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https://www.readbyqxmd.com/read/29166540/statistical-optimization-of-an-rp-hplc-method-for-the-determination-of-selected-flavonoids-in-berry-juices-and-evaluation-of-their-antioxidant-activities
#1
Andrija Ciric, Milena Jelikic-Stankov, Milica Cvijovic, Predrag Djurdjevic
An isocratic RP-HPLC method for the separation and identification of selected flavonoids (quercetin, rutin, luteolin-7-O-glucoside, kaempferol, and kaempferol-3-O-glucoside) in commercial berries juices (blackcurrant, blueberry, red raspberry and cherry) was developed with the aid of central composite design and response surface methodology. The optimal separation conditions were a mobile phase of 85:15 (% v/v) water/acetonitrile, pH of 2.8 (adjusted with formic acid), flow rate 0.5 mL/min and column temperature of 35 °C...
November 22, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29156292/dietary-luteolin-protects-against-hgcl2-induced-renal-injury-via-activation-of-nrf2-mediated-signaling-in-rat
#2
Xiao Tan, Biying Liu, Jingjing Lu, Siyu Li, Ruiqi Baiyun, Yueying Lv, Qian Lu, Zhigang Zhang
Luteolin (Lut) belongs to the flavonoid family with various beneficial bioactivities. Here, we investigated whether Lut attenuate mercuric chloride (HgCl2)-induced renal injury in rat. We found that oral gavage administration of Lut (80mg/kg) alleviated anemia and renal histology upon HgCl2 treatment (80mg/L). Lut also significantly reduced HgCl2-induced oxidative stress and inflammatory, presenting as the reduced malondialdehyde (MDA) formation, increased glutathione (GSH) level, and inhibited activation of nuclear factor kappa B (NF-κB)...
November 9, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29154864/hydroxycinnamoylmalated-flavone-c-glycosides-from-lemna-japonica
#3
Huan-Huan Bai, Ni-Ni Wang, Jiao Mi, Tao Yang, Dong-Mei Fang, Lin-Wei Wu, Hai Zhao, Guo-You Li
Three previously undescribed flavone C-glycosides (1-3), along with seven known ones (4-10), were isolated and characterized from the smallest flowering aquatic plant, Lemna japonica. On the basis of spectroscopic analysis and alkaline hydrolysis, compounds 1-3 were identified to be luteolin 6-C-(2″-O-trans-caffeoyl-d-malate)-β-glucoside (1), apigenin 6-C-(2″-O-trans-caffeoyl-d-malate)-β-glucoside (2), and luteolin 6-C-(2″-O-trans-coumaroyl-d-malate)-β-glucoside (3). Compounds 1-3 are characteristic of a trans-coumaroyl-d-malate or trans-caffeoyl-d-malate linked to C-2″ of the glucose, which was reported for the first time...
November 14, 2017: Fitoterapia
https://www.readbyqxmd.com/read/29152635/profiling-polyphenol-composition-by-hplc-dad-esi-msn-and-the-antibacterial-activity-of-infusion-preparations-obtained-from-four-medicinal-plants
#4
Borhane E C Ziani, Lillian Barros, Ali Z Boumehira, Khaldoun Bachari, Sandrina A Heleno, Maria Jose Alves, Isabel C F R Ferreira
The infusions of Thymus pallescens Noë, Saccocalyx satureioides Coss. et Dur., Ptychotis verticillata Briq. and Limoniastrum guyonianum Boiss. have been used as medicinal remedies for many diseases in Algerian folk medicine. These species have also been well documented as rich sources of phytochemicals, such as phenolic compounds with wide diversified chemical structures, which exhibit far-ranging biological activities. Thus, the phenolic compound profile of the aqueous extracts, obtained by infusing, of the mentioned species was obtained by HPLC-DAD-ESI/MS, and their antibacterial activity was evaluated against clinical isolates...
