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Post-loaded nanoparticle

Kyle T Householder, Danielle M DiPerna, Eugene P Chung, Anne Rosa Luning, Duong T Nguyen, Sarah E Stabenfeldt, Shwetal Mehta, Rachael W Sirianni
Histone deacetylases (HDACs) are known to be key enzymes in cancer development and progression through their modulation of chromatin structure and the expression and post-translational modification of numerous proteins. Aggressive dedifferentiated tumors, like glioblastoma, frequently overexpress HDACs, while HDAC inhibition can lead to cell cycle arrest, promote cellular differentiation and induce apoptosis. Although multiple HDAC inhibitors, such as quisinostat, are of interest in oncology due to their potent in vitro efficacy, their failure in the clinic as monotherapies against solid tumors has been attributed to poor delivery...
February 24, 2018: Colloids and Surfaces. B, Biointerfaces
Reza Naeimi, Fatemeh Safarpour, Mona Hashemian, Hamed Tashakorian, Seyed Raheleh Ahmadian, Manouchehr Ashrafpour, Maryam Ghasemi-Kasman
Curcumin has been introduced as effective anti-inflammatory agent in treatment of several inflammatory disorders. Despite the wide range pharmacological activities, clinical application of curcumin is restricted mainly due to the low water solubility of this substance. More recently, we could remarkably improve the aqueous solubility of curcumin by its encapsulation in chitosan-alginate-sodium tripolyphosphate nanoparticles (CS-ALG-STPP NPs). In this study, the anti-inflammatory and myelin protective effects of curcumin-loaded NPs were evaluated in lysolecithin (LPC)-induced focal demyelination model...
March 9, 2018: Neuroscience Letters
Liga Saulite, Karlis Pleiko, Ineta Popena, Dominyka Dapkute, Ricardas Rotomskis, Una Riekstina
We created a 3D cell co-culture model by combining nanoengineered mesenchymal stem cells (MSCs) with the metastatic breast cancer cell line MDA-MD-231 and primary breast cancer cell line MCF7 to explore the transfer of quantum dots (QDs) to cancer cells. First, the optimal conditions for high-content QD loading in MSCs were established. Then, QD uptake in breast cancer cells was assessed after 24 h in a 3D co-culture with nanoengineered MSCs. We found that incubation of MSCs with QDs in a serum-free medium provided the best accumulation results...
2018: Beilstein Journal of Nanotechnology
Cláudia Saraiva, Daniela Talhada, Akhilesh Rai, Raquel Ferreira, Lino Ferreira, Liliana Bernardino, Karsten Ruscher
There is a high quest for novel therapeutic strategies to enhance recovery after stroke. MicroRNA-124 (miR-124) has been described as neuroprotective and anti-inflammatory molecule. Moreover, miR-124 is a well described enhancer of adult neurogenesis that could offer potentially beneficial effects. Herein, we used miR-124-loaded nanoparticles (miR-124 NPs) to evaluate their therapeutic potential in an in vitro and in vivo model of stroke. For that, neuroprotective and neurogenic responses were assessed in an in vitro model of stroke...
2018: PloS One
Yang Qiao, Joy Gumin, Christopher J MacLellan, Feng Gao, Richard Bouchard, Frederick F Lang, R Jason Stafford, Marites P Melancon
OBJECTIVE: To evaluate the feasibility of visualizing bone marrow-derived human mesenchymal stem cells (MSCs) labeled with a gold-coated magnetic resonance (MR)-active multifunctional nanoparticle and injected via the carotid artery for assessing the extent of MSC homing in glioma-bearing mice. MATERIALS AND METHODS: Nanoparticles containing superparamagnetic iron oxide coated with gold (SPIO@Au) with a diameter of ∼82 nm and maximum absorbance in the near infrared region were synthesized...
April 20, 2018: Nanotechnology
Devang R Amin, Caroline Sugnaux, King Hang Aaron Lau, Phillip B Messersmith
As synthetic analogs of the natural pigment melanin, polydopamine nanoparticles (NPs) are under active investigation as non-toxic anticancer photothermal agents and as free radical scavenging therapeutics. By analogy to the widely adopted polydopamine coatings, polydopamine NPs offer the potential for facile aqueous synthesis and incorporation of (bio)functional groups under mild temperature and pH conditions. However, clear procedures for the convenient and reproducible control of critical NP properties such as particle diameter, surface charge, and loading with functional molecules have yet to be established...
September 2017: Biomimetics (Basel)
Michele Miragoli, Paola Ceriotti, Michele Iafisco, Marco Vacchiano, Nicolò Salvarani, Alessio Alogna, Pierluigi Carullo, Gloria Belén Ramirez-Rodríguez, Tatiana Patrício, Lorenzo Degli Esposti, Francesca Rossi, Francesca Ravanetti, Silvana Pinelli, Rossella Alinovi, Marco Erreni, Stefano Rossi, Gianluigi Condorelli, Heiner Post, Anna Tampieri, Daniele Catalucci
Peptides are highly selective and efficacious for the treatment of cardiovascular and other diseases. However, it is currently not possible to administer peptides for cardiac-targeting therapy via a noninvasive procedure, thus representing scientific and technological challenges. We demonstrate that inhalation of small (<50 nm in diameter) biocompatible and biodegradable calcium phosphate nanoparticles (CaPs) allows for rapid translocation of CaPs from the pulmonary tree to the bloodstream and to the myocardium, where their cargo is quickly released...
