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https://www.readbyqxmd.com/read/29460390/safety-assessment-biological-effects-and-mechanisms-of-myrica-rubra-fruit-extract-for-anti-melanogenesis-anti-oxidation-and-free-radical-scavenging-abilities-on-melanoma-cells
#1
Lih-Jeng Juang, Xiang-Yu Gao, Shou-Ting Mai, Cheng-Hung Lee, Ming-Chung Lee, Chao-Ling Yao
OBJECTIVE: Currently, the cosmetic and medical industries are paying considerable attention to solve or prevent skin damage or diseases, such as hyperpigmentation and oxidation and free radical damage. In this study, the effective compounds in Myrica rubra fruit were extracted and studied the biological effects of these M. rubra fruit extracts. METHODS: In this study, we extracted M. rubra fruit using solutions with various ratios of water to ethanol (100:0, 50:50, 5:95) and studied the anti-melanogenesis, anti-oxidation and radical scavenging effects of these M...
February 20, 2018: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29460196/a-comparative-study-of-biotechnological-approaches-for-producing-valuable-flavonoids-in-prosopis-farcta
#2
Somaieh Zafari, Mohsen Sharifi, Najmeh Ahmadian Chashmi
The callus and hairy root cultures of Prosopis farcta were established to develop effective strategies to enhance its valuable and medicinally important flavonoid compounds. For callus induction, the hypocotyl, cotyledon and shoot explants were subjected to different plant hormones, naphthalene acetic acid (NAA), benzylaminopurine (BAP), kinetin and dichlorophenoxyacetic acid (2,4-D). Greater callus induction was obtained from hypocotyl explants on MS medium containing 3.0 mg L-1 NAA + 2.0 mg L-1 BAP. With the addition of 0...
February 19, 2018: Cytotechnology
https://www.readbyqxmd.com/read/29460078/labisia-pumila-prevented-osteoarthritis-cartilage-degeneration-by-attenuating-joint-inflammation-and-collagen-breakdown-in-postmenopausal-rat-model
#3
Iffah Nadhira Madzuki, Seng Fong Lau, Nur Adeelah Che Ahmad Tantowi, Nur Iliyani Mohd Ishak, Suhaila Mohamed
The tropical herb Labisia pumila is traditionally used in facilitating childbirth and post-partum care. The effects of L. pumila leaf extract (LP) in explant cartilage culture and on postmenopausal osteoarthritis (OA) rat model were assessed. The LP (10, 25 and 50 µg/ml) or diclofenac (10 µg/ml) was added to the cartilage explants containing bovine IL-1β (20 ng/ml), to evaluate their direct effects on cartilage degradation. In the preclinical study, rats were grouped (n = 8) into: non-treated OA; OA + diclofenac (5 mg/kg); OA + LP extract (150 and 300 mg/kg); and healthy control...
February 19, 2018: Inflammopharmacology
https://www.readbyqxmd.com/read/29457749/chemical-and-biological-studies-on-bridelia-ferruginea-grown-in-nigeria
#4
Michael Afolayan, Radhakrishnan Srivedavyasasri, Olayinka T Asekun, Oluwole B Familoni, Samir A Ross
Phytochemical investigation of the methanolic extract of dried leaves of Bridelia ferruginea led to the isolation and identification of fourteen compounds (1-14): compound 1 [mixture of palmitic, stearic and oleic acids], stearyl monoester of 2-O-β-ᴅ-glucosylglycerol (2), 6β-hydroxy-(20R)-24-ethylcholest-4-en-3-one (3a), 6β-hydroxy-(20R)-24-ethylcholest-4,22-dien-3-one (3b), lutein (4), vomifoliol (5), corilagin (6), kaempferide-3-O-β-ᴅ-glucoside (7), myricetin (8), isomericitrin (9), isoquercetin (10), myricitrin (11), quercitrin (12), rutin (13), and β-sitosterol glucoside (14)...
February 19, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29444673/effect-of-tt-farnesol-and-myricetin-on-in-vitro-biofilm-formed-by-streptococcus-mutans-and-candida-albicans
#5
Guilherme Roncari Rocha, Elkin Jahir Florez Salamanca, Ana Letícia de Barros, Carmélia Isabel Vitorino Lobo, Marlise Inêz Klein
BACKGROUND: Dental caries is considered a multifactorial disease, in which microorganisms play an important role. The diet is decisive in the biofilm formation because it provides the necessary resources for cellular growth and exopolysaccharides synthesis. Exopolysaccharides are the main components of the extracellular matrix (ECM). The ECM provides a 3D structure, support for the microorganisms and form diffusion-limited environments (acidic niches) that cause demineralization of the dental enamel...
