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https://www.readbyqxmd.com/read/30517904/magnetically-propelled-hydrogel-particle-motors-produced-by-ultrasound-assisted-hydrodynamic-electrospray-ionization-jetting
#1
Sven Rutkowski, Ling Mu, Tieyan Si, Meiyu Gai, Mengmeng Sun, Johannes Frueh, Qiang He
One of the most promising future applications of hydrogels is drug delivery. The hydrogels act as a biomedical cargo model to reach the target and release drugs to cure diseases. This application requires no side effects of the hydrogel and the ability to pass through porous media (e.g. membranes, interstitial tissue etc.) with nanoscaled channels. At the same time, the hydrogel must be mass-producible in an economic way. In this work, we show that hydrodynamic electrospray ionization jetting combined with ultrasound can fulfill these high requirements...
November 28, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/30516854/cocktail-strategy-based-on-spatio-temporally-controlled-nano-device-improves-therapy-of-breast-cancer
#2
Tianqun Lang, Yiran Liu, Zhong Zheng, Wei Ran, Yihui Zhai, Qi Yin, Pengcheng Zhang, Yaping Li
Metastatic breast cancer may be resistant to chemo-immunotherapy due to the existence of cancer stem cells (CSC). And the control of particle size and drug release of a drug carrier for multidrug combination is a key issue influencing therapy effect. Here, a cocktail strategy is reported, in which chemotherapy against both bulk tumor cells and CSC and immune checkpoint blockade therapy are intergraded into one drug delivery system. The chemotherapeutic agent paclitaxel (PTX), the anti-CSC agent thioridazine (THZ), and the PD-1/PD-L1 inhibitor HY19991 (HY) are all incorporated into an enzyme/pH dual-sensitive nanoparticle with a micelle-liposome double-layer structure...
December 5, 2018: Advanced Materials
https://www.readbyqxmd.com/read/30516412/in-vivo-study-of-mpeg-pcl-as-a-nanocarriers-for-anti-inflammatory-drug-delivery-of-simvastatin
#3
Mostafa Zamani, Amin Shirinzadeh, Mozhgan Aghajanzadeh, Sina Andalib, Hossein Danafar
PURPOSE: In this study, methoxy poly (ethylene glycol) -poly (ε-caprolactone) (mPEG-PCL) di block copolymers were synthesized. The purpose of this work is to investigate the in vivo anti-inflammatory effects of simvastatin-loaded micelles. METHODS: The structure of synthesized copolymers were characterized by using HNMR, FTIR and GPC techniques. Simvastatin was encapsulated in micelles through a single-step nano-precipitation method, leading to formation of simvastatin-loaded mPEG-PCL (simvastatin-mPEG-PCL) micelles...
December 5, 2018: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/30516220/the-equilibrium-structure-of-self-assembled-protein-nano-cages
#4
Sanaz Panahandeh, Siyu Li, Roya Zandi
Understanding how highly symmetric, robust, monodisperse protein nano-cages self-assemble can have major applications in various areas of bio-nanotechnology, such as drug delivery, biomedical imaging and gene therapy. We develop a model to investigate the assembly of protein subunits into the structures with different sizes and symmetries. Using Monte Carlo simulation, we obtain global minimum energy structures. Our results suggest that the physical properties including the spontaneous curvature, flexibility and bending rigidity of coat proteins are sufficient to predict the size, symmetry and shape selectivity of the assembly products...
December 5, 2018: Nanoscale
https://www.readbyqxmd.com/read/30515775/silk-nano-discs-a-natural-material-for-cancer-therapy
#5
Rahul Patwa, Narendren Soundararajan, Neha Mulchandani, Siddharth M Bhasney, Manisha Shah, Sachin Kumar, Amit Kumar, Vimal Katiyar
The article demonstrates the crystalline silk nano-discs (CSNs), with well-controlled morphology, which upon magnetization, yields magnetic crystalline silk nano-discs, making both prominent alternatives for replacing metal templates such as gold, silver, and so on in therapeutics and implants. The isolated β-sheet-rich discotic CSNs have ~50 nm diameter, high crystallinity (> 90%), and are insoluble but provide good dispersibility and stability in aqueous solutions. The melt blending-cum-electrospinning of functionalized CSN with poly(lactic acid) results in biocompatible nanofiber-based scaffolds having in vitro cell cytocompatibility with improved cell adhesion and proliferation...
