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Regenerative Biomaterials

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https://www.readbyqxmd.com/read/30338128/-in-situ-cardiac-regeneration-by-using-neuropeptide-substance-p-and-igf-1c-peptide-eluting-heart-patches
#1
Muhammad Shafiq, Yue Zhang, Dashuai Zhu, Zongxian Zhao, Dong-Hwee Kim, Soo Hyun Kim, Deling Kong
Cardiovascular diseases cause huge socio-economic burden worldwide. Although a mammalian myocardium has its own limited healing capability, scaffold materials capable of releasing stem cell recruiting/engrafting factors may facilitate the regeneration of the infarcted myocardium. The aim of this research was to develop cardiac patches capable of simultaneously eluting substance P (SP) and insulin-like growth factor-1C (IGF-1C) peptide. Polycaprolactone/collagen type 1-based patches with or without SP and IGF-1C peptide were fabricated by co-electrospinning, which exhibited nanofibrous morphology...
October 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/30338127/on-the-electrical-conductivity-of-alginate-hydrogels
#2
Georgia Kaklamani, Diana Kazaryan, James Bowen, Fabrice Iacovella, Spiros H Anastasiadis, George Deligeorgis
Hydrogels have been extensively used in the field of biomedical applications, offering customizable natural, synthetic or hybrid materials, particularly relevant in the field of tissue engineering. In the bioelectronics discipline, hydrogels are promising mainly as sensing platforms with or without encapsulated cells, showing great potential in healthcare and medicine. However, to date there is little data in the literature which characterizes the electrical properties of tissue engineering materials which are relevant to bioelectronics...
October 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/30338126/a-high-strength-mineralized-collagen-bone-scaffold-for-large-sized-cranial-bone-defect-repair-in-sheep
#3
Shuo Wang, Zhijun Zhao, Yongdong Yang, Antonios G Mikos, Zhiye Qiu, Tianxi Song, Fuzhai Cui, Xiumei Wang, Chunyang Zhang
Large-sized cranial bone defect repair presents a great challenge in the clinic. The ideal cranioplasty materials to realize the functional and cosmetic recovery of the defect must have sufficient mechanical support, excellent biocompatibility, good osseointegration and biodegradability as well. In this study, a high-strength mineralized collagen (MC) bone scaffold was developed with biomimetic composition, microstructure and mechanical properties for the repair of sheep large-sized cranial bone defects in comparison with two traditional cranioplasty materials, polymethyl methacrylate and titanium mesh...
October 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/30338125/co-solvent-polarity-controlled-self-assembly-of-tetraphenylethylene-buried-amphiphile-for-size-regulated-tumor-accumulation
#4
Jingsheng Huang, Yun Chen, Pengxiang Zhao, Yunlong Yu, Shiyong Zhang, Zhongwei Gu
We report that the co-solvent polarity can precisely control the TPE-buried amphiphile 1 to self-assemble into nanoparticles (NPs) in water with size range from ∼21-32 nm to 55-68 nm to 95-106 nm. Excepted for size, these TPE-buried amphiphile fabricated NPs hold identical physical properties such as spherical shape, surface charge, and luminescent properties, and moreover, after covalent capture of the acrylate hydrophilic heads, the resulting cross-linked NPs (cNPs I-III) own excellent in vivo stability, which thus would be an ideal platform for investigating the size effects on tumor accumulation and penetration...
October 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/30338124/a-proteomics-study-to-explore-the-role-of-adsorbed-serum-proteins-for-pc12-cell-adhesion-and-growth-on-chitosan-and-collagen-chitosan-surfaces
#5
Xiaoying Lü, Heng Zhang, Yan Huang, Yiwen Zhang
The aim of this article is to apply proteomics in the comparison of the molecular mechanisms of PC12 cell adhesion and growth mediated by the adsorbed serum proteins on the surfaces of chitosan and collagen/chitosan films. First, the chitosan and the collagen/chitosan films were prepared by spin coating; and their surface morphologies were characterized by scanning electron microscopy, X-ray energy dispersive spectroscopy, contact angle measurement and Fourier transform infrared spectroscopy. Subsequently, cell proliferation experiments on two materials were performed and the dynamic curves of protein adsorption on their surfaces were measured...
