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https://www.readbyqxmd.com/read/27889674/design-synthesis-characterization-and-cation-sensing-behavior-of-amino-naphthoquinone-receptor-selective-colorimetric-sensing-of-cu-ii-ion-in-nearly-aqueous-solution-with-mimicking-logic-gate-operation
#1
C Parthiban, Kuppanagounder P Elango
An amino-naphthoquione receptor (R1) has been rationally designed, synthesized and characterized using (1)H and (13)C NMR, LCMS and single crystal X-ray diffraction studies. The receptor exhibits an instantaneous colour change from yellow to blue selectively with Cu(II) ions in water-DMF (98:2% v/v) medium. The results of UV-Vis and fluorescence spectral studies indicates that the mechanism of sensing involves formation of a 1:1 complex between R1 and Cu(II) ion. The proposed mechanism has been confirmed through product analysis using FT-IR, UV-Vis, EPR and HRMS studies in addition to magnetic moment and elemental analysis measurements...
November 18, 2016: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/27867266/a-new-antifungal-isocoumarin-from-the-endophytic-fungus-trichoderma-sp-09-of-myoporum-bontioides-a-gray
#2
Wensheng Li, Jiaxin Xu, Fenqi Li, Li Xu, Chunyuan Li
BACKGROUND: Myoporum bontioides A. Gray is a commonly used medicinal plant in China. Recently, the chemical and bioactive investigations to the endophytic fungi of this plant have led to several new compounds with antimicrobial and cytotoxic activities. To find out more active molecules, the metabolites of an endophytic fungus, Trichoderma sp. 09 from the root of Myoporum bontioides were investigated. MATERIALS AND METHODS: The metabolites were isolated by column chromatography on silica gel, and their structures were elucidated on the basis of spectroscopic analysis[one-dimensional (1D), two-dimensional (2D)-nuclear magnetic resonance (NMR), Mass spectrometry (MS)], and by comparison with the published data...
October 2016: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/27862978/abcc3-polymorphisms-and-mrna-expression-influence-the-concentration-of-a-carboxylic-acid-metabolite-in-patients-on-clopidogrel-and-aspirin-therapy
#3
André Ducati Luchessi, Marta Concheiro, Juliana de Freitas Germano, Vivian Nogueira Silbiger, Raul Hernandes Bortolin, Angelines Cruz, Oscar Quintela, Maria Brion, Angel Carracedo, Andres Iñiguez, Marisol Bravo, Manuel López-Rivadulla, Rosario Dominguez Crespo Hirata, Amanda Guerra Moraes Rego Sousa, Mario Hiroyuki Hirata
Acetylsalicylic acid and clopidogrel combined therapy has been reported to be beneficial in patients with acute coronary syndrome (ACS). Antiplatelet drug resistance, especially to clopidogrel, is a multifactorial phenomenon that affects a large number of ACS patients. The genetic contribution to this drug response is not fully elucidated. We investigated the relationship of ABC-type efflux subfamily C member 3 (ABCC3) polymorphisms and mRNA expression with plasma concentrations of clopidogrel, salicylic acid (SA), and a carboxylic acid metabolite (CAM)...
November 12, 2016: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/27855512/2016-white-paper-on-recent-issues-in-bioanalysis-focus-on-biomarker-assay-validation-bav-part-3-lba-biomarkers-and-immunogenicity
#4
Susan Richards, Lakshmi Amaravadi, Renuka Pillutla, Herbert Birnboeck, Albert Torri, Kyra J Cowan, Apollon Papadimitriou, Fabio Garofolo, Christina Satterwhite, Steven Piccoli, Bonnie Wu, Corinna Krinos-Fiorotti, John Allinson, Flora Berisha, Laurent Cocea, Stephanie Croft, Stephanie Fraser, Fabrizio Galliccia, Boris Gorovits, Swati Gupta, Vinita Gupta, Sam Haidar, Charles Hottenstein, Akiko Ishii-Watabe, Darshana Jani, John Kadavil, John Kamerud, Daniel Kramer, Virginia Litwin, Gustavo Mendes Lima Santos, Robert Nelson, Yan Ni, João Pedras-Vasconcelos, Yongchang Qiu, Paul Rhyne, Afshin Safavi, Yoshiro Saito, Natasha Savoie, Kara Scheibner, Eginhard Schick, Patricia Y Siguenza, John Smeraglia, Roland F Staack, Meena Subramanyam, Giane Sumner, Theingi Thway, David Uhlinger, Martin Ullmann, Alessandra Vitaliti, Jan Welink, Chan C Whiting, Li Xue, Rong Zeng
The 2016 10th Workshop on Recent Issues in Bioanalysis (10th WRIB) took place in Orlando, Florida with participation of close to 700 professionals from pharmaceutical/biopharmaceutical companies, biotechnology companies, contract research organizations, and regulatory agencies worldwide. WRIB was once again a weeklong event - A Full Immersion Week of Bioanalysis for PK, Biomarkers and Immunogenicity. As usual, it is specifically designed to facilitate sharing, reviewing, discussing and agreeing on approaches to address the most current issues of interest including both small and large molecules involving LCMS, hybrid LBA/LCMS, and LBA approaches, with the focus on PK, biomarkers and immunogenicity...
