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https://www.readbyqxmd.com/read/28531138/phytochemical-composition-and-antioxidant-capacity-of-seven-saskatoon-berry-amelanchier-alnifolia-nutt-genotypes-grown-in-poland
#1
Sabina Lachowicz, Jan Oszmiański, Łukasz Seliga, Stanisław Pluta
The basic chemical composition, bioactive compounds, and antioxidant capacity of fruits of three new Polish breeding clones (No. 5/6, type S, and type N) and four Canadian cultivars (cvs.) ("Martin", "Smoky", "Pembina", and "Honeywood") grown in Poland in 2016 were investigated. Fruits were analyzed for their contents of triterpenoids, carotenoids, chlorophylls, and polyphenolics with the ultra-performance liquid chromatography photodiode detector-quadrupole/time-of-flight mass spectrometry (UPLC-PDA-Q/TOF-MS) method, sugar with the high-performance liquid chromatography-evaporative light scattering detector (HPLC-ELSD) method, and antioxidant capacity with the ability to reduce free radical (ABTS) and ferric reducing ability of plasma (FRAP) method...
May 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28530553/evaluation-of-oxidative-stability-of-lamb-burger-with-origanum-vulgare-extract
#2
R P P Fernandes, M A Trindade, F G Tonin, S M P Pugine, C G Lima, J M Lorenzo, M P de Melo
The objective was to evaluate replacement of sodium erythorbate with a natural antioxidant (oregano extract) on physicochemical and sensory stability of lamb burgers, and determine the appropriate amount. Five treatments were prepared, including control (without antioxidant), sodium erythorbate, and three concentrations of oregano extract (13.32, 17.79 and 24.01mL/kg), based on antioxidant capacity determined using the Folin-Ciocalteu, 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) methods, respectively...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28523965/safety-evaluation-of-an-oat-grain-alkaloid-gramine-by-genotoxicity-assays
#3
Manash Pratim Pathak, Rudragoud S Policegoudra, Danswrang Goyary, Aparoop Das, Santa Mandal, Srijita Chakraborti, Nilutpal Sharma Bora, Johirul Islam, Pompy Patowary, P Srinivas Raju, Pronobesh Chattopadhyay
Gramine is a natural indole alkaloid that has been isolated from different raw plants occurring mainly in Avena sativa, etc. The study was aimed to investigate the possible in vitro antioxidant, in vitro mutagenic, in vitro antimutagenic, and in vivo genotoxic activity of gramine using ferric reducing ability of plasma (FRAP) assay, Metal chelating, Ames bacterial reverse mutation test, and the mouse bone marrow micronucleus assay as well as chromosomal aberration. Four concentrations of gramine viz. 250, 500, 1000, and 2000 μg/mL were evaluated for its antioxidant activity in FRAP Assay and Metal Chelating Test...
May 19, 2017: Drug and Chemical Toxicology
https://www.readbyqxmd.com/read/28521871/relation-of-antioxidant-capacity-of-diet-and-markers-of-oxidative-status-with-c-reactive-protein-and-adipocytokines-a-prospective-study
#4
Najada Stringa, Adela Brahimaj, Asija Zaciragic, Abbas Dehghan, Mohammad Arfan Ikram, Albert Hofman, Taulant Muka, Jessica C Kiefte-de Jong, Oscar H Franco
BACKGROUND: The role of dietary antioxidants and plasma oxidant-antioxidant status in low-grade chronic inflammation and adipocytokine levels is not established yet. OBJECTIVES: We aimed to evaluate whether total dietary antioxidant capacity (assessed by dietary ferric reducing antioxidant potential (FRAP)), serum uric acid (UA) and gamma glutamyltransferase (GGT) were associated with low-grade chronic inflammation and circulating adipocytokines. METHODS: Data of 4506 participants aged ≥55years from the Rotterdam Study were analyzed...
