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Journal of Tissue Engineering and Regenerative Medicine

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https://www.readbyqxmd.com/read/27925441/anodized-3d-printed-titanium-implants-with-dual-micro-and-nano-scale-topography-promote-interaction-with-human-osteoblasts-and-osteocyte-like-cells
#1
Karan Gulati, Matthew Prideaux, Masakazu Kogawa, Luis Lima-Marques, Gerald J Atkins, David M Findlay, Dusan Losic
The success of implantation of materials into bone is governed by effective osseointegration, requiring biocompatibility of the material and the attachment and differentiation of osteoblastic cells. To enhance cellular function in response to the implant surface, micro- and nano-scale topography have been suggested as essential. In this study, we present bone implants based on 3D-printed titanium alloy (Ti6Al4V), with a unique dual topography composed of micron-sized spherical particles and vertically aligned titania nanotubes...
December 7, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27925440/enhancing-bioactive-properties-of-silk-fibroin-with-diatom-particles-for-bone-tissue-engineering-applications
#2
Thi Duy Hanh Le, Volha Liaudanskaya, Walter Bonani, Claudio Migliaresi, Antonella Motta
Many studies have highlighted the role of silicon in human bone formation and maintenance. Silicon, in fact, is considered to nucleate the precipitation of hydroxyapatite and to reduce the bone resorption. For this reason, we have combined silk fibroin with silicon releasing diatom particles, as potential material for bone tissue engineering applications. Sponges of fibroin loaded with different amounts and sizes of diatom particles were prepared by solvent casting-particulate leaching method, and their morphology, porosity and mechanical properties were evaluated...
December 7, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27921382/core-shell-silk-hydrogels-with-spatially-tuned-conformations-as-drug-delivery-system
#3
Le-Ping Yan, Joaquim M Oliveira, Ana L Oliveira, Rui L Reis
Hydrogels of spatially controlled physicochemical properties are appealing platforms for tissue engineering and drug delivery. In this study, core-shell silk fibroin (SF) hydrogels of spatially controlled conformation were developed. The core-shell structure in the hydrogels was formed by means of soaking the preformed (enzymatically crosslinked) random coil SF hydrogels in methanol. When increasing the methanol treatment time from 1 to 10 min, the thickness of the shell layer can be tuned from about 200 to about 850 μm as measured in wet status...
December 5, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27885807/loading-of-bmp2-related-peptide-onto-three-dimensional-nano-hydroxyapatite-scaffolds-accelerates-mineralization-in-critical-sized-cranial-bone-defects
#4
Tingfang Sun, Kui Zhou, Man Liu, Xiaodong Guo, Yanzhen Qu, Wei Cui, ZengWu Shao, Xianglin Zhang, Shuyun Xu
Extrusion free-forming, as a rapid prototyping technique, is extensively applied in fabricating ceramic material in bone tissue engineering. To improve the osteoinductivity of nano-hydroxyapatite (nHA) scaffold fabricated by extrusion free-forming, in this study, we incorporated a new peptide (P28) and optimized the superficial microstructure after shaping by controlling the sintering temperature. P28, a novel bone morphogenic protein 2 (BMP-2)-related peptide, was designed in this study. Analysis of the structure, physicochemical properties, and release kinetics of P28 from nHA sintered at temperatures ranging from 1000 °C to 1400 °C revealed that nHA sintered at 1000 °C had higher porosity, preferable pore size, and better capacity to control P28 release than that sintered at other temperatures...
November 25, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27882697/biomechanical-properties-of-an-implanted-engineered-tubular-gut-sphincter-complex
#5
Elie Zakhem, Mostafa El Bahrawy, Giuseppe Orlando, Khalil N Bitar
Neuromuscular diseases of the gut alter the normal motility patterns. Although surgical intervention remains the standard treatment, preservation of the sphincter attached to the rest of the gut is challenging. The present study aimed to evaluate a bioengineered gut-sphincter complex following its subcutaneous implantation for 4 weeks in rats. Engineered innervated human smooth muscle sheets and innervated human sphincters with a predefined alignment were placed around tubular scaffolds to create a gut-sphincter complex...
