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https://www.readbyqxmd.com/read/28640753/mechanism-of-antihypertensive-effect-of-mucuna-pruriens-l-seed-extract-and-its-isolated-compounds
#1
Mohammad Yaseen Khan, Vimal Kumar
Background In the search of safe and effective lead molecules from natural sources, Mucuna pruriens (MP) L. (Fabaceae) seeds were utilized for exploring the antihypertensive potential. Traditionally, it is used as diuretic and hypotensive. Methods Bioassay-guided fractions were utilized for the isolation of active compounds by column chromatography. IC50 value, enzyme kinetics and inhibition mechanism were determined. In vivo time and dose-dependent hypotensive study followed by changes in mean arterial pressure (MAP) induced by angiotensin I (3 nmol/kg), angiotensin II (3 nmol/kg), and bradykinin (10 nmol/kg) in anesthetized rats was done...
June 21, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/28635382/white-cell-and-platelet-content-affects-the-release-of-bioactive-factors-in-different-blood-derived-scaffolds
#2
S Cabaro, V D'Esposito, R Gasparro, F Borriello, F Granata, G Mosca, F Passaretti, J C Sammartino, F Riccitiello, F Beguinot, P Formisano, G Sammartino
Platelet-derived factors are biomaterials that might accelerate healing process in oral, maxillofacial, and several other applications. Release of specific factors by platelet concentrates is critical to achieving a successful outcome. Here, we have shown that platelet-rich fibrin (PRF) clots were beneficial sources of leukocytes, which may directly affect the release of chemokines and growth factors. When compared with the standard leukocyte-PRF (L-PRF), the experimental low-force modified procedure [defined as advanced-PRF (A-PRF)] entrapped the same content of viable leukocytes, released a similar amount of inflammatory cytokines, but secreted 3-, 1...
June 21, 2017: Platelets
https://www.readbyqxmd.com/read/28634378/compact-acceleration-of-energetic-neutral-atoms-using-high-intensity-laser-solid-interaction
#3
Malay Dalui, T Madhu Trivikram, James Colgan, John Pasley, M Krishnamurthy
Recent advances in high-intensity laser-produced plasmas have demonstrated their potential as compact charge particle accelerators. Unlike conventional accelerators, transient quasi-static charge separation acceleration fields in laser produced plasmas are highly localized and orders of magnitude larger. Manipulating these ion accelerators, to convert the fast ions to neutral atoms with little change in momentum, transform these to a bright source of MeV atoms. The emittance of the neutral atom beam would be similar to that expected for an ion beam...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28632178/an-increased-dietary-supply-of-medium-chain-fatty-acids-during-early-weaning-in-rodents-prevents-excessive-fat-accumulation-in-adulthood
#4
Bert J M van de Heijning, Annemarie Oosting, Diane Kegler, Eline M van der Beek
Medium-chain fatty acids (MCFA) are a directly and readily absorbed source of energy. Exposure early-in-life to increased MCFA levels might affect development and impact (lipid) metabolism later in life. We tested whether an increased MCFA intake early-in-life positively affects adult body composition and metabolic status when challenged by a western-style diet (WSD). Male offspring of C57Bl/6j mice and Wistar rats were fed a control diet (CTRL; 10 w% fat, 14% MCFA) or a medium-chain triglycerides (MCT) diet with 20% MCFA until postnatal (PN) day 42, whereupon animals were fed a WSD (10 w% fat) until PN day 98...
June 20, 2017: Nutrients
https://www.readbyqxmd.com/read/28631113/fast-determination-of-ingredients-in-solid-pharmaceuticals-by-microwave-enhanced-in-source-decay-of-microwave-plasma-torch-mass-spectrometry
#5
Rui Su, Xinchen Wang, Changming Hou, Meiling Yang, Keke Huang, Huanwen Chen
Rapid qualitative and quantitative analysis of solid samples (e.g., pharmaceutical preparations) by using a small and low-resolution mass spectrometer without MS/MS function is still a challenge in ambient pressure ionization mass spectrometric analysis. Herein, a practically efficient method termed microwave-enhanced in-source decay (MEISD) using microwave plasma torch desorption ionization coupled with time-of-flight mass spectrometry (MPTDI-TOF MS) was developed for fast analysis of pharmaceutical tablets using a miniature TOF mass spectrometer without tandem mass function...
