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https://www.readbyqxmd.com/read/28524656/multifunctional-and-redox-responsive-self-assembled-magnetic-nanovectors-for-protein-delivery-and-dual-modal-imaging
#1
Hong Yu Yang, Moon-Sun Jang, Yi Li, Jung Hee Lee, Doo Sung Lee
Nanoparticle (NP)-based model carriers present an emerging strategy for protein delivery. However, constructing a multifunctional nanocarrier with high loading capacity, diagnostic imaging capacity and controlled release capability is a tremendous challenge for protein delivery systems. Thus, we herein report on the fabrication of redox-responsive magnetic nanovectors (termed RMNs) through self- assembly of Fe3O4 NPs and redox-responsive polymer ligands, which could effectively transport protein and trigger intracellular protein release...
May 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28513559/detecting-and-discriminating-shigella-sonnei-using-an-aptamer-based-fluorescent-biosensor-platform
#2
Myeong-Sub Song, Simranjeet Singh Sekhon, Woo-Ri Shin, Hyung Cheol Kim, Jiho Min, Ji-Young Ahn, Yang-Hoon Kim
In this paper, a Whole-Bacteria SELEX (WB-SELEX) strategy was adopted to isolate specific aptamers against Shigella sonnei. Real-time PCR amplification and post-SELEX experiment revealed that the selected aptmers possessed a high binding affinity and specificity for S. sonnei. Of the 21 aptamers tested, the C(t) values of the SS-3 and SS-4 aptamers (Ct = 13.89 and Ct = 12.23, respectively) had the lowest value compared to other aptamer candidates. The SS-3 and SS-4 aptamers also displayed a binding affinity (KD) of 39...
May 17, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28503066/essential-oil-mediated-glycerosomes-increase-transdermal-paeoniflorin-delivery-optimization-characterization-and-evaluation-in-vitro-and-in-vivo
#3
Kai Zhang, Yongtai Zhang, Zhe Li, Nana Li, Nianping Feng
In this study, a novel glycerosome carrier containing essential oils was prepared for topical administration of paeoniflorin (PF) to enhance its transdermal drug delivery and improve drug absorption in the synovium. The formulation of glycerosomes was optimized by a uniform design, and the final vehicle was composed of 5% (w/v) phospholipid, 0.6% (w/v) cholesterol, and 10% (v/v) glycerol, with 2% (v/v) Speranskia tuberculata essential oil (STO) as the transdermal enhancer. The in vitro transdermal flux of PF loaded in the STO-glycerosomes was 1...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28480924/a-comparative-study-of-plasmonic-enhanced-single-molecule-fluorescence-induced-by-gold-nanoantennas-and-its-application-for-illuminating-telomerase
#4
Caixia Niu, Manshu Peng, Ying You, Ruihua Wang, Yijing Jia, Tianxin Xie, Jinyu Wang, Na Na, Jin Ouyang
A comparative study of plasmonic-enhanced single-molecule fluorescence (PESMF) induced by four gold nanoantennas is reported. The gold triangular nanoplate (Au TNP) is the optimal PESMF substrate for Cy5.5 owing to its sharpest point and strongest electric fields. The Au TNP is chosen for the preparation of a telomerase sensor.
May 8, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28442407/light-magnetic-hyperthermia-triggered-drug-released-from-multi-functional-thermo-sensitive-magnetoliposomes-for-precise-cancer-synergetic-theranostics
#5
Yuxin Guo, Yang Zhang, Jinyuan Ma, Qi Li, Yang Li, Xinyi Zhou, Dan Zhao, Hua Song, Qing Chen, Xuan Zhu
Precise delivery of antineoplastic drugs to specific tumor region has drawn much attention in recent years. Herein, a light/magnetic hyperthermia triggered drug delivery with multiple functionality is designed based on methotrexate (MTX) modified thermo-sensitive magnetoliposomes (MTX-MagTSLs). In this system, MTX and oleic acid modified magnetic nanoparticles (MNPs) can be applied in biological and magnetic targeting. Meanwhile, lipophilic fluorescent dye Cy5.5 and MNPs are encapsulated into the bilayer of liposomes, which can not only achieve dual-imaging effect to verify the MTX-MagTSLs accumulation in tumor region, but also provide an appropriate laser irradiation region to release Doxorubicin (Dox) under alternating magnetic field (AMF)...
