keyword
MENU ▼
Read by QxMD icon Read
search

simultaneous drug detection

keyword
https://www.readbyqxmd.com/read/28107984/development-and-validation-of-a-fast-micro-extraction-by-packed-sorbent-uhplc-pda-method-for-the-simultaneous-determination-of-linezolid-and-ciprofloxacin-in-human-plasma-from-patients-with-hospital-acquired-pneumonia
#1
Vincenzo Ferrone, Maura Carlucci, Roberto Cotellese, Paolo Raimondi, Annadomenica Cichella, Lorenzo Di Marco, Giuseppe Carlucci
An ultra high-performance liquid chromatographic (UHPLC) method with PDA detection was developed and validated for the simultaneous quantification of linezolid and ciprofloxacin in human plasma and applied in hospital acquired pneumonia patients (HAP). The method uses a semi-automated microextraction by packed sorbent for sample preparation. All parameters in the extraction step (pH, sample volume, sample dilution and number of aspiration - ejection cycles) and in the desorption step (percentage of acetonitrile in the solvent of elution and number of aspirations of elution solvent through the device) were statistically significant when the recovery was used as response...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28107979/electrochemical-sensing-platform-based-on-molecularly-imprinted-polymer-decorated-n-s-co-doped-activated-graphene-for-ultrasensitive-and-selective-determination-of-cyclophosphamide
#2
Bintong Huang, Lili Xiao, Haifeng Dong, Xueji Zhang, Wei Gan, Shahid Mahboob, Khalid Abdullah Al-Ghanim, Qunhui Yuan, Yingchun Li
A novel electrochemical sensor has been facilely fabricated by applying composite elements consisting of nitrogen and sulfur co-doped activated graphene (N,S-AGR) and molecularly imprinted polymer (MIP). N,S-AGR was synthesized by one-pot pyrogenation of a mixture of thiourea, KOH and graphene oxide, which was introduced to improve electron transfer capability and surface area of the electrode, while the electro-polymerized MIP layer afforded simultaneous recognition and quantification of cyclophosphamide (CPA) by utilizing Fe(CN)6(3-/4-) as probe to indicate electrical signals...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28107831/high-throughput-untargeted-screening-of-veterinary-drug-residues-and-metabolites-in-tilapia-using-high-resolution-orbitrap-mass-spectrometry
#3
Wei Jia, Xiaogang Chu, James Chang, Perry G Wang, Ying Chen, Feng Zhang
An analytical method was developed and validated for simultaneous analysis of one hundred and thirty-seven veterinary drug residues and metabolites from sixteen different classes in tilapia utilizing an improved fully non-targeted way of data acquisition with fragmentation. The automated on-line extraction procedure was achieved in a simple disposable pipet extraction. Ultrahigh-performance liquid chromatography and electrospray ionization quadrupole Orbitrap high-resolution mass spectrometry (UHPLC Q-Orbitrap) was used for the separation and detection of all the analytes...
March 8, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28105975/simultaneous-determination-of-first-line-4-fdc-antituberculosis-drugs-by-uhplc-uv-and-hplc-uv-a-comparative-study
#4
Pedro H C Franco, Paula R Chellini, Marcone A L Oliveira, Gerson A Pianetti
Tuberculosis is the second most deadly infectiousdisease, surpassed only by HIV/AIDS, and hasresulted in over 1 billion deaths in the last200 years. The World Health Organization estimatesthat in 2014, 9.6 million people were infected bythis disease and 1.5 million had died. First-choicetreatment consists of fixed-dose combinationtablets containing rifampicin, isoniazid,pyrazinamide, and ethambutol hydrochloride(4-FDC). There are pharmacopeial protocolsavailable to test 4-FDC, but they are prolonged,two-step methods...
