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https://www.readbyqxmd.com/read/29334625/light-quality-affects-flavonoid-production-and-related-gene-expression-in-cyclocarya-paliurus
#1
Yang Liu, Shengzuo Fang, Wanxia Yang, Xulan Shang, Xiangxiang Fu
Understanding the responses of plant growth and secondary metabolites to differential light conditions is very important to optimize cultivation conditions of medicinal woody plants. As a highly valued and multiple function tree species, Cyclocarya paliurus is planted and managed for timber production and medical use. In this study, LED-based light including white light (WL), blue light (BL), red light (RL), and green light (GL) were used to affect leaf biomass production, flavonoid accumulation and related gene expression of one-year C...
January 11, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29333385/kaempferol-inhibits-angiogenesis-by-suppressing-hif-1%C3%AE-and-vegfr2-activation-via-erk-p38-mapk-and-pi3k-akt-mtor-signaling-pathways-in-endothelial-cells
#2
Gi Dae Kim
Kaempferol has been shown to inhibit vascular formation in endothelial cells. However, the underlying mechanisms are not fully understood. In the present study, we evaluated whether kaempferol exerts antiangiogenic effects by targeting extracellular signal-regulated kinase (ERK)/p38 mitogen-activated protein kinase (MAPK) and phosphoinositide 3-kinase (PI3K)/Akt/mechanistic target of rapamycin (mTOR) signaling pathways in endothelial cells. Endothelial cells were treated with various concentrations of kaempferol for 24 h...
December 2017: Preventive Nutrition and Food Science
https://www.readbyqxmd.com/read/29332828/uplc-ms-ms-analysis-for-antioxidant-components-of-lycii-fructus-based-on-spectrum-effect-relationship
#3
Xian-Fei Zhang, Juan Chen, Jun-Li Yang, Yan-Ping Shi
Lycii Fructus is widely cultivated in the Northwest China. It is well-known for its antiaging effect in traditional Chinese medicines (TCMs), but the effective components are not clear. In this work, the ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) was used to study the antioxidant components of Lycii Fructus through analyzing the spectrum-effect relationship, and the positive correlation components with antioxidant activity were partially identified. The extractums of Lycii Fructus were adsorbed with macroporous resin, and then eluted with water and 30%, 60%, 90% ethanol in turn...
April 1, 2018: Talanta
https://www.readbyqxmd.com/read/29331686/quercetin-decrease-somatic-cells-count-in-mastitis-of-dairy-cows
#4
Artur Burmańczuk, Piotr Hola, Andrzej Milczak, Tomasz Piech, Cezary Kowalski, Beata Wojciechowska, Tomasz Grabowski
Quercetin is a dietary flavonoid which has an effect on inflammation, angiogenesis and vascular inflammation. In several other flavonoids (e.g. kaempferol, astragalin, alpinetin, baicalein, indirubin), anti-inflammatory mechanism was proven by using mice mastitis model. The aim of the current study was pilot analysis of quercetin tolerability and its impact on somatic cells count (SCC) after multiple intramammary treatment on dairy cows with clinical mastitis. Based on SCC and clinical investigation, 9 dairy cows with clinical mastitis of one quarter were selected for the pilot study...
January 9, 2018: Research in Veterinary Science
https://www.readbyqxmd.com/read/29331369/equisetum-telmateia-extracts-chemical-compositions-antioxidant-activity-and-antimicrobial-effect-on-the-growth-of-some-pathogenic-strain-causing-poisoning-and-infection
#5
Marzie Yeganegi, Farideh Tabatabaei Yazdi, Seyed Ali Mortazavi, Javad Asili, Behrooz Alizadeh Behbahani, Adel Beig Babaei
The aerial parts of Equisetum telmateia have been used as a source of biologically active compounds to treat inflammatory, diarrhea, stomach-ache, eczema and mouth infections in traditional medicine. The aim of this work is to evaluate the extraction yield, chemical compositions, antioxidant activity and antimicrobial activity of E. telmateia extracts on Staphylococcus aureus, Bacillus cereus, Escherichia coli, Salmonella typhi and Candida albicans. Chemical compositions E. telmateia was analyzed by high performance liquid chromatography (HPLC) using a C18 column...
January 10, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29329862/active-compounds-antioxidant-activity-and-%C3%AE-glucosidase-inhibitory-activity-of-different-varieties-of-chaenomeles-fruits
#6
Jing Miao, Xia Li, Chengcheng Zhao, Xiaoxiao Gao, Ying Wang, Wenyuan Gao
Chaenomeles is an important source for food industry in China, and its planting area is expanding year by year. This study was conducted to evaluate different varieties of Chaenomeles by comparing the chemical compositions, antioxidant activity and α-glucosidase inhibitory activity of peels and fleshes from twelve varieties of Chaenomeles. In the results, peels of Chaenomeles contain more phenolics, flavonoids and triterpenes, and show better antioxidant activity and α-glucosidase inhibitory activity than their fleshes...