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https://www.readbyqxmd.com/read/29342447/design-synthesis-and-anticancer-studies-of-novel-aminobenzazolyl-pyrimidines-as-tyrosine-kinase-inhibitors
#1
Rupesh Chikhale, Sonali Thorat, Rajan Kumar Choudhary, Nikhil Gadewal, Pramod Khedekar
Abnormal signalling from the Protein tyrosine kinases (PTKs) like receptor tyrosine kinases and intracellular tyrosine kinases can lead to diseases such as cancer especially non-small cell lung cancer, chronic myeloid leukaemia and gastrointestinal stromal tumours. Various Protein tyrosine kinase inhibitors are available but face poor bioavailability, severe toxicities and recent cases of drug-resistant cancers prompts for development of better drug molecules. In this study we report the design and development of a novel Protein Tyrosine Kinase (PTK) inhibitor on the basis of pharmacophore modelling...
January 4, 2018: Bioorganic Chemistry
https://www.readbyqxmd.com/read/29341915/influence-of-ligands-property-and-particle-size-of-gold-nanoparticles-on-the-protein-adsorption-and-corresponding-targeting-ability
#2
Wei Xiao, Jingyuan Xiong, Shuang Zhang, Yang Xiong, Huajin Zhang, Huile Gao
Nanoparticulated vesicles were widely used for carriers of drugs and imaging probes. To improve the targeting delivery efficiency of these vesicles, ligands were often functionalized onto their surfaces. However, the interaction between vesicles and plasma proteins may cover the ligands and hinder the targeting delivery. It is important to address the potential influence of ligands modification on plasma protein adsorption and the following targeting delivery. In this study, two common used ligands were chosen as the model: transferrin and RGD peptide...
January 13, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29341911/an-efficient-pegylated-gene-delivery-system-with-improved-targeting-synergism-between-octaarginine-and-a-fusogenic-peptide
#3
Ikramy A Khalil, Hideyoshi Harashima
Because of their ability to translocate different cargos into cells, arginine-rich cell penetrating peptides (CPPs) are promising vehicles for drug and gene delivery. The use of CPP-based carriers, however, is hampered by the lack of specificity and by interactions with negative serum components. Polyethylene glycol (PEG) is used to decrease such non-specific interactions, albeit its use is associated with reduced transfection efficiency. In this study, we describe the development of PEGylated CPP-based gene carrier with an improved targeting and a high transfection activity...
January 13, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29341907/molecular-level-elucidation-of-saccharin-assisted-rapid-dissolution-and-high-supersaturation-level-of-drug-from-eudragit%C3%A2-e-solid-dispersion
#4
Keisuke Ueda, Harunobu Kanaya, Kenjirou Higashi, Keiji Yamamoto, Kunikazu Moribe
In this work, the effect of saccharin (SAC) addition on the dissolution and supersaturation level of phenytoin (PHT)/Eudragit® E (EUD-E) solid dispersion (SD) at neutral pH was examined. The PHT/EUD-E SD showed a much slower dissolution of PHT compared to the PHT/EUD-E/SAC SD. EUD-E formed a gel layer after the dispersion of the PHT/EUD-E SD into an aqueous medium, resulting in a slow dissolution of PHT. Pre-dissolving SAC in the aqueous medium significantly improved the dissolution of the PHT/EUD-E SD. Solid-state 13C NMR measurements showed an ionic interaction between the tertiary amino group of EUD-E and the amide group of SAC in the EUD-E gel layer...
January 13, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29341887/molecular-basis-of-substrate-polyspecificity-of-the-candida-albicans-mdr1p-multidrug-h-antiporter
#5
Archana Kumari Redhu, Atanu Banerjee, Abdul Haseeb Shah, Alexis Moreno, Manpreet Kaur Rawal, Remya Nair, Pierre Falson, Rajendra Prasad
The molecular basis of polyspecificity of Mdr1p, a major drug/H+ antiporter of Candida albicans, is not elucidated. We have probed the nature of the drug-binding pocket by performing systematic mutagenesis of the 12 transmembrane segments. Replacement of the 252 amino acid residues with alanine or glycine yielded 2/3 neutral mutations while 1/3 led to the complete or selective lost of resistance to drugs or substrates transported by the pump. Using the GlpT-based 3D-model of Mdr1p, we roughly categorized these critical residues depending on their type and localization 1°/ main structural impact ("S" group), 2°/ exposure to the lipid interface ("L" group), 3°/ buried but not facing the main central pocket, inferred as critical for the overall H+/drug antiport mechanism ("M" group) and finally 4°/ buried and facing the main central pocket ("B" group)...
