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chlorogenic acid

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https://www.readbyqxmd.com/read/28344475/antiproliferative-and-apoptotic-effect-of-morus-nigra-extract-on-human-prostate-cancer-cells
#1
Ibrahim Turan, Selim Demir, Kagan Kilinc, Nesibe Arslan Burnaz, Serap Ozer Yaman, Kubra Akbulut, Ahmet Mentese, Yuksel Aliyazicioglu, Orhan Deger
Background: Morus nigra L. belongs to the family Moraceae and is frequently used in traditional medicine. Numerous studies have investigated the antiproliferative effects of various extracts of different Morus species, but studies involving the in vitro cytotoxic effect of M. nigra extract are very limited. The purpose of this study was to evaluate the phenolic composition and antioxidant activity of dimethyl sulfoxide extract of M. nigra (DEM) and to investigate, for the first time, the probable cytotoxic effect in human prostate adenocarcinoma (PC-3) cells together with the mechanism involved...
February 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/28343034/bioactivities-of-achillea-phrygia-and-bupleurum-croceum-based-on-the-composition-of-phenolic-compounds-in-vitro-and-in-silico-approaches
#2
Gokhan Zengin, Gizem Bulut, Adriano Mollica, Mehmet Zeki Haznedaroglu, Ahmet Dogan, Abdurrahman Aktumsek
This study presents the effects of the Achillea phrygia Boiss. et Bal. and Bupleurum croceum Fenzl. extracts obtained by different solvents (ethyl acetate, methanol and water) on selected enzyme inhibitory effects and antioxidant ability with screening bioactive compounds. Total and individual bioactive compounds were detected by spectrophotometric and HPLC-DAD techniques. Antioxidant abilities were evaluated by different methods including free radical scavenging (ABTS and DPPH), reducing power (CUPRAC and FRAP), phosphomolybdenum and metal chelating...
March 22, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28340725/biomonitored-uhplc-esi-qtof-ms-2-and-hplc-uv-thermostability-study-of-the-aerial-parts-of-sphagneticola-trilobata-l-pruski-asteraceae
#3
Keline Lang, Jessica Corrêa, Fellippe Wolff, Gislaine Franciele da Silva, Angela Malheiros, Valdir Cechinel Filho, Ruth Meri Lucinda Silva, Nara Lins Meira Quintão, Louis P Sandjo, Tiago J Bonomini, Tania Mari Bellé Bresolin
As the temperature of extraction and processing could impact the biological effects of herbal extracts, which have wide chemical diversity, the aim of this work were to investigate the thermostability of herbal derivatives of the aerial parts of Sphagneticola trilobata, a reputed medicinal plant; to biomonitor its oral anti-hyperalgesic effect; and to elucidate the degradation pathways of the major components by UHPLC-ESI-QTOF-MS. The lipophilic markers (kaurenoic acid-KA) and hydrophilic markers [chlorogenic acids; measured as total phenolic compounds (PC), expressed in caffeic acid] were also monitored through a validated HPLC-UV methodology, suitable for quality control and stability studies...
May 15, 2017: Talanta
https://www.readbyqxmd.com/read/28335967/an-innovative-monolithic-zwitterionic-stationary-phase-for-the-separation-of-phenolic-acids-in-coffee-bean-extracts-by-capillary-electrochromatography
#4
Adele Murauer, Rania Bakry, Herwig Schottenberger, Christian Huck, Markus Ganzera
A methacrylate based monolith, containing the innovative zwitterionic monomer (3-allyl-1-imidazol)propane sulfonate, was prepared in 100 μm I.D. silica capillaries by UV initiated photo-polymerization. Composition of the porogen, i.e. a mixture of 1-propanol, 1,4 butanediol and water, was of great importance to obtain a homogeneous monolith with satisfactory permeability and good electrochromatographic performance. Morphology of the stationary phase was studied in Scanning Electron Microscopy and IR experiments, which revealed a good attachment to the capillary wall, flowthrough-pores in the range of 0...
April 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28334920/spe-hplc-determination-of-chlorogenic-and-phenolic-acids-in-coffee
#5
Pelin Köseoglu Yilmaz, Ufuk Kolak
A new solid phase extraction-high-performance liquid chromatography method with ultraviolet detection was developed and validated for the determination of three chlorogenic acids (5-O-caffeoylquinic, 3-O-caffeoylquinic and 4-O-caffeoylquinic acids) and six phenolic acids (caffeic, ferulic, sinapic, protocatechuic, p-hydroxybenzoic acid (PHBA) and vanillic acid (VA)) in coffee bean samples. Extraction was performed using hydrophilic-lipophilic balance cartridges. Separations were accomplished using a C18 guard column (10 × 2...
