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https://www.readbyqxmd.com/read/28634494/antiviral-activity-of-fridericia-formosa-bureau-l-g-lohmann-bignoniaceae-extracts-and-constituents
#1
Geraldo Célio Brandão, Erna G Kroon, José D Souza Filho, Alaíde Braga Oliveira
A phytochemical study of Fridericia formosa (Bignoniaceae) ethanol extracts of leaves, stems, and fruits was guided by in vitro assays against vaccinia virus Western Reserve (VACV-WR), human herpes virus 1 (HSV-1), murine encephalomyocarditis virus (EMCV), and dengue virus type 2 (DENV-2) by the MTT method. All the ethanol extracts were active against DENV-2, HSV-1, and VACV-WR with best results for the fruits extract against DENV-2 (SI > 38.2). For VACV-WR and HSV-1, EC50 values > 200 μg mL(-1) were determined, while no inhibition of the cytopathic effect was observed with EMCV...
2017: Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28634482/whole-plant-temperature-manipulation-affects-flavonoid-metabolism-and-the-transcriptome-of-grapevine-berries
#2
Chiara Pastore, Silvia Dal Santo, Sara Zenoni, Nushin Movahed, Gianluca Allegro, Gabriele Valentini, Ilaria Filippetti, Giovanni Battista Tornielli
Among environmental factors, temperature is the one that poses serious threats to viticulture in the present and future scenarios of global climate change. In this work, we evaluated the effects on berry ripening of two thermal regimes, imposed from veraison to harvest. Potted vines were grown in two air-conditioned greenhouses with High Temperature (HT) and Low Temperature (LT) regimes characterized by 26 and 21°C as average and 42 and 35°C as maximum air daily temperature, respectively. We conducted analyses of the main berry compositional parameters, berry skin flavonoids and berry skin transcriptome on HT and LT berries sampled during ripening...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28634464/anti-inflammatory-and-neuroprotective-effects-of-co-ultrapealut-in-a-mouse-model-of-vascular-dementia
#3
Rosalba Siracusa, Daniela Impellizzeri, Marika Cordaro, Rosalia Crupi, Emanuela Esposito, Stefania Petrosino, Salvatore Cuzzocrea
Vascular dementia (VaD), the second most common cause of cognitive impairment in the population, is a disease that results from reduction in regional cerebral blood flow and involves oxidative stress and inflammation. Co-ultramicronized PEALut (co-ultra PEALut) is a new compound with beneficial effects, which include anti-inflammatory and antioxidant properties. Recently, co-ultraPEALut has been shown to exhibit neuroprotective effects in models of Parkinson's disease, cerebral ischemia and Alzheimer's disease...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28634125/metabolic-engineering-of-yeast-for-fermentative-production-of-flavonoids
#4
Angelica Rodriguez, Tomas Strucko, Steen Gustav Stahlhut, Mette Kristensen, Daniel Killerup Svenssen, Jochen Forster, Jens Nielsen, Irina Borodina
Yeast Saccharomyces cerevisiae was engineered for de novo production of six different flavonoids (naringenin, liquiritigenin, kaempferol, resokaempferol, quercetin, and fisetin) directly from glucose, without supplementation of expensive intermediates. This required reconstruction of long biosynthetic pathways, comprising up to eight heterologous genes from plants. The obtained titers of kaempferol 26.57±2.66mgL(-1) and quercetin 20.38±2.57mgL(-1) exceed the previously reported titers in yeast. This is also the first report of de novo biosynthesis of resokaempferol and fisetin in yeast...
June 12, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28634060/potent-inhibitions-of-monoamine-oxidase-a-and-b-by-acacetin-and-its-7-o-6-o-malonylglucoside-derivative-from-agastache-rugosa
#5
Hyun Woo Lee, Hyung Won Ryu, Seung Cheol Baek, Myung-Gyun Kang, Daeui Park, Hyoung-Yun Han, Ju Hyeon An, Sei-Ryang Oh, Hoon Kim
Five compounds were isolated from the leaves of Agastache rugosa and tested for monoamine oxidase (MAO) inhibitory activity. Acacetin, a flavonoid, potently inhibited recombinant human MAO-A and MAO-B (IC50=0.19 and 0.17μM, respectively), and reversibly and competitively inhibited MAO-A and MAO-B (Ki=0.045 and 0.037μM, respectively). Acacetin 7-O-(6-O-malonylglucoside) (AMG) was also found to effectively inhibit MAO-A and MAO-B (IC50=2.34 and 1.87μM, respectively), and to reversibly and competitively inhibit MAO-A and MAO-B (Ki=1...
