Read by QxMD icon Read


Yi Tao, Dandan Su, Weidong Li, Baochang Cai
A sensitive UHPLC-MS/MS approach was developed and validated for the quantification of genkwanin, 3'-hydroxygenkwanin, apigenin, luteolin, yuanhuacine and genkwadaphnin in biological samples after oral administration of raw and vinegar-processed Daphne genkwa. Liquiritin and glycyrrhetinic acid were employed as internal standards. Six components were extracted by using protein precipitation with acetonitrile. Chromatographic separation was achieved on a Waters BEH C 18 column (50 mm × 2.1 mm, 1.7 μm) by using a mobile phase composed of water (containing 0...
February 7, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
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
Qiqi Zhu, Fei Ge, Yaoyao Dong, Wei Sun, Zhe Wang, Yuanyuan Shan, Ruijie Chen, Jianliang Sun, Ren-Shan Ge
Many flavonoids and isoflavonoids have anti-diabetic effects in animal models. However, the mechanisms that are involved are generally unclear. Since 11β-hydroxysteroid dehydrogenases (HSD11Bs) play important roles in diabetes, we hypothesize that flavonoids and isoflavonoids may affect diabetes by targeting two isoforms of HSD11B differently. The inhibitory effects of flavonoids (apigenin and quercetin) and isoflavonoids [genistein and (±) equol] on rat and human HSD11B1 and HSD11B2 were analyzed. The potencies of inhibition on human HSD11B1 reductase was in the order of apigenin > quercetin > genistein > (±) equol, with IC50 values of 2...
February 6, 2018: Steroids
Eswar Shankar, Aditi Goel, Karishma Gupta, Sanjay Gupta
Research in cancer chemoprevention provides convincing evidence that increased intake of vegetables and fruits may reduce the risk of several human malignancies. Phytochemicals present therein provide beneficial anti-inflammatory and antioxidant properties that serve to improve the cellular microenvironment. Compounds known as flavonoids categorized anthocyanidins, flavonols, flavanones, flavonols, flavones, and isoflavones have shown considerable promise as chemopreventive agents. Apigenin (4', 5, 7-trihydroxyflavone), a major plant flavone, possessing antioxidant, anti-inflammatory, and anticancer properties affecting several molecular and cellular targets used to treat various human diseases...
December 2017: Current Pharmacology Reports
Seema Menon, Lincy Lawrence, Vipin P Sivaram, Jose Padikkala
BACKGROUND: Oroxylum indicum Vent., a Dasamula plant used in Ayurveda possesses antioxidant properties. OBJECTIVES: To evaluate the cardioprotective effect of 70% methanolic extract of O. indicum Vent. root bark (OIM) against doxorubicin induced cardiomyopathy in female Sprague Dawley rats. MATERIALS AND METHODS: Cardiotoxicity was induced by intra-peritoneal injection of doxorubicin 30 mg/kg body weight (b.w.) for 4 consecutive days after a ten-day pre-treatment of animals with OIM at 200 mg/kg b...
February 2, 2018: Journal of Ayurveda and Integrative Medicine
L Melguizo-Rodríguez, F J Manzano-Moreno, E De Luna-Bertos, A Rivas, J Ramos-Torrecillas, C Ruiz, O García-Martínez
BACKGROUND: Osteoporosis is a skeletal disorder characterized by compromised bone strength that predisposes individuals to an increased risk of fracture. Previous in vivo and in vitro studies have reported that phenolic compounds present in extra virgin olive oil have a beneficial effect on osteoblasts in terms of increase cell proliferation. The aim of this study was to determine whether phenolic compounds present in olive oil could modify the expression of cell differentiation markers on osteoblasts...
February 2, 2018: European Journal of Clinical Investigation
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
Xiaonan Liu, Jian Cheng, Guanghui Zhang, Wentao Ding, Lijin Duan, Jing Yang, Ling Kui, Xiaozhi Cheng, Jiangxing Ruan, Wei Fan, Junwen Chen, Guangqiang Long, Yan Zhao, Jing Cai, Wen Wang, Yanhe Ma, Yang Dong, Shengchao Yang, Huifeng Jiang
The flavonoid extract from Erigeron breviscapus, breviscapine, has increasingly been used to treat cardio- and cerebrovascular diseases in China for more than 30 years, and plant supply of E. breviscapus is becoming insufficient to satisfy the growing market demand. Here we report an alternative strategy for the supply of breviscapine by building a yeast cell factory using synthetic biology. We identify two key enzymes in the biosynthetic pathway (flavonoid-7-O-glucuronosyltransferase and flavone-6-hydroxylase) from E...