November 2018: Biopolymers
https://www.readbyqxmd.com/read/30515626/correction-to-self-assembly-and-controlled-drug-release-of-a-nano-laminated-graphite-carbon-nitride-methotrexate-complex
#6
Shanshan Liu, Zhaoliang Guo, Xiongfeng Zeng, Xianguang Meng, Haina Sun, Yizao Wan, Guifu Zuo
The original version of this article unfortunately contained a mistake. In the Abstract section the sentence "Furthermore, the drug release mechanism was investigated by kinetic models and a first-order relationship was concluded, which indicated that the drug release is a simple diffusion process cohydroxyapatite/methotrexate complexntrolled by gradient drug concentration." was wrong. It should read as "Furthermore, the drug release mechanism was investigated by kinetic models and a first-order relationship was concluded, which indicated that the drug release is a simple diffusion process controlled by gradient drug concentration...
December 4, 2018: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/30506803/lecithin-soybean-phospholipid-nano-transfersomes-as-potential-carriers-for-transdermal-delivery-of-the-human-growth-hormone
#7
Maryam Kateh Shamshiri, Amir Abbas Momtazi-Borojeni, Mahvash Khodabandeh Shahraky, Fatemeh Rahimi
Pharmaceutical molecules such as peptides and proteins are usually injected into the body. Numerous efforts have been made to find new noninvasive ways to administer these peptides. In this study, highly flexible vesicles (transfersomes [TFs]) were designed as a new modern transdermal drug delivery system for systemic drug administration through the skin, which had also been evaluated in vitro. In this study, two growth hormone-loaded TF formulations were prepared, using soybean lecithin and two different surfactants; F1 _sodium deoxycholate and F 2 _sodium lauryl sulfate...
December 3, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/30505664/tat-functionalized-ag-fe-3-o-4-nano-composites-as-tissue-penetrating-vehicles-for-tumor-magnetic-targeting-and-drug-delivery
#8
Ergang Liu, Meng Zhang, Hui Cui, Junbo Gong, Yongzhuo Huang, Jianxin Wang, Yanna Cui, Weibing Dong, Lu Sun, Huining He, Victor C Yang
In this paper, we prepared a dual functional system based on dextrin-coated silver nanoparticles which were further attached with iron oxide nanoparticles and cell penetrating peptide (Tat), producing Tat-modified Ag-Fe3 O4 nanocomposites (Tat-FeAgNPs). To load drugs, an -SH containing linker, 3-mercaptopropanohydrazide, was designed and synthesized. It enabled the silver carriers to load and release doxorubicin (Dox) in a pH-sensitive pattern. The delivery efficiency of this system was assessed in vitro using MCF-7 cells, and in vivo using null BalB/c mice bearing MCF-7 xenograft tumors...
October 2018: Acta Pharmaceutica Sinica. B
https://www.readbyqxmd.com/read/30504656/-development-of-a-nano-dds-for-cancer-immunotherapy-based-on-llipid-nanoparticles
#9
Takashi Nakamura
The appearance of immune checkpoint inhibitors has been a major turning point in cancer therapy. The success of immune checkpoint therapy has revolutionized the field of cancer therapy, and immunotherapy has joined the cancer treatment ranks as a pillar. To induce effective anti-tumor immune responses, it is necessary both to enhance the activity of immune cells and to block immune suppression by tumor cells. Carrier type drug delivery systems based on nanobiotechnology (nano DDS) represent a potentially useful technology for efficiently achieving both: enhancement of the activity of immune cells and blocking immune suppression...
2018: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
https://www.readbyqxmd.com/read/30504381/evaluation-of-a-new-hydroxyapatite-nanoparticle-as-a-drug-delivery-system-to-oral-squamous-cell-carcinoma-cells
#10
Taku Murata, Tomohiko Kutsuna, Kazuto Kurohara, Kasumi Shimizu, Akira Tomeoku, Naoya Arai
BACKGROUND/AIM: Due to its abilities of substance adsorption and intracellular transportation, hydroxyapatite is a potential carrier in drug delivery systems (DDS). This in vitro study investigated whether newly-developed, highly-dispersive calcined hydroxyapatite nanoparticles with an average grain diameter of 20 nm (nano-SHAP) were suitable as a DDS for the drugs zoledronic acid (ZA), cisplatin, and carboplatin. MATERIAL AND METHODS: The effects of drug-bearing nano-SHAP on cell proliferation were assessed using three human oral squamous cell carcinoma cell lines (HSC-4, KOSC, and SAS) and one human breast cancer cell line (MCF-7)...
