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Journal of Drug Targeting

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https://www.readbyqxmd.com/read/28988499/polymer-therapeutics-and-the-epr-effect
#1
Hiroshi Maeda
History of the EPR (enhanced permeability and retention) effect is discussed, which goes back to the analyses of molecular pathology in bacterial infection and edema (extravasation) formation. The first mediator we found for extravasation was bradykinin. Later on, were found nitric oxide and superoxide, then formation of peroxynitrite, that activates procollagenase. In this inflammatory setting many other vascular mediators are involved that are also common to cancer vasculature. Obviously cancer vasculature is defective architechtally, and this makes macromolecular drugs more permeable through the vascular wall...
October 9, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28972806/construction-of-nanostructured-dna-harbouring-phosphorodiamidate-morpholino-oligonucleotide-for-controlled-tissue-distribution-in-mice
#2
Yosuke Takahashi, Yuki Araie, Daiki Nomura, Yuki Takahashi, Kohei Sano, Hideo Saji, Yoshinobu Takakura, Makiya Nishikawa
Phosphorodiamidate morpholino oligonucleotides (PMOs) are a class of antisense oligonucleotides used in the treatment of neuromuscular diseases. Their major drawbacks are high blood clearance and poor cellular delivery. Previously, we demonstrated that tripod-like nanostructured DNA, or tripodna, was efficiently taken up by macrophages and dendritic cells. In this study, we used iodine-125((125)I)-labelled PMOs, designed a tripodna harbouring an (125)I-PMO ((125)I-PMO/tripodna), and evaluated whether this tripodna could control the pharmacokinetic properties of PMO...
October 3, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28972797/the-promising-potentials-of-capped-gold-nanoparticles-for-drug-delivery-systems
#3
Kamyar Khoshnevisan, Maryam Daneshpour, Mohammad Barkhi, Morteza Gholami, Hadi Samadian, Hassan Maleki
Fabrication and characterization of gold nanoparticles (GNPs) through reducing agents and different capped agents are one of their most attractive applications in biomedicine. GNPs are coated using various agents such as carbohydrate, amino acids, peptides, and proteins. These capped gold nanoparticles (C-GNPs) are applied for wide different applications including drug delivery in the recent decade and potential treatment and diagnosis in drug delivery systems (DDS). Recent studies have shown that these novel compounds and conjugated-nanoparticles drugs play a key role for the promising cure of high-risk refractory diseases...
October 3, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28972792/a-nano-liposome-vaccine-carrying-e75-a-her-2-neu-derived-peptide-exhibits-significant-anti-tumor-activity-in-mice
#4
Atefeh Arab, Javad Behravan, Atefeh Razazan, Zahra Gholizadeh, Amin Reza Nikpoor, Nastaran Barati, Fatemeh Mosaffa, Ali Badiee, Mahmoud Reza Jaafari
E75 (HER-2/neu-369-377), is an immunogenic peptide which is highly expressed in breast cancer patients. The purpose of this study was to develop an effective vaccine delivery/adjuvant system by attachment of this peptide to the surface of liposomes consisting of phospholipids including DSPC and DSPG with high transition temperature (Tm) and DOPE (a pH-sensitive lipid for cytosolic antigen delivery) to improve anti-tumor immune activity against the E75 peptide. For this purpose, the E75 peptide was incorporated into liposomes consisting of DSPC/DSPG/Chol/DOPE (15/2/3/5 molar ratio) through conjugation with maleimide-PEG2000-DSPE...
October 3, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28920483/hydroxycamptothecin-liposomes-based-on-thermal-and-magnetic-dual-responsive-system-preparation-in-vitro-and-in-vivo-antitumor-activity-microdialysis-based-tumor-pharmacokinetics
#5
Hai-Mei Zhu, Jin-Hui Gu, Yi Xie, Bo Xie, Jia-Jun Ling
Due to the absence of lactone form of hydroxycamptothecin, the commercially available hydroxycamptothecin injection exhibits inefficient therapeutic effects. In this study, we constructed a novel delivery system (thermosensitive magnetic liposomes) that protects lactone form of hydroxycamptothecin from blood or water. After hydroxycamptothecin was loaded into the thermosensitive magnetic liposome(HCPT/TML),its in vitro and in vivo antitumor activity and microdialysis-based tumor pharmacokinetics were determined...
September 18, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28911239/controlled-release-of-liposome-encapsulated-temozolomide-for-brain-tumor-treatment-by-convection-enhanced-delivery
#6
Chung-Yin Lin, Rui-Jin Li, Chiung-Yin Huang, Kuo-Chen Wei, Pin-Yuan Chen
Convection-enhanced delivery (CED) is a promising technique for the delivery of drugs directly into the central nervous system (CNS) and, more specifically, the brain. CED can increase drug concentration within a brain tumor, thereby improving the therapeutic efficacy and limiting the systemic toxicity of tumoricidal agents. In this study, we evaluated a drug-liposome construct in vitro and in vivo using U87 tumor-bearing nude mice. Dipalmitoylphosphatidylcholine (DPPC)-based liposomes were designed to deliver a lipophilic temozolomide (TMZ) formulation (LipoTMZ)...
