Abstract：
:Understanding the influence of a controlled spatial distribution of biological cues on cell activities can be useful to design "cell instructive" materials, able to control and guide the formation of engineered tissues in vivo and in vitro. To this purpose, biochemical and mechanical properties of the resulting biomaterial must be carefully designed and controlled. In this work, the effect of covalently immobilized RGD peptide gradients on poly(ethylene glycol) diacrylate hydrogels on cell behaviour was studied. We set up a mechanical device generating gradients based on a fluidic chamber. Cell response to RGD gradients with different slope (0.7, 1 and 2 mM cm(-1)) was qualitatively and quantitatively assessed by evaluating cell adhesion and, in particular, cell migration, compared to cells seeded on hydrogels with uniform distribution of RGD peptides. To evaluate the influence of RGD gradient and to exclude any concentration effect on cell response, all analyses were carried out in a specific region of the gradients which displayed the same average concentration of RGD (1.5 mM). Results suggest that cells recognize the RGD gradient and adhere onto it assuming a stretched shape. Moreover, cells tend to migrate in the direction of the gradient, as their speed is higher than that of cells migrating on hydrogels with a uniform distribution of RGD and increases by increasing RGD gradient steepness. This increment is due to an augmentation of bias speed component of the mean squared speed, that is, the drift of the cell population migrating on the anisotropic surface provided by the RGD gradient.
journal_name
Acta Biomaterjournal_title
Acta biomaterialiaauthors
Guarnieri D,De Capua A,Ventre M,Borzacchiello A,Pedone C,Marasco D,Ruvo M,Netti PAdoi
10.1016/j.actbio.2009.12.050subject
Has Abstractpub_date
2010-07-01 00:00:00pages
2532-9issue
7eissn
1742-7061issn
1878-7568pii
S1742-7061(09)00591-1journal_volume
6pub_type
杂志文章abstract：:Differentiation of stem and progenitor cells routinely relies on the application of soluble growth factors, an approach that enables temporal control of cell fate but enables no spatial control of the differentiation process. Angiogenic progenitor cells derived from mouse embryonic stem cells (ESCs) were differentiate...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2009.12.005
更新日期：2010-06-01 00:00:00
abstract：:This study investigated the surface characteristics and bone response of titanium implants produced by hydrothermal treatment using H(3)PO(4), and compared them with those of implants produced by commercial surface treatment methods - machining, acid etching, grit blasting, grit blasting/acid etching or spark anodizat...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2009.02.026
更新日期：2009-07-01 00:00:00
abstract：:Prosthetic joint infection (PJI) is a well-known and persisting problem. Active release coatings have promise to provide early protection to an implant by eradicating small colony biofilm contaminants or planktonic bacteria that can form biofilm. Traditional antibiotics can be limited as active release agents in that ...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2019.01.055
更新日期：2019-07-15 00:00:00
abstract：:The tooth enamel of vertebrates comprises a hyper-mineralized bioceramic, but is distinguished by an exceptional durability to resist impact and wear throughout the lifetime of organisms; however, enamels exhibit a low resistance to the initiation of large-scale cracks comparable to that of geological minerals based o...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2018.09.053
更新日期：2018-11-01 00:00:00
abstract：:Copper-containing bioactive glass nanoparticles (Cu-BG NPs) with designed compositions and sizes were synthesized and incorporated into chitosan (CH)/silk fibroin (SF)/glycerophosphate (GP) composites to prepare injectable hydrogels for cell-free bone repair. The resulting Cu-BG/CH/SF/GP gels were found to exhibit wel...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2019.04.023
更新日期：2019-06-01 00:00:00
abstract：:Glass-ceramic macroporous scaffolds for tissue engineering have been developed using a polyurethane sponge template and bioactive glass powders. The starting glass (CEL2) belongs to the system SiO(2)-P(2)O(5)-CaO-MgO-Na(2)O-K(2)O and has been synthesised by a conventional melting-quenching route. A slurry of CEL2 powd...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2006.07.012
更新日期：2007-03-01 00:00:00
abstract：:Cartilaginous tissues engineered using mesenchymal stem cells (MSCs) have been shown to generate bone in vivo by executing an endochondral programme. This may hinder the use of MSCs for articular cartilage regeneration, but opens the possibility of using engineered cartilaginous tissues for large bone defect repair. H...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2014.11.031