December 2018: Anticancer Research
https://www.readbyqxmd.com/read/30504367/targeted-therapies-for-pancreatic-cancer-and-hurdles-ahead
#11
REVIEW
Minela Aslan, Reza Shahbazi, Kezban Ulubayram, Bulent Ozpolat
Pancreatic ductal adenocarcinoma (PDAC) is one of the most aggressive and lethal cancers with a median survival of 6 months after diagnosis. Intrinsic resistance to chemotherapeutics and lack of effective targeted therapies are the major factors contributing to dismal prognosis. Several important genetic alterations (i.e., mutations, deletions) have been identified to be involved in the initiation and progression of pancreatic cancer, including KRAS and inactivation of tumor suppressors, such as TP53, SMAD4 and CDKN2A...
December 2018: Anticancer Research
https://www.readbyqxmd.com/read/30504054/a-novel-synthesis-of-selenium-nanoparticles-encapsulated-plga-nanospheres-with-curcumin-molecules-for-the-inhibition-of-amyloid-%C3%AE-aggregation-in-alzheimer-s-disease
#12
Xinlong Huo, Yongqiang Zhang, Xinchun Jin, Yongang Li, Li Zhang
The main factors of Alzheimer's disease (AD) are the cerebral accumulation and the formation of extracellular amyloid plaques. The Aβ peptides are highly able to accumulative and produce fibrils that are placed to form these plaques in the AD. The biological action and drug delivery properties of curcumin (Cur) nanoformulation in the Alzheimer's disease therapeutics can be developed by the altering surface of the Poly-lactide-co-glycolide (PLGA) polymer and encapsulation of selenium nanoparticles (Se NPs)...
November 15, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/30503561/stimuli-responsive-polymer-doxorubicin-conjugate-antitumor-mechanism-and-potential-as-nano-prodrug
#13
Kai Chen, Hao Cai, Hu Zhang, Hongyan Zhu, Zhongwei Gu, Qiyong Gong, Kui Luo
Polymer-drug conjugates has significantly improved the anti-tumor efficacy of chemotherapeutic drugs and alleviated their side effects. N-(1,3-dihydroxypropan-2-yl) methacrylamide (DHPMA) copolymer was synthesized via RAFT polymerization and polymer-doxorubicin (DOX) (diblock pDHPMA-DOX) were formed by conjugation, resulting in a self-aggregation-induced nanoprodrug with a favorable size of 21 nm and great stability. The nanoprodrug with a molecular weight (MW) of 95 kDa released drugs in response to tumor microenvironmental pH variations and they were enzymatically hydrolyzed into low MW segments (45 kDa)...
November 29, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/30502666/lamotrigine-encapsulated-intra-nasal-nanoliposome-formulation-for-epilepsy-treatment-formulation-design-characterization-and-nasal-toxicity-study
#14
Arshiya Praveen, Mohd Aqil, Syed Sarim Imam, Abdul Ahad, Thasleem Moolakkadath, Farhan J Ahmad
The purpose of this study was to develop lamotrigine nanoliposomes (LTG-NLs) for the treatment in seizures. The formulation was prepared using thin film hydration and rehydration method using the phospholipon 90 G, cholesterol and tween 80 as main ingredients. The nanoliposomes were optimized by plucket burman design (PBD) and response surface methodology (RSM) optimization techniques. The optimized LTGNLopt was further characterized for surface morphology, in-vitro release, stability study, confocal laser scanning microscopic (CLSM) study and naso toxicity study...
November 14, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/30502116/an-insight-into-medicinal-chemistry-of-anticancer-quinoxalines
#15
REVIEW
Tanu Kaushal, Gaurava Srivastava, Ashok Sharma, Arvind Singh Negi
Quinoxalines are benzopyrazines containing benzene and pyrazine rings fused together. In the recent past, quinoxalines have attracted Medicinal Chemists considerably for their syntheses and chemistry due to their distinct pharmacological activities. Diverse synthetic protocols have been developed via multicomponent reactions, single pot synthesis and combinatorial approach using efficient catalysts, reagents, and nano-composites etc. Further, the versatility of the quinoxaline core and its reasonable chemical simplicity devise it extremely promising source of bioactive compounds...