October 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/30338123/ph-responsive-superstructures-prepared-via-the-assembly-of-fe-3-o-4-amphipathic-janus-nanoparticles
#6
Shuang Cai, Bin Luo, Xiaohui Zhan, Xiaoxi Zhou, Fang Lan, Qiangying Yi, Yao Wu
The strategy of using Fe3 O4 amphiphilic Janus nanoparticles (Fe3 O4 @AJNPs) bearing β-cyclodextrin (β-CD) and aminopyridine (APD) functionalized polymethyl methacrylate (PGMA) to construct pH-stimuli responsive co-assemblies through host-guest interactions between β-CD and APD was proposed. The spherical co-assemblies with an average diameter about 210 nm were excellent magnetic responsive and quite stable even up to 2 months in deionized water. The pH-liable capability of these co-assemblies was revealed by disassembly of the formed superstructures with destruction of the built inclusion complexes...
October 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/30094063/construction-and-evaluation-of-fibrillar-composite-hydrogel-of-collagen-konjac-glucomannan-for-potential-biomedical-applications
#7
Jiayuan Tang, Jinlin Chen, Jing Guo, Qingrong Wei, Hongsong Fan
Konjac glucomannan (KGM) is recognized as a safe material for its health-promoting benefits and thus widely used in various fields including pharmaceutical industry. In recent decades, the combination of collagen and KGM attracts more attentions for biomedical purpose, especially the hybrid films of collagen-KGM or collagen-KGM-polysaccharide. In this study, to further and deeply develop the intrinsic values of both collagen and KGM as biomaterials, a novel kind of composite hydrogel comprising collagen and KGM at a certain ratio was fabricated under mild conditions via fibrillogenesis process of the aqueous blends of collagen and KGM that experienced deacetylation simultaneously...
August 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/30094062/incorporation-of-silica-nanoparticles-to-plga-electrospun-fibers-for-osteogenic-differentiation-of-human-osteoblast-like-cells
#8
Xing Yang, Yuanyuan Li, Xujie Liu, Qianli Huang, Ranran Zhang, Qingling Feng
The development of bone tissue engineering scaffolds still remains a challenging field, although various biomaterials have been developed for this purpose. Electrospinning is a promising approach to fabricate nanofibers with an interconnected porous structure, which can support cell adhesion, guide cell proliferation and regulate cell differentiation. The aim of this study is to fabricate composite fibers composed of poly(lactic-co-glycolic acid) (PLGA) and silica nanoparticles (NPs) via electrospinning and investigate the effect of PLGA/SiO2 composite fibers on the cellular response of osteoblast-like cells (SaOS-2 cells)...
August 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/30094061/application-of-osteoinductive-calcium-phosphate-ceramics-in-children-s-endoscopic-neurosurgery-report-of-five-cases
#9
Jia Wei, Hufei Qian, Yu Liu, Jiangang Liu, Rui Zhao, Xiao Yang, Xiangdong Zhu, Ruoping Chen, Xingdong Zhang
This work aimed at investigating the possibility and effectiveness of osteoinductive calcium phosphate (CaP) ceramics to close the drilled skull holes and prevent the postoperative cerebrospinal fluid (CSF) leaking in children's endoscopic neurosurgery. Five children patients (four boys and one girl, 3- to 8-years old) underwent the surgery, in which the endoscopic third ventriculostomy (ETV) was operated in four cases of hydrocephalus, and biopsy and ETV were both performed in one case of pineal tumor. The drilled skull holes were filled with the commercial osteoinductive CaP ceramics...
August 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/30094060/tissue-engineering-using-3d-printed-nano-bioactive-glass-loaded-with-nell1-gene-for-repairing-alveolar-bone-defects
#10
Jing Zhang, Yang Chen, Jing Xu, Jingjing Wang, Chengzhang Li, Liyan Wang
The purposes of this study were to construct a novel tissue engineered bone composed of 3D-printed bioactive glass block/chitosan nanoparticles (BD/CSn) composites loaded with Nel-like Type I molecular-1 DNA (pDNA-NELL1) and/or bone marrow mesenchymal stem cells (BMSCs), and study their osteogenic activities by repairing bone defects in rhesus monkeys. CSn with NELL1 gene plasmid and rhesus monkey BMSCs were composited with a BD scaffold to prepare the tissue-engineered bone. Four adult female rhesus monkeys with 10- to 12-years old and 5-7 kg in weight were used in animal experiments...