January 31, 2018: Nature Communications
Spyros Grigorakis, Dimitris P Makris
Background: The aromatic plant Stachys mucronata (Lamiaceae) is endemic to the island of Crete (southern Greece), but as opposed to other native Greek members of this family, this species has never been investigated in the past with regard to its polyphenolic composition and antioxidant potency. Methods: Aerial parts of S. mucronata were exhaustively extracted and partly fractionated through partition, using n-butanol and dichloromethane. Results: Following an initial examination, which consisted of estimating the total polyphenol content and the antiradical activity, the n-butanol extract was found to be by far the richest in polyphenols, exhibiting much stronger antiradical activity compared with the dichloromethane counterpart...
January 27, 2018: Medicines (Basel, Switzerland)
Oluwafemi Adeleke Ojo, Adebola Busola Ojo, Basiru Olaitan Ajiboye, Babatunji Emmanuel Oyinloye, Ayodele Jacob Akinyemi, Mary Abiola Okesola, Aline Augusti Boligon, Marli Matiko Anraku de Campos
BACKGROUND: Irvingia gabonensis stem bark is a medicinal plant used in most parts of Africa to manage a number of ailments including neurodegenerative diseases that occur without scientific basis. This work characterized the phenolic composition, evaluated the cholinergic enzymes (acetylcholinesterase, AChE and butyrylcholinesterase, BChE) inhibition, and assessed the antioxidant activity of phenolic extracts from I. gabonensis (Aubry-Lecomte ex O'Rorke) Baill bark. METHODS: Total phenol and flavonoids content was evaluated in addition to antioxidant activity as shown by Fe2+ chelation, 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging ability, and 2,2-azino-bis-(3-ethylbenthiazoline-6-sulfonic acid) (ABTS) radical scavenging ability...
January 30, 2018: Journal of Basic and Clinical Physiology and Pharmacology
Nguyen Huy Thuan, Amit Kumar Chaudhary, Duong Van Cuong, Nguyen Xuan Cuong
Microbial cells have extensively been utilized to produce value-added bioactive compounds. Based on advancement in protein engineering, DNA recombinant technology, genome engineering, and metabolic remodeling, the microbes can be re-engineered to produce industrially and medicinally important platform chemicals. The emergence of co-culture system which reduces the metabolic burden and allows parallel optimization of the engineered pathway in a modular fashion restricting the formation of undesired byproducts has become an alternative way to synthesize and produce bioactive compounds...
January 24, 2018: Journal of Industrial Microbiology & Biotechnology
L Cornara, A P Fortuna-Perez, I Bruni, A Salis, G Damonte, B Borghesi, M Clericuzio
Dried herbal preparations, based on "Zornia latifolia," are commonly sold on web, mainly for their supposed hallucinogenic properties. In this work, we demonstrate that these commercial products contain a different Fabacea, i.e., Stylosanthes guianensis, a cheaper plant, widely cultivated in tropical regions as a fodder legume. We were provided with plant samples of true Zornia latifolia from Brazil, and carried out a thorough comparison of the two species. The assignment of commercial samples was performed by means of micro-morphological analysis, DNA barcoding, and partial phytochemical investigation...
January 23, 2018: International Journal of Legal Medicine
Takashi Matsumoto, Atsushi Kaneko, Junichi Koseki, Yosuke Matsubara, Setsuya Aiba, Kenshi Yamasaki
Recent studies have demonstrated that flavonoid glucuronides can be deconjugated to the active form aglycone by β-glucuronidase-expressing macrophages. Keigairengyoto (KRT) is a flavonoid-rich traditional Japanese medicine reported to enhance bacterial clearance through immune modulation. Our aims are to examine the pharmacokinetics of KRT flavonoids and to identify active flavonoids contributing to the adjuvant effects of KRT. KRT was evaluated at pharmacokinetic analysis to quantify absorbed flavonoids, and cutaneous infection assay induced in mice by inoculation of Staphylococcus aureus...
January 23, 2018: International Journal of Molecular Sciences
Guangyan Du, Lingling Fu, Jun Jia, Xu Pang, Haiyang Yu, Youcai Zhang, Guanwei Fan, Xiumei Gao, Lifeng Han
A rapid, sensitive and specific ultra high performance liquid chromatography coupled with tandem mass spectrometry (UPLC-MS/MS) method was developed to investigate the pharmacokinetics and tissue distribution of Eclipta prostrata extract. Rats were orally administrated the 70% ethanol extract of E. prostrata, and their plasma as well as various organs were collected. The concentrations of seven main compounds, including ecliptasaponin IV, ecliptasaponin A, apigenin, 3'-hydroxybiochanin A, luteolin, luteolin-7-O-glucoside, and wedelolactone, were quantified by UPLC-MS/MS through multiple reactions monitoring (MRM) method...
