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https://www.readbyqxmd.com/read/28088767/pharmacokinetic-study-of-anidulafungin-in-icu-patients-with-intra-abdominal-candidiasis
#1
H Dupont, L Massias, B Jung, N Ammenouche, P Montravers
BACKGROUND: Only limited pharmacokinetic data are available for anidulafungin in ICU patients, especially in patients treated for severe intra-abdominal infection (IAI). METHODS: This was a prospective multicentre observational study in ICU patients with suspected yeast IAI. All patients received an intravenous loading dose of 200 mg of anidulafungin, followed by 100 mg/day. Thirteen blood samples were drawn between day 1 and day 5 for pharmacokinetic analysis...
January 14, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28088620/relations-between-neighbourhood-socioeconomic-status-and-birth-outcomes-are-mediated-by-maternal-weight
#2
Zahra M Clayborne, Gerald F Giesbrecht, Rhonda C Bell, Lianne M Tomfohr-Madsen
Lower neighbourhood-level socioeconomic status (SES) has been repeatedly associated with an increased risk of adverse birth outcomes, even after controlling for individual-level SES. Few studies have empirically assessed potential mechanisms underlying the associations. The objectives of this study were to (1) examine relations between neighbourhood SES and birth outcomes, and (2) explore if maternal weight variables mediated these relations. Data came from a provincial prospective pregnancy cohort study in Canada...
December 29, 2016: Social Science & Medicine
https://www.readbyqxmd.com/read/28088283/quantification-of-plasma-sulfatides-by-mass-spectrometry-utility-for-metachromatic-leukodystrophy
#3
Jennifer T Saville, Nicholas J C Smith, Janice M Fletcher, Maria Fuller
Impaired sulfatide catabolism is the primary biochemical insult in patients with the inherited neurodegenerative disease, metachromatic leukodystrophy (MLD), and sulfatide elevation in body fluids is useful in the diagnostic setting. Here we used mass spectrometry to quantify fourteen species of sulfatide, in addition to the deacetylated derivative, lyso-sulfatide, using high pressure liquid chromatography-electrospray ionisation-tandem mass spectrometry in both positive and negative ion mode. A single phase extraction of 0...
February 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28088045/uhplc-ms-ms-method-for-the-quantitation-of-penicillin-g-and-metabolites-in-citrus-fruit-using-internal-standards
#4
Daniele Canzani, Kevin Hsieh, Matthew Standland, Walter Hammack, Fadi Aldeek
Penicillin G has been applied to citrus trees as a potential treatment in the fight against Huanglongbing (HLB). Here, we have developed and validated a method to identify and quantitate penicillin G and two of its metabolites, penillic acid and penilloic acid, in citrus fruit using ultra high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). This method improves upon a previous method by incorporating isotopically labeled internal standards, namely, penillic acid-D5, and penilloic acid-D5...
January 10, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28088025/residues-of-2-hydroxy-3-phenylpyrazine-a-degradation-product-of-some-%C3%AE-lactam-antibiotics-in-environmental-water-in-vietnam
#5
Nguyen Van Sy, Kazuo Harada, Megumi Asayama, Minae Warisaya, Le Hong Dung, Yoshinori Sumimura, Khong Thi Diep, Le Viet Ha, Nguyen Nam Thang, Tran Thi Tuyet Hoa, Tran Minh Phu, Pham Ngoc Khai, Nguyen Thanh Phuong, Le Danh Tuyen, Yoshimasa Yamamoto, Kazumasa Hirata
Antibiotic-resistant bacteria have become a serious problem worldwide, caused in part by the excessive use and discharge of antibiotics into the environment. Ampicillin (ABPC) is a widely used antibiotic. However, this chemical rapidly decomposes in water containing divalent cations like Ca(2+) and Mg(2+), thus, detection of ABPC in environmental water is difficult. This study was carried out to evaluate the presence of 2-hydroxy-3-phenylpyrazine (HPP), one of the degradation products of ABPC and β-lactam antibiotics with an ABPC substructure, in environmental water...
January 2, 2017: Chemosphere
https://www.readbyqxmd.com/read/28087663/evolution-and-structural-diversification-of-nictaba-like-lectin-genes-in-food-crops-with-a-focus-on-soybean-glycine-max
#6
Sofie Van Holle, Pierre Rougé, Els J M Van Damme
BACKGROUND AND AIMS: The Nictaba family groups all proteins that show homology to Nictaba, the tobacco lectin. So far, Nictaba and an Arabidopsis thaliana homologue have been shown to be implicated in the plant stress response. The availability of more than 50 sequenced plant genomes provided the opportunity for a genome-wide identification of Nictaba-like genes in 15 species, representing members of the Fabaceae, Poaceae, Solanaceae, Musaceae, Arecaceae, Malvaceae and Rubiaceae. Additionally, phylogenetic relationships between the different species were explored...