August 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/30094059/bone-tissue-engineering-via-growth-factor-delivery-from-scaffolds-to-complex-matrices
#11
REVIEW
Tinke-Marie De Witte, Lidy E Fratila-Apachitei, Amir A Zadpoor, Nicholas A Peppas
In recent years, bone tissue engineering has emerged as a promising solution to the limitations of current gold standard treatment options for bone related-disorders such as bone grafts. Bone tissue engineering provides a scaffold design that mimics the extracellular matrix, providing an architecture that guides the natural bone regeneration process. During this period, a new generation of bone tissue engineering scaffolds has been designed and characterized that explores the incorporation of signaling molecules in order to enhance cell recruitment and ingress into the scaffold, as well as osteogenic differentiation and angiogenesis, each of which is crucial to successful bone regeneration...
August 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/30094058/hesitant-steps-from-the-artificial-skin-to-organ-regeneration
#12
REVIEW
Ioannis V Yannas
This is a historical account of the steps, both serendipitous and rational, that led my group of students and colleagues at MIT and Harvard Medical School to discover induced organ regeneration. Our research led to methods for growing back in adult mammals three heavily injured organs, skin, peripheral nerves and the conjunctiva. We conclude that regeneration in adults is induced by a modification of normal wound healing.
August 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/29977596/the-directional-migration-and-differentiation-of-mesenchymal-stem-cells-toward-vascular-endothelial-cells-stimulated-by-biphasic-calcium-phosphate-ceramic
#13
Ying Chen, Jing Wang, Xiangdong Zhu, Xuening Chen, Xiao Yang, Kai Zhang, Yujiang Fan, Xingdong Zhang
Osteoinductivity of porous calcium phosphate (CaP) ceramics has been widely investigated and confirmed, and it might be attributed to the rapid formation of the vascular networks after in vivo implantation of the ceramics. In this study, to explore the vascularization mechanism within the CaP ceramics, the migration and differentiation of bone marrow-derived mesenchymal stem cells (BMSCs) under the stimulation of porous biphasic calcium phosphate (BCP) ceramic with excellent osteoinductivity were systematically investigated...
June 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/29977595/smart-scaffolds-in-tissue-regeneration
#14
Samad Ahadian, Ali Khademhosseini
Recent advances in biofabrication technologies and chemical synthesis approaches have enabled the fabrication of smart scaffolds that aim to mimic the dynamic nature of the native extracellular matrix. These scaffolds have paved the way for tissue regeneration in a dynamic and controllable manner.
June 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/29942650/endovascular-stent-induced-alterations-in-host-artery-mechanical-environments-and-their-roles-in-stent-restenosis-and-late-thrombosis
#15
REVIEW
Jinxuan Wang, Xuepu Jin, Yuhua Huang, Xiaolin Ran, Desha Luo, Dongchuan Yang, Dongyu Jia, Kang Zhang, Jianhua Tong, Xiaoyan Deng, Guixue Wang
Cardiovascular stent restenosis remains a major challenge in interventional treatment of cardiovascular occlusive disease. Although the changes in arterial mechanical environment due to stent implantation are the main causes of the initiation of restenosis and thrombosis, the mechanisms that cause this initiation are still not fully understood. In this article, we reviewed the studies on the issue of stent-induced alterations in arterial mechanical environment and discussed their roles in stent restenosis and late thrombosis from three aspects: (i) the interaction of the stent with host blood vessel, involve the response of vascular wall, the mechanism of mechanical signal transmission, the process of re-endothelialization and late thrombosis; (ii) the changes of hemodynamics in the lumen of the vascular segment and (iii) the changes of mechanical microenvironment within the vascular segment wall due to stent implantation...
