Abstract:
:Photodynamic therapy (PDT) is a new therapeutic approach for the palliative treatment of malignant bile duct obstruction. In this study, we designed photosensitizer-embedded self-expanding nonvascular metal stent (PDT-stent) which allows repeatable photodynamic treatment of cholangiocarcinoma without systemic injection of photosensitizer. Polymeric photosensitizer (pullulan acetate-conjugated pheophorbide A; PPA) was incorporated in self-expanding nonvascular metal stent. Residence of PPA in the stent was estimated in buffer solution and subcutaneous implantation on mouse. Photodynamic activity of PDT-stent was evaluated through laserexposure on stent-layered tumor cell lines, HCT-116 tumor-xenograft mouse models and endoscopic intervention of PDT-stent on bile duct of mini pigs. Photo-fluorescence imaging of the PDT-stent demonstrated homogeneous embedding of polymeric Pheo-A (PPA) on stent membrane. PDT-stent sustained its photodynamic activities at least for 2 month. And which implies repeatable endoscopic PDT is possible after stent emplacement. The PDT-stent after light exposure successfully generated cytotoxic singlet oxygen in the surrounding tissues, inducing apoptotic degradation of tumor cells and regression of xenograft tumors on mouse models. Endoscopic biliary in-stent photodynamic treatments on minipigs also suggested the potential efficacy of PDT-stent on cholangiocarcinoma. In vivo and in vitro studies revealed our PDT-stent, allows repeatable endoscopic biliary PDT, has the potential for the combination therapy (stent plus PDT) of cholangiocarcinoma.
journal_name
Biomaterialsjournal_title
Biomaterialsauthors
Bae BC,Yang SG,Jeong S,Lee DH,Na K,Kim JM,Costamagna G,Kozarek RA,Isayama H,Deviere J,Seo DW,Nageshwar Reddy Ddoi
10.1016/j.biomaterials.2014.07.001subject
Has Abstractpub_date
2014-10-01 00:00:00pages
8487-95issue
30eissn
0142-9612issn
1878-5905pii
S0142-9612(14)00783-2journal_volume
35pub_type
杂志文章相关文献
BIOMATERIALS文献大全abstract::Two types of cells--human platelets and spore cells--were encapsulated in polymer shells by adsorbing polyanions and polycations in a stepwise fashion. The encapsulated cells were attached to gold and silicon surfaces and their morphological and adhesion properties were studied in air using tapping mode atomic force m...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2003.10.061
更新日期:2004-08-01 00:00:00
abstract::To prevent bone metastasis, we developed polyethylene glycol (PEG)-conjugated aspartic acid (Asp)-modified liposomes (PEG-Asp-Lipo) as a bone-targeting carrier of paclitaxel (PTX) by using Asp-modified 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (DPPE-Asp). The affinity of Asp-modified liposomes to hydroxyapatite...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2017.10.053
更新日期:2018-02-01 00:00:00
abstract::Acetaminophen (APAP) is the most widely used analgesic and its overdose, intentional or unintentional, is known to cause massive oxidative stress and liver tissue damages characterized by hepatocellular apoptosis and hemorrhagic necrosis, leading to acute liver failure (ALF). There has been great interest in the use o...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2014.01.048
更新日期:2014-04-01 00:00:00
abstract::The development of topical microbicides is a valid approach to protect the genital mucosa from sexually transmitted infections that cannot be contained with effective vaccination, like HSV and HIV infections. A suitable target of microbicides is the interaction between viral proteins and cell surface heparan sulfate p...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2016.01.055
更新日期:2016-04-01 00:00:00
abstract::High throughput cellular studies require small sample volume to reduce costs and enhance sensitivity. Microfluidics-generated water-in-oil (W/O) single emulsion droplet systems, in particular, provide uniform, well defined and discrete microenvironment for cell culture, screening, and sorting. However, these single em...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2013.03.002
更新日期:2013-06-01 00:00:00
abstract::The degradation of poly[bis(glycine ethyl ester)phosphazene] in aqueous media was studied by following the appearance of some of its expected by-products in solution. Disc-shaped polymer slabs of 12 mm diameter and 1.2 mm thickness were prepared by compression moulding, followed by incubation in aqueous media under ca...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/0142-9612(93)90235-t
更新日期:1993-06-01 00:00:00
abstract::Artificial extracellular matrix proteins, genetically engineered from elastin- and fibronectin-derived repeating units, were crosslinked with hexamethylene diisocyanate in dimethylsulfoxide. The resulting hydrogel films were transparent, uniform, and highly extensible. Their tensile moduli depended on crosslinker conc...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/s0142-9612(03)00635-5
