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Nanomedicine

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https://www.readbyqxmd.com/read/29345211/developing-single-entity-theranostic-drug-based-fluorescent-nanoclusters-with-augmented-cytotoxicity
#1
Bandhan Chatterjee, Asif Raza, Siddhartha Sankar Ghosh
AIM: To develop methotrexate (MTX) templated luminescent gold nanoclusters (NCs) as a single unit nanotheranostic for cancer therapy and to assess its potential as an alternative to the parent drug, for drug delivery vehicles (DDVs). METHODS: Theranostics were synthesized and extensively characterized. The stability of the theranostic and its bioimaging aptitude were evaluated. The antiproliferative propensity of the theranostic was gauged with cell viability assays and was supplemented with cytometry-based assays...
January 18, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29345202/qualitative-and-semiquantitative-analysis-of-the-protein-coronas-associated-to-different-functionalized-nanoparticles
#2
Francesca Pederzoli, Giovanni Tosi, Filippo Genovese, Daniela Belletti, Maria Angela Vandelli, Antonio Ballestrazzi, Flavio Forni, Barbara Ruozi
AIM: The investigation on protein coronas (PCs) adsorbed onto nanoparticle (NP) surface is representing an open issue due to difficulties in detection and clear isolation of the adsorbed proteins. In this study, we investigated protocols able to isolate the compositions of PCs of three polymeric NPs. MATERIALS & METHODS: Unfunctionalized NPs and two functionalized NPs were considered as proof-of-concept for the qualitative and semiquantitative analysis of both the corona levels (stably or weakly adsorbed coronas [SC/WC]) of these different nanocarriers...
January 18, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29345190/magnetoelectric-nanoparticles-for-delivery-of-antitumor-peptides-into-glioblastoma-cells-by-magnetic-fields
#3
Tiffanie S Stewart, Abhignyan Nagesetti, Rakesh Guduru, Ping Liang, Emmanuel Stimphil, Ali Hadjikhani, Luis Salgueiro, Jeffrey Horstmyer, Renzhi Cai, Andrew Schally, Sakhrat Khizroev
AIM: We studied externally controlled anticancer effects of binding tumor growth inhibiting synthetic peptides to magnetoelectric nanoparticles (MENs) on treatment of glioblastomas. METHODS: Hydrothermally synthesized 30-nm MENs had the core-shell composition of CoFe2O4@BaTiO3. Molecules of growth hormone-releasing hormone antagonist of the MIA class (MIA690) were chemically bound to MENs. In vitro experiments utilized human glioblastoma cells (U-87MG) and human brain microvascular endothelial cells...
January 18, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29338625/delivery-of-chemotherapeutics-using-spheres-made-of-bioengineered-spider-silks-derived-from-masp1-and-masp2-proteins
#4
Katarzyna Jastrzebska, Anna Florczak, Kamil Kucharczyk, Yinnan Lin, Qin Wang, Andrzej Mackiewicz, David L Kaplan, Hanna Dams-Kozlowska
AIM: Analysis of the properties and chemotherapeutics delivery potential of spheres made of bioengineered spider silks MS1 and MS2. MATERIALS & METHODS: MS1 and MS2 derived from Nephila clavipes dragline silks - MaSp1 and MaSp2, respectively - formed spheres that were compared in terms of physicochemical properties, cytotoxicity and loading/release of chemotherapeutics. RESULTS: MS2 spheres were more dispersed, smaller, of solid core, of higher beta-sheet structure content, and of opposite (negative) charge than MS1 spheres...
January 17, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29338619/novel-phellodendri-cortex-huang-bo-derived-carbon-dots-and-their-hemostatic-effect
#5
Xiaoman Liu, Yongzhi Wang, Xin Yan, Meiling Zhang, Yue Zhang, Jinjun Cheng, Fang Lu, Huihua Qu, Qingguo Wang, Yan Zhao
AIM: To explore the hemostatic effect of Phellodendri Cortex-derived carbon dots. MATERIALS & METHODS: Transmission electron microscopy, high-resolution transmission electron microscopy, Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, fluorescence spectroscopy, x-ray photoelectron spectroscopy and a cell counting kit-8 assay were studied. Hemostatic effect of Phellodendri Cortex Carbonisatus-carbon dots (PCC-CDs) was studied in mouse bleeding models...
