keyword
MENU ▼
Read by QxMD icon Read
search

ABTS

keyword
https://www.readbyqxmd.com/read/29334254/antioxidant-and-anti-proliferative-properties-of-extracts-from-heterotrophic-cultures-of-galdieria-sulphuraria
#1
Claudia Bottone, Rosa Camerlingo, Roberta Miceli, Giovanna Salbitani, Giuseppe Sessa, Giuseppe Pirozzi, Simona Carfagna
This study explores the possibility to use the extremophilic microalga Galdieria sulphuraria (strain 064) as a source of natural biomolecules with beneficial and protective effects on human health. Galdieria was cultivated in heterotrophy conditions and cells extracts for their antioxidant and anti-proliferative properties were tested. Galdieria extracts showed high antioxidant power tested through ABTS assay and revealed high glutathione and phycocyanin contents. Based on Annexin-V FITC/propidium iodide and MTT analysis, algae extracts inhibited the proliferation of human adenocarcinoma A549 cells (51...
January 15, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29333386/antioxidant-and-anti-adipogenic-activities-of-trapa-japonica-shell-extract-cultivated-in-korea
#2
DooJin Lee, Ok-Hwan Lee, Geunpyo Choi, Jong Dai Kim
Trapa japonica shell contains phenolic compounds such as tannins. Studies regarding the antioxidant and anti-adipogenic effects of Trapa japonica shell cultivated in Korea are still unclear. Antioxidant and anti-adipogenic activities were measured by in vitro assays such as 2,2-diphenyl-1-picrylhydrazy (DPPH) radical scavenging activity, 2,2'-azinobis( 3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) radical scavenging activity, ferric reducing ability of plasma assay, reducing power, superoxide dismutase-like activity, and iron chelating ability in 3T3-L1 cells...
December 2017: Preventive Nutrition and Food Science
https://www.readbyqxmd.com/read/29333382/antioxidant-and-quinone-reductase-activity-of-soyasaponins-in-hepa1c1c7-mouse-hepatocarcinoma-cells
#3
Eun-Sun Hwang
Saponins have been reported to possess several health beneficial activities including hypocholesterolemic, immune-stimulatory, and anticarcinogenic. The objectives of this study were to determine if soysaponins are radical scavengers and inducers of quinone reductase (QR) activity in Hepa1c1c7 murine hepatoma cell line. The antioxidant capacity of soyasaponin was evaluated using the 1,1'-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) radical scavenging methods...
December 2017: Preventive Nutrition and Food Science
https://www.readbyqxmd.com/read/29332828/uplc-ms-ms-analysis-for-antioxidant-components-of-lycii-fructus-based-on-spectrum-effect-relationship
#4
Xian-Fei Zhang, Juan Chen, Jun-Li Yang, Yan-Ping Shi
Lycii Fructus is widely cultivated in the Northwest China. It is well-known for its antiaging effect in traditional Chinese medicines (TCMs), but the effective components are not clear. In this work, the ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) was used to study the antioxidant components of Lycii Fructus through analyzing the spectrum-effect relationship, and the positive correlation components with antioxidant activity were partially identified. The extractums of Lycii Fructus were adsorbed with macroporous resin, and then eluted with water and 30%, 60%, 90% ethanol in turn...
April 1, 2018: Talanta
https://www.readbyqxmd.com/read/29332255/profiling-attention-and-cognition-enhancing-drugs-in-a-rat-touchscreen-based-continuous-performance-test
#5
Zhiyong Ding, Jordan W Brown, Lynne E Rueter, Eric G Mohler
RATIONALE: A novel rodent continuous performance test (CPT) was developed as one of the goals of the NEWMEDS (Novel Methods leading to New Medications in Depression and Schizophrenia) consortium to improve its translatability to the CPT test used in human subjects. OBJECTIVES: The objective of the study is to investigate the effects of attention and cognition enhancing drugs in rodent CPT. METHODS: A single cohort of rats were trained to asymptotic performance in the test...
January 13, 2018: Psychopharmacology
https://www.readbyqxmd.com/read/29331819/new-strategy-for-determination-of-anthocyanins-polyphenols-and-antioxidant-capacity-of-brassica-oleracea-liquid-extract-using-infrared-spectroscopies-and-multivariate-regression
#6
Isadora R N de Oliveira, Jussara V Roque, Mariza P Maia, Paulo C Stringheta, Reinaldo F Teófilo
A new method was developed to determine the antioxidant properties of red cabbage extract (Brassica oleracea) by mid (MID) and near (NIR) infrared spectroscopies and partial least squares (PLS) regression. A 70% (v/v) ethanolic extract of red cabbage was concentrated to 9° Brix and further diluted (12 to 100%) in water. The dilutions were used as external standards for the building of PLS models. For the first time, this strategy was applied for building multivariate regression models. Reference analyses and spectral data were obtained from diluted extracts...