更新日期：2015-02-01 00:00:00
abstract：:To date, there has been little investigation of biodegradable tissue engineered arterial grafts (TEAG) using clinically relevant large animal models. The purpose of this study is to explore how pore size of electrospun scaffolds can be used to balance neoarterial tissue formation with graft structural integrity under ...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2020.08.011
更新日期：2020-10-01 00:00:00
abstract：:CuS nanoparticles (CuSNP) are degradable, readily prepared, inexpensive to produce and efficiently cleared from the body. In this work, we explored the feasibility of CuSNP to function as degradable near infrared (NIR) nanotransducers within fibrin-based cellular scaffolds. To prepare NIR-responsive CuSNP hydrogels, f...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2018.08.006
更新日期：2018-09-15 00:00:00
abstract：:A biphasic layer with a Zn-containing beta-tricalcium phosphate (ZnTCP) phase and a fluoridated hydroxyapatite (FHA) phase on titanium alloy substrate was prepared by the sol-gel technique. Scanning electron microscopy and energy-dispersive X-ray analysis results showed the ZnTCP/FHA layer to have a heterogeneous surf...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2007.08.013
更新日期：2008-03-01 00:00:00
abstract：:Polymeric ultra-thin films (nanosheets) possess unique properties that make them suitable materials for various biomedical applications. In our previous study, we assessed the use of an antibiotic (tetracycline, TC)-loaded nanosheet (or "TC-nanosheet") for the treatment of gastrointestinal tissue defects. The nanoshee...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2012.04.019
更新日期：2012-08-01 00:00:00
abstract：:Photoreactive poly(ethylene glycol) (PEG) was prepared and the polymer was photoimmobilized on organic, inorganic and metal surfaces to reduce their interaction with proteins and cells. The photoreactive PEG was synthesized by co-polymerization of methacrylate-PEG and acryloyl 4-azidobenzene. Surface modification was ...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2007.05.010
更新日期：2007-11-01 00:00:00
abstract：:A novel visible light-crosslinkable porcine gelatin was prepared for gelation and micropatterning. The preparation employed a photo-oxidation-induced crosslinking mechanism. First, furfuryl groups were incorporated into the gelatin. Second, the modified gelatin was mixed in water with Rose Bengal, which is a visible l...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2010.05.018
更新日期：2010-10-01 00:00:00
abstract：:During their application to the wet, oral environment, dentin adhesives can experience phase separation and composition change, which can compromise the quality of the hybrid layer formed at the dentin-adhesive interface. The chemical composition of polymer phases formed in the hybrid layer can be represented using a ...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2013.09.017
更新日期：2014-01-01 00:00:00
abstract：:It is of high clinical relevance in bone tissue engineering that scaffolds promote a high seeding efficiency of cells capable of osteogenic differentiation, such as human bone marrow-derived mesenchymal stem cells (hMSCs). We evaluated the effects of a novel polycaprolactone (PCL) scaffold on hMSC seeding efficiency, ...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2010.12.031
更新日期：2011-05-01 00:00:00
abstract：:One of the challenges of using bioactive bone cements is adjusting their handling properties for clinical application. To resolve the poorer handling properties of bioactive bone cements we developed a novel bioactive bone cement containing a unique polymethylmethacrylate (PMMA) powder, termed SPD-PMMA (40 μm in diame...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2011.06.006
更新日期：2011-10-01 00:00:00
abstract：:Biocompatible and elastic porous tubular structures based on poly(1,3-trimethylene carbonate), PTMC, were developed as scaffolds for tissue engineering of small-diameter blood vessels. High-molecular-weight PTMC (M(n) = 4.37 x 10(5)) was cross-linked by gamma-irradiation in an inert nitrogen atmosphere. The resulting ...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2009.10.002
更新日期：2010-04-01 00:00:00
abstract：:A series of aggregation-induced emission (AIE)-based imidazolium-type ionic liquids (ILs) were designed and synthesized for bacterial killing and imaging, cell labeling, and bacterial detection in blood cells. The AIE-based ILs showed antibacterial activities against both Escherichia coli and Staphylococcus aureus. Th...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2019.07.039
更新日期：2019-10-01 00:00:00
