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Journal of Nanobiotechnology

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https://www.readbyqxmd.com/read/30012166/pegylated-self-assembled-enzyme-responsive-nanoparticles-for-effective-targeted-therapy-against-lung-tumors
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
https://www.readbyqxmd.com/read/29855304/polylysine-as-a-functional-biopolymer-to-couple-gold-nanorods-to-tumor-tropic-cells
#8
Claudia Borri, Sonia Centi, Fulvio Ratto, Roberto Pini
BACKGROUND: The delivery of plasmonic particles, such as gold nanorods, to the tumor microenvironment has attracted much interest in biomedical optics for topical applications as the photoacoustic imaging and photothermal ablation of cancer. However, the systemic injection of free particles still crashes into a complexity of biological barriers, such as the reticuloendothelial system, that prevent their efficient biodistribution. In this context, the notion to exploit the inherent features of tumor-tropic cells for the creation of a Trojan horse is emerging as a plausible alternative...
May 31, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29769077/magnetic-field-distribution-modulation-of-intrathecal-delivered-ketorolac-iron-oxide-nanoparticle-conjugates-produce-excellent-analgesia-for-chronic-inflammatory-pain
#9
Ping-Ching Wu, Dar-Bin Shieh, Hung-Tsung Hsiao, Jeffery Chi-Fei Wang, Ya-Chi Lin, Yen-Chin Liu
BACKGROUND: Nanoparticles have become one of the most promising among the potential materials used for biomedical applications. However, few researchers have focused on their effects on analgesia. Despite the fact that various nanoparticles have been evaluated for drug delivery and MRI imaging contrast enhancement in clinical settings, no reports have investigated the in vivo synergy of ketorolac iron-oxide nanoparticle conjugates to improve the analgesic effect. METHODS: Ketorolac conjugated magnetic iron oxide nanoparticles (Keto-SPIO) were synthesized via two-stage additions of protective agents and chemical co-precipitation...
May 16, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29751767/development-of-gold-nanoparticles-biosensor-for-ultrasensitive-diagnosis-of-foot-and-mouth-disease-virus
#10
Mervat E Hamdy, Michele Del Carlo, Hussein A Hussein, Taher A Salah, Ayman H El-Deeb, Mohamed M Emara, Guilia Pezzoni, Dario Compagnone
BACKGROUND: Nano-PCR is a recent tool that is used in viral diseases diagnosis. The technique depends on the fundamental effects of gold nanoparticles (AuNPs) and is considered a very effective and sensitive tool in the diagnosis of different diseases including viral diseases. Although several techniques are currently available to diagnose foot and mouth disease virus (FMDV), a highly sensitive, highly specific technique is needed for specific diagnosis of the disease. In the present work, a novel AuNPs biosensor has been designed using thiol-linked oligonucleotides that recognize the conserved 3D gene of FMDV...
May 11, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29720232/highly-sensitive-and-robust-peroxidase-like-activity-of-au-pt-core-shell-nanorod-antigen-conjugates-for-measles-virus-diagnosis
#11
Lin Long, Jianbo Liu, Kaishun Lu, Tao Zhang, Yunqing Xie, Yinglu Ji, Xiaochun Wu
BACKGROUND: As a promising candidate for artificial enzymes, catalytically active nanomaterials show several advantages over natural enzymes, such as controlled synthesis at low cost, tunability of catalytic activities, and high stability under stringent conditions. Rod-shaped Au-Pt core/shell nanoparticles (Au@Pt NRs), prepared by Au nanorod-mediated growth, exhibit peroxidase-like activities and could serve as an inexpensive replacement for horseradish peroxidase, with potential applications in various bio-detections...
