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https://www.readbyqxmd.com/read/28812195/design-and-evaluation-of-a-compact-photocatalytic-reactor-for-water-treatment
#1
Marko Kete, Olena Pliekhova, Lev Matoh, Urška Lavrenčič Štangar
A compact reactor for photocatalytic oxidation and photocatalytic ozonation water treatment was developed and evaluated by using four model pollutants. Additionally, combinations of pollutants were evaluated. Specially produced Al2O3 porous reticulated monolith foams served as TiO2 carriers, offering a high surface area support. UV lamps were placed in the interior to achieve reduced dimensions of the reactor (12 cm in diameter × 20 cm in height). Despite its small size, the overall photocatalytic cleaning capacity was substantial...
August 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28810166/humanized-mouse-models-of-latent-hiv-infection
#2
REVIEW
Maud Deruaz, Andrew M Tager
Antiretroviral therapy can efficiently control HIV viral replication, resulting in low viral loads and sustained CD4(+) T cell counts in HIV-infected persons. However, fast viral rebound occurs in most infected persons when therapy is interrupted. The principal component of persistent infection is a latent but replication-competent HIV reservoir. The long half-life of this reservoir is a major barrier to cure, and its elimination is the target of important research efforts. Animal models that can recapitulate this aspect of human infection are needed to examine the HIV reservoir in tissues in vivo, and to test eradication strategies...
August 12, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/28809443/characterisation-in-vitro-and-in-vivo-evaluation-of-valproic-acid-loaded-nanoemulsion-for-improved-brain-bioavailability
#3
Suk Fei Tan, Brian P Kirby, Johnson Stanslas, Hamidon Bin Basri
OBJECTIVE: This study was aimed to investigate the potential of formulated valproic acid-encapsulated nanoemulsion (VANE) to improve the brain bioavailability of valproic acid (VPA). METHODS: Valproic acid-encapsulated nanoemulsions were formulated and physically characterised (osmolarity, viscosity, drug content, drug encapsulation efficiency). Further investigations were also conducted to estimate the drug release, cytotoxic profile, in-vitro blood-brain barrier (BBB) permeability, pharmacokinetic parameter and the concentration of VPA and VANE in blood and brain...
August 15, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28809432/intranasal-administration-of-brain-targeted-hp-%C3%AE-cd-chitosan-nanoparticles-for-delivery-of-scutellarin-a-compound-with-protective-effect-in-cerebral-ischaemia
#4
Shanshan Liu, Paul C Ho
OBJECTIVES: Scutellarin (SCU) is a traditional Chinese medicine used for the treatment of ischaemic cerebrovascular disease, but its clinic applications have been limited due to its poor water solubility, poor bioavailability and short half-life. In comparison with the conventional oral and intravenous administration, nasal administration may help targeting the drug more directly to brain. Thus, we proposed to employ a novel SCU-loaded HP-β-CD/chitosan nanoparticles (CD/CS-SCU-NPs) to deliver SCU to brain through the nasal route...
August 15, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28808818/first-in-human-study-of-the-epichaperome-inhibitor-pu-h71-clinical-results-and-metabolic-profile
#5
Giovanna Speranza, Larry Anderson, Alice P Chen, Khanh Do, Michelle Eugeni, Marcie Weil, Larry Rubinstein, Eva Majerova, Jerry Collins, Yvonne Horneffer, Lamin Juwara, Jennifer Zlott, Rachel Bishop, Barbara A Conley, Howard Streicher, Joseph Tomaszewski, James H Doroshow, Shivaani Kummar
Background Molecular chaperone targeting has shown promise as a therapeutic approach in human cancers of various histologies and genetic backgrounds. The purine-scaffold inhibitor PU-H71 (NSC 750424), selective for Hsp90 in epichaperome networks, has demonstrated antitumor activity in multiple preclinical cancer models. The present study was a first in-human trial of PU-H71 aimed at establishing its safety and tolerability and characterizing its pharmacokinetic (PK) profile on a weekly administration schedule in human subjects with solid tumors refractory to standard treatments...
