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Journal of Nanobiotechnology

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https://www.readbyqxmd.com/read/30219060/bar-encapsulated-nanoparticles-for-the-inhibition-and-disruption-of-porphyromonas-gingivalis-streptococcus-gordonii-biofilms
#1
Mohamed Y Mahmoud, Donald R Demuth, Jill M Steinbach-Rankins
BACKGROUND: Porphyromonas gingivalis adherence to oral streptococci is a key point in the pathogenesis of periodontal diseases (Honda in Cell Host Microbe 10:423-425, 2011). Previous work in our groups has shown that a region of the streptococcal antigen denoted BAR (SspB Adherence Region) inhibits P. gingivalis/S. gordonii interaction and biofilm formation both in vitro and in a mouse model of periodontitis (Daep et al. in Infect Immun 74:5756-5762, 2006; Daep et al. in Infect immun 76:3273-3280, 2008; Daep et al...
September 15, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/30219059/impact-of-nanoparticle-surface-functionalization-on-the-protein-corona-and-cellular-adhesion-uptake-and-transport
#2
Ashraf Abdelkhaliq, Meike van der Zande, Ans Punt, Richard Helsdingen, Sjef Boeren, Jacques J M Vervoort, Ivonne M C M Rietjens, Hans Bouwmeester
BACKGROUND: Upon ingestion, nanoparticles can interact with the intestinal epithelial barrier potentially resulting in systemic uptake of nanoparticles. Nanoparticle properties have been described to influence the protein corona formation and subsequent cellular adhesion, uptake and transport. Here, we aimed to study the effects of nanoparticle size and surface chemistry on the protein corona formation and subsequent cellular adhesion, uptake and transport. Caco-2 intestinal cells, were exposed to negatively charged polystyrene nanoparticles (PSNPs) (50 and 200 nm), functionalized with sulfone or carboxyl groups, at nine nominal concentrations (15-250 μg/ml) for 10 up to 120 min...
September 15, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/30217198/lipid-nanoparticles-loading-triptolide-for-transdermal-delivery-mechanisms-of-penetration-enhancement-and-transport-properties
#3
Yongwei Gu, Meng Yang, Xiaomeng Tang, Ting Wang, Dishun Yang, Guangxi Zhai, Jiyong Liu
BACKGROUND: In recent years, nanoparticles (NPs) including nanostructured lipid carries (NLC) and solid lipid nanoparticles (SLN) captured an increasing amount of attention in the field of transdermal drug delivery system. However, the mechanisms of penetration enhancement and transdermal transport properties of NPs are not fully understood. Therefore, this work applied different platforms to evaluate the interactions between skin and NPs loading triptolide (TPL, TPL-NLC and TPL-SLN)...
September 15, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/30205822/pluronic-based-nano-self-assemblies-of-bacitracin-a-with-a-new-mechanism-of-action-for-an-efficient-in-vivo-therapeutic-effect-against-bacterial-peritonitis
#4
Wei Hong, Lipeng Liu, Yining Zhao, Yinghui Liu, Dexian Zhang, Mingchun Liu
BACKGROUND: Although assemblies of hydrophobic-modified bacitracin A with PLGA (Nano-BAPLGA ) have demonstrated promising antibacterial activities against both Gram-positive and Gram-negative bacteria, the desirable antibacterial potency has remained challenging due to the low solubility of Nano-BAPLGA . To address this tissue, a series of Pluronic copolymers (Pluronic® F127, Pluronic® P123 and Pluronic® P85) were selected to link the N-terminus of bacitracin A to construct Pluronic-based nano-self assemblies (Nano-BAF127 , Nano-BAP123 and Nano-BAP85 )...
September 11, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/30205821/a-micro-nano-chip-and-quantum-dots-based-3d-cytosensor-for-quantitative-analysis-of-circulating-tumor-cells
#5
Xuan Wu, Tingyu Xiao, Zhang Luo, Rongxiang He, Yiping Cao, Zhenzhong Guo, Weiying Zhang, Yong Chen
BACKGROUND: Due to the high transfer ability of cancer cell, cancer has been regarded as a world-wide high mortality disease. Quantitative analysis of circulating tumor cells (CTCs) can provide some valuable clinical information that is particularly critical for cancer diagnosis and treatment. Along with the rapid development of micro-/nano-fabrication technique, the three-dimensional (3D) bionic interface-based analysis method has become a hot research topic in the area of nanotechnology and life science...
