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tissue engineered blood vessel

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https://www.readbyqxmd.com/read/27906688/layer-by-layer-approach-for-a-uniformed-fabrication-of-a-cell-patterned-vessel-like-construct
#1
Camila A Wilkens, Christopher J Rivet, Tamara L Akentjew, Julian Alverio, Maroun Khoury, Juan Pablo Acevedo
Successful tissue engineered small diameter blood vessels (SDBV) require manufacturing systems capable of precisely controlling different key elements, such as material composition, geometry and spatial location of specialized biomaterials and cells types. We report in this work an automated methodology that enables the manufacture of multilayer cylindrical constructs for SDBV fabrication that uses a layer-by-layer deposition approach while controlling variables such as dipping and spinning speed of a rod and biomaterial viscosity...
December 1, 2016: Biofabrication
https://www.readbyqxmd.com/read/27889329/perivascular-cells-and-tissue-engineering-current-applications-and-untapped-potential
#2
REVIEW
Elisa Avolio, Valeria V Alvino, Mohamed T Ghorbel, Paola Campagnolo
The recent development of tissue engineering provides exciting new perspectives for the replacement of failing organs and the repair of damaged tissues. Perivascular cells, including vascular smooth muscle cells, pericytes and other tissue specific populations residing around blood vessels, have been isolated from many organs and are known to participate to the in situ repair process and angiogenesis. Their potential has been harnessed for cell therapy of numerous pathologies; however, in this Review we will discuss the potential of perivascular cells in the development of tissue engineering solutions for healthcare...
November 23, 2016: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/27885900/recreating-composition-structure-functionalities-of-tissues-at-nanoscale-for-regenerative-medicine
#3
Emine Alarçin, Xiaofei Guan, Sara Saheb Kashaf, Khairat Elbaradie, Huazhe Yang, Hae Lin Jang, Ali Khademhosseini
Nanotechnology offers significant potential in regenerative medicine, specifically with the ability to mimic tissue architecture at the nanoscale. In this perspective, we highlight key achievements in the nanotechnology field for successfully mimicking the composition and structure of different tissues, and the development of bio-inspired nanotechnologies and functional nanomaterials to improve tissue regeneration. Numerous nanomaterials fabricated by electrospinning, nanolithography and self-assembly have been successfully applied to regenerate bone, cartilage, muscle, blood vessel, heart and bladder tissue...
December 2016: Regenerative Medicine
https://www.readbyqxmd.com/read/27876017/increased-wnt5a-in-squamous-cell-lung-carcinoma-inhibits-endothelial-cell-motility
#4
J Rapp, E Kiss, M Meggyes, E Szabo-Meleg, D Feller, G Smuk, T Laszlo, V Sarosi, T F Molnar, K Kvell, J E Pongracz
BACKGROUND: Angiogenesis is important both in normal tissue function and disease and represents a key target in lung cancer (LC) therapy. Unfortunately, the two main subtypes of non-small-cell lung cancers (NSCLC) namely, adenocarcinoma (AC) and squamous cell carcinoma (SCC) respond differently to anti-angiogenic e.g. anti-vascular endothelial growth factor (VEGF)-A treatment with life-threatening side effects, often pulmonary hemorrhage in SCC. The mechanisms behind such adverse reactions are still largely unknown, although peroxisome proliferator activator receptor (PPAR) gamma as well as Wnt-s have been named as molecular regulators of the process...
November 23, 2016: BMC Cancer
https://www.readbyqxmd.com/read/27845938/elastin-like-recombinamers-multilayered-nanofibrous-scaffolds-for-cardiovascular-applications
#5
M Putzu, F Causa, V Nele, I González de Torre, J C Rodriguez-Cabello, P A Netti
Coronary angioplasty is the most widely used technique for removing atherosclerotic plaques in blood vessels. The regeneration of the damaged intima layer after this treatment is still one of the major challenges in the field of cardiovascular tissue engineering. Different polymers have been used in scaffold manufacturing in order to improve tissue regeneration. Elastin-mimetic polymers are a new class of molecules that have been synthesized and used to obtain small diameter fibers with specific morphological characteristics...