August 12, 2017: Investigational New Drugs
https://www.readbyqxmd.com/read/28808036/reducing-posttreatment-relapse-in-cleft-lip-palatal-expansion-using-an-injectable-estrogen-nanodiamond-hydrogel
#6
Christine Hong, Dayoung Song, Dong-Keun Lee, Lawrence Lin, Hsin Chuan Pan, Deborah Lee, Peng Deng, Zhenqing Liu, Danny Hadaya, Hye-Lim Lee, Abdulaziz Mohammad, Xinli Zhang, Min Lee, Cun-Yu Wang, Dean Ho
Patients with cleft lip and/or palate (CLP), who undergo numerous medical interventions from infancy, can suffer from lifelong debilitation caused by underdeveloped maxillae. Conventional treatment approaches use maxillary expansion techniques to develop normal speech, achieve functional occlusion for nutrition intake, and improve esthetics. However, as patients with CLP congenitally lack bone in the cleft site with diminished capacity for bone formation in the expanded palate, more than 80% of the patient population experiences significant postexpansion relapse...
August 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28807912/safety-and-efficacy-of-mhaa4549a-a-broadly-neutralizing-monoclonal-antibody-in-a-human-influenza-a-challenge-model-a-phase-2-randomized-trial
#7
Jacqueline M McBride, Jeremy J Lim, Tracy Burgess, Rong Deng, Michael A Derby, Mauricio Maia, Priscilla Horn, Omer Siddiqui, Daniel Sheinson, Haiyin Chen-Harris, Elizabeth M Newton, Dimitri Fillos, Denise Nazzal, Carrie M Rosenberger, Maikke B Ohlson, Rob Lambkin-Williams, Hosnieh Fathi, Jeffrey M Harris, Jorge A Tavel
BACKGROUND: MHAA4549A, a human monoclonal antibody targeting the hemagglutinin stalk region of influenza A virus (IAV), is being developed as a therapeutic for patients hospitalized with severe IAV infection. Safety and efficacy of MHAA4549A were assessed in a randomized, double-blind, placebo-controlled, dose-ranging study in a human IAV-challenge model. METHODS: One hundred healthy volunteers were inoculated with A/Wisconsin/67/2005 (H3N2) IAV and, 24-36 hours later, administered a single intravenous dose of either placebo, MHAA4549A (400, 1200, or 3600 mg) or a standard oral dose of oseltamivir...
August 14, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28807830/usp5-promotes-tumorigenesis-and-progression-of-pancreatic-cancer-by-stabilizing-foxm1-protein
#8
Xin-Yan Li, Hai-Yun Wu, Xiao-Fang Mao, Li-Xin Jiang, Yong-Xiang Wang
Increased ubiquitin-specific protease 5 (USP5) has been associated with tumorigenesis of malignancy including glioblastoma, melanoma and hepatocellular carcinoma. However, the role of USP5 in tumorigenesis of pancreatic ductal adenocarcinoma (PDAC) has not been studied yet. In this study, we demonstrated that USP5 was significantly upregulated in a panel of PDAC cell lines and correlated with FoxM1 protein expression. USP5 knockdown inhibited proliferation of PANC-1 and SW1990, two PDAC cell lines. In the mouse xenografted pancreatic tumor model, suppression of USP5 significantly decreased tumor growth, correlated with down regulation of FoxM1...
August 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28806478/successful-stepdown-treatment-of-pulmonary-histoplasmosis-with-thrice-weekly-liposomal-amphotericin-b-in-a-hospital-associated-outpatient-infusion-centre-a-case-report
#9
P O Lewis, I Khan, P Patel
WHAT IS KNOWN AND OBJECTIVE: Amphotericin is the preferred treatment for pulmonary histoplasmosis during pregnancy. The long half-life of amphotericin supports less than daily administration. CASE SUMMARY: A 28-year-old pregnant woman diagnosed with recurrent pulmonary histoplasmosis was initiated on liposomal amphotericin 250 mg (4 mg/kg) intravenously daily. After 2 weeks, the patient was discharged and successfully received 250 mg thrice weekly at a hospital-associated outpatient infusion centre...
August 14, 2017: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/28806398/lysine-52-stabilizes-the-myc-oncoprotein-through-an-scf-fbxw7-independent-mechanism
#10
J De Melo, S S Kim, C Lourenco, L Z Penn
The oncogenic transcription factor c-MYC (MYC) is deregulated and often overexpressed in more than 50% of cancers. MYC deregulation is associated with poor prognosis and aggressive disease, suggesting that the development of therapeutic inhibitors targeting MYC would markedly impact patient outcome. MYC is highly regulated, with a protein and mRNA half-life of ~30 min. The most extensively studied pathway regulating MYC protein stability involves ubiquitylation and proteasomal degradation mediated by the E3-ligase, SCF(Fbxw7)...
