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https://www.readbyqxmd.com/read/28198919/natural-compounds-from-mexican-medicinal-plants-as-potential-drug-leads-for-anti-tuberculosis-drugs
#1
Rocio Gómez-Cansino, Silvia Laura Guzmán-Gutiérrez, María Guadalupe Campos-Lara, Clara Ines Espitia-Pinzón, Ricardo Reyes-Chilpa
In Mexican Traditional Medicine 187 plant species are used in the treatment of respiratory conditions that may be associated with tuberculosis. In this contribution, we review the ethnobotany, chemistry and pharmacology of 63 species whose extracts have been assayed for antimycobacterial activity in vitro. Among these, the most potent is Aristolochia brevipes (MIC= 12.5 µg/mL), followed by Aristolochia taliscana, Citrus sinensis, Chrysactinia mexicana, Persea americana, and Olea europaea (MIC<64 µg/mL)...
February 9, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28151970/establishing-a-reference-interval-for-serum-anti-dsdna-antibody-a-large-chinese-han-population-based-multi-center-study
#2
Chuiwen Deng, Shulan Zhang, Chaojun Hu, Ping Li, Ziyan Wu, Si Chen, Jing Li, Liubing Li, Fengchun Zhang, Yongzhe Li
BACKGROUND: A reference interval (RI) for the circulating concentration of anti-dsDNA antibody is essential for clinicians to interpret laboratory results and make clinical decisions. Therefore, we aimed to establish the RI for anti-dsDNA antibody in the Chinese Han population. METHODS: This study was designed and carried out in accordance with guideline C28-A3, which is proposed by the International Federation of Clinical Chemistry and the Clinical and Laboratory Standards Institute...
2017: PloS One
https://www.readbyqxmd.com/read/28135045/short-synthetic-%C3%AE-sheet-antimicrobial-peptides-for-the-treatment-of-multidrug-resistant-pseudomonas-aeruginosa-burn-wound-infections
#3
Guansheng Zhong, Junchi Cheng, Zhen Chang Liang, Liang Xu, Weiyang Lou, Chang Bao, Zhan Yuin Ong, Huihui Dong, Yi Yan Yang, Weimin Fan
Pseudomonas aeruginosa is often implicated in burn wound infections; its inherent drug resistance often renders these infections extremely challenging to treat. This is further compounded by the problem of emerging drug resistance and the dearth of novel antimicrobial drug discovery in recent years. In the perennial search for effective antimicrobial compounds, the authors identify short synthetic β-sheet folding peptides, IRIKIRIK (IK8L), IRIkIrIK (IK8-2D), and irikirik (IK8D) as prime candidates owing to their high potency against Gram-negative bacteria...
January 30, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28131940/controlled-release-of-silyl-ether-camptothecin-from-thiol-ene-click-chemistry-functionalized-mesoporous-silica-nanoparticles
#4
Yue Yan, Jie Fu, Tianfu Wang, Xiuyang Lu
: As efficient drug carriers, stimuli-responsive mesoporous silica nanoparticles are at the forefront of research on drug delivery systems. An acid-responsive system based on silyl ether has been applied to deliver a hybrid prodrug. Thiol-ene click chemistry has been successfully utilized for tethering this prodrug to mesoporous silica nanoparticles. Here, by altering the steric bulk of the substituent on the silicon atom, the release rate of a model drug, camptothecin, was controlled...
January 25, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28130001/dried-blood-spot-sampling-in-psychiatry-perspectives-for-improving-therapeutic-drug-monitoring
#5
REVIEW
Lisa C Martial, Rob E Aarnoutse, Martina Mulder, Arnt Schellekens, Roger J M Brüggemann, David M Burger, Aart H Schene, Albert Batalla
Assessment of drug concentrations is indicated to guide dosing of a selected number of drugs used in psychiatry. Conventionally this is done by vena puncture. Novel sampling strategies such as dried blood spot (DBS) sampling have been developed for various drugs, including antipsychotics, antidepressants and mood-stabilizers. DBS sampling is typically performed by means of a finger prick. This method allows for remote sampling, which means that patients are not required to travel to a health care facility. The number of DBS assays for drugs used in psychiatry has increased over the last decade and includes antidepressants (tricyclic and serotonin and/or norepinephrine reuptake inhibitors), mood stabilizers and first- and second-generation antipsychotics...