April 22, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28411450/activatable-near-infrared-dye-conjugated-hyaluronic-acid-based-nanoparticles-as-a-targeted-theranostic-agent-for-enhanced-fluorescence-ct-photoacoustic-imaging-guided-photothermal-therapy
#6
Xiaolong Liang, Lei Fang, Xiaoda Li, Xu Zhang, Fan Wang
Targeted theranostic nano-system integrating functions of both diagnosis and therapy shows great potential for improving diagnosis and therapeutic efficacy. Herein, multifunctional nanoparticle based on activatable hyaluronic acid (HA) conjugating two near-infrared (NIR) dyes of Cy5.5 and IR825 was successfully designed and fabricated, and simultaneously used as a carrier for encapsulating perfluorooctylbromide (PFOB). In this system, PFOB showed good capability to absorb the X-rays, Cy5.5 on the outer surface acted as a fluorescent dye activatable by hyaluronidases (Hyals) in the tumor, and IR825 in the core as a photothermal agent...
July 2017: Biomaterials
https://www.readbyqxmd.com/read/28385630/targetability-of-hyaluronic-acid-nanogel-to-cancer-cells-in-vitro-and-in-vivo-studies
#7
S S Pedrosa, P Pereira, A Correia, F M Gama
We have, in previous work developed, characterized and evaluated the biocompatibility of an engineered hyaluronic acid nanogel. Here we assess the targetability of a hyaluronic acid nanogel towards CD44 overexpressing cells, in vitro and in vivo. Results obtained by flow cytometry and confocal fluorescence microscopy shows that nanogel is greatly internalized by non-small cancer lung cells (A549 cells), that overexpress CD44 receptors. The biodistribution and tumor targetability of the nanogel labelled with a near-infrared (NIR) probe were performed, in mice, through a non-invasive imaging system...
April 4, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28366468/selective-localization-of-a-novel-dendrimer-nanoparticle-in-myocardial-ischemia-reperfusion-injury
#8
J Trent Magruder, Todd C Crawford, Yi-An Lin, Fan Zhang, Joshua C Grimm, Rangaramanujam M Kannan, Sujatha Kannan, Christopher M Sciortino
BACKGROUND: Dendrimer nanoparticle therapies represent promising new approaches to drug delivery, particularly in diseases associated with inflammatory injury. However, their application has not been fully explored in models of acute myocardial ischemia (MI) and reperfusion injury. METHODS: White male New Zealand rabbits underwent left thoracotomy with 30-minute temporary left anterior descending artery occlusion and MI confirmed by electrocardiography and histology (MI rabbits, n = 9), or left thoracotomy and pericardial opening for 30 minutes but no left anterior descending artery occlusion (control [C] rabbits, n = 9) rabbits...
March 30, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28359811/delivery-of-doxorubicin-loaded-plga-nanoparticles-into-u87-human-glioblastoma-cells
#9
Yulia Malinovskaya, Pavel Melnikov, Vladimir Baklaushev, Anna Gabashvili, Nadezhda Osipova, Sergey Mantrov, Yulia Ermolenko, Olga Maksimenko, Marina Gorshkova, Vadim Balabanyan, Jörg Kreuter, Svetlana Gelperina
The paramount problem in the therapy of brain tumors is the inability of most drugs to cross the blood-brain barrier. PLGA nanoparticles overcoated with poloxamer 188 could overcome this problem and enabled a high anti-tumoral effect against the very aggressive intracranial 101.8 glioblastoma in rats that closely resembles human grade IV glioblastomas. The basis for the transport of these particles across the blood-brain barrier appears to be adsorption of blood apolipoproteins (ApoE or ApoA-I) on the nanoparticle surface caused by the poloxamer 188-coating, followed by receptor-mediated transcytosis of the nanoparticles...
March 27, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28352174/octanoyl-galactose-ester-modified-microemulsion-system-self-assembled-by-coix-seed-components-to-enhance-tumor-targeting-and-hepatoma-therapy
#10
Ding Qu, Mingjian Liu, Mengmeng Huang, Lixiang Wang, Yan Chen, Congyan Liu, Yuping Liu
A nanosized drug delivery platform with a combination of rational components and tumor targeting is significant for enhancement of anticancer therapy and reduction of side effects. In this study, we developed a octanoyl galactose ester-modified microemulsion system self-assembled by coix seed components (Gal(oct)-C-MEs), which improved the tumor accumulation through asialoglycoprotein receptor-mediated endocytosis and promoted the antitumor efficacy through multicomponent-mediated synergistic effect. Octanoyl galactose ester (Gal(oct)) with a yield of 82...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28350351/assembly-of-iron-oxide-nanocubes-for-enhanced-cancer-hyperthermia-and-magnetic-resonance-imaging
#11
Minjung Cho, Antonio Cervadoro, Maricela R Ramirez, Cinzia Stigliano, Audrius Brazdeikis, Vicki L Colvin, Pierluigi Civera, Jaehong Key, Paolo Decuzzi
Multiple formulations of iron oxide nanoparticles (IONPs) have been proposed for enhancing contrast in magnetic resonance imaging (MRI) and for increasing efficacy in thermal ablation therapies. However, insufficient accumulation at the disease site and low magnetic performance hamper the clinical application of IONPs. Here, 20 nm iron oxide nanocubes were assembled into larger nanoconstructs externally stabilized by a serum albumin coating. The resulting assemblies of nanocubes (ANCs) had an average diameter of 100 nm and exhibited transverse relaxivity (r₂ = 678...