November 15, 2018: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/30488798/topical-nano-emulgel-for-skin-disorders-formulation-approach-and-characterization
#16
Javed Ahmad, Anuj Gautam, Shahadali Komath, Mehdiya Bano, Anuj Garg, Keerti Jain
BACKGROUNDS: Acne vulgaris is a common chronic skin disease that affects approximately 650 million people or about 9.4% of the population globally. Growing research in the area of nanotechnology over the years has now been exploited in management of various human disorders by their application in drug delivery. These approaches have an enormous opportunity for the designing of a novel, low-dose and effective treatment systems to control acne disease. Topical nanoemulsion-based gel preparations are said to have various benefits over the conventional formulations...
November 28, 2018: Recent Patents on Anti-infective Drug Discovery
https://www.readbyqxmd.com/read/30487642/synergistic-enzymatic-and-bioorthogonal-reactions-for-selective-prodrug-activation-in-living-systems
#17
Qingxin Yao, Feng Lin, Xinyuan Fan, Yanpu Wang, Ye Liu, Zhaofei Liu, Xingyu Jiang, Peng R Chen, Yuan Gao
Adverse drug reactions (ADRs) restrict the maximum doses applicable in chemotherapy, which leads to failure in cancer treatment. Various approaches, including nano-drug and prodrug strategies aimed at reducing ADRs, have been developed, but these strategies have their own pitfalls. A renovated strategy for ADR reduction is urgently needed. Here, we employ an enzymatic supramolecular self-assembly process to accumulate a bioorthogonal decaging reaction trigger inside targeted cancer cells, enabling spatiotemporally controlled, synergistic prodrug activation...
November 28, 2018: Nature Communications
https://www.readbyqxmd.com/read/30486979/oral-delivery-of-pingyangmycin-by-layer-by-layer-lbl-self-assembly-polyelectrolyte-grafted-nano-graphene-oxide
#18
Yu Liu, Jiajing Han, Hao Pan, Dechao Jia, Lijiang Chen, Xiaoyang Yang
With the increasing development in scientific technology, building a nanocarrier system for cancer drugs has become a bliss for cancer patients. To allow for the oral administration of hydrophilic drugs, a nanocarrier that was based on negatively charged graphene oxide (GO) and prepared through the Layer-by-Layer (LbL) self-assembly of poly(acrylic acid)-cysteine (PAA-cys) and poly(allylamine hydrochloride) (PAH) was established. In the present study, we demonstrated the excellent biological properties of GO, the biological adhesiveness of PAA-cys, and the protection and controlled release profiles of polyelectrolyte...
April 1, 2019: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/30486276/galactosylated-chitosan-functionalized-mesoporous-silica-nanoparticle-loading-by-calcium-leucovorin-for-colon-cancer-cell-targeted-drug-delivery
#19
Wei Liu, Fan Wang, Yongchao Zhu, Xue Li, Xiaojing Liu, Jingjing Pang, Weisan Pan
Targeted drug delivery to colon cancer cells can significantly improve the efficiency of treatment. We firstly synthesized carboxyl-modified mesoporous silica nanoparticles (MSN⁻COOH) via two-step synthesis, and then developed calcium leucovorin (LV)-loaded carboxyl-modified mesoporous silica nanoparticles based on galactosylated chitosan (GC), which are galectin receptor-mediated materials for colon-specific drug delivery systems. Both unmodified and functionalized nanoparticles were characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), nitrogen sorption, and dynamic light scattering (DLS)...
November 26, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/30483793/doxorubicin%C3%A2-loaded-dual%C3%A2-functional-hyaluronic-acid-nanoparticles-preparation-characterization-and-antitumor-efficacy-in-vitro-and-in-vivo
#20
Guixiang Tian, Xiue Sun, Jingkun Bai, Jinhua Dong, Bo Zhang, Zhiqin Gao, Jingliang Wu
A novel GHH copolymer was synthesized using hyaluronic acid modified with glycyrrhetinic acid and L‑histidine (His), and doxorubicin‑loaded GHH nanoparticles (DOX/GHH) were prepared for liver‑targeted drug delivery and pH‑responsive drug release. In the present study, GHH nanoparticles were characterized, and their pH‑responsive behaviors were evaluated at different pH levels. The antitumor effect of the DOX/GHH nanoparticles was investigated in vitro and in vivo. Results showed that the DOX/GHH nanoparticles were spherical, and the particle sizes ranged from 238...
November 22, 2018: Molecular Medicine Reports
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