November 23, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27878977/silk-fibroin-scaffolds-with-muscle-like-elasticity-support-in-vitro-differentiation-of-human-skeletal-muscle-cells
#6
Vishal Chaturvedi, Deboki Naskar, Beverley F Kinnear, Elizabeth Grenik, Danielle E Dye, Miranda D Grounds, Subhas C Kundu, Deirdre R Coombe
Human adult skeletal muscle has a limited ability to regenerate after injury and therapeutic options for volumetric muscle loss are few. Technologies to enhance regeneration of tissues generally rely upon bioscaffolds to mimic aspects of the tissue extracellular matrix (ECM). In the present study, silk fibroins from four Lepidoptera (silkworm) species engineered into three-dimensional scaffolds were examined for their ability to support the differentiation of primary human skeletal muscle myoblasts. Human skeletal muscle myoblasts (HSMMs) adhered, spread and deposited extensive ECM on all the scaffolds, but immunofluorescence and quantitative polymerase chain reaction analysis of gene expression revealed that myotube formation occurred differently on the various scaffolds...
November 22, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27878968/proprotein-convertase-inhibition-promotes-ciliated-cell-differentiation-a-potential-mechanism-for-the-inhibition-of-notch1-signalling-by-decanoyl-rvkr-chloromethylketone
#7
Sang-Nam Lee, In-Suk Choi, Hyun Jun Kim, Eun Jin Yang, Hyun Jin Min, Joo-Heon Yoon
Chronic repetitive rounds of injury and repair in the airway lead to airway remodelling, including ciliated cell loss and mucous cell hyperplasia. Airway remodelling is mediated by many growth and differentiation factors including Notch1, which are proteolytically processed by proprotein convertases (PCs). The present study evaluated a novel approach for controlling basal cell-type determination based on the inhibition of PCs. It was found that decanoyl-RVKR-chloromethylketone (CMK), a PC inhibitor, promotes ciliated cell differentiation and has no effect on the ciliary beat frequency in air-liquid interface (ALI) cultures of human nasal epithelial cells (HNECs)...
November 22, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27860413/development-of-a-wearable-bioartificial-kidney-using-the-bioartificial-renal-epithelial-cell-system-brecs
#8
Kimberly A Johnston, Angela J Westover, Alvaro Rojas-Pena, Deborah A Buffington, Christopher J Pino, Peter L Smith, H David Humes
Cell therapy for the treatment of renal failure in the acute setting has proved successful, with therapeutic impact, yet development of a sustainable, portable bioartificial kidney for treatment of chronic renal failure has yet to be realized. Challenges in maintaining an anticoagulated blood circuit, the typical platform for solute clearance and support of the biological components, have posed a major hurdle in advancement of this technology. This group has developed a Bioartificial Renal Epithelial Cell System (BRECS) capable of differentiated renal cell function while sustained by body fluids other than blood...
November 18, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27860364/a-reproducible-method-for-the-isolation-and-expansion-of-ovine-mesenchymal-stromal-cells-from-bone-marrow-for-use-in-regenerative-medicine-preclinical-studies
#9
Marta Caminal, Roberto Vélez, Rosa Maria Rabanal, Daniel Vivas, Laura Batlle-Morera, Màrius Aguirre, Jordi Barquinero, Joan García, Joaquim Vives
The use of multipotent mesenchymal stromal cells (MSCs) as candidate medicines for treating a variety of pathologies is based on their qualities as either progenitors for the regeneration of damaged tissue or producers of a number of molecules with pharmacological properties. Preclinical product development programmes include the use of well characterized cell populations for proof of efficacy and safety studies before testing in humans. In the field of orthopaedics, an increasing number of translational studies use sheep as an in vivo test system because of the similarities with humans in size and musculoskeletal architecture...
November 18, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27860431/ureteral-reconstruction-with-reinforced-collagen-scaffolds-in-a-porcine-model
#10
Paul de Jonge, Vasileios Simaioforidis, Paul Geutjes, Egbert Oosterwijk, Wout Feitz
Repair of long ureteral defects often requires extensive surgical procedures and graft tissue which is associated with various complications, e.g. graft site morbidity or lack of suitable tissue. Tissue engineering might provide an alternative therapeutic approach in these cases. Reinforced tubular collagen-Vicryl scaffolds (l = 5 cm, lumen Ø = 6 mm, thickness = 3 mm) were developed with or without vascular endothelial growth factor and basic fibroblast growth factor and evaluated in a pre-clinical porcine model...