November 15, 2016: Biofabrication
https://www.readbyqxmd.com/read/27834123/translational-applications-of-tissue-engineering-in-cardiovascular-medicine
#6
Y Murat Elçin, Arin Dogan, Eser Elçin
Cardiovascular diseases are the leading cause of worldwide deaths. Current paradigm in medicine seeks novel approaches for the treatment of progressive or end-stage diseases. The organ transplantation option is limited in availability and unfortunately, a great number of patients are lost while waiting for donor organs. Animal studies have shown that upon myocardial infarction, it may be possible to stop adverse remodeling in its tracks and reverse with tissue engineering methods. Regaining the myocardium function and avoiding further deterioration towards heart failure can benefit millions of people with a significantly lesser burden on healthcare systems worldwide...
November 11, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27821306/intrafibrillar-silicified-collagen-scaffold-modulates-monocyte-to-promote-cell-homing-angiogenesis-and-bone-regeneration
#7
Jin-Long Sun, Kai Jiao, Li-Na Niu, Yang Jiao, Qun Song, Li-Juan Shen, Franklin R Tay, Ji-Hua Chen
The immunomodulatory functions of monocytes are increasingly being recognized. Silicified collagen scaffolds (SCSs), produced by infiltrating collagen matrices with intrafibrillar amorphous silica, exhibit osteogenic and angiogenic potential and are promising candidates in tissue engineering. Here, we demonstrate that SCS promotes in situ bone regeneration and angiogenesis via monocyte immunomodulation. Increased numbers of TRAP-positive monocytes, nestin-positive bone marrow stromal cells (BMSCs) and CD31-positive and endomucin-positive new vessels can be identified from new bone formation regions in a murine calvarial defect model...
October 31, 2016: Biomaterials
https://www.readbyqxmd.com/read/27810640/skeletal-muscle-derived-stem-cells-microintegrated-into-a-biodegradable-elastomer-for-reconstruction-of-the-abdominal-wall
#8
Keisuke Takanari, Ryotaro Hashizume, Yi Hong, Nicholas J Amoroso, Tomo Yoshizumi, Burhan Gharaibeh, Osamu Yoshida, Kazuhiro Nonaka, Hideyoshi Sato, Johnny Huard, William R Wagner
A variety of techniques have been applied to generate tissue engineered constructs, where cells are combined with degradable scaffolds followed by a period of in vitro culture or direct implantation. In the current study, a cellularized scaffold was generated by concurrent deposition of electrospun biodegradable elastomer (poly(ester urethane)urea, PEUU) and electrosprayed culture medium + skeletal muscle-derived stem cells (MDSCs) or electrosprayed culture medium alone as a control. MDSCs were obtained from green fluorescent protein (GFP) transgenic rats...
October 18, 2016: Biomaterials
https://www.readbyqxmd.com/read/27792286/an-integrated-theoretical-experimental-approach-to-accelerate-translational-tissue-engineering
#9
Rachel H Coy, Owen R Evans, James B Phillips, Rebecca J Shipley
Implantable devices utilizing bioengineered tissue are increasingly showing promise as viable clinical solutions. The design of bioengineered constructs is currently directed according to the results of experiments which are used to test a wide range of different combinations and spatial arrangements of biomaterials, cells and chemical factors. There is an outstanding need to accelerate the design process and reduce financial costs, whilst minimizing the required number of animal-based experiments. These aims could be achieved through the incorporation of mathematical modelling as a preliminary design tool...
October 28, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27778466/a-double-chamber-rotating-bioreactor-for-enhanced-tubular-tissue-generation-from-human-mesenchymal-stem-cells
#10
I Stefani, M A Asnaghi, J J Cooper-White, S Mantero
Cardiovascular diseases represent a major global health burden, with high rates of mortality and morbidity. Autologous grafts are commonly used to replace damaged or failing blood vessels, however such approaches are hampered by the scarcity of suitable graft tissue, donor site morbidity and poor long-term stability. Tissue engineering has been investigated as a means by which exogenous vessel grafts can be produced, with varying levels of success to date, a result of mismatched mechanical properties of these vessel substitutes and inadequate ex vivo vessel tissue genesis...