January 17, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29338617/carbon-nanospheres-mediated-nuclear-delivery-of-smar1-protein-dna-binding-domain-controls-breast-tumor-in-mice-model
#6
Prasad N Bhagat, Sachin H Jadhav, Samit Chattopadhyay, Kishore M Paknikar
AIM: To investigate anticancer activity of the DNA binding domain of SMAR1 (His 5) in vitro and in vivo. MATERIALS & METHODS: His 5 was conjugated to hydrothermally synthesized carbon nanospheres (CNs). Anticancer activity of CNs-His 5 was evaluated in vitro and in vivo. RESULTS: CNs- His 5 significantly reduced cyclin D1 levels in MDA-MB-231 cells. Tumor bearing Balb/c mice injected with CNs-His 5 showed approximately 62% tumor regression and significantly reduced 18FDG uptake...
January 17, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29338613/combined-systems-of-different-antibiotics-with-nano-cuo-against-escherichia-coli-and-the-mechanisms-involved
#7
Yahui Zhang, Lin Wang, Xiang Xu, Fang Li, Qingsheng Wu
AIM: The combined efficacy of CuO nanoparticles (NPs) with 22 kinds of antibiotics against Escherichia coli was systematic studied, and CuO with cephalexin synergistic system was screened out. METHODS: Antimicrobial susceptibility test included disk diffusion test, checkerboard method and time-kill assay. The interactions of CuO NPs and antibiotics were analyzed by x-ray photoelectron spectroscopy, Fourier transform infrared spectra and Zeta. The interactions between bacteria and antibacterial agents were studied by surface plasmon resonance sensor for the first time...
January 17, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29338580/paeonol-nanoemulsion-for-enhanced-oral-bioavailability-optimization-and-mechanism
#8
Sufei Chen, Jing Zhang, Lei Wu, Hongfei Wu, Min Dai
AIM: The aim of this work was to optimize a nanoemulsion formulation and explain its absorption mechanism in improving the oral bioavailability of paeonol. METHOD: The bioavailability of paeonol was compared between paeonol nanoemulsion group and paeonol suspension group. The in situ single-pass intestine perfusion method, in vitro everted gut sacs method, Western blot analysis and Caco-2 cell transport studies were used to investigate the absorption mechanism of nanoemulsion...
January 17, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29338574/protein-nanoparticles-are-nontoxic-tuneable-cell-stressors
#9
Marianna Teixeira de Pinho Favaro, Laura Sánchez-García, Alejandro Sánchez-Chardi, Mónica Roldán, Ugutz Unzueta, Naroa Serna, Olivia Cano-Garrido, Adriano Rodrigues Azzoni, Neus Ferrer-Miralles, Antonio Villaverde, Esther Vázquez
AIM: Nanoparticle-cell interactions can promote cell toxicity and stimulate particular behavioral patterns, but cell responses to protein nanomaterials have been poorly studied. RESULTS: By repositioning oligomerization domains in a simple, modular self-assembling protein platform, we have generated closely related but distinguishable homomeric nanoparticles. Composed by building blocks with modular domains arranged in different order, they share amino acid composition...
January 17, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29338573/triphenylphosphine-docetaxel-conjugate-incorporated-albumin-nanoparticles-for-cancer-treatment
#10
Gantumur Battogtokh, Oyuntuya Gotov, Jee He Kang, Jinsung Cho, Tae Ho Jeong, Ganzorig Chimed, Young Tag Ko
AIM: The objective of this study was to develop a mitochondria-targeted anticancer drug, docetaxel (DTX), for chemotherapy. MATERIALS & METHODS: The DTX was conjugated to 4-carboxybutyl triphenylphosphonium (TPP) to enhance mitochondrial targeting, and the TPP-DTX conjugate was further loaded into folate-cholesteryl albumin (FA-chol-BSA) nanoparticles (NPs) to improve its biocompatibility. RESULTS & CONCLUSION: In vitro studies showed that TPP-DTX and its NP primarily accumulated in the mitochondria; generated high reactive oxygen species, leading to mitochondrial disruption and cell apoptosis; and had a higher cytotoxicity against cancer cells...
