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https://www.readbyqxmd.com/read/28923735/pegylated-magnetic-prussian-blue-nanoparticles-asa-multifunctional-therapeutic-agent-for-combined-targeted-photothermal-ablation-and-ph-triggered-chemotherapy-of-tumour-cells
#1
Peng Xue, Lihong Sun, Qian Li, Lei Zhang, Zhigang Xu, Chang Ming Li, Yuejun Kang
Multifunctional nanoagents have become popular and valuable pharmaceuticals for effective cancer treatment. Moreover, there is an increasing tendency to develop therapeutic agents with excellent biocompatibility, high efficiency, specific targeting and combinatorial treatment effects. In this study, we proposed a facile technique to synthesize PEGylated (polyethylene glycol modified) magnetic Prussian blue (PB) nanoparticles with encapsulated doxorubicin (DOX), abbreviated as Fe3O4@PB/PEG/DOX NPs, for combined targeted photothermal ablation and pH-triggered chemotherapy of tumour cells...
September 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28923420/high-doses-of-lipid-core-nanocapsules-do-not-affect-bovine-embryonic-development-in-vitro
#2
Caroline Lucas, Mariana Remião, Franciele Bruinsmann, Isadora Lopes, Morgana Borges, Ana Laura Feijó, Andrea Cristina Basso, Adriana Pohlmann, Silvia Guterres, Vinicius Campos, Fabiana Seixas, Tiago Collares
The improvement of in vitro embryo production by culture media supplementation has been a potential tool to increase blastocyst quality and development. Recently, lipid-core nanocapsules (LNC), which were developed for biomedical applications as a drug-delivery system, have demonstrated beneficial effects on in vitro embryo production studies. LNCs have a core composed of sorbitan monostearate dispersed in capric/caprylic triglyceride. Based on that, we firstly investigated if LNCs supplemented during in vitro oocyte maturation had affinity to the mineral oil placed over the top of the IVM media...
September 15, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28913948/synthesis-of-size-tunable-hollow-polypyrrole-nanostructures-and-their-assembly-into-folate-targeting-and-ph-responsive-anti-cancer-drug-delivery
#3
Jian Chen, Xiufang Li, Yanhua Sun, Yuwei Hu, Yulong Peng, Yimin Li, Gang Yin, Hui Liu, Jiangfeng Xu, Shian Zhong
Chemotherapeutic drugs currently used in clinical settings have a high toxicity, low specificity, and short half-life. Herein, polypyrrole (PPy)-based anticancer drug nanocapsules were prepared by tailoring the nanoparticle size with a template method, controlling drug release by aromatic imine, increasing nanoparticle stability through PEGylation, and improving tumor cell selectivity via folate (FA) mediation. Nanoparticles were characterized by transmission electron microscopy (TEM) and dynamic light scattering (DLS)...
September 15, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28891586/poly-n-acryloyl-l-phenylalanine-methyl-ester-hollow-core-nanocapsules-facilitate-sustained-delivery-of-immunomodulatory-drugs-and-exhibit-adjuvant-properties
#4
Anil Kumar Yamala, Vinod Nadella, Yitzhak Mastai, Hridayesh Prakash, Pradip Paik
Polymeric hollow nanocapsules have attracted significant research attention as novel drug carriers and their preparation is of particular concern owing to the feasibility to encapsulate a broad range of drug molecules. This work presents for the first time the synthesis and development of novel poly-N-acryloyl l-phenylalanine methyl ester hollow core nanocapsules (NAPA-HPNs) of avg. size ca. 100-150 nm by the mini-emulsion technique. NAPA-HPNs are biocompatible and capable of encapsulating sodium nitroprusside (SNP) at a rate of ∼1...
September 11, 2017: Nanoscale
https://www.readbyqxmd.com/read/28891273/self-assembly-of-an-amphiphilic-janus-camptothecin-floxuridine-conjugate-into-liposome-like-nanocapsules-for-more-efficacious-combination-chemotherapy-in-cancer
#5
Xiaolong Liang, Chuang Gao, Ligang Cui, Shumin Wang, Jinrui Wang, Zhifei Dai
The combination of camptothecin (CPT) and fluoropyrimidine derivatives acts synergistically at a 1:1 molar ratio. Practically, the greatest challenge is the development of a single liposomal formulation that can both encapsulate and maintain this drug combination at an exact 1:1 ratio to achieve coordinated pharmacokinetics. Consequently, a new type of liposome-like nanocapsule (NC) is developed from a highly symmetric Janus camptothecin-floxuridine conjugate (JCFC) amphiphile, which is synthesized by coupling two hydrophobic CPT molecules and two hydrophilic floxuridine (FUDR) molecules to multivalent pentaerythritol via a hydrolyzable ester linkage...