September 15, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28906159/advances-in-nano-delivery-systems-for-doxorubicin-an-updated-insight
#7
Ummarah Kanwal, Nadeem Irfan Bukhari, Muhammad Ovais, Nasir Abass, Khalid Hussain, Abida Raza
Doxorubicin (DOX) is the most effective chemotherapeutic drug developed against broad range of cancers such as solid tumors, transplantable leukemias and lymphomas. Conventional DOX induced cardiotoxicity has limited its use. FDA approved drugs i.e. non-pegylated liposomal (Myocet®) and pegylated liposomal (Doxil®) formulations have no doubt shown comparatively reduced cardiotoxicity, but has raised new toxicity issues. The entrapment of doxorubicin in biocompatible, biodegradable and safe nano delivery systems can prevent its degradation in circulation minimizing its toxicity with increased half life, enhanced pharmacokinetic profile leading to improved patient compliance...
September 14, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28903605/in-honour-of-professor-ruth-duncan-recipient-of-the-journal-of-drug-targeting-s-lifetime-achievement-award-for-2017
#8
Saghir Akhtar
No abstract text is available yet for this article.
September 14, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28901798/multifunctional-micelle-delivery-system-for-overcoming-multidrug-resistance-of-doxorubicin
#9
Li Qin, Lei Wu, Shanshan Jiang, Dandan Yang, Huiyang He, Fang Zhang, Peng Zhang
Doxorubicin, as an anthracycline, plays an important role in chemotherapy. But multidrug resistance tremendously retards the anticancer effect of doxorubicin and results in the failure of chemotherapy. Multifunctional micelles emerge as a valid strategy to load doxorubicin by physical encapsulation or chemical binding to be delivered to cancer cells against multidrug resistance. In this review, mechanism of multidrug resistance of doxorubicin is simply described. Multifunctional co-delivery micelles of doxorubicin and main multidrug resistance modulators have been summarized in detail...
September 13, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28895754/coenzyme-q10-and-retinaldehyde-co-loaded-nanostructured-lipid-carriers-for-efficacy-evaluation-in-wrinkles
#10
Kritika Nayak, Sameer S Katiyar, Varun Kushwah, Sanyog Jain
The present study depicts coenzyme Q10 (CoQ10) and retinaldehyde (RAL) co-loaded Nanostructured Lipid Carriers (NLCs); having activity on different targets of photoageing, which can overcome deficits of conventional topical dosage forms. The developed NLCs were characterized for particle size, polydispersity index, and % Entrapment efficiency, followed by their incorporation into Carbopol® 934P-NF gel. In vitro cellular uptake and cytotoxicity assay was performed to evaluate NLCs and in vivo study on UV induced wrinkle model to determine efficacy of NLCs...
September 12, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28891340/do-model-polymer-therapeutics-sufficiently-diffuse-through-articular-cartilage-to-be-a-viable-therapeutic-route
#11
Alison Powell, Bruce Caterson, Clare Hughes, Alison Paul, Craig James, Stephen Hopkins, Omar Mansour, Peter Griffiths
The ability of a polymer therapeutic to access the appropriate subcellular location is crucial to its efficacy, and is defined to a large part by the many and complex cellular biological and biochemical barriers such a construct must traverse. It is shown here that model dextrin conjugates are able to pass through a cartilaginous extracellular matrix into chondrocytes, with little perturbation of the matrix structure, indicating that targeting of potential therapeutics through a cartilaginous extracellular matrix should prove possible...
September 11, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28875739/promising-effects-of-nanomedicine-in-cancer-drug-delivery
#12
Rajesh R Wakaskar
Successful ushering in of nanomedicine has shown immense potential in advancing cancer treatment regimens. The unique characteristics of nanoparticles such as their optimal size, shape, efficient surface to volume ratio, surfaces that can be optimally tailored make them very attractive delivery candidates for highly hydrophobic chemotherapeutic agents. Moreover, their inherent capacity to encapsulate these drugs and enhance their solubility profiles offers them unique advantages over conventional treatments...
September 6, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28866957/nanocarriers-for-brain-specific-delivery-of-anti-retro-viral-drugs-challenges-and-achievements
#13
Nila Mary Varghese, Senthil Venkatachalam, Shailendra K Saxena
HIV/AIDS is a global pandemic and the deleterious effects of Human Immunodeficiency Virus in the brain cannot be overlooked. Though the current Anti-Retro Viral therapy is able to reduce the virus load in the peripheral tissues of the body, the inability of the anti-retro viral drugs to cross the Blood Brain Barrier, as such, limits its therapeutic effect in the brain. The development of newer, successful nanoparticulate drug delivery systems to enhance the feasibility of the anti-retro viral drugs to the brain, offers a novel strategy to treat the AIDS related neuronal degradation...
