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Biomaterials

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https://www.readbyqxmd.com/read/28528300/treating-metastatic-triple-negative-breast-cancer-with-cd44-neuropilin-dual-molecular-targets-of-multifunctional-nanoparticles
#1
De-Sheng Liang, Wen-Jie Zhang, Ai-Ting Wang, Hai-Tao Su, Hai-Jun Zhong, Xian-Rong Qi
Metastasis of cancer makes up the vast majority of cancer-related deaths, and it usually initiates from tumor cells invasiveness and develops through tumor neovasculature. In this work, we have fabricated a CD44/neuropilin dual receptor-targeting nanoparticulate system (tLyP-1-HT NPs) with endogenous or FDA approved components for treating metastatic triple negative breast cancer (TNBC). The enhanced specific targeting of tLyP-1-HT NPs to both metastatic tumor cells and metastasis-supporting tumor neovasculature was contributed by means of CD44/neuropilin dual receptor-mediated interaction...
May 13, 2017: Biomaterials
https://www.readbyqxmd.com/read/28535442/mining-for-osteogenic-surface-topographies-in-silico-design-to-in%C3%A2-vivo-osseo-integration
#2
Frits F B Hulshof, Bernke Papenburg, Aliaksei Vasilevich, Marc Hulsman, Yiping Zhao, Marloes Levers, Natalie Fekete, Meint de Boer, Huipin Yuan, Shantanu Singh, Nick Beijer, Mark-Anthony Bray, David J Logan, Marcel Reinders, Anne E Carpenter, Clemens van Blitterswijk, Dimitrios Stamatialis, Jan de Boer
Stem cells respond to the physicochemical parameters of the substrate on which they grow. Quantitative material activity relationships - the relationships between substrate parameters and the phenotypes they induce - have so far poorly predicted the success of bioactive implant surfaces. In this report, we screened a library of randomly selected designed surface topographies for those inducing osteogenic differentiation of bone marrow-derived mesenchymal stem cells. Cell shape features, surface design parameters, and osteogenic marker expression were strongly correlated in vitro...
May 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28528301/selective-laser-sintering-scaffold-with-hierarchical-architecture-and-gradient-composition-for-osteochondral-repair-in-rabbits
#3
Yingying Du, Haoming Liu, Qin Yang, Shuai Wang, Jianglin Wang, Jun Ma, Insup Noh, Antonios G Mikos, Shengmin Zhang
Osteochondral defects cannot be adequately self-repaired due to the presence of the sophisticated hierarchical structure and the lack of blood supply in cartilage. Thus, one of the major challenges remaining in this field is the structural design of a biomimetic scaffold that satisfies the specific requirements for osteochondral repair. To address this hurdle, a bio-inspired multilayer osteochondral scaffold that consisted of the poly(ε-caprolactone) (PCL) and the hydroxyapatite (HA)/PCL microspheres, was constructed via selective laser sintering (SLS) technique...
May 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28528299/selective-targeting-and-therapy-of-metastatic-and-multidrug-resistant-tumors-using-a-long-circulating-podophyllotoxin-nanoparticle
#4
Aniruddha Roy, Yucheng Zhao, Yang Yang, Andras Szeitz, Tara Klassen, Shyh-Dar Li
Treatment options for metastatic and multidrug resistant (MDR) tumors are limited, and most of the chemotherapeutic drugs exhibit low efficacy against MDR cancers. An anti-tubulin agent podophyllotoxin (PPT) displays high potency against MDR tumor cells. However, due to its poor solubility and non-specificity, PPT cannot be used systemically. We have developed a self-assembling nanoparticle dosage form for PPT (named Celludo) by covalently conjugating PPT and polyethylene glycol (PEG) to acetylated carboxymethyl cellulose (CMC-Ac) via ester linkages...
May 11, 2017: Biomaterials
https://www.readbyqxmd.com/read/28527302/aortic-adventitial-fibroblast-sensitivity-to-mitogen-activated-protein-kinase-inhibitors-depends-on-substrate-stiffness
#5
Rebecca A Scott, Prathamesh M Kharkar, Kristi L Kiick, Robert E Akins
Adventitial fibroblasts (AFs) are key determinants of arterial function and critical mediators of arterial disease progression. The effects of altered stiffness, particularly those observed across individuals during normal vascular function, and the mechanisms by which AFs respond to altered stiffness, are not well understood. To study the effects of matrix stiffness on AF phenotype, cytokine production, and the regulatory pathways utilized to interpret basic cell-matrix interactions, human aortic AFs were grown in 5%, 7...