更新日期:2004-03-01 00:00:00
abstract::Electrically conducting polymers hold promise for developing advanced neuroprostheses, bionic systems and neural repair devices. Among them, poly(3, 4-ethylenedioxythiophene) doped with polystyrene sulfonate (PEDOT:PSS) exhibits superior physicochemical properties but biocompatibility issues have limited its use. We d...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2010.08.057
更新日期:2010-12-01 00:00:00
abstract::This paper describes a method of foaming a polymer system comprising poly(ethyl methacrylate)/tetrahydrofurfuryl methacrylate (PEMA/THFMA), characterisation of the resulting porosity and use of the foam for chondrocyte culture. The potential for this polymer system to support cartilage repair has been investigated pre...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2003.10.023
更新日期:2004-08-01 00:00:00
abstract::One of the major limitations of studying cancer-bone metastasis has been the lack of an appropriate ex-vivo model which can be used under defined conditions that simulates closely the in vivo live bone microenvironment in response to cancer-bone interactions. We have developed and utilized a three-dimensional (3D) can...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2011.10.046
更新日期:2012-02-01 00:00:00
abstract::Stroke, traumatic brain injuries, and other similar conditions often lead to significant loss of functional brain tissue and associated disruption of neuronal signaling. A common strategy for replacing lost neurons is the injection of dissociated neural stem cells or differentiated neurons. However, this method is unl...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2018.11.031
更新日期:2019-02-01 00:00:00
abstract::Pectin-derived matrices are now being examined and tested for controlled drug delivery. Pectin is intact in the upper gastrointestinal tract and degraded by colonic microflora. The composition of this microflora remains relatively consistent across a diverse human population. Thus, pectin-derived drug carriers provide...
journal_title:Biomaterials
pub_type: 杂志文章,评审
doi:10.1016/s0142-9612(03)00213-8
更新日期:2003-08-01 00:00:00
abstract::Effect of poly(epsilon-caprolactone) (PCL) content on the bioactivity and mechanical properties of PCL/silica hybrid was investigated. The PCL/silica hybrids with different PCL contents were prepared through co-condensation reaction with triethoxysilane end capped PCL and tetraethyl orthosilicate. The higher the PCL c...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2003.08.004
更新日期:2004-03-01 00:00:00
abstract::Matrix remodeling plays a fundamental role in physiological and pathological processes, as well as in tissue engineering applications. In this paper, optical coherence tomography (OCT), a non-destructive optical imaging technology, was used to image collagen gel remodeling by smooth muscle cells (SMCs). The optical sc...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2010.06.042
更新日期:2010-11-01 00:00:00
abstract::Renal regeneration approaches offer great potential for the treatment of chronic kidney disease, but their availability remains limited by the clinical challenges they pose. In the present study, we used continuous detergent perfusion to generate decellularized (DC) rat kidney scaffolds. The scaffolds retained intact ...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2014.04.074
更新日期:2014-08-01 00:00:00
abstract::One of the main issues in orthopaedic implant design is the fabrication of scaffolds that closely mimic the biomechanical properties of the surrounding bone. This research reports on a multi-stage rapid prototyping technique that was successfully developed to produce porous titanium scaffolds with fully interconnected...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2008.05.032
更新日期:2008-09-01 00:00:00
abstract::In this work, an N-varied dissipative particle dynamics (DPD) simulation technique is applied to investigate detailed endocytosis kinetics for ligand-coated nanoparticles with different shapes, including sphere-, rod- and disk-shaped nanoparticles. Our results indicate that the rotation of nanoparticles, which is one ...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2012.03.044
更新日期:2012-06-01 00:00:00
abstract::Virus-based nanoparticles have shown promise as vehicles for delivering therapeutic genes. However, the rational design of viral vectors that enable selective tropism towards particular types of cells and tissues remains challenging. Here, we explored structural-functional relationships of the adeno-associated virus 2...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2015.11.066
更新日期:2016-02-01 00:00:00
abstract::The maximum capacity of a hydrophobic adsorbent is interpreted in terms of square or hexagonal (cubic and face-centered-cubic, FCC) interfacial packing models of adsorbed blood proteins in a way that accommodates experimental measurements by the solution-depletion method and quartz-crystal-microbalance (QCM) for the h...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2010.09.075
