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https://www.readbyqxmd.com/read/28437753/p-gp-modulatory-acetyl-11-keto-%C3%AE-boswellic-acid-based-nanoemulsified-carrier-system-for-augmented-oral-chemotherapy-of-docetaxel
#1
Gitu Pandey, Naresh Mittapelly, Guru Raghavendra Valicherla, Ravi Prakash Shukla, Shweta Sharma, Venkatesh Teja Banala, Sandeep Urandur, Arun Kumar Jajoriya, Kalyan Mitra, D P Mishra, J R Gayen, P R Mishra
In spite of being a very potent and promising drug against many types of cancer, docetaxel suffers the disadvantage of low solubility and poor bioavailability rendering it unsuitable for oral administration. Also, the available marketed formulation for intravenous administration has its inherent drawbacks owing to the presence of polysorbate 80. Here, we exploited the anticancer and P-gp inhibitory potential of naturally occurring frankincense oil to fabricate a stable docetaxel loaded nanoemulsified carrier system for oral delivery...
April 15, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28437626/recent-advances-in-co2-bubble-generating-carrier-systems-for-localized-controlled-release
#2
REVIEW
Yu-Jung Lin, Chieh-Cheng Huang, Wei-Lin Wan, Ching-Hua Chiang, Yen Chang, Hsing-Wen Sung
This article reviews recent progress in the development of carbon dioxide (CO2) bubble-generating drug carriers, including their designs and operating mechanisms; these carriers constitute an advanced class of stimuli-responsive delivery systems with considerable potential. The drug carriers contain stimuli-responsive agents, which are stable before they reach the target location, but enable rapid drug release that is triggered by the generation of CO2 bubbles, which are chemically inert, under certain stimuli...
April 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28437610/long-acting-release-formulation-of-exendin-4-based-on-biomimetic-mineralization-for-type-2-diabetes-therapy
#3
Wei Chen, Guohao Wang, Bryant C Yung, Gang Liu, Zhiyong Qian, Xiaoyuan Chen
Exendin-4 has been clinically exploited for treating type 2 diabetes, but the short circulation half-life and multiple daily injections limit its widespread application with respect to poor patient compliance, low efficacy, and high treatment cost. In this study, a potent long-acting release system based on biomimetic mineralization was constructed for biocompatible and sustained exendin-4 delivery. Similar to natural biomineralization, exendin-4 can be mineralized to form nano-sized mineral solids by means of the reaction between acidic amino acid residues and calcium ions in a supersaturated environment with negligible influence on peptide bioactivity...
April 24, 2017: ACS Nano
https://www.readbyqxmd.com/read/28437080/comparison-of-tumor-penetration-of-podophyllotoxin-carboxymethylcellulose-conjugates-with-various-chemical-compositions-in-tumor-spheroid-culture-and-in-vivo-solid-tumor
#4
Yang Yang, Aniruddha Roy, Yucheng Zhao, Elijus Undzys, Shyh-Dar Li
Polymer conjugation is an attractive approach for delivering insoluble and highly toxic drugs to tumors. However, most reports in the literature only disclose the optimal composition without emphasizing rational design or composition optimization to achieve maximized biological effects. In this study, we aimed to demonstrate that composition of a polymer conjugate would determine its physiochemical characteristics, tumor penetration and, ultimately, the in vivo efficacy. We also aimed to examine whether the tumor spheroid model could generate comparable results with the in vivo tumor model in terms of tumor penetration and efficacy of the various polymer conjugates...
April 24, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28436718/design-of-a-novel-curcumin-soybean-phosphatidylcholine-complex-based-targeted-drug-delivery-systems
#5
Jiajiang Xie, Yanxiu Li, Liang Song, Zhou Pan, Shefang Ye, Zhenqing Hou
Recently, the global trend in the field of nanomedicine has been toward the design of combination of nature active constituents and phospholipid (PC) to form a therapeutic drug-phospholipid complex. As a particular amphiphilic molecular complex, it can be a unique bridge of traditional dosage-form and novel drug delivery system. In thisarticle, on the basis of drug-phospholipid complex technique and self-assembly technique, we chose a pharmacologically safe and low toxic drug curcumin (CUR) to increase drug-loading ability, achieve controlled/sustained drug release and improve anticancer activity...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28436713/modified-dextran-heparin-based-triggered-release-microspheres-for-cardiovascular-delivery-of-therapeutic-drugs-using-protamine-as-a-stimulus
#6
Hoai X Nguyen, Edgar A O'Rear
In this study, we describe the synthesis of an amine-modified acetalated dextran polymer which is combined with heparin (HP) as the basis for a novel controlled release system. Dextran-amine (DEXAM) conjugates, synthesized using reductive amination, were incorporated into DEXAM/HP microspheres. HP binds to positively charged ammonium ions of the DEXAM conjugates, contributing to the structural integrity of the microspheres. Crystal violet (CV) was encapsulated inside DEXAM/HP microspheres as a model drug to test the system...