January 13, 2018: Journal of Molecular Biology
https://www.readbyqxmd.com/read/29341617/enhancing-docetaxel-delivery-to-multidrug-resistant-cancer-cells-with-albumin-coated-nanocrystals
#6
Sheryhan F Gad, Joonyoung Park, Ji Eun Park, Gihan N Fetih, Sozan S Tous, Wooin Lee, Yoon Yeo
Intravenous delivery of poorly water-soluble anticancer drugs such as docetaxel (DTX) is challenging due to the low bioavailability and the toxicity related to solubilizing excipients. Colloidal nanoparticles are used as alternative carriers, but low drug loading capacity and circulation instability limit their clinical translation. To address these challenges, DTX nanocrystals (NCs) were prepared using Pluronic F127 as an intermediate stabilizer and albumin as a functional surface modifier, which were previously found to be effective in producing small and stable NCs...
January 17, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29341585/self-powered-micro-fluidic-transport-system-based-on-triboelectric-nanogenerator-and-electrowetting-technique
#7
Nie Jinhui, Zewei Ren, Jiajia Shao, Chaoran Deng, Liang Xu, Xiangyu Chen, Meicheng Li, Zhong Lin Wang
Electrowetting technique is an actuation method for manipulating position and velocity of fluids in the microchannels. By combining electrowetting technique and a freestanding mode triboelectric nanogenerator (TENG), we have designed a self-powered micro-fluidic transport system. In this system, a mini vehicle is fabricated by using four droplets to carry a pallet (6 mm × 8 mm) and it can transport some tiny object on the track electrodes under the drive of TENG. The motion of TENG can provide both driving power and control signal for the mini vehicle...
January 17, 2018: ACS Nano
https://www.readbyqxmd.com/read/29341267/cross-linking-of-thiolated-paclitaxel-oligo-p-phenylene-vinylene-conjugates-aggregates-inside-tumor-cells-leads-to-chemical-locks-that-increase-drug-efficacy
#8
Lingyun Zhou, Fengting Lv, Libing Liu, Guizhi Shen, Xuehai Yan, Guillermo C Bazan, Shu Wang
How to reduce the resistance of certain tumor cells to paclitaxel (PTX) and related taxoid anticancer drugs is a major challenge for improving cure rates. An oligo(p-phenylenevinylene) unit with thiol groups and a PTX unit (OPV-S-PTX), which enhances drug efficacy and reverses resistance is thus designed. The mechanism involves diffusion of OPV-S-PTX into the cell, where π-π interactions lead to aggregation. Cross-linking of the aggregates via oxidation of thiol groups is favored in tumor cells because of the higher reactive oxygen species (ROS) concentration...
January 17, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29341245/pharmacokinetic-pharmacodynamic-drug-drug-interactions-of-avatrombopag-when-co-administered-with-dual-or-selective-cyp2c9-and-cyp3a-interacting-drugs
#9
Maiko Nomoto, Cynthia A Zamora, Edgar Schuck, Peter Boyd, Min-Kun Chang, Jagadeesh Aluri, Y Amy Siu, W George Lai, Sanae Yasuda, Jim Ferry, Bhaskar Rege
AIMS: Avatrombopag, a thrombopoietin receptor agonist, is a substrate of cytochrome P450 (CYP) 2C9 and CYP3A. We assessed three drug-drug interactions of avatrombopag as a victim with dual or selective CYP2C9/3A inhibitors and inducers. METHODS: This was a 3-part, open-label study. Forty-eight healthy subjects received single 20 mg doses of avatrombopag alone or with one of 3 CYP2C9/3A inhibitors or inducers: fluconazole 400 mg once daily for 16 days, itraconazole 200 mg twice daily on Day 1 and 200 mg once daily on Days 2-16, or rifampin 600 mg once daily for 16 days...