January 12, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28087463/effect-of-22-cyp2d6-variants-found-in-the-chinese-population-on-tolterodine-metabolism-in-vitro
#7
Hao Wang, Da-Peng Dai, Peng Sun, Li-Ping Xu, Bing-Qing Liang, Jian-Ping Cai, Guo-Xin Hu
Cytochrome P450 2D6 (CYP2D6) is an important member of the cytochrome P450 enzyme superfamily. We recently identified 22 novel variants in the Chinese population using PCR and bidirectional sequencing methods. The aim of this study is to characterize the enzymatic activity of these variants and their effects on the metabolism of the antimuscarinic drug tolterodine in vitro. A baculovirus-mediated expression system was used to express wild-type CYP2D6 and 24 variants (CYP2D6*2, CYP2D6*10, and 22 novel CYP2D6 variants) at high levels...
January 10, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28087334/the-short-and-long-term-proteomic-effects-of-sleep-deprivation-on-the-cortical-and-thalamic-synapses
#8
Attila Simor, Balázs András Györffy, Péter Gulyássy, Katalin Völgyi, Vilmos Tóth, Mihail Ivilinov Todorov, Viktor Kis, Zsolt Borhegyi, Zoltán Szabó, Tamás Janáky, László Drahos, Gábor Juhász, Katalin Adrienna Kékesi
Acute total sleep deprivation (SD) impairs memory consolidation, attention, working memory and perception. Structural, electrophysiological and molecular experimental approaches provided evidences for the involvement of sleep in synaptic functions. Despite the wide scientific interest on the effects of sleep on the synapse, there is a lack of systematic investigation of sleep-related changes in the synaptic proteome. We isolated parietal cortical and thalamic synaptosomes of rats after 8 h of total SD by gentle handling and 16 h after the end of deprivation to investigate the short- and longer-term effects of SD on the synaptic proteome, respectively...
January 10, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/28087279/alpha-2-macroglobulin-and-heparin-cofactor-ii-and-the-vulnerability-of-carotid-atherosclerotic-plaques-an-itraq-based-analysis
#9
Jinmao Li, Xi Liu, Ying Xiang, Xueying Ding, Teng Wang, Ying Liu, Maojia Yin, Changhong Tan, Fen Deng, Lifen Chen
Rupture of carotid atherosclerotic plaque may cause stroke, while few biomarker in clinic can evaluate carotid plaque vulnerability. In this study, we divided the recruited participants into no plaque, stable plaque, and vulnerable plaque group according to carotid ultrasonography, and screened the differentially expressed proteins in plasma of these participants using isobaric tags for relative and absolute quantitation labeling coupled with liquid chromatography-tandem mass spectrometry. 28 proteins were identified differentially expressed, among which alpha-2-macroglobulin (α2M) and heparin cofactor II (HCII) were found to be at hub position in the interactions of these proteins by STRING analysis and were selected for enzyme-linked immunosorbent assay measurement to assess their relevance with carotid plaques vulnerability and diagnostic efficiency...
January 10, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28087056/extraction-chromatographic-separations-of-tantalum-and-tungsten-from-hafnium-and-complex-matrix-constituents
#10
Mathew S Snow, Martha R Finck, Kevin P Carney, Samuel S Morrison
Tantalum (Ta), hafnium (Hf), and tungsten (W) analyses from complex matrices require high purification of these analytes from each other and major/trace matrix constituents, however, current state-of-the-art Ta/Hf/W separations rely on traditional anion exchange approaches that show relatively similar distribution coefficient (Kd) values for each element. This work reports an assessment of three commercially available extraction chromatographic resins (TEVA, TRU, and UTEVA) for Ta/Hf/W separations. Batch contact studies show differences in Ta/Hf and Ta/W Kd values of up to 10(6) and 10(4) (respectively), representing an improvement of a factor of 100 and 300 in Ta/Hf and Ta/W Kd values (respectively) over AG1×4 resin...
