keyword
MENU ▼
Read by QxMD icon Read
search

Tandem

keyword
https://www.readbyqxmd.com/read/29454264/development-and-validation-of-uplc-ms-ms-assay-for-quantification-of-cladrin-absolute-bioavailability-and-dose-proportionality-study-in-rats
#1
Mamunur Rashid, Sandeep K Singh, Mohd Yaseen Malik, Sadaf Jahan, Swati Chaturvedi, Isha Taneja, Kanumuri Sivarama Raju, Zaiba Naseem, J R Gayen, Muhammad Wahajuddin
Cladrin, an isoflavone is a major bioactive constituent found in stem bark of Butea monosperma with remarkable osteogenic activity. A speedy and sensitive UPLC coupled tandem mass spectrometry (UPLC-MS/MS) method was developed, validated and successfully applied to bioavailability, blood partitioning, plasma protein binding, intravenous and multiple-dose oral pharmacokinetics of cladrin in rats. Separation was done on C18 column (5.0 μm, 4.6 × 50 mm) using mobile phase containing acetonitrile and 0.10% formic acid in the ratio of 65:35 (v/v) with 0...
January 31, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29453811/multimodal-treatment-including-tandem-high-dose-chemotherapy-and-autologous-stem-cell-transplantation-in-children-with-anaplastic-ependymomas
#2
Ji Won Lee, Do Hoon Lim, Ki Woong Sung, Hyeong Jin Lee, Eun Sang Yi, Keon Hee Yoo, Hong Hoe Koo, Yeon-Lim Suh, Hyung Jin Shin
In this study, we evaluated the results of multimodal treatment that included tandem HDCT/auto-SCT in children with anaplastic ependymomas. Fourteen patients with anaplastic ependymomas were enrolled from 2006 to 2014. Six cycles of induction chemotherapy were administered to all patients before they underwent tandem HDCT/auto-SCT. Patients who were older than 3 years of age were administered RT after two cycles of induction chemotherapy. In patients under 3 years of age, RT was either omitted or delayed until they reached 3 years of age, if the patients experienced CR after tandem HDCT/auto-SCT...
February 16, 2018: Pediatric Transplantation
https://www.readbyqxmd.com/read/29453775/effect-of-pparg-on-ages-induced-akt-mtor-signaling-associated-human-chondrocytes-autophagy
#3
Zhao-Jun Wang, Hai-Bin Zhang, Cheng Chen, Hao Huang, Jian-Xia Liang
Accumulation of advanced glycation end products (AGEs) in articular cartilage is thought to represent a major risk factor for osteoarthritis development. In this study we aimed to probe the role of AGEs in human chondrocytes and to determine the impact of the peroxisome proliferator-activated receptor-γ (PPARG) on AGEs-induced cell autophagy. Cell viability was measured after human chondrocytes were treated with different concentrations of AGEs with or without the PPARG inhibitor, T0070907, or agonist, pioglitazone...
February 17, 2018: Cell Biology International
https://www.readbyqxmd.com/read/29453495/comparison-of-concentrations-of-drugs-between-blood-samples-with-and-without-fluoride-additive-important-findings-for-%C3%AE-9-tetrahydrocannabinol-and-amphetamine
#4
Christopher Wiedfeld, Julia Krueger, Gisela Skopp, Frank Musshoff
Fluoride is a common stabilizing agent in forensic toxicology to avoid the frequent problem of degradation of drugs in blood samples especially described for cocaine. In cases only samples with addition of fluoride are available, it is a crucial question if also concentrations of common drugs other than cocaine (amphetamines, opiates and cannabinoids) are affected by fluoride. So far, there are only rare literature data available on discrepant results especially for Δ 9 -tetrahydrocannabinol (THC). In this study, comparative analysis of positive tested paired routine plasma/serum samples (n = 375), collected at the same time point (one device with and one without fluoride), was carried out with special focus on cannabinoids...
February 17, 2018: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/29453202/management-of-endocrine-disease-hyperandrogenic-states-in-women-pitfalls-in-laboratory-diagnosis
#5
Michel Pugeat, Ingrid Plotton, Aude Brac de la Perrière, Gerald Raverot, Henri Déchaud, Véronique Raverot
Measuring total testosterone level is the first-line approach in assessing androgen excess in women. The main pitfalls in measuring testosterone relate to its low concentration and to the structural similarity between circulating androgens and testosterone, requiring accurate techniques with high specificity and sensitivity. These goals can be achieved by immunoassay using a specific anti-testosterone monoclonal antibody, ideally after an extraction step. Liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) will be commonly used for measuring testosterone, providing optimal accuracy with a low limit of detection...