October 24, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27772729/low-temperature-deposition-manufacturing-a-novel-and-promising-rapid-prototyping-technology-for-the-fabrication-of-tissue-engineered-scaffold
#11
Wei Liu, Daming Wang, Jianghong Huang, You Wei, Jianyi Xiong, Weimin Zhu, Li Duan, Jielin Chen, Rong Sun, Daping Wang
Developed in recent years, low-temperature deposition manufacturing (LDM) represents one of the most promising rapid prototyping technologies. It is not only based on rapid deposition manufacturing process but also combined with phase separation process. Besides the controlled macropore size, tissue-engineered scaffold fabricated by LDM has inter-connected micropores in the deposited lines. More importantly, it is a green manufacturing process that involves non-heating liquefying of materials. It has been employed to fabricate tissue-engineered scaffolds for bone, cartilage, blood vessel and nerve tissue regenerations...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27767020/nanocomposite-scaffolds-with-tunable-mechanical-and-degradation-capabilities-co-delivery-of-bioactive-agents-for-bone-tissue-engineering
#12
Juan P Cattalini, Judith Roether, Alexander Hoppe, Fatemeh Pishbin, Luis Haro Durand, Alejandro Gorustovich, Aldo R Boccaccini, Silvia Lucangioli, Viviana Mouriño
Novel multifunctional nanocomposite scaffolds made of nanobioactive glass and alginate crosslinked with therapeutic ions such as calcium and copper were developed for delivering therapeutic agents, in a highly controlled and sustainable manner, for bone tissue engineering. Alendronate, a well-known antiresorptive agent, was formulated into microspheres under optimized conditions and effectively loaded within the novel multifunctional scaffolds with a high encapsulation percentage. The size of the cation used for the alginate crosslinking impacted directly on porosity and viscoelastic properties, and thus, on the degradation rate and the release profile of copper, calcium and alendronate...
October 21, 2016: Biomedical Materials
https://www.readbyqxmd.com/read/27721833/slowly-delivered-icariin-allogeneic-bone-marrow-derived-mesenchymal-stem-cells-to-promote-the-healing-of-calvarial-critical-size-bone-defects
#13
Tianlin Liu, Xin Zhang, Yuan Luo, Yuanliang Huang, Gang Wu
Bone tissue engineering technique is a promising strategy to repair large-volume bone defects. In this study, we developed a 3-dimensional construct by combining icariin (a small-molecule Chinese medicine), allogeneic bone marrow-derived mesenchymal stem cells (BMSCs), and a siliceous mesostructured cellular foams-poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (SMC-PHBHHx) composite scaffold. We hypothesized that the slowly released icariin could significantly promote the efficacy of SMC-PHBHHx/allogeneic BMSCs for repairing critical-size bone defects in rats...
2016: Stem Cells International
https://www.readbyqxmd.com/read/27718530/anti-angiogenic-potential-of-vegf-blocker-dendron-laden-gellan-gum-hydrogels-for-tissue-engineering-applications
#14
Valeria Perugini, Anna L Guildford, Joana Silva-Correia, Joaquim M Oliveira, Steven T Meikle, Rui L Reis, Matteo Santin
Damage of non-vascularised tissues such as cartilage and cornea can result in healing processes accompanied by a non-physiological angiogenesis. Peptidic aptamers have recently been reported to block the vascular endothelial growth factor (VEGF). However, the therapeutic applications of these aptamers is limited due to their short half-life in vivo. In this work, an enhanced stability and bioavailability of a known VEGF blocker aptamer sequence (WHLPFKC) was pursued through its tethering of molecular scaffolds based on hyperbranched peptides, the poly(ɛ-lysine) dendrons, bearing three branching generations...
October 8, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27710832/bioprinting-3d-microfibrous-scaffolds-for-engineering-endothelialized-myocardium-and-heart-on-a-chip
#15
Yu Shrike Zhang, Andrea Arneri, Simone Bersini, Su-Ryon Shin, Kai Zhu, Zahra Goli-Malekabadi, Julio Aleman, Cristina Colosi, Fabio Busignani, Valeria Dell'Erba, Colin Bishop, Thomas Shupe, Danilo Demarchi, Matteo Moretti, Marco Rasponi, Mehmet Remzi Dokmeci, Anthony Atala, Ali Khademhosseini
Engineering cardiac tissues and organ models remains a great challenge due to the hierarchical structure of the native myocardium. The need of integrating blood vessels brings additional complexity, limiting the available approaches that are suitable to produce integrated cardiovascular organoids. In this work we propose a novel hybrid strategy based on 3D bioprinting, to fabricate endothelialized myocardium. Enabled by the use of our composite bioink, endothelial cells directly bioprinted within microfibrous hydrogel scaffolds gradually migrated towards the peripheries of the microfibers to form a layer of confluent endothelium...