August 14, 2017: Oncogene
https://www.readbyqxmd.com/read/28806397/mdm2-promotes-cdc25c-protein-degradation-and-delays-cell-cycle-progression-through-the-g2-m-phase
#11
L E Giono, L Resnick-Silverman, L A Carvajal, S St Clair, J J Manfredi
Upon different types of stress, the gene encoding the mitosis-promoting phosphatase Cdc25C is transcriptionally repressed by p53, contributing to p53's enforcement of a G2 cell cycle arrest. In addition, Cdc25C protein stability is also decreased following DNA damage. Mdm2, another p53 target gene, encodes a ubiquitin ligase that negatively regulates p53 levels by ubiquitination. Ablation of Mdm2 by siRNA led to an increase in p53 protein and repression of Cdc25C gene expression. However, Cdc25C protein levels were actually increased following Mdm2 depletion...
August 14, 2017: Oncogene
https://www.readbyqxmd.com/read/28805053/heterogeneous-photochemistry-of-agrochemicals-at-leaf-surface-a-case-study-of-plant-activator-acibenzolar-s-methyl
#12
Mohamad Sleiman, Pascal de Sainte Claire, Claire Richard
The photoreactivity of plant activator benzo-(1,2,3)-thiadiazole-7-carbothioic acid S-methyl ester (BTH) commonly named acibenzolar-S-methyl was studied on surfaces of glass, paraffinic wax films and apple leaves. Experiments were carried out in a solar simulator using pure and formulated BTH (BION®). Surface photoproducts were identified using liquid chromatography coupled with electrospray ionization and high resolution Orbitrap mass spectrometer, while volatile photoproducts were characterized using an online thermal desorption system coupled to gas chromatography-mass spectrometry (GC-MS)...
August 14, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28804517/update-on-the-role-of-nanoliposomal-irinotecan-in-the-treatment-of-metastatic-pancreatic-cancer
#13
REVIEW
Fnu Asad Ur Rahman, Saeed Ali, Muhammad Wasif Saif
Median survival for patients with metastatic pancreatic cancer (MPC) treated with combination chemotherapeutic agents such as gemcitabine-based regimens and FOLFIRINOX is currently less than 12 months. This highlights the need for more efficacious first-line, as well as second-line therapies. Nanoliposomal irinotecan, in combination with 5-fluorouracil (5-FU)/folinic acid has recently been assessed as second-line therapy after initial gemcitabine-based therapy. It is the first, second-line treatment approved by the US Food and Drug Administration to treat patients with MPC based on results of the NAnoliPOsomaL Irinotecan (NAPOLI-1) study, which showed that this regimen significantly prolonged progression-free survival (3...
July 2017: Therapeutic Advances in Gastroenterology
https://www.readbyqxmd.com/read/28803538/pharmacokinetics-of-tafamidis-a-transthyretin-amyloidosis-drug-in-rats
#14
Kyeong-Ryoon Lee, Jong-Woo Jeong, Hun-Chan Hyun, Jang Eunseo, Sunjoo Ahn Ahn, Sungwook Choi, Sang Hoon Joo, Sung-Sub Kim, Tae-Sung Koo
1. We characterized the pharmacokinetics of tafamidis, a novel drug to treat transthyretin-related amyloidosis, in rats after intravenous and oral administration at doses of 0.3-3 mg/kg. In vitro Caco-2 cell permeability and liver microsomal stability, as well as in vivo tissue distribution and plasma protein binding were also examined. 2. After intravenous injection, systemic clearance (CL), volumes of distribution at steady state (Vss), and half-life (T½) remained unaltered as a function of dose, with values in the ranges of 6...
August 14, 2017: Xenobiotica; the Fate of Foreign Compounds in Biological Systems
https://www.readbyqxmd.com/read/28803492/rifampin-vs-rifapentine-what-is-the-preferred-rifamycin-for-tuberculosis
#15
Omamah Alfarisi, Wael A Alghamdi, Mohammad H Al-Shaer, Kelly E Dooley, Charles A Peloquin
One-third of the world's population is infected with Mycobacterium tuberculosis (M.tb.). Latent tuberculosis infection (LTBI) can progress to tuberculosis disease, the leading cause of death by infection. Rifamycin antibiotics, like rifampin and rifapentine, have unique sterilizing activity against M.tb. What are the advantages of each for LTBI or tuberculosis treatment? Areas covered: We review studies assessing the pharmacokinetics (PK), pharmacodynamics (PD), drug interaction risk, safety, and efficacy of rifampin and rifapentine and provide basis for comparing them...
