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https://www.readbyqxmd.com/read/29928984/investigation-of-molecular-mobility-of-pressure-sensitive-adhesive-in-oxybutynin-patch-in-vitro-and-in-vivo-effect-of-sorbitan-monooleate-on-drug-release-and-patch-mechanical-property
#1
Wei Wang, Chao Liu, Zheng Luo, Xiaocao Wan, Liang Fang
The aim of present study was to develop an oxybutynin (OXY) transdermal patch with good permeation behavior and mechanical property. Special attention was paid to the effect of chemical enhancer on the molecular mobility of pressure sensitive adhesive (PSA) at molecular level. PSAs and permeation enhancers were investigated through in vitro experiment using rat skin. The optimized formulation was evaluated through pharmacokinetic study using rat. In addition, the molecular mechanism of sorbitan monooleate (Span® 80) in the improvement of PSA molecular mobility was investigated using FT-IR, molecular dynamics simulation, DSC and rheological study...
June 18, 2018: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29928798/spontaneous-fluctuations-can-guide-drug-design-strategies-for-structurally-disordered-proteins
#2
Barun Kumar Maity, Vicky Vishvakarma, Dayana Surendran, Anoop Rawat, Anirban Das, Shreya Pramanik, Najmul Arfin, Sudipta Maiti
Structure-based 'rational' drug-design strategies fail for diseases associated with intrinsically disordered proteins (IDPs). However, structural disorder allows large amplitude spontaneous intramolecular dynamics in a protein. We demonstrate a method that exploits this dynamics to provide quantitative information about the degree of interaction of an IDP with other molecules. A candidate ligand molecule may not bind strongly, but even momentary interactions can be expected to perturb the fluctuations. We measure the amplitude and frequency of the equilibrium fluctuations of fluorescently labeled small oligomers of hIAPP (an IDP associated with Type II diabetes) in a physiological solution, using nanosecond fluorescence cross-correlation spectroscopy...
June 21, 2018: Biochemistry
https://www.readbyqxmd.com/read/29928517/nutritional-status-and-muscle-dysfunction-in-chronic-respiratory-diseases-stable-phase-versus-acute-exacerbations
#3
REVIEW
Joaquim Gea, Antoni Sancho-Muñoz, Roberto Chalela
Nutritional abnormalities are frequent in different chronic respiratory diseases such as chronic obstructive pulmonary disease (COPD), bronchiectasis, cystic fibrosis (CF), interstitial fibrosis and lung cancer, having important clinical consequences. However, nutritional abnormalities often remained underdiagnosed due to the relative lack of awareness of health professionals. Therefore, systematic anthropometry or even better, assessment of body composition, should be performed in all patients with chronic respiratory conditions, especially following exacerbation periods when malnutrition becomes more accentuated...
May 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29928491/tnfaip8-promotes-prostate-cancer-cell-survival-by-inducing-autophagy
#4
Suryakant Niture, Malathi Ramalinga, Habib Kedir, Dorrelyn Patacsil, Samiksha S Niture, James Li, Haresh Mani, Simeng Suy, Sean Collins, Deepak Kumar
Tumor necrosis factor-α-inducible protein 8 (TNFAIP8) is a TNF-α inducible anti-apoptotic protein with multiple roles in tumor growth and survival. Mechanisms of cell survival by TNFAIP8 remain elusive. We investigated the role of TNFAIP8 in the regulation of the cell cycle, autophagy, cell survival and neuroendocrine differentiation in prostate cancer cells. We showed that TNFAIP8 dysregulates cell-cycle-related proteins, in PC3 cells. Oncogenic cell survival, drug resistance and dysregulation of cell cycle-related proteins are often associated with autophagy...
June 1, 2018: Oncotarget
https://www.readbyqxmd.com/read/29928343/sesquiterpene-lactone-6-o-angeloylplenolin-reverses-vincristine-resistance-by-inhibiting-yb-1-nuclear-translocation-in-colon-carcinoma-cells
#5
Changlong Li, Hezhen Wu, Yanfang Yang, Jianwen Liu, Zhenwen Chen
Multidrug resistance (MDR) is a major obstacle to cancer chemotherapy efficacy. In the present study, 6-O-angeloylplenolin repressed the overexpression of ATP binding cassette subfamily B member 1 ( MDR1 ) and increasing the intracellular concentration of anticancer drugs. A reduction in P-glycoprotein expression (encoded by MDR1 ) was observed in parallel with a decline in mRNA expression in vincristine-resistant HCT (HCT-8/VCR) cells treated with 6-O-angeloylplenolin. In addition, 6-O-angeloylplenolin suppressed the activity of the MDR1 gene promoter...