January 19, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28101128/simultaneous-determination-of-newly-developed-antiviral-agents-in-pharmaceutical-formulations-by-hplc-dad
#5
Nourah Zoman Al-Zoman, Hadir Mohamed Maher, Amal Al-Subaie
BACKGROUND: Ombitasvir/paritaprevir/ritonavir/dasabuvir (Viekira Pak(®)) are the newest medicines approved for use in the treatment of hepatitis C virus (HCV) and are available in tablet form as an oral combination. Specifically, these agents are indicated in the treatment of HCV in patients with genotype 1 infection. Due to the therapeutic importance and increased use of Viekira Pak, proper methods for its determination in bulk and pharmaceutical formulations must be developed. RESULTS: The present study describes the development and validation of a simple, rapid, selective and economical reverse phase high performance liquid chromatography-diode array detection (HPLC-DAD) method for the simultaneous determination of paritaprevir (PAR), ombitasvir (OMB), dasabuvir(DAS) and ritonavir (RIT) in bulk and pharmaceutical preparations...
2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/28092163/corrigendum-to-simultaneous-orthogonal-drug-detection-using-fully-integrated-gas-chromatography-with-fourier-transform-infrared-detection-and-mass-spectrometric-detection
#6
(no author information available yet)
No abstract text is available yet for this article.
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28088043/hplc-uv-method-for-simultaneous-determination-of-mk-1775-and-azd-7762-in-both-acetonitrile-aqueous-solution-and-mouse-plasma
#7
REVIEW
Kareem Ebeid, Giang N Ho, Aliasger K Salem
A sensitive and precise method is described for the simultaneous determination of two small molecule kinase inhibitors: MK-1775 (MK) and AZD-7762 (AZD), in acetonitrile (ACN)-aqueous solution and in mouse plasma. A Nova-Pak C18 reversed phase column (3.9mm×150mm, 4μm, 60Å) was utilized in the separation using an isocratic mobile phase of 0.1% v/v triethylamine in phosphate buffer (pH=7.4): acetonitrile (ACN) (60:40, v/v), at a flow rate of 0.8mL/min. Detection wavelength was set at 310nm for both MK and AZD, and 431nm for the internal standard sunitinib (SUN)...
December 30, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28087374/what-stoichiometries-determined-by-mass-spectrometry-reveal-about-the-ligand-binding-mode-to-g-quadruplex-nucleic-acids
#8
Michael J Lecours, Adrien Marchand, Ahdia Anwar, Corinne Guetta, W Scott Hopkins, Valérie Gabelica
G-quadruplexes (G4s) have become important drug targets to regulate gene expression and telomere maintenance. Many studies on G4 ligand binding focus on determining the ligand binding affinities and selectivities. Ligands, however, can also affect the G4 conformation. Here we explain how to use electrospray ionization mass spectrometry (ESI-MS) to monitor simultaneously ligand binding and cation binding stoichiometries. The changes in potassium binding stoichiometry upon ligand binding hint at ligand-induced conformational changes involving a modification of the number of G-quartets...
January 10, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28074742/development-and-validation-of-an-rp-hplc-method-for-the-determination-of-vinpocetine-and-folic-acid-in-the-presence-of-a-vinpocetine-alkaline-degradation-product-in-bulk-and-in-capsule-form
#9
Ehab F Elkady, Marwa H Tammam, Ayman A Mohamed
An alkaline-forced degradation hydrolytic product of vinpocetine was prepared and characterized by <sup>1</sup>H-NMR, FTIR spectroscopy, and MS. Subsequently, a simple, selective, and validated reversed-phase HPLC method was developed for the simultaneous estimation of vinpocetine and folic acid in the presence of a vinpocetine alkaline degradation product. Chromatographic separation was achieved using an isocratic mobile phase consisting of acetonitrile-0.02 M KH<sub>2</sub>PO<sub>4</sub> [containing 0...
January 11, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28074431/detection-and-specific-elimination-of-egfr-ovarian-cancer-cells-using-a-near-infrared-photoimmunotheranostic-approach
#10
Dirk Bauerschlag, Ivo Meinhold-Heerlein, Nicolai Maass, Andreas Bleilevens, Karen Bräutigam, Wa'el Al Rawashdeh, Stefano Di Fiore, Anke Maria Haugg, Felix Gremse, Julia Steitz, Rainer Fischer, Elmar Stickeler, Stefan Barth, Ahmad Fawzi Hussain
PURPOSE: Targeted theranostics is an alternative strategy in cancer management that aims to improve cancer detection and treatment simultaneously. This approach combines potent therapeutic and diagnostic agents with the specificity of different cell receptor ligands in one product. The success of antibody drug conjugates (ADCs) in clinical practice has encouraged the development of antibody theranostics conjugates (ATCs). However, the generation of homogeneous and pharmaceutically-acceptable ATCs remains a major challenge...
