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simultaneous drug detection

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https://www.readbyqxmd.com/read/28219799/uplc-ms-ms-method-for-the-simultaneous-quantification-of-three-new-antiretroviral-drugs-dolutegravir-elvitegravir-and-rilpivirine-and-other-thirteen-antiretroviral-agents-plus-cobicistat-and-ritonavir-boosters-in-human-plasma
#1
Marco Simiele, Alessandra Ariaudo, Amedeo De Nicolò, Fabio Favata, Martina Ferrante, Chiara Carcieri, Stefano Bonora, Giovanni Di Perri, Antonio De Avolio
Rilpivirine (RPV), dolutegravir (DTG) and elvitegravir (EVG) are the latest antiretroviral drugs approved for treatment of HIV infection. Currently, poor information is currently available concerning their pharmacokinetic and pharmacodynamic properties, thus making the use of therapeutic drug monitoring for these drugs not useful. This lack of information is partially due to the absence of an high-throughput method for their simultaneous quantification together with other antiretroviral drugs. In this work, we describe the development and validation of a new UPLC-MS/MS method to quantify these drugs, together with other fourteen antiretroviral agents, in human plasma...
February 3, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28216883/comparative-pharmacokinetic-profiles-of-three-protoberberine-type-alkaloids-from-raw-and-bile-processed-rhizoma-coptidis-in-heat-syndrome-rats
#2
Yuan Zi-Min, Chen Yue, Gao Hui, Lv Jia, Chen Gui-Rong, Jing Wang
BACKGROUND: The Bile-processed Rhizoma coptidis (BRC), which has a colder drug property than Rhizoma coptidis (RC), is widely used for the treatment of heat syndrome. We compared the pharmacokinetics of the protoberberine-type alkaloids in BRC and RC in rats with heat syndrome to elucidate the bile-processing mechanism. MATERIAL AND METHODS: We established a rapid and sensitive method for simultaneously determining three alkaloids: berberine, palmatine, and jatrorrhizine, in rat plasma based on ultra-performance liquid chromatography/tandem mass spectrometry...
January 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28215405/screening-of-over-100-drugs-in-horse-urine-using-automated-on-line-solid-phase-extraction-coupled-to-liquid-chromatography-high-resolution-mass-spectrometry-for-doping-control
#3
W H Kwok, Timmy L S Choi, Yeuki Y K Tsoi, Gary N W Leung, Terence S M Wan
A fast method for the direct analysis of enzyme-hydrolysed horse urine using an automated on-line solid-phase extraction (SPE) coupled to a liquid-chromatography/high resolution mass spectrometer was developed. Over 100 drugs of diverse drug classes could be simultaneously detected in horse urine at sub to low parts per billion levels. Urine sample was first hydrolysed by β-glucuronidase to release conjugated drugs, followed by centrifugal filtration. The filtrate (1mL) was directly injected into an on-line SPE system consisting of a pre-column filter and a SPE cartridge column for the separation of analytes from matrix components...
February 14, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28212319/a-validated-stability-indicating-hplc-method-for-simultaneous-determination-of-amoxicillin-and-enrofloxacin-combination-in-an-injectable-suspension
#4
Nidal Batrawi, Shorouq Wahdan, Fuad Al-Rimawi
The combination of amoxicillin and enrofloxacin is a well-known mixture of veterinary drugs; it is used for the treatment of Gram-positive and Gram-negative bacteria. In the scientific literature, there is no high-performance liquid chromatography (HPLC)-UV method for the simultaneous determination of this combination. The objective of this work is to develop and validate an HPLC method for the determination of this combination. In this regard, a new, simple and efficient reversed-phase HPLC method for simultaneous qualitative and quantitative determination of amoxicillin and enrofloxacin, in an injectable preparation with a mixture of inactive excipients, has been developed and validated...