February 14, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29441953/a-cytotoxic-flavonol-glycoside-from-melaleuca-leucadendra-leaves-extract-with-immunostimulant-activity
#6
A N Hashim, N F Swilam, E S Moustafa, S M Bakry, R M Labib, H H Barakat, A B Singab, M W Linscheid, M A Nawwar
Leaves of Melaleuca leucadendra contain the novel flavonol glycoside, myricetin 3-O-β-4C1-galactopyranuronoid. In addition, known fifteen phenolics were identified. All isolates are characterized for the first time from this plant. Structures were established by conventional methods and confirmed by spectral methods of analysis, including one and two-dimensional nuclear magnetic resonance spectroscopy (1D and 2D-NMR) and high resolution electro-spray ionization mass spectrometry (HRESIMS), as well. Assessment of some immunological and biological efficacy, of the extract in combination with a parallel cytotoxicity evaluation, using the method of cellular reduction of 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) technique was carried out...
January 2, 2018: Die Pharmazie
https://www.readbyqxmd.com/read/29438890/flavonoids-from-chinese-bayberry-leaves-induced-apoptosis-and-g1-cell-cycle-arrest-via-erk-pathway-in-ovarian-cancer-cells
#7
Yu Zhang, Shiguo Chen, Chaoyang Wei, Gary O Rankin, Xingqian Ye, Yi Charlie Chen
Ovarian cancer is one of the leading causes of death related to the female reproductive system in western countries. Adverse side effects and resistance to platinum based chemotherapy have become the major obstacles for ovarian cancer treatment. Natural products have gained great attention in cancer treatment in recent years. Chinese bayberry leaves flavonoids (BLF) containing rich content of myricitrin (myricetin 3-O-rhamnoside) and a part of quercetrin (quercetin 3-rhamnoside) inhibited the growth of an ovarian cancer cell line A2780/CP70...
January 31, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29435999/the-effect-of-greenhouse-covering-materials-on-phytochemical-composition-and-antioxidant-capacity-of-tomato-cultivars
#8
Latifeh Ahmadi, Xiuming Hao, Rong Tsao
BACKGROUND: The effect of light transmission (direct and diffuse) on the phenolic compounds of five tomato cultivars was investigated under controlled conditions in greenhouses covered with different covering materials. RESULTS: The type of covering materials and type of diffusion of light simultaneously affected the reducing power of cultivars. In the present study, a two-way analysis of variance showed statistically significant differences in total phenolic compound (TPC) for the different cultivars (P<0...
February 13, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29435700/the-content-of-dietary-fibre-and-polyphenols-in-morphological-parts-of-buckwheat-fagopyrum-tataricum
#9
Krzysztof Dziedzic, Danuta Górecka, Artur Szwengiel, Hanna Sulewska, Ivan Kreft, Elżbieta Gujska, Jarosław Walkowiak
In this report, we presented the profile of polyphenolic substances in flowers, leaves, stalk and roots of Fagopyrum tataricum estimated by using RP-UHPLC-ESI-MS equipment (reversed-phase ultra-high-performance liquid chromatography electrospray ionisation mass spectrometry). The neutral detergent fibre, acid detergent fibre, acid detergent lignin, cellulose and hemicellulose were also determined. Flowers, leaves, stalk and roots showed varying levels of dietary fibre and polyphenols. The highest content of neutral and acid detergent fibre were found in the roots (63...
February 12, 2018: Plant Foods for Human Nutrition
https://www.readbyqxmd.com/read/29433774/phenolics-and-essential-mineral-profile-of-organic-acid-pretreated-unripe-banana-flour
#10
Tonna A Anyasi, Afam I O Jideani, Godwin R A Mchau
Banana fruit (Musa spp) though rich in essential minerals, has also been implicated for the presence of phytochemicals which nonetheless beneficial, can also act as mineral inhibitors when in forms such as phenolic compounds, phytates and tannins. This study assayed the essential macro and trace minerals as well as phenolic compounds present in unripe banana flour (UBF) obtained from the pulp of four different cultivars. Unripe banana flour was processed by oven drying in a forced air oven dryer at 70°C upon pretreatment with ascorbic, citric and lactic acid...