abstract：:Critical failures associated with current engineered bone grafts involve insufficient induction of osteogenesis of the implanted cells and lack of vascular integration between graft scaffold and host tissue. This study investigated the combined effects of surface microtextures and biochemical supplements to achieve os...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2015.02.021
更新日期：2015-05-01 00:00:00
abstract：: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 s...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2016.09.026
更新日期：2016-12-01 00:00:00
abstract：:Dicalcium phosphate dihydrate (brushite) is an osteoconductive biomaterial with great potential as a bioresorbable cement for bone regeneration. Preset brushite cement can be dehydrated into dicalcium phosphate anhydrous (monetite) bioceramics by autoclaving. This heat treatment results in changes in the physical char...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2012.04.025
更新日期：2012-08-01 00:00:00
abstract：:CRISPR gene editing technology is strategically foreseen to control diseases by correcting underlying aberrant genetic sequences. In order to overcome drawbacks associated with viral vectors, the establishment of an effective non-viral CRISPR delivery vehicle has become an important goal for nanomaterial scientists. H...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2020.07.027
更新日期：2020-09-15 00:00:00
abstract：UNLABELLED:The regeneration of hyaline cartilage remains clinically challenging. Here, we evaluated the therapeutic effects of using cell-free porous poly(lactic-co-glycolic acid) (PLGA) graft implants (PGIs) along with early loading exercise to repair a full-thickness osteochondral defect. Rabbits were randomly alloca...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2015.09.026
更新日期：2015-12-01 00:00:00
abstract：:Injectable hydrogels provide a powerful and non-invasive approach for numerous applications in cell transplantation, growth factor delivery, tissue regeneration and so forth. The properties of injectable hydrogels should be well-tuned for specific applications, where their overall design should ensure biocompatibility...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2020.02.041
更新日期：2020-04-15 00:00:00
abstract：:Osteoporosis is one of the most prevalent age-related diseases worldwide and is characterized by a systemic deterioration of bone strength (bone mineral density and bone quality) with a resulting increase in fragility fractures. Due to the complex osteoporotic pathological environment, it is a huge challenge to induce...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2020.06.024
更新日期：2020-09-01 00:00:00
abstract：:Hydrogels are appealing biomaterials for applications in regenerative medicine due to their tunable physical and bioactive properties. Meanwhile, therapeutic metal ions, such as magnesium ion (Mg2+), not only regulate the cellular behaviors but also stimulate local bone formation and healing. However, the effective de...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2017.09.039
更新日期：2017-12-01 00:00:00
abstract：:Myocardial infarction (MI) leads to the loss of cardiomyocytes, left ventricle (LV) dilation, and cardiac dysfunction, eventually developing into heart failure. Most of the strategies for MI therapy require biomaterials that can support tissue regeneration. In this study, we hypothesized that the extracellular matrix ...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2019.01.022
更新日期：2019-03-01 00:00:00
abstract：:Inhibition of bacterial growth with the simultaneous promotion of angiogenesis has been challenging in the repair and regeneration of infected tissues. Here, we aim to tackle this issue through the use of cobalt-doped silicate microspheres that can sustainably release dual ions (silicate and cobalt) at therapeutically...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2018.11.025
更新日期：2019-01-01 00:00:00
abstract：:Vascular stiffening is associated with the prognosis of cardiovascular disease (CVD). Endothelial dysfunction, as shown by reduced vasodilation and increased vasoconstriction, not only affects vascular tone, but also accelerates the progression of CVD. However, the precise effect of vascular stiffening on endothelial ...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2019.10.013
更新日期：2019-12-01 00:00:00
abstract：:This study investigated the surface characteristics, in vitro and in vivo biocompatibility of Ti-6Al-4V alloy implants incorporating strontium ions (Sr), produced by hydrothermal treatment using a Sr-containing solution, for future biomedical applications. The surface characteristics were evaluated by scanning electro...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2010.01.017
更新日期：2010-07-01 00:00:00