June 19, 2017: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/28629341/protective-effects-of-cynara-scolymus-leaves-extract-on-metabolic-disorders-and-oxidative-stress-in-alloxan-diabetic-rats
#6
Maryem Ben Salem, Rihab Ben Abdallah Kolsi, Raouia Dhouibi, Kamilia Ksouda, Slim Charfi, Mahdi Yaich, Serria Hammami, Zouheir Sahnoun, Khaled Mounir Zeghal, Kamel Jamoussi, Hanen Affes
BACKGROUND: Diabetes mellitus (DM) is associated with hyperglycemia, inflammatory disorders and abnormal lipid profiles, currently the extracts from leaves of cynara scolymus has been discovered to treat metabolic disorders and has been stated by multitudinous scientists according to a good source of polyphenols compounds. The present study aimed to evaluate the protective effect of the ethanol leaves extract of C. scolymus in alloxan induced stress oxidant, hepatic-kidney dysfunction and histological changes in liver, kidney and pancreas of different experimental groups of rats...
June 19, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28628837/the-influence-of-essential-oils-from-xiang-fu-si-wu-decoction-on-its-non-volatile-components-and-its-application-for-pharmacokinetics-in-normal-rats
#7
Ying Pan, Dawei Qian, Pei Liu, Yang Zhang, Zhenhua Zhu, Li Zhang, Jin-Ao Duan
Xiang-Fu-Si-Wu Decoction (XFSWD) has been used to treat gynecology diseases in clinical practice for hundreds of years in China, especially for primary dysmenorrheal of QiZhi Type. In previous researches, both essential oils (XEO) and non-volatile components (NXEO) extracted from XFSWD showed significant pharmacological activities, but the influence of XEO on NXEO was unclear. The purpose of this paper was to develop a validated analytical method for simultaneous determination of ten components including Vanillic acid, Ferulic acid, Caffeic acid, Gallic acid, Paeoniflorin, Albiflorin, Tetrahydropalmatine, Protopine, Berberine and Tetrahydrocolumbamine, and to compare the pharmacokinetic parameters of these components to illustrate the influences of XEO on NXEO in normal rats...
June 4, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28623851/quantification-of-%C3%AE-eudesmol-in-rat-plasma-using-lc-ms-ms-and-its-application-to-a-pharmacokinetic-study
#8
Ligang Jiang, Chunyang Zhang, Haiping Li
A sensitive and specific LC-MS/MS assay for determination of β-eudesmol in rat plasma was developed and validated. After liquid-liquid extraction with ethyl ether, the analyte and IS were separated on a Capcell Pak C18 column (50 × 2.0 mm, 5 μm) by isocratic elution with acetonitrile-water-formic acid (77.5:22.5:0.1, v/v/v) as the mobile phase at a flow rate of 0.4 mL/min. An ESI source was applied and operated in positive ion mode; selected reaction monitoring (SRM) scan was used for quantification by monitoring the precursor-product ion transitions of m/z 245...
June 17, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28623536/comparison-of-fungicidal-properties-of-non-thermal-plasma-produced-by-corona-discharge-and-dielectric-barrier-discharge
#9
J Julák, H Soušková, V Scholtz, E Kvasničková, D Savická, V Kříha
The inactivation of four micromycete species by action of non-thermal plasma was followed. Two sources of plasma were compared, namely, positive corona discharge and dielectric barrier discharge. The corona discharge appeared as suitable for fungal spore inactivation in water suspension, whereas the barrier discharge inactivated spores on the surface of cultivation agar. Cladosporium sphaerospermum was the most sensitive, being inactivated within 10 min of exposure to plasma, whereas Aspergillus oryzae displayed decrease in viable cell count only, the complete inactivation was not achieved even after 40 min of exposure...
June 17, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28622951/population-approach-to-efavirenz-therapy
#10
Hélder Duarte, João Paulo Cruz, Natália Aniceto, Ana Clara Ribeiro, Ana Fernandes, Paulo Paixão, Francisco Antunes, José Morais
Efavirenz (EFV) is a non-nucleoside reverse transcriptase inhibitor commonly used as first line therapy in the treatment of human immunodeficiency virus, with a narrow therapeutic range and a high between-subject variability which can lead to central nervous system toxicity or therapeutic failure. To characterize the sources of variability and better predict EFV steady state plasma concentrations, a population pharmacokinetic model was developed form 96 HIV positive individuals, using a nonlinear mixed effect method with Monolix® software...