November 16, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27863093/potential-effect-of-mechano-growth-factor-e-domain-peptide-on-axonal-guidance-growth-in-primary-cultured-cortical-neurons-of-rats
#11
Meili Liu, Xufeng Niu, Gang Zhou, Zhengtai Jia, Ping Li, Yubo Fan
Establishing appropriate synaptic connections and plasticity is a critical need in neuronal regeneration and development. Mechano growth factor (MGF) and its C-terminal E-domain peptide with 24 amino acids, MGF-Ct24E, are potential neuroprotective agents. Our preliminary study indicates that Netrin-1 can guide axonal growth and its expression is sensitive to MGF, but how MGF regulates the expression of Netrin-1 and its receptor DCC is still unclear. Here, we investigate the effect of MGF-Ct24E on the expression of Netrin-1 and DCC in primary cultured cortical neurons in vitro and the adult rat brain in vivo...
November 15, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27863083/promotion-of-neurological-recovery-in-rat-spinal-cord-injury-by-mesenchymal-stem-cells-loaded-on-nerve-guided-collagen-scaffold-through-increasing-alternatively-activated-macrophage-polarization
#12
Zhan Peng, Wei Gao, Bing Yue, Jie Jiang, Yong Gu, Jianwu Dai, Liang Chen, Qin Shi
Mesenchymal stem cells(MSCs)characterized by multi-differentiation potent and immunoregulatory have been used in the treatment of spinal cord injury (SCI), but the direct transplantation may limit its effectiveness due to quick diffusion. In addition, the role of macrophages in healing is being increasingly recognized because of the ability to polarize into pro- and anti-inflammatory phenotypes. In the present study, we developed the nerve-guide collagen scaffold (CS) and rat MSCs. After CS was confirmed to minimize MSCs distribution in vivo by the positron emission tomography (PET) imaging, the repair capacity of combined implantation of CS and MSCs and the effect on classically activated macrophage (M1)/alternatively activated macrophage (M2) polarization was assessed in a hemisected SCI rat model...
November 15, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27863082/allogeneic-platelet-rich-plasma-affects-monocyte-differentiation-to-dendritic-cells-causing-an-anti-inflammatory-microenvironment-putatively-fostering-the-wound-healing
#13
Andrea Papait, Ranieri Cancedda, Maddalena Mastrogiacomo, Alessandro Poggi
Autologous platelet rich plasma (PRP) is clinically used to induce repair of different tissues through the release of bioactive molecules. In some patients, the production of an efficient autologous PRP is unfeasible due to their compromised health. We developed an allogeneic PRP mismatched for AB0 and Rh antigens. To broadcast its clinical applications avoiding side effects the outcome of allogeneic PRP on immune response should be defined. Thus, we investigated whether PRP affected the differentiation of peripheral blood monocytes to dendritic cells upon stimulation with granulocyte monocyte colony stimulating factor and interleukin-4...
November 15, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27863068/scaffold-free-tissue-engineering-of-functional-corneal-stromal-tissue
#14
Fatima N Syed-Picard, Yiqin Du, Andrew J Hertsenberg, Rachelle Palchesko, Martha L Funderburgh, Adam W Feinberg, James L Funderburgh
Blinding corneal scarring is predominately treated with allogeneic graft tissue, however, there is a worldwide shortage of donor tissue leaving millions in need of therapy. Human corneal stromal stem cells (CSSC) have been shown produce corneal tissue when cultured on nanofiber scaffolding, but this tissue cannot be readily separated from the scaffold. In this study, scaffold-free tissue engineering methods were used to generate biomimetic corneal stromal tissue constructs that can be transplanted in vivo without introducing the additional variables associated with exogenous scaffolding...
November 15, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27860439/chondrocytes-from-congenital-microtia-possess-an-inferior-capacity-for-in-vivo-cartilage-regeneration-to-healthy-ear-chondrocytes
#15
Yunpeng Gu, Ning Kang, Ping Dong, Xia Liu, Qian Wang, Xin Fu, Li Yan, Haiyue Jiang, Yilin Cao, Ran Xiao
No abstract text is available yet for this article.
November 15, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27860429/antibacterial-nanocomposite-bone-filler-based-on-silver-nanoparticles-and-polysaccharides
#16
Davide Porrelli, Andrea Travan, Turco Gianluca, Matteo Crosera, Borgogna Massimiliano, Ivan Donati, Sergio Paoletti, Gianpiero Adami, Eleonora Marsich
Injectable bone fillers represent an attractive strategy for the treatment of bone defects. These injectable materials should be biocompatible, capable of supporting cell growth and possibly able to exert antibacterial effects. In this work, nanocomposite microbeads based on alginate, chitlac, hydroxyapatite and silver nanoparticles were prepared and characterized. The dried microbeads displayed a rapid swelling in contact with simulated body fluid and maintained their integrity for more than 30 days. The evaluation of silver leakage from the microbeads showed that the antibacterial metal is slowly released in saline solution, with less than 6% of silver released after 1 week...