June 2018: Oncology Letters
https://www.readbyqxmd.com/read/29928301/the-mycoparasitic-fungus-clonostachys-rosea-responds-with-both-common-and-specific-gene-expression-during-interspecific-interactions-with-fungal-prey
#6
Kristiina Nygren, Mukesh Dubey, Antonio Zapparata, Mudassir Iqbal, Georgios D Tzelepis, Mikael Brandström Durling, Dan Funck Jensen, Magnus Karlsson
Clonostachys rosea is a necrotrophic mycoparasitic fungus, used for biological control of plant pathogenic fungi. A better understanding of the underlying mechanisms resulting in successful biocontrol is important for knowledge-based improvements of the application and use of biocontrol in agricultural production systems. Transcriptomic analyses revealed that C. rosea responded with both common and specific gene expression during interactions with the fungal prey species Botrytis cinerea and Fusarium graminearum ...
July 2018: Evolutionary Applications
https://www.readbyqxmd.com/read/29928219/acute-opioid-induced-myoclonic-reaction-after-use-of-fentanyl-as-an-anesthetic-drug-for-an-emergency-cesarean-section
#7
Dana Khaled Almedallah, Dana Yousef Alshamlan, Erum Mubbashir Shariff
Myoclonus is an abnormal involuntary movement that has been previously reported with administration of high doses of opioids for prolonged periods of time. In this case, however, we report an acute myoclonic reaction and review the literature on the possible causative pathophysiology. We report the case of a 24-year-old woman who was admitted for postdated cesarean section. She started to have abnormal involuntary movements after administration of an epidural anesthesia containing 700 μg of fentanyl with 115 mL (0...
May 2018: Case Reports in Neurology
https://www.readbyqxmd.com/read/29928007/a-cytokine-protein-protein-interaction-network-for-identifying-key-molecules-in-rheumatoid-arthritis
#8
Venugopal Panga, Srivatsan Raghunathan
Rheumatoid arthritis (RA) is a chronic inflammatory disease of the synovial joints. Though the current RA therapeutics such as disease-modifying antirheumatic drugs (DMARDs), nonsteroidal anti-inflammatory drugs (NSAIDs) and biologics can halt the progression of the disease, none of these would either dramatically reduce or cure RA. So, the identification of potential therapeutic targets and new therapies for RA are active areas of research. Several studies have discovered the involvement of cytokines in the pathogenesis of this disease...
2018: PloS One
https://www.readbyqxmd.com/read/29927956/staphylococcus-aureus-protein-a-causes-osteoblasts-to-hyper-mineralise-in-a-3d-extra-cellular-matrix-environment
#9
Nicola Kavanagh, Fergal J O'Brien, Steve W Kerrigan
Osteomyelitis is an inflammatory bone infection that is caused most commonly by the opportunistic pathogen Staphylococcus aureus. Research into staphylococcal induced bone infection is typically conducted using traditional 2D in vitro culture settings, which is not fully representative of the dynamic in vivo environment. In this study we utilised a collagen glycosaminoglycan scaffold, previously developed for bone tissue engineering, as a representative 3D model of infection. The scaffold resisted degradation and retained its pore structure, which is important for cellular function and survival, when seeded with both cells and bacteria...
2018: PloS One
https://www.readbyqxmd.com/read/29927717/drug-targeting-and-biomarkers-in-head-and-neck-cancers-insights-from-systems-biology-analyses
#10
Tania Islam, Rezanur Rahman, Esra Gov, Beste Turanli, Gizem Gulfidan, Anwarul Haque, Kazım Yalçın Arga, Nurul Haque Mollah
The head and neck squamous cell carcinoma (HNSCC) is one of the most common cancers in the world, but robust biomarkers and diagnostics are still not available. This study provides in-depth insights from systems biology analyses to identify molecular biomarker signatures to inform systematic drug targeting in HNSCC. Gene expression profiles from tumors and normal tissues of 22 patients with histological confirmation of nonmetastatic HNSCC were subjected to integrative analyses with genome-scale biomolecular networks (i...