May 10, 2017: Biomaterials
https://www.readbyqxmd.com/read/28521203/3d-full-field-quantification-of-cell-induced-large-deformations-in-fibrillar-biomaterials-by-combining-non-rigid-image-registration-with-label-free-second-harmonic-generation
#6
Alvaro Jorge-Peñas, Hannelore Bové, Kathleen Sanen, Marie-Mo Vaeyens, Christian Steuwe, Maarten Roeffaers, Marcel Ameloot, Hans Van Oosterwyck
To advance our current understanding of cell-matrix mechanics and its importance for biomaterials development, advanced three-dimensional (3D) measurement techniques are necessary. Cell-induced deformations of the surrounding matrix are commonly derived from the displacement of embedded fiducial markers, as part of traction force microscopy (TFM) procedures. However, these fluorescent markers may alter the mechanical properties of the matrix or can be taken up by the embedded cells, and therefore influence cellular behavior and fate...
May 10, 2017: Biomaterials
https://www.readbyqxmd.com/read/28521202/dual-growth-factor-loaded-nonmulberry-silk-fibroin-carbon-nanofiber-composite-3d-scaffolds-for-in%C3%A2-vitro-and-in%C3%A2-vivo-bone-regeneration
#7
Deboki Naskar, Ananta K Ghosh, Mahitosh Mandal, Piyali Das, Samit K Nandi, Subhas C Kundu
In recent years the potential application of nanocomposite biomaterials in tissue engineering field is gaining importance because of the combined features of all the individual components. A bottom-up approach is acquired in this study to recreate the bone microenvironment. The regenerated silk protein fibroin obtained from nonmulberry tropical tasar Antheraea mylitta species is reinforced with functionalized carbon nano fiber (CNF) and the composite sponges are fabricated using facile green aqueous based method...
May 10, 2017: Biomaterials
https://www.readbyqxmd.com/read/28521201/validation-of-the-use-of-an-artificial-mitochondrial-reporter-dna-vector-containing-a-cytomegalovirus-promoter-for-mitochondrial-transgene-expression
#8
Yuma Yamada, Takuya Ishikawa, Hideyoshi Harashima
Mitochondria have their own gene expression system that is independent of the nuclear system, and control cellular functions in cooperation with the nucleus. While a number of useful technologies for achieving nuclear transgene expression have been reported, only a few have focused on mitochondria. In this study, we validated the utility of an artificial mitochondrial DNA vector with a virus promoter on mitochondrial transgene expression. We designed and constructed pCMV-mtLuc (CGG) that contains a CMV promotor derived from Cytomegalovirus and an artificial mitochondrial genome with a NanoLuc (Nluc) luciferase gene that records adjustments to the mitochondrial codon system...
May 10, 2017: Biomaterials
https://www.readbyqxmd.com/read/28505597/an-interpenetrating-network-strengthened-and-toughened-hydrogel-that-supports-cell-based-nucleus-pulposus-regeneration
#9
Yibo Gan, Pei Li, Liyuan Wang, Xiumei Mo, Lei Song, Yuan Xu, Chen Zhao, Bin Ouyang, Bing Tu, Lei Luo, Linyong Zhu, Shiwu Dong, Fuyou Li, Qiang Zhou
Hydrogel is a suitable scaffold for the nucleus pulposus (NP) regeneration. However, its unmatched mechanical properties lead to implant failure in late-stage disc degeneration because of structural failure and implant extrusion after long-term compression. In this study, we evaluated an interpenetrating network (IPN)-strengthened and toughened hydrogel for NP regeneration, using dextran and gelatin as the primary network while poly (ethylene glycol) as the secondary network. The aim of this study was to realize the NP regeneration using the hydrogel...
May 10, 2017: Biomaterials
https://www.readbyqxmd.com/read/28525855/surface-design-of-magnetic-nanoparticles-for-stimuli-responsive-cancer-imaging-and-therapy
#10
REVIEW
Taegyu Kang, Fangyuan Li, Seungmin Baik, Wei Shao, Daishun Ling, Taeghwan Hyeon
Magnetic nanoparticles (MNPs) have been extensively studied for their potential applications to cancer diagnosis and treatment. However, various obstacles limit the use of nanoparticles for delivery in the tumor microenvironment. As a viable solution to such obstacles, advances in nanoparticle surface engineering augmented by a profound understanding of cancer physiology present new opportunities for MNP-based imaging and therapeutic agents. Stimuli-responsive ligands, rationally designed to interact with various physicochemical aspects, can improve the performance of MNPs in cancer-targeted imaging and therapy...
