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https://www.readbyqxmd.com/read/28324933/an-ultrasonically-powered-implantable-device-for-targeted-drug-delivery
#1
Jayant Charthad, Spyridon Baltsavias, Devleena Samanta, Ting Chia Chang, Marcus J Weber, Niloufar Hosseini-Nassab, Richard N Zare, Amin Arbabian
A wirelessly powered implantable device is proposed for fully programmable and localized drug delivery. The implant is powered using an external ultrasonic transmitter and operates at <; 5% of the FDA diagnostic ultrasound intensity limit. Drug release is achieved through electrical stimulation of drug-loaded polypyrrole nanoparticles. A design methodology for the implant electronics is presented and experimentally demonstrated to be accurate in predicting the concentration of the released drug. To the best of our knowledge, this is the first ultrasonically powered implantable device platform for targeted drug delivery using electroresponsive polymers...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324594/polymers-in-the-delivery-of-sirna-for-the-treatment-of-virus-infections
#2
REVIEW
Nicholas Reynolds, Megan Dearnley, Tracey M Hinton
Viral diseases remain a major cause of death worldwide. Despite advances in vaccine and antiviral drug technology, each year over three million people die from a range of viral infections. Predominant viruses include human immunodeficiency virus, hepatitis viruses, and gastrointestinal and respiratory viruses. Now more than ever, robust, easily mobilised and cost-effective antiviral strategies are needed to combat both known and emerging disease threats. RNA interference and small interfering (si)RNAs were initially hailed as a "magic bullet", due to their ability to inhibit the synthesis of any protein via the degradation of its complementary messenger RNA sequence...
April 2017: Topics in Current Chemistry (Journal)
https://www.readbyqxmd.com/read/28320042/calcium-channel-modulation-as-a-target-in-chronic-pain-control
#3
REVIEW
Ryan Patel, Carlota Montagut-Bordas, Anthony H Dickenson
Neuropathic pain remains poorly treated for large numbers of patients and little progress has been made in developing novel classes of analgesics. To redress this issue, ziconotide (Prialt(TM) ) was developed and approved as a first in class synthetic version of ω-conotoxin MVIIA, a Cav 2.2 peptide blocker. Unfortunately, the impracticalities of intrathecal delivery, low therapeutic index and severe neurological side effects associated with ziconotide has restricted its use to exceptional circumstances. Ziconotide exhibits no state or use dependent block of Cav 2...
March 20, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28319364/a-new-spin-on-antibody-drug-conjugates-trastuzumab-fulvestrant-colloidal-drug-aggregates-target-her2-positive-cells
#4
Ahil N Ganesh, Christopher Mclaughlin, Da Duan, Brian K Shoichet, Molly S Shoichet
While the formation of colloidal aggregates leads to artifacts in early drug discovery, their composition makes them attrac-tive as nanoparticle formulations for targeted drug delivery as the entire nanoparticle is composed of drug. The typical tran-sient stability of colloidal aggregates has inhibited exploiting this property. To overcome this limitation, we investigated a series of proteins to stabilize colloidal aggregates of the chemotherapeutic, fulvestrant, including: bovine serum albumin, a generic human immunoglobulin G, and trastuzumab, a therapeutic anti-human epidermal growth factor receptor 2 anti-body...
March 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28315693/central-glp-1-receptor-activation-modulates-cocaine-evoked-phasic-dopamine-signaling-in-the-nucleus-accumbens-core
#5
Samantha M Fortin, Mitchell F Roitman
Drugs of abuse increase the frequency and magnitude of brief (1-3s), high concentration (phasic) dopamine release events in terminal regions. These are thought to be a critical part of drug reinforcement and ultimately the development of addiction. Recently, metabolic regulatory peptides, including the satiety signal glucagon-like peptide-1 (GLP-1), have been shown to modulate cocaine reward-driven behavior and sustained dopamine levels after cocaine administration. Here, we use fast-scan cyclic voltammetry (FSCV) to explore GLP-1 receptor (GLP-1R) modulation of dynamic dopamine release in the nucleus accumbens (NAc) during cocaine administration...