June 13, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28622621/development-of-an-ultra-fast-liquid-chromatography-tandem-mass-spectrometry-method-for-simultaneous-determination-of-seven-flavonoids-in-rat-plasma-application-to-a-comparative-pharmacokinetic-investigation-of-ginkgo-biloba-extract-and-single-pure-ginkgo-flavonoids
#11
Tianyang Wang, Jie Xiao, Huiping Hou, Pei Li, Ziyue Yuan, Huarong Xu, Ran Liu, Qing Li, Kaishun Bi
For deeper pharmacokinetic investigation and further curative application of ginkgo flavonoids, a delicate, efficient and precise UFLC-MS/MS technique for synchronous quantitation of seven flavonoids, apigenin, luteolin, naringenin, quercetin, diosmetin, kaempferol and isorhamnetin in rat plasma has been established. After mixing with the internal standard (IS) linarin, bio-samples were pretreated via ethyl acetate for liquid-liquid extraction, then isolated at 0.2ml/min flow rate on a Venusil MP C18 chromatographic column (100mm×2...
May 30, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28621999/laboratory-observation-of-a-plasma-flow-state-transition-from-diverging-to-stretching-a-magnetic-nozzle
#12
Kazunori Takahashi, Akira Ando
An axial magnetic field induced by a plasma flow in a divergent magnetic nozzle is measured when injecting the plasma flow from a radio frequency (rf) plasma source located upstream of the nozzle. The source is operated with a pulsed rf power of 5 kW, and the high density plasma flow is sustained only for the initial ∼100  μsec of the discharge. The measurement shows a decrease in the axial magnetic field near the source exit, whereas an increase in the field is detected at the downstream side of the magnetic nozzle...
June 2, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28619060/incidence-disease-onset-and-short-term-outcome-in-urea-cycle-disorders-cross-border-surveillance-in-germany-austria-and-switzerland
#13
Susanne Nettesheim, Stefan Kölker, Daniela Karall, Johannes Häberle, Roland Posset, Georg F Hoffmann, Beate Heinrich, Florian Gleich, Sven F Garbade
BACKGROUND: Urea cycle disorders (UCDs) are a group of rare inherited metabolic disorders. Affected individuals often present with hyperammonemic encephalopathy (HE) and have an increased risk of severe neurologic disease and early death. The study aims to provide epidemiologic data and to describe the disease manifestation and short-term outcome. METHOD: Cross-border surveillance of newly diagnosed patients with UCDs - below 16 years of age - was performed from July 2012 to June 2015 in Germany and Austria and from January 2012 to December 2015 in Switzerland...
June 15, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28615940/killing-malignant-melanoma-cells-with-protoporphyrin-ix-loaded-polymersome-mediated-photodynamic-therapy-and-cold-atmospheric-plasma
#14
Mian Wang, Benjamin M Geilich, Michael Keidar, Thomas J Webster
Traditional cancer treatments contain several limitations such as incomplete ablation and multidrug resistance. It is known that photodynamic therapy (PDT) is an effective treatment for several tumor types especially melanoma cells. During the PDT process, protoporphyrin IX (PpIX), an effective photosensitizer, can selectively kill cancer cells by activating a special light source. When tumor cells encapsulate a photosensitizer, they can be easily excited into an excited state by a light source. In this study, cold atmospheric plasma (CAP) was used as a novel light source...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28615939/effect-of-carbon-ion-implantation-on-the-tribology-of-metal-on-metal-bearings-for-artificial-joints
#15
Hironobu Koseki, Masato Tomita, Akihiko Yonekura, Takashi Higuchi, Sinya Sunagawa, Koumei Baba, Makoto Osaki
Metal-on-metal (MoM) bearings have become popular due to a major advantage over metal-on-polymer bearings for total hip arthroplasty in that the larger femoral head and hydrodynamic lubrication of the former reduce the rate of wear. However, concerns remain regarding adverse reactions to metal debris including metallosis caused by metal wear generated at the taper-head interface and another modular junction. Our group has hypothesized that carbon ion implantation (CII) may improve metal wear properties. The purpose of this study was to investigate the wear properties and friction coefficients of CII surfaces with an aim to ultimately apply these surfaces to MoM bearings in artificial joints...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28611756/pathogenic-leptospira-secreted-proteases-target-the-membrane-attack-complex-a-potential-role-for-thermolysin-in-complement-inhibition