November 15, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27860426/human-corneal-fibroblast-migration-and-ecm-synthesis-during-stromal-repair-role-played-by-pdgf-bb-bfgf-and-tgf%C3%AE-1
#17
Patricia Gallego-Muñoz, Lucía Ibares-Frías, José A Garrote, María Cruz Valsero-Blanco, Roberto Cantalapiedra-Rodríguez, Jesús Merayo-Lloves, M Carmen Martínez-García
The development of treatments that modulate corneal wound healing to avoid fibrosis during tissue repair is important for the restoration of corneal transparency after an injury. To date, few studies have studied the influence of growth factors (GFs) on human corneal fibroblast (HCF) expression of extracellular matrix (ECM) proteins such as collagen types I and III, proteoglycans such as perlecan, or proteins implicated in cellular migration such as α5β1-integrin and syndecan-4. Using in vitro HCFs, we developed a mechanical wound model to study the influence of the GFs basic fibroblast growth factor (bFGF), platelet-derived growth factor (PDGF-BB), and transforming growth factor beta 1 (TGFβ1) on ECM protein production and cellular migration...
November 15, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27860377/local-application-of-lactoferrin-promotes-bone-regeneration-in-a-rat-critical-sized-calvarial-defect-model-as-demonstrated-by-micro-ct-and-histological-analysis
#18
Ryan Gao, Maureen Watson, Karen E Callon, Donna Tuari, Michael S Dray, Dorit Naot, Satya Amirapu, Jacob T Munro, Jillian Cornish, David S Musson
Lactoferrin is a multifunctional glycoprotein with therapeutic potential for bone tissue engineering. The aim of this study was to assess the efficacy of local application of lactoferrin on bone regeneration. Five-millimetre critical-sized defects were created over the right parietal bone in 64 Sprague-Dawley rats. The rats were randomized into four groups: group 1 (n = 20) had empty defects; group 2 (n = 20) had defects grafted with collagen gels (3 mg/mL); group 3 (n = 20) had defects grafted with collagen gels impregnated with bovine lactoferrin (10 µg/gel) and group 4 (n = 4) had sham surgeries (skin and periosteal incisions only)...
November 15, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27860335/development-of-a-synthetic-tissue-engineered-3d-printed-bioceramic-based-bone-graft-with-homogenously-distributed-osteoblasts-and-mineralizing-bone-matrix-in-vitro
#19
Doaa Adel-Khattab, Francesca Giacomini, Renate Gildenhaar, Georg Berger, Cynthia Gomes, Ulf Linow, Martin Hardt, Barbara Peleska, Jens Günster, Michael Stiller, Alireza Houshmand, Khaled Abdel Ghaffar, Ahmed Gamal, Mohamed El-Mofty, Christine Knabe
Over the last decade there have been increasing efforts to develop 3D scaffolds for bone tissue engineering from bioactive ceramics with 3D printing emerging as a promising technology. The overall objective of the present study was to generate a tissue engineered synthetic bone graft with homogenously distributed osteoblasts and mineralizing bone matrix in vitro, thereby mimicking the advantageous properties of autogenous bone grafts and facilitating usage for reconstructing segmental discontinuity defects in vivo...
November 15, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27863057/platelet-rich-plasma-based-bioactive-membrane-as-a-new-advanced-wound-care-tool
#20
Raffaele Spanò, Anita Muraglia, Maria R Todeschi, Marta Nardini, Paolo Strada, Ranieri Cancedda, Maddalena Mastrogiacomo
Chronic skin ulcers, consequence of diabetes and other pathological conditions, heavily compromise the patients' life quality and represent a high and constantly growing cost for National Health Services. Autologous Platelet Rich Plasma (PRP), has been proposed to treat these lesions. The absence of guidelines for the PRP production and the need of a fresh preparation for each treatment lead us to develop a protocol for the production of an allogenic PRP based bioactive membrane (BAM), standardized for platelet concentration and growth factor release...
November 13, 2016: Journal of Tissue Engineering and Regenerative Medicine
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