February 16, 2018: European Journal of Endocrinology
https://www.readbyqxmd.com/read/29453120/mycobiota-and-co-occurrence-of-mycotoxins-in-south-african-maize-based-opaque-beer
#6
Ifeoluwa Adekoya, Adewale Obadina, Cynthia Chilaka Adaku, Marthe De Boevre, Sheila Okoth, Sarah De Saeger, Patrick Njobeh
Beer, a beverage consumed throughout the world, is mainly derived from cereals. In this study, fungal and mycotoxin contamination, as well as the physicochemical properties of maize-based opaque beer (umqombothi) obtained from the Gauteng province of South Africa, was investigated. The mean water activity, pH and total titratable acidity of the analysed beer samples were 0.91, 3.76 and 1.20% lactic acid, respectively. The investigation revealed Aspergillus, Penicillium, Phoma and Saccharomyces as the predominant fungal genera with a mean fungal load of 3...
February 9, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29453054/determining-the-number-of-contributors-to-dna-mixtures-in-the-low-template-regime-exploring-the-impacts-of-sampling-and-detection-effects
#7
Sarah Norsworthy, Desmond S Lun, Catherine M Grgicak
The interpretation of DNA evidence may rely upon the assumption that the forensic short tandem repeat (STR) profile is composed of multiple genotypes, or partial genotypes, originating from n contributors. In cases where the number of contributors (NOC) is in dispute, it may be justifiable to compute likelihood ratios that utilize different NOC parameters in the numerator and denominator, or present different likelihoods separately. Therefore, in this work, we evaluate the impact of allele dropout on estimating the NOC for simulated mixtures with up to six contributors in the presence or absence of a major contributor...
February 8, 2018: Legal Medicine
https://www.readbyqxmd.com/read/29453015/metabolomic-profiling-of-campylobacter-jejuni-with-resistance-gene-ermb-by-ultra-high-performance-liquid-chromatography-quadrupole-time-of-flight-mass-spectrometry-and-tandem-quadrupole-mass-spectrometry
#8
Qin Fu, Dejun Liu, Yingyu Wang, Xiaowei Li, Lina Wang, Fugen Yu, Jianzhong Shen, Xi Xia
The metabolome changes of Campylobacter jejuni with resistant gene ermB remain unclear. Here, we described an untargeted metabolomic workflow based on ultra-high performance liquid chromatography-quadrupole time-of-flight mass spectrometry to investigate the metabolites perturbations mediated by ermB in C. jejuni. After optimization of extractants and chromatographic conditions, the combination of 100% methanol extraction with a 12 min gradient by C18 column was adopted for untargeted metabolomic profiling in reversed phase separation...
February 10, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29453008/forensic-image-analysis-cctv-distortion-and-artefacts
#9
REVIEW
Dilan Seckiner, Xanthé Mallett, Claude Roux, Didier Meuwly, Philip Maynard
As a result of the worldwide deployment of surveillance cameras, authorities have gained a powerful tool that captures footage of activities of people in public areas. Surveillance cameras allow continuous monitoring of the area and allow footage to be obtained for later use, if a criminal or other act of interest occurs. Following this, a forensic practitioner, or expert witness can be required to analyse the footage of the Person of Interest. The examination ultimately aims at evaluating the strength of evidence at source and activity levels...
February 6, 2018: Forensic Science International
https://www.readbyqxmd.com/read/29453005/post-mortem-quetiapine-concentrations-in-hair-segments-of-psychiatric-patients-correlation-between-hair-concentration-dose-and-concentration-in-blood
#10
Kamilla Nyborg Günther, Sys Stybe Johansen, Marie Katrine Klose Nielsen, Petra Wicktor, Jytte Banner, Kristian Linnet
Drug analysis in hair is useful when seeking to establish drug intake over a period of months to years. Segmental hair analysis can also document whether psychiatric patients are receiving a stable intake of antipsychotics. This study describes segmental analysis of the antipsychotic drug quetiapine in post-mortem hair samples from long-term quetiapine users by ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) analysis. The aim was to obtain more knowledge on quetiapine concentrations in hair and to relate the concentration in hair to the administered dose and the post-mortem concentration in femoral blood...