January 10, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28073073/development-and-validation-of-a-liquid-chromatography-ms-ms-method-for-simultaneous-quantification-of-tenofovir-and-efavirenz-in-biological-tissues-and-fluids
#11
Luisa Barreiros, Cassilda Cunha-Reis, Eduarda M P Silva, Joana R B Carvalho, José das Neves, Bruno Sarmento, Marcela A Segundo
Millions of people worldwide live with human immunodeficiency virus (HIV) infection thus justifying the continuous search for new prevention and treatment strategies, including topical microbicide products combining antiretroviral drugs (ARVs) such as tenofovir (TFV) and efavirenz (EFV). Therefore, the aim of this work was to develop and validate a high performance liquid chromatography method coupled to triple quadrupole-tandem mass spectrometry (HPLC-MS/MS) for the quantification of TFV and EFV in biological matrices (mouse vaginal tissue, vaginal lavage and blood plasma)...
December 27, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28070717/identification-of-new-synthetic-cannabinoid-adb-chminaca-mab-chminaca-metabolites-in-human-hepatocytes
#12
Jeremy Carlier, Xingxing Diao, Cristina Sempio, Marilyn A Huestis
ADB-CHMINACA (MAB-CHMINACA) is a new synthetic cannabinoid with high potency and many reported adverse events and fatalities. The drug is currently scheduled in several countries in Europe and the USA. Analytical methods need to be developed to confirm ADB-CHMINACA intake for clinical and forensic programs. For many synthetic cannabinoids, parent compound is not detectable in biological samples after intake, making the detection of metabolites the only way to prove consumption. Therefore, detection of ADB-CHMINACA metabolites in biological specimens is critical...
January 9, 2017: AAPS Journal
https://www.readbyqxmd.com/read/28065596/a-strategy-to-combine-sample-multiplexing-with-targeted-proteomics-assays-for-high-throughput-protein-signature-characterization
#13
Brian K Erickson, Christopher M Rose, Craig R Braun, Alison R Erickson, Jeffrey Knott, Graeme C McAlister, Martin Wühr, Joao A Paulo, Robert A Everley, Steven P Gygi
Targeted mass spectrometry assays for protein quantitation monitor peptide surrogates, which are easily multiplexed to target many peptides in a single assay. However, these assays have generally not taken advantage of sample multiplexing, which allows up to ten analyses to occur in parallel. We present a two-dimensional multiplexing workflow that utilizes synthetic peptides for each protein to prompt the simultaneous quantification of >100 peptides from up to ten mixed sample conditions. We demonstrate that targeted analysis of unfractionated lysates (2 hr) accurately reproduces the quantification of fractionated lysates (72 hr analysis) while obviating the need for peptide detection prior to quantification...
January 19, 2017: Molecular Cell
https://www.readbyqxmd.com/read/28064506/simultaneous-analysis-of-3-mcpd-and-1-3-dcp-in-asian-style-sauces-using-quechers-extraction-and-gas-chromatography-triple-quadrupole-mass-spectrometry
#14
Susan Genualdi, Patricia Nyman, Lowri DeJager
Acid hydrolyzed vegetable protein (aHVP) is used for flavoring a wide variety of foods and also in the production of nonfermented soy sauce. During the production of aHVP, chloropropanols including 3-monochloropropane-1,2-diol (3-MCPD) and 1,3 dichloropropane-2-ol (1,3-DCP) can be formed through the reaction of the hydrochloric acid catalyst and residual fat and the reaction of 3-MCPD with acetic acid, respectively. 3-MCPD is a carcinogen, and 1,3-DCP has been classified as a genotoxic carcinogen. The European Union (EU) has set a maximum concentration of 0...