June 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28521012/the-effect-of-dl-l-isomers-and-dl-hydroxy-analog-administered-at-2-levels-as-dietary-sources-of-methionine-on-the-metabolic-and-antioxidant-parameters-and-growth-performance-of-turkeys
#5
J Jankowski, K Ognik, M Kubinska, A Czech, J Juskiewicz, Z Zdunczyk
A hypothesis was verified that dietary methionine (Met) improves the growth and antioxidant status of turkeys, and that its effects depend on dietary inclusion levels and sources. A total of 816 female Hybrid Converter turkeys was fed wheat-soybean meal-based diets supplemented with 3 sources of Met: DL-, L-isomers and DL-hydroxy analog (DLM, LM, and MHA, respectively). In 4 4-week periods (from one to 16 wk of age), dietary Met content corresponded to NRC (1994) recommendations or was increased by approximately 50% (in one to 8 wk by 44 to 46% and in 9 to 16 wk by 55 to 56% vs...
May 17, 2017: Poultry Science
https://www.readbyqxmd.com/read/28514891/synergistic-effect-of-rapamycin-and-metformin-against-age-dependent-oxidative-stress-in-rat-erythrocyte
#6
Abhishek Kumar Singh, Geetika Garg, Sandeep Singh, Syed Ibrahim Rizvi
Erythrocytes are particularly vulnerable towards age-dependent oxidative stress mediated damage. Caloric restriction mimetics (CRMs) may provide a novel strategy for the maintenance of redox balance as well as effective treatment of age associated diseases. Herein, we have investigated the beneficial effect of co-treatment of CRM-candidate drugs, rapamycin (an immunosuppressant drug and inhibitor of mammalian target of rapamycin) and metformin (an anti-diabetic biguanide and activator of adenosine monophosphate kinase) against aging-induced oxidative stress in erythrocytes and plasma of aging rats...
May 17, 2017: Rejuvenation Research
https://www.readbyqxmd.com/read/28508581/effect-of-under-and-overfeeding-on-sheep-and-goat-milk-and-plasma-enzymes-activities-related-to-oxidation
#7
E Tsiplakou, C Mitsiopoulou, A Mavrommatis, C Karaiskou, E G Chronopoulou, G Mavridis, K Sotirakoglou, N E Labrou, G Zervas
Twenty-four dairy sheep and goats, respectively, were assigned each to three homogenous subgroups per animal species and fed the same diet in quantities which met 70% (underfeeding), 100% (control) and 130% (overfeeding) of their energy and crude protein requirements. The results showed that the underfed sheep in comparison with the control had significantly lower glutathione reductase (GR), superoxide dismutase (SOD), catalase and glutathione peroxidase (GPX) activities and total antioxidant capacity (measured with Ferric Reducing Ability of Plasma [FRAP] assay) in their blood plasma...
May 15, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28507569/effects-of-a-novel-ascorbate-based-protocol-on-infarct-size-and-ventricle-function-in-acute-myocardial-infarction-patients-undergoing-percutaneous-coronary-angioplasty
#8
Cristóbal Ramos, Roberto Brito, Jaime González-Montero, Nicolás Valls, Juan G Gormaz, Juan C Prieto, Rubén Aguayo, Ángel Puentes, Viviana Noriega, Gonzalo Pereira, Tamara Palavecino, Ramón Rodrigo
INTRODUCTION: This study was designed to test the hypothesis that high-dose ascorbate prior to reperfusion followed by low chronic oral doses ameliorate myocardial reperfusion injury (MRI) in acute myocardial infarction patients subjected to primary percutaneous coronary angioplasty (PCA). MATERIAL AND METHODS: A randomized double-blind placebo-controlled and multicenter clinical trial was performed on acute myocardial infarction (AMI) patients who underwent PCA...
April 1, 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28507142/quantitative-assessment-of-passive-electrical-properties-of-the-cardiac-t-tubular-system-by-frap-microscopy
#9
M Scardigli, C Crocini, C Ferrantini, T Gabbrielli, L Silvestri, R Coppini, C Tesi, E A Rog-Zielinska, P Kohl, E Cerbai, C Poggesi, F S Pavone, L Sacconi
Well-coordinated activation of all cardiomyocytes must occur on every heartbeat. At the cell level, a complex network of sarcolemmal invaginations, called the transverse-axial tubular system (TATS), propagates membrane potential changes to the cell core, ensuring synchronous and uniform excitation-contraction coupling. Although myocardial conduction of excitation has been widely described, the electrical properties of the TATS remain mostly unknown. Here, we exploit the formal analogy between diffusion and electrical conductivity to link the latter with the diffusional properties of TATS...