June 17, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28633497/genome-wide-identification-and-functional-characterization-of-udp-glucosyltransferase-genes-involved-in-flavonoid-biosynthesis-in-glycine-max
#6
Qinggang Yin, Guoan Shen, Shaokang Di, Cunying Fan, Zhenzhan Chang, Yongzhen Pang
Flavonoids, natural products abundant in the model legume Glycine max, confer benefits to plants and animals health. Flavonoids are present in soybean mainly as glycoconjugates. However, the biosynthesis mechanisms of flavonoid glycosides are largely unknown in G. max. In the present study, 212 putative UDP-glycosyltransferase (UGTs) genes were identified in G. max by genome-wide searching. The GmUGT genes were distributed differentially among the twenty chromosomes, and they were expressed in various tissues with distinct expression profile...
June 19, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28633353/modulating-role-of-ros-in-re-establishing-desiccation-tolerance-in-germinating-seeds-of-caragana-korshinskii-kom
#7
Long Peng, Sirui Lang, Yu Wang, Hugh W Pritchard, Xiaofeng Wang
In close agreement with visible germination, orthodox seeds lose desiccation tolerance (DT). This trait can be regained under osmotic stress, but the mechanisms are poorly understood. In this study, germinating seeds of Caragana korshinskii Kom. were investigated, focusing on the potential modulating roles of reactive oxygen species (ROS) in the re-establishment of DT. Germinating seeds with 2 mm long radicles can be rendered tolerant to desiccation by incubation in a polyethylene glycol (PEG) solution (-1...
June 15, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28632894/flavonoids-as-modulators-of-metabolic-enzymes-and-drug-transporters
#8
REVIEW
Anca Miron, Ana Clara Aprotosoaie, Adriana Trifan, Jianbo Xiao
Flavonoids, natural compounds found in plants and in plant-derived foods and beverages, have been extensively studied with regard to their capacity to modulate metabolic enzymes and drug transporters. In vitro, flavonoids predominantly inhibit the major phase I drug-metabolizing enzyme CYP450 3A4 and the enzymes responsible for the bioactivation of procarcinogens (CYP1 enzymes) and upregulate the enzymes involved in carcinogen detoxification (UDP-glucuronosyltransferases, glutathione S-transferases (GSTs))...
June 20, 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28631923/influence-of-ingesting-a-flavonoid-rich-supplement-on-the-metabolome-and-concentration-of-urine-phenolics-in-overweight-obese-women
#9
David C Nieman, Sivapriya Ramamoorthy, Colin D Kay, Courtney L Goodman, Christopher R Capps, Zach L Shue, Nicole Heyl, Mary H Grace
This study evaluated the effect of ingesting a flavonoid-rich supplement (329 mg/d) on total urine phenolics and shifts in plasma metabolites in overweight/obese female adults using untargeted metabolomics procedures. Participants (N=103, 18-65 y, BMI ≥ 25 kg/m2) were randomized to flavonoid (F) or placebo (P) groups for 12 weeks, with blood and 24-h urine samples collected pre-study, 4- and 12-weeks in a parallel design. Supplements were prepared as chewable tablets, and included vitamin C, wild bilberry fruit extract, green tea leaf extract, quercetin, caffeine, and omega 3 fatty acids...
June 20, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28631810/flavonoids-of-lotus-nelumbo-nucifera-seed-embryos-and-their-antioxidant-potential
#10
Mingzhi Zhu, Ting Liu, Chunyun Zhang, Mingquan Guo
Flavonoids from lotus (Nelumbo nucifera) seed embryos were fractionated over a macroporous resin chromatography into 2 main fractions (I and II), and subsequently identified by high-performance liquid chromatography coupled with tandem mass spectrometry (HPLC-MS(2) ). Sixteen flavonoids were identified in lotus seed embryos, including 8 flavonoid C-glycosides and 8 flavonoid O-glycosides, in which the flavonoid C-glycosides were the main flavonoids. Among them, 2 flavonoid O-glycosides (luteolin 7-O-neohesperidoside and kaempferol 7-O-glucoside) were identified in lotus seed embryos for the 1st time...
