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https://www.readbyqxmd.com/read/28333961/phytochemical-investigation-of-aloe-pulcherrima-roots-and-evaluation-for-its-antibacterial-and-antiplasmodial-activities
#1
Dele Abdissa, Girma Geleta, Ketema Bacha, Negera Abdissa
Medicinal plants with documented traditional uses remain an important source for the treatment of a wide range of ailments. Evidence shows that majority of the Ethiopian population are still dependent on traditional medicine. Aloe pulcherrima Gilbert & Sebsebe is one of the endemic Aloe species traditionally used for the treatment of malaria and wound healing in central, Southern and Northern part of Ethiopia. The aim of the current study was, therefore, to isolate active compounds from roots of A. pulcherrima and evaluate for their antibacterial and antiplasmodial activities using standard test strains...
2017: PloS One
https://www.readbyqxmd.com/read/28332677/tuneable-reversible-redox-of-cobalt-iii-carbazole-complexes
#2
Michael S Bennington, Humphrey L C Feltham, Zoë J Buxton, Nicholas G White, Sally Brooker
Four tridentate carbazole-based ligands, HL((t)Bu/H) {3,6-di(tert-butyl)-1,8-bis[5-(3-benzyl-1,2,3-triazole)]-9H-carbazole}, HL((t)Bu/(t)Bu) {3,6-di(tert-butyl)-1,8-bis[5-(3-(4-tert-butyl)benzyl-1,2,3-triazole)]-9H-carbazole}, HL(H/H) {1,8-bis[5-(3-benzyl-1,2,3-triazole)]-9H-carbazole} and HL(H/(t)Bu) {1,8-bis[5-(3-(4-tert-butyl)benzyl-1,2,3-triazole)]-9H-carbazole}, were prepared and complexed with cobalt(ii) tetrafluoroborate. In situ air oxidation resulted in cobalt(iii) complexes 1-4 with the general formula [Co(III)(L)2]BF4·xH2O (1: L = L((t)Bu/H), x = 2; 2: L = L((t)Bu/(t)Bu), x = 1; 3: L = L(H/H), x = 0...
March 23, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28329216/heart-mechanics-at-high-altitude-6%C3%A2-days-on-the-top-of-europe
#3
Claire Maufrais, Thomas Rupp, Pierre Bouzat, Gregory Doucende, Samuel Verges, Stéphane Nottin, Guillaume Walther
Aims: The aim of this study was to analyse the underlying mechanisms of left and right ventricular (LV and RV) functional alterations during several days in high-altitude hypoxia. Methods and results: Resting evaluations of LV and RV function and mechanics were assessed by Speckle Tracking Echocardiography on 11 subjects at sea level (SLPRE), 3 ± 2 h after helicopter transport to high altitude (D0), at day 2 (D2), day 4 (D4) and day 6 (D6) at 4350 m and 5 ± 2 h after return to sea level (SLPOST)...
December 22, 2016: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28317225/cr-0-mo-0-and-w-0-isocyanide-complexes-as-luminophores-and-photosensitizers-with-long-lived-excited-states
#4
Laura A Büldt, Oliver S Wenger
Group 6 d6 metal complexes with arylisocyanide ligands are earth-abundant alternatives to photoactive complexes made from precious metals such as Ru(II), Re(I), Os(II), or Ir(III). Some of them have long-lived 3MLCT excited states that exhibit luminescence with good quantum yields combined with nano- to microsecond lifetimes, and they are very strongly reducing. Recent studies have demonstrated that Cr(0), Mo(0), and W(0) arylisocyanides have great potential for application in luminescent devices, photoredox catalysis, and dye-sensitized solar cells...
March 20, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28315598/n-piperonyl-substitution-on-aminoquinoline-pyrimidine-hybrids-effect-on-the-antiplasmodial-potency
#5
Rohit Kholiya, Shabana I Khan, Aparna Bahuguna, Mohit Tripathi, Diwan S Rawat
A series of 4-aminoquinoline-piperonyl-pyrimidine hybrids were synthesized with the aim of identifying compounds with enhanced antimalarial activity. All the synthesized molecules were evaluated in vitro against cultured Plasmodium falciparum W2 and D6 strains and exhibited potent antiplasmodial activities with IC50 values in the range of 0.02-5.16 μM. Out of the 22 synthesised hybrids, 12 were found to be better (up to eight-fold more active) than chloroquine (CQ), particularly against the CQ-resistant W2 strain of P...