May 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28505193/the-drosophila-orthologue-of-the-int6-onco-protein-regulates-mitotic-microtubule-growth-and-kinetochore-structure
#10
Fioranna Renda, Claudia Pellacani, Anton Strunov, Elisabetta Bucciarelli, Valeria Naim, Giuseppe Bosso, Elena Kiseleva, Silvia Bonaccorsi, David J Sharp, Alexey Khodjakov, Maurizio Gatti, Maria Patrizia Somma
INT6/eIF3e is a highly conserved component of the translation initiation complex that interacts with both the 26S proteasome and the COP9 signalosome, two complexes implicated in ubiquitin-mediated protein degradation. The INT6 gene was originally identified as the insertion site of the mouse mammary tumor virus (MMTV), and later shown to be involved in human tumorigenesis. Here we show that depletion of the Drosophila orthologue of INT6 (Int6) results in short mitotic spindles and deformed centromeres and kinetochores with low intra-kinetochore distance...
May 15, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28505129/assessment-of-antimicrobial-and-antioxidant-activities-of-nepeta-trachonitica-analysis-of-its-phenolic-compounds-using-hplc-ms-ms
#11
Ekrem Köksal, Hatice Tohma, Ömer Kılıç, Yusuf Alan, Abdülmelik Aras, İlhami Gülçin, Ercan Bursal
Continuing our work on the sources of natural bioactive compounds, we evaluated the antimicrobial and antioxidant activities of Nepeta trachonitica as well as its major phenolic content using the high-performance liquid chromatography-mass spectrometry/mass spectrometry (HPLC-MS/MS) technique. For antioxidant activity, ferric reducing antioxidant power (FRAP) and cupric ion reducing antioxidant capacity (CUPRAC) methods were performed to measure the reducing power and 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay was employed to evaluate the radical scavenging activity of the sample...
May 15, 2017: Scientia Pharmaceutica
https://www.readbyqxmd.com/read/28502709/organizational-innovation-of-apical-actin-filaments-drives-rapid-pollen-tube-growth-and-turning
#12
Xiaolu Qu, Ruihui Zhang, Meng Zhang, Min Diao, Yongbiao Xue, Shanjin Huang
Polarized tip growth is a fundamental cellular process in many eukaryotes. In this study, we examined the dynamic restructuring of the actin cytoskeleton and its relationship to vesicle transport during pollen tip growth in Arabidopsis. We found that actin filaments originating from the apical membrane form a specialized structure consisting of longitudinally aligned actin bundles at the cortex and inner cytoplasmic filaments with a distinct distribution. Using actin-based pharmacological treatments and genetic mutants in combination with FRAP (fluorescence recovery after photobleaching) technology to visualize the transport of vesicles within the growth domain of pollen tubes, we demonstrate that cortical actin filaments facilitate tip-ward vesicle transport...