March 15, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28315495/legumain-cleavable-4-arm-poly-ethylene-glycol-doxorubicin-conjugate-for-tumor-specific-delivery-and-release
#6
Huicong Zhou, Huanjiao Sun, Shixian Lv, Dawei Zhang, Xuefei Zhang, Zhaohui Tang, Xuesi Chen
Traditional chemotherapy strategy exists undesirable toxic side-effects to normal tissues due to the low selectively to cancer cells of micromolecule cytotoxic drugs. One considered method to realizing the targeted delivery and increasing the specificity to tumor tissues of the cytotoxic drug is to transporting and discharging it through an environment-sensitive mechanism. In this study, a novel enzyme-sensitive polymer-doxorubicin conjugate was designed to delivery chemotherapeutic drug in a tumor-specific behavior and selectively activated in tumor tissue...
March 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28315446/targeted-delivery-of-morin-a-dietary-bioflavanol-encapsulated-mannosylated-liposomes-to-the-macrophages-of-adjuvant-induced-arthritis-rats-inhibits-inflammatory-immune-response-and-osteoclastogenesis
#7
Farhath Sultana, Manoj Kumar Neog, MahaboobKhan Rasool
The purpose of the study was to develop a liposomal drug delivery system for morin, a dietary polyphenol, in order to target the synovial macrophages and investigate the remission of disease severity in the adjuvant-induced arthritic (AIA) rats. To do so, mannose decorated liposomal morin (ML-Morin) was prepared using the thin film hydration method and the physicochemical properties were characterized. The particle size and zeta potential of liposomal morin (L-Morin) was found to be 127.9nm ± 2.6 and -24.5mV ± 0...
March 14, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28315359/antibodies-and-associates-partners-in-targeted-drug-delivery
#8
REVIEW
Patrick J Kennedy, Carla Oliveira, Pedro L Granja, Bruno Sarmento
Monoclonal antibodies (mAbs) are well established in the clinic due to their specificity and affinity to a diverse array of biochemical targets. More recently, mAbs are being exploited as targeting agents in modern drug delivery systems, aiming to bypass normal host tissue and to accumulate a therapeutic agent to a specific tissue or cell for enhanced pharmacology. At sizes ranging from ~10-100nm, antibody-based bioconjugates have opened up a whole new realm of clinical possibilities with several platforms emerging on the market...
March 14, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28314368/metallic-nanoparticles-reduce-the-migration-of-human-fibroblasts-in-vitro
#9
Larissa Fernanda de Araújo Vieira, Marvin Paulo Lins, Iana Mayane Mendes Nicácio Viana, Jeniffer Estevão Dos Santos, Salete Smaniotto, Maria Danielma Dos Santos Reis
Nanoparticles have extremely wide applications in the medical and biological fields. They are being used in biosensors, local drug delivery, diagnostics, and medical therapy. However, the potential effects of nanoparticles on target cell and tissue function, apart from cytotoxicity, are not completely understood. Thus, the aim of this study was to investigate the in vitro effects of silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) on human fibroblasts with respect to their interaction with the extracellular matrix and in cell migration...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28314136/platelet-microparticle-inspired-clot-responsive-nanomedicine-for-targeted-fibrinolysis
#10
Christa L Pawlowski, Wei Li, Michael Sun, Kavya Ravichandran, DaShawn Hickman, Clarissa Kos, Gurbani Kaur, Anirban Sen Gupta
Intravascular administration of plasminogen activators is a clinically important thrombolytic strategy to treat occlusive vascular conditions. A major issue with this strategy is the systemic off-target drug action, which affects hemostatic capabilities and causes substantial hemorrhagic risks. This issue can be potentially resolved by designing technologies that allow thrombus-targeted delivery and site-specific action of thrombolytic drugs. To this end, leveraging a liposomal platform, we have developed platelet microparticle (PMP)-inspired nanovesicles (PMINs), that can protect encapsulated thrombolytic drugs in circulation to prevent off-target uptake and action, anchor actively onto thrombus via PMP-relevant molecular mechanisms and allow drug release via thrombus-relevant enzymatic trigger...