January 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28087055/graft-modification-of-cotton-with-phosphate-group-and-its-application-to-the-enrichment-of-phosphopeptides
#11
Xiao-Mei He, Xi Chen, Bi-Feng Yuan, Yu-Qi Feng
Grafting copolymerization, especially "grafting from" approach, has attracted a great attention for the preparation of cellulose-based materials with various functionalities. In this study, a novel phosphate group-containing cotton fiber-based material, CF-NH2-AZO-p(VPA-x), was successfully synthesized by a "grafting from" radical polymerization approach using vinyl phosphonic acid (VPA) as monomer. The phosphate group content of CF-NH2-AZO-p(VPA-x) could be easily regulated by adjusting the concentration of VPA monomer...
January 9, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28086949/nek2-promotes-aerobic-glycolysis-in-multiple-myeloma-through-regulating-splicing-of-pyruvate-kinase
#12
Zhimin Gu, Jiliang Xia, Hongwei Xu, Ivana Frech, Guido Tricot, Fenghuang Zhan
BACKGROUND: Aerobic glycolysis, a hallmark of cancer, is characterized by increased metabolism of glucose and production of lactate in normaxia. Recently, pyruvate kinase M2 (PKM2) has been identified as a key player for regulating aerobic glycolysis and promoting tumor cell proliferation and survival. METHODS: Tandem affinity purification followed up by mass spectrometry (TAP-MS) and co-immunoprecipitation (Co-IP) were used to study the interaction between NIMA (never in mitosis gene A)-related kinase 2 (NEK2) and heterogeneous nuclear ribonucleoproteins (hnRNP) A1/2...
January 13, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/28086912/wwl70-attenuates-pge2-production-derived-from-2-arachidonoylglycerol-in-microglia-by-abhd6-independent-mechanism
#13
Mikiei Tanaka, Sean Moran, Jie Wen, Kwame Affram, Tinghua Chen, Aviva J Symes, Yumin Zhang
BACKGROUND: α/β-Hydrolase domain 6 (ABHD6) is one of the major enzymes for endocannabinoid 2-arachidonoylglycerol (2-AG) hydrolysis in microglia cells. Our recent studies have shown that a selective ABHD6 inhibitor WWL70 has anti-inflammatory and neuroprotective effects in animal models of traumatic brain injury and multiple sclerosis. However, the role of ABHD6 in the neuroinflammatory response and the mechanisms by which WWL70 suppresses inflammation has not yet been elucidated in reactive microglia...
January 10, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28081507/occurrence-fate-and-environmental-risk-of-linear-alkylbenzene-sulfonate-in-the-langat-and-selangor-river-basins-malaysia
#14
Nobumitsu Sakai, Junichi Shirasaka, Yasuto Matsui, Mohd Redzuan Ramli, Kousuke Yoshida, Mustafa Ali Mohd, Minoru Yoneda
Five homologs (C10-C14) of linear alkylbenzene sulfonate (LAS) were quantitated in surface water collected in the Langat and Selangor River basins using liquid chromatography-tandem mass spectrometry (LC-MS/MS). A geographic information system (GIS) was used to spatially analyze the occurrence of LAS in both river basins, and the LAS contamination associated with the population was elucidated by spatial analysis at a sub-basin level. The LAS concentrations in the dissolved phase (<0.45 μm) and 4 fractions separated by particle size (<0...
December 31, 2016: Chemosphere
https://www.readbyqxmd.com/read/28081498/enhancing-analysis-throughput-sensitivity-and-specificity-in-lc-esi-ms-ms-assay-of-plasma-25-hydroxyvitamin-d3-by-derivatization-with-triplex-4-4-dimethylaminophenyl-1-2-4-triazoline-3-5-dione-daptad-isotopologues
#15
Shoujiro Ogawa, Hiroki Kittaka, Akiho Nakata, Kenji Komatsu, Takahiro Sugiura, Mamoru Satoh, Fumio Nomura, Tatsuya Higashi
The plasma/serum concentration of 25-hydroxyvitamin D3 [25(OH)D3] is a diagnostic index for vitamin D deficiency/insufficiency, which is associated with a wide range of diseases, such as rickets, cancer and diabetes. We have reported that the derivatization with 4-(4-dimethylaminophenyl)-1,2,4-triazoline-3,5-dione (DAPTAD) works well in the liquid chromatography/electrospray ionization-tandem mass spectrometry (LC/ESI-MS/MS) assay of the serum/plasma 25(OH)D3 for enhancing the sensitivity and the separation from a potent interfering metabolite, 3-epi-25-hydroxyvitamin D3 [3-epi-25(OH)D3]...
