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https://www.readbyqxmd.com/read/28432957/nanoencapsulation-strategies-for-the-delivery-of-novel-bifunctional-antioxidant-%C3%AF-1-selective-ligands
#1
Claudia Carbone, Emanuela Arena, Veronica Pepe, Orazio Prezzavento, Ivana Cacciatore, Hasan Turkez, Agostino Marrazzo, Antonio Di Stefano, Giovanni Puglisi
Nowadays sigma-1 receptors are considered as new therapeutic objectives for central nervous system neurodegenerative diseases. Among different molecules, alpha lipoic acid has been identified as a natural potent antioxidant drug, whose therapeutic efficacy is limited by its many drawbacks, such as fast metabolism, poor bioavailability and high physico-chemical instability. Alfa-lipoic acid derivatives have been recently developed demonstrating their neuroprotective activity and effectiveness in different types of oxidative stress...
April 12, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28432913/spontaneously-formed-redox-and-ph-sensitive-polymersomes-by-mpeg-based-cytocompatible-random-copolymers
#2
Partha Laskar, Joykrishna Dey, Sudip Kumar Ghosh
Stimuli-sensitive polymersomes are one of the important vehicles and have been extensively studied as smart drug delivery system. Polymersomes have added advantage over the micelles because of having the ability to carry not only hydrophobic but also hydrophilic guest in their aqueous core. Among various stimuli, the change of pH and redox reaction is very important for drug delivery purpose especially for anticancer drug. Therefore, in this work, two poly(ethylene glycol) methyl ether methacrylate (mPEG) containing hydrophilic random anionic copolymers, poly[(2-hydroxyethyl methacrylate-3,3'-dithiodipropanoic acid)x-co-(poly(ethylene glycol) methyl ether methacrylate)y], poly[(HEMA-DTDPA)x-co-mPEGy] with different copolymer ratios were designed and synthesized...
April 12, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28432812/preparation-characterization-and-in-vivo-study-of-rhein-solid-lipid-nanoparticles-for-oral-delivery
#3
Haiyang Feng, Yuping Zhu, Zhixuan Fu, Dechuan Li
In this study, rhein-SLNs were successfully produced by hot homogenization followed by ultrasonication. Precirol ATO5 in which Rhein exhibited higher partition coefficient was selected for preparation of SLNs. In the dynamic light scattering, the rhein SLNs showed a smaller size with a mean value of 120.8 ± 7.9 nm and with zeta potential of -16.9 ± 2.3 mV. SLNs exhibited a good stability during the period of 2 months. The SLNs indicated faster drug release with a burst release within 2 hours and followed by a sustained release with a biphasic drug release pattern...
April 22, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28432615/fabrication-physicochemical-characterization-and-performance-evaluation-of-biodegradable-polymeric-microneedle-patch-system-for-enhanced-transcutaneous-flux-of-high-molecular-weight-therapeutics
#4
Viral Shah, Bijaya Krushna Choudhury
A revolutionary paradigm shift is being observed currently, towards the use of therapeutic biologics for disease management. The present research was focused on designing an efficient dosage form for transdermal delivery of α-choriogonadotropin (high molecular weight biologic), through biodegradable polymeric microneedles. Polyvinylpyrrolidone-based biodegradable microneedle arrays loaded with high molecular weight polypeptide, α-choriogonadotropin, were fabricated for its systemic delivery via transdermal route...
April 21, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28432531/effectiveness-of-nanoencapsulated-methotrexate-against-osteosarcoma-cells-in-vitro-cytotoxicity-under-dynamic-conditions
#5
O Mitxelena-Iribarren, C L Hisey, M Errazquin-Irigoyen, Y González-Fernández, E Imbuluzqueta, M Mujika, M J Blanco-Prieto, S Arana
Cancer is a leading cause of mortality in the world, with osteosarcoma being one of the most common types among children between 1 and 14 years old. Current treatments including preoperative chemotherapy, surgery and postoperative chemotherapy produce several side effects with limited effectiveness. The use of lipid nanoparticles as biodegradable shells for controlled drug delivery shows promise as a more effective and targeted tumor treatment. However, in vitro validation of these vehicles is limited due to fluid stagnation in current techniques, in which nanoparticles sediment onto the bottom of the wells killing the cells by asphyxiation...