February 2018: Food Research International
https://www.readbyqxmd.com/read/29430965/extraction-optimization-total-phenolic-flavonoid-contents-hplc-dad-analysis-and-diverse-pharmacological-evaluations-of-dysphania-ambrosioides-l-mosyakin-clemants
#11
Tanzeel Zohra, Muhammad Ovais, Ali Talha Khalil, Muhammad Qasim, Muhammad Ayaz, Zabta Khan Shinwari
The present study aims to evaluate phytochemical and pharmacological potentials of Dysphania ambrosioides (L.) Mosyakin & Clemants previously known as Chenopodium ambrosioides L. Extraction was carried out using 14 solvents with wide range of polarity to find out the best solvent system for each bioactivity. Total phenolic and flavonoids contents were measured colorimetrically and polyphenolics were quantified via HPLC-DAD analysis. The samples were screened for inhibitory potentials against free radicals, leishmania, cancer cell lines, protein kinase, α-Amylase enzymes and microbial strains...
February 12, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29428644/sers-study-of-riboflavin-on-green-synthesized-silver-nanoparticles-prepared-by-reduction-using-different-flavonoids-what-is-the-role-of-flavonoid-used
#12
Marie Švecová, Pavel Ulbrich, Marcela Dendisová, Pavel Matějka
Spectroscopy of surface-enhanced Raman scattering (SERS) is nowadays widely used in the field of bio-science and medicine. These applications require new enhancing substrates with special properties. They should be non-toxic, environmentally friendly and (bio-) compatible with examined samples. Flavonoids are natural antioxidants with many positive effects on human health. Simultaneously, they can be used as reducing agent in preparation procedure of plasmonic enhancing substrate for SERS spectroscopy. The best amplifiers of Raman vibrational spectroscopic signal are generally silver nanoparticles (AgNPs)...
February 2, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29397771/dual-hiv-1-reverse-transcriptase-and-integrase-inhibitors-from-limonium-morisianum-arrigoni-an-endemic-species-of-sardinia-italy
#13
Cinzia Sanna, Daniela Rigano, Angela Corona, Dario Piano, Carmen Formisano, Domenica Farci, Genni Franzini, Mauro Ballero, Giuseppina Chianese, Enzo Tramontano, Orazio Taglialatela-Scafati, Francesca Esposito
During our search for potential templates of HIV-1 reverse transcriptase (RT) and integrase (IN) dual inhibitors, the methanolic extract obtained from aerial parts of Limonium morisianum was investigated. Repeated bioassay-guided chromatographic purifications led to the isolation of the following secondary metabolites: myricetin, myricetin 3-O-rutinoside, myricetin-3-O-(6″-O-galloyl)-β-d-galactopyranoside, (-)-epigallocatechin 3-O-gallate, tryptamine, ferulic and phloretic acids. The isolated compounds were tested on both HIV-1 RT-associated RNase H and IN activities...
February 4, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29389555/composition-of-phenolic-compounds-and-antioxidant-attributes-of-cyclea-gracillima-diels-extracts
#14
Jau-Tien Lin, Shih-Chuan Liu, Li-Chun Kuo, Deng-Jye Yang
Cyclea gracillima Diels is a Taiwanese native medicinal herb. However, there are currently few relevant reports on its biochemical activity. In this study, the antioxidant attributes of the ethanol and hot water extracts of this herb were assayed using in vitro models, including the following: 2,2-diphenyl-1-(2,4,6-trinitrophenyl)-hydrazyl radical scavenging, Trolox equivalent antioxidant capacity, reducing power, and chelating ferrous ions. The following biochemical models were also assayed: inhibition of human low density lipoprotein oxidation, inhibition of human erythrocyte hemolysis, and scavenging oxygen radicals in human blood...
January 2018: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/29384662/a-triple-functional-approach-to-simultaneously-determine-the-type-concentration-and-size-of-titanium-dioxide-particles
#15
Bin Zhao, Tianxi Yang, Zhiyun Zhang, Michael Edward Hickey, Lili He
The large-scale manufacturing and use of titanium dioxide (TiO2) particles in food and consumer products significantly increase the likelihood of human exposure and release into the environment. We present a simple and innovative approach to rapidly identify the type (anatase or rutile), as well as estimate the size and concentration, of TiO2 particles using Raman spectroscopy and surface-enhanced Raman spectroscopy (SERS). The identification and discrimination of rutile and anatase were based on their intrinsic Raman signatures...