May 2, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29720199/immunoassays-for-scarce-tumour-antigens-in-exosomes-detection-of-the-human-nkg2d-ligand-mica-in-tetraspanin-containing-nanovesicles-from-melanoma
#12
Sheila López-Cobo, Carmen Campos-Silva, Amanda Moyano, Myriam Oliveira-Rodríguez, Annette Paschen, María Yáñez-Mó, María Carmen Blanco-López, Mar Valés-Gómez
BACKGROUND: Tumour-derived exosomes can be released to serum and provide information on the features of the malignancy, however, in order to perform systematic studies in biological samples, faster diagnostic techniques are needed, especially for detection of low abundance proteins. Most human cancer cells are positive for at least one ligand for the activating immune receptor NKG2D and the presence in plasma of NKG2D-ligands can be associated with prognosis. METHODS: Using MICA as example of a tumour-derived antigen, endogenously expressed in metastatic melanoma and recruited to exosomes, we have developed two immunocapture-based assays for detection of different epitopes in nanovesicles...
May 2, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29703212/identification-of-interneurons-required-for-the-aversive-response-of-caenorhabditis-elegans-to-graphene-oxide
#13
Guosheng Xiao, He Chen, Natalia Krasteva, Qizhan Liu, Dayong Wang
BACKGROUND: So far, how the animals evade the environmental nanomaterials is still largely unclear. In this study, we employed in vivo assay system of Caenorhabditis elegans to investigate the aversive behavior of nematodes to graphene oxide (GO) and the underlying neuronal basis. RESULTS: In this assay model, we detected the significant aversive behavior of nematodes to GO at concentrations more than 50 mg/L. Loss-of-function mutation of nlg-1 encoding a neuroligin with the function in connecting pre- and post-synaptic neurons suppressed the aversive behavior of nematodes to GO...
April 27, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29695232/biocompatibility-assessment-of-single-walled-carbon-nanotubes-using-saccharomyces-cerevisiae-as-a-model-organism
#14
Song Zhu, Fei Luo, Jian Li, Bin Zhu, Gao-Xue Wang
BACKGROUND: Single-walled carbon nanotubes (SWCNTs) have many potential applications in various fields. Especially, the unique physicochemical properties make them as the prime candidates for applications in biomedical fields. However, biocompatibility of SWCNTs has been a major concern for their applications. In the study, biocompatibility of oxidized SWCNTs (O-SWCNTs) was assessed using Saccharomyces cerevisiae (S. cerevisiae) as a model organism. RESULTS: Cell proliferation and viability were significantly changed after exposure to O-SWCNTs (188...
April 25, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29673366/improving-cytocompatibility-of-cdte-quantum-dots-by-schiff-base-coordinated-lanthanides-surface-doping
#15
Hana Buchtelova, Vladislav Strmiska, Zuzana Skubalova, Simona Dostalova, Petr Michalek, Sona Krizkova, David Hynek, Lukas Kalina, Lukas Richtera, Amitava Moulick, Vojtech Adam, Zbynek Heger
BACKGROUND: Suitable fluorophores are the core of fluorescence imaging. Among the most exciting, yet controversial, labels are quantum dots (QDs) with their unique optical and chemical properties, but also considerable toxicity. This hinders QDs applicability in living systems. Surface chemistry has a profound impact on biological behavior of QDs. This study describes a two-step synthesis of QDs formed by CdTe core doped with Schiff base ligand for lanthanides [Ln (Yb3+ , Tb3+ and Gd3+ )] as novel cytocompatible fluorophores...
April 19, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29673352/a-multifunctional-targeting-probe-with-dual-mode-imaging-and-photothermal-therapy-used-in-vivo
#16
Xiao-Shuai Zhang, Yang Xuan, Xiao-Quan Yang, Kai Cheng, Ruo-Yun Zhang, Cheng Li, Fang Tan, Yuan-Cheng Cao, Xian-Lin Song, Jie An, Xiao-Lin Hou, Yuan-Di Zhao
BACKGROUND: Ag2 S has the characteristics of conventional quantum dot such as broad excitation spectrum, narrow emission spectrum, long fluorescence lifetime, strong anti-bleaching ability, and other optical properties. Moreover, since its fluorescence emission is located in the NIR-II region, has stronger penetrating ability for tissue. Ag2 S quantum dot has strong absorption during the visible and NIR regions, it has good photothermal and photoacoustic response under certain wavelength excitation...
