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https://read.qxmd.com/read/30776589/development-of-curcumin-loaded-gemini-surfactant-nanoparticles-synthesis-characterization-and-evaluation-of-anticancer-activity-against-human-breast-cancer-cell-lines
#1
Mina Karimpour, Mohammad Ali Hosseinpour Feizi, Majid Mahdavi, Barbara Krammer, Thomas Verwanger, Farhood Najafi, Esmaeil Babaei
BACKGROUND: Curcumin, the polyphenolic constituent of turmeric, has been recognized as an effective anticancer agent in the treatment of breast cancer. However, the poor bioavailability of curcumin triggers finding of new approaches for elevating its therapeutic efficiency. PURPOSE: We aimed to use gemini surfactant nanocarriers for curcumin in order to overcome its limitations. STUDY DESIGN: We investigated the in vitro characterization of gemini surfactant-curcumin (Gemini-Cur) and examined its antiproliferative & apoptotic activities on breast cancer cell lines...
November 15, 2018: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://read.qxmd.com/read/30776382/simultaneous-analysis-of-dissolution-and-permeation-profiles-of-nano-and-microsized-formulations-of-indomethacin-using-the-in-vitro-dissolution-absorption-system-2-idas2
#2
Jibin Li, Li-Bin Li, Nourdine Nessah, Yuehua Huang, Carlos Hidalgo, Albert Owen, Ismael J Hidalgo
The in vitro dissolution absorption system (IDAS2), a recent invention comprised of a conventional dissolution vessel containing two permeation chambers with Caco-2 cell monolayers mounted with their apical side facing the dissolution media, permits simultaneous measurement of dissolution and permeation of drugs from intact clinical dosage forms. The objectives of this study were 1) to assess the utility of IDAS2 in the determination of the effect of particle size on in vitro performance of indomethacin and 2) to find out whether the behavior in IDAS2 of two indomethacin products differing in particle size is correlated with their in vivo behavior...
February 15, 2019: Journal of Pharmaceutical Sciences
https://read.qxmd.com/read/30774143/detection-of-endotoxin-in-nano-formulations-using-limulus-amoebocyte-lysate-lal-assays
#3
Barry W Neun, Marina A Dobrovolskaia
When present in pharmaceutical products, a Gram-negative bacterial cell wall component endotoxin (often also called lipopolysaccharide) can cause inflammation, fever, hypo- or hypertension, and, in extreme cases, can lead to tissue and organ damage that may become fatal. The amounts of endotoxin in pharmaceutical products, therefore, are strictly regulated. Among the methods available for endotoxin detection and quantification, the Limulus Amoebocyte Lysate (LAL) assay is commonly used worldwide. While any pharmaceutical product can interfere with the LAL assay, nano-formulations represent a particular challenge due to their complexity...
January 30, 2019: Journal of Visualized Experiments: JoVE
https://read.qxmd.com/read/30772413/ureido-modified-carboxymethyl-chitosan-graft-stearic-acid-polymeric-nano-micelles-as-a-targeted-delivering-carrier-of-clarithromycin-for-helicobacter-pylori-preparation-and-in-vitro-evaluation
#4
Ying Cong, Jiayue Geng, Hongying Wang, Jing Su, Muhammad Arif, Quanjiang Dong, Zhe Chi, Chenguang Liu
The effect of antibiotics in the stomach for curing Helicobacter pylori infection is hampered by the adverse gastric environment and low bioavailability of the administered drugs. Concerning these challenges, a polymeric nano-micelle was developed. Initially, carboxymethyl chitosan (CMCS) was hydrophobically modified with stearic acid (SA), and the obtained CMCS-g-SA co-polymers was further conjugated with urea to acquire U-CMCS-g-SA co-polymers. Sphere-shaped nano-micelles (UCS-NMs) with the particle sizes of approximately 200 nm were obtained with the U-CMCS-g-SA co-polymers...
February 14, 2019: International Journal of Biological Macromolecules
https://read.qxmd.com/read/30771414/two-dimensional-cancer-theranostic-nanomaterials-synthesis-surface-functionalization-and-applications-in-photothermal-therapy
#5
REVIEW
Chandran Murugan, Varsha Sharma, Rajesh Kumar Murugan, Gnanasekar Malaimegu, Anandhakumar Sundaramurthy
In recent years, novel two-dimensional (2D) nanomaterials are of great interest for diverse potential applications such as device fabrication, energy storage, sensing and theranostics because of their superlative physical features namely, large surface area, minimal thickness, tunable composition and easier surface modification methods. Rapid exploration in design and fabrication of 2D nano-structures have opened new avenue for cancer theranostics as it can encapsulate group of cancer cells and inflict major damage with great specificity in a non-invasive manner...