January 17, 2018: Science Translational Medicine
Saumya Nigam, D Bahadur
This work evaluates the magnetically-guided delivery of DOX-loaded dendritic-Fe3O4 nanoparticles and their tumor regression efficacy in subcutaneous melanoma in C57BL/6 mice. The hematological, biochemical and histopathological parameters were minimally affected. The nanoparticles localized in lungs, liver and spleen suggesting non-specific uptake. However, in tumor-bearing mice, substantially higher localization in magnetically-targeted tumor was observed when compared to passive localization in non-targeted tumor...
January 12, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
Eugenia Li Ling Yeo, Patricia Soo Ping Thong, Khee Chee Soo, James Chen Yong Kah
The protein corona is inevitably formed on nanoparticles (NPs) when they are introduced in vivo and has been associated with a reduction in targeting yield, immune recognition and rapid blood clearance, leading to poor tumor accumulation. We have recently shown that it is possible to exploit the protein corona for drug delivery by exploiting it for loading and triggering the release of a photosensitizer Chlorin e6 (Ce6) for simultaneous photodynamic (PDT) and photothermal therapy (PTT) in vitro. Here, we extended our previous in vitro studies to evaluate its effectiveness in vivo...
January 16, 2018: Nanoscale
Uson Laura, Manuel Arruebo, Victor Sebastian
The continuous production of Pt-based heterogeneous catalysts based on ultra-small (<2 nm) noble metal nanoparticles deposited on mesoporous ordered silica and their catalytic activity in VOC abatement are here reported. Microfluidic reactors can be used not only to enable the fast and controlled production of ultra-small Pt nanoparticles (NPs), but also alloyed NPs including PtPd, PtRu and PtRh can be formed in short residence times (between 60 s and 5 min). A novel continuous and homogeneous loading of these catalytic NPs on SBA-15 used as a mesoporous support is also here reported...
January 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Rania A H Ishak, Nada M Mostafa, Amany O Kamel
The blood-brain barrier is considered the leading physiological obstacle hindering the transport of neurotherapeutics to brain cells. The application of nanotechnology coupled with surfactant coating is one of the efficacious tactics overcoming this barrier. The aim of this study was to develop lipid polymer hybrid nanoparticles (LPHNPs), composed of a polymeric core and a phospholipid shell entangled, for the first time, with PEG-based surfactants (SAA) viz. TPGS or Solutol HS 15 in comparison with the gold standard Tween 80, aiming to enhance brain delivery and escape opsonization...
November 2017: Drug Delivery
Annika Ottersbach, Olga Mykhaylyk, Alexandra Heidsieck, Dietmar Eberbeck, Sarah Rieck, Katrin Zimmermann, Martin Breitbach, Britta Engelbrecht, Tobias Brügmann, Michael Hesse, Armin Welz, Philipp Sasse, Daniela Wenzel, Christian Plank, Bernhard Gleich, Michael Hölzel, Wilhelm Bloch, Alexander Pfeifer, Bernd K Fleischmann, Wilhelm Roell
Cell replacement in the heart is considered a promising strategy for the treatment of post-infarct heart failure. Direct intramyocardial injection of cells proved to be the most effective application route, however, engraftment rates are very low (<5%) strongly hampering its efficacy. Herein we combine magnetic nanoparticle (MNP) loading of EGFP labeled embryonic cardiomyocytes (eCM) and embryonic stem cell-derived cardiomyocytes (ES-CM) with application of custom designed magnets to enhance their short and long-term engraftment...
February 2018: Biomaterials
Yongdan Zhao, Qingle Song, Yijia Yin, Tingting Wu, Xiaomeng Hu, Xueqin Gao, Gao Li, Songwei Tan, Zhiping Zhang
The efficacy of immunotherapy was demonstrated to be compromised by reduced immunogenicity of tumor cells and enhanced suppressive properties of the tumor microenvironment in cancer treatment. There is growing evidence that low-dose chemotherapy can modulate the immune system to improve the anti-tumor effects of immunotherapy through multiple mechanisms, including the enhancement of tumor immunogenicity and reversal of the immunosuppressive tumor microenvironment. Here, we fabricated thermosponge nanoparticles (TSNs) for the co-delivery of chemotherapeutic drug paclitaxel (PTX) and immunostimulant interleukin-2 (IL-2) to explore the synergistic anti-tumor effects of chemotherapy and immunotherapy...