September 11, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/30205820/protein-fishing-from-single-live-cells
#6
Elaheh Shekaramiz, Rupak Doshi, H Kumar Wickramasinghe
Intracellular protein and proteomic studies using mass spectrometry, imaging microscopy, flow cytometry, or western blotting techniques require genetic manipulation, cell permeabilization, and/or cell lysis. We present a biophysical method that employs a nanoaspirator to 'fish' native cytoplasmic or nuclear proteins from single mammalian cells, without compromising cell viability, followed by ex cellulo quantitative detection. Our work paves the way for spatiotemporally-controlled, quantitative, live, single-cell proteomics...
September 11, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/30176941/chitosan-functionalized-lipid-polymer-hybrid-nanoparticles-for-oral-delivery-of-silymarin-and-enhanced-lipid-lowering-effect-in-nafld
#7
Jun Liang, Ying Liu, Jinguang Liu, Zhe Li, Qiangyuan Fan, Zifei Jiang, Fei Yan, Zhi Wang, Peiwen Huang, Nianping Feng
BACKGROUND: Non-alcoholic fatty liver disease (NAFLD) is a chronic disease that causes excessive hepatic lipid accumulation. Reducing hepatic lipid deposition is a key issue in treatment and inhibition of NAFLD evolution. Silymarin is a potent hepatoprotective agent; however, it has low oral bioavailability due to its poor aqueous solubility and low membrane permeability. Unfortunately, few studies have addressed the development of convenient oral nanocarriers that can efficiently deliver silymarin to the liver and enhance its lipid-lowering effect...
September 4, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/30165861/a-new-nanoscale-transdermal-drug-delivery-system-oil-body-linked-oleosin-hegf-improves-skin-regeneration-to-accelerate-wound-healing
#8
Weidong Qiang, Tingting Zhou, Xinxin Lan, Xiaomei Zhang, Yongxin Guo, Muhammad Noman, Linna Du, Jie Zheng, Wenqing Li, Haoyang Li, Yubin Lu, Hongyu Wang, Lili Guan, Linbo Zhang, Xiaokun Li, Jing Yang, Haiyan Li
BACKGROUND: Epidermal growth factor (EGF) can promote cell proliferation as well as migration, which is feasible in tissue wound healing. Oil bodies have been exploited as an important platform to produce exogenous proteins. The exogenous proteins were expressed in oil bodies from plant seeds. The process can reduce purification steps, thereby significantly reducing the purification cost. Mostly, the diameter of oil body particle ranges between 1.0 and 1.5 µm in the safflower seeds, however, it reduces to 700-1000 nm in the transgenic safflower seeds...
August 30, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/30165853/nanosensors-based-on-polymer-vesicles-and-planar-membranes-a-short-review
#9
REVIEW
Mohamed El Idrissi, Claire Elsa Meyer, Luisa Zartner, Wolfgang Meier
This review aims to summarize the advance in the field of nanosensors based on two particular materials: polymer vesicles (polymersomes) and polymer planar membranes. These two types of polymer-based structural arrangements have been shown to be efficient in the production of sensors as their features allow to adapt to different environment but also to increase the sensitivity and the selectivity of the sensing device. Polymersomes and planar polymer membranes offer a platform of choice for a wide range of chemical functionalization and characteristic structural organization which allows a convenient usage in numerous sensing applications...
August 30, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/30165851/targeting-extracellular-vesicles-to-injured-tissue-using-membrane-cloaking-and-surface-display
#10
Travis J Antes, Ryan C Middleton, Kristin M Luther, Takeshi Ijichi, Kiel A Peck, Weixin Jane Liu, Jackie Valle, Antonio K Echavez, Eduardo Marbán
BACKGROUND: Extracellular vesicles (EVs) and exosomes are nano-sized, membrane-bound vesicles shed by most eukaryotic cells studied to date. EVs play key signaling roles in cellular development, cancer metastasis, immune modulation and tissue regeneration. Attempts to modify exosomes to increase their targeting efficiency to specific tissue types are still in their infancy. Here we describe an EV membrane anchoring platform termed "cloaking" to directly embed tissue-specific antibodies or homing peptides on EV membrane surfaces ex vivo for enhanced vesicle uptake in cells of interest...