February 13, 2019: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://read.qxmd.com/read/30771095/enhancing-curcumin-oral-bioavailability-through-nanoformulations
#6
Vinod S Ipar, Anisha Dsouza, Padma V Devarajan
Curcumin is a promising therapeutic agent that exhibits manifold therapeutic activities. However, it is challenging to study curcumin as it exhibits poor aqueous solubility and low permeability and it is a substrate for P-glycoprotein (P-gp). It is readily metabolized in the body, but many active metabolites of curcumin have been identified that could also be exploited for therapy. Strategies for the oral bioenhancement of curcumin to leverage the potential of curcumin as a therapeutic molecule are discussed here in light of these challenges...
February 15, 2019: European Journal of Drug Metabolism and Pharmacokinetics
https://read.qxmd.com/read/30770004/membrane-penetration-and-trapping-of-an-active-particle
#7
Abdallah Daddi-Moussa-Ider, Segun Goh, Benno Liebchen, Christian Hoell, Arnold J T M Mathijssen, Francisca Guzmán-Lastra, Christian Scholz, Andreas M Menzel, Hartmut Löwen
The interaction between nano- or micro-sized particles and cell membranes is of crucial importance in many biological and biomedical applications such as drug and gene delivery to cells and tissues. During their cellular uptake, the particles can pass through cell membranes via passive endocytosis or by active penetration to reach a target cellular compartment or organelle. In this manuscript, we develop a simple model to describe the interaction of a self-driven spherical particle (moving through an effective constant active force) with a minimal membrane system, allowing for both penetration and trapping...
February 14, 2019: Journal of Chemical Physics
https://read.qxmd.com/read/30769019/in-vitro-anthelmintic-effect-of-biologically-synthesized-silver-nanoparticles-on-liver-amphistome-gigantocotyle-explanatum
#8
Abdur Rehman, Rizwan Ullah, Imran Uddin, Iram Zia, Lubna Rehman, S M A Abidi
In order to ensure global food security a rationale approach is required to control all those factors which directly or indirectly affect the food productivity. The neglected helminthic diseases alone are responsible for huge economic losses to the agrarian stakeholders. The problem is further compounded by the emerging drug resistance in flukes against the commonly used anthelmintics like triclabendazole. Therefore, the search for alternatives including the nano-based approaches has become a necessity to develop future control strategies...
February 12, 2019: Experimental Parasitology
https://read.qxmd.com/read/30766781/drug-nanoclusters-formed-in-confined-nano-cages-of-cd-mof-dramatic-enhancement-of-solubility-and-bioavailability-of-azilsartan
#9
Yuanzhi He, Wei Zhang, Tao Guo, Guoqing Zhang, Wei Qin, Liu Zhang, Caifen Wang, Weifeng Zhu, Ming Yang, Xiaoxiao Hu, Vikramjeet Singh, Li Wu, Ruxandra Gref, Jiwen Zhang
Tremendous efforts have been devoted to the enhancement of drug solubility using nanotechnologies, but few of them are capable to produce drug particles with sizes less than a few nanometers. This challenge has been addressed here by using biocompatible versatile γ -cyclodextrin ( γ -CD) metal-organic framework (CD-MOF) large molecular cages in which azilsartan (AZL) was successfully confined producing clusters in the nanometer range. This strategy allowed to improve the bioavailability of AZL in Sprague-Dawley rats by 9...
January 2019: Acta Pharmaceutica Sinica. B
https://read.qxmd.com/read/30766777/emerging-transporter-targeted-nanoparticulate-drug-delivery-systems
#10
REVIEW
Hongyan Su, Yan Wang, Shuo Liu, Yue Wang, Qian Liu, Guangxuan Liu, Qin Chen
Transporter-targeted nanoparticulate drug delivery systems (nano-DDS) have emerged as promising nanoplatforms for efficient drug delivery. Recently, great progress in transporter-targeted strategies has been made, especially with the rapid developments in nanotherapeutics. In this review, we outline the recent advances in transporter-targeted nano-DDS. First, the emerging transporter-targeted nano-DDS developed to facilitate oral drug delivery are reviewed. These include improvements in the oral absorption of protein and peptide drugs, facilitating the intravenous-to-oral switch in cancer chemotherapy...