June 2017: Biomedical Microdevices
https://www.readbyqxmd.com/read/28432472/anti-infective-and-anti-inflammatory-pharmacotherapies
#6
Mark I Rosenblatt
Ocular infection and inflammation are common and are associated with myriad ocular conditions ranging from mild disease to blinding conditions. There are numerous anti-invectives with spectra against inciting pathogens. Given the potential for ocular infections to rapidly progress initial broad spectrum therapy is usually required, with therapy tailored as microbiological identification and sensitivities become available. The emergence of antibiotic resistance has become a major health problem. Anti-inflammatory therapy can be institutes to prevent ocular symptoms and end-organ damage...
April 22, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28432037/investigating-in-vitro-and-in-vivo-%C3%AE-v%C3%AE-6-integrin-receptor-targeting-liposomal-alendronate-for-combinatory-%C3%AE-%C3%AE-t-cell-immunotherapy
#7
Naomi O Hodgins, Wafa' T Al-Jamal, Julie T-W Wang, Rebecca Klippstein, Jane K Sosabowski, John F Marshall, John Maher, Khuloud T Al-Jamal
The αvβ6 integrin receptor has been shown to be overexpressed on many types of cancer cells, resulting in a more pro-invasive and aggressive phenotype, this makes it an attractive target for selective drug delivery. In tumours that over-express the αvβ6 receptor, cellular uptake of liposomes can be enhanced using ligand-targeted liposomes. It has previously been shown in both in vitro and in vivo studies that liposomal alendronate (L-ALD) can sensitise cancer cells to destruction by Vγ9Vδ2 T cells. It is hypothesised that by using the αvβ6-specific peptide A20FMDV2 as a targeting moiety for L-ALD, the therapeutic efficacy of this therapy can be increased in αvβ6 positive tumours...
April 18, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28432019/feasibility-of-mini-tablets-as-a-flexible-drug-delivery-tool
#8
Biplob Mitra, Jessica Chang, Sy-Juen Wu, Chad N Wolfe, Robert L Ternik, Thomas Z Gunter, Michael C Victor
Mini-tablets have potential applications as a flexible drug delivery tool in addition to their generally perceived use as multi-particulates. That is, mini-tablets could provide flexibility in dose finding studies and/or allow for combination therapies in the clinic. Moreover, mini-tablets with well controlled quality attributes could be a prudent choice for administering solid dosage forms as a single unit or composite of multiple mini-tablets in patient populations with swallowing difficulties (e.g., pediatric and geriatric populations)...
April 18, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28432017/dual-functional-nanoparticles-for-precise-drug-delivery-to-alzheimer-s-disease-lesions-targeting-mechanisms-pharmacodynamics-and-safety
#9
Xiaoyao Zheng, Chi Zhang, Qian Guo, Xu Wan, Xiayan Shao, Qingfeng Liu, Qizhi Zhang
Alzheimer's disease (AD) is the most common form of dementia and is characterized by the cerebral accumulation of extracellular amyloid plaques. In a previous study, this histopathological hallmark was used as a target on a dual-functional nanoparticle (TQNP) to deliver biotechnological drugs, such as the H102 peptide, a β-sheet breaker, to AD lesions precisely. This delivery system could reduce the amyloid-β (Aβ) burden in the brains of AD model mice, as well as ameliorated the memory impairment of the mice...
April 18, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28432016/inkjet-printing-of-antiviral-pcl-nanoparticles-and-anticancer-cyclodextrin-inclusion-complexes-on-bioadhesive-film-for-cervical-administration
#10
Cem Varan, Henrika Wickström, Niklas Sandler, Yeşim Aktaş, Erem Bilensoy
Personalized medicine is an important treatment approach for diseases like cancer with high intrasubject variability. In this framework, printing is one of the most promising methods since it permits dose and geometry adjustment of the final product. With this study, a combination product consisting of anticancer (paclitaxel) and antiviral (cidofovir) drugs was manufactured by inkjet printing onto adhesive film for local treatment of cervical cancers as a result of HPV infection. Furthermore, solubility problem of paclitaxel was overcome by maintaining this poorly soluble drug in a cyclodextrin inclusion complex and release of cidofovir was controlled by encapsulation in polycaprolactone nanoparticles...