March 11, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28301802/illness-severity-and-biomarkers-in-depression-using-a-unidimensional-rating-scale-to-examine-bdnf
#6
Marco A Caldieraro, Edgar A Vares, Lívia H Souza, Lucas Spanemberg, Tadeu A Guerra, Bianca Wollenhaupt-Aguiar, Pâmela Ferrari, Andrew A Nierenberg, Marcelo P Fleck
BACKGROUND: Numerous studies have reported reduced peripheral brain-derived neurotrophic factor (BDNF) in major depression (MD). However, most of these studies used multidimensional depression rating scales, and failed to identify a relationship between BDNF levels and depression severity. Unidimensional scales are a more valid measure of syndrome severity. In these scales, items are ordered in increasing severity, so that as scores increase, syndrome severity increases; thus, each item adds unique information, and items can be totaled to a meaningful sum...
March 6, 2017: Comprehensive Psychiatry
https://www.readbyqxmd.com/read/28286597/extending-the-lifetime-of-hyperpolarized-propane-gas-through-reversible-dissolution
#7
Dudari B Burueva, Alexey S Romanov, Oleg G Salnikov, Vladimir V Zhivonitko, Yu-Wen Chen, Danila A Barskiy, Eduard Y Chekmenev, Dennis W Hwang, Kirill V Kovtunov, Igor V Koptyug
Hyperpolarized (HP) propane produced by the parahydrogen-induced polarization (PHIP) technique has been recently introduced as a promising contrast agent for functional lung magnetic resonance (MR) imaging. However, its short lifetime due to a spin-lattice relaxation time T1 of less than 1 s in the gas phase is a significant translational challenge for its potential biomedical applications. The previously demonstrated approach for extending the lifetime of the HP propane state through long-lived spin states allows the HP propane lifetime to be increased by a factor of ∼3...
March 2, 2017: Journal of Physical Chemistry. C, Nanomaterials and Interfaces
https://www.readbyqxmd.com/read/28280764/lipid-quantitation-and-metabolomics-data-from-vitamin-e-deficient-and-sufficient-zebrafish-embryos-from-0-to-120-hours-post-fertilization
#8
Melissa McDougall, Jaewoo Choi, Hye-Kyeong Kim, Gerd Bobe, J Frederik Stevens, Enrique Cadenas, Robert Tanguay, Maret G Traber
The data herein is in support of our research article by McDougall et al. (2017) [1], in which we used our zebrafish model of embryonic vitamin E (VitE) deficiency to study the consequences of VitE deficiency during development. Adult 5D wild-type zebrafish (Danio rerio), fed defined diets without (E-) or with VitE (E+, 500 mg RRR-α-tocopheryl acetate/kg diet), were spawned to obtain E- and E+ embryos that we evaluated using metabolomics and specific lipid analyses (each measure at 24, 48, 72, 120 hours-post-fertilization, hpf), neurobehavioral development (locomotor responses at 96 hpf), and rescue strategies...
April 2017: Data in Brief
https://www.readbyqxmd.com/read/28278125/laboratory-validation-of-an-lc-ms-ms-method-for-the-detection-of-ractopamine-clenbuterol-and-salbutamol-in-bovine-and-swine-muscle-at-sub-%C3%AE-g-kg-regulatory-limits
#9
Rodrigo H M M Granja, Karine V G Reche, Fabio M Giannotti, João K G de Souza, Sarita P G Ferrari, André Danioti Dos Santos, Amarylis C B A Wanschel, Alessandro G Salerno
Ractopamine (RAC), is a β-adrenergic agonist increasingly used in the swine and cattle industry. This compound redirects nutrients to favor leanness rather than fat deposition, improves growth and carcass traits gaining higher economic benefit to producers. Countries around the world are split over whether to allow the use of RAC, in meat production. Clenbuterol (CLB) and Salbutamol (SLB) are anillinic and phenolic β-agonists, respectively, with the same capacity of producing economic benefits for the meat sector...