January 2019: Acta Pharmaceutica Sinica. B
https://read.qxmd.com/read/30763792/development-and-characterization-of-nanostructured-lipid-carrier-based-gels-for-the-transdermal-delivery-of-donepezil
#11
I T Mendes, A L M Ruela, F C Carvalho, J T J Freitas, R Bonfilio, G R Pereira
Donepezil is one of the main compounds used in the therapy of Alzheimer's disease. Oral administration of this drug presents many drawbacks, resulting in treatment non-adherence among patients. Thus, the development of transdermal formulations for donepezil delivery is important. The aim of this study was to prepare and to evaluate nanostructured lipid carrier-based gels (NLC gel) able to improve the skin delivery of donepezil free base (DPB). The components of nanostructured lipid carriers (NLCs) were selected after evaluating their enhancing effects using in vitro DPB skin delivery assays...
February 6, 2019: Colloids and Surfaces. B, Biointerfaces
https://read.qxmd.com/read/30763634/core-matched-nanoassemblies-for-targeted-co-delivery-of-chemotherapy-and-photosensitizer-to-treat-drug-resistant-cancer
#12
Di Jiang, Minjun Xu, Yuanyuan Pei, Yukun Huang, Yu Chen, Fenfen Ma, Huiping Lu, Jun Chen
Emergence of drug resistance in tumors causes therapeutic failure or tumor relapse. Combination of chemotherapy and photodynamic therapy holds significant promise to treat drug-resistant tumors. However, stubborn hydrophobicity of photosensitizer (PS), low encapsulation efficiency and leaking problem of PS in organic carrier, and disparate physicochemical properties of PS and chemotherapeutics make the combination unachievable. Thus how to efficiently co-deliver the two functional agents to enable photo-chemotherapy seems to be one of the key challenges...
February 11, 2019: Acta Biomaterialia
https://read.qxmd.com/read/30763071/nanovector-mediated-drug-delivery-in-spinal-cord-injury-a-multitarget-approach
#13
Simonetta Papa, Filippo Rossi, Irma Vismara, Gianluigi Forloni, Pietro Veglianese
Many pre-clinical studies seek cures for spinal cord injury (SCI) but when the results are translated to clinical trials they give scant efficacy. One possible reason is that most strategies use treatments directed toward a single pathological mechanism, while a multitherapeutic approach needs to be tested to significantly improve outcomes after SCI. Most of the pre-clinical reports gave better outcomes when a combination of different compounds was used instead of a single drug. This promising approach, however, must still be improved because it raises some criticism: i) the Blood-Spinal Cord barrier limits drug distribution, ii) it is hard to understand the interactions among the pharmacological components after systemic administration, iii) the timing of treatments is crucial: the spread of the lesion is a process finely regulated over time, so therapies must be scheduled at precise times during the post-injury course...
February 14, 2019: ACS Chemical Neuroscience
https://read.qxmd.com/read/30761901/golden-exosomes-selectively-target-brain-pathologies-in-neurodegenerative-and-neurodevelopmental-disorders
#14
Nisim Perets, Oshra Betzer, Ronit Shapira, Shmuel Brenstein, Ariel Angel, Tamar Sadan, Uri Ashery, Rachela Popovtzer, Daniel Offen
Exosomes, nano-vesicles that are secreted by different cell types, enable intercellular communication at local or distant sites. Though they have been found to cross the blood brain barrier, their migration and homing abilities within the brain remain unstudied. We have recently developed a method for longitudinal and quantitative in vivo neuroimaging of exosomes, based on the superior visualization abilities of classical X-ray computed tomography (CT), combined with gold nanoparticles as labeling agents. Here, we used this technique to track the migration and homing patterns of intranasally administrated exosomes derived from bone marrow mesenchymal stem cells (MSC-exo) in different brain pathologies, including stroke, autism, Parkinson's disease and Alzheimer's disease...
February 14, 2019: Nano Letters
https://read.qxmd.com/read/30759891/the-romp-a-powerful-approach-to-synthesize-novel-ph-sensitive-nanoparticles-for-tumor-therapy
#15
REVIEW
Philippe Bertrand, Christophe Blanquart, Valérie Héroguez
Fast clearance, metabolism, and systemic toxicity are major limits for the clinical use of anti-cancer drugs. Histone deacetylase inhibitors (HDACi) present these defects, despite displaying promising anti-tumor properties on tumor cells in vitro and in in vivo models of cancer. The specific delivery of anti-cancer drugs into the tumor should improve their clinical benefit by limiting systemic toxicity and by increasing the anti-tumor effect. This paper deals with the synthesis of the polymeric nanoparticle platform, which was produced by Ring-Opening Metathesis Polymerization (ROMP), able to release anti-cancer drugs in dispersion, such as histone deacetylase inhibitors, into mesothelioma tumors...