March 18, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28334650/ultrasensitive-determination-of-dna-oxidation-products-by-gas-chromatography-tandem-mass-spectrometry-and-the-role-of-antioxidants-in-the-prevention-of-oxidative-damage
#6
Sam Dawbaa, Önder Aybastıer, Cevdet Demir
Oxidative stress is considered as one of the significant causes of DNA damage which in turn contributes to cell death through a series of intermediate processes such as cancer formation, mutation, and aging. Natural sources such as plant and fruit products have provided us with interesting substances of antioxidant activity that could be recruited in protecting the genetic materials of the cells. This study is an effort to discover some of those antioxidants effects in their standard and natural forms by performing an ultrasensitive determination of the products of DNA oxidation using GC-MS/MS...
March 16, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28326319/inhibitory-activities-of-stauntonia-hexaphylla-leaf-constituents-on-rat-lens-aldose-reductase-and-formation-of-advanced-glycation-end-products-and-antioxidant
#7
Seung Hwan Hwang, Shin Hwa Kwon, Set Byeol Kim, Soon Sung Lim
Stauntonia hexaphylla (Thunb.) Decne. (Lardizabalaceae) leaves (SHL) have been used traditionally as analgesics, sedatives, diuretics, and so on, in China. To date, no data have been reported on the inhibitory effect of SHL and its constituents on rat lens aldose reductase (RLAR) and advanced glycation end products (AGEs). Therefore, the inhibitory effect of compounds isolated from SHL extract on RLAR and AGEs was investigated to evaluate potential treatments of diabetic complications. The ethyl acetate (EtOAC) fraction of SHL extract showed strong inhibitory activity on RLAR and AGEs; therefore, EtOAc fraction (3...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28317724/a-metabolomic-evaluation-of-the-phytochemical-composition-of-tomato-juices-being-used-in-human-clinical-trials
#8
Morgan J Cichon, Ken M Riedl, Steven J Schwartz
Juices from the traditional red tomato and a unique tangerine tomato variety are being investigated as health promoting foods in human clinical trials. However, it is unknown how the tangerine and red tomato juices differ in biologically relevant phytochemicals beyond carotenoids. Here liquid-chromatography high-resolution mass spectrometry metabolomics was used to evaluate broadly the similarities and differences in carotenoids and other phytochemicals between red and tangerine tomato juices intended for clinical interventions...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28317707/comparison-of-binding-interaction-between-%C3%AE-lactoglobulin-and-three-common-polyphenols-using-multi-spectroscopy-and-modeling-methods
#9
Jingjing Jia, Xin Gao, Minghao Hao, Lin Tang
Tea, coffee and fruit in dairy products are rich in polyphenols. The interaction mechanism between β-lactoglobulin (β-LG) and chlorogenic acid (CGA), ferulic acid (FA) and epigallocatechin-3-gallate (EGCG) was investigated. Fluorescence experiments proved that polyphenols quenched β-LG fluorescence strongly in static mode and EGCG had stronger binding affinity toward β-LG than CGA and FA. The main interaction force of EGCG binding with β-LG was different from CGA and FA. Furthermore, circular dichroism and fourier transform infrared data indicated that polyphenols changed β-LG secondary structure inducing a-helix to β-structures transition...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28306529/in-vitro-inhibition-of-phosphodiesterase-5-and-arginase-activities-from-rat-penile-tissue-by-two-nigerian-herbs-hunteria-umbellata-and-anogeissus-leiocarpus
#10
Ganiyu Oboh, Adeniyi Abiodun Adebayo, Ayokunle Olubode Ademosun, Aline August Boligon
BACKGROUND: Anogeissus leiocarpus and Hunteria umbellata have been reportedly used in traditional medicine for the management of erectile dysfunction (ED). However, the scientific basis for their use has not been well established. Therefore, this study was designed to investigate the inhibitory effects of water extractable phytochemicals of H. umbellata and A. leiocarpus on phosphodiesterase-5 (PDE-5) and arginase as well as pro-oxidants induced lipid peroxidation in rat penile tissue...