September 4, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28862054/lysosomal-targeting-strategies-for-design-and-delivery-of-bioactive-for-therapeutic-interventions
#14
Ankur Sharma, Kalpesh Vaghasiya, Eupa Ray, Rahul Kumar Verma
Lysosomes are of particular interest for the design and delivery of pH dependent pro-drugs, enhancing selectivity and developing strategies to inhibit drug degradation inside the cells. There is great potential to bring intracellular drug delivery and distribution using nano-therapeutic approaches to target lysosomes for therapeutic interventions. Lysosomal targeting strategies involve two contrasting facets. One aspect is to directly target therapeutics to the lysosome through receptor-mediated endocytosis and the other facet involves strategies, which ensure escape from the lysosome in order to prevent their degradation, so that therapeutics may remain intact and available in the cytosol for their further action...
September 1, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28854819/functionalized-nanostructures-for-transdermal-delivery-of-drug-cargos
#15
Rabia Gul, Naveed Ahmed, Kifayat Ullah Shah, Gul Majid Khan, Asim Ur Rehman
Nanotechnology has burgeoned over last decade exploring varieties of novel applications in all areas of science and technology. Utilization of bio-friendly polymers for engineering nanostructures (NS) improves safety and efficacy in drug delivery. Biopolymers not merely employed for fabricating drug carriers but also leveraged for surface functionalization of other NS to impart bio-mimicking properties. Biopolymer functionalized NS garnered researcher's attention because of their potential to enhance skin permeability of drug cargo...
August 31, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28832230/professor-ruth-duncan-a-pioneer-in-the-field-of-polymer-therapeutics
#16
Ronit Satchi-Fainaro, María J Vicent, Simon Richardson
No abstract text is available yet for this article.
August 23, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28817988/interferon-dimers-ifn-peg-ifn
#17
Annabelle Herrington-Symes, Ji-Won Choi, Steve Brocchini
Increasingly complex proteins can be made by a recombinant chemical approach where proteins that can be made easily can be combined by site-specific chemical conjugation to form multifunctional or more active protein therapeutics. Protein dimers may display increased avidity for cell surface receptors. The increased size of protein dimers may also increase circulation times. Cytokines bind to cell surface receptors that dimerise, so much of the solvent accessible surface of a cytokine is involved in binding to its target...
August 18, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28817973/the-agma1-polyamidoamine-mediates-the-efficient-delivery-of-sirna
#18
Roberta Cavalli, Luca Primo, Roberto Sessa, Giulia Chiaverina, Laura di Blasio, Jenny Alongi, Amedea Manfredi, Elisabetta Ranucci, Paolo Ferruti
AGMA1, a prevailingly cationic, guanidine-bearing, linear, amphoteric polyamidoamine is an effective siRNA condensing agent. Here two AGMA1 samples of different molecular weight, i.e. AGMA1-5 and AGMA1-10 were evaluated as siRNA condensing agents and transfection promoters. AGMA1-10 formed stable polyplexes with a size lower than 50 nm and positive zeta potential. AGMA1-5 polyplexes were larger, about 100 nm in size. AGMA1-10 polyplexes, but not AGMA1-5 proved to be an effective intracellular siRNA carrier, able to trigger gene silencing in Hela and PC3 cell lines without eliciting cytotoxic effects...
August 18, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28812391/ph-sensitive-polymersomes-controlling-swelling-via-copolymer-structure-and-chemical-composition
#19
Simone Villani, Renata Adami, Ernesto Reverchon, Anna Maria Ferretti, Alessandro Ponti, Marilena Lepretti, Ivana Caputo, Lorella Izzo
pH-sensitive vesicles used as drug delivery systems (DDSs) are generally composed of protonable copolymers. The disaggregation of these nanoparticles (NPs) during drug release implies the dispersion of positively charged cytotoxic polyelectrolytes in the human body. To alleviate such issue, we synthesised A(BC)n amphiphilic block copolymers with linear (n = 1) and branched (n = 2) architectures to obtain pH-sensitive vesicles capable of releasing drugs in acidic conditions via controlled swelling instead of disaggregation...
August 16, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28812388/silk-nanoparticles-proof-of-lysosomotropic-anticancer-drug-delivery-at-single-cell-resolution
#20
John D Totten, Thidarat Wongpinyochit, F Philipp Seib
Silk nanoparticles are expected to improve chemotherapeutic drug targeting to solid tumours by exploiting tumour pathophysiology, modifying the cellular pharmacokinetics of the payload and ultimately resulting in trafficking to lysosomes and triggering drug release. However, experimental proof for lysosomotropic drug delivery by silk nanoparticles in live cells is lacking and the importance of lysosomal pH and enzymes controlling drug release is currently unknown. Here, we demonstrate, in live single human breast cancer cells, the role of the lysosomal environment in determining silk nanoparticle-mediated drug release...
August 16, 2017: Journal of Drug Targeting
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