June 2018: Omics: a Journal of Integrative Biology
https://www.readbyqxmd.com/read/29927611/in-silico-and-in-vitro-assessment-of-oatp1b1-inhibition-in-drug-discovery
#11
Matthew L Danielson, Geri A Sawada, Thomas J Raub, Prashant V Desai
The organic anion-transporting polypeptide 1B1 transporter belongs to the solute carrier superfamily and is highly expressed at the basolateral membrane of hepatocytes. Several clinical studies showed drug-drug interactions involving OATP1B1 thereby prompting the International Transporter Consortium to label OATP1B1 as a critical transporter that can influence a compound's disposition. To examine OATP1B1 inhibition early in the drug discovery process, we established a medium-throughput concentration-dependent OATP1B1 assay...
June 21, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29927603/molecular-insight-into-drug-loading-capacity-of-peg-plga-nanoparticles-for-itraconazole
#12
Natalia Wilkosz, Grzegorz Łazarski, Lubomír Kováčik, Patrycja Gargas, Maria Nowakowska, Dorota Jamróz, Mariusz Kepczynski
Nanoparticles made of amphiphilic block copolymers comprising biodegradable core-forming blocks are very attractive for the preparation of drug delivery systems with sustained release. Their therapeutic applications are, however, hindered by low values of the drug loading content (DLC). The compatibility between the drug and the core-forming block of the copolymer is considered the most important factor affecting the DLC value. However, the molecular picture of the hydrophobic drug - copolymer interaction is still not fully recognized...
June 21, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29927572/modulation-of-the-allosteric-communication-between-the-polo-box-domain-and-the-catalytic-domain-in-plk1-by-small-compounds
#13
Monika Raab, Mourad Sanhaji, Larissa Pietsch, Isabelle Béquignon, Amanda K Herbrand, Evelyn Süß, Santosh L Gande, Birgit Caspar, Denis Kudlinzki, Krishna Saxena, Sridhar Sreeramulu, Harald Schwalbe, Klaus Strebhardt, Ricardo M Biondi
The Polo-like kinases (Plks) are an evolutionary conserved family of Ser/Thr protein kinases that possess, in addition to the classical kinase domain at the N-terminus, a C-terminal polo-box domain (PBD) that binds to phosphorylated proteins, modulates the kinase activity and its localization. Plk1, which regulates the formation of the mitotic spindle, has emerged as a validated drug target for the treatment of cancer, because it is required for numerous types of cancer cells but not for the cell division in non-cancer cells...
June 21, 2018: ACS Chemical Biology
https://www.readbyqxmd.com/read/29927449/real-time-observation-of-leukocyte-endothelium-interactions-in-tissue-engineered-blood-vessel
#14
Z Chen, M Tang, D Huang, W Jiang, M Li, H Ji, J Park, B Xu, L J Atchison, G A Truskey, K W Leong
Human cell-based 3D tissue constructs play an increasing role in disease modeling and drug screening. Inflammation, atherosclerosis, and many autoimmune disorders involve the interactions between immune cells and blood vessels. However, it has been difficult to image and model these interactions under realistic conditions. In this study, we fabricated a perfusion and imaging chamber to allow the real-time visualization of leukocyte perfusion, adhesion, and migration inside a tissue-engineered blood vessel (TEBV)...
June 21, 2018: Lab on a Chip
https://www.readbyqxmd.com/read/29927082/computational-methods-for-predicting-protein-protein-interactions-using-various-protein-features
#15
Ziyun Ding, Daisuke Kihara
Understanding protein-protein interactions (PPIs) in a cell is essential for learning protein functions, pathways, and mechanism of diseases. PPIs are also important targets for developing drugs. Experimental methods, both small-scale and large-scale, have identified PPIs in several model organisms. However, results cover only a part of PPIs of organisms; moreover, there are many organisms whose PPIs have not yet been investigated. To complement experimental methods, many computational methods have been developed that predict PPIs from various characteristics of proteins...