March 17, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/28303053/comparison-of-color-anti-nutritional-factors-minerals-phenolic-profile-and-protein-digestibility-between-hard-to-cook-and-easy-to-cook-grains-from-different-kidney-bean-phaseolus-vulgaris-accessions
#11
Naincy Parmar, Narpinder Singh, Amritpal Kaur, Sheetal Thakur
The present study was aimed to evaluate the differences among anti-nutritional factors in relation to mineral absorption and protein digestibility of Easy-to-cook (ETC) and Hard-to-cook (HTC) grains from different kidney bean (KB) accessions.HTC grains showed lower a* (redness to yellowness) and b* (greenness to blueness) values and L* value than ETC grains. HTC grains had significantly higher Ca and Zn and lower Cu, Mn and Fe than ETC grains. ETC and HTC grains showed significant variation in mineral, total phenolic content (TPC), tannin and phytic acid content...
March 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28301981/alterations-of-hepatocyte-function-with-free-radical-generators-and-reparation-or-prevention-with-coffee-polyphenols
#12
Amel Saidi Merzouk, Merzouk Hafida, Amel Medjdoub, Bouchra Loukidi, Sabri Cherrak, Sid Ahmed Merzouk, Mourad Elhabiri
Liver diseases are linked in the majority of cases to oxidative stress that antioxidants could neutralize with reducing liver injury. Chlorogenic acid, a coffee polyphenol, possesses antioxidant prosperities. The aim of this study was to evaluate in vitro preventive and corrective effects of cholorogenic acid in hepatocyte toxicity induced by free radicals. Hepatocytes were isolated from adult male Wistar rats. To determine corrective effects and reparation, cells were first exposed to two free radical generators (Hydrogen peroxide/Iron sulfate for hydroxyl radical formation, and Phenazine methosulfate/Nicotinamide adenine dinucleotide for superoxide anion formation) for 12H and thereafter treated by chlorogenic acid (1 and 10 µM final concentration) for another 12H...
March 16, 2017: Free Radical Research
https://www.readbyqxmd.com/read/28301955/bioactive-compounds-and-antioxidants-from-a-mediterranean-garland-harvested-at-two-stages-of-maturity
#13
Leonardo Sulas, Giacomo L Petretto, Giorgio Pintore, Giovanna Piluzza
Chrysanthemum coronarium L. (garland) is an herbaceous plant rich in bioactive compounds. The chemical composition, bioactive compounds and antioxidant properties of a Mediterranean garland population were investigated in different organs at two phenological stages. Antioxidant capacity varied from 7.9 (vegetative) to 14.4 (flowering) mmol Trolox equivalent antioxidant capacity 100 g(-1) dry weight (DW). A significant correlation between antioxidant capacity and total phenolics and total flavonoids was found at flowering stage...
March 17, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28299978/in-vitro-antibacterial-antifungal-and-antioxidant-activities-of-eucalyptus-spp-leaf-extracts-related-to-phenolic-composition
#14
Hosam O Elansary, Mohamed Z M Salem, Nader A Ashmawy, Kowiyou Yessoufou, Ahmed A A El-Settawy
The crude methanolic extracts from leaves of Eucalyptus camaldulensis L., E. camaldulensis var obtusa and E. gomphocephala grown in Egypt were investigated to explore their chemical composition as well as their antibacterial, antifungal and antioxidant activities. Major phenolics found were ellagic acid, quercetin 3-O-rhamnoside, quercetin 3-O-b-D-glucuronide, caffeic acid and chlorogenic acid. The antioxidant activities were examined by the 2,2'-diphenypicrylhydrazyl (DPPH) and β-Carotene-linoleic acid assays...
March 16, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28299905/variation-in-phenolic-profile-%C3%AE-carotene-and-flavonoid-contents-biological-activities-of-two-tagetes-species-from-pakistani-flora
#15
Muhammad Adnan Ayub, Abdullah Ijaz Hussain, Muhammad Asif Hanif, Shahzad Ali Shahid Chatha, Ghulam Mustafa Kamal, Muhammad Shahid, Omar Janneh
The objective of present study was to evaluate the variation in phenolic profile, β-carotene, flavonoid contents, antioxidant and antimicrobial properties of Tagetes eracta and Tagetes patula (T. erecta and T. patula) through different in vitro assays.,Antioxidant activity was determined through 2, 2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging and inhibition of linoleic acid peroxidation assays and antibacterial and antifungal activities studied using the disc diffusion and resazurin microtiter-plate assays against bacterial and fungal strains...