January 24, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28127872/quantitative-proteomics-of-breast-tumors-tissue-quality-assessment-to-clinical-biomarkers
#6
Yi Chen, David Britton, Elizabeth R Wood, Stephen Brantley, Anthony Magliocco, Ian Pike, John M Koomen
Liquid chromatography-selected reaction monitoring mass spectrometry (LC-SRM) is not only a proven tool for clinical chemistry, but also a versatile method to enhance the capability to quantify biomarkers for tumor biology research. As the treatment of cancer continues to evolve, the ability to assess multiple biomarkers to assign cancer phenotypes based on the genetic background and the signaling of the individual tumor becomes paramount to our ability to treat the patient. In breast cancer, the American Society of Clinical Oncology (ASCO) has defined biomarkers for patient assessment to guide selection of therapy: estrogen receptor, progesterone receptor, and the HER2/Neu receptor tyrosine kinase; therefore, these proteins were selected for LC-SRM assay development...
January 27, 2017: Proteomics
https://www.readbyqxmd.com/read/28120706/advanced-in-silico-approaches-for-drug-discovery-mining-information-from-multiple-biological-and-chemical-data-through-mtk-qsber-and-pt-qspr-strategies
#7
Alejandro Speck-Planche, Maria Natália Dias Soeiro Cordeiro
The last decade has been seeing an increase of public-private partnerships in drug discovery, mostly driven by factors such as the decline in productivity, the high costs, time, and resources needed, along with the requirements of regulatory agencies. In this context, traditional computer-aided drug discovery techniques have been playing an important role, enabling the identification of new molecular entities at early stages. However, recent advances in chemoinformatics and systems pharmacology, alongside with a growing body of high quality, publicly accessible medicinal chemistry data, have led to the emergence of novel in silico approaches...
January 24, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28097740/in%C3%A2-vivo-dearomatization-of-the-potent-antituberculosis-agent-btz043-via-meisenheimer-complex-formation
#8
Florian Kloss, Viktor Krchnak, Anna Krchnakova, Sebastian Schieferdecker, Julia Dreisbach, Volker Krone, Ute Möllmann, Michael Hoelscher, Marvin J Miller
Nitrobenzothiazinones are among the most potent antituberculosis agents. Herein, we disclose an unprecedented in vivo reduction process that affords Meisenheimer complexes of the clinical candidates BTZ043 and PBTZ169. The reduction is reversible, occurs in all mammalian species investigated, has a profound influence on the in vivo ADME characteristics, and has considerable implications for the design and implementation of clinical studies. The reduction was confirmed by chemical studies that enabled the complete characterization of the Meisenheimer complex and its subsequent chemistry...
January 18, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28094081/emerging-human-fetuin-a-assays-for-biomedical-diagnostics
#9
REVIEW
Sandeep Kumar Vashist, E Marion Schneider, A G Venkatesh, John H T Luong
Human fetuin A (HFA) plays a prominent pathophysiological role in numerous diseases and pathophysiological conditions with considerable biomedical significance; one example is the formation of calciprotein particles in osteoporosis and impaired calcium metabolisms. With impressive advances in in vitro diagnostic assays during the last decade, ELISAs have become a workhorse in routine clinical diagnostics. Recent diagnostic formats involve high-sensitivity immunoassay procedures, surface plasmon resonance, rapid immunoassay chemistries, signal enhancement, and smartphone detection...
January 13, 2017: Trends in Biotechnology
https://www.readbyqxmd.com/read/28074653/the-essential-medicinal-chemistry-of-curcumin
#10
Kathryn M Nelson, Jayme L Dahlin, Jonathan Bisson, James Graham, Guido F Pauli, Michael A Walters
Curcumin is a constituent (up to ∼5%) of the traditional medicine known as turmeric. Interest in the therapeutic use of turmeric and the relative ease of isolation of curcuminoids has led to their extensive investigation. Curcumin has recently been classified as both a PAINS (pan-assay interference compounds) and an IMPS (invalid metabolic panaceas) candidate. The likely false activity of curcumin in vitro and in vivo has resulted in >120 clinical trials of curcuminoids against several diseases. No double-blinded, placebo controlled clinical trial of curcumin has been successful...