January 16, 2018: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29340978/methotrexate-aspasomes-against-rheumatoid-arthritis-optimized-hydrogel-loaded-liposomal-formulation-with-in-vivo-evaluation-in-wistar-rats
#10
Saikat Ghosh, Biswajit Mukherjee, Shreyasi Chaudhuri, Tanushree Roy, Alankar Mukherjee, Soma Sengupta
Aspasomes of methotrexate with antioxidant, ascorbyl palmitate, were developed and optimized using factorial design by varying parameters such as lipid molar ratio, drug to lipid molar ratio, and type of hydration buffer for transdermal delivery for disease modifying activity in rheumatoid arthritis (RA). Aspasomes were characterized by drug-excipients interaction, particle size analysis, determination of zeta potential, entrapment efficiency, and surface properties. The best formulation was loaded into hydrogel for evaluation of in vitro drug release and tested in vivo against adjuvant induced arthritis model in wistar rats, by assessing various physiological, biochemical, hematological, and histopathological parameters...
January 16, 2018: AAPS PharmSciTech
https://www.readbyqxmd.com/read/29340963/interactions-between-drugs-and-geriatric-syndromes-in-nursing-home-and-home-care-results-from-shelter-and-ibenc-projects
#11
Graziano Onder, Silvia Giovannini, Federica Sganga, Ester Manes-Gravina, Eva Topinkova, Harriet Finne-Soveri, Vjenka Garms-Homolová, Anja Declercq, Henriëtte G van der Roest, Pálmi V Jónsson, Hein van Hout, Roberto Bernabei
AIM: Drugs may interact with geriatric syndromes by playing a role in the continuation, recurrence or worsening of these conditions. Aim of this study is to assess the prevalence of interactions between drugs and three common geriatric syndromes (delirium, falls and urinary incontinence) among older adults in nursing home and home care in Europe. METHODS: We performed a cross-sectional multicenter study among 4023 nursing home residents participating in the Services and Health for Elderly in Long-TERm care (Shelter) project and 1469 home care patients participating in the Identifying best practices for care-dependent elderly by Benchmarking Costs and outcomes of community care (IBenC) project...
January 16, 2018: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/29340910/resistance-mechanism-in-a-terbinafine-resistant-strain-of-microsporum-canis
#12
Rui Kano, Yun-Hsia Hsiao, Han Hock Siew, Charles Chen, Atsuhiko Hasegawa, Hiroshi Kamata
To clarify the terbinafine (TRF) resistance mechanism in a TRF-resistant strain of Microsporum canis, the expression of the pleiotropic drug resistance (PDR1), multidrug resistance (MDR1), MDR2 and MDR4 genes were investigated by real-time quantitative PCR (RT-qPCR) analysis, given the known interaction of the corresponding proteins with antifungals and with the efflux blocker FK506. The expression of the PDR1, MDR1, MDR2 and MDR4 genes was 2-4 times higher in the TRF-resistant strain grown in the presence of 0...
January 16, 2018: Mycopathologia
https://www.readbyqxmd.com/read/29340866/-in-silico-study-of-the-binding-of-two-novel-antagonists-to-the-nociceptin-receptor
#13
Stefano Della Longa, Alessandro Arcovito
Antagonists of the nociceptin receptor (NOP) are raising interest for their possible clinical use as antidepressant drugs. Recently, the structure of NOP in complex with some piperidine-based antagonists has been revealed by X-ray crystallography. In this study, a multi-flexible docking (MF-docking) procedure, i.e. docking to multiple receptor conformations extracted by preliminary molecular dynamics trajectories, together with hybrid quantum mechanics/molecular mechanics (QM/MM) simulations have been carried out to provide the binding mode of two novel NOP antagonists, one of them selective (BTRX-246040, formerly named LY-2940094) and one non selective (AT-076), i...
January 16, 2018: Journal of Computer-aided Molecular Design
https://www.readbyqxmd.com/read/29340865/design-of-a-tripartite-network-for-the-prediction-of-drug-targets
#14
Ryo Kunimoto, Jürgen Bajorath
Drug-target networks have aided in many target prediction studies aiming at drug repurposing or the analysis of side effects. Conventional drug-target networks are bipartite. They contain two different types of nodes representing drugs and targets, respectively, and edges indicating pairwise drug-target interactions. In this work, we introduce a tripartite network consisting of drugs, other bioactive compounds, and targets from different sources. On the basis of analog relationships captured in the network and so-called neighbor targets of drugs, new drug targets can be inferred...