May 8, 2017: Biomaterials
https://www.readbyqxmd.com/read/28511143/dna-assisted-upconversion-nanoplatform-for-imaging-guided-synergistic-therapy-and-laser-switchable-drug-detoxification
#11
Luoyuan Li, Panlong Hao, Peng Wei, Limin Fu, Xicheng Ai, Jianping Zhang, Jing Zhou
The side effects of chemotherapy bring significant physical and psychological suffering to patients. To solve this urgent medical problem, Yb(3+) and Er(3+) co-doped NaLuF4 upconversion nanoparticles (UCNPs) were constructed for upconversion luminescence (UCL)-labeled diagnosis under 980 nm laser irradiation. The UCNPs were then modified layer by layer with polypyrrole and a special programming DNA segment as photothermal conversion agents and controllable drug carriers, respectively. The nanoplatform was successfully used for imaging-guided synergistic therapy (photothermal therapy and chemotherapy) at a safe power density (300 mW cm(-2)), and DNA-assisted detoxification at lower temperature in cancer cells when the laser off...
May 5, 2017: Biomaterials
https://www.readbyqxmd.com/read/28505596/engineered-hydrogels-increase-the-post-transplantation-survival-of-encapsulated-hesc-derived-midbrain-dopaminergic-neurons
#12
Maroof M Adil, Tandis Vazin, Badriprasad Ananthanarayanan, Gonçalo M C Rodrigues, Antara T Rao, Rishikesh U Kulkarni, Evan W Miller, Sanjay Kumar, David V Schaffer
Cell replacement therapies have broad biomedical potential; however, low cell survival and poor functional integration post-transplantation are major hurdles that hamper clinical benefit. For example, following striatal transplantation of midbrain dopaminergic (mDA) neurons for the treatment of Parkinson's disease (PD), only 1-5% of the neurons typically survive in preclinical models and in clinical trials. In general, resource-intensive generation and implantation of larger numbers of cells are used to compensate for the low post-transplantation cell-survival...
May 5, 2017: Biomaterials
https://www.readbyqxmd.com/read/28494265/intramyocardial-fate-and-effect-of-iron-nanoparticles-co-injected-with-macs-%C3%A2-purified-stem-cell-products
#13
Paula Müller, Ralf Gaebel, Heiko Lemcke, Frank Wiekhorst, Frauke Hausburg, Cajetan Lang, Nicole Zarniko, Bernd Westphal, Gustav Steinhoff, Robert David
BACKGROUND: Magnetic activated cell sorting (MACS(®)) is routinely used to isolate stem cell subpopulations intended for the treatment of cardiovascular diseases. In strong contrast, studies examining the amount, effect and intramyocardial distribution of iron nanoparticles used for magnetic cell labelling are missing, although iron excess can cause functional disorders in the heart. METHODS AND RESULTS: CD133(+) haematopoietic and CD271(+) mesenchymal stem cells were purified from bone marrow using automatically and manually MACS(®) based systems...
May 4, 2017: Biomaterials
https://www.readbyqxmd.com/read/28511142/tailoring-nanostructured-lipid-carriers-for-the-delivery-of-protein-antigens-physicochemical-properties-versus-immunogenicity-studies
#14
Thomas Courant, Emilie Bayon, Hei Lanne Reynaud-Dougier, Christian Villiers, Mathilde Menneteau, Patrice N Marche, Fabrice P Navarro
New vaccine formulations are still highly anticipated in the near-future to face incoming health challenges, such as emergence or reemergence of severe infectious diseases, immunosenescence associated with elderly or the spread of pathogens resistant to antibiotics. In particular, new nanoparticle-based adjuvants are promising for sub-unit vaccines in order to elicit potent and long lasting immune responses with a better control on their safety. In this context, an innovative delivery system of protein antigens has been designed based on the chemical grafting of the antigen onto the shell of Nanostructured Lipid Carriers (NLC)...
May 3, 2017: Biomaterials
https://www.readbyqxmd.com/read/28499127/3d-printed-scaffolds-with-synergistic-effect-of-hollow-pipe-structure-and-bioactive-ions-for-vascularized-bone-regeneration
#15
Wenjie Zhang, Chun Feng, Guangzheng Yang, Guanglong Li, Xun Ding, Shaoyi Wang, Yuandong Dou, Zhiyuan Zhang, Jiang Chang, Chengtie Wu, Xinquan Jiang
Segmental bone regeneration remains a considerable challenge due to the associated low degree of vascularization. To solve this problem, in this study, hollow-pipe-packed silicate bioceramic (BRT-H) scaffolds are fabricated using a coaxial three-dimensional (3D) printing technique. Based on a modified core/shell printer nozzle and a modulated viscoelastic bioceramic paste, hollow struts with an external diameter of 1 mm and internal dimeter of 500 μm can be directly printed, yielding a compressive strength of the BRT-H scaffolds as high as 26 MPa...