September 11, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28885706/halloysite-nanocapsules-containing-thyme-essential-oil-preparation-characterization-and-application-in-packaging-materials
#6
Si-Hoon Jang, So-Ri Jang, Gyeong-Min Lee, Jee-Hoon Ryu, Su-Il Park, No-Hyung Park
Halloysite nanotubes (HNTs), which are natural nanomaterials, have a hollow tubular structure with about 15 nm inner and 50 nm outer diameters. Because of their tubular shape, HNTs loaded with various materials have been investigated as functional nanocapsules. In this study, thyme essential oil (TO) was encapsulated successfully in HNTs using vacuum pulling methods, followed by end-capping or a layer-by-layer surface coating process for complete encapsulation. Nanocapsules loaded with TO were mixed with flexographic ink and coated on a paper for applications as food packaging materials...
September 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28875471/optimization-of-curcuma-oil-quinine-loaded-nanocapsules-for-malaria-treatment
#7
Graziela Scheuer Gomes, Tamara Ramos Maciel, Eduarda Martini Piegas, Luana Roberta Michels, Letícia Marques Colomé, Rodrigo José Freddo, Daiana Silva de Ávila, Andre Gundel, Sandra Elisa Haas
Quinine, a treatment used in chloroquine-resistant falciparum malaria, was loaded into poly(ɛ-caprolactone) or Eudragit(®) RS100 nanocapsules using Curcuma oil as the oil-based core. Until now, the effect of cationic nanocapsules on malaria has not been reported. A 2(4) factorial design was adopted using, as independent variables, the concentration of Curcuma oil, presence of quinine, type of polymer, and aqueous surfactant. Diameter, zeta potential, and pH were the responses studied. The formulations were also evaluated for drug content, encapsulation efficiency, photostability, and antimalarial activity against Plasmodium berghei-infected mice...
September 5, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28875169/a-polyaromatic-nanocapsule-as-a-sucrose-receptor-in-water
#8
Masahiro Yamashina, Munetaka Akita, Taisuke Hasegawa, Shigehiko Hayashi, Michito Yoshizawa
Selective recognition of saccharides by artificial receptors in water is a challenging goal due to their strong hydrophilicities and complex molecular structures with subtle regio- and stereochemical differences. We report the selective and efficient encapsulation of d-sucrose within a coordination-driven molecular capsule from natural saccharide mixtures in water (~100% selectivity, >85% yield, and ~10(3) M(-1) binding constant). Unlike previous artificial receptors and natural receptors that rely on multiple hydrogen-bonding interactions, theoretical calculations and control experiments indicate that the observed unique selectivity arises from multiple CH-π interactions between the sucrose hydrocarbon backbone and the shape-complementary polyaromatic cavity (~1 nm in diameter) of the capsule...
August 2017: Science Advances
https://www.readbyqxmd.com/read/28867377/ultrasound-induced-mild-hyperthermia-improves-the-anticancer-efficacy-of-both-taxol%C3%A2-and-paclitaxel-loaded-nanocapsules
#9
Tanguy Boissenot, Alexandre Bordat, Benoît Larrat, Mariana Varna, Hélène Chacun, Angelo Paci, Vianney Poinsignon, Elias Fattal, Nicolas Tsapis
We study the influence of ultrasound on paclitaxel-loaded nanocapsules in vitro and in vivo. These nanocapsules possess a shell of poly(dl-lactide-co-glycolide)-poly(ethylene glycol) (PLGA-PEG) and a liquid core of perfluorooctyl bromide (PFOB). In vitro experiments show that mechanical effects such as cavitation are negligible for nanocapsules due to their small size and thick and rigid shell. As the mechanical effects were unable to increase paclitaxel delivery, we focused on the thermal effects of ultrasound in the in vivo studies...
September 1, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28853437/corrigendum-in-situ-targeted-mri-detection-of-helicobacter-pylori-with-stable-magnetic-graphitic-nanocapsules
#10
Yunjie Li, Xiaoxiao Hu, Ding Ding, Yuxiu Zou, Yiting Xu, Xuewei Wang, Yin Zhang, Long Chen, Zhuo Chen, Weihong Tan
This corrects the article DOI: 10.1038/ncomms15653.