December 2016: Bioanalysis
https://www.readbyqxmd.com/read/27855509/2016-white-paper-on-recent-issues-in-bioanalysis-focus-on-biomarker-assay-validation-bav-part-2-hybrid-lba-lcms-and-input-from-regulatory-agencies
#5
An Song, Anita Lee, Fabio Garofolo, Surinder Kaur, Jeff Duggan, Christopher Evans, Joe Palandra, Lorella Di Donato, Keyang Xu, Ronald Bauer, Mark Bustard, Linzhi Chen, Laurent Cocea, Stephanie Croft, Fabrizio Galliccia, Sam Haidar, Nicola Hughes, Akiko Ishii-Watabe, Rafiqul Islam, Barry Jones, John Kadavil, Carsten Krantz, Gustavo Mendes Lima Santos, Timothy Olah, João Pedras-Vasconcelos, Ludovicus Staelens, Yoshiro Saito, Natasha Savoie, Kara Scheibner, Susan Spitz, Nilufer Tampal, Eric Thomas, Stephen Vinter, Jason Wakelin-Smith, Jan Welink, Jianing Zeng, Shaolian Zhou
The 2016 10th Workshop on Recent Issues in Bioanalysis (10(th) WRIB) took place in Orlando, Florida with participation of close to 700 professionals from pharmaceutical/biopharmaceutical companies, biotechnology companies, contract research organizations, and regulatory agencies worldwide. WRIB was once again a 5-day, weeklong event - A Full Immersion Week of Bioanalysis including Biomarkers and Immunogenicity. As usual, it is specifically designed to facilitate sharing, reviewing, discussing and agreeing on approaches to address the most current issues of interest including both small and large molecules involving LCMS, hybrid LBA/LCMS, and LBA approaches, with the focus on biomarkers and immunogenicity...
December 2016: Bioanalysis
https://www.readbyqxmd.com/read/27832539/profiling-changes-in-histone-post-translational-modifications-by-top-down-mass-spectrometry
#6
Mowei Zhou, Si Wu, David L Stenoien, Zhaorui Zhang, Lanelle Connolly, Michael Freitag, Ljiljana Paša-Tolić
Top-down mass spectrometry is a valuable tool for understanding gene expression through characterization of combinatorial histone post-translational modifications (i.e., histone code). In this protocol, we describe a top-down workflow that employs liquid chromatography (LC) coupled to mass spectrometry (MS), for fast global profiling of changes in histone proteoforms, and apply LCMS top-down approach for comparative analysis of a wild-type and a mutant fungal species. The proteoforms exhibiting differential abundances can be subjected to further targeted studies by other MS or orthogonal (e...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27826811/inducible-de-novo-biosynthesis-of-isoflavonoids-in-soybean-leaves-by-spodoptera-litura-derived-elicitors-tracer-techniques-aided-by-high-resolution-lcms
#7
Ryu Nakata, Yuki Kimura, Kenta Aoki, Naoko Yoshinaga, Masayoshi Teraishi, Yutaka Okumoto, Alisa Huffaker, Eric A Schmelz, Naoki Mori
Isoflavonoids are a characteristic family of natural products in legumes known to mediate a range of plant-biotic interactions. For example, in soybean (Glycine max: Fabaceae) multiple isoflavones are induced and accumulate in leaves following attack by Spodoptera litura (Lepidoptera: Noctuidae) larvae. To quantitatively examine patterns of activated de novo biosynthesis, soybean (Var. Enrei) leaves were treated with a combination of plant defense elicitors present in S. litura gut content extracts and L-α-[(13)C9, (15)N]phenylalanine as a traceable isoflavonoid precursor...