May 10, 2017: Molecular Plant
https://www.readbyqxmd.com/read/28501692/trans-chalcone-added-in-topical-formulation-inhibits-skin-inflammation-and-oxidative-stress-in-a-model-of-ultraviolet-b-radiation-skin-damage-in-hairless-mice
#13
Renata M Martinez, Felipe A Pinho-Ribeiro, David L Vale, Vinicius S Steffen, Fabiana T M C Vicentini, Josiane A Vignoli, Marcela M Baracat, Sandra R Georgetti, Waldiceu A Verri, Rubia Casagrande
Trans-chalcone (TC) is a common precursor of flavonoids. However, the pharmacological properties of TC remain to be fully understood. The present study investigated whether topical formulation containing TC (TFcTC) presents therapeutic effect in UVB radiation-induced skin damage using disease, enzyme activity, antioxidant activity, protein and mRNA parameters. Control topical formulation (CTF) and TFcTC were applied in hairless mice before and after exposure to UVB radiation. Dorsal skin samples were collected after UVB exposure to evaluate: i) skin edema (weight) was measured by punch biopsy; ii) spectrophotometric assays were used to measure myeloperoxidase (MPO) and catalase activities, ferric (FRAP) and ABTS cation reducing antioxidant power, superoxide anion production and levels of reduced glutathione (GSH); iii) enzymography was used to measure matrix metalloproteinase-9 (MMP-9) activity; iv) chemiluminescence was used to measure the lipid peroxidation (LPO); v) enzyme-linked immunosorbent assay (ELISA) was used to measure tumor necrosis factor alpha (TNF-α) levels; vi) reverse transcription quantitative PCR (RT-qPCR) was used to measure cyclooxygenase-2 (COX-2), gp91(phox) (NADPH oxidase sub-unity), glutathione peroxidase-1 (Gpx1), glutathione reductase (Gr), nuclear factor erythroid 2-related factor 2 (Nrf2), and heme oxygenase-1 (HO-1) mRNA expression...
May 2, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28496485/phytochemicals-antioxidant-and-antiproliferative-properties-of-rosmarinus-officinalis-l-on-u937-and-caco-2-cells
#14
Yacine Amar, Boumediene Meddah, Irene Bonacorsi, Gregorio Costa, Gaetana Pezzino, Antonina Saija, Mariateresa Cristani, Soulef Boussahel, Guido Ferlazzo, Aicha Tirtouil Meddah
Rosmarinus officinalis L., a medicinal herb from the labiates family, has been reported to have potential benefit in the treatment and prevention of several diseases. In particular its phenolics have demonstrated protective effects on various types of cancer through several mechanisms. The present study aimed to determine the effects of rosemary phenolic extracts on human cell functions, with particular regard to their anti-proliferative properties in three cell types U937, CaCo-2 and the peripheral blood mononuclear cells (PBMCs)...
2017: Iranian Journal of Pharmaceutical Research: IJPR
https://www.readbyqxmd.com/read/28496475/the-effect-of-green-tea-extract-on-oxidative-stress-and-spatial-learning-in-streptozotocin-diabetic-rats
#15
Mohammad Sharifzadeh, Akram Ranjbar, Asieh Hosseini, Mahnaze Khanavi
Diabetes mellitus is associated with distribution of cognitive functioning. Hyperglycemia induced oxidative stress has been proposed as a cause of memory complications of diabetes including cognitive impairment. The aim of this study was to examine total green tea extract (TGTE), a potent free radical scavenger against spatial impairment in Streptozotocin-diabetic rats. Eight weeks after diabetes induction, TGTE was administrated throught drinking water 3 mg/L. The learning and memory behavior was evaluated with Morris water maze task in male rats...
2017: Iranian Journal of Pharmaceutical Research: IJPR
https://www.readbyqxmd.com/read/28490191/proliferative-and-antioxidant-activity-of-symphytum-officinale-root-extract
#16
Ireneusz Sowa, Roman Paduch, Maciej Strzemski, Sylwia Zielińska, Ewelina Rydzik-Strzemska, Jan Sawicki, Ryszard Kocjan, Janusz Polkowski, Adam Matkowski, Michał Latalski, Magdalena Wójciak-Kosior
The root of Symphytum officinale L. is commonly used in folk medicine to promote the wound healing, reduce the inflammation and in the treatment of broken bones. The objective of our investigation was to analyse the extract from S. officinale in term of its antioxidant activity and the effect on cell viability and proliferation of human skin fibroblast (HSF). Moreover, the quantification of main phenolics and allantoin was conducted using HPLC-DAD method. Five compounds were found: rosmarinic, p-hydroxybenzoic, caffeic, chlorogenic and p-coumaric acid...