April 19, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29669544/pegylated-crushed-gold-shell-radiolabeled-core-nanoballs-for-in-vivo-tumor-imaging-with-dual-positron-emission-tomography-and-cerenkov-luminescent-imaging
#17
Sang Bong Lee, Dinesh Kumar, Yinghua Li, In-Kyu Lee, Sung Jin Cho, Sang Kyoon Kim, Sang-Woo Lee, Shin Young Jeong, Jaetae Lee, Yong Hyun Jeon
BACKGROUND: Radioactive isotope-labeled gold nanomaterials have potential biomedical applications. Here, we report the synthesis and characterization of PEGylated crushed gold shell-radioactive iodide-124-labeled gold core nanoballs (PEG-124 I-Au@AuCBs) for in vivo tumor imaging applications through combined positron emission tomography and Cerenkov luminescent imaging (PET/CLI). RESULTS: PEG-124 I-Au@AuCBs showed high stability and sensitivity in various pH solutions, serum, and in vivo conditions and were not toxic to tested cells...
April 18, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29653579/delivery-of-sirna-in-vitro-and-in-vivo-using-pei-capped-porous-silicon-nanoparticles-to-silence-mrp1-and-inhibit-proliferation-in-glioblastoma
#18
Wing Yin Tong, Mohammed Alnakhli, Richa Bhardwaj, Sinoula Apostolou, Sougata Sinha, Cara Fraser, Tim Kuchel, Bryone Kuss, Nicolas H Voelcker
BACKGROUND: Multidrug resistance-associated protein 1 (MRP1) overexpression plays a major role in chemoresistance in glioblastoma multiforme (GBM) contributing to its notorious deadly nature. Although MRP1-siRNA transfection to GBM in vitro has been shown to sensitise the cells to drug, MRP1 silencing in vivo and the phenotypic influence on the tumour and normal tissues upon MRP1 down-regulation have not been established. Here, porous silicon nanoparticles (pSiNPs) that enable high-capacity loading and delivery of siRNA are applied in vitro and in vivo...
April 13, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29653577/nanotechnology-based-approaches-for-detection-and-delivery-of-microrna-in-healthcare-and-crop-protection
#19
REVIEW
Vrantika Chaudhary, Sumit Jangra, Neelam R Yadav
Nanobiotechnology has the potential to revolutionize diverse sectors including medicine, agriculture, food, textile and pharmaceuticals. Disease diagnostics, therapeutics and crop protection strategies are fast emerging using nanomaterials preferably nanobiomaterials. It has potential for development of novel nanobiomolecules which offer several advantages over conventional treatment methods. RNA nanoparticles with many unique features are promising candidates in disease treatment. The miRNAs are involved in many biochemical and developmental pathways and their regulation in plants and animals...
April 13, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29653575/enhanced-stability-of-a-chimeric-hepatitis-b-core-antigen-virus-like-particle-hbcag-vlp-by-a-c-terminal-linker-hexahistidine-peptide
#20
Jens Schumacher, Tijana Bacic, René Staritzbichler, Matin Daneschdar, Thorsten Klamp, Philipp Arnold, Sabrina Jägle, Özlem Türeci, Jürgen Markl, Ugur Sahin
BACKGROUND: Virus-like-particles (VLPs) are attractive nanoparticulate scaffolds for broad applications in material/biological sciences and medicine. Prior their functionalization, specific adaptations have to be carried out. These adjustments frequently lead to disordered particles, but the particle integrity is an essential factor for the VLP suitability. Therefore, major requirements for particle stabilization exist. The objective of this study was to evaluate novel stabilizing elements for functionalized chimeric hepatitis B virus core antigen virus-like particles (HBcAg-VLP), with beneficial characteristics for vaccine development, imaging or delivery...
April 13, 2018: Journal of Nanobiotechnology
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