January 10, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
Y Y Liu, C Wang, P F Luo, Z F Xia
Objective: To establish 3-{4-[2-hydroxyl-(1-methylethylamino) propoxy] phenyl} propionic acid cetylesters (PAC) modified nanoparticles, and preliminarily explore its cardiomyocyte-targeting function and protection effects on myocardium. Methods: (1) HL-1 myocardial cells were divided into cyanidin-3 (Cy3) marked non-targeted small interference RNA (Cy3-siNC) group and Cy3 marked small interference RNA designed for the nuclear factor kappa B (NF-κB)-p65 gene (Cy3-si435) group according to the random number table, with 3 wells in each group...
November 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
Yangyun Wang, Yibin Deng, Huanhuan Luo, Aijun Zhu, Hengte Ke, Hong Yang, Huabing Chen
Stimuli-responsive nanostructures have shown great promise for intracellular delivery of anticancer compounds. A critical challenge remains in the exploration of stimuli-responsive nanoparticles for fast cytoplasmic delivery. Herein, near-infrared (NIR) light-responsive nanoparticles were rationally designed to generate highly efficient cytoplasmic delivery of anticancer agents for synergistic thermo-chemotherapy. The drug-loaded polymeric nanoparticles of selenium-inserted copolymer (I/D-Se-NPs) were rapidly dissociated in several minutes through reactive oxygen species (ROS)-mediated selenium oxidation upon NIR light exposure, and this irreversible dissociation of I/D-Se-NPs upon such a short irradiation promoted continuous drug release...
November 20, 2017: ACS Nano
Jugal P Dhandhukia, Zhe Li, Santosh Peddi, Shruti Kakan, Arjun Mehta, David Tyrpak, Jordan Despanie, J Andrew MacKay
Recombinant Elastin-Like Polypeptides (ELPs) serve as attractive scaffolds for nanoformulations because they can be charge-neutral, water soluble, high molecular weight, monodisperse, biodegradable, and decorated with functional proteins. We recently reported that fusion of the FK-506 binding protein 12 (FKBP) to an ELP nanoparticle (FSI) reduces rapamycin (Rapa) toxicity and enables intravenous (IV) therapy in both a xenograft breast cancer model and a murine autoimmune disease model. Rapa has poor solubility, which leads to variable oral bioavailability or drug precipitation following parenteral administration...
2017: Theranostics
Junghyun Kim, Zhi-Xiang Luo, Yue Wu, Xiuling Lu, Michael Jay
Radionuclide therapy with nano-sized carriers is a very promising approach to treat various types of cancer. The preparation of radioactive nanocarriers can be achieved with minimum handling using a neutron-activation approach. However, the nanocarrier material must possess certain characteristics such as low density, heat-resistance, high metal adsorption, easy surface modification and low toxicity in order to be useful. Mesoporous Carbon Nanoparticles (MCNs) in which holmium oxide is formed in their pores by a wet-impregnation process are investigated as a suitable material for this application...
June 2017: Carbon
Zulaikha A Busari, Kabiru A Dauda, Olajumoke A Morenikeji, Funmilayo Afolayan, Oyetunde T Oyeyemi, Jairam Meena, Debasis Sahu, Amulya K Panda
Curcumin is a polyphenolic pigment isolated from the rhizomes of Curcuma longa (turmeric), a medicinal plant widely used in the ancient Indian and Chinese medicine. The antiplasmodial activity of curcumin is often hampered by its fast metabolism and poor water solubility, thus its incorporation into a delivery system could circumvent this problem. This study aimed to evaluate the in vivo antiplasmodial activity and the toxicity assessment of curcumin incorporated into poly (lactic-co-glycolic) acid (PLGA) nanoparticles...
2017: Frontiers in Pharmacology
Yechao Su, Luyao Ma, Jian Chen, Jianhong Xu
To maintain stability and activity in Heck-coupling reaction, a novel composite carrier with controllable uniform size, high complex ability and mechanical intensity was fabricated in microchannel using natural N-doped biomolecule chitosan and silica as ingredients. Post carbonization increased its thermal stability and supported Pd@C/silica catalysts can be acquired after Pd loading. Only 2mg supported Pd@C/silica catalysts (0.44μmol) can achieve high yield (>95%) in a typical Heck-coupling reaction and maintained activity even after 8 times of recycling...
November 1, 2017: Carbohydrate Polymers
Cem Varan, Erem Bilensoy
Background: Brain tumors are the most common tumors among adolescents. Although some chemotherapeutics are known to be effective against brain tumors based on cell culture studies, the same effect is not observed in clinical trials. For this reason, the development of drug delivery systems is important to treat brain tumors and prevent tumor recurrence. The aim of this study was to develop core-shell polymeric nanoparticles with positive charge by employing a chitosan coating. Additionally, an implantable formulation for the chemotherapeutic nanoparticles was developed as a bioadhesive film to be applied at the tumor site following surgical operation for brain glioma treatment...
2017: Beilstein Journal of Nanotechnology
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