January 4, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29331528/expression-of-a-thermotolerant-laccase-from-pycnoporus-sanguineus-in-trichoderma-reesei-and-its-application-in-the-degradation-of-bisphenol-a
#7
Jie Zhao, Shenquan Zeng, Ying Xia, Liming Xia
The laccase gene from Pycnoporus sanguineus was cloned and inserted between the strong Pcbh1 promoter and the Tcbh1 terminator from Trichoderma reesei to form the recombinant plasmid pCH-lac. Using Agrobacterium-mediated technique, the pCH-lac was integrated into the chromosomes of T. reesei. Twenty positive transformants were obtained by employing hygromycin B as a selective agent. PCR was used to confirm that the laccase gene was integrated into the chromosomal DNA of T. reesei. Laccase production by recombinant transformants was performed in shaking flasks, and the activity of laccase reached 8...
January 10, 2018: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/29329851/chemical-characterization-of-myrciaria-floribunda-h-west-ex-willd-fruit
#8
Luciana Mouta de Oliveira, Alexandre Porte, Ronoel Luiz de Oliveira Godoy, Marcelo da Costa Souza, Sidney Pacheco, Manuela Cristina Pessanha de Araujo Santiago, Ana Cristina Miranda Senna Gouvêa, Luzimar da Silva de Mattos do Nascimento, Renata Galhardo Borguini
M. floribunda fruit was studied to characterize its chemical composition. The chemical composition, bioactive compounds, antioxidant activity and volatiles of the fruit were determined. The chemical composition was determined according to AOAC and AOCS, the bioactive compounds by HPLC, the volatiles by GCMS and the antioxidant activity by ABTS+ and DPPH methods. The chemical composition of the freeze-dried fruit was 1.89 g·100 g-1, 2.43 g·100 g-1, 4.78 g·100 g-1 and 90.89 g·100 g-1 of ashes, lipids, proteins and total carbohydrates on a dry base, respectively...
May 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29329229/chemical-composition-and-evaluation-of-the-biological-properties-of-the-essential-oil-of-the-dietary-phytochemical-lippia-citriodora
#9
Eleni Fitsiou, Gregoria Mitropoulou, Katerina Spyridopoulou, Manolis Vamvakias, Haido Bardouki, Alex Galanis, Katerina Chlichlia, Yiannis Kourkoutas, Mihalis Ι Panayiotidis, Aglaia Pappa
The aim of the study was to characterize the chemical composition and biological properties of the essential oil from the plant Lippia citriodora grown in Greece. The essential oil volatiles were analyzed by gas chromatography-mass spectrometry GC-MS indicating citral as the major component. Τhe antimicrobial properties were assayed using the disk diffusion method and the minimum inhibitory and non-inhibitory concentration values were determined. Listeria monocytogenes, Staphylococcus epidermidis, Staphylococcus aureus, Saccharomyces cerevisiae, and Aspergillus niger were sensitive to Lippia citriodora oil, but not Escherichia coli, Salmonella Enteritidis, Salmonella typhimurium, and Pseudomonas fragi...
January 12, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29324642/antibacterial-and-antioxidant-capacities-and-attenuation-of-lipid-accumulation-in-3t3-l1-adipocytes-by-low-molecular-weight-fucoidans-prepared-from-compressional-puffing-pretreated-sargassum-crassifolium
#10
Chun-Yung Huang, Chia-Hung Kuo, Chia-Hsin Lee
In this study, we extracted fucoidan from compressional-puffing-pretreated Sargassum crassifolium by hot water. The crude extract of fucoidan (SC) was degraded by various degradation reagents and four low-molecular-weight (LMW) fucoidans, namely SCO (degradation by hydrogen peroxide), SCA (degradation by ascorbic acid), SCOA (degradation by hydrogen peroxide + ascorbic acid), and SCH (degradation by hydrogen chloride) were obtained. The degradation reagents studied could effectively degrade fucoidan into LMW fucoidans, as revealed by intrinsic viscosity, agarose gel electrophoresis, and molecular weight analyses...