February 12, 2019: Biomolecules
https://read.qxmd.com/read/30759369/the-blood-brain-barrier-and-beyond-nano-based-neuropharmacology-and-the-role-of-extracellular-matrix
#16
Petra Henrich-Noack, Dragana Nikitovic, Monica Neagu, Anca Oana Docea, Ayse Basak Engin, Svetlana Gelperina, Michael Shtilman, Panayiotis Mitsias, George Tzanakakis, Illana Gozes, Aristidis Tsatsakis
Restrained drug delivery due to the blood-brain barrier (BBB) considerably limits options for the treatment of brain pathologies. The utilization of nanoparticulate (NP) carriers has been proposed as a solution. The development strategies need to address the important hurdle of NP passage across the BBB as well as the altered cellular up-take due to the pathophysiological changes of the damaged or diseased tissue as well as immunological and toxicological aspects of nanomedicine penetration. This review therefore scopes to: 1] outline the state-of-the art knowledge on BBB passage, 2] address the significant influence of pathological conditions on nanoparticulate drug delivery, and, 3] highlight the largely neglected role of the extracellular matrix (ECM)...
February 10, 2019: Nanomedicine: Nanotechnology, Biology, and Medicine
https://read.qxmd.com/read/30758140/extraction-of-antidepressant-drugs-in-biological-samples-using-alkanol-based-nano-structured-supramolecular-solvent-microextraction-followed-by-gas-chromatography-mass-spectrometric-analysis
#17
Qamar Salamat, Yadollah Yamini, Morteza Moradi, Abolfazl Farahani, Neda Feizi
In the present study, a supramolecular solvent was formed from reverse micelle aggregates of octanol. The proposed supramolecular solvent was used for rapid extraction of some antidepressants drugs including amitriptyline, imipramine, desipramine, maprotiline, sertraline, and doxepin from biological samples. Alkanol-based supramolecular solvent have a unique array of physicochemical properties, making them a very attractive alternative to replace organic solvents in analytical extractions. The parameters affecting the extraction of target analytes (i...
February 13, 2019: Journal of Separation Science
https://read.qxmd.com/read/30754653/formation-and-investigation-of-electrospun-eudragit-e100-oregano-mats
#18
Juste Baranauskaite, Erika Adomavičiūtė, Virginija Jankauskaitė, Mindaugas Marksa, Zita Barsteigienė, Jurga Bernatoniene
An electrospun mat of Eudragit E100 (EE100) (a cationic copolymer based on dimethylaminoethyl methacrylate, butyl methacrylate, and methyl methacrylate) was used as a delivery system for oregano ethanolic extract (OEE). Oregano is a biologically active material which is widely used because of the antibacterial and antifungal activity. The oregano herb consists of phenolic compounds, the main of which are rosmarinic acid and from essential oil-carvacrol. Such a material could be an ideal candidate for oral drug systems...
February 11, 2019: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://read.qxmd.com/read/30753931/tailoring-novel-soft-nano-vesicles-flexosomes-for-enhanced-transdermal-drug-delivery-optimization-characterization-and-comprehensive-ex-vivo-in-vivo-evaluation
#19
Hanaa A Abdel-Messih, Rania A H Ishak, Ahmed S Geneidi, Samar Mansour
The transdermal route is a convenient non-invasive way for drug delivery, however, the hydrophobic compact nature of stratum corneum (SC) forms an obstacle hindering the diffusion of drugs particularly hydrophilic ones. Hence, the purpose of this study was to develop novel soft nano-vesicles, entitled Flexosomes, amalgamating two penetration enhancers, ethanol and one edge activator (EA) from various types and different hydrophilic-lipophilic balances. The tailored vesicles were loaded with tropisetron hydrochloride (TRO), a potent highly-soluble anti-emetic, and compared with ethosomes...
February 9, 2019: International Journal of Pharmaceutics
https://read.qxmd.com/read/30744757/preparation-and-in-vitro-cellular-uptake-assessment-of-multifunctional-rubik-like-magnetic-nano-assemblies
#20
Xiawen Zheng, Yuejian Chen, Zhiming Wang, Lina Song, Yu Zhang, Ning Gu, Fei Xiong
Through self-assembly of nanoparticles into high-order and stable structures of cubic clusters, high drug-loading rubik-like magnetic nano-assemblies (MNAs), possessing folic acid targeting and strong magnetism-enhanced cellular uptake capabilities, were built. In this study, the core of the cubic drug assemblies consisted of four monodisperse superparamagnetic iron oxide nanoparticles coated with layers of oleic acid (Fe₃O₄@OA), simultaneously encapsulating fluorescein, and Paclitaxol (Flu-MNAs and PTX-MNAs) for imaging and therapeutic applications...
June 1, 2019: Journal of Nanoscience and Nanotechnology
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