January 11, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28068053/surface-modification-of-gold-nanoparticles-with-small-molecules-for-biochemical-analysis
#11
Yiping Chen, Yunlei Xianyu, Xingyu Jiang
As one of the major tools for and by chemical science, biochemical analysis is becoming increasingly important in fields like clinical diagnosis, food safety, environmental monitoring, and the development of chemistry and biochemistry. The advancement of nanotechnology boosts the development of analytical chemistry, particularly the nanoparticle (NP)-based approaches for biochemical assays. Functional NPs can greatly improve the performance of biochemical analysis because they can accelerate signal transduction, enhance the signal intensity, and enable convenient signal readout due to their unique physical and chemical properties...
January 9, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28054632/a-sensitive-three-monoclonal-antibodies-based-automatic-latex-particle-enhanced-turbidimetric-immunoassay-for-golgi-protein-73-detection
#12
Yanyan Xia, Han Shen, Yefei Zhu, Hongpan Xu, Zhiyang Li, Jin Si
Golgi protein 73 (GP73) is a novel and potential marker for diagnosing hepatocellular carcinoma (HCC) that has been found to be abnormally elevated in liver disease. A latex particle-enhanced turbidimetric immunoassay (LTIA) was recently introduced and licensed for application in a variety of automated clinical chemistry analyzers. However, no studies have reported sufficient data on analytical performance of this method when using 3 monoclonal antibodies for GP73 measurement. The experimental conditions were firstly optimized and range of linearity, diagnostic potential, clinical relevance were compared with the LTIA based on polyclonal antibodies and ELISA...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/27992181/multiparametric-assessment-of-gold-nanoparticle-cytotoxicity-in-cancerous-and-healthy-cells-the-role-of-size-shape-and-surface-chemistry
#13
Manjari Bhamidipati, Laura Fabris
In recent years, we and others have become interested in evaluating the use of surface-enhanced Raman scattering (SERS) tags for early cancer detection and in designing new approaches to demonstrate the applicability of this spectroscopic technique in the clinic. SERS-based imaging in particular offers ultra sensitivity up to the single molecule, multiplexing capability, and increased photostability and has been shown to outperform fluorescence. However, to employ SERS tags for early cancer detection, it is important to understand their interaction with cells and determine their cytotoxicity...
January 6, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/27978469/highly-sensitive-lc-ms-ms-methods-for-the-determination-of-seven-human-cyp450-activities-using-small-oral-doses-of-probe-drugs-in-human
#14
Alexia Grangeon, Sophie Gravel, Fleur Gaudette, Jacques Turgeon, Veronique Michaud
Cocktails composed of several Cytochrome P450 (CYP450)-selective probe drugs have been shown of value to characterize in vivo drug-metabolism activities. Our objective was to develop and validate highly sensitive and selective LC-MS/MS assays allowing the determination of seven major human CYP450 isoenzyme activities following administration of low oral doses of a modified CYP450 probe-drug cocktail in patients. The seven-drug cocktail was composed of caffeine, bupropion, tolbutamide, omeprazole, dextromethorphan, midazolam (all administered concomitantly) and chlorzoxazone (administered separately) to phenotype for CYP1A2, 2B6, 2C9, 2C19, 2D6, 3A4/5 and 2E1, respectively...
January 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/27916120/development-and-statistical-assessment-of-a-paper-based-immunoassay-for-detection-of-tumor-markers
#15
Thiago Mazzu-Nascimento, Giorgio Gianini Morbioli, Luis Aparecido Milan, Fabiana Cristina Donofrio, Carlos Alberto Mestriner, Emanuel Carrilho
Paper-based assays are an attractive low-cost option for clinical chemistry testing, due to characteristics such as short time of analysis, low consumption of samples and reagents, and high portability of assays. However, little attention has been given to the evaluation of the performance of these simple tests, which should include the use of a statistical approach to define the choice of best cut-off value for the test. The choice of the cut-off value impacts on the sensitivity and specificity of the bioassay...