January 17, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29338562/targeted-microbubbles-with-ultrasound-irradiation-and-pd-1-inhibitor-to-increase-antitumor-activity-in-b-cell-lymphoma
#11
Shiya Zheng, Dan Song, Xiaoxiao Jin, Haijun Zhang, Mohanad Aldarouish, Yan Chen, Cailian Wang
AIM: Severe cardiac toxicity of doxorubicin and an immunosuppressive tumor micro-environment become main obstacles for the effective treatment of B-cell lymphoma. In this research, rituximab-conjugated and doxorubicin-loaded microbubbles (RDMs) were designed for exploring a combination approach of targeted microbubbles with ultrasound (US) irradiation and PD-1 inhibitor to overcome obstacles mentioned above. METHODS: In vivo studies were performed on SU-DHL-4 cell-grafted mice and ex vivo studies were performed on CD20+ human SU-DHL-4 cells and human T cells...
January 17, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29338559/how-can-3d-printing-be-a-powerful-tool-in-nanomedicine
#12
Wei Zhu, Thomas J Webster, Lijie Grace Zhang
No abstract text is available yet for this article.
January 17, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29338557/biosynthesis-characterization-and-leishmanicidal-activity-of-a-biocomposite-containing-agnps-pvp-glucantime
#13
Ana Patricia Cacua Gélvez, Luis Henrique Seabra Farias, Victor Soares Pereira, Inaldo Claudio Martins da Silva, Ana Carolina Costa, Carmen Gilda Barroso Tavares Dias, Roseane Maria Ribeiro Costa, Silvia Helena Marques Da Silva, Ana Paula Drummond Rodrigues
AIM: Development of functionalized nanocomposites containing AgNPs-PVP-Glucantime® to evaluate their leishmanicidal activity as a novel method for improving the pharmacological properties of the drug Glucantime® against extracellular promastigotes and intracellular amastigotes of Leishmania amazonensis in vitro to treat cutaneous leishmaniasis. MATERIALS & METHODS: The silver nanoparticles and nanocomposites prepared containing silver nanoparticles, polyvinylpyrrolidone and different amounts of Glucantime were characterized using transmission electron microscopy, x-ray diffraction, energy-dispersive x-ray spectroscopy and ζ potential analysis; in addition, the in vitro cytotoxicity was evaluated...
January 17, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29334336/engineering-mechanical-microenvironment-of-macrophage-and-its-biomedical-applications
#14
Jing Li, Yuhui Li, Bin Gao, Chuanguang Qin, Yining He, Feng Xu, Hui Yang, Min Lin
Macrophages are the most plastic cells in the hematopoietic system and can be widely found in almost all tissues. Recently studies have shown that mechanical cues (e.g., matrix stiffness and stress/strain) can significantly affect macrophage behaviors. Although existing reviews on the physical and mechanical cues that regulate the macrophage's phenotype are available, engineering mechanical microenvironment of macrophages in vitro as well as a comprehensive overview and prospects for their biomedical applications (e...
January 15, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29334311/the-surface-chemistry-determines-the-spatio-temporal-interaction-dynamics-of-quantum-dots-in-atherosclerotic-lesions
#15
Bernd Uhl, Stephanie Hirn, Karina Mildner, Raffaele Coletti, Steffen Massberg, Christoph A Reichel, Markus Rehberg, Dagmar Zeuschner, Fritz Krombach
AIM: To optimize the design of nanoparticles for diagnosis or therapy of vascular diseases, it is mandatory to characterize the determinants of nano-bio interactions in vascular lesions. MATERIALS & METHODS: Using ex vivo and in vivo microscopy, we analyzed the interactive behavior of quantum dots with different surface functionalizations in atherosclerotic lesions of ApoE-deficient mice. RESULTS: We demonstrate that quantum dots with different surface functionalizations exhibit specific interactive behaviors with distinct molecular and cellular components of the injured vessel wall...