January 20, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28064354/can-systematic-reviews-contribute-to-regulatory-decisions
#15
REVIEW
Corrado Barbui, Antonio Addis, Laura Amato, Giuseppe Traversa, Silvio Garattini
INTRODUCTION: The new call on independent research on drugs issued in October 2016 by the Italian Medicines Agency (AIFA) explicitly reported that proposals based on systematic reviews were not admissible, and no justification or explanation for this choice was given. Prompted by this policy decision, here, we briefly discuss the potential usefulness of systematic reviews in responding to regulatory needs. First, systematic reviews, by collecting, analysing and critically appraising all relevant studies on a specific topic, may be used by different stakeholders as a basis for making clinical and policy recommendations, including regulatory recommendations...
January 7, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28059955/diagnosis-of-opportunistic-infections-hiv-co-infections-tuberculosis
#16
Lesley Scott, Pedro da Silva, Catharina C Boehme, Wendy Stevens, Chris Gilpin
PURPOSE OF REVIEW: Tuberculosis (TB) incidence has declined ∼1.5% annually since 2000, but continued to affect 10.4 million individuals in 2015, with 1/3 remaining undiagnosed or underreported. The diagnosis of TB among those co-infected with HIV is challenging as TB remains the leading cause of death in such individuals. Accurate and rapid diagnosis of active TB will avert mortality in both adults and children, reduce transmission, and assist in timeous decisions for antiretroviral therapy initiation...
January 5, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28058761/d-optimal-mixture-design-optimization-of-a-hplc-method-for-simultaneous-determination-of-commonly-used-antihistaminic-parent-molecules-and-their-active-metabolites-in-human-serum-and-urine
#17
Selvakumar Kanthiah, Kannappan Valliappan
This present study describes a specific, precise, sensitive and accurate method for simultaneous determination of hydroxyzine, loratadine, terfenadine, rupatadine and their main active metabolites cetirizine, desloratadine and fexofenadine in serum and urine by using meclizine as an internal standard. Solid phase extraction method for sample clean-up and preconcentration of analytes was carried out by using Phenomenex Strata-X-C and Strata X polymeric cartridges. Chromatographic analysis was performed on a Phenomenex cyano (150 mm x 4...
January 6, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28053211/optical-screening-for-rapid-antimicrobial-susceptibility-testing-and-for-observation-of-phenotypic-diversity-among-the-genetically-clonal-species-bacillus-anthracis
#18
Heather P McLaughlin, Amy S Gargis, Pierre Michel, David Sue, Linda M Weigel
: During high-impact events involving Bacillus anthracis, such as the Amerithrax incident of 2001 or the anthrax outbreaks in Russia and Sweden in 2016, critical decisions to reduce morbidity and mortality include rapid selection and distribution of effective antimicrobial agents for treatment and post-exposure prophylaxis. Detection of antimicrobial resistance currently relies on a conventional broth microdilution (BMD) method that requires a 16 - 20 hour incubation time for B. anthracis Advances in high-resolution optical screening offer a new technology to more rapidly evaluate antimicrobial susceptibility and to simultaneously assess growth characteristics of an isolate...
January 4, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28053070/automated-microsampling-technologies-and-enhancements-in-the-3rs
#19
L David Hopper
Data collected in vivo is essential for advising decisions on drug screening and development and basic research, and animal models are used extensively for acquiring experimental measurements. Traditionally, collection of specimens has been invasive, stressful to animal subjects, labor intensive, time-consuming and costly, and required many animals when using small models with low fluid volumes, such as rats or mice. Utilizing automated microsampling (AMS) alone or in an integrative pharmacology approach to evaluate multiple physiological, pharmacokinetic, and pharmacodynamic endpoints simultaneously in the same animal accomplishes multiple experimental goals...
December 2016: ILAR Journal
https://www.readbyqxmd.com/read/28046094/analysis-of-genetic-variation-in-cyp450-genes-for-clinical-implementation
#20
Liuh Ling Goh, Chia Wei Lim, Wey Cheng Sim, Li Xian Toh, Khai Pang Leong
BACKGROUND: Genetic determinants of drug response remain stable throughout life and offer great promise to patient-tailored drug therapy. The adoption of pharmacogenetic (PGx) testing in patient care requires accurate, cost effective and rapid genotyping with clear guidance on the use of the results. Hence, we evaluated a 32 SNPs panel for implementing PGx testing in clinical laboratories. METHODS: We designed a 32-SNP panel for PGx testing in clinical laboratories...
2017: PloS One
keyword
keyword
101237
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"