Abstract:
:Photoacoustic tomography (PAT) also referred to as optoacoustic tomography (OAT) is a hybrid imaging modality that employs nonionizing optical radiation and ultrasonic detection. Here, we describe the application of a new class of optical contrast agents based on mesoscopic hollow gold nanospheres (HAuNS) to PAT. HAuNS are approximately 40 nm in diameter with a hollow interior and consist of a thin gold wall. They display strong resonance absorption tuned to the near-infrared (NIR) range, with an absorption peak at 800 nm, whose photoacoustic efficiency is significantly greater than that of blood. Following surface conjugation with thiolated poly(ethylene glycol), the pegylated HAuNS (PEG-HAuNS) had distribution and elimination half-lives of 1.38 +/- 0.38 and 71.82 +/- 30.46 h, respectively. Compared with PAT images based on the intrinsic optical contrast in nude mice, the PAT images acquired within 2 h after intravenous administration of PEG-HAuNS showed the brain vasculature with greater clarity and detail. The image depicted brain blood vessels as small as approximately 100 mum in diameter using PEG-HAuNS as contrast agents. Preliminary results showed no acute toxicity to the liver, spleen, or kidneys in mice following a single imaging dose of PEG-HAuNS. Our results indicate that PEG-HAuNS are promising contrast agents for PAT, with high spatial resolution and enhanced sensitivity.
journal_name
Biomaterialsjournal_title
Biomaterialsauthors
Lu W,Huang Q,Ku G,Wen X,Zhou M,Guzatov D,Brecht P,Su R,Oraevsky A,Wang LV,Li Cdoi
10.1016/j.biomaterials.2009.12.007subject
Has Abstractpub_date
2010-03-01 00:00:00pages
2617-26issue
9eissn
0142-9612issn
1878-5905pii
S0142-9612(09)01366-0journal_volume
31pub_type
杂志文章相关文献
BIOMATERIALS文献大全abstract::Cell-intrinsic reporters such as luciferase (LUC) and red fluorescent protein (RFP) have been commonly utilized in preclinical studies to image tumor growth and to monitor therapeutic responses. While extrinsic reporters that emit near infrared I (NIR-I: 650-950 nm) or near-infrared II (NIR-II: 1000-1700 nm) optical s...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2017.04.046
更新日期:2017-07-01 00:00:00
abstract::Peripheral nerve injuries often lead to incomplete recovery and contribute to significant disability to approximately 360,000 people in the USA each year. Stem cell therapy holds significant promise for peripheral nerve regeneration, but maintenance of stem cell viability and differentiation potential in vivo are stil...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2018.07.015
更新日期:2018-10-01 00:00:00
abstract::The development of electrospun ultrafine fibres from biodegradable and biocompatible polymers has created exciting opportunities for biomedical applications. Fibre meshes with high surface area, suitable porosity and stiffness have been produced. Despite desirable structural and topographical properties, for most synt...
journal_title:Biomaterials
pub_type: 杂志文章,评审
doi:10.1016/j.biomaterials.2016.08.011
更新日期:2016-11-01 00:00:00
abstract:UNLABELLED:Scarcity of donor tissue to treat corneal blindness and the need to deliver stem cells or pharmacologic agents to ensure corneal graft survival are major challenges. Here, new composite collagen-based hydrogels are developed as implants to restore corneal transparency while serving as a possible reservoir fo...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2016.01.004
更新日期:2016-03-01 00:00:00
abstract::A two-layer hydroxyapatite (HA)/HA+TiO(2) bond coat composite coating (HTH coating) on titanium was fabricated by plasma spraying. The HA+TiO(2) bond coat (HTBC) consists of 50 vol% HA and 50 vol% TiO(2) (HT). The microstructural characterization of the HTH coatings before and after heat treatment was conducted by usi...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2003.10.092
更新日期:2004-08-01 00:00:00
abstract::Biological processes are of great significance for the normal physiological functions of living organisms and closely related to the health. Monitoring of biological processes and diagnosis of diseases based on fluorescent techniques would provide comprehensive insight into mechanism of life and pathogenesis of diseas...