更新日期:2011-02-01 00:00:00
abstract::Besides toxicity tests, biokinetic studies are a fundamental part of investigations to evaluate a safe and sustainable use of nanoparticles. Today, gold nanoparticles (Au NPs) are known to be a versatile tool in different areas such as science, engineering or medicine. In this study, we investigated the biokinetics af...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2010.05.009
更新日期:2010-09-01 00:00:00
abstract::The in vivo properties of a new kind of calcium phosphate cement were investigated in this study. Calcium phosphate cement was implanted as paste into femoral bone and dorsal muscle of dogs for 3 and 6 months, and as prehardened form into thigh muscles of dogs for 1, 2 and 6 months. Histology was performed on thin un-...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/s0142-9612(00)00016-8
更新日期:2000-06-01 00:00:00
abstract::The kinetics of thrombin inhibition by antithrombin (AT) and heparin cofactor II (HC II) were analysed as a function of the heparin concentration, from 10(-9) to 10(-4) M. The initial concentrations of inhibitor (l) and thrombin (E) were set at equimolar levels (CI = CE = 10(-8) M). The experimental data indicate that...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/s0142-9612(96)00125-1
更新日期:1997-02-01 00:00:00
abstract::Ultra-high molecular-weight polyethylene (UHMWPE) has been used in total joint replacement for the last three decades. Despite the recent advancements in prosthesis design, the wear of UHMWPE remains a serious clinical problem; the release of wear debris may induce osteolysis and implant loosening. Controlling the qua...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/s0142-9612(03)00264-3
更新日期:2003-10-01 00:00:00
abstract::Focal infections that are caused by antibiotic-resistant bacteria are becoming an ever-growing challenge to human health. To address this challenge, a pH-responsive amphiphilic polymer of polyaniline-conjugated glycol chitosan (PANI-GCS) that can self-assemble into nanoparticles (NPs) in situ is developed. The PANI-GC...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2016.11.045
更新日期:2017-02-01 00:00:00
abstract::Membranes of 75% and 100% benzyl hyaluronate esters (percentage of total carboxylate groups esterified) were prepared and their water vapour, oxygen and carbon dioxide transmission rates determined. The values of these properties were compared with the values obtained for several commercial wound dressings under the s...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/0142-9612(95)00324-x
更新日期:1996-08-01 00:00:00
abstract::Characterization of complex adsorbed protein films is a critical aspect of biomaterials science, particularly in understanding the in vivo response to biomaterials. The surface analysis techniques electron spectroscopy for chemical analysis (ESCA) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) are parti...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/s0142-9612(02)00612-9
更新日期:2003-05-01 00:00:00
abstract::Tumor-homing cytotoxic stem cell (SC) therapy is a promising new approach for treating the incurable brain cancer glioblastoma (GBM). However, problems of retaining cytotoxic SCs within the post-surgical GBM resection cavity are likely to significantly limit the clinical utility of this strategy. Here, we describe a n...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2016.01.007
更新日期:2016-04-01 00:00:00
abstract::Restoration of tissue integrity and tissue function of wounded skin are both essential for wound repair and regeneration, while synergistic promotion of the two remains elusive. Since elevated reactive oxygen species (ROS) production in the injured site has been implicated in triggering a set of deleterious effects su...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2017.10.018
更新日期:2018-01-01 00:00:00
abstract::Synthetic small interfering RNA (siRNA) is a class of therapeutic entities that allow for specific silencing of target genes via RNA interference (RNAi) and comprise an enormous clinical potential for a variety of diseases, including cancer. However, efficient tissue-specific delivery of siRNA remains the major limita...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2015.11.004
更新日期:2016-01-01 00:00:00
abstract::The therapeutic efficacy of nanoscale anticancer drug delivery systems is severely truncated by their low tumor-targetability and inefficient drug release at the target site. Here, we report the design and development of novel endosomal pH-activatable paclitaxel prodrug micelles based on hyaluronic acid-b-dendritic ol...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2016.01.049
更新日期:2016-04-01 00:00:00