February 3, 2018: Forensic Science International
https://www.readbyqxmd.com/read/29452421/the-short-cosyntropintest-revisited-new-normal-reference-range-using-lcmsms
#11
Grethe Å Ueland, Paal Methlie, Marianne Øksnes, Hrafnkell B Thordarson, Jørn Sagen, Ralf Kellmann, Gunnar Mellgren, Maria Ræder, Per Dahlqvist, Sandra R Dahl, Per M Thorsby, Kristian Løvås, Eystein S Husebye
Background: The cosyntropin test is used to diagnose adrenal insufficiency (AI) and non-classical congenital adrenal hyperplasia (NCCAH). Current cutoffs for cortisol and 17-hydroxyprogesterone (17-OHP) are derived from non-standardized immunoassays. Liquid chromatography tandem mass spectrometry (LCMSMS) offers direct measurement of steroids, prompting the need to re-establish normal ranges. Aim: Define cutoff values for cortisol and 17-OHP in serum by LCMSMS 30 and 60 minutes after intravenous administration of 250 µg tetracosactide acetate (Synachten©) to healthy volunteers, and compare LCMSMS with routine immunoassays...
February 14, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29452231/the-association-of-22-y-chromosome-short-tandem-repeat-loci-with-initiative-aggressive-behavior
#12
Chun Yang, Huajie Ba, Wei Zhang, Shuyou Zhang, Hanqing Zhao, Haiying Yu, Zhiqin Gao, Binbin Wang
Aggressive behavior represents an important public concern and a clinical challenge to behaviorists and psychiatrists. Aggression in humans is known to have an important genetic basis, so to investigate the association of Y chromosome short tandem repeat (Y-STR) loci with initiative-aggressive behavior, we compared allelic and haplotypic distributions of 22 Y-STRs in a group of Chinese males convicted of premeditated extremely violent crimes (n = 271) with a normal control group (n = 492). Allelic distributions of DYS533 and DYS437 loci differed significantly between the two groups (P < 0...
February 13, 2018: Gene
https://www.readbyqxmd.com/read/29452212/exploring-in-vivo-metabolism-and-excretion-of-qo-58l-using-ultra-high-performance-liquid-chromatography-coupled-with-tandem-mass-spectrometry
#13
Jiaqi Zhang, Qingzhong Jia, Jinlong Qi, Hailin Zhang, Yaru Wu, Xiaowei Shi
QO-58 lysine (QO-58L) as a new potassium channel opener, reported to have a potential activity to cure neuropathic pain. The aim of this research is to develop and validate a high-performance liquid chromatography with tandem spectrometry (LC-MS/MS) method for the quantification of QO-58L in rat urine, feces and bile. In addition, analyze and identify the metabolites in urine and bile. The assay for this compound in samples detected with multiple reaction monitoring mode (MRM), and take nimodipine as internal standards (IS)...
February 13, 2018: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29452113/technological-innovation-strategies-for-the-specific-treatment-of-chagas-disease-based-on-benznidazole
#14
REVIEW
Leslie Raphael de Moura Ferraz, Alinne Élida Gonçalves Alves, Débora Dolores Souza da Silva Nascimento, Isabela Araújo E Amariz, Aline Silva Ferreira, Salvana Priscylla Manso Costa, Larissa Araújo Rolim, Ádley Antonini Neves de Lima, Pedro José Rolim Neto
Caused by Trypanosoma cruzi, Chagas disease is responsible for public health problems greater in magnitude than those attributed to malaria, schistosomiasis, or leishmaniasis. A factor in the socioeconomic development of poor countries, Chagas disease can cause death due to a high parasitic burden during its acute phase due and irreversible damage in organs such as the heart, esophagus, and colon during its chronic phase, even when the number of parasites is minimal. For treating Chagas disease, benznidazole (BNZ) remains the drug of choice and, in Latin America, the only drug on the market for treating the disease...
February 13, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29451398/examining-heat-treatment-for-stabilization-of-the-lipidome
#15
Jeremy P Koelmel, Christina M Jones, Candice Z Ulmer, Timothy J Garrett, Richard A Yost, Tracey B Schock, John A Bowden
AIM: To confidently determine lipid-based biomarkers, it is important to minimize variation introduced during preanalytical steps. We evaluated reducing variation associated with lipid measurements in invertebrate sentinel species using a state-of-the-art heat treatment technique. MATERIALS AND METHODS: Earthworms (Eisenia fetida), house crickets (Acheta domestica) and ghost shrimp (Palaemonetes paludosus) were euthanized either by flash freezing or heat treatment...
