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https://www.readbyqxmd.com/read/29458212/programmed-drug-delivery-system-based-on-optimized-size-decrease-and-hydrophilicity-hydrophobicity-transformation-for-enhanced-hepatocellular-carcinoma-therapy-of-doxorubicin
#1
Yuanyuan Liu, Lian Li, Lijia Li, Zhou Zhou, Fengling Wang, Xiaofeng Xiong, Rui Zhou, Yuan Huang
Requirements on drug delivery systems to surmount a complex series of pathophysiological barriers bear "cascading contradictions", especially size and hydrophilicity/hydrophobicity contradiction. Herein, a programmed drug delivery system (GNPs-Dox-Lac) based on optimized "size decrease and hydrophilicity/hydrophobicity transformation" was developed by combination the gelatin nanoparticle (GNPs) and prodrug Doxorubicin-Lactose (Dox-Lac). The results showed that GNPs-Dox-Lac (133.3 nm) were kinetically stable in blood circulation and inclined to accumulate at the tumor site...
February 16, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29456044/mesoporous-silica-nanoparticles-functionalized-with-hyaluronic-acid-effect-of-the-biopolymer-chain-length-on-cell-internalization
#2
Valentina Nairi, Silvia Magnolia, Marco Piludu, Mariella Nieddu, Cristian Antonio Caria, Valeria Sogos, Maria Vallet-Regì, Maura Monduzzi, Andrea Salis
Mesoporous silica nanoparticles (MSNs) were functionalized with amino groups (MSN-NH2 ) and then with hyaluronic acid, a biocompatible biopolymer which can be recognized by CD44 receptors in tumor cells, to obtain a targeting drug delivery system. To this purpose, three hyaluronic acid samples differing for the molecular weight, namely HAS (8-15 kDa), HAM (30-50 kDa) and HAL (90-130 kDa), were used. The MSN-HAS , MSN-HAM , and MSN-HAL materials were characterized through zeta potential and dynamic light scattering measurements at pH = 7...
February 12, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29453545/cytotoxicity-and-physiological-effects-of-silver-nanoparticles-on-marine-invertebrates
#3
Adriano Magesky, Émilien Pelletier
Silver nanoparticles (AgNPs) incorporation in commercial products is increasing due to their remarkable physical and chemical properties and their low cost on the market. Silver has been known for a long time to be highly toxic to bacterial communities, aquatic organisms, and particularly to marine biota. Strong chloro-complexes dominate Ag speciation in seawater and facilitate its persistence in dissolved form. It has a great impact on marine organisms because low concentration of silver can lead to strong bioaccumulation, partly because the neutral silver chloro complex (AgCl 0 ) is highly bioavailable...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29453544/molecular-and-cellular-toxicology-of-nanomaterials-with-related-to-aquatic-organisms
#4
Mohd Ashraf Rather, Irfan Ahmad Bhat, Niti Sharma, Rupam Sharma
The increasing application of nanomaterials both in commercial and industrial products has led their accumulation in the aquatic ecosystem. The rapid development and large scale production of nanomaterials in the last few decades have stimulated concerns regarding their potential environmental health risks on aquatic biota. Inorganic nanoparticles, due to their unique properties and associated material characteristics resulted in toxicity of these nanomaterials in aquatic organisms. Understanding their novel properties at nanoscale has established to be a significant aspect of their toxicity...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29453533/the-role-of-autophagy-in-nanoparticles-induced-toxicity-and-its-related-cellular-and-molecular-mechanisms
#5
Yubin Li, Dianwen Ju
In the past decades, nanoparticles have been widely used in industry and pharmaceutical fields for drug delivery, anti-pathogen, and diagnostic imaging purposes because of their unique physicochemical characteristics such as special ultrastructure, dispersity, and effective cellular uptake properties. But the nanotoxicity has been raised over the extensive applications of nanoparticles. Researchers have elucidated series of mechanisms in nanoparticles-induced toxicity, including apoptosis, necrosis, oxidative stress, and autophagy...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29452515/intelligent-anticancer-drug-delivery-performances-of-two-poly-n-isopropylacrylamide-based-magnetite-nanohydrogels
#6
Nahid Poorgholy, Bakhshali Massoumi, Marjan Ghorbani, Mehdi Jaymand, Hamed Hamishehkar
This article evaluates the anticancer drug delivery performances of two nanohydrogels composed of poly(N-isopropylacrylamide-co-itaconic anhydride) [P(NIPAAm-co-IA)], poly(ethylene glycol) (PEG), and Fe 3 O 4 nanoparticles. For this purpose, the magnetite nanohydrogels (MNHGs) were loaded with doxorubicin hydrochloride (DOX) as a universal anticancer drug. The morphologies and magnetic properties of the DOX-loaded MNHGs were investigated using transmission electron microscopy (TEM) and vibrating-sample magnetometer (VSM), respectively...