November 20, 2017: Food & Function
https://www.readbyqxmd.com/read/29150282/artesunate-quercetin-luteolin-dual-drug-nanofacilitated-synergistic-treatment-for-malaria-a-plausible-approach-to-overcome-artemisinin-combination-therapy-resistance
#5
Nethravathi Puttappa, Raman Suresh Kumar, Karthik Yamjala
Malaria is one of the major global health challenge with 300 million new cases annually. The best regimen for treating Plasmodium falciparum induced malaria is based on artemisinin and its derivatives which were prescribed as artemisinin combination therapy (ACT). These are highly effective drugs resulting in rapid clearance of parasites even in severe P. falciparum induced malaria patients. However, from the past few years parasites resistant to ACT's have begun to emerge in various parts of the world such as Cambodia and Greater Mekong Subregion...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29142311/a-standardized-herbal-extract-mitigates-tumor-inflammation-and-augments-chemotherapy-effect-of-docetaxel-in-prostate-cancer
#6
Chin-Hsien Tsai, Sheue-Fen Tzeng, Shih-Chuan Hsieh, Yu-Chih Yang, Yi-Wen Hsiao, Mong-Hsun Tsai, Pei-Wen Hsiao
Activation of the NFκB pathway is often associated with advanced cancer and has thus been regarded as a rational therapeutic target. Wedelia chinensis is rich in luteolin, apigenin, and wedelolactone that act synergistically to suppress androgen receptor activity in prostate cancer. Interestingly, our evaluation of a standardized Wedelia chinensis herbal extract (WCE) concluded its efficacy on hormone-refractory prostate cancer through systemic mechanisms. Oral administration of WCE significantly attenuated tumor growth and metastasis in orthotopic PC-3 and DU145 xenografts...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29128789/diuretic-and-natriuretic-effect-of-luteolin-in-normotensive-and-hypertensive-rats-role-of-muscarinic-acetylcholine-receptors
#7
Thaise Boeing, Luísa Mota da Silva, Marihá Mariott, Sérgio Faloni de Andrade, Priscila de Souza
BACKGROUND: Luteolin is a very common phenolic compound found in a wide variety of natural products. Although several biological properties have already been described regarding the beneficial effect of luteolin in the cardiovascular and renal system, no scientific research explored its potential effect as a diuretic agent in experimental trials. METHODS: Groups of male normotensive (NTR) and spontaneously hypertensive rats (SHR) were orally treated with vehicle, hydrochlorothiazide or luteolin...
May 24, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29121796/absorption-properties-of-luteolin-and-apigenin-in-genkwa-flos-using-in-situ-single-pass-intestinal-perfusion-system-in-the-rat
#8
Xin He, Zi-Jing Song, Cui-Ping Jiang, Chun-Feng Zhang
The flower bud of Daphne genkwa (Genkwa Flos) is a commonly used herbal medicine in Asian countries. Luteolin and apigenin are two recognized active flavonoids in Genkwa Flos. The aim of this study was to investigate the intestinal absorption mechanisms of Genkwa Flos flavonoids using in situ single-pass intestinal perfusion rat model. Using HPLC, we determined its major effective flavonoids luteolin, apigenin, as well as, hydroxygenkwanin and genkwanin in biological samples. The intestinal absorption mechanisms of the total flavonoids in Genkwa Flos (TFG) were investigated using in situ single-pass intestinal perfusion rat model...
November 9, 2017: American Journal of Chinese Medicine
https://www.readbyqxmd.com/read/29115570/luteolin-inhibits-multi-heavy-metal-mixture-induced-hl7702-cell-apoptosis-through-downregulation-of-ros-activated-mitochondrial-pathway
#9
Yafei Wang, Hong Su, Xin Song, Samuel Selorm Fiati Kenston, Jinshun Zhao, Yuanliang Gu
With the rapid economic development in recent years, China is facing a great challenge due to heavy metal pollution. The heavy metals may enter the human body through ingestion of aqua products to cause great health risks. In the present study, the inhibitory effects of luteolin on the combined toxicity of multi-heavy metals (including zinc, manganese, lead, copper, cadmium, mercury, chromium and nickel) were investigated in HL7702 hepatocyte cells. An MTT assay demonstrated that 20 µM luteolin significantly alleviated the multi-heavy metal mixture-induced cell death and morphological changes...
October 27, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29113064/inhibition-of-cyclic-adenosine-monophosphate-specific-phosphodiesterase-by-various-food-plant-derived-phytotherapeutic-agents
#10
Teresa Röhrig, Olga Pacjuk, Silvia Hernández-Huguet, Johanna Körner, Katharina Scherer, Elke Richling
Background: Phosphodiesterases (PDEs) play a major role in the regulation of cyclic adenosine monophosphate (cAMP)- and cyclic guanosine monophosphate (cGMP)-mediated pathways. Their inhibitors exhibit anti-inflammatory, vasodilatory and antithrombotic effects. Therefore, consumption of foods with PDE-inhibiting potential may possess beneficial influence on the risk of cardiovascular diseases. Methods: Four plant extracts (Arbutus unedo, Camellia sinensis, Cynara scolymus, Zingiber officinale) with promising ingredient profiles and physiological effects were tested for their ability to inhibit cAMP-specific PDE in vitro in a radioactive assay...