November 17, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28081270/outcome-and-treatment-effects-in-stroke-associated-with-acute-cervical-ica-occlusion
#16
Michael Gliem, John-Ih Lee, Aurica Barckhan, Bernd Turowski, Hans-Peter Hartung, Sebastian Jander
BACKGROUND: Endovascular therapy (EVT) with stent retrievers in addition to i.v. thrombolysis (IVT) has proven effective in acute stroke patients with middle cerebral artery (MCA, M1 segment) and distal internal carotid artery (ICA) occlusion. Limited data exist concerning acute cervical ICA occlusion, either alone or in combination with intracranial ICA occlusion (tandem occlusion). Therefore we analyzed outcome and treatment effects in stroke associated with cervical ICA occlusion, with specific focus on the impact of intracranial ICA or M1 patency...
2017: PloS One
https://www.readbyqxmd.com/read/28080998/determination-of-oxycodone-and-its-major-metabolites-noroxycodone-and-oxymorphone-by-ultra-high-performance-liquid-chromatography-tandem-mass-spectrometry-in-plasma-and-urine-application-to-real-cases
#17
Flaminia Pantano, Stefano Brauneis, Alexandre Forneris, Roberta Pacifici, Enrico Marinelli, Chrystalla Kyriakou, Simona Pichini, Francesco Paolo Busardò
BACKGROUND: Oxycodone is a narcotic drug widely used to alleviate moderate and severe acute and chronic pain. Variability in analgesic efficacy could be explained by inter-subject variations in plasma concentrations of parent drug and its active metabolite, oxymorphone. To evaluate patient compliance and to set up therapeutic drug monitoring (TDM), an ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) assay was developed and validated for the parent drug and its major metabolites noroxycodone and oxymorphone...
January 12, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28077981/dna-polymerase-kappa-protects-human-cells-against-mmc-induced-genotoxicity-through-error-free-translesion-dna-synthesis
#18
Yuki Kanemaru, Tetsuya Suzuki, Akira Sassa, Kyomu Matsumoto, Noritaka Adachi, Masamitsu Honma, Satoshi Numazawa, Takehiko Nohmi
BACKGROUND: Interactions between genes and environment are critical factors for causing cancer in humans. The genotoxicity of environmental chemicals can be enhanced via the modulation of susceptible genes in host human cells. DNA polymerase kappa (Pol κ) is a specialized DNA polymerase that plays an important role in DNA damage tolerance through translesion DNA synthesis. To better understand the protective roles of Pol κ, we previously engineered two human cell lines either deficient in expression of Pol κ (KO) or expressing catalytically dead Pol κ (CD) in Nalm-6-MSH+ cells and examined cytotoxic sensitivity against various genotoxins...
2017: Genes and Environment: the Official Journal of the Japanese Environmental Mutagen Society
https://www.readbyqxmd.com/read/28077790/flt3-activating-mutations-display-differential-sensitivity-to-multiple-tyrosine-kinase-inhibitors
#19
Bao Nguyen, Allen B Williams, David J Young, Hayley Ma, Li Li, Mark Levis, Patrick Brown, Donald Small
Fms-like tyrosine kinase-3 (FLT3) is a receptor tyrosine kinase that normally functions in hematopoietic cell survival, proliferation and differentiation. Constitutively activating mutations of FLT3 map predominately to the juxtamembrane domain (internal tandem duplications; ITD) or the activation loop (AL) of the kinase domain and are detected in about 1/3 of de novo acute myeloid leukemia (AML) patients. Small molecule tyrosine kinase inhibitors (TKI) effectively target FLT3/ITD mutations, but some activating mutations, particularly those on the AL, are relatively resistant to many FLT3 TKI...
January 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28077380/metabolomic-profiles-as-reliable-biomarkers-of-dietary-composition
#20
Tõnu Esko, Joel N Hirschhorn, Henry A Feldman, Yu-Han H Hsu, Amy A Deik, Clary B Clish, Cara B Ebbeling, David S Ludwig
BACKGROUND: Clinical nutrition research often lacks robust markers of compliance, complicating the interpretation of clinical trials and observational studies of free-living subjects. OBJECTIVE: We aimed to examine metabolomics profiles in response to 3 diets that differed widely in macronutrient composition during a controlled feeding protocol. DESIGN: Twenty-one adults with a high body mass index (in kg/m(2); mean ± SD: 34.4 ± 4.9) were given hypocaloric diets to promote weight loss corresponding to 10-15% of initial body weight...
January 11, 2017: American Journal of Clinical Nutrition
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