February 16, 2018: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/29452131/synergism-between-a-cell-penetrating-peptide-and-a-ph-sensitive-cationic-lipid-in-efficient-gene-delivery-based-on-double-coated-nanoparticles
#7
Ikramy A Khalil, Seigo Kimura, Yusuke Sato, Hideyoshi Harashima
We report on the development of a highly efficient gene delivery system based on synergism between octaarginine (R8), a representative cell penetrating peptide, and YSK05, a recently developed pH-sensitive cationic lipid. Attaching a high density of R8 on the surface of YSK05 nanoparticles (NPs) that contained encapsulated plasmid DNA resulted in the formation of positively charged NPs with improved transfection efficiency. To avoid the development of a net positive charge, we controlled the density and topology of the R8 peptide through the use of a two-step coating methodology, in which the inner lipid coat was modified with a low density of R8 which was then covered with an outer neutral YSK05 lipid layer...
February 13, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29445792/understanding-receptor-mediated-endocytosis-of-elastic-nanoparticles-through-coarse-grained-molecular-dynamic-simulation
#8
Zhiqiang Shen, Huilin Ye, Ying Li
For nanoparticle (NP)-based drug delivery platforms, the elasticity of the NPs has a significant influence on their blood circulation time and cellular uptake efficiency. However, due to the complexity of the endocytosis process and the inconsistency in the definition of elasticity for NPs in experiments, the understanding about the receptor-mediated endocytosis process of elastic NPs is still limited. In this work, we developed a coarse-grained molecular dynamics (CGMD) model for elastic NPs. The energy change of the elastic NPs can be precisely controlled by the bond, area, volume and bending potentials of this CGMD model...
February 15, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29442900/doxorubicin-loaded-silica-nanoparticles-with-dual-modification-as-a-tumor-targeted-drug-delivery-system-for-colon-cancer-therapy
#9
Yong-Quan Lin, Jing Zhang, Shi-Jiang Liu, Hui Ye
In the following study, we describe the preparation and characterization of poly(ethylene glycol) (PEG) and biotin modified, doxorubicin (DOX) loaded silica nanoparticles (Dox/SLN-PEG-Biotin), which was employed as a drug delivery system for colon cancer therapy. The DOX/SLN-PEG-Biotin exhibited small particle size and low cytotoxicity in vitro. Moreover, the Dox releases from DOX/SLN-PEG-Biotin followed a redox-sensitive behavior. Biotin functionalized Dox/SLN-PEG-Biotin demonstrated tumor-targeted delivery of their payload, resulting in enhanced cellular uptake in HCT116 tumor cells and potentiated tumor accumulation in HCT116 tumor-bearing mice...
April 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29442810/one-pot-facile-synthesis-of-pt-nanoparticles-using-cultural-filtrate-of-microgravity-simulated-grown-p-chrysogenum-and-their-activity-on-bacteria-and-cancer-cells
#10
Sivakumar Allur Subramaniyan, Sunirmal Sheet, Mohanraj Vinothkannan, Dong Jin Yoo, Yang Soo Lee, Shah Ahmed Belal, Kwan Seob Shim
Platinum nanoparticles (Pt NPs) was synthesized via a facile and cost competitive ont-pot green mediated synthesis using cell free cultural filtrate (microgravity simulated grown Penicillium chrysogenum) as a reducing agent. The toxicity effect of synthesized Pt NPs toward myoblast C2C12 carcinoma cells was then investigated. The particle size analyzer (DLS) and transmission electron microscopy (TEM) results demonstrates that both NG-Pt NPs and MG-Pt NPS are spherical in shape with an average diameter of 15 nm and 8...