January 16, 2018: Journal of Computer-aided Molecular Design
https://www.readbyqxmd.com/read/29340732/-electronic-decision-support-to-promote-medication-safety
#15
REVIEW
Walter E Haefeli, Hanna M Seidling
Because of its inherent complexity, it is a considerable challenge to tailor drug treatment to a prevalent disease and its subgroups, which are increasingly defined by genomic variability (personalized medicine) and require consideration of context information such as co-morbidity, co-medication, patient preferences, and the specific characteristics of the healthcare sector. Thus, optimum treatment decisions might not be taken intuitively any longer, because decisions must be made both rapidly and increasingly based on analyses of complex relations of numerous variables that exceed the processing performance of a human brain...
January 16, 2018: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
https://www.readbyqxmd.com/read/29340718/drug-treatment-of-heart-failure-in-the-elderly
#16
REVIEW
D Berliner, J Bauersachs
The prevalence of heart failure increases with age. Changes in the age distribution and growing life expectancy will lead to a further rise. However, data concerning drug treatment of heart failure especially in the elderly are scarce. Subgroup analyses of the heart failure trials suggest that drug therapy in older patients should follow the recommendations in the current guidelines. In doing so, several common comorbidities in these patients (e. g., impaired renal function) have to be considered and may have an influence on the therapy (e...
January 16, 2018: Herz
https://www.readbyqxmd.com/read/29340618/mitochondrial-toxicity
#17
Joel N Meyer, Jessica H Hartman, Danielle F Mello
Recent decades have seen a rapid increase in reported toxic effects of drugs and pollutants on mitochondria. Researchers have also documented many genetic differences leading to mitochondrial diseases, currently reported to affect ∼1 person in 4,300, creating a large number of potential gene-environment interactions in mitochondrial toxicity. We briefly review this history, and then highlight cutting-edge areas of mitochondrial research including the role of mitochondrial reactive oxygen species in signaling; increased understanding of fundamental biological processes involved in mitochondrial homeostasis (DNA maintenance and mutagenesis, mitochondrial stress response pathways, fusion and fission, autophagy and biogenesis, and exocytosis); systemic effects resulting from mitochondrial stresses in specific cell types; mitochondrial involvement in immune function; the growing evidence of long-term effects of mitochondrial toxicity; mitochondrial-epigenetic cross-talk; and newer approaches to test chemicals for mitochondrial toxicity...
January 11, 2018: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29340048/alteration-of-mitochondrial-biogenesis-promotes-disease-progression-in-multiple-myeloma
#18
Xin Zhan, Wenjie Yu, Reinaldo Franqui-Machin, Melissa L Bates, Kalyan Nadiminti, Huojun Cao, Brad A Amendt, Yogesh Jethava, Ivana Frech, Fenghuang Zhan, Guido Tricot
Many cancers, including multiple myeloma (MM), retain more cytosolic iron to promote tumor cell growth and drug resistance. Higher cytosolic iron promotes oxidative damage due to its interaction with reactive oxygen species generated by mitochondria. The variation of mitochondrial biogenesis in different stages of MM disease was evaluated using gene expression profiles in a large clinical dataset. Sixteen of 18mitochondrial biogenesis related gene sets, including mitochondrial biogenesis signature and oxidative phosphorylation, were increased in myeloma cells compared with normal plasma cells and high expression was associated with an inferior patient outcome...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29340037/systemic-bioinformatics-analysis-of-recurrent-aphthous-stomatitis-gene-expression-profiles
#19
Jian Wu, Zheng-Ping Chen, An-Quan Shang, Wei-Wei Wang, Zong-Ning Chen, Yun-Juan Tao, Yue Zhou, Wan-Xiang Wang
Recurrent aphthous stomatitis (RAS) represents the most common chronic oral diseases with the prevalence ranges from 5% to 25% for different populations. Its pathogenesis remains poorly understood, which limits the development of effective drugs and treatment methods. In this study, we conducted systemic bioinformatics analysis of gene expression profiles from the Gene Expression Omnibus (GEO) to identify potential drug targets for RAS. We firstly downloaded the gene microarray datasets with the accession number of GSE37265 from GEO and performed robust multi-array (RMA) normalization with affy R programming package...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29339928/chemical-proteomics-an-integrated-research-engine-for-exploring-drug-target-phenotype-interactions
#20
EDITORIAL
Ho Jeong Kwon, Peter Karuso
No abstract text is available yet for this article.
2018: Proteome Science
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