March 14, 2017: Biomaterials
https://www.readbyqxmd.com/read/28304180/nanomedicine-for-the-treatment-of-acute-respiratory-distress-syndrome-the-2016-ats-bear-cage-award-winning-proposal
#11
Jacob S Brenner
After dozens of clinical trials, there are still no FDA-approved drugs which improve mortality in acute respiratory distress syndrome (ARDS). These poor results may in part be caused by three unique pharmacological challenges presented by ARDS: 1) ARDS patients are fragile due to concomitant multiple organ dysfunction, so do not tolerate off-target side effects of drugs; 2) inhaled drug delivery is impeded by the column of proteinaceous fluid covering the injured alveoli; 3) ARDS is heterogeneous in its underlying pathophysiology, so targeting one pathway is unlikely to improve most patients...
March 17, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28304023/peptide-functionalized-gold-nanoparticles-versatile-biomaterials-for-diagnostic-and-therapeutic-applications
#12
REVIEW
Jingyi Zong, Steven L Cobb, Neil R Cameron
Colloidal gold solutions have been used for centuries in a wide variety of applications including staining glass and in the colouring of ceramics. More recently, gold nanoparticles (GNPs) have been studied extensively due to their interesting size-dependent electronic and optical properties. GNPs can be functionalized easily with biomolecules that contain thiols, amines, or even phosphine moieties. For example, the reaction of thiol-containing peptides with GNPs has been used extensively to prepare novel hybrid materials for biomedical applications...
March 17, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28303966/targeted-delivery-of-doxorubicin-by-nano-loaded-mesenchymal-stem-cells-for-lung-melanoma-metastases-therapy
#13
Yuekui Zhao, Shanshan Tang, Jiamin Guo, Murad Alahdal, Shunxiu Cao, Zhaocong Yang, Fangfang Zhang, Yumeng Shen, Minjie Sun, Ran Mo, Li Zong, Liang Jin
Poor antigenic presentation of tumor tissues and a lack of specific targets currently limit the success of nanoparticle delivery system. Cellular carrier technique has been recently explored extensively as a substitutive or supplement for traditional targeting delivery system. Here, we demonstrate the usage of mesenchymal stem cells (MSCs) loaded with doxorubicin containing polymer nanoparticles in pulmonary melanoma metastases therapy, as a modified technique of targeted delivery system. The characterizations of prepared nanoparticles and MSCs sensitivity to DOX and PLGA-DOX were measured...
March 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28303522/nanotechnology-for-the-treatment-of-melanoma-skin-cancer
#14
REVIEW
Lucas B Naves, Chetna Dhand, Jayarama Reddy Venugopal, Lakshminarayanan Rajamani, Seeram Ramakrishna, Luis Almeida
Melanoma is the most aggressive type of skin cancer and has very high rates of mortality. An early stage melanoma can be surgically removed, with a survival rate of 99%. This literature review intends to elucidate the possibilities to treat melanoma skin cancer using hybrid nanofibers developed by advanced electrospinning process. In this review we have shown that the enhanced permeability and retention is the basis for using nanotechnology, aiming topical drug delivery. The importance of the detection of skin cancer in the early stages is directly related to non-metastatic effects and survival rates of melanoma cells...
March 16, 2017: Progress in biomaterials
https://www.readbyqxmd.com/read/28302581/targeting-ets1-with-rnai-based-supramolecular-nanoassemblies-for-multidrug-resistant-breast-cancer-therapy
#15
Min Wu, Xingang Liu, Weihong Jin, Yongbing Li, Yang Li, Qinglian Hu, Paul K Chu, Guping Tang, Yuan Ping
Overexpression of erythroblastosis virus E26 oncogene homolog 1 (ETS1) gene is correlated with both tumor progression and poor response to chemotherapy in cancer treatment, and the exploitation of RNA interference (RNAi) technology to downregulate ETS1 seems to be a promising approach to reverse multidrug-resistant cancer cells to chemotherapy. Hence, the RNAi-based nanomedicine which is able to simultaneously downregulate ETS1 expression and to deliver chemotherapeutic agents may improve multidrug-resistant cancer therapy synergistically...