August 30, 2017: Nature Communications
https://www.readbyqxmd.com/read/28852887/nanostructured-cinnamon-oil-has-the-potential-to-control-rhipicephalus-microplus-ticks-on-cattle
#11
Daiane S Dos Santos, Jhonatan P Boito, Roberto C V Santos, Priscilla M Quatrin, Aline Ferreira Ourique, João H Dos Reis, Roger R Gebert, Patrícia Glombowsky, Vanderlei Klauck, Aline A Boligon, Matheus D Baldissera, Aleksandro S Da Silva
The aim of this study was to evaluate the capacity of pure and nanostructured cinnamon oil to control the infestation and reproductive efficiency of Rhipicephalus microplus on dairy cows. In vitro (stage I)-engorged female ticks were immersed in concentrations of 1.0, 5.0 and 10% of cinnamon oil on its pure form, and 0.5, 1.0, and 5.0% of the nanostructured form. 10% cinnamon oil (pure form) showed 100% efficacy, whereas concentrations of 1 and 5% were 62 and 97% efficacious, respectively. Nanocapsules and nanoemulsions containing cinnamon oil at 5% showed 95 and 97% efficacy, respectively...
August 29, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28838760/in-vitro-assessment-of-anti-tumorigenic-mechanisms-and-efficacy-of-nanoala-a-nanoformulation-of-aminolevulic-acid-designed-for-photodynamic-therapy-of-cancer
#12
Laise Rodrigues de Andrade, Fernando Lucas Primo, Jaqueline Rodrigues da Silva, Antonio Claudio Tedesco, Zulmira Guerrero Marques Lacava
BACKGROUND: The development of nanocarriers is an important approach to increase the bioavailability of hydrophilic drugs in target cells. In this work, we evaluated the anti-tumorigenic mechanisms and efficacy of NanoALA, a novel nanoformulation of aminolevulic acid (ALA) based on poly(lactide-co-glycolide) (PLGA) nanocapsules designed for anticancer photodynamic therapy (PDT). METHODS: For this purpose, physicochemical characterization, prodrug incorporation kinetics, biocompatibility and photocytotoxicity tests, analysis of the cell death type and mitochondrial function, measurement of the intracellular reactive oxygen species production and DNA fragmentation were performed in murine mammary carcinoma (4T1) cells...
August 21, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28830791/injectable-nanomedicine-hydrogel-for-local-chemotherapy-of-glioblastoma-after-surgical-resection
#13
C Bastiancich, J Bianco, K Vanvarenberg, B Ucakar, N Joudiou, B Gallez, G Bastiat, F Lagarce, V Préat, F Danhier
Glioblastoma (GBM) treatment includes, when possible, surgical resection of the tumor followed by radiotherapy and oral chemotherapy with temozolomide, however recurrences quickly develop around the resection cavity borders leading to patient death. We hypothesize that the local delivery of Lauroyl-gemcitabine lipid nanocapsule based hydrogel (GemC12-LNC) in the tumor resection cavity of GBM is a promising strategy as it would allow to bypass the blood brain barrier, thus reaching high local concentrations of the drug...
August 19, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28830289/in-vitro-evaluation-of-%C3%AE-lipoic-acid-loaded-lipid-nanocapsules-for-topical-delivery
#14
Nan Xia, Tian Liu, Qiang Wang, Qiang Xia, Xiaoli Bian
This study aimed at in vitro evaluation of α-lipoic acid-loaded lipid nanocapsules for topical delivery, which was prepared by hot high-pressure homogenisation. Stable particles could be formed and particle size was 148.54 ± 2.31 nm with polydispersity index below 0.15. Encapsulation efficiency and drug loading of α-lipoic acid were 95.23 ± 0.45% and 2.81 ± 0.37%. Antioxidant study showed α-lipoic acid could be protected by lipid nanocapsules without loss of antioxidant activity. Sustained release of α-lipoic acid from lipid nanocapsules was obtained and cumulative release was 62...
September 3, 2017: Journal of Microencapsulation
https://www.readbyqxmd.com/read/28825714/cell-targetable-dna-nanocapsules-for-spatiotemporal-release-of-caged-bioactive-small-molecules
#15
Aneesh T Veetil, Kasturi Chakraborty, Kangni Xiao, Myles R Minter, Sangram S Sisodia, Yamuna Krishnan
Achieving triggered release of small molecules with spatial and temporal precision at designated cells within an organism remains a challenge. By combining a cell-targetable, icosahedral DNA-nanocapsule loaded with photoresponsive polymers, we show cytosolic delivery of small molecules with the spatial resolution of single endosomes in specific cells in Caenorhabditis elegans. Our technology can report on the extent of small molecules released after photoactivation as well as pinpoint the location at which uncaging of the molecules occurred...