February 28, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28274007/facial-dysmorphism-an-unreported-teratogenicity-with-levetiracetam
#10
Jyotsana Gupta, Sandhya Jain, Shalini Rajaram, Neerja Goel, Bindiya Gupta
Levetiracetam (LEV) is a relatively newer anticonvulsant drug used to treat epilepsy and is approved by United States Food and Drugs Administration (USFDA). The drug binds to a synaptic vesicle glycoprotein and inhibits presynaptic calcium channels, thus reducing neurotransmitter release. Commonly reported side effects include drowsiness, weakness, unsteady gait, mood changes and loss of appetite. Like most other antiepileptics, it is a Category C drug in pregnancy. We report the first case of facial dysmorphism in the neonate of a mother taking LEV antenatally...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28272603/quantitative-detection-of-codeine-in-human-plasma-using-surface-enhanced-raman-scattering-via-adaptation-of-the-isotopic-labelling-principle
#11
Abdu Subaihi, Howbeer Muhamadali, Shaun T Mutter, Ewan Blanch, David I Ellis, Royston Goodacre
In this study surface enhanced Raman scattering (SERS) combined with the isotopic labelling (IL) principle has been used for the quantification of codeine spiked into both water and human plasma. Multivariate statistical approaches were employed for the analysis of these SERS spectral data, particularly partial least squares regression (PLSR) which was used to generate models using the full SERS spectral data for quantification of codeine with, and without, an internal isotopic labelled standard. The PLSR models provided accurate codeine quantification in water and human plasma with high prediction accuracy (Q(2))...
March 8, 2017: Analyst
https://www.readbyqxmd.com/read/28272300/a-human-antibody-that-binds-to-the-sixth-ig-like-domain-of-vcam-1-blocks-lung-cancer-cell-migration-in-vitro
#12
Mi Ra Kim, Ji Hye Jang, Chang Sik Park, Taek-Keun Kim, Youn-Jae Kim, Junho Chung, Hyunbo Shim, In Hyun Nam, Jung Min Han, Sukmook Lee
Vascular cell adhesion molecule-1 (VCAM-1) is closely associated with tumor progression and metastasis. However, the relevance and role of VCAM-1 in lung cancer have not been clearly elucidated. In this study, we found that VCAM-1 was highly overexpressed in lung cancer tissue compared with that of normal lung tissue, and high VCAM-1 expression correlated with poor survival in lung cancer patients. VCAM-1 knockdown reduced migration of A549 human lung cancer cells into Matrigel, and competitive blocking experiments targeting the Ig-like domain 6 of VCAM-1 (VCAM-1-D6) demonstrated that the VCAM-1-D6 domain was critical for VCAM-1 mediated A549 cell migration into Matrigel...
March 6, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28253619/determination-of-peroxide-explosive-tatp-and-related-compounds-by-dielectric-barrier-discharge-ionization-mass-spectrometry-dbdi-ms
#13
Sebastian Hagenhoff, Joachim Franzke, Heiko Hayen
Dielectric barrier discharge ionization-mass spectrometry (DBDI-MS), which is based on the use of a low temperature helium plasma as ionization source, is used for the determination of trace amounts of triacetone triperoxide (TATP) and its homologue diacetone diperoxide (DADP) from surfaces. TATP is observed as [M+NH4](+) adduct, whereas DADP is observed as [M+O+NH4](+). Measurement of DADP with varying deuteration degrees (DADP, DADP-d6 and DADP-d12) indicates that DADP undergoes oxidation when ionized by DBDI...
March 3, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28253437/simple-and-fast-sample-preparation-followed-by-gas-chromatography-tandem-mass-spectrometry-gc-ms-ms-for-the-analysis-of-2-and-4-methylimidazole-in-cola-and-dark-beer
#14
Sol Ji Choi, Mun Yhung Jung
We have developed a simple and fast sample preparation technique in combination with a gas chromatography-tandem mass spectrometry (GC-MS/MS) for the quantification of 2-methylimidazole (2-MeI) and 4-methylimidazole (4-MeI) in colas and dark beers. Conventional sample preparation technique for GC-MS requires laborious and time-consuming steps consisting of sample concentration, pH adjustment, ion pair extraction, centrifugation, back-extraction, centrifugation, derivatization, and extraction. Our sample preparation technique consists of only 2 steps (in situ derivation and extraction) which requires less than 3 min...
March 2, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28250867/new-triterpenoidal-saponins-from-koelreuteria-paniculata
#15
Ahmad E Mostafa, Atef A El-Hela, Abd-Elsalam I Mohammad, Stephen J Cutler, Samir A Ross
Bioassay guided fractionation and chemical investigation of the ethanolic extract of the aerial parts of Koelreuteria paniculata Laxm. (Sapindaceae), resulted in the isolation and identification of three new triterpenoid saponins 1-3 named Paniculatosoid A-C, along with eleven known compounds. The structures of the isolated compounds were elucidated using 1D and 2D NMR experiments, HRESIMS, and comparison with literature data. The occurrence of tridesmosidic saponin is reported for the first time from family Sapindaceae, as well as it is rarely found in natural saponins...