February 16, 2017: Scientia Pharmaceutica
https://www.readbyqxmd.com/read/28208250/simultaneous-voltammetric-determination-of-acetaminophen-and-isoniazid-hepatotoxicity-related-drugs-utilizing-bismuth-oxide-nanorod-modified-screen-printed-electrochemical-sensing-platforms
#5
Bahaa G Mahmoud, Mohamed Khairy, Farouk A Rashwan, Craig E Banks
To overcome the recent outbreaks of hepatotoxicity-related drugs, a new analytical tool for the continuously determination of these drugs in human fluids is required. Electrochemical-based analytical methods offer an effective, rapid, and simple tool for on-site determination of various organic and inorganic species. However, the design of a sensitive, selective, stable, and reproducible sensor is still a major challenge. In the present manuscript, a facile, one-pot hydrothermal synthesis of bismuth oxide (Bi2O2...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28204826/pathway-deviation-based-biomarker-and-multi-effect-target-identification-in-asbestos-related-squamous-cell-carcinoma-of-the-lung
#6
Jiang Du, Lin Zhang
Asbestos-related lung carcinoma is one of the most devastating occupational cancers, and effective techniques for early diagnosis are still lacking. In the present study, a systematic approach was applied to detect a potential biomarker for asbestos-related lung cancer (ARLC); in particular asbestos-related squamous cell carcinoma (ARLC-SCC). Microarray data (GSE23822) were retrieved from the Gene Expression Omnibus database, including 26 ARLC-SCCs and 30 non-asbestos-related squamous cell lung carcinomas (NARLC-SCCs)...
March 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28199317/colorimetric-tests-for-diagnosis-of-filarial-infection-and-vector-surveillance-using-non-instrumented-nucleic-acid-loop-mediated-isothermal-amplification-nina-lamp
#7
Catherine B Poole, Zhiru Li, Andy Alhassan, Dylan Guelig, Steven Diesburg, Nathan A Tanner, Yinhua Zhang, Thomas C Evans, Paul LaBarre, Samuel Wanji, Robert A Burton, Clotilde K S Carlow
Accurate detection of filarial parasites in humans is essential for the implementation and evaluation of mass drug administration programs to control onchocerciasis and lymphatic filariasis. Determining the infection levels in vector populations is also important for assessing transmission, deciding when drug treatments may be terminated and for monitoring recrudescence. Immunological methods to detect infection in humans are available, however, cross-reactivity issues have been reported. Nucleic acid-based molecular assays offer high levels of specificity and sensitivity, and can be used to detect infection in both humans and vectors...
2017: PloS One
https://www.readbyqxmd.com/read/28196517/simultaneous-detection-of-bovine-and-porcine-dna-in-pharmaceutical-gelatin-capsules-by-duplex-pcr-assay-for-halal-authentication
#8
Jafar Nikzad, Soraya Shahhosseini, Maryam Tabarzad, Nastaran Nafissi-Varcheh, Maryam Torshabi
BACKGROUND: In the pharmaceutical industry, hard- and soft-shelled capsules are typically made from gelatin, commonly derived from bovine and porcine sources. To ensure that pharmaceutical products comply with halal regulations in Muslim countries (no porcine products allowed), development of a valid, reliable, quick, and most importantly, cost-effective tests are of utmost importance. METHODS: We developed a species-specific duplex polymerase chain reaction (PCR) assay targeting 149 bp porcine and 271 bp bovine mitochondrial DNA (mtDNA) to simultaneously detect both porcine and bovine DNA (in one reaction at the same time) in gelatin...
February 14, 2017: Daru: Journal of Faculty of Pharmacy, Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28193352/a-straightforward-validated-liquid-chromatography-coupled-to-tandem-mass-spectrometry-method-for-the-simultaneous-detection-of-nine-drugs-of-abuse-and-their-metabolites-in-hair-and-nails
#9
Delphine Cappelle, Mireille De Doncker, Celine Gys, Kamelia Krysiak, Steven De Keukeleire, Walid Maho, Cleo L Crunelle, Geert Dom, Adrian Covaci, Alexander L N van Nuijs, Hugo Neels
Hair and nails allow for a stable accumulation of compounds over time and retrospective investigation of past exposure and/or consumption. Owing to their long window of detection (weeks to months), analysis of these matrices can provide information complementary to blood and urine analysis or can be used in standalone when e.g. elimination from the body has already occurred. Drugs of abuse are often used together and, therefore, multi-analyte methods capable of detecting several substances and their metabolites in a single run are of importance...
April 1, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28192759/precise-simultaneous-quantification-of-methadone-and-cocaine-in-rat-serum-and-brain-tissue-samples-following-their-successive-i-p-administration
#10
David S Nakhla, Lobna A Hussein, N Magdy, Inas A Abdallah, Hazem E Hassan
A sensitive high-performance liquid chromatography (HPLC) assay with dual UV detection has been developed and validated for the simultaneous quantification of methadone and cocaine in rat serum and brain tissue samples. Liquid-liquid extraction using hexanes was applied for samples extraction with Levo-Tetrahydropalmatine (L-THP) as the internal standard. Chromatographic separation of the analytes was achieved on a reversed-phase Waters Symmetry(®) C18 column (150mm×4.6mm, 5μm). A gradient elution was employed with a mobile phase consisting of 5mM potassium phosphate containing 0...