April 24, 2017: Journal of Microencapsulation
https://www.readbyqxmd.com/read/28436702/a-novel-matrix-dispersion-based-on-phospholipid-complex-for-improving-oral-bioavailability-of-baicalein-preparation-in-vitro-and-in-vivo-evaluations
#7
Yang Zhou, Wujun Dong, Jun Ye, Huazhen Hao, Junzhuo Zhou, Renyun Wang, Yuling Liu
Phospholipid complex is one of the most successful approaches for enhancing oral bioavailability of poorly absorbed plant constituents. But the sticky property of phospholipids results in an unsatisfactory dissolution of drugs. In this study, a matrix dispersion of baicalein based on phospholipid complex (BaPC-MD) was first prepared by a discontinuous solvent evaporation method, in which polyvinylpyrrolidone-K30 (PVP-K30) was employed for improving the dispersibility of baicalein phospholipid complex (BaPC) and increasing dissolution of baicalein...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28436438/spatiotemporally-and-sequentially-controlled-drug-release-from-polymer-gatekeeper-hollow-silica-nanoparticles
#8
L Palanikumar, M T Jeena, Kibeom Kim, Jun Yong Oh, Chaekyu Kim, Myoung-Hwan Park, Ja-Hyoung Ryu
Combination chemotherapy has become the primary strategy against cancer multidrug resistance; however, accomplishing optimal pharmacokinetic delivery of multiple drugs is still challenging. Herein, we report a sequential combination drug delivery strategy exploiting a pH-triggerable and redox switch to release cargos from hollow silica nanoparticles in a spatiotemporal manner. This versatile system further enables a large loading efficiency for both hydrophobic and hydrophilic drugs inside the nanoparticles, followed by self-crosslinking with disulfide and diisopropylamine-functionalized polymers...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28436310/synthesis-and-characterization-of-poly-n-vinylcaprolactam-based-spray-dried-microparticles-exhibiting-temperature-and-ph-sensitive-properties-for-controlled-release-of-ketoprofen
#9
Simone F Medeiros, Milene V Lopes, Bartira Rossi-Bergmann, Maria Inês Ré, Amilton M Santos
Poly(N-vinylcaprolactam) (PNVCL) and poly(N-vinylcaprolactam-co-acrylic acid) (poly(NVCL-co-AA)) were synthesized by solution free radical polymerization and displayed thermo-responsive behavior, with lower critical solution temperatures (LCSTs) of 35°C and 39°C, respectively. The incorporation of AA unities made the poly(NVCL-co-AA) sensitive to both pH- and temperature. They were exploited in this work in preparing microparticles loaded with ketoprofen via spray-drying to modulate the drug release rate by changing pH or temperature...
April 22, 2017: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/28435554/influence-of-soluble-fillers-in-improving-porosity-of-handmade-antibiotic-impregnated-polymethyl-methacrylate-pmma-beads-an-in-vitro-study
#10
H N Rasyid, S Soegijoko
There have been many investigations on non-biodegradable materials acting as an antibiotic carrier for local drug delivery systems based on polymethyl methacrylate (PMMA) beads. However, the material is non-degradable and non-porous so that less than 5% of the encapsulated drug is released. In order to obtain better release of the antibiotics, greater porosity of the beads would be required. Adding fillers could increase the bead's porosity, thus improving the antibiotic release from the beads. The purpose of the study is to optimize release kinetics of gentamicin from handmade beads by adding fillers such as glycine and sodium chloride in different concentrations...