August 14, 2017: Expert Review of Clinical Pharmacology
https://www.readbyqxmd.com/read/28803000/interaction-of-niobium-with-iron-oxide-colloids-and-the-role-of-humic-acid
#16
Madhusudan Ghosh, K K Swain, Rakesh Verma
In this work, we report the sorption of Nb on iron oxides and the effect of humic acid. Iron oxides viz. goethite, hematite and magnetite were chemically synthesised and characterised by X-ray diffraction, particle size, surface area and zeta potential measurement. The sorption of Nb on all the three iron oxides was low (∼40%) at pH 1, increased to ∼ 90% at pH 8 and decreased marginally above pH 8. The effect of humic acid on the sorption was very small. Thermodynamic parameters viz. activation energy, enthalpy, entropy, free energy and sticking probability were calculated to understand the mechanism of the sorption process...
August 10, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28802259/cis-regulatory-elements-explain-most-of-the-mrna-stability-variation-across-genes-in-yeast
#17
Jun Cheng, Kerstin C Maier, Ziga Avsec, Petra Rus, Julien Gagneur
The stability of mRNA is one of the major determinants of gene expression. Although a wealth of sequence elements regulating mRNA stability has been described, their quantitative contributions to half-life are unknown. Here, we built a quantitative model for Saccharomyces cerevisiae based on functional mRNA sequence features that explains 59% of the half-life variation between genes and predicts half-life at a median relative error of 30%. The model revealed a new destabilizing 3'UTR motif, ATATTC, which we functionally validated...
August 11, 2017: RNA
https://www.readbyqxmd.com/read/28801829/cloning-and-characterization-of-halomonas-elongata-l-asparaginase-a-promising-chemotherapeutic-agent
#18
Ali Ghasemi, Sedigheh Asad, Mahboubeh Kabiri, Bahareh Dabirmanesh
L-asparaginase has been used in the treatment of patients with acute lymphoblastic leukemia (ALL) for more than 30 years. Rapid clearance of the enzyme from blood stream and its L-glutaminase-dependent neurotoxicity has led to searching for new L-asparaginases with more desirable properties. In the present study, L-asparaginase coding gene of Halomonas elongata was isolated, expressed in Escherichia coli, purified, and characterized. The purified protein was found to have a molecular mass of 39.5 kDa and 1000-folds more activity towards L-asparagine than L-glutamine...
August 11, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28800640/knockdown-of-the-plasmodium-falciparum-surfin4-1-antigen-leads-to-an-increase-of-its-cognate-transcript
#19
Tatiane Macedo-Silva, Rosana Beatriz Duque Araujo, Kamila Anna Meissner, Wesley Luzetti Fotoran, Márcia Melo Medeiros, Mauro Ferreira de Azevedo, Gerhard Wunderlich
The genome of the malaria parasite Plasmodium falciparum contains the surf gene family which encodes large transmembrane proteins of unknown function. While some surf alleles appear to be expressed in sexual stages, others occur in asexual blood stage forms and may be associated to virulence-associated processes and undergo transcriptional switching. We accessed the transcription of surf genes along multiple invasions by real time PCR. Based on the observation of persistent expression of gene surf4.1, we created a parasite line which expresses a conditionally destabilized SURFIN4...
2017: PloS One
https://www.readbyqxmd.com/read/28800538/characterization-of-the-metabolic-transformation-of-thiamethoxam-to-clothianidin-in-helicoverpa-armigera-larvae-by-spe-combined-uplc-ms-ms-and-its-relationship-with-the-toxicity-of-thiamethoxam-to-helicoverpa-armigera-larvae
#20
Yinjun Fan, Xueyan Shi
In order to characterize the metabolic transformation of thiamethoxam (TMX) to clothianidin (CLO) in Helicoverpa armigera larvae and clarify its relationship with the insecticidal toxicity of TMX, method for determination of TMX and its metabolite clothianidin (CLO) residues in H. armigera larvae by solid phase extraction (SPE) combined UPLC-MS/MS was established. Following acetonitrile extraction and purification by SPE on florisil cartridge and C18 cartridge sequently, and cleanup by PSA adsorption, TMX and CLO residues in H...
July 31, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
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