August 30, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/30097010/functionalization-of-stable-fluorescent-nanodiamonds-towards-reliable-detection-of-biomarkers-for-alzheimer-s-disease
#11
Francisco Morales-Zavala, Nathalie Casanova-Morales, Raúl B Gonzalez, América Chandía-Cristi, Lisbell D Estrada, Ignacio Alvizú, Victor Waselowski, Fanny Guzman, Simón Guerrero, Marisol Oyarzún-Olave, Cristian Rebolledo, Enrique Rodriguez, Julien Armijo, Heman Bhuyan, Mario Favre, Alejandra R Alvarez, Marcelo J Kogan, Jerónimo R Maze
BACKGROUND: Stable and non-toxic fluorescent markers are gaining attention in molecular diagnostics as powerful tools for enabling long and reliable biological studies. Such markers should not only have a long half-life under several assay conditions showing no photo bleaching or blinking but also, they must allow for their conjugation or functionalization as a crucial step for numerous applications such as cellular tracking, biomarker detection and drug delivery. RESULTS: We report the functionalization of stable fluorescent markers based on nanodiamonds (NDs) with a bifunctional peptide...
August 10, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/30077180/cd11c-specific-bio-nanocapsule-enhances-vaccine-immunogenicity-by-targeting-immune-cells
#12
Hidenori Matsuo, Masaharu Somiya, Masumi Iijima, Takeshi Arakawa, Shun'ichi Kuroda
BACKGROUND: Various nanocarriers have been used to deliver subunit vaccines specifically to dendritic cells (DCs) for the improvement of immunogenicity. However, due to their insufficient DC priming ability, these vaccines could not elicit effective innate immunity. We have recently developed a DC-targeting bio-nanocapsule (BNC) by displaying anti-CD11c IgGs via protein A-derived IgG Fc-binding Z domain on the hepatitis B virus envelope L protein particles (α-DC-ZZ-BNC). RESULTS: After the chemical modification with antigens (Ags), the α-DC-ZZ-BNC-Ag complex could deliver Ags to DCs efficiently, leading to effective DC maturation and efficient endosomal escape of Ags, followed by Ag-specific T cell responses and IgG productions...
August 4, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/30060740/combination-of-nf-kb-targeted-sirna-and-methotrexate-in-a-hybrid-nanocarrier-towards-the-effective-treatment-in-rheumatoid-arthritis
#13
Weifeng Duan, Huan Li
BACKGROUND: The transcription factor NF-kB plays an important role in the pathogenesis of rheumatoid arthritis (RA). Effective treatment of RA is hindered due to the lack of specificity of small molecules in the inflamed joints. In this study, we aimed to develop a unique hybrid-nanoparticles system comprised of calcium phosphate/liposome to deliver NF-kB-targeted siRNA and methotrexate (MTX) to diseased site. RESULTS: We have successfully demonstrated that the combination of siRNA and MTX in a calcium phosphate/liposome-based hybrid nanocarrier could effectively treat the RA...
July 30, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/30012166/pegylated-self-assembled-enzyme-responsive-nanoparticles-for-effective-targeted-therapy-against-lung-tumors
#14
Fangyuan Guo, Jiangqing Wu, Wenchao Wu, Dongxue Huang, Qinying Yan, Qingliang Yang, Ying Gao, Gensheng Yang
BACKGROUND: Matrix-metalloproteinases, which are overexpressed in many types of cancer, can be applied to improve the bioavailability of chemotherapeutic drugs and guide therapeutic targeting. Thus, we aimed to develop enzyme-responsive nanoparticles based on a functionalized copolymer (mPEG-Peptide-PCL), which was sensitive to matrix metalloproteinase, as smart drug vesicles for enhanced biological specificity and reduced side effects. RESULTS: The rate of in vitro curcumin (Cur) release from Cur-P-NPs was not markedly accelerated in weakly acidic tumor microenvironment, indicating a stable intracellular concentration and a consistent therapeutic effect...
July 16, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/30005668/binding-mechanism-of-anti-cancer-chemotherapeutic-drug-mitoxantrone-to-dna-characterized-by-magnetic-tweezers
#15
Dennis Kreft, Ying Wang, Michael Rattay, Katja Toensing, Dario Anselmetti
BACKGROUND: Chemotherapeutic agents (anti-cancer drugs) are small cytostatic or cytotoxic molecules that often bind to double-stranded DNA (dsDNA) resulting in modifications of their structural and nanomechanical properties and thus interfering with the cell proliferation process. METHODS: We investigated the anthraquinone compound mitoxantrone that is used for treating certain cancer types like leukemia and lymphoma with magnetic tweezers as a single molecule nanosensor...