April 18, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28431688/thermal-desorption-gas-chromatographic-methodology-for-the-determination-of-residual-solvents-in-mesoporous-silica
#11
Adissu Alemayehu Asfaw, Kris Wolfs, Ann Van Schepdael, Erwin Adams
In this work, thermal desorption-gas chromatography-flame ionization detection (TD-GC-FID) was adapted to enable the determination of residual solvents (RS) in mesoporous silica (MPSi). MPSi is often utilized in various pharmaceutical formulations or drug delivery systems and the accurate determination of RS is an important part of pharmaceutical quality control. Seven commonly used solvents (methanol, ethanol, acetone, isopropanol, dichloromethane, tetrahydrofuran and hexafluoroisopropanol) were evaluated in combination with 3 types of MPSi having pore sizes of 2-3, 15 and 25nm...
April 12, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28431428/computational-and-in-vitro-experimental-investigation-of-intrathecal-drug-distribution-parametric-study-of-the-effect-of-injection-volume-cerebrospinal-fluid-pulsatility-and-drug-uptake
#12
Kevin M Tangen, Roxanne Leval, Ankit I Mehta, Andreas A Linninger
BACKGROUND: Intrathecal drug delivery is an attractive option to circumvent the blood-brain barrier for pain management through its increased efficacy of pain relief, reduction in adverse side effects, and cost-effectiveness. Unfortunately, there are limited guidelines for physicians to choose infusion or drug pump settings to administer therapeutic doses to specific regions of the spine or the brain. Although empiric trialing of intrathecal drugs is critical to determine the sustained side effects, currently there is no inexpensive in vitro method to guide the selection of spinal drug delivery parameters...
May 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28431329/stealth-recombinant-human-serum-albumin-nanoparticles-conjugating-5-fluorouracil-augmented-drug-delivery-and-cytotoxicity-in-human-colon-cancer-ht-29-cells
#13
Ankita Sharma, Amanpreet Kaur, Upendra Kumar Jain, Ramesh Chandra, Jitender Madan
BACKGROUND AND OBJECTIVE: 5-Fluorouracil (5-FU) is a first-line chemotherapeutic drug in colorectal cancer. However, intravenous administration of 5-FU at the dose of 7-12mg/kg exhibits curbs like short half-life (20min) and toxic side-effects on bone marrow cells. Therefore, in present investigation, 5-FU was conjugated to poly (ethylene glycol) anchored recombinant human serum albumin nanoparticles (5-FU-rHSA-PEG-NPs) to improve the pharmacokinetic and therapeutic profiles. METHODS AND RESULTS: The mean particle size of 5-FU-rHSA-NPs was measured to be 44...
April 12, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28431209/drug-delivery-systems-based-on-hydroxyethyl-starch
#14
Constantinos M Paleos, Zili Sideratou, Dimitris Tsiourvas
Τhe advantageous biological properties of hydroxyethyl starch (HES) triggered research interest towards design and synthesis of Drug Delivery Systems (DDSs) based on this polysaccharide. Convenient reaction schemes, including one-step reactions, led to the synthesis of HES conjugates with selected anticancer molecules or therapeutic proteins. Nanocapsules and hydrogels based on HES were also prepared and studied as prospective drug delivery systems. Formulations originating from these drug conjugates and also from nanocapsules and hydrogels loaded with drugs were characterized, highlighting on the extension of their half-life in plasma which is a critical property as far as their efficacy is concerned...
April 21, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28430651/doxorubicin-loaded-platelets-conjugated-with-anti-cd22-mabs-a-novel-targeted-delivery-system-for-lymphoma-treatment-with-cardiopulmonary-avoidance
#15
Peipei Xu, Huaqin Zuo, Rongfu Zhou, Fan Wang, Xu Liu, Jian Ouyang, Bing Chen
B-cell lymphoma accounts for approximately 85% of all adult non-Hodgkin's lymphoma cases. Doxorubicin (DOX) is an indispensable drug for the treatment of non-Hodgkin's lymphoma. However, DOX causes severe cardiotoxicity, which limits its use in conventional treatment strategies. In this study, we developed a novel drug delivery system for lymphoma treatment: DOX-loaded platelets that were conjugated with anti-CD22 monoclonal antibodies (mAbs) (DOX-platelet-CD22). Platelets are bio- and immune-compatible drug carriers that can prolong the circulation time of drugs...