February 7, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28185197/multiplex-immunohistochemistry-for-mapping-the-tumor-microenvironment
#11
Jessica Kalra, Jennifer Baker
Multiplex Immunohistochemistry (mIHC) allows for the simultaneous detection of multiple targets of interest in a single tissue section. Using this method it is therefore possible to evaluate several effectors of a signal transduction pathway at one time, co-localization of markers, or distribution of molecules relative to one another within tissues. This method plays an important role in characterizing molecular signaling and the outcome of signal ablation when assessing mechanisms of drug action. Additionally, this approach can be used to characterize: the tumor microenvironment including vascular architecture and hypoxia, cellular proliferation, cell death as well as drug distribution...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28178374/simultaneous-densitometric-determination-of-anthelmintic-drug-albendazole-and-its-metabolite-albendazole-sulfoxide-by-hptlc-in-human-plasma-and-pharmaceutical-formulations
#12
Jui J Pandya, Mallika Sanyal, Pranav S Shrivastav
A new, simple, accurate and precise high-performance thin layer chromatographic method has been developed and validated for simultaneous determination of an anthelmintic drug, albendazole and its active metabolite albendazole sulfoxide. Planar chromatographic separation was performed on aluminium-backed layer of silica gel 60G F254 using a mixture of toluene- acetonitrile-glacial acetic acid (7.0: 2.9: 0.1, v/v/v) as the mobile phase. For quantitation, the separated spots were scanned densitometrically at 225 nm...
February 8, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28178366/the-simultaneous-uplc-ms-ms-determination-of-emerging-drug-combination-candesartan-and-chlorthalidone-in-human-plasma-and-its-application
#13
Bhargav Patel, Arvind G Jangid, B N Suhagia, Nirmal Desai
A novel, precise, sensitive and accurate ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method has been developed for the simultaneous determination of novel drug combination, candesartan (CAN) and chlorthalidone (CHL) in human plasma. Chromatographic separation was achieved on Waters Acquity UPLC BEH C18 (50 mm × 2.1 mm, 1.7 µm). Mobile phase consisting of 1 mM Ammonium acetate in water: acetonitrile (20:80 v/v) was used. The total chromatographic runtime was 1...
February 8, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28168948/a-validated-hplc-method-for-simultaneous-determination-of-perindopril-arginine-amlodipine-and-indapamide-application-in-bulk-and-in-different-pharmaceutical-dosage-forms
#14
Ramzia I El-Bagary, Ehab F Elkady, Shereen Mowaka, Maria A Attallah
A simple, accurate, and precise LC method with a reversed stationary phase was developed and validated for the determination of perindopril (PER) arginine, amlodipine (AML), and indapamide (IND) alone and in binary mixtures (PER arginine is found in two dosage forms, i.e., with either AML or IND). Chromatographic separation was carried out on a BDS Hypersil<sup>®</sup> C18 column (100 × 3 mm, 5 μm). The mobile phase, consisting of 0.05 M potassium dihydrogen phosphate buffer (pH 2.6)-methanol(50 + 50, v/v), was pumped through the column whose temperature was maintained at 50°C at a flow rate of 0...
February 7, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28168082/simultaneous-determination-of-dexamethasone-ondansetron-granisetron-tropisetron-and-azasetron-in-infusion-samples-by-hplc-with-dad-detection
#15
Fu-Chao Chen, Lin-Hai Wang, Jun Guo, Xiao-Ya Shi, Bao-Xia Fang
A simple and rapid high-performance liquid chromatography with diode array detector (HPLC-DAD) method has been developed and validated for simultaneous quantification of five antiemetic agents in infusion samples: dexamethasone, ondansetron, granisetron, tropisetron, and azasetron. The chromatographic separation was achieved on a Phenomenex C18 column (4.6 mm × 150 mm, 5 μm) using acetonitrile-50 mM KH2PO4 buffer-triethylamine (25 : 74 : 1; v/v; pH 4.0). Flow rate was 1.0 mL/min with a column temperature of 30°C...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/28165092/probing-the-surface-chemistry-of-self-assembled-peptide-hydrogels-using-solution-state-nmr-spectroscopy
#16
Matthew Wallace, Jonathan A Iggo, Dave J Adams
The surface chemistry of self-assembled hydrogel fibres - their charge, hydrophobicity and ion-binding dynamics - is recognised to play an important role in determining how the gels develop as well as their suitability for different applications. However, to date there are no established methodologies for the study of this surface chemistry. Here, we demonstrate how solution-state NMR spectroscopy can be employed to measure the surface chemical properties of the fibres in a range of hydrogels formed from N-functionalised dipeptides, an effective and versatile class of gelator that has attracted much attention...