July 2016: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/28435471/nucleolin-targeted-extracellular-vesicles-as-a-versatile-platform-for-biologics-delivery-to-breast-cancer
#11
Yayu Wang, Xiaojia Chen, Baoqing Tian, Jiafan Liu, Li Yang, Lilan Zeng, Tianfen Chen, An Hong, Xiaogang Wang
Small interfering RNAs (siRNA)/microRNAs (miRNA) have promising therapeutic potential, yet their clinical application has been hampered by the lack of appropriate delivery systems. Herein, we employed extracellular vesicles (EVs) as a targeted delivery system for small RNAs. EVs are cell-derived small vesicles that participate in cell-to-cell communication for protein and RNA delivery. We used the aptamer AS1411-modified EVs for targeted delivery of siRNA/microRNA to breast cancer tissues. Tumor targeting was facilitated via AS1411 binding to nucleolin, which is highly expressed on the surface membrane of breast cancer cells...
2017: Theranostics
https://www.readbyqxmd.com/read/28435469/interleukin-3-receptor-targeted-exosomes-inhibit-in-vitro-and-in-vivo-chronic-myelogenous-leukemia-cell-growth
#12
Daniele Bellavia, Stefania Raimondo, Giovanna Calabrese, Stefano Forte, Marta Cristaldi, Agostina Patinella, Lorenzo Memeo, Mauro Manno, Samuele Raccosta, Patrizia Diana, Girolamo Cirrincione, Gianluca Giavaresi, Francesca Monteleone, Simona Fontana, Giacomo De Leo, Riccardo Alessandro
Despite Imatinib (IM), a selective inhibitor of Bcr-Abl, having led to improved prognosis in Chronic Myeloid Leukemia (CML) patients, acquired resistance and long-term adverse effects is still being encountered. There is, therefore, urgent need to develop alternative strategies to overcome drug resistance. According to the molecules expressed on their surface, exosomes can target specific cells. Exosomes can also be loaded with a variety of molecules, thereby acting as a vehicle for the delivery of therapeutic agents...
2017: Theranostics
https://www.readbyqxmd.com/read/28435458/phosphorylcholine-based-stealthy-nanocapsules-enabling-tumor-microenvironment-responsive-doxorubicin-release-for-tumor-suppression
#13
Gan Liu, Hsiang-I Tsai, Xiaowei Zeng, Yixiong Zuo, Wei Tao, Jun Han, Lin Mei
The efficient delivery of anticancer drugs into tumor tissues to improve therapeutic efficacy remains an urgent demand. To satisfy this demand, a drug delivery system based on a stealthy nanocapsule was developed. This nanocapsule was fabricated by encapsulating stealthy cross-linked poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC) and benzaldehyde groups around the protein bovine serum albumin (BSA) followed by conjugation of doxorubicin (Dox) through a pH-responsive benzoic-imine bond. The in vitro results show that the Dox-conjugated nanocapsule (nBSA-Dox) released the drug under an acidic tumor microenvironment (pH ~6...
2017: Theranostics
https://www.readbyqxmd.com/read/28435439/nanobiotechnology-cell-membrane-based-delivery-systems
#14
Pengfei Zhang, Gang Liu, Xiaoyuan Chen
The increasingly rapid pace of research in the field of bioinspired drug delivery systems is revealing the promise of cell membrane-based nanovesicles for biomedical applications. Those cell membrane-based nanoparticles combine the natural functionalities of cell plasma membranes and the bioengineering flexibility of synthetic nanomaterials, and such versatility provides a means of designing exciting new drug formulations for personalized treatment in future nanomedicine.