March 28, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28288894/endogenous-inspired-biomineral-installed-hyaluronan-nanoparticles-as-ph-responsive-carrier-of-methotrexate-for-rheumatoid-arthritis
#12
Md Mahmudul Alam, Hwa Seung Han, Shijin Sung, Jin Hee Kang, Keum Hee Sa, Hasan Al Faruque, Jungwan Hong, Eon Jeong Nam, In San Kim, Jae Hyung Park, Young Mo Kang
Methotrexate (MTX), an anchor drug for rheumatoid arthritis (RA), has been suffered from refractoriness and high toxicity limiting effective dosage. To mitigate these challenges, the ability to selectively deliver MTX to arthritis tissue is a much sought-after modality for the treatment of RA. In this study, we prepared mineralized nanoparticles (MP-HANPs), composed of PEGylated hyaluronic acid (P-HA) as the hydrophilic shell, 5β-cholanic acid as the hydrophobic core, and calcium phosphate (CaP) as the pH-responsive mineral...
March 11, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28257990/extracellular-matrix-remodeling-in-vivo-for-enhancing-tumor-targeting-efficiency-of-nanoparticle-drug-carriers-using-the-pulsed-high-intensity-focused-ultrasound
#13
Sangmin Lee, Hyounkoo Han, Heebeom Koo, Jin Hee Na, Hong Yeol Yoon, Kyung Eun Lee, Hyukjin Lee, Hyuncheol Kim, Ick Chan Kwon, Kwangmeyung Kim
Dense and stiff extracellular matrix (ECM) in heterogeneous tumor tissues can inhibit deep penetration of nanoparticle drug carriers and decreases their therapeutic efficacy. Herein, we suggest the ECM remodeling strategy by the pulsed high intensity focused ultrasound (Pulsed-HIFU) technology for enhanced tumor-targeting of nanoparticles. First, we clearly observed that the tumor-targeting efficacy and tissue penetration of intravenously injected Cy5.5-labled glycol chitosan nanoparticles (Cy5.5-CNPs) were greatly inhibited in tumor tissue containing high collagen and hyaluronan contents in ECM-rich A549 tumor-bearing mice, compared to in ECM-less SCC7...
February 28, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28252391/visualizing-epithelial-expression-in-vertical-and-horizontal-planes-with-dual-axes-confocal-endomicroscope-using-compact-distal-scanner
#14
Gaoming Li, Haijun Li, Xiyu Duan, Quan Zhou, Juan Zhou, Thomas Wang
The epithelium is a thin layer of tissue that lines hollow organs, such as colon. Visualizing in vertical cross-sections with sub-cellular resolution is essential to understanding early disease mechanisms that progress naturally in the plane perpendicular to the tissue surface. The dual axes confocal architecture collects optical sections in tissue by directing light at an angle incident to the surface using separate illumination and collection beams to reduce effects of scattering, enhance dynamic range, and increase imaging depth...
February 23, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28247764/application-of-spectral-crosstalk-correction-for-improving-multiplexed-microrna-detection-using-a-single-excitation-wavelength
#15
Yuanjian Liu, Min Wei, Ying Li, Anran Liu, Wei Wei, Yuanjian Zhang, Songqin Liu
MicroRNAs (miRNAs) play crucial roles in the regulation of cellular activities and are next-generation biomarkers for early cancer detection. Simultaneous monitoring of multiplexed miRNA is very important for enhancing the accuracy of cancer diagnostics. Traditional fluorescence methods for multicomponent analysis were usually operated under multiple excitation wavelengths, because spectral crosstalk is very detrimental to detecting accuracy for multicomponent analysis. Herein, we present a fluorescence strategy for multi-miRNAs detection in plasma under a single excitation wavelength...