February 16, 2018: Bioanalysis
https://www.readbyqxmd.com/read/29451013/pradimicin-ird-from-amycolatopsis-sp-ird-009-and-its-antimicrobial-and-cytotoxic-activities
#16
Anelize Bauermeister, Felipe A Calil, Francisco das C L Pinto, Talita C T Medeiros, Larissa C Almeida, Leonardo J Silva, Itamar S de Melo, Tiago D Zucchi, Letícia V Costa-Lotufo, Luiz A B Moraes
A new polycyclic antibiotic, pradimicin-IRD, was isolated from actinobacteria Amycolatopsis sp. IRD-009 recovered from soil of Brazilian rainforest undergoing restoration area. This molecule is the major compound produced in solid culture media. The new compound was detected by a focused method of precursor ion (high-performance liquid chromatography coupled to tandem mass spectrometer) developed previously to identify unusual aminoglycosyl sugar moieties. The compound was isolated and its structure was, therefore, elucidated by high-resolution mass spectrometry, and 1D and 2D nuclear magnetic resonance experiments...
February 16, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29450702/establishment-and-characterization-of-the-ncc-ss1-c1-synovial-sarcoma-cell-line
#17
Fusako Kito, Rieko Oyama, Yoko Takai, Marimu Sakumoto, Kumiko Shiozawa, Zhiwei Qiao, Takenori Uehara, Akihiko Yoshida, Akira Kawai, Tadashi Kondo
Synovial sarcoma is an aggressive mesenchymal malignancy characterized by unique gene fusions. Tissue culture cells are essential tools for further understanding tumorigenesis and anti-cancer drug development; however, only a limited number of well-characterized synovial sarcoma cell lines exist. Thus, the objective of this study was to establish a patient-derived synovial sarcoma cell line. We established a synovial sarcoma cell line from tumor tissue isolated from a 72-year-old female patient. Prepared cells were analyzed for the presence of gene fusions by fluorescence in situ hybridization, RT-PCR, and karyotyping...
February 15, 2018: Human Cell
https://www.readbyqxmd.com/read/29450654/visualizing-protoporphyrin-ix-formation-in-the-dura-tail-of-meningiomas-by-mass-spectrometry-imaging
#18
Benjamin Brokinkel, Sabrina Kröger, Volker Senner, Astrid Jeibmann, Uwe Karst, Walter Stummer
BACKGROUND: The advantages of 5-aminolevulinacid (5-ALA)-induced fluorescence-guided surgery in meningiomas are increasingly discussed. In this context, despite detectable tumor tissue in histopathologial analyses, no fluorescence was shown at the dura tail using the standard operating microscope. Thus, 5-ALA metabolism in this surgically important site remains unknown but needs to be elucidated when further evaluating indications of fluorescence-guided surgery in meningiomas. METHOD: We here present the spatially resolved identification of protoporphyrin IX (PpIX) in sphenoid ridge meningioma cryosections from a patient who underwent fluorescence-guided microsurgery using molecular imaging analysis by matrix-assisted laser desorption/ionization tandem mass spectrometry (MALDI-MS/MS)...
February 15, 2018: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29450643/variants-in-fix-propeptide-associated-with-vitamin-k-antagonist-hypersensitivity-functional-analysis-and-additional-data-confirming-the-common-founder-mutations
#19
Behnaz Pezeshkpoor, Katrin J Czogalla, Michael Caspers, Ann-Cristin Berkemeier, Kerstin Liphardt, Suvoshree Ghosh, Marco Kellner, Silvia Ulrich, Anna Pavlova, Johannes Oldenburg
One of the most common and unwanted side effects during oral anticoagulant therapy (OAT) is bleeding complications. In rare cases, vitamin K antagonist (VKA)-related bleeding events are associated with mutations affecting the F9 propeptide at amino acid position 37 due to a substitution of alanine to either valine or threonine. Based on our actual cohort of 18 patients, we update the knowledge on this rare phenotype and its origin. A founder mutation for both variants was reconfirmed by haplotype analysis of intronic and extragenic short tandem repeat (STR) polymorphisms with a higher prevalence in Switzerland than in other regions of Europe...
February 15, 2018: Annals of Hematology
https://www.readbyqxmd.com/read/29450115/plipastatin-a1-produced-by-a-marine-sediment-derived-bacillus-amyloliquefaciens-sh-b74-contributes-to-the-control-of-gray-mold-disease-in-tomato
#20
Zongwang Ma, Jiangchun Hu
Certain Bacillus species have the capacity to produce cyclic lipopeptides and these lipopeptides are promising determinants contributing to the biocontrol of plant diseases. In the current study, a cyclic lipopeptide plipastatin A1 was isolated from the fermentation broth of a marine sediment-derived Bacillus amyloliquefaciens SH-B74 by the combination of solid-phase extraction and reversed-phase high-performance liquid chromatography, and its structure was identified by tandem mass spectrometry, high-resolution electro-spray ionization mass spectrometry, and gas chromatography-mass spectrometry together with nuclear magnetic resonance analysis...
February 2018: 3 Biotech
keyword
keyword
113123
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"