August 21, 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/28823025/nanomedicine-associated-with-photodynamic-therapy-for-glioblastoma-treatment
#16
REVIEW
Leonardo B de Paula, Fernando L Primo, Antonio C Tedesco
Glioblastoma, also known as glioblastoma multiforme (GBM), is the most recurrent and malignant astrocytic glioma found in adults. Biologically, GBMs are highly aggressive tumors that often show diffuse infiltration of the brain parenchyma, making complete surgical resection difficult. GBM is not curable with surgery alone because tumor cells typically invade the surrounding brain, rendering complete resection unsafe. Consequently, present-day therapy for malignant glioma remains a great challenge. The location of the invasive tumor cells presents several barriers to therapeutic delivery...
August 19, 2017: Biophysical Reviews
https://www.readbyqxmd.com/read/28822845/triphenyl-phosphonium-coated-nano-quercetin-for-oral-delivery-neuroprotective-effects-in-attenuating-age-related-global-moderate-cerebral-ischemia-reperfusion-injury-in-rats
#17
Swarupa Ghosh, Sibani Sarkar, Somsubhra T Choudhury, Tirtha Ghosh, Nirmalendu Das
Cerebral ischemia-reperfusion is a classic example of reactive oxygen species (ROS) mediated acute damage to brain. Post-ischemic reperfusion induced oxygen free radicals production causes damage to brain cell mitochondria. Antioxidants like quercetin (Qc) have potentials to manage oxidative stress related pathophysiology. However low oral bioavailability and poor cell membrane permeability restrict its therapeutic efficacy. To overcome these hurdles mitochondria specific delivery of Qc nanocapsules was designed to efficiently counteract cerebral ischemia-reperfusion induced cell death and neurodegeneration in young and aged rats...
August 16, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28820568/enhanced-drug-delivery-into-cell-cytosol-via-glycoprotein-h-derived-peptide-conjugated-nanoemulsions
#18
Teresa Fotticchia, Raffaele Vecchione, Pasqualina Liana Scognamiglio, Daniela Guarnieri, Vincenzo Calcagno, Concetta Di Natale, Chiara Attanasio, Maria De Gregorio, Chiara Di Cicco, Vincenzo Quagliariello, Nicola Maurea, Antonio Barbieri, Luca Raiola, Rosario Vincenzo Iaffaioli, Paolo Antonio Netti
The key role of nanocarriers in improving the pharmacological properties of commonly used drugs is recognized worldwide. It is also known that in the development of new effective nanocarriers the use of targeting moieties integrated on their surface is essential. Herein, we propose a nanocarrier based on an oil in water nanoemulsion coated with a membranotropic peptide derived from the glycoprotein H of Herpes simplex virus 1, known as gH625, in order to reduce endo-lysosomal accumulation and to enhance cytosolic localization...
August 18, 2017: ACS Nano
https://www.readbyqxmd.com/read/28814794/increased-body-exposure-to-new-anti-trypanosomal-through-nanoencapsulation
#19
Renata Tupinambá Branquinho, Gwenaelle Pound-Lana, Matheus Marques Milagre, Dênia Antunes Saúde-Guimarães, José Mário Carneiro Vilela, Margareth Spangler Andrade, Marta de Lana, Vanessa Carla Furtado Mosqueira
Lychnopholide, a lipophilic sesquiterpene lactone, is efficacious in mice at the acute and chronic phases of Chagas disease. Conventional poly-ε-caprolactone (PCL) and long-circulating poly(D,L-lactide)-block-polyethylene glycol (PLA-PEG) nanocapsules containing lychnopholide were developed and characterized. Lychnopholide presented high association efficiency (>90%) with the nanocapsules. A new, fast and simple HPLC-UV-based bioanalytical method was developed, validated in mouse plasma and applied to lychnopholide quantification in in vitro release kinetics and pharmacokinetics...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28809964/self-assembly-of-m7l2-metal-organic-nanocapsules-using-mixed-macrocycles
#20
Chen Zhang, Kanishka Sikligar, Rahul S Patil, Charles L Barnes, Simon J Teat, Jerry L Atwood
The solvothermal synthesis of two M7L2 metal-organic nanocapsules from C-alkyl pyrogallol[3]resorcin[1]arene is reported. Using mixed macrocycles as building blocks shows great potential in the discovery of new metal-organic nanocapsules with novel properties.
August 15, 2017: Chemical Communications: Chem Comm
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