January 15, 2018: Nanomedicine
https://www.readbyqxmd.com/read/29231780/a-priming-dose-protects-against-gold-nanoparticles-induced-proinflammatory-cytokines-mrna-expression-in-mice
#16
Khalid Elfaki Ibrahim, Amel Omer Bakhiet, Maaweya Elaeed Awadalla, Haseeb Ahmad Khan
AIM: To study the effect of priming doses of gold nanoparticles (GNPs) on proinflammatory cytokines in different organs of mice. MATERIALS & METHODS: Mice were injected with a single or two doses (priming group) of GNPs (5, 20 and 50 nm) and sacrificed after 1 or 7 days. The mRNA expressions of IL-1β, IL-6 and TNF-α were determined in liver, kidney and spleen. RESULTS: A single injection of 5 nm GNPs significantly increased the mRNA expressions of IL-1β and IL-6 in liver, which were normalized on day 7...
December 12, 2017: Nanomedicine
https://www.readbyqxmd.com/read/29199893/nanoparticle-sirna-based-therapy-strategies-in-glioma-which-nanoparticles-which-sirnas
#17
Achim Aigner, Donat Kögel
Nanomedicines allow for the delivery of small interfering RNAs (siRNAs) that are otherwise barely suitable as therapeutics for inducing RNA interference (RNAi). In preclinical studies on siRNA-based glioma treatment in vivo, various groups of nanoparticle systems, routes of administration and target genes have been explored. Targeted delivery by functionalization of nanoparticles with a ligand for crossing the blood-brain barrier and/or for enhanced target cell transfection has been described as well. Focusing on nanoparticle developments in the last approximately 10 years, this review article gives a comprehensive overview of nanoparticle systems for siRNA delivery into glioma and of preclinical in vivo studies...
December 4, 2017: Nanomedicine
https://www.readbyqxmd.com/read/29199887/the-inflammatory-response-to-silver-and-titanium-dioxide-nanoparticles-in-the-central-nervous-system
#18
Tianshu Wu, Meng Tang
Despite the increasing number of neurotoxicological studies on metal-containing nanoparticles (NPs), the NP-induced neuroinflammation has not yet been well understood. This review provides a comprehensive understanding of inflammatory responses to two typical metal-containing NPs, namely silver NPs (Ag-NPs) and titanium dioxide NPs (TiO2-NPs). Ag-NPs and TiO2-NPs could translocate into the CNS through damaged blood-brain barrier, nerve afferent signaling and eye-to-brain ways, and even cell uptake. NPs could stimulate the activation of glial cells to release proinflammatory cytokines and generate reactive oxygen species and nitric oxide production, resulting in the neuroinflammation...
December 4, 2017: Nanomedicine
https://www.readbyqxmd.com/read/29199881/phytochylomicron-as-a-dual-nanocarrier-for-liver-cancer-targeting-of-luteolin-in-vitro-appraisal-and-pharmacodynamics
#19
Yosra Sr Elnaggar, Manal A Elsheikh, Ossama Y Abdallah
AIM: A novel luteolin (LUT) loaded dual bionanocarrier 'phytochylomicron' was elaborated to allow LUT injectable delivery and liver cancer targeting. METHODS: LUT-phospholipid complex was prepared and loaded into chylomicron nanocarrier. Then phytochylomicron underwent physicochemical characterization, cell culture and pharmacodynamics studies on a new liver-tumor model. RESULTS: Phytochylomicron showed sustained release pattern with minimum drug leakage until reaching the liver...
December 4, 2017: Nanomedicine
https://www.readbyqxmd.com/read/29185387/latest-developments-in-innovative-manufacturing-to-combine-nanotechnology-with-healthcare
#20
Maryam Parhizkar, Suntharavathanan Mahalingam, Shervanthi Homer-Vanniasinkam, Mohan Edirisinghe
No abstract text is available yet for this article.
November 29, 2017: Nanomedicine
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