January 19, 2018: Biomedical Chromatography: BMC
Heejeong Lee, Eun-Rhan Woo, Dong Gun Lee
Apigenin, a natural flavone, has been well characterized for its their anticarcinogenic property; however, its bioactivity against pathogenic fungi has not been investigated in detail. In the present study, we examined the antifungal activity and mode of action of apigenin. Apigenin inhibited the growth of fungal pathogens, which induced superficial infection and reduced biofilm mass. Three-dimensional flow cytometric analysis demonstrated that apigenin induced morphological changes, especially cell shrinkage, in Candida albicans...
January 16, 2018: FEMS Yeast Research
Queli Cristina Fidelis, Immacolata Faraone, Daniela Russo, Francisco Eduardo Aragão Catunda-Jr, Lisiana Vignola, Mario Geraldo de Carvalho, Nunziatina de Tommasi, Luigi Milella
The study aimed to evaluate in vitro antioxidant, anticholinesterase and antidiabetic properties of Ouratea hexasperma (A. St.-Hil.) Baill. The inflorescence methanol extract and the ethyl acetate fraction of leaves and stems reported the highest Relative Antioxidant Capacity Index (RACI), whereas the dichloromethane fraction of leaves was the best inhibitor of α-amylase and α-glucosidase. Trans-3-O-methyl-resveratrol-2-C-β-glucoside, lithospermoside, 2,5-dimethoxy-p-benzoquinone, lup-20(30)-ene-3β,28-diol, 7-O-methylgenistein, apigenin and luteolin and amentoflavone were isolated from O...
January 16, 2018: Natural Product Research
Irina Fierascu, Camelia Ungureanu, Sorin Marius Avramescu, Carmen Cimpeanu, Mihaela Ioana Georgescu, Radu Claudiu Fierascu, Alina Ortan, Anca Nicoleta Sutan, Valentina Anuta, Anca Zanfirescu, Cristina Elena Dinu-Pirvu, Bruno Stefan Velescu
BACKGROUND: Juniperus communis L. represents a multi-purpose crop used in the pharmaceutical, food, and cosmetic industry. Several studies present the possible medicinal properties of different Juniperus taxa native to specific geographical area. The present study aims to evaluate the genoprotective, antioxidant, antifungal and anti-inflammatory potential of hydroalcoholic extract of wild-growing Juniperus communis L. (Cupressaceae) native to Romanian southern sub-Carpathian hills. METHODS: The prepared hydroethanolic extract of Juniperus communis L...
January 4, 2018: BMC Complementary and Alternative Medicine
Ágnes M Móricz, Dariusz Szeremeta, Magdalena Knaś, Ewa Długosz, Péter G Ott, Teresa Kowalska, Mieczysław Sajewicz
The main aim of this study was to detect and identify antibacterial components of fraction I derived from eleven commercial C. incanus herbal teas. Fraction I obtained by a well-established phytochemical protocol of a multi-step extraction was expected to contain flavonoid aglycons alone. Antibacterial profile of fraction I was demonstrated by means of thin-layer chromatography - direct bioautography (TLC-DB) using a Gram positive B. subtilis and a Gram negative A. fischeri strain. Six chromatographic zones of fraction I exhibited a well pronounced antibacterial potential...
December 23, 2017: Journal of Chromatography. A
Amani Mahbub, Christine Le Maitre, Sarah Haywood-Small, Neil Cross, Nicola Jordan-Mahy
Polyphenols have been previously shown to sensitize leukemia cell lines to topoisomerase inhibitors. Here, we assess the effects of five polyphenols when used alone and in combination with antimetabolites: methotrexate, 6-mercaptopurine and 5-fluorouracil; in lymphoid and myeloid leukemia cells lines, and non-tumor control cells. The effects of combined treatments were investigated on ATP and glutathione levels, cell-cycle progression, DNA damage and apoptosis. Polyphenols antagonized methotrexate and 6-mercaptopurine induced cell-cycle arrest and apoptosis in most leukemia cell lines...
December 1, 2017: Oncotarget
Yang Liu, Xiuheng Liu, Lei Wang, Yang Du, Zhiyuan Chen, Hui Chen, Jia Guo, Xiaodong Weng, Xiao Wang, Ming Wang, Zhishun Wang
The aim of the present study was to investigate the effect and possible mechanism of apigenin on renal ischemia-reperfusion (I/R) injury in rats, as well as in in vitro experiments. In total, 36 rats were subjected to 45 min of renal ischemia, with or without treatment prior to ischemia with different concentrations of apigenin (2, 10 and 50 mg/kg) administered intravenously. All rats were sacrificed at 24 h after I/R injury. The serum creatinine (Cr) and blood urea nitrogen (BUN) levels were analyzed, and histological examination was conducted...
December 2017: Experimental and Therapeutic Medicine
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"