March 16, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28299441/the-r2r3myb-vvmybpa1-from-grape-reprograms-the-phenylpropanoid-pathway-in-tobacco-flowers
#16
Valentina Passeri, Stefan Martens, Elisabete Carvalho, Chantal Bianchet, Francesco Damiani, Francesco Paolocci
This work shows that, in tobacco, the ectopic expression of VvMYBPA1 , a grape regulator of proanthocyanidin biosynthesis, up- or down-regulates different branches of the phenylproanoid pathway, in a structure-specific fashion. Proanthocyanidins are flavonoids of paramount importance for animal and human diet. Research interest increasingly tilts towards generating crops enriched with these health-promoting compounds. Flavonoids synthesis is regulated by the MBW transcriptional complex, made of R2R3MYB, bHLH and WD40 proteins, with the MYB components liable for channeling the complex towards specific branches of the pathway...
March 15, 2017: Planta
https://www.readbyqxmd.com/read/28288826/evaluation-of-acute-and-subacute-toxicity-of-hydroethanolic-extract-of-dolichandra-unguis-cati-l-leaves-in-rats
#17
Juliana Calil Brondani, Fernanda Ziegler Reginato, Evelyne da Silva Brum, Marina de Souza Vencato, Cibele Lima Lhamas, Carine Viana Silva, Maria Izabel Ugalde Marques da Rocha, Liliane de Freitas Bauermann, Melânia Palermo Manfron
ETHNOPHARMACOLOGICAL RELEVANCE: Dolichandra unguis-cati L. is a native climbing plant of Brazil, popularly known as "unha de gato". It has been traditionally used mainly as an antipyretic, anti-inflammatory and anti-tumor agent, yet little toxicological information is found in the literature. AIM OF THE STUDY: To identify the chemical composition of the hydroethanolic extract obtained from the leaves of Dolichandra uniguis-cati and to evaluate the acute and subacute toxicity in male and female rats, in order to assess the safety profile of this plant...
March 10, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28287485/chemical-constituents-of-smilax-china-l-stems-and-their-inhibitory-activities-against-glycation-aldose-reductase-%C3%AE-glucosidase-and-lipase
#18
Hee Eun Lee, Jin Ah Kim, Wan Kyunn Whang
The search for natural inhibitors with anti-diabetes properties has gained increasing attention. Among four selected Smilacaceae family plants, Smilax china L. stems (SCS) showed significant in vitro anti-glycation and rat lens aldose reductase inhibitory activities. Bioactivity-guided isolation was performed with SCS and four solvent fractions were obtained, which in turn yielded 10 compounds, including one phenolic acid, three chlorogenic acids, four flavonoids, one stilbene, and one phenylpropanoid glycoside; their structures were elucidated using nuclear magnetic resonance and mass spectrometry...
March 11, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28284186/phytochemical-compositions-of-extract-from-peel-of-hawthorn-fruit-and-its-antioxidant-capacity-cell-growth-inhibition-and-acetylcholinesterase-inhibitory-activity
#19
Panpan Wu, Fajie Li, Jianyong Zhang, Bin Yang, Zhaojie Ji, Weidong Chen
BACKGROUND: Hawthorn fruit (HF) is a well-known traditional medicine in China with the effects of improving digestion and regulating qi-flowing for removing blood stasis. Modern pharmacological experiments showed that HF extract has various pharmaceutical properties and flavonoids are considered as the main bioactive compounds. In this paper, Diaion HP-20 adsorption chromatography was used to enrich flavonoids in PHF, and the phytochemical composition of EPHF was analyzed by high performance liquid chromatography (HPLC) and liquid chromatography tandem mass spectrometry (LC-MS)...
March 11, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28277162/modulation-of-chemotherapy-induced-cytotoxicity-in-sh-sy5y-neuroblastoma-cells-by-caffeine-and-chlorogenic-acid
#20
Susan Hall, Shailendra Anoopkumar-Dukie, Gary D Grant, Ben Desbrow, Richard Lai, Devinder Arora, Yinna Hong
Chemotherapy is an important treatment modality for malignancy but is limited by significant toxicity and it susceptibility to numerous drug interactions. While the interacting effects with medications are well known, there is limited evidence on the interaction with commonly consumed food and natural products. The aim of this study was to evaluate the bioactive constituents of coffee (caffeine and chlorogenic acid) on the cytotoxicity of doxorubicin, gemcitabine, and paclitaxel in vitro. Pretreatment with caffeine (100 nM and 10 μM) sensitized SH-SY5Y cells to doxorubicin-induced toxicity and increased apoptosis and sensitized PC3 cells to gemcitabine-induced toxicity...
March 6, 2017: Toxicology Mechanisms and Methods
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