January 11, 2018: Marine Drugs
https://www.readbyqxmd.com/read/29323189/il-13-in-lps-induced-inflammation-causes-bcl-2-expression-to-sustain-hyperplastic-mucous-cells
#11
Hitendra S Chand, Jennifer F Harris, Yohannes Tesfaigzi
Exposure to lipopolysaccharides (LPS) causes extensive neutrophilic inflammation in the airways followed by mucous cell hyperplasia (MCH) that is sustained by the anti-apoptotic protein, Bcl-2. To identify inflammatory factor(s) that are responsible for Bcl-2 expression, we established an organ culture system consisting of airway epithelial tissue from the rat nasal midseptum. The highest Muc5AC and Bcl-2 expression was observed when organ cultures were treated with brochoalveolar lavage (BAL) fluid harvested from rats 10 h post LPS instillation...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29322144/structure-gelation-and-antioxidant-properties-of-curcumin-doped-casein-micelle-powder-produced-by-spray-drying
#12
Aya N Khanji, Florentin Michaux, Jeremy Petit, Dominique Salameh, Toufic Rizk, Jordane Jasniewski, Sylvie Banon
The encapsulation of curcumin in micellar caseins (MCs) and the production of powder were performed by spray-drying. Nearly 97% of the curcumin was retained and the yellow powder showed a typical high casein powder morphology. The hygroscopic properties were determined, slight differences reflected less available hydrophobic sites when curcumin was bound to casein, favoring interactions with water in curcumin-enriched MC powders. No difference was detected on the internal MC structure via SAXS. The antioxidant activity of doped-curcumin powder presented 88% of active curcumin...
January 11, 2018: Food & Function
https://www.readbyqxmd.com/read/29322134/label-free-detection-of-fibrinogen-based-on-the-fibrinogen-enhanced-peroxidase-activity-of-a-fibrinogen-hemin-composite
#13
Tingting Hou, Yuanfu Zhang, Tao Wu, Meifeng Wang, Yinghong Zhang, Rui Li, Lei Wang, Qingwang Xue, Shuhao Wang
A simple, label-free colorimetric method for the determination of fibrinogen (Fib) in plasma is presented. In this work, it was observed that Fib interacted with hemin to form a hemin-Fib composite. Because Fib prevented hemin from the formation of m-oxo-dimers, the hemin-Fib composite possesses excellent peroxidase-like activity. Importantly, the peroxidase-like activity of Fib-hemin increased with the increase in the Fib. This allows us to utilize the H2O2-ABTS colorimetric system for the quantitative analysis of Fib...
January 11, 2018: Analyst
https://www.readbyqxmd.com/read/29319629/patterns-of-discordance-between-pretransplant-imaging-stage-of-hepatocellular-carcinoma-and-posttransplant-pathologic-stage-a-contemporary-appraisal-of-the-milan-criteria
#14
Brett L Ecker, Maarouf A Hoteit, Kimberly A Forde, Christine C Hsu, K Rajender Reddy, Emma E Furth, Evan S Siegelman, Peiman Habibollahi, Edgar Ben-Josef, Paige M Porrett, Peter L Abt, Abraham Shaked, Kim M Olthoff, Matthew H Levine
BACKGROUND: Patients with hepatocellular carcinoma (HCC) exceeding Milan criteria on explant pathology are at increased risk of recurrence and death. Discordance between contemporary magnetic resonance imaging (MRI) and explant pathology, and preoperative characteristics predictive of discordance are not well understood. METHODS: Patients who underwent orthotopic liver transplantation (OLT) for HCC following preoperative MRI were identified in a prospectively collected institutional database (1/2003-12/2013)...
January 10, 2018: Transplantation
https://www.readbyqxmd.com/read/29316691/a-comparative-study-on-phytochemical-profiles-and-biological-activities-of-sclerocarya-birrea-a-rich-hochst-leaf-and-bark-extracts
#15
Daniela Russo, Rocchina Miglionico, Monica Carmosino, Faustino Bisaccia, Paula B Andrade, Patrícia Valentão, Luigi Milella, Maria Francesca Armentano
Sclerocarya birrea (A.Rich.) Hochst (Anacardiaceae) is a savannah tree that has long been used in sub-Saharan Africa as a medicinal remedy for numerous ailments. The purpose of this study was to increase the scientific knowledge about this plant by evaluating the total content of polyphenols, flavonoids, and tannins in the methanol extracts of the leaves and bark (MLE and MBE, respectively), as well as the in vitro antioxidant activity and biological activities of these extracts. Reported results show that MLE is rich in flavonoids (132...
