogen or gelatin...
November 2, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29084373/residual-sodium-dodecyl-sulfate-in-decellularized-muscle-matrices-leads-to-fibroblast-activation-in-vitro-and-foreign-body-response-in-vivo
#12
Emily E Friedrich, Steven T Lanier, Soleil Niknam-Bienia, Gabriel A Arenas, Divya Rajendran, Jason A Wertheim, Robert D Galiano
Detergents such as sodium dodecyl sulfate (SDS) are commonly used to extract cells from tissues in a process called 'decellularization'. Residual SDS is difficult to completely remove and may lead to an undesirable host response toward an implanted biomaterial. In this study, we developed a modification for SDS cell extraction from muscle equally efficient to previous methods but leading to significantly less residual SDS remnants in the matrices. Muscle-derived matrices were prepared via two SDS-based decellularization methods, which led to removal of either 81...
October 30, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29084372/a-phase-i-ii-exploratory-clinical-trial-for-intracordal-injection-of-recombinant-hepatocyte-growth-factor-for-vocal-fold-scar-and-sulcus
#13
Shigeru Hirano, Atsuhiko Kawamoto, Ichiro Tateya, Masanobu Mizuta, Yo Kishimoto, Nao Hiwatashi, Yoshitaka Kawai, Takuya Tsuji, Ryo Suzuki, Mami Kaneko, Yasushi Naito, Tatsuo Kagimura, Tatsuo Nakamura, Shin-Ichi Kanemaru
BACKGROUND: Vocal fold scar and sulcus are intractable diseases with no effective established treatments. Hepatocyte growth factor (HGF) has preclinically proven to have potent anti-fibrotic and regenerative effects on vocal fold scar. The current phase I/II clinical trial aims to examine the safety and effectiveness of intracordal injection of a recombinant human HGF drug for patients with vocal fold scar or sulcus. STUDY DESIGN: Phase I/II, open-label, dose-escalating, first-in-human clinical trial...
October 30, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29076257/homeostasis-maintenance-of-encapsulated-cells
#14
Volha Liaudanskaya, Claudio Migliaresi, Antonella Motta
Cell niche homeostasis plays a critical role in many bodily functions including tissue functionality, stem cell maintenance and differentiation, wound healing, cancer development and propagation, and many others. Many tissue engineering approaches overlook the importance of engineered constructs homeostasis, in particular for transplantation purposes. Here we present a study of the effect of encapsulation duration on engineered tissue maturation and provide a protocol for the evaluation of critical conditions for transplantation purposes...
October 26, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29055138/effects-of-a-bone-graft-substitute-consisting-of-porous-gradient-ha-zro2-and-gelatin-chitosan-slow-release-hydrogel-containing-bmp-2-and-bmscs-on-lumbar-vertebral-defect-repair-in-rhesus-monkey
#15
Rong-Xue Shao, Ren-Fu Quan, Tuo Wang, Wei-Bin Du, Gao-Yong Jia, Dong Wang, Long-Bao Lv, Cai-Yin Xu, Xi-Cheng Wei, Jin-Fu Wang, Di-Sheng Yang
Dense biomaterial plays an important role in bone replacement. However, it fails to induce bone-cell migration into graft material. In the present study, a novel bone-graft substitute (BGS) consisting of porous gradient HA/ZrO2 composite (PGHC) and gelatin/chitosan slow-release hydrogel containing BMP-2 and BMSCs was designed and prepared to repair lumbar vertebral defects. The morphological characteristics of the BGS evaluated by scanning electron microscope showed that it had a three-dimensional network structure with uniformly distributed chitosan microspheres on the surfaces of the graft material and the interior of the pores...
October 21, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29052367/decellularized-caprine-liver-extracellular-matrix-as-a-2d-substrate-coating-and-3d-hydrogel-platform-for-vascularized-liver-tissue-engineering
#16
Tarun Agarwal, Rajan Narayan, Somnath Maji, Sudip Kumar Ghosh, Tapas Kumar Maiti
Development of a vascularized liver tissue construct is a need of an hour to circumvent the current demand of liver transplantation in healthcare sector. An appropriate matrix must support liver cell viability, functionality, and development of microvasculature. With this perspective, here, we report the use of decellularized Caprine liver ECM (CLECM) derived hydrogel for tissue engineering applications. First, CLECM was used as a substrate coating material for 2D hepatocyte culture. HepG2 cells cultured on CLECM coated surface showed higher albumin, urea, glycogen and GAGs synthesis in comparison to collagen coated surface (taken as control for the study)...
October 19, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29052350/platelet-lysate-activates-quiescent-cell-proliferation-and-reprogramming-in-human-articular-cartilage-involvement-of-hypoxia-inducible-factor-1
#17
Van Thi Nguyen, Ranieri Cancedda, Fiorella Descalzi
The idea of rescuing the body self-repair capability lost during evolution is progressively gaining ground in Regenerative Medicine. In particular, growth factors and bioactive molecules derived from activated platelets emerged as promising therapeutic agents acting as trigger for repair of tissue lesions and restoration of tissue functions. Aim of this study was to assess the potential of a Platelet Lysate (PL) for human articular cartilage repair considering its activity on progenitor cells and differentiated chondrocytes...
October 19, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29049870/dendrimers-breaking-the-paradigm-of-current-musculoskeletal-autoimmune-therapies
#18
REVIEW
Daniel B Rodrigues, Joaquim M Oliveira, Tírcia C Santos, Rui L Reis
The advances achieved by cell-based therapies to treat autoimmune diseases such as rheumatoid arthritis (RA) and multiple sclerosis (MS), despite promising, are still insufficient for the current demands. RA and MS therapeutic approaches follow world guidelines to use disease modifying drugs and biological agents which, regardless of some good results in clinical outcomes, are well known for several systemic secondary side effects. Dendrimers are custom-made nanoparticles with proved clinical potential, displaying proper size, chemistries, immunomodulatory and anti-inflammatory properties...
October 19, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29049869/collagen-vitrigels-with-low-fibril-density-enhance-human-embryonic-stem-cell-derived-retinal-pigment-epithelial-cell-maturation
#19
Xiaokun Wang, Julien Maruotti, Shoumyo Majumdar, Jose Roman, Hai-Quan Mao, Donald Zack, Jennifer Elisseeff
Structural and biochemical cues of extracellular matrix can substantially influence the differentiation and maturation of cultured retinal pigment epithelial cells (RPE). In this study, thin collagen vitrigels were engineered to create collagen nanofibrillar structures of different fibril densities in an effort to evaluate the maturation of human embryonic stem cell-derived retinal pigment epithelial cells (hESC-RPE). The ultrastructure of the different collagen vitrigels was characterized by transmission electron microscopy, and the mechanical properties was evaluated by tensile testing...
October 19, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29048773/use-of-a-rho-kinase-inhibitor-to-increase-human-tonsil-keratinocyte-longevity-for-three-dimensional-tissue-engineered-tonsil-epithelium-equivalents
#20
Amy K Grayson, Vanessa Hearnden, Robert Bolt, Ala Jebreel, Helen E Colley, Craig Murdoch
The generation of tissue-engineered epithelial models is often hampered by the limited proliferative capacity of primary epithelial cells. This study aimed to isolate normal tonsillar keratinocytes (NTK) from human tonsils, increase the lifespan of these cells using the Rho kinase inhibitor Y-27632 and to develop tissue-engineered equivalents of healthy and infected tonsil epithelium. The proliferation rate of isolated NTK and expression of c-MYC and p16INK4A were measured in the absence or presence of the inhibitor...
October 19, 2017: Journal of Tissue Engineering and Regenerative Medicine
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