May 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29442806/hetero-functionalized-gold-nanoparticles-to-silence-au-rich-element-containing-mrnas-in-rage-expressing-inflammatory-cells-preparation-characterization-and-in-vitro-evaluation
#11
Gokila Devi Mathialagan, Narkunaraja Shanmugam
Diabetes, a chronic metabolic disorder associated with significantly accelerated rates of inflammation. Gold nanoparticle plays a crucial role in biomedical applications. We described the development of hetero-functionalized gold nanoparticles (hfAuNPs) for targeted selective gene silencing by RNAi interference. This hfAuNPs was developed by parallelly conjugating biotinylated ARE-siRNA (siRNA to Adenosine Uridine-rich elements) and biotinylated RAGE interacting-peptide (RIP) to streptavidin coated gold nanoparticles (aAuNPs) thus forms a complex that provides biocompatibility and functionality in a physiological environment...
May 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29442706/human-adipose-derived-stem-cells-and-osteoblasts-interaction-with-fe-cr-nb-b-magnetic-nanoparticles
#12
Luminita Simion Labusca, Dumitru-Daniel Herea, Ecaterina Radu, Camelia Danceanu, Horia Chiriac, Nicoleta Lupu
The use of materials at nanoscale is currently of increasing interest for life sciences and medicine. Magnetic nanoparticles (MNPs) are under scrutiny for a large array of applications in nanomedicine as diagnostic and therapeutic tools. Proprietary Fe-Cr-Nb-B MNPs display heating properties that recommends them as potent agents for delivery of local hyperthermia for the treatment of solid tumours. Stem cell mediated delivery represents a safe and accurate modality to target remote or metastatic tumour sites...
July 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29442632/a-facile-way-to-increase-the-cellular-uptake-efficiency-of-hybrid-nanoparticles
#13
Yihua Yang, Yingcai Meng, Enbo Zhang, Jinsong Ding
Lipid-polymer hybrid nanoparticles composed of polymer cores and lipid shells have been intensively studied as cancer drug delivery systems. The aim of the present study was to investigate the effect of phosphatidylcholine (PC) on physicochemical properties, stability and cellular uptake of lipid-poly(lactic-co-glycolic acid) (PLGA) hybrid nanoparticles. Coumarin-6 (cou-6) loaded hybrid nanoparticles (NPs) were prepared using PC with different alkyl chain lengths from C12 to C18, and were characterized by transmission electron microscopy (TEM), dynamic light scattering (DLS), and encapsulation efficiency (EE)...
July 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29441706/new-strategies-in-the-design-of-nanomedicine-to-oppose-uptake-by-the-mononuclear-phagocyte-system-for-enhancing-cancer-therapeutic-efficacy
#14
Yiming Zhou, Zhifei Dai
The application of nanotechnology in tumor treatment has boomed the vigorous development in cancer nanomedicine. In spite of the great success has been achieved in this field, the nanomedicine has not realized its full potential owing to a delivery barrier, the mononuclear phagocytic system (MPS), which cuts off more than 95 % of the administrated nanoparticles. This results in an extremely low drug delivery efficacy to the tumor, leading to poor therapeutic outcomes. Moreover, the excessive injection of nanoparticles also raises toxicity concern caused by the accumulation of nanomaterials in the organs like liver and spleen...
February 13, 2018: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/29441466/hyaluronic-acid-grafted-plga-nanoparticles-for-the-sustained-delivery-of-berberine-chloride-for-an-efficient-suppression-of-ehrlich-ascites-tumors
#15
Priyanka Bhatnagar, Manisha Kumari, Richa Pahuja, A B Pant, Y Shukla, Pradeep Kumar, K C Gupta
To promote the specific targeting and elimination of CD44-positive cancer cells, berberine chloride (BRB)-encapsulated hyaluronic acid-grafted poly(lactic-co-glycolic acid) copolymer (BRB-d(HA)-g-PLGA) nanoparticles (NPs) were prepared. The targeted action of these NPs was compared to non-targeted BRB-loaded PLGA NPs and bulk BRB. The in vitro studies demonstrated faster release of BRB and increased cytotoxicity of BRB-d(HA)-g-PLGA NPs in Hela and MCF-7 cells in comparison to BRB-PLGA NPs and bulk BRB. The uptake of BRB-d(HA)-g-PLGA NPs was increased in case of MCF-7 cells as compared to HeLa cells owing to the higher expression of CD44 receptors on MCF-7 cells...