#16
Thais A Amamura, Tatiana R Fraga, Sílvio A Vasconcellos, Angela S Barbosa, Lourdes Isaac
Leptospirosis is a zoonosis caused by spirochetes from the genus Leptospira. This disease is common in tropical and subtropical areas, constituting a serious public health problem. Pathogenic Leptospira have the ability to escape the human Complement System, being able to survive when in contact with normal human serum. In a previous study, our group demonstrated that supernatants of pathogenic Leptospira (SPL) inhibit the three activation pathways of the Complement System. This inhibition can be directly correlated with the activity of secreted proteases, which cleave the Complement molecules C3, Factor B (Alternative Pathway), C4 and C2 (Classical and Lectin Pathways)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28611011/application-of-plasma-genotyping-technologies-in-non-small-cell-lung-cancer-a-practical-review
#17
REVIEW
Adrian G Sacher, Kimberly M Komatsubara, Geoffrey R Oxnard
The rational treatment of metastatic NSCLC hinges upon the timely detection of potentially targetable genomic alterations in order to guide therapy. Recent advances in highly sensitive genotyping technologies have allowed for the development of novel plasma genotyping assays which are capable of noninvasively detecting targetable alterations in plasma cell-free DNA without reliance on traditional tissue genotyping. The rapid development of plasma genotyping has led to an explosion in the number of assay platforms available from both commercial and laboratory sources...
June 10, 2017: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/28607507/urinary-lipidomics-evidence-for-multiple-sources-and-sexual-dimorphism-in-healthy-individuals
#18
J Graessler, C S Mehnert, K-M Schulte, S Bergmann, S Strauss, T D Bornstein, J Licinio, M-L Wong, A L Birkenfeld, S R Bornstein
Urinary lipidomics may add new valuable biomarkers to the diagnostic armamentarium for early detection of metabolic and kidney diseases. Sources and composition of urinary lipids in healthy individuals, however, have not been investigated in detail. Shotgun lipidomics was used to quantify lipidomic profiles in native urine samples from 16 individuals (eight men, eight women) collected in five fractions over 24 h. All probands were comprehensively characterized by urinary and clinical indices. The mean total urinary lipid concentration per sample was 0...
June 13, 2017: Pharmacogenomics Journal
https://www.readbyqxmd.com/read/28605281/re-plasminogen-activator-inhibitor-1-and-pericardial-fat-in-individuals-with-type-2-diabetes-mellitus-by-bayomi-et-al-metab-syndr-relat-disord-doi-10-1089-met-2017-0031
#19
Angelo Avogaro
Plasminogen activator inhibitor-1 (PAI-1) is a member of the serine protease inhibitor (serpin) superfamily, which inactivates tissue plasminogen activator (tPA); therefore, increased level of PAI-1 antigen counteracts the anticoagulant effect of tPA and facilitates the fibrin clot formation. Plasma PAI-1 antigen and activity levels are associated with increased body mass index and with features of the insulin resistance syndrome like obesity and diabetes. Visceral adipose tissue produces more PAI-1 than subcutaneous adipose tissue: This increased production of PAI-1 from the visceral adipose tissue is one important link between visceral obesity and cardiovascular disease...
June 12, 2017: Metabolic Syndrome and related Disorders
https://www.readbyqxmd.com/read/28604177/evaluation-of-trace-elements-in-potatoes-solanum-tuberosum-from-a-suburban-area-of-naples-italy-the-triangle-of-death
#20
Antonella De Roma, Maria Cesarina Abete, Paola Brizio, Giuseppe Picazio, Marcello Caiazzo, Jacopo Luigi D'auria, Mauro Esposito
Human exposure to contaminated food is a general health concern worldwide; it is necessary to evaluate food safety with respect to contaminants present in the edible parts of major food crops. This study evaluated the concentrations of 17 trace elements (As, Be, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Sb, Se, Sn, Tl, V, and Zn) from 51 potato plantations in the Campania region, inside the area known as the "Triangle of Death," with inductively coupled plasma mass spectrometry analysis. Results confirm that the potatoes collected from the suburban area of Naples contained concentrations of trace elements below the safe limits prescribed by the Food and Agriculture Organization of the United Nations and the World Health Organization...
June 12, 2017: Journal of Food Protection
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