September 2016: Phytochemistry Letters
https://www.readbyqxmd.com/read/28245583/antimalarials-with-benzothiophene-moieties-as-aminoquinoline-partners
#16
Jelena Konstantinović, Milica Videnović, Jelena Srbljanović, Olgica Djurković-Djaković, Katarina Bogojević, Richard Sciotti, Bogdan Šolaja
Malaria is a severe and life-threatening disease caused by Plasmodium parasites that are spread to humans through bites of infected Anopheles mosquitoes. Here, we report on the efficacy of aminoquinolines coupled to benzothiophene and thiophene rings in inhibiting Plasmodium falciparum parasite growth. Synthesized compounds were evaluated for their antimalarial activity and toxicity, in vitro and in mice. Benzothiophenes presented in this paper showed improved activities against a chloroquine susceptible (CQS) strain, with potencies of IC50 = 6 nM, and cured 5/5 Plasmodium berghei infected mice when dosed orally at 160 mg/kg/day × 3 days...
February 24, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28218535/sulfur-groups-improve-the-performance-of-triazole-and-triazolium-based-interaction-units-in-anion-binding
#17
Mónica Álvarez-Pérez, Marina Velado, Diego García-Puentes, Elena Sáez, Cristina Vicent, Roberto Fernández de la Pradilla, Alma Viso, María C de la Torre, Miguel A Sierra
An NMR comparative study of 1,2,3-triazole and triazolium anion recognition units containing sulfoxide, sulfone, and sulfoximine groups at C4 unveils an enhancement in binding ability up to ≈1 kcal/mol in acetone-d6 correlated with a theoretical increase of H5 acidity. DFT calculations provide insight into binding modes in line with experimental data for these receptors.
February 24, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28216999/solution-and-structural-binding-studies-of-phosphate-with-thiophene-based-azamacrocycles
#18
Syed A Haque, Rainier S Berkley, Frank R Fronczek, Md Alamgir Hossain
Two thiophene-based monocyclic receptors L1 and L2 have been studied for phosphate binding in solutions (D2O and DMSO-d6 ) by (1)H NMR and (31)P NMR titrations, and in the solid state by single crystal X-ray analysis. Results from (1)H NMR titrations suggest that the ligands bind phosphate anions in a 1:2 binding mode in DMSO-d6 , with the binding constants of 5.25 and 4.20 (in log K), respectively. The binding of phosphate to L1 and L2 was further supported by (31)P NMR in D2O at pH = 5.2. The crystal structure of the phosphate complex of L1 reveals unambiguous proof for the formation of a ditopic complex via multiple hydrogen bonds from NH···O and CH···O interactions...
August 2016: Inorganic Chemistry Communications
https://www.readbyqxmd.com/read/28215453/beef-heifers-with-diminished-numbers-of-antral-follicles-have-decreased-uterine-protein-concentrations
#19
Anthony K McNeel, Émerson M Soares, Allyson L Patterson, Jeffrey L Vallet, Elane C Wright, Erin L Larimore, Olivia L Amundson, Jeremy R Miles, Chadwick C Chase, Clay A Lents, Jennifer R Wood, Andrea S Cupp, George A Perry, Robert A Cushman
Previous research demonstrated a favorable relationship between the number of follicles detectable in the bovine ovary by ultrasonography and fertility, and bovine females with diminished numbers of antral follicles had smaller reproductive tracts. Therefore, we hypothesized that uterine function would be compromised in beef heifers with diminished numbers of antral follilcles. Angus heifers (n=480) were submitted for ultrasonographic evaluation of antral follicle number at 325 and 355d of age. After the second ultrasonographic examination, 40 pubertal heifers with the greatest average number of antral follicles (30...
April 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28209985/ig-like-domain-6-of-vcam-1-is-a-potential-therapeutic-target-in-tnf%C3%AE-induced-angiogenesis
#20
Taek-Keun Kim, Chang Sik Park, Hee-Jun Na, Kangseung Lee, Aerin Yoon, Junho Chung, Sukmook Lee
Tumor necrosis factor alpha (TNFα)-induced angiogenesis plays important roles in the progression of various diseases, including cancer, wet age-related macular degeneration, and rheumatoid arthritis. However, the relevance and role of vascular cell adhesion molecule-1 (VCAM-1) in angiogenesis have not yet been clearly elucidated. In this study, VCAM-1 knockdown shows VCAM-1 involvement in TNFα-induced angiogenesis. Through competitive blocking experiments with VCAM-1 Ig-like domain 6 (VCAM-1-D6) protein, we identified VCAM-1-D6 as a key domain regulating TNFα-induced vascular tube formation...
February 17, 2017: Experimental & Molecular Medicine
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