January 15, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/27912126/evaluation-of-the-inactivation-effect-of-triton-x-100-on-ebola-virus-infectivity
#16
Francesca Colavita, Serena Quartu, Eleonora Lalle, Licia Bordi, Daniele Lapa, Silvia Meschi, Antonella Vulcano, Antonietta Toffoletti, Eugenio Bordi, Maria Grazia Paglia, Antonino Di Caro, Giuseppe Ippolito, Maria Rosaria Capobianchi, Concetta Castilletti
BACKGROUND: The recent Ebola virus disease outbreak occurred in West Africa since December 2013 highlighted the need of appropriate virus inactivation procedures to be set up to allow the necessary processing of specimens outside BSL-4 facilities and to perform laboratory tests without affecting clinical decisions. For this purpose, international guidelines suggest the pre-treatment of the samples with Triton X-100. OBJECTIVES: Due to the limited scientific evidence about the efficacy of Triton X-100 on enveloped-viruses, the aim of this work was to evaluate the effect of Triton X-100 on the virus infectivity and to establish the optimal conditions for its use...
January 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/27899562/the-chembl-database-in-2017
#17
Anna Gaulton, Anne Hersey, Michał Nowotka, A Patrícia Bento, Jon Chambers, David Mendez, Prudence Mutowo, Francis Atkinson, Louisa J Bellis, Elena Cibrián-Uhalte, Mark Davies, Nathan Dedman, Anneli Karlsson, María Paula Magariños, John P Overington, George Papadatos, Ines Smit, Andrew R Leach
ChEMBL is an open large-scale bioactivity database (https://www.ebi.ac.uk/chembl), previously described in the 2012 and 2014 Nucleic Acids Research Database Issues. Since then, alongside the continued extraction of data from the medicinal chemistry literature, new sources of bioactivity data have also been added to the database. These include: deposited data sets from neglected disease screening; crop protection data; drug metabolism and disposition data and bioactivity data from patents. A number of improvements and new features have also been incorporated...
January 4, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/27884478/vaccine-provision-delivering-sustained-widespread-use
#18
Scott Preiss, Nathalie Garçon, Anthony L Cunningham, Richard Strugnell, Leonard R Friedland
The administration of a vaccine to a recipient is the final step in a development and production process that may have begun several decades earlier. Here we describe the scale and complexity of the processes that brings a candidate vaccine through clinical development to the recipient. These challenges include ensuring vaccine quality (between 100 and 500 different Quality Control tests are performed during production to continually assess safety, potency and purity); making decisions about optimal vaccine presentation (pre-filled syringes versus multi-dose vials) that affect capacity and supply; and the importance of maintaining the vaccine cold chain (most vaccines have stringent storage temperature requirements necessary to maintain activity and potency)...
December 20, 2016: Vaccine
https://www.readbyqxmd.com/read/27872506/harmonising-adult-reference-intervals-in-australia-and-new-zealand-the-continuing-story
#19
REVIEW
Gus Koerbin, Jillian R Tate
Reference intervals (RIs) are used to help clinicians determine if a patient can be classified as being in a diseased or healthy state and there are often sound scientific and clinical reasons for differences in RIs. One of the current strategic priorities for the Australasian Association of Clinical Biochemists is to encourage and assist laboratories to achieve harmonisation of RIs for common clinical chemistry analytes where sound calibration and traceability are in place. This need is based on good laboratory practice, providing the clinician with results that allow appropriate and reliable clinical interpretation and progression further toward the national e-health framework and a single electronic health record...
August 2016: Clinical Biochemist. Reviews
https://www.readbyqxmd.com/read/27867948/supra-therapeutic-plasma-concentrations-of-haloperidol-induce-moderate-inhibition-of-lipopolysaccharide-induced-interleukin-8-release-in-human-monocytes
#20
Herbert Bosshart
BACKGROUND: The clinical use of antipsychotics and mood-stabilizing drugs with proven efficacy is largely determined by the occurrence of treatment-emergent adverse events and routine clinical chemistry and haematology data, which together define the safety and tolerability profile of these psychopharmaceuticals. Whereas the effects of mood-stabilizing drugs on functional properties of blood cells have been poorly investigated, the effects of antipsychotics have received more attention...
October 2016: Annals of Translational Medicine
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