June 20, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28630625/quantification-of-antioxidant-phenolic-compounds-in-a-new-chrysanthemum-cultivar-by-high-performance-liquid-chromatography-with-diode-array-detection-and-electrospray-ionization-mass-spectrometry
#11
Ah-Reum Han, Hyo Young Kim, Yangkang So, Bomi Nam, Ik-Soo Lee, Joo-Won Nam, Yeong Deuk Jo, Sang Hoon Kim, Jin-Baek Kim, Si-Yong Kang, Chang Hyun Jin
The flowers of Chrysanthemum morifolium Ramat. have been used as an herbal tea and in traditional medicine, and the plant has been developed to produce horticultural cultivars of various colors and shapes. In this study, a new chrysanthemum cultivar with dark purple petals (C. morifolium cv. ARTI-Dark Chocolate; ADC) was developed by radiation-induced mutation breeding of its original cultivar with purple striped white petals (C. morifolium cv. Noble Wine, NW). The phenolic profile and antioxidant property of ADC were investigated and compared with NW and the commercially available medicinal herb, C...
2017: International Journal of Analytical Chemistry
https://www.readbyqxmd.com/read/28629987/anti-herpes-simplex-virus-type-1-activity-of-houttuynoid-a-a-new-flavonoid-from-houttuynia-cordata-thunb
#12
Ting Li, Libao Liu, Hongling Wu, Shaodan Chen, Qinchang Zhu, Hao Gao, Xiongtao Yu, Yi Wang, Wenhan Su, Xinsheng Yao, Tao Peng
Early events in herpes simplex virus type 1 (HSV-1) infection reactivate latent human immunodeficiency virus, Epstein-Barr virus, and human papillomavirus in the presence of acyclovir (ACV). The common use of nucleoside analog medications, such as ACV and pencyclovir, has resulted in the emergence of drug-resistant HSV-1 strains in clinical therapy. Therefore, new antiherpetics that can inhibit early events in HSV-1 infection should be developed. An example of this treatment is Houttuynia cordata Thunb. water extract, which can inhibit HSV-1 infection through multiple mechanisms...
June 16, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28629861/flavonoids-determine-the-rate-of-fibrillogenesis-and-structure-of-collagen-type-i-fibrils-in-vitro
#13
Yuri A Kim, Yury S Tarahovsky, Sergei G Gaidin, Elena A Yagolnik, Eugeny N Muzafarov
Collagen fibrils are produced from collagen monomers not only in vivo, but also in vitro. The ability to have an influence on the structure and properties of fibrils may find medical application and can be useful for controlling the formation of collagen gels and sheets in tissue engineering. Here we investigated the influence of flavonoids, distinguished by the number of hydroxyl groups in the B-ring, on the formation of collagen fibrils. A correlation was found between the number of hydroxyl groups, lipophilicity of molecules and their ability to influence the fibril formation...
June 16, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28629407/antibacterial-activity-of-crude-extracts-of-some-south-african-medicinal-plants-against-multidrug-resistant-etiological-agents-of-diarrhoea
#14
Mary A Bisi-Johnson, Chikwelu L Obi, Babatunde B Samuel, Jacobus N Eloff, Anthony I Okoh
BACKGROUND: This study evaluated the antibacterial activity of some plants used in folklore medicine to treat diarrhoea in the Eastern Cape Province, South Africa. METHODS: The acetone extracts of Acacia mearnsii De Wild., Aloe arborescens Mill., A. striata Haw., Cyathula uncinulata (Schrad.) Schinz, Eucomis autumnalis (Mill.) Chitt., E. comosa (Houtt.) Wehrh., Hermbstaedtia odorata (Burch. ex Moq.) T.Cooke, Hydnora africana Thunb, Hypoxis latifolia Wight, Pelargonium sidoides DC, Psidium guajava L and Schizocarphus nervosus (Burch...
June 19, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28629389/cancer-chemoprevention-through-dietary-flavonoids-what-s-limiting
#15
REVIEW
Haneen Amawi, Charles R Ashby, Amit K Tiwari
Flavonoids are polyphenols that are found in numerous edible plant species. Data obtained from preclinical and clinical studies suggest that specific flavonoids are chemo-preventive and cytotoxic against various cancers via a multitude of mechanisms. However, the clinical use of flavonoids is limited due to challenges associated with their effective use, including (1) the isolation and purification of flavonoids from their natural resources; (2) demonstration of the effects of flavonoids in reducing the risk of certain cancer, in tandem with the cost and time needed for epidemiological studies, and (3) numerous pharmacokinetic challenges (e...