April 2017: Nano Today
https://www.readbyqxmd.com/read/28435263/neuroprotection-against-apoptosis-of-sk-n-mc-cells-using-rmp-7-and-lactoferrin-grafted-liposomes-carrying-quercetin
#15
Yung-Chih Kuo, Chien-Wei Tsao
A drug delivery system of quercetin (QU)-encapsulated liposomes (LS) grafted with RMP-7, a bradykinin analog, and lactoferrin (Lf) was developed to permeate the blood-brain barrier (BBB) and rescue degenerated neurons, acting as an Alzheimer's disease (AD) pharmacotherapy. This colloidal formulation of QU-encapsulated LS grafted with RMP-7 and Lf (RMP-7-Lf-QU-LS) was used to traverse human brain microvascular endothelial cells (HBMECs) regulated by human astrocytes (HAs) and to treat SK-N-MC cells after an insult with cytotoxic β-amyloid (Aβ) fibrils...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28435261/ph-sensitive-au-bsa-dox-fa-nanocomposites-for-combined-ct-imaging-and-targeted-drug-delivery
#16
He Huang, Da-Peng Yang, Minghuan Liu, Xiangsheng Wang, Zhiyong Zhang, Guangdong Zhou, Wei Liu, Yilin Cao, Wen Jie Zhang, Xiansong Wang
Albumin-based nanoparticles (NPs) as a drug delivery system have attracted much attention owing to their nontoxicity, non-immunogenicity, great stability and ability to bind to many therapeutic drugs. Herein, bovine serum albumin (BSA) was utilized as a template to prepare Au-BSA core/shell NPs. The outer layer BSA was subsequently conjugated with cis-aconityl doxorubicin (DOX) and folic acid (FA) to create Au-BSA-DOX-FA nanocomposites. A list of characterizations was undertaken to identify the successful conjugation of drug molecules and targeted agents...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28435256/doxorubicin-loaded-cell-derived-nanovesicles-an-alternative-targeted-approach-for-anti-tumor-therapy
#17
Wei Jiang Goh, Choon Keong Lee, Shui Zou, Esther Cy Woon, Bertrand Czarny, Giorgia Pastorin
Cell-derived nanovesicles (CDNs) are an emerging class of biological drug delivery systems (DDS) that retain the characteristics of the cells they were derived from, without the need for further surface functionalization. CDNs are also biocompatible, being derived from natural sources and also take advantage of the enhanced permeability and retention effect due to their nanodimensions. Furthermore, CDNs derived from monocytes were shown to have an in vivo targeting effect, accumulating at the tumor site in a previous study conducted in a mouse tumor model...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28435252/polyphenol-nanoformulations-for-cancer-therapy-experimental-evidence-and-clinical-perspective
#18
REVIEW
Yasamin Davatgaran-Taghipour, Salar Masoomzadeh, Mohammad Hosein Farzaei, Roodabeh Bahramsoltani, Zahra Karimi-Soureh, Roja Rahimi, Mohammad Abdollahi
Cancer is defined as the abnormal cell growth that can cause life-threatening malignancies with high financial costs for patients as well as the health care system. Natural polyphenols have long been used for the prevention and treatment of several disorders due to their antioxidant, anti-inflammatory, cytotoxic, antineoplastic, and immunomodulatory effects discussed in the literature; thus, these phytochemicals are potentially able to act as chemopreventive and chemotherapeutic agents in different types of cancer...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28435220/formulation-release-characteristics-and-bioavailability-study-of-gastroretentive-floating-matrix-tablet-and-floating-raft-system-of-mebeverine-hcl
#19
Mohamed A El Nabarawi, Mahmoud H Teaima, Rehab A Abd El-Monem, Nagla A El Nabarawy, Dalia A Gaber
To prolong the residence time of dosage forms within the gastrointestinal tract until all drug is released at the desired rate is one of the real challenges for oral controlled-release drug delivery systems. This study was designed to develop a controlled-release floating matrix tablet and floating raft system of Mebeverine HCl (MbH) and evaluate different excipients for their floating behavior and in vitro controlled-release profiles. Oral pharmacokinetics of the optimum matrix tablet, raft system formula, and marketed Duspatalin(®) 200 mg retard as reference were studied in beagle dogs...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28435135/noninvasive-delivery-of-oligonucleotide-by-penetratin-modified-polyplexes-to-inhibit-protein-expression-of-intraocular-tumor
#20
Lingyu Tai, Chang Liu, Kuan Jiang, Xishan Chen, Gang Wei, Weiyue Lu, Weisan Pan
Our present study aimed to develop an antisense oligonucleotide (ASO) delivery system to achieve gene silencing in intraocular tumor via topical instillation. ASO specific for luciferase was chosen as model drug, polyamidoamine (PG5) was employed to condense ASO, and penetratin (Pene) was used to enhance cellular uptake. Nanoscale PG5/ASO/Pene polyplex was stabilized via noncovalent bonding. In vitro evaluations indicated that PG5/ASO/Pene exhibited improved cell-penetrating and gene silencing ability compared with naked ASO and PG5/ASO...
April 20, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
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