journal_title:Biomaterials
pub_type: 杂志文章,评审
doi:10.1016/j.biomaterials.2017.09.004
更新日期:2017-11-01 00:00:00
abstract::Hydrogels are commonly used as artificial extracellular matrices for 3D cell culture and for tissue engineering. Viscoelastic hydrogels with tunable stress relaxation have recently been developed, and stress relaxation in the hydrogels has been found to play a key role in regulating cell behaviors such as differentiat...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2019.02.004
更新日期:2019-04-01 00:00:00
abstract::Pancreatic ductal adenocarcinoma (PDAC) is characterized by a prominent desmoplastic/stromal reaction, which contributes to the poor clinical outcome of this disease. Therefore, greater understanding of the stroma development and tumor-stroma interactions is highly required. Pancreatic stellate cells (PSC) are myofibr...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2016.08.041
更新日期:2016-11-01 00:00:00
abstract::Anti-angiogenic therapeutics has been investigated extensively for the treatment of retinal and choroidal vascular diseases, and diabetic retinopathy. Anti-Flt1 peptide of GNQWFI is an antagonistic peptide for vascular endothelial growth factor receptor 1 (VEGFR1 or Flt1) inhibiting VEGFR1-mediated endothelial cell mi...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2011.01.003
更新日期:2011-04-01 00:00:00
abstract::In arterial replacement there is a clear clinical need for a functional substitute possessing appropriate haemocompatible properties to be implanted as small diameter artery. Endothelial cell seeding constitutes an appreciated method to improve blood compatibility on the condition that cells firmly adhere to the suppo...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2013.07.091
更新日期:2013-12-01 00:00:00
abstract::Chondrocytes isolated from human foetal epiphyseal cartilage were seeded dynamically into polyglycolic acid (PGA) scaffolds and cultured in recirculation column bioreactors to produce tissue-engineered cartilage. Several culture techniques with the potential to provide endogenous growth factors and other conditions be...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2005.04.062
更新日期:2005-12-01 00:00:00
abstract::Block copolymer prodrugs (BCPs) have attracted considerable attentions in clinical translation of nanomedicine owing to their self-assembly into well-defined core-shell nanoparticles for improved pharmacokinetics, stability in blood circulation without drug leakage, and optimized biodistribution. However, a cascade of...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2017.11.006
更新日期:2018-02-01 00:00:00
abstract::6-O-Carboxymethylchitin (CM-chitin) was partially deacetylated by alkaline treatment, and the 30% deacetylated product was named CM-DA30 and used for the preparation of microspheres. An aqueous solution of CM-DA30 was added to hexane containing 1% (w/w) sorbitan sesquioleate and emulsified by stirring and sonication, ...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/s0142-9612(00)00069-7
更新日期:2000-09-01 00:00:00
abstract::Thermosensitive hydrogels based on poly(γ-ethyl-L-glutamate)-poly(ethylene glycol)-poly(γ-ethyl-L-glutamate) triblock copolymers (PELG-PEG-PELG) were prepared for localized and sustained delivery of anticancer drugs. The polypeptide-based hydrogels showed much lower critical gelation concentration than the traditional...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2013.09.064
更新日期:2013-12-01 00:00:00
abstract::To understand the effect of photosensitizer (PS) release from graft copolymer based micelles in photodynamic therapy (PDT), the two pH-sensitive and non-pH-sensitive graft copolymers, (poly(N-vinyly caprolactam)-g-poly(D,L-lactide) and poly(N-vinyly caprolactam-co-N-vinyl imidazole)-g-poly(D,L-lactide)), were synthesi...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2011.11.014
更新日期:2012-02-01 00:00:00
abstract::Fracture healing and fracture fixation in the context of osteoporosis is extremely difficult. To inhibit osteoclast-induced bone resorption and associated implant loosening in this pathology, we describe a local delivery strategy to delivery RNA interfering technology to bone sites to target and down-regulate osteocla...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2012.07.039
更新日期:2012-11-01 00:00:00
abstract::Microcontact printing (mCP) is employed to generate discontinuous microscale gradients of active fractalkine, a chemokine expressed by endothelial cells near sites of inflammation where it is believed to form concentration gradients descending away from the inflamed area. In vivo, fractalkine is a transmembrane molecu...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2009.06.018
更新日期:2009-10-01 00:00:00
abstract::The continuous release of nitric oxide (NO) by the native endothelium of blood vessels plays a substantial role in the cardiovascular physiology, as it influences important pathways of cardiovascular homeostasis, inhibits vascular smooth muscle cell (VSMC) proliferation, inhibits platelet activation and aggregation, a...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2015.06.016