February 13, 2018: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/29440896/intranasal-delivery-of-huperzine-a-to-the-brain-using-lactoferrin-conjugated-n-trimethylated-chitosan-surface-modified-plga-nanoparticles-for-treatment-of-alzheimer-s-disease
#16
Qingqing Meng, Aiping Wang, Hongchen Hua, Ying Jiang, Yiyun Wang, Hongjie Mu, Zimei Wu, Kaoxiang Sun
Background: Safe and effective delivery of therapeutic drugs to the brain is important for successful therapy of Alzheimer's disease (AD). Purpose: To develop Huperzine A (HupA)-loaded, mucoadhesive and targeted polylactide-co-glycoside (PLGA) nanoparticles (NPs) with surface modification by lactoferrin (Lf)-conjugated N-trimethylated chitosan (TMC) (HupA Lf-TMC NPs) for efficient intranasal delivery of HupA to the brain for AD treatment. Methods: HupA Lf-TMC NPs were prepared using the emulsion-solvent evaporation method and optimized using the Box-Behnken design...
2018: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29440698/gold-nanoparticles-enabled-efficient-dual-delivery-of-anticancer-therapeutics-to-hela-cells
#17
Muhammad U Farooq, Valentyn Novosad, Elena A Rozhkova, Hussain Wali, Asghar Ali, Ahmed A Fateh, Purnima B Neogi, Arup Neogi, Zhiming Wang
Colloidal gold nanoparticles (AuNPs) are of interest as non-toxic carriers for drug delivery owing to their advanced properties, such as extensive surface-to-volume ratio and possibilities for tailoring their charge, hydrophilicity and functionality through surface chemistries. To date, various biocompatible polymers have been used for surface decoration of AuNPs to enhance their stability, payloads capacity and cellular uptake. This study describes a facile one-step method to synthesize stable AuNPs loaded with combination of two anticancer therapeutics, -bleomycin and doxorubicin...
February 13, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29436549/enhanced-delivery-of-sirna-to-triple-negative-breast-cancer-cells-in-vitro-and-in-vivo-through-functionalizing-lipid-coated-calcium-phosphate-nanoparticles-with-dual-target-ligands
#18
Jie Tang, Christopher B Howard, Stephen M Mahler, Kristofer J Thurecht, Leaf Huang, Zhi Ping Xu
The conjugation of ligands to nanoparticle platforms for the target delivery of therapeutic agents to the tumor tissue is one of the promising anti-cancer strategies. However, conventional nanoparticle platforms are not so effective in terms of the selectivity and transfection efficiency. In this study, we designed and developed a dual-target drug/gene delivery system based on lipid-coated calcium phosphate (LCP) nanoparticles (NPs) for significantly enhanced siRNA cellular uptake and transfection efficiency...
February 13, 2018: Nanoscale
https://www.readbyqxmd.com/read/29435134/silver-nanoparticles-of-different-sizes-induce-a-mixed-type-of-programmed-cell-death-in-human-pancreatic-ductal-adenocarcinoma
#19
Ewelina Zielinska, Agata Zauszkiewicz-Pawlak, Michal Wojcik, Iwona Inkielewicz-Stepniak
Pancreatic ductal adenocarcinoma, with the high resistance to chemotherapeutic agents, remains the fourth leading cause of cancer-death in the world. Due to the wide range of biological activity and unique properties, silver nanoparticles (AgNPs) are indicated as agents with potential to overcome barriers involved in chemotherapy failure. Therefore, in our study we decided to assess the ability of AgNPs to kill pancreatic cancer cells, and then to identify the molecular mechanism underlying this effect. Moreover, we evaluated the cytotoxicity of AgNPs against non-tumor cell of the same tissue (hTERT-HPNE cells) for comparison...
January 12, 2018: Oncotarget
https://www.readbyqxmd.com/read/29433753/a-glutathione-responsive-sulfur-dioxide-polymer-prodrug-as-a-nanocarrier-for-combating-drug-resistance-in-cancer-chemotherapy
#20
Wei Shen, Wanguo Liu, Huailin Yang, Peng Zhang, Chunsheng Xiao, Xuesi Chen
Multidrug resistance (MDR) in cancer remains a significant challenge for curing cancer by chemotherapy. In this work, a kind of glutathione (GSH)-responsive polymer prodrug of SO2 was designed and synthesized, which presented synergistic effect with doxorubicin (DOX) for combating MCF-7 ADR human breast cancer cell. Firstly, a small molecular prodrug of SO2, N-(3-azidopropyl)-2,4-dinitrobenzenesulfonamide (AP-DNs), was chemically conjugated onto the side chain of methoxy poly (ethylene glycol)-block-poly (γ-propargyl-l-glutamate) (mPEG-PPLG) block copolymer to generate an amphiphilic polymer prodrug of SO2, mPEG-PLG (DNs)...
February 3, 2018: Biomaterials
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