May 3, 2017: Biomaterials
https://www.readbyqxmd.com/read/28494264/high-yield-scalable-and-remotely-drug-loaded-neutrophil-derived-extracellular-vesicles-evs-for-anti-inflammation-therapy
#16
Jin Gao, Sihan Wang, Zhenjia Wang
Extracellular vesicles (EVs) are nanoscale membrane-formed compartments naturally secreted from cells, which are intercellular mediators regulating physiology and pathogenesis, therefore they could be a novel therapeutic carrier for targeted delivery. However, the translation of EVs is hindered by the heterogeneous composition, low yield, inefficient drug loading and unlikely scalability. Here we report a strategy to generate EVs using nitrogen cavitation (NC-EVs) that instantly disrupts neutrophils to form nanosized membrane vesicles...
May 3, 2017: Biomaterials
https://www.readbyqxmd.com/read/28478327/high-throughput-differential-identification-of-tmprss2-erg-fusion-genes-in-prostate-cancer-patient-urine
#17
Hyojin Lee, Dongjin Lee, Jea Ho Park, Sang Hoon Song, In Gab Jeong, Choung-Soo Kim, Peter C Searson, Kwan Hyi Lee
Identifying genetic diversity is important for studies in cancer as it can provide insights on disease progression and treatment. Although clinical outcome and major symptom of cancer might be same in all patients, the type of overexpressed gene could be different. Even though prostate-specific antigen assay is a good tool widely used for prostate cancer diagnosis, it is not capable of providing information on genetic differences. Therefore, screening method that can differentiate genetic differences is necessary...
April 29, 2017: Biomaterials
https://www.readbyqxmd.com/read/28477492/human-kunitz-type-protease-inhibitor-engineered-for-enhanced-matrix-retention-extends-longevity-of-fibrin-biomaterials
#18
Priscilla S Briquez, Kristen M Lorentz, Hans M Larsson, Peter Frey, Jeffrey A Hubbell
Aprotinin is a broad-spectrum serine protease inhibitor used in the clinic as an anti-fibrinolytic agent in fibrin-based tissue sealants. However, upon re-exposure, some patients suffer from hypersensitivity immune reactions likely related to the bovine origin of aprotinin. Here, we aimed to develop a human-derived substitute to aprotinin. Based on sequence homology analyses, we identified the Kunitz-type protease inhibitor (KPI) domain of human amyloid-β A4 precursor protein as being a potential candidate...
April 29, 2017: Biomaterials
https://www.readbyqxmd.com/read/28486147/multimodal-assessment-of-sers-nanoparticle-biodistribution-post-ingestion-reveals-new-potential-for-clinical-translation-of-raman-imaging
#19
Jos L Campbell, Elliott D SoRelle, Ohad Ilovich, Orly Liba, Michelle L James, Zhen Qiu, Valerie Perez, Carmel T Chan, Adam de la Zerda, Cristina Zavaleta
Despite extensive research and development, new nano-based diagnostic contrast agents have faced major barriers in gaining regulatory approval due to their potential systemic toxicity and prolonged retention in vital organs. Here we use five independent biodistribution techniques to demonstrate that oral ingestion of one such agent, gold-silica Raman nanoparticles, results in complete clearance with no systemic toxicity in living mice. The oral delivery mimics topical administration to the oral cavity and gastrointestinal (GI) tract as an alternative to intravenous injection...
April 28, 2017: Biomaterials
https://www.readbyqxmd.com/read/28482232/control-of-angiogenesis-and-host-response-by-modulating-the-cell-adhesion-properties-of-an-elastin-like-recombinamer-based-hydrogel
#20
Sebastian Manuel Staubli, Giulia Cerino, Israel Gonzalez De Torre, Matilde Alonso, Daniel Oertli, Friedrich Eckstein, Katharina Glatz, José Carlos Rodríguez Cabello, Anna Marsano
The control of the in vivo vascularization of engineered tissue substitutes is essential in order to obtain either a rapid induction or a complete inhibition of the process (e.g. in muscles and hyaline-cartilage, respectively). Among the several polymers available, Elastin-Like Recombinamers (ELR)-based hydrogel stands out as a promising material for tissue engineering thanks to its viscoelastic properties, non-toxicity, and non-immunogenicity. In this study, we hypothesized that varying the cell adhesion properties of ELR-hydrogels could modulate the high angiogenic potential of adipose tissue-derived stromal vascular fraction (SVF) cells, predominantly composed of endothelial/mural and mesenchymal cells...
April 28, 2017: Biomaterials
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