January 31, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29374230/targeted-and-untargeted-metabolic-profiling-of-wild-grassland-plants-identifies-antibiotic-and-anthelmintic-compounds-targeting-pathogen-physiology-metabolism-and-reproduction
#16
Katherine E French, Joe Harvey, James S O McCullagh
Plants traditionally used by farmers to manage livestock ailments could reduce reliance on synthetic antibiotics and anthelmintics but in many cases their chemical composition is unknown. As a case study, we analyzed the metabolite profiles of 17 plant species and 45 biomass samples from agricultural grasslands in England using targeted and untargeted metabolite profiling by liquid-chromatography mass spectrometry. We identified a range of plant secondary metabolites, including 32 compounds with known antimicrobial/anthelmintic properties which varied considerably across the different plant samples...
January 26, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29366865/phytochemical-analysis-and-antibacterial-activity-of-methanolic-extract-of-bergenia-purpurascens-against-common-respiratory-infection-causing-bacterial-species-in-vitro-and-in-neonatal-rats
#17
Bao Liu, Min Wang, Xiaonan Wang
Respiratory bacterial infections are responsible for significant mortality across the world and with emergence of drug resistant bacterial strains there is urgent need to look for new treatment options. In this study we evaluated the antimicrobial activity of methanolic extract of Bergenia purpurasceus in vitro and in neonatal rats. The results of the present study revealed that the methanolic extract exhibits antimicrobial activity against all the bacterial species with MIC ranging from 75 to 150 μg/ml...
January 20, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29347842/in-vitro-antioxidant-potential-and-in-vivo-effects-of-schinus-terebinthifolia-raddi-leaf-extract-in-diabetic-rats-and-determination-of-chemical-composition-by-hplc-esi-ms-ms
#18
Camila Cristina Iwanaga, Lilian Dos Anjos Oliveira Ferreira, Karine Zanoli Bernuci, Carla Maria Mariano Fernandez, Fabiana Brusco Lorenzetti, Camila Caviquioli Sehaber, Flávia Cristina Vieira Frez, Sara Santos Bernardes, Gean Pier Panizzon, Giani Andrea Linde, Maria do Carmo Vieira, Jacqueline Nelisis Zanoni, Diógenes Aparício Garcia Cortez
The present study investigated the in vitro and in vivo antioxidant potential and phytochemical composition of Schinus terebinthifolia, which is widely used in folk medicine for various therapeutic purposes. The in vitro analyses indicated that the hydroethanolic extract (HE) had 312.50 ± 0.50 mg GAE/g of total phenols. It also presented anti-DPPH• and anti-ABTS•+ activity, reduced phosphomolybden and metal ions and blocked the bleaching of β-carotene. The HE at concentrations of 3.0 and 2.0 μg/mL had TRAP values of 2...
January 18, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29317180/oral-administration-of-fisetin-promotes-the-induction-of-hippocampal-long-term-potentiation-in%C3%A2-vivo
#19
Wen-Bin He, Kazuho Abe, Tatsuhiro Akaishi
To explore memory enhancing effect of the flavonoid fisetin, we investigated the effect of oral administration of flavonoids on the induction of long-term potentiation (LTP) at hippocampal CA1 synapses of anesthetized rats. Among four flavonoids (fisetin, quercetin, luteolin and myricetin) tested, only fisetin significantly facilitated the induction of hippocampal LTP. The effect of oral fisetin was abolished by intracerebroventricular injection of U0126, an agent that was previously found to inhibit its effect in hippocampal slices in vitro...
December 20, 2017: Journal of Pharmacological Sciences
https://www.readbyqxmd.com/read/29302579/myricetin-inhibits-angiogenesis-by-inducing-apoptosis-and-suppressing-pi3k-akt-mtor-signaling-in-endothelial-cells
#20
Gi Dae Kim
Background: Myricetin has been shown to possess potential antiangiogenic effects in endothelial cells. However, the underlying mechanisms are not fully understood. Therefore, we evaluated its antiangiogenic effects in human umbilical vascular endothelial cells (HUVECs). Methods: HUVECs were cultured in endothelial cell growth medium-2 to induce proliferation and angiogenesis and treated with different doses of myricetin (0.25, 0.5, and 1 μM) for 24 hours. Cell proliferation was analyzed by the MTT and lactate dehydrogenase release assays; angiogenesis was determined by the tube formation assay...
December 2017: Journal of Cancer Prevention
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