June 21, 2018: Current Protocols in Protein Science
https://www.readbyqxmd.com/read/29927081/overview-of-genetically-engineered-mouse-models-of-prostate-cancer-and-their-applications-in-drug-discovery
#16
Gianluca Civenni, Giuseppina M Carbone, Carlo V Catapano
Prostate cancer (PCa) is the most common malignant visceral neoplasm in males in Western countries. Despite progress made in the early treatment of localized malignancies, there remains a need for therapies effective against advanced forms of the disease. Genetically engineered mouse (GEM) models are valuable tools for addressing this issue, particularly in defining the cellular and molecular mechanisms responsible for tumor initiation and progression. While cell and tissue culture systems are important models for this purpose as well, they cannot recapitulate the complex interactions within heterotypic cells and the tumor microenvironment that are crucial in the initiation and progression of prostate tumors...
June 7, 2018: Current Protocols in Pharmacology
https://www.readbyqxmd.com/read/29927068/docking-of-covalent-ligands-challenges-and-approaches
#17
REVIEW
Christoph Sotriffer
Covalent ligands have recently regained considerable attention in drug discovery. The rational design of such ligands, however, is still faced with particular challenges, mostly related to the fact that covalent bond formation is a quantum mechanical phenomenon which cannot adequately be handled by the force fields or empirical approaches typically used for noncovalent protein-ligand interactions. Although the necessity for quantum chemical approaches is clear, they cannot yet routinely be applied on large data sets of ligands or for a broader exploration of binding modes in docking calculations...
June 21, 2018: Molecular Informatics
https://www.readbyqxmd.com/read/29927029/modified-peptide-inhibitors-of-the-keap1-nrf2-protein-protein-interaction-incorporating-unnatural-amino-acids
#18
Nikolaos D Georgakopoulos, Sandeep K Talapatra, Jemma Gatliff, Frank Kozielski, Geoff Wells
Non-covalent inhibitors of the Keap1-Nrf2 protein-protein interaction (PPI) have therapeutic potential in a range of disease states including neurodegenerative diseases (Parkinson's and Alzheimer's diseases), chronic obstructive pulmonary disease and various inflammatory conditions. By stalling Keap1-mediated ubiquitination of Nrf2, such compounds can enhance Nrf2 transcriptional activity and activate the expression of a range of genes with antioxidant response elements (AREs) in their promoter regions. Keap1 inhibitors have been identified based on peptide and small molecule templates...
June 21, 2018: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/29926968/effect-of-tildrakizumab-mk-3222-a-high-affinity-selective-anti-il23p19-monoclonal-antibody-on-cytochrome-p450-metabolism-in-subjects-with-moderate-to-severe-psoriasis
#19
S Khalilieh, A Hussain, D Montgomery, V Levine, P M Shaw, I Bodrug, L Mekokishvili, C Bailey-Smith, X S Glasgow, A Cheng, M Martinho, M Iwamoto
AIMS: Tildrakizumab, an interleukin (IL)-23 inhibitor, is indicated for the treatment of moderate to severe chronic plaque psoriasis. Although tildrakizumab is not metabolized by, and does not alter, cytochrome P450 (CYP) expression in vitro, clinically-significant pharmacokinetic effects through changes in systemic inflammation, which alters CYP metabolism, have been well documented. At the time of study conduct, the effect of modulation of inflammation/cytokines, including IL-23 inhibition with tildrakizumab, on CYP metabolism, and therefore the potential for disease-drug interactions, in psoriasis patients was unknown...
June 21, 2018: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29926809/enhancing-adsorption-capacity-while-maintaining-specific-recognition-performance-of-mesoporous-silica-a-novel-imprinting-strategy-with-amphiphilic-ionic-liquid-as-surfactant
#20
Shichao Ding, Zhiling Li, Yuan Cheng, Chunbao Du, Junfeng Gao, Yong-Wei Zhang, Nan Zhang, Zhaotong Li, Ninghui Chang, Xiaoling Hu
In order to facilitate the broad applications of molecular recognition materials in biomedical areas, it is critical to enhance their adsorption capacity while maintaining their excellent recognition performance. In this work, we designed and synthesized well-defined peptide-imprinted mesoporous silica (PIMS) for specific recognition of an immunostimulating hexapeptide from human casein (IHHC) by using amphiphilic ionic liquid as the surfactant to anchor IHHC via a combination of one step sol-gel method and docking oriented imprinting approach...
June 21, 2018: Nanotechnology
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