更新日期:2015-09-01 00:00:00
abstract::Impurity centers associated with silicon have been observed in the phase mixture of silicon substituted apatite (Si-Ap) and silicon stabilized tricalcium phosphate (Si-TCP) using electron spin resonance (ESR). Two unique centers occur upon addition of SiO2 to the calcium phosphate system: an orthorhombic center with g...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2004.10.013
更新日期:2005-06-01 00:00:00
abstract::As part of a study of elicited angiogenesis, hyaluronan (HA)-based hydrogels crosslinked by polyethylene glycol diacrylate (PEGDA) were loaded with combinations of the cytokine growth factors vascular endothelial growth factor (VEGF), angiopoietin-1 (Ang-1), keratinocyte growth factor (KGF) and platelet-derived growth...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2010.02.043
更新日期:2010-06-01 00:00:00
abstract::A nanohybrid vesicle was developed from cholesteryl succinyl silane(CSS) in combination of sol-gel process and self-assembly technique. The silicalike surface adds CSS vesicles remarkably high stability against destabilization in blood or leakage of drug cargos. It was found that CSS vesicles alone exhibited selective...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2011.08.043
更新日期:2011-12-01 00:00:00
abstract::Effective global control of tuberculosis (TB) is increasingly threatened by the convergence of multidrug-resistant TB and the human immunodeficiency virus (HIV) infection. TB/HIV coinfections exert a tremendous burden on the host's immune system, and this has prompted the clinical use of immunomodulators to enhance ho...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2013.12.049
更新日期:2014-03-01 00:00:00
abstract::There is extensive experimental and surgical experience with the use of bone tissue to fill defects in the skeleton, to bridge non-union sites, and to pack defects in bone created from cyst curettage. DP-bioactive glass with a chemical composition of Na2O 8.4%, SiO2 39.6%, P2O5 12% and CaO 40% has been reported as an ...
journal_title:Biomaterials
pub_type: 杂志文章
doi:
更新日期:1994-10-01 00:00:00
abstract::Glioblastoma (GBM) is the deadliest and most common type of primary brain tumor in adults with a grim prognosis despite multimodal treatments. Dendritic cell (DC)-based immunotherapy has emerged as a promising therapeutic modality for GBM, whose efficacy is nonetheless fundamentally undermined by GBM-induced immunosup...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2018.07.035
更新日期:2018-10-01 00:00:00
abstract::Suture materials may interact with immune competent cells and thereby affect localized immunity. Macrophages are central to the inflammatory response and coordinate wound healing. They are also involved in the clearance of foreign material, bacteria and malignant cells. We studied the influence of soluble factors asso...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/0142-9612(95)93852-5
更新日期:1995-03-01 00:00:00
abstract::D-α-tocopheryl polyethylene glycol succinate (Vitamin E TPGS, or simply TPGS) is a water-soluble derivative of natural Vitamin E, which is formed by esterification of Vitamin E succinate with polyethylene glycol (PEG). As such, it has advantages of PEG and Vitamin E in application of various nanocarriers for drug deli...
journal_title:Biomaterials
pub_type: 杂志文章,评审
doi:10.1016/j.biomaterials.2012.03.046
更新日期:2012-06-01 00:00:00
abstract::We report a new template-directed method for the fabrication of hydroxyapatite (HAp) sponges by using amino-acid-coated HAp nanoparticles dispersed within a viscous polysaccharide (dextran sulfate) matrix, and describe the use of these materials for the viability and proliferation of human bone marrow stromal cells. T...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2005.04.037
更新日期:2005-11-01 00:00:00
abstract::Biomaterials interface with toll-like receptor (TLR) 9-mediated innate immunity in a wide range of medical applications, such as tissue implants and drug delivery systems. The stimulation of TLR9 can lead to two different signaling pathways, resulting in the generation of proinflammatory cytokines (i.e. IL-6) and/or t...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2010.10.059
更新日期:2011-02-01 00:00:00
abstract::Vesicoureteral reflux and urinary incontinence can be treated by endoscopic injection. Injectables such as collagen and hyaluronic acid-dextranomer are commonly used, however are not offering optimal therapeutic effect yet. In the present study a novel application for poly(acrylonitrile)-based hydrogel (Hypan), alread...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2006.09.019
更新日期:2007-02-01 00:00:00
abstract::In this study, the behavior of neural stem cells from embryonic rat cerebral cortex were compared on the chitosan and poly(vinylidene fluoride) (PVDF) substrates at single-cell and neurosphere level. It was found that chitosan and PVDF substrates inhibited the proliferation and differentiation of single neural stem ce...
journal_title:Biomaterials
pub_type: 杂志文章
doi:10.1016/j.biomaterials.2006.04.021
更新日期:2006-09-01 00:00:00