November 4, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/29111589/effect-of-in-vitro-digestion-on-the-total-antioxidant-capacity-and-phenolic-content-of-3-species-of-oregano-hedeoma-patens-lippia-graveolens-lippia-palmeri
#11
Erick Paul Gutiérrez-Grijalva, Miguel Angel Angulo-Escalante, Josefina León-Félix, J Basilio Heredia
Oregano phenolic compounds have been studied for their anti-inflammatory properties. Nonetheless, after ingestion, the gastrointestinal environment can affect their antioxidant stability and thus their bioactive properties. To evaluate the effect of in vitro gastrointestinal (GI) digestion on the phenolic compounds of 3 species of oregano (Hedeoma patens, Lippia graveolens, and Lippia palmeri), the total reducing capacity, total flavonoid content, and antioxidant capacity were evaluated before and after in vitro GI digestion...
November 7, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/29111190/chemical-composition-antioxidant-and-antibacterial-activities-of-essential-oil-and-methanol-extract-of-artemisia-vulgaris-and-gaultheria-fragrantissima-collected-from-nepal
#12
Bishnu Prasad Pandey, Rupak Thapa, Anil Upreti
OBJECTIVE: To identify the chemical constituents and biological activities of essential oil and crude methanol extract of Artemisia vulgaris (A. vulgaris) and Gaultheria fragrantissima (G. fragrantissima). METHODS: Phytochemical screening, total phenolic and flavonoid content, antibacterial activities, anti-oxidant assay of the crude extract were carried out to identify the biological activities and phytonutrients present in the extract. Furthermore, the chemical constituents present in the essential oil and crude methanol extract were analyzed using gas chromatography mass spectroscopy and high performance liquid chromatography (HPLC) analysis...
October 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/29109370/olive-olea-europaea-l-biophenols-a-nutriceutical-against-oxidative-stress-in-sh-sy5y-cells
#13
Syed Haris Omar, Philip G Kerr, Christopher J Scott, Adam S Hamlin, Hassan K Obied
Plant biophenols have been shown to be effective in the modulation of Alzheimer's disease (AD) pathology resulting from free radical-induced oxidative stress and imbalance of the redox chemistry of transition metal ions (e.g., iron and copper). On the basis of earlier reported pharmacological activities, olive biophenols would also be expected to have anti-Alzheimer's activity. In the present study, the antioxidant activity of individual olive biophenols (viz. caffeic acid, hydroxytyrosol, oleuropein, verbascoside, quercetin, rutin and luteolin) were evaluated using superoxide radical scavenging activity (SOR), hydrogen peroxide (H₂O₂) scavenging activity, and ferric reducing ability of plasma (FRAP) assays...
October 29, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29108086/anti-degenerative-effect-of-apigenin-luteolin-and-quercetin-on-human-keratinocyte-and-chondrocyte-cultures-sar-evaluation
#14
Lucia Crascì, Venera Cardile, Giusy Longhitano, Francesco Nanfitò, Annamaria Panico
Background Inflammation is a dynamic process that occur on vascularized tissue in response to different stimuli causing cell injury and tissue degeneration. Reactive oxygen and nitrogen species (ROS and RNS) and advanced glycation end products (AGEs) have a key mediatory role in the development and progression of degenerative tissue process. The bioflavonoids possess a broad-spectrum of pharmacological activities. Their capability is related to their chemical structure. Methods In this study we evaluated and compare antioxidant, anti-glycative and anti-degenerative actions of two flavones apigenin and luteolin and a flavonol quercetin, in function of their hydroxyl groups arrangement...
November 6, 2017: Drug Research
https://www.readbyqxmd.com/read/29103419/marker-based-standardization-and-investigation-of-nutraceutical-potential-of-indian-propolis
#15
Nanaware Sadhana, Sathiyanarayanan Lohidasan, Kakasaheb Ramoo Mahadik
OBJECTIVE: Propolis, a resinous material collected by honey bees from various plants, has been explored globally for its medicinal and nutritional properties. However, research over Indian propolis is at infancy. This study was designed to investigate nutraceutical potential of Indian propolis. METHODS: In the present study, propolis extract was standardized with respect to markers caffeic acid phenethyl ester, caffeic acid, galangin, luteolin, curcumin, apigenin, pinocembrin and quercetin by new high-performance thin-layer chromatographic (HPTLC) methods...