July 13, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29996877/chiral-polymer-modified-nanoparticles-selectively-induce-autophagy-of-cancer-cells-for-tumor-ablation
#16
Long Yuan, Fan Zhang, Xiaowei Qi, Yongjun Yang, Chang Yan, Jun Jiang, Jun Deng
BACKGROUND: Autophagy regulation through exogenous materials has aroused intensive attention to develop treatment protocols according to diverse human diseases. However, to the best of our knowledge, few examples have been reported to selectively control autophagy process and ultimately achieve efficient therapeutic potential. RESULTS: In this study, monolayers of poly (acryloyl-L, D and racemic valine) (L-PAV-AuNPs, D-PAV-AuNPs and L/D-PAV-AuNPs) chiral molecules were anchored on the surfaces of gold nanoparticles (PAV-AuNPs), and the subsequent chirality-selective effects on autophagy activation were thoroughly studied...
July 11, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29935539/small-size-fullerenol-nanoparticles-suppress-lung-metastasis-of-breast-cancer-cell-by-disrupting-actin-dynamics
#17
Yanxia Qin, Kui Chen, Weihong Gu, Xinghua Dong, Ruihong Lei, Yanan Chang, Xue Bai, Shibo Xia, Li Zeng, Jiaxin Zhang, Sihan Ma, Juan Li, Shan Li, Gengmei Xing
BACKGROUND: Tumor metastasis is the primary cause of mortality in cancer patients. Migratory breast cancer cells in lymphatic and blood vessels seek new sites and form metastatic colonies in the lung and bone, and then these cancer cells often wreak considerable havoc. With advances in nanotechnology, nanomaterials and nanotechnologies are widely applied in tumor therapy. In this paper, small size fullerenol nanoparticles, which are separated by isoelectric focusing electrophoresis (IFE) for discrepancy of isoelectric point (pI), are used in the study of tumor metastasis...
June 23, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29921300/food-grade-tio-2-is-trapped-by-intestinal-mucus-in-vitro-but-does-not-impair-mucin-o-glycosylation-and-short-chain-fatty-acid-synthesis-in-vivo-implications-for-gut-barrier-protection
#18
Pauline Talbot, Joanna M Radziwill-Bienkowska, Jasper B J Kamphuis, Karine Steenkeste, Sarah Bettini, Véronique Robert, Marie-Louise Noordine, Camille Mayeur, Eric Gaultier, Philippe Langella, Catherine Robbe-Masselot, Eric Houdeau, Muriel Thomas, Muriel Mercier-Bonin
BACKGROUND: Titanium dioxide (TiO2 ) particles are commonly used as a food additive (E171 in the EU) for its whitening and opacifying properties. However, the risk of gut barrier disruption is an increasing concern because of the presence of a nano-sized fraction. Food-grade E171 may interact with mucus, a gut barrier protagonist still poorly explored in food nanotoxicology. To test this hypothesis, a comprehensive approach was performed to evaluate in vitro and in vivo interactions between TiO2 and intestinal mucus, by comparing food-grade E171 with NM-105 (Aeroxyde P25) OECD reference nanomaterial...
June 19, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29890977/nanotechnology-a-promising-method-for-oral-cancer-detection-and-diagnosis
#19
REVIEW
Xiao-Jie Chen, Xue-Qiong Zhang, Qi Liu, Jing Zhang, Gang Zhou
Oral cancer is a common and aggressive cancer with high morbidity, mortality, and recurrence rate globally. Early detection is of utmost importance for cancer prevention and disease management. Currently, tissue biopsy remains the gold standard for oral cancer diagnosis, but it is invasive, which may cause patient discomfort. The application of traditional noninvasive methods-such as vital staining, exfoliative cytology, and molecular imaging-is limited by insufficient sensitivity and specificity. Thus, there is an urgent need for exploring noninvasive, highly sensitive, and specific diagnostic techniques...
June 11, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29859103/critical-review-of-the-safety-assessment-of-titanium-dioxide-additives-in-food
#20
REVIEW
Hans Christian Winkler, Tina Notter, Urs Meyer, Hanspeter Naegeli
Nanomaterial engineering provides an important technological advance that offers substantial benefits for applications not only in the production and processing, but also in the packaging and storage of food. An expanding commercialization of nanomaterials as part of the modern diet will substantially increase their oral intake worldwide. While the risk of particle inhalation received much attention, gaps of knowledge exist regarding possible adverse health effects due to gastrointestinal exposure. This problem is highlighted by pigment-grade titanium dioxide (TiO2 ), which confers a white color and increased opacity with an optimal particle diameter of 200-300 nm...
June 1, 2018: Journal of Nanobiotechnology
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