November 8, 2016: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/27826629/isomeric-complexity-of-glycosylation-documented-by-ms-n
#8
David J Ashline, Hailong Zhang, Vernon N Reinhold
Re-analysis of two breast cancer cell lines, MCF-7 and MDA-MB-231, has shown multiple isomeric structures exposed by sequential mass spectrometry, MS (n) . Several released glycan compositions were re-evaluated, which indicated variations in polylactosamine and fucosylation structures. Probable isomer numbers, when considering both stereo and structural entities, are significant and the varying types are mentioned. The structural isomers of linkage position are most frequently considered, while stereo isomers are usually assumed from biosynthetic data...
November 8, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27779395/dragmacidins-g-and-h-bisindole-alkaloids-tethered-by-a-guanidino-ethylthiopyrazine-moiety-from-a-lipastrotethya-sp-marine-sponge
#9
Yuki Hitora, Kentaro Takada, Yuji Ise, Shigeru Okada, Shigeki Matsunaga
LCMS analysis of the extract and a cytotoxicity assay of the HPLC fractions generated from a small-scale extract of a Lipastrotethya sp. marine sponge demonstrated the presence of bisindole alkaloids that were associated with the cytotoxic activity. Two bisindole alkaloids tethered by a guanidino ethylthiopyrazine moiety, dragmacidins G (1) and H (2), were isolated, and their structures were assigned by analysis of the MS and NMR data. They showed moderate cytotoxic activity against HeLa cells.
October 25, 2016: Journal of Natural Products
https://www.readbyqxmd.com/read/27761064/human-cytochrome-p450-enzyme-modulation-by-gymnema-sylvestre-a-predictive-safety-evaluation-by-lc-ms-ms
#10
Bera Rammohan, Karmakar Samit, Das Chinmoy, Saha Arup, Kundu Amit, Sarkar Ratul, Karmakar Sanmoy, Adhikari Dipan, Sen Tuhinadri
BACKGROUND: Traditionally GS is used to treat diabetes mellitus. Drug-herb interaction of GS via cytochrome P450 enzyme system by substrate cocktail method using HLM has not been reported. OBJECTIVE: To evaluate the in-vitro modulatory effects of GS extracts (aqueous, methanol, ethyl acetate, chloroform and n-hexane) and deacylgymnemic acid (DGA) on human CYP1A2, 2C8, 2C9, 2D6 and 3A4 activities in HLM. MATERIAL AND METHODS: Probe substrate-based LCMS/MS method was established for all CYPs...
July 2016: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/27757692/novel-thiazole-based-styryl-dyes-with-benzimidazole-unit-synthesis-photophysical-and-td-dft-studies
#11
Rajratna P Tayade, Nagaiyan Sekar
Three new Y-shaped styryl dyes were designed and synthesized from thiazole carbaldehyde with different active methylene compounds as acceptor moieties. All the dyes were characterized by IR, (1)HNMR, MS/LCMS/HRMS. Spectroscopic properties and non-linear optical properties styryl derivatives were analyzed and the effect of change in solvent polarity on their absorption and emissive properties has been investigated. The dye with (1-phenylethylidene) propanedinitrile unit shows red shift absorption/emission profile among all the dyes...
October 18, 2016: Journal of Fluorescence
https://www.readbyqxmd.com/read/27755546/metabolite-and-lipid-profiling-of-biobank-plasma-samples-collected-prior-to-onset-of-rheumatoid-arthritis
#12
Izabella Surowiec, Lisbeth Ärlestig, Solbritt Rantapää-Dahlqvist, Johan Trygg
OBJECTIVE: The early diagnosis of rheumatoid arthritis (RA) is desirable to install treatment to prevent disease progression and joint destruction. Autoantibodies and immunological markers pre-date the onset of symptoms by years albeit not all patients will present these factors, even at disease onset. Additional biomarkers would be of high value to improve early diagnosis and understanding of the process, leading to disease development. METHODS: Plasma samples donated before the onset of RA were identified in the Biobank of Northern Sweden, a collection within national health survey programs...