January 8, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29315624/prenatal-alcohol-exposure-increases-histamine-h3-receptor-mediated-inhibition-of-glutamatergic-neurotransmission-in-rat-dentate-gyrus
#16
Rafael K Varaschin, Nyika A Allen, Martina J Rosenberg, C Fernando Valenzuela, Daniel D Savage
BACKGROUND: We have reported that prenatal alcohol exposure (PAE)-induced deficits in dentate gyrus, long-term potentiation (LTP), and memory are ameliorated by the histamine H3 receptor inverse agonist ABT-239. Curiously, ABT-239 did not enhance LTP or memory in control offspring. Here, we initiated an investigation of how PAE alters histaminergic neurotransmission in the dentate gyrus and other brain regions employing combined radiohistochemical and electrophysiological approaches in vitro to examine histamine H3 receptor number and function...
December 5, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/29314152/optimization-of-pressurized-liquid-extraction-by-response-surface-methodology-of-goji-berry-lycium-barbarum-l-phenolic-bioactive-compounds
#17
Giusy Tripodo, Elena Ibáñez, Alejandro Cifuentes, Bienvenida Gilbert-Lopez, Chiara Fanali
Pressurized liquid extraction (PLE) has been used for the first time in this work to extract phenolic compounds from Goji berries according to a multilevel factorial design using response surface methodology. The global yield (% w/dw, weight/dry-weight), total phenolic content (TPC), total flavonoid (TF) and antioxidant activity (determined via ABTS assay, expressed as TEAC value) were used as response variables to study the effects of temperature (50-180°C) and green solvent composition (mixtures of ethanol/water)...
January 3, 2018: Electrophoresis
https://www.readbyqxmd.com/read/29313279/a-phase-1-study-of-parp-inhibitor-abt-767-in-advanced-solid-tumors-with-brca1-2-mutations-and-high-grade-serous-ovarian-fallopian-tube-or-primary-peritoneal-cancer
#18
Diane A J van der Biessen, Jourik A Gietema, Maja J A de Jonge, Ingrid M E Desar, Martha W den Hollander, Matthew Dudley, Martin Dunbar, Robert Hetman, Camille Serpenti, Hao Xiong, Rajendar K Mittapalli, Kirsten M Timms, Peter Ansell, Christine K Ratajczak, Stacie Peacock Shepherd, Carla M L van Herpen
Purpose This phase 1 study examined safety, pharmacokinetics (PK), and efficacy of the poly(ADP-ribose) polymerase (PARP) inhibitor ABT-767 in patients with advanced solid tumors and BRCA1/2 mutations or with high-grade serous ovarian, fallopian tube, or primary peritoneal cancer. Methods Patients received ABT-767 monotherapy orally until disease progression or unacceptable toxicity. Dose was escalated from 20 mg once daily to 500 mg twice daily (BID). Dose-limiting toxicities, recommended phase 2 dose (RP2D), food effect, objective response rate, and biomarkers predicting response were determined...
January 8, 2018: Investigational New Drugs
https://www.readbyqxmd.com/read/29312548/mimicking-the-bim-bh3-domain-overcomes-resistance-to-egfr-tyrosine-kinase-inhibitors-in-egfr-mutant-non-small-cell-lung-cancer
#19
Jinjing Xia, Hao Bai, Bo Yan, Rong Li, Minhua Shao, Liwen Xiong, Baohui Han
Epidermal growth factor receptor tyrosine kinase inhibitors (EGFR TKIs) are widely applied to treat EGFR-mutant non-small cell lung cancer (NSCLC). BIM is a BH3 domain-containing protein encoded by BCL2L11. Some EGFR-mutant NSCLC patients showing BIM deletion polymorphism are resistant to EGFR TKIs. We retrospectively investigated BIM deletion polymorphism in NSCLC patients, its correlation with EGFR TKI (erlotinib) resistance, and the mechanism underlying the drug resistance. Among 245 EGFR-mutant NSCLC patients examined, BIM deletion polymorphism was detected in 43 (12...
December 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29310543/cadmium-and-lead-in-cocoa-powder-and-chocolate-products-in-the-u-s-market
#20
Eileen Abt, Jennifer Fong Sam, Patrick Gray, Lauren Posnick Robin
Cocoa powder and chocolate products are known to sometimes contain cadmium (Cd) and lead (Pb) from environmental origins. A convenience sample of cocoa powder, dark chocolate, milk chocolate, and cocoa nib products was purchased at retail in the U.S. and analyzed using Inductively Coupled Plasma Mass Spectrometry to assess Cd and Pb concentrations. Cd and Pb were evaluated in relation to the percent cocoa solids and to the reported origin of the cocoa powder and chocolate products. Cd ranged from 0.004-3.15 mg/kg and Pb ranged from <LOD-0...
January 8, 2018: Food Additives & Contaminants. Part B, Surveillance
keyword
keyword
86273
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"