March 13, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28302515/orodispersible-films-towards-drug-delivery-in-special-populations
#16
REVIEW
Mariagiovanna Scarpa, Sven Stegemann, Wen-Kai Hsiao, Heinz Pichler, Simon Gaisford, Massimo Bresciani, Amrit Paudel, Mine Orlu
Orodispersible films (ODF) hold promise as a novel delivery method, with the potential to deliver tailored therapies to different patient populations. Together with the current trends and potential therapeutic areas such technology can address, some of the unmet needs in terms of quality aspects and manufacturing of conventional and novel (printed) ODF are discussed. Overall, this article aims to stimulate further research to fill the current knowledge gap between manufacturing and administration requirements of ODF targeting specific patient subpopulations such as geriatrics...
March 13, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28302038/current-application-of-quantum-dots-qd-in-cancer-therapy-a-review
#17
Lavanya Thilak Babu, Priyankar Paira
Semiconductor quantum dots proved themselves as an efficient fluorescent probes in cancer detection and treatment. Their size, high stability, non-photobleaching and water solubility made them a unique fluorophore in place of conventional organic dyes. Newly emerged theranoistic drug delivery system using quantum dots helped us in better understanding of the drug delivery mechanism inside the cells. Surface modified Quantum dots and their applications became wide in bioimaging, immunohistochemistry, tracking intracellular drug and intracellular molecules target...
March 15, 2017: Mini Reviews in Medicinal Chemistry
https://www.readbyqxmd.com/read/28302022/glial-cell-a-potential-target-for-cellular-and-drug-based-therapy-in-various-cns-diseases
#18
Shakeeb Ahmed, Yasmin Sultana, Azka Gull, Tahir Khuroo, Mohd Aqil
Glial cells are integrated part of neurovascular unit of blood brain barrier (BBB). They undergo mitosis and mainly classified as astrocytes, oligodendrocytes, microglia, ependymal cells and nerve glial antigen 2 cells. Being a most versatile glial cell, astrocytes provide structural support to neurons, maintain brain homeostasis, take part in neuronal communication, and perform some housekeeping functions. Oligodendrocytes myelinate the neuronal axons for proper transmission of nerve impulse and microglia are brain immune cells...
March 16, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28302015/multicolorful-carbon-dots-for-tumor-theranostics
#19
Haitao Wang, Jingran Bi, Beiwei Zhu, Mingqian Tan
Cancer is a great threat of human health worldwide due to the uncontrollable spread of malignant cells throughout the body. Accurate diagnosis and targeted therapy approaches are critical factors for cancer treatment. Carbon dots are a novel class of small fluorescence carbon nanostructures with size less than 10 nm at least in one dimension, which exhibit excellent optical properties, larger surface area to volume ratio and low toxicity. The unique properties of carbon dots make it as an ideal carrier for incorporation of cancer targeting moieties, bio-imaging agents and antineoplastic agents in one delivery system...
March 16, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28301933/ferritin-decorated-plga-paclitaxel-loaded-nanoparticles-endowed-with-an-enhanced-toxicity-towards-mcf-7-breast-tumour-cells
#20
Ludmila N Turino, Maria Ruggiero, Rachele Stefania, Juan Carlos Cutrin, Silvio Aime, Simonetta Geninatti Crich
PolyLactic and Glycolic Acid nanoparticles (PLGA-NPs), coated with L-Ferritin, are exploited for the simultaneous delivery of paclitaxel and an amphiphilic Gd based MRI contrast agent into breast cancer cells (MCF7). L-Ferritin has been covalently conjugated to the external surface of PLGA-NPs exploiting NHS activated carboxylic groups. The results confirmed that nanoparticles decorated with L-Ferritin have many advantages with respect both albumin-decorated and non-decorated particles. Ferritin moieties endow PLGA-NPs with targeting capability, exploiting SCARA5 receptors overexpressed by these tumour cells, that results in an increased paclitaxel cytotoxicity...
March 16, 2017: Bioconjugate Chemistry
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