2016: PloS One
https://www.readbyqxmd.com/read/27744197/effective-degradation-of-organic-water-pollutants-by-atmospheric-non-thermal-plasma-torch-and-analysis-of-degradation-process
#13
Avinash S Bansode, Supriya E More, Ejaz Ahmad Siddiqui, Shruti Satpute, Absar Ahmad, Sudha V Bhoraskar, Vikas L Mathe
The paper reports the use of atmospheric non-thermal plasma torch as a catalyst for degradation of various organic pollutants dissolved in water. A flow of He mixed with air was used to produce the dielectric barrier discharge (DBD), at the tip of the torch, using pulsed electric excitation at 12 kV. The torch, operated at a power of 750 mW/mm(2), was seen to completely degrade the aqueous solutions of the pollutants namely methylene blue (MB), methyl orange (MO) and rhodamine-B (RB), at around 10(-4) M concentrations, the concentration of polluants is one order higher than of routinely used heterogeneous photocatalytic reactions, within 10 min of irradiation time at room temperature...
October 13, 2016: Chemosphere
https://www.readbyqxmd.com/read/27732556/vitamin-k-plasma-levels-determination-in-human-health
#14
Maria Fusaro, Maurizio Gallieni, Maria Antonietta Rizzo, Andrea Stucchi, Pierre Delanaye, Etienne Cavalier, Rosa M A Moysés, Vanda Jorgetti, Giorgio Iervasi, Sandro Giannini, Fabrizio Fabris, Andrea Aghi, Stefania Sella, Francesco Galli, Valentina Viola, Mario Plebani
Vitamin K (phylloquinone or vitamin K1 and menaquinones or vitamin K2) plays an important role as a cofactor in the synthesis of hepatic blood coagulation proteins, but recently has also aroused an increasing interest for its action in extra-hepatic tissues, in particular in the regulation of bone and vascular metabolism. The accurate measurement of vitamin K status in humans is still a critical issue. Along with indirect assays, such as the undercarboxylated fractions of vitamin K-dependent proteins [prothrombin, osteocalcin (OC), and matrix gla protein], the direct analysis of blood levels of phylloquinone and menaquinones forms might be considered a more informative and direct method for assessing vitamin K status...
October 12, 2016: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/27712081/2016-white-paper-on-recent-issues-in-bioanalysis-focus-on-biomarker-assay-validation-bav-part-1-small-molecules-peptides-and-small-molecule-biomarkers-by-lcms
#15
Eric Yang, Jan Welink, Stephanie Cape, Eric Woolf, Jens Sydor, Christopher James, Dina Goykhman, Mark Arnold, Neil Addock, Ronald Bauer, Michael Buonarati, Eugene Ciccimaro, Raj Dodda, Christopher Evans, Fabio Garofolo, Nicola Hughes, Rafiq Islam, Corey Nehls, Amanda Wilson, Chad Briscoe, Mark Bustard, Laura Coppola, Stephanie Croft, Dieter Drexler, Luca Ferrari, Daniela Fraier, Rand Jenkins, John Kadavil, Lloyd King, Wenkui Li, Gustavo Mendes Lima Santos, Adrien Musuku, Ragu Ramanathan, Yoshiro Saito, Natasha Savoie, Scott Summerfield, Rachel Sun, Nilufer Tampal, Steve Vinter, Jason Wakelin-Smith, Qin Yue
The 2016 10(th) Workshop on Recent Issues in Bioanalysis (10(th) WRIB) took place in Orlando, Florida with participation of close to 700 professionals from pharmaceutical/biopharmaceutical companies, biotechnology companies, contract research organizations, and regulatory agencies worldwide. WRIB was once again a 5-day, weeklong event - A Full Immersion Week of Bioanalysis including Biomarkers and Immunogenicity. As usual, it was specifically designed to facilitate sharing, reviewing, discussing and agreeing on approaches to address the most current issues of interest including both small and large molecule analysis involving LCMS, hybrid LBA/LCMS, and LBA approaches, with the focus on biomarkers and immunogenicity...