June 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/29942649/poly-ethylene-glycol-hydrogel-elasticity-influences-human-mesenchymal-stem-cell-behavior
#16
Anna K Whitehead, Haley H Barnett, Mary E Caldorera-Moore, Jamie J Newman
Coordinated investigations into the interactions between biologically mimicking (biomimetic) material constructs and stem cells advance the potential for the regeneration and possible direct replacement of diseased cells and tissues. Any clinically relevant therapies will require the development and optimization of methods that mass produce fully functional cells and tissues. Despite advances in the design and synthesis of biomaterial scaffolds, one of the biggest obstacles facing tissue engineering is understanding how specific extracellular cues produced by biomaterial scaffolds influence the proliferation and differentiation of various cell sources...
June 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/29942648/synthesis-of-photo-reactive-poly-vinyl-alcohol-and-construction-of-scaffold-free-cartilage-like-pellets-in-vitro
#17
Bao Li, Yongli Gao, Likun Guo, Yujiang Fan, Naoki Kawazoe, Hongsong Fan, Xingdong Zhang, Guoping Chen
Photo-reactive poly(vinyl alcohol) (PRPVA) was synthesized by introduction of phenyl azido groups into poly(vinyl alcohol) (PVA) and applied for surface modification. PRPVA was grafted onto cell culture plate surface homogeneously or in a micropattern. Human mesenchymal stem cells (hMSCs) cultured on cell culture plate surface and PVA-modified surface showed different behaviors. Cells adhered and spread well on cell culture plate surface, while they did not adhere on PVA-grafted surface at all. When hMSCs were cultured on PVA-micropatterned surface, they formed a cell micropattern...
June 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/29942647/a-study-of-the-initial-adhesive-force-of-cells-on-silk-fibroin-based-materials-using-micropipette-aspiration
#18
Xiaojie Lian, Shichao Liu, Liming Liu, Rui Xu, Miaomiao Du, Song Wang, Hesun Zhu, Qiang Lu, Quanyou Zhang, Yali Wu, Di Huang, Yan Wei
With the development of biomaterials, more attention is paid to the adhesion characteristics between cells and materials. It is necessary to study the adhesive force with a suitable method. Silk fibroin (SF) is widely investigated in biomedical application due to its novel biocompatibility and mechanical properties. In this article, the micropipette aspiration method and measurement pattern of uniform cells in round shape (UCR) was used to study the initial adhesive force of three types of cells on pure silk fibroin films (SFFs)...
June 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/29942646/lactosylated-n-alkyl-polyethylenimine-coated-iron-oxide-nanoparticles-induced-autophagy-in-mouse-dendritic-cells
#19
Taipeng Shen, Wencheng Zhu, Li Yang, Li Liu, Rongrong Jin, Jimei Duan, James M Anderson, Hua Ai
Dendritic cell (DC)-based vaccines have shown promising therapeutic results in cancer and some immune disorders. It is critical to track in vivo migration behaviours of DCs and monitor the whole process dynamically and non-invasively. Superparamagnetic iron oxide (SPIO) nanoparticles are chosen for DC labelling under magnetic resonance imaging (MRI) because of their proven biosafety as contrast agents. However, when used for cell labelling, sensitive biological indicators such as cell autophagy may be helpful to better understand the process and improve the probe design...
June 2018: Regenerative Biomaterials
https://www.readbyqxmd.com/read/29644093/effect-of-microporosity-on-scaffolds-for-bone-tissue-engineering
#20
REVIEW
Ke Zhang, Yubo Fan, Nicholas Dunne, Xiaoming Li
Microporosity has a critical role in improving the osteogenesis of scaffolds for bone tissue engineering. Although the exact mechanism, by which it promotes new bone formation, is not well recognized yet, the related hypothesis can be found in many previous studies. This review presents those possible mechanisms about how the microporosity enhances the osteogenic-related functions of cells in vitro and the osteogenic activity of scaffolds in vivo . In summary, the increased specific surface areas by microporosity can offer more protein adsorption sites and accelerate the release of degradation products, which facilitate the interactions between scaffolds and cells...
March 2018: Regenerative Biomaterials
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