December 2016: Biomaterials
https://www.readbyqxmd.com/read/27702396/calvarial-defect-healing-induced-by-small-molecule-smoothened-agonist
#16
Soonchul Lee, Jia Shen, Hsin Chuan Pan, Swati Shrestha, Greg Asatrian, Alan Nguyen, Carolyn Meyers, Vi Nguyen, Min Lee, Chia Soo, Kang Ting, Aaron W James
Hedgehog (Hh) signaling positively regulates both endochondral and intramembranous ossification. Use of small molecules for tissue engineering applications pose several advantages. Here, we examined whether use of an acellular scaffold treated with the small molecule Smoothened agonist (SAG) could aid in critical size mouse calvarial defect repair. First, we verified the pro-osteogenic effect of SAG in vitro, using primary neonatal mouse calvarial cells (NMCCs). Next, a 4 mm non-healing defect was created in the mid-parietal bone of ten week old CD-1 mice...
October 5, 2016: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/27696973/tracheal-tissue-engineering-in-vivo-biocompatibility-of-mechanically-stripped-allogenic-rabbit-trachea-with-autologous-epithelial-covering
#17
Margot Den Hondt, Bart M Vanaudenaerde, Erik K Verbeken, Jan J Vranckx
BACKGROUND: Successful trachea transplantation comprises the use of biocompatible constructs with little immune-reactivity, submucosal revascularization and creation of an epithelial covering. Allogenic chondrocytes might be protected from an overt immune-response due to physical isolation. Our aim was to evaluate in-vivo biocompatibility of allotracheae, stripped of their highly-immunogenic inner lining. Secondly, we established whether these constructs might serve as suitable scaffolds for autologous epithelial grafting...
October 4, 2016: Acta Chirurgica Belgica
https://www.readbyqxmd.com/read/27689093/angiogenic-effects-of-collagen-mesoporous-nanoparticle-composite-scaffold-delivering-vegf165
#18
Joong-Hyun Kim, Tae-Hyun Kim, Min Sil Kang, Hae-Won Kim
Vascularization is a key issue for the success of tissue engineering to repair damaged tissue. In this study, we report a composite scaffold delivering angiogenic factor for this purpose. Vascular endothelial growth factor (VEGF) was loaded on mesoporous silica nanoparticle (MSN), which was then incorporated within a type I collagen sponge, to produce collagen/MSN/VEGF (CMV) scaffold. The CMV composite scaffold could release VEGF sustainably over the test period of 28 days. The release of VEGF improved the cell proliferation...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27686755/electromechanical-conditioning-of-adult-progenitor-cells-improves-recovery-of-cardiac-function-after-myocardial-infarction
#19
Aida Llucià-Valldeperas, Carolina Soler-Botija, Carolina Gálvez-Montón, Santiago Roura, Cristina Prat-Vidal, Isaac Perea-Gil, Benjamin Sanchez, Ramon Bragos, Gordana Vunjak-Novakovic, Antoni Bayes-Genis
: : Cardiac cells are subjected to mechanical and electrical forces, which regulate gene expression and cellular function. Therefore, in vitro electromechanical stimuli could benefit further integration of therapeutic cells into the myocardium. Our goals were (a) to study the viability of a tissue-engineered construct with cardiac adipose tissue-derived progenitor cells (cardiac ATDPCs) and (b) to examine the effect of electromechanically stimulated cardiac ATDPCs within a myocardial infarction (MI) model in mice for the first time...
September 29, 2016: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/27686040/in-vitro-and-in-vivo-assessment-of-controlled-release-and-degradation-of-acoustically-responsive-scaffolds
#20
Alexander Moncion, Keith J Arlotta, Eric G O'Neill, Melissa Lin, Lily A Mohr, Renny T Franceschi, Oliver D Kripfgans, Andrew J Putnam, Mario L Fabiilli
: Spatiotemporally controlled release of growth factors (GFs) is critical for regenerative processes such as angiogenesis. A common strategy is to encapsulate the GF within hydrogels, with release being controlled via diffusion and/or gel degradation (i.e., hydrolysis and/or proteolysis). However, simple encapsulation strategies do not provide spatial or temporal control of GF delivery, especially non-invasive, on-demand controlled release post implantation. We previously demonstrated that fibrin hydrogels, which are widely used in tissue engineering and GF delivery applications, can be doped with perfluorocarbon emulsion, thus yielding an acoustically responsive scaffold (ARS) that can be modulated with focused ultrasound, specifically via a mechanism termed acoustic droplet vaporization...
December 2016: Acta Biomaterialia
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