October 7, 2016: Bioanalysis
https://www.readbyqxmd.com/read/27709068/bquant-novel-script-for-batch-quantification-of-lcms-data
#16
Marko Rožman, Mira Petrović
Quantitative target analysis by liquid chromatography coupled to mass spectrometry (LCMS) is ubiquitous in environmental, metabolomic and toxicological studies. Targeted LCMS methods are capable of the simultaneous determination of literally hundreds of analytes. Although acquiring of instrumental data is very fast, data post-processing i.e. quantification can be time consuming step (and)or dependent to various commercial software packages. In attempt to facilitate this drawback Wolfram Mathematica script for batch quantification of LCMS data was created...
2016: MethodsX
https://www.readbyqxmd.com/read/27708638/rhamnolipid-biosurfactant-against-fusarium-verticillioides-to-control-stalk-and-ear-rot-disease-of-maize
#17
Siddhartha N Borah, Debahuti Goswami, Hridip K Sarma, Swaranjit S Cameotra, Suresh Deka
Antifungal activity of rhamnolipids (RLs) has been widely studied against many plant pathogenic fungi, but not against Fusarium verticillioides, a major pathogen of maize (Zea mays L.). F. verticillioides causes stalk and ear rot of maize or asymptomatically colonizes the plant and ears resulting in moderate to heavy crop loss throughout the world. F. verticillioides produces fumonisin mycotoxins, reported carcinogens, which makes the contaminated ears unsuitable for consumption. In this study, the RL produced using glucose as sole carbon source was characterized by FTIR and LCMS analyses and its antifungal activity against F...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27695270/bioactivity-of-diterpens-from-the-ethyl-acetate-extract-of-kingiodendron-pinnatum-rox-hams
#18
Komal Kumar Javarappa, Attemode Girijanna Devi Prasad, A J Mahadesh Prasad, Chetana Mane
BACKGROUND: Kingiodendron pinnatum Rox. Hams. is an endangered medicinal plant used in gonorrhoe, catarrhal conditions of genito-urinary and respiratory tracts. The scientific and pharmacological formulation of K. pinnatum has not been established so far though it is being traditionally used by tribes of the region. OBJECTIVE: P hytochemical screening and identification of the bioactive compounds from the ethyl acetate extract of Kingiodendron pinnatum Rox. Hams...
October 2016: Pharmacognosy Research
https://www.readbyqxmd.com/read/27687566/assessing-the-biological-activities-of-xanthone-derivatives-from-swertia-macrosperma-c-b-clark
#19
Yanhua Jia, Chengwen Xiong
The anti-microbial and anti-oxidant effects of xanthones extract from Swertia macrosperma C.B. Clark were investigated using extracts from whole plant and partitioned by petroleum ether, ethyl acetate and n-butanol, respectively. Anti-microbial and anti-oxidant activities were detected among different fractions. High-performance liquid chromatography was performed to separate and purify the elutions. The compounds were elucidated by 1H, 13C NMR and LCMS. The ethyl acetate extract showed maximum inhibitory activity in fungal organisms and Gram-positive bacteria, and had the highest anti-oxidant capacity...
August 10, 2016: Natural Product Research
https://www.readbyqxmd.com/read/27687214/dose-adjusted-plasma-concentrations-of-sublingual-buprenorphine-are-lower-during-than-after-pregnancy
#20
Jaime R Bastian, Huijun Chen, Hongfei Zhang, Scott Rothenberger, Ralph Tarter, Dennis English, Raman Venkataramanan, Steve N Caritis
BACKGROUND: Buprenorphine is an FDA-approved maintenance therapy for opioid use disorders and is increasingly being used in pregnant women with opioid use disorders as an alternative to methadone. Dosing of buprenorphine in pregnant women is based on the regimen recommended for non-pregnant females and males. Limited data are available defining the pharmacokinetic (PK) properties of sublingual (SL) buprenorphine administered during pregnancy. OBJECTIVE: This study evaluated the impact of physiological changes associated with pregnancy on the PK of sublingual buprenorphine during and after pregnancy...
September 26, 2016: American Journal of Obstetrics and Gynecology
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