February 6, 2017: Soft Matter
https://www.readbyqxmd.com/read/28149264/serum-insulin-like-growth-factor-i-quantitation-by-mass-spectrometry-insights-for-protein-quantitation-with-this-technology
#17
Richard Kin Ting Kam, Chung Shun Ho, Michael Ho Ming Chan
Liquid chromatography mass spectrometry (LC-MS) is a widely used technique in the clinical laboratory, especially for small molecule quantitation in biological specimens, for example, steroid hormones and therapeutic drugs. Analysis of circulating macromolecules, including proteins and peptides, is largely dominated by traditional enzymatic, spectrophotometric, or immunological assays in clinical laboratories. However, these methodologies are known to be subjected to interfering substances, for example heterophilic antibodies, as well as subjected to non-specificity issues...
December 2016: EJIFCC
https://www.readbyqxmd.com/read/28147306/rapid-determination-of-30-bioactive-constituents-in-xuebijing-injection-using-ultra-high-performance-liquid-chromatography-high-resolution-hybrid-quadrupole-orbitrap-mass-spectrometry-coupled-with-principal-component-analysis
#18
Lihua Zuo, Zhi Sun, Yurong Hu, Ya Sun, Wenhua Xue, Lin Zhou, Jun Zhang, Xiaoyue Bao, Zhenfeng Zhu, Guanglu Suo, Xiaojian Zhang
Xuebijing injection (XBJ) is a traditional Chinese herbal prescription widely used in the treatment of sepsis. Extensive chemical studies revealed that XBJ injection contains amino acids, phenolic acids, flavonoid glycosides, terpeneglycosides and phthalides. In this study, the applicability of ultra high performance liquid chromatography coupled with high resolution hybrid quadruple-orbitrap mass spectrometry (UHPLC-Q-Orbitrap MS) for the simultaneous quantitative analysis of 30 bioactive constituents in XueBiJing injection (XBJ) was investigated...
January 12, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28137656/simultaneous-determination-of-rifabutin-and-human-serum-albumin-in-pharmaceutical-formulations-by-capillary-electrophoresis
#19
Yu Ermolenko, A Anshakova, N Osipova, M Kamentsev, O Maksimenko, V Balabanyan, S Gelperina
Capillary zone electrophoresis (CZE) was used for determination of rifabutin (RFB), an anti-tuberculosis antibiotic drug, in various pharmaceutical formulations. Apart from that, simultaneous determination of RFB and human serum albumin (HSA) was performed. Electrophoretic behaviour of RFB was examined at various pH levels. CE conditions: a quartz capillary tube (internal diameter 75mm, effective length 50cm, total length 60cm), the capillary temperature was 25°С, the voltage applied to the capillary tube was +20kV, the UV detection wavelength was 214nm, hydrodynamic injection of the sample was performed at 30mbar for 5s, tetraborate buffer solution (0...
January 27, 2017: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/28137509/plasmid-borne-carbapenem-hydrolyzing-class-d-%C3%AE-lactamases-chdls-and-adeabc-efflux-pump-conferring-carbapenem-tigecycline-resistance-among-acinetobacter-baumannii-isolates-harboring-tnabars
#20
Mohammad Savari, Alireza Ekrami, Saeed Shoja, Abbas Bahador
Here we studied the prevalence and mechanisms of simultaneous resistance to carbapenem and tigecycline and accumulation of resistance determinants reservoirs in genome of Acinetobacter baumannii (A. baumannii) clinical isolates. Susceptibility of the isolates were measured to 18 antimicrobial agents. Genetic diversity of the microbial population was determined using the International Clonal lineage typing (IC typing), multiple locus VNTR analysis (MLVA) and plasmid profiling methods. To detect the AbaRs, Carbapenem-Hydrolyzing Class D β-Lactamases (CHDLs) genes, AdeABC efflux pump genes and resistance determinants, PCR was used...
January 27, 2017: Microbial Pathogenesis
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