May 10, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28490142/relation-between-polyphenol-profile-and-antioxidant-capacity-of-different-argentinean-wheat-varieties-a-boosted-regression-trees-study
#17
Natalia S Podio, María V Baroni, Daniel A Wunderlin
We report the polyphenol profile and antioxidant capacity (AC) of 12 Argentinean wheat varieties from different regions. The polyphenol profile was studied by HPLC-MS. The AC was measured by TEAC and FRAP. Twenty-five polyphenols were identified. ACA 315 and KLEIN GUERRERO varieties showed the highest content of polyphenols, whereas BIOINTA 3004, KLEIN CAPRICORNIO and LE 2330 showed the lowest one. ACA 315 presented the highest AC, while BIOINTA 3004 and KLEIN CAPRICORNIO showed the lowest one. Boosted Regression Trees (BRT) analyses helped finding significant correlations between AC and polyphenol profile, being hydroxybenzoic acid diglucoside, tryptophan, chrysoeriol-6,8-di-C-pentoside and isomers 4, 5, 9 and 12 of diferulic acids key compounds to explain the observed AC...
October 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28490120/evaluation-of-antioxidant-potential-of-artocarpus-heterophyllus-l-j33-variety-fruit-waste-from-different-extraction-methods-and-identification-of-phenolic-constituents-by-lcms
#18
Mohd Nazrul Hisham Daud, Dian Nashiela Fatanah, Noriham Abdullah, Rohaya Ahmad
Artocarpus heterophyllus J33 (AhJ33) fruit is a popular and valuable jackfruit variety in Malaysia. For export, the pulp has to be separated from the skin which is usually discarded. Hence, the conversion of the fruit waste to food products with economic value needs to be explored utilizing the waste to wealth concept. This paper reports the evaluation of antioxidant potential of AhJ33 fruit waste (rind and rachis) extracts from three different extraction methods (maceration, percolation and Soxhlet). The antioxidant potential was assessed by DPPH radical scavenging, FRAP and β-carotene bleaching assays...
October 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28488417/melanogenesis-inhibitory-and-antioxidant-activities-of-phenolics-from-periploca-forrestii
#19
Cai-Ling Sun, Lei Chen, Jian Xu, Wei Qu, Li Guan, Wen-Yuan Liu, Toshihiro Akihisa, Feng Feng, Jie Zhang
Two new tetrahydrofuran-type lignans, (-)-gentioluteol-9-O-β-D-glucoside (1), (-)-berchemol 9-O-β-D-apiofuranosyl-(1→6)-O-β-D-glucopyranoside (2), along with sixteen known compounds 3-18 were isolated from the 95% EtOH extract of the stems of Periploca forrestii. The structures of new tetrahydrofuran-type lignans were determined by HR-ESI-MS and various NMR techniques in combination with CD method. Then, their antioxidant abilities were evaluated by 1,1-diphenyl-2-picrylhydrazul (DPPH), 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging activity, and ferric-reducing antioxidant power (FRAP) assays...
May 10, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28481230/the-effect-of-isomaltulose-together-with-green-tea-on-glycemic-response-and-antioxidant-capacity-a-single-blind-crossover-study-in-healthy-subjects
#20
Passakorn Suraphad, Phim On Suklaew, Sathaporn Ngamukote, Sirichai Adisakwattana, Kittana Mäkynen
Isomaltulose, a naturally-occurring isomer of sucrose, is commonly used as an alternative sweetener in foods and beverages. The goal of this study was to determine the effect of isomaltulose together with green tea on postprandial plasma glucose and insulin concentration, as well as antioxidant capacity in healthy subjects. In a randomized, single-blind, crossover study, 15 healthy subjects (eight women and seven men; ages 23.5 ± 0.7 years; with body mass index of 22.6 ± 0.4 kg/m²) consumed five beverages: (1) 50 g sucrose in 400 mL water; (2) 50 g isomaltulose in 400 mL of water; (3) 400 mL of green tea; (4) 50 g sucrose in 400 mL of green tea; and (5) 50 g isomaltulose in 400 mL of green tea...
May 6, 2017: Nutrients
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