November 2017: Journal of Integrative Medicine
https://www.readbyqxmd.com/read/29100934/chemical-characterization-and-cytotoxic-genotoxic-and-mutagenic-properties-of-baccharis-trinervis-lam-persoon-from-colombia-and-brazil
#16
Victoria Jaramillo-García, Cristiano Trindade, Elisiane Lima, Temenouga N Guecheva, Izabel Villela, Wilner Martinez-Lopez, Dione S Corrêa, Alexandre de B F Ferraz, Sidnei Moura, Milton Quintana Sosa, Juliana Da Silva, João Antônio Pegas Henriques
PHARMACOLOGY RELEVANCE: Baccharis trinervis leaves are used in the traditional medicine for the treatment of high fevers, edema, inflammation, sores and muscle cramps, snakebites and as antiseptics. AIM OF THE STUDY: To investigate the cytotoxic, genotoxic, and mutagenic effects of extracts and fractions of B. trinervis from Brazil and Colombia in Chinese Hamster Ovary (CHO) cells, as well as the mutagenic activity in Salmonella typhimurium. MATERIAL AND METHODS: Aqueous extracts (AE) of aerial parts of B...
October 31, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29097115/cytochrome-p450-cyp1-metabolism-of-hydroxylated-flavones-and-flavonols-selective-bioactivation-of-luteolin-in-breast-cancer-cells
#17
Nicola E Wilsher, Randolph R Arroo, Minos-Timotheos Matsoukas, Aristidis M Tsatsakis, Demetrios A Spandidos, Vasilis P Androutsopoulos
Natural flavonoids with methoxy substitutions are metabolized by CYP1 enzymes to yield the corresponding demethylated products. The present study aimed to characterize the metabolism and further antiproliferative activity of the hydroxylated flavonoids apigenin, luteolin, scutellarein, kaempferol and quercetin in CYP1 recombinant enzymes and in the CYP1 expressing cell lines MCF7 and MDA-MB-468, respectively. Apigenin was converted to luteolin and scutellarein, whereas kaempferol was metabolized only to quercetin by recombinant CYP1 enzymes...
October 31, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29092648/tempo-phosphate-as-an-esr-tool-to-study-phosphate-transport
#18
Izabela Sadowska-Bartosz, Ireneusz Stefaniuk, Bogumił Cieniek, Grzegorz Bartosz
TEMPO-phosphate has been introduced as a phosphate analogue to study phosphate transport in erythrocytes. The nitroxide is reduced intracellularly upon entering the cells, the membrane transport being the rate-limiting step of the loss of ESR signal. The use of TEMPO-phosphate is convenient and avoids the hazard of radioactivity. We studied the inhibition of TEMPO-phosphate transport to human erythrocytes by various compounds. DIDS and SITS, inhibitors of Band 3, inhibited the TEMPO-phosphate transport. 1-cyano-4-hydroxycinnamic acid, inhibitor of monocarboxylate transporters, did not affect the permeation of TEMPO-phosphate...
November 1, 2017: Free Radical Research
https://www.readbyqxmd.com/read/29091881/phytochemical-profile-and-mechanisms-involved-in-the-anti-nociception-caused-by-the-hydroethanolic-extract-obtained-from-tocoyena-formosa-cham-schltdl-k-schum-jenipapo-bravo-leaves-in-mice
#19
Francisco Rafael Alves Santana Cesário, Thaís Rodrigues de Albuquerque, Giovana Mendes de Lacerda, Maria Rayane Correia de Oliveira, Lindaiane Bezerra Rodrigues, Anita Oliveira Brito Pereira Bezerra Martins, Aline Augusti Boligon, Lucindo José Quintans Júnior, Adriano Antunes de Souza Araújo, Mariana Lima Vale, Henrique Douglas Melo Coutinho, Irwin Rose Alencar de Menezes
Tocoyena formosa, a small ornamental tree growing in the dry regions of central Brazil, is commonly known as 'genipapo do bravo'. This is a medicinal plant traditionally used as an analgesic for rheumatic pain, lower back pain and myalgia, however its use is carried out without scientific evidence, which thus justifies the development of studies to investigate and prove its therapeutic potential. Therefore, the objective of this study was to evaluate the phytochemical profile of Tocoyena formosa (Cham. & Schlecht...
October 26, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29082695/-study-on-relationship-between-efficacy-against-lung-cancer-and-different-parts-of-schizonepeta-tenuifolia-based-on-microfluidic-chip-technology
#20
Jia-Xin Fan, Yong-Rui Bao, Xian-Sheng Meng, Shuai Wang, Tian-Jiao Li
In order to further clarify the rational use of different medicinal parts of Schizonepeta, microfluidic technology was used in this study to investigate the differences in drug efficacy against lung cancer in vitro. The ethanol extracts were examined with HPLC to establish their fingerprints in order to analyze the relationship between the spectrum and efficacy index through Grey Correlation software, and a rapid HPLC-Q-TOF/MS method was established. The result in vitro shows that the effect and components of different medicinal parts had a certain differences, and apoptosis and necrosis rate from big to small in turn is leaf, flower, root, stem...
May 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
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