March 10, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28179099/hydrophobically-modified-polysaccharide-based-on-polysialic-acid-nanoparticles-as-carriers-for-anticancer-drugs
#16
Bom Jung, Man-Kyu Shim, Min-Ju Park, Eun Hyang Jang, Hong Yeol Yoon, Kwangmeyung Kim, Jong-Ho Kim
This study presented the development of hydrophobically modified polysialic acid (HPSA) nanoparticles, a novel anticancer drug nanocarrier that increases therapeutic efficacy without causing nonspecific toxicity towards normal cells. HPSA nanoparticles were prepared by 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC)/N-hydroxysuccinimide (NHS) coupling between N-deacetylated polysialic acid (PSA) and 5β-cholanic acid. The physicochemical characteristics of HPSA nanoparticles (zeta-potential, morphology and size) were measured, and in vitro cytotoxicity and cellular uptake of PSA and HPSA nanoparticles were tested in A549 cells...
February 4, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28167355/development-of-a-new-bioactivatable-fluorescent-probe-for-quantification-of-apolipoprotein-a-i-proteolytic-degradation-in%C3%A2-vitro-and-in%C3%A2-vivo
#17
Foued Maafi, Baoqiang Li, Catherine Gebhard, Mathieu R Brodeur, Walid Nachar, Louis Villeneuve, Frédéric Lesage, David Rhainds, Eric Rhéaume, Jean-Claude Tardif
BACKGROUND AND AIMS: The potential benefits of high-density lipoproteins (HDL) against atherosclerosis are attributed to its major protein component, apolipoprotein A-I (apoA-I). Most of the apoA-I in the vascular wall appears to be in its lipid-poor form. The latter, however, is subjected to degradation by proteases localized in atherosclerotic plaques, which, in turn, has been shown to negatively impact its atheroprotective functions. Here, we report the development and in vivo use of a bioactivatable near-infrared full-length apoA-I-Cy5...
March 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28150208/designing-multicomponent-nanosystems-for-rapid-detection-of-circulating-tumor-cells
#18
Shashwat S Banerjee, Vrushali Khobragade, Jayant Khandare
Detection of circulating tumor cells (CTCs) in the blood circulation holds immense promise as it predicts the overall probability of patient survival. Therefore, CTC-based technologies are gaining prominence as a "liquid biopsy" for cancer diagnostics and prognostics. Here, we describe the design and synthesis of two distinct multicomponent magnetic nanosystems for rapid capture and detection of CTCs. The multifunctional Magneto-Dendrimeric Nano System (MDNS) composed of an anchoring dendrimer that is conjugated to multiple agents such as near infrared (NIR) fluorescent cyanine 5 NHS (Cy5), glutathione (GSH), transferrin (Tf), and iron oxide (Fe3O4) magnetic nanoparticle (MNP) for simultaneous tumor cell-specific affinity, multimodal high resolution confocal imaging, and cell isolation...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28116362/a-rapid-albumin-binding-5-fluorouracil-prodrug-with-a-prolonged-circulation-time-and-enhanced-antitumor-activity
#19
Dongyang Zhao, Huicong Zhang, Wenhui Tao, Wei Wei, Jin Sun, Zhonggui He
5-Fluorouracil (5-FU) is an antimetabolite widely used in the treatment of a variety of solid tumors. However, its clinical applications are greatly hindered by a very short residence time in blood circulation and non-specific distribution in the body. In order to overcome these challenges, 1-alkylcarbonyloxymethyl 5-FU was designed and linked with a maleimide group to form an albumin-binding 5-FU prodrug, named EMC-5-FU. In vitro incubation with bovine serum albumin (BSA) and fresh rat blood proved that the prodrug bound rapidly to cysteine-34 to form the drug-albumin conjugate nanomedicine...
January 24, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28098756/detection-of-the-vascular-endothelial-growth-factor-with-a-novel-bioluminescence-resonance-energy-transfer-pair-using-a-two-component-system
#20
Tobias Wimmer, Eva Schroeter, Birgit Lorenz, Knut Stieger
In this paper we describe a two-component BRET (bioluminescence resonance energy transfer)-based method to detect vascular endothelial growth factor (VEGF) molecules in unknown samples as the basis for subsequent in vivo use. A luminescent VEGF binding molecule, which binds in the receptor binding motif of VEGF, is used as the energy donor, transferred to a fluorophore-coupled VEGF binding molecule (acceptor), which binds to the neuropilin binding motif of VEGF, thus enabling energy transfer from the donor to the acceptor molecule...
January 13, 2017: Sensors
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