June 19, 2017: Chinese Journal of Cancer
https://www.readbyqxmd.com/read/28629287/anti-acetylcholinesterase-activity-and-antioxidant-properties-of-extracts-and-fractions-of-carpolobia-lutea
#16
Lucky Legbosi Nwidu, Ekramy Elmorsy, Jack Thornton, Buddhika Wijamunige, Anusha Wijesekara, Rebecca Tarbox, Averil Warren, Wayne Grant Carter
CONTEXT: There is an unmet need to discover new treatments for Alzheimer's disease. This study determined the anti-acetylcholinesterase (AChE) activity, DPPH free radical scavenging and antioxidant properties of Carpolobia lutea G. Don (Polygalaceae). OBJECTIVE: The objective of this study is to quantify C. lutea anti-AChE, DPPH free radical scavenging, and antioxidant activities and cell cytotoxicity. MATERIALS AND METHODS: Plant stem, leaves and roots were subjected to sequential solvent extractions, and screened for anti-AChE activity across a concentration range of 0...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28629212/a-study-of-the-modulating-action-of-quercetin-on-biochemical-and-histological-alterations-induced-by-lead-exposure-in-the-liver-and-kidney-of-rats
#17
Azza Sedky, Hany Elsawy
Lead is a highly toxic metal and a very potent poison. Lead poisoning is a serious condition but can be treated. Quercetin is a flavonoid with many beneficial uses. The aim of the present study was to investigate the possible modulating action of quercetin as a model of an antioxidant against the toxic effects of lead acetate on liver and kidneys of rats. Rats were randomly divided into four groups: (i) saline group (control); (ii) lead group received i.p. lead acetate (20 mg/kg b.w.); (iii) quercetin group received i...
June 30, 2017: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/28629116/systematic-review-of-chemical-constituents-in-the-genus-lycium-solanaceae
#18
REVIEW
Dan Qian, Yaxing Zhao, Guang Yang, Luqi Huang
The Lycium genus is widely used as a traditional Chinese medicine and functional food. Many of the chemical constituents of the genus Lycium were reported previously. In this review, in addition to the polysaccharides, we have enumerated 355 chemical constituents and nutrients, including 22 glycerogalactolipids, 29 phenylpropanoids, 10 coumarins, 13 lignans, 32 flavonoids, 37 amides, 72 alkaloids, four anthraquinones, 32 organic acids, 39 terpenoids, 57 sterols, steroids, and their derivatives, five peptides and three other constituents...
June 8, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28628996/pvp-and-peg-doped-cuo-nanoparticles-are-more-biologically-active-antibacterial-antioxidant-antidiabetic-and-cytotoxic-perspective
#19
Rabia Javed, Madiha Ahmed, Ihsan Ul Haq, Sobia Nisa, Muhammad Zia
Search for biologically active nanoparticles is prerequisite for biomedical applications. CuO nanoparticles synthesized by co-precipitation method are capped by polyethylene-glycol (PEG) and polyvinyl-pyrrolidone (PVP) on the surface by simple adsorption. Physical and chemical properties carried out by SEM, XRD and FTIR confirm nanometer in size and efficient capping of PVP and PEG on CuO NPs. Biological assays reveal higher activities of CuO-PEG and CuO-PVP as compared to the uncapped CuO nanoparticles. CuO-PEG shows better antitumor activity against Streptomyces as compared with CuO-PVP and CuO NPs...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28628830/breviscapine-bvp-inhibits-prostate-cancer-progression-through-damaging-dna-by-minichromosome-maintenance-protein-7-mcm-7-modulation
#20
Yang-Bo Guan, Dong-Rong Yang, Shao-Jun Nong, Jian Ni, Chun-Hui Hu, Jian Li, Jin Zhu, Yu-Xi Shan
Naturally occurring compounds are reported as effective candidates for prevention and treatment of various cancers. Breviscapine (BVP) is a mixture of flavonoid glycosides, derived from the Chinese herbs. Previous researches have indicated that BVP has comprehensive pharmacological functions. However, little is known about whether BVP has preventive effects on human prostate cancer. Here, we attempted to explore if BVP inhibits human prostate cancer in vitro and in vivo in a comprehensive manner. We found that BVP triggered cytotoxicity in prostate cancer cell lines dose-dependently...
June 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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