April 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28430205/controlled-membrane-translocation-provides-a-mechanism-for-signal-transduction-and-amplification
#16
Matthew J Langton, Flore Keymeulen, Maria Ciaccia, Nicholas H Williams, Christopher A Hunter
Transmission and amplification of chemical signals across lipid bilayer membranes is of profound significance in many biological processes, from the development of multicellular organisms to information processing in the nervous system. In biology, membrane-spanning proteins are responsible for the transmission of chemical signals across membranes, and signal transduction is often associated with an amplified signalling cascade. The ability to reproduce such processes in artificial systems has potential applications in sensing, controlled drug delivery and communication between compartments in tissue-like constructs of synthetic vesicles...
May 2017: Nature Chemistry
https://www.readbyqxmd.com/read/28430010/prolonged-injectable-formulation-of-nafarelin-using-in-situ-gel-combination-delivery-system
#17
Behnoush Alizadeh, Nika Bahari Javan, Hamid Akbari Javar, Mohammad Reza Khoshayand, Farid Abedin Dorkoosh
The principal purpose of the present study was to prepare and characterize a complex drug delivery system consisting of Nafarelin- poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) nanoparticles (NPs) in combination with sodium alginate/poloxamer 407 in situ gel. Nafarelin loaded PHBV NPs were prepared via double emulsion solvent evaporation technique. Box-Behnken Response Surface Methodology was utilized to optimize NPs. Mean particle size, polydispersity index (PDI), entrapment efficiency (EE) and drug loading (DL) of the optimized NPs were measured...
April 21, 2017: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/28429938/high-resolution-accurate-mass-mass-spectrometry-enables-in-depth-characterization-of-in-vivo-biotransformations-for-intact-antibody-drug-conjugates
#18
Jintang He, Dian Su, Carl K Ng, Luna Liu, Shang-Fan Yu, Thomas H Pillow, Geoffrey Del Rosario, Martine Darwish, Byoung-Chul Lee, Rachana Ohri, Hongxiang Zhou, Xueji Wang, Jiawei Lu, Surinder Kaur, Keyang Xu
Antibody-drug conjugates (ADCs) represent a promising class of therapeutics for the targeted delivery of highly potent cytotoxic drugs to tumor cells to improve bioactivity while minimizing side effects. ADCs are composed of both small and large molecules, and therefore have complex molecular structures. In vivo biotransformations may further increase the complexity of ADCs, representing a unique challenge for bioanalytical assays. Quadrupole time-of-flight mass spectrometry (Q-TOF MS) with electrospray ionization has been widely used for characterization of intact ADCs...
April 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28429809/successful-pegylation-of-hollow-encapsulin-nanoparticles-from-rhodococcus-erythropolis-n771-without-affecting-their-disassembly-and-reassembly-properties
#19
Seiichi Sonotaki, Taku Takami, Keiichi Noguchi, Masafumi Odaka, Masafumi Yohda, Yoshihiko Murakami
We developed a hollow PEGylated encapsulin nanoparticle from Rhodococcus erythropolis N771. The hollow engineered encapsulin nanoparticles with His-Tag and Lys residues on the surface were constructed by means of genetic recombination. The Lys residues on the particle surface were successfully PEGylated with a PEG derivative, methoxy-PEG-SCM. Consequently, we demonstrated that the hollow PEGylated engineered encapsulin nanoparticle could successfully disassemble or reassemble even after PEGylation in the presence or absence of a protein denaturing agent...
April 21, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28429523/poly-cytosine-dna-as-a-high-affinity-ligand-for-inorganic-nanomaterials
#20
Chang Lu, Zhicheng Huang, Biwu Liu, Yibo Liu, Yibin Ying, Juewen Liu
Attaching DNA to nanomaterials is the basis for DNA-directed assembly, sensing, and drug delivery using such hybrid materials. Poly-cytosine (poly-C) DNA is a high affinity ligand for four types of commonly used nanomaterials, including nanocarbons (graphene oxide and single-walled carbon nanotubes), transition metal dichalcogenides (MoS2 and WS2 ), metal oxides (Fe3 O4 and ZnO), and metal nanoparticles (Au and Ag). Compared to other homo-DNA sequences, poly-C DNA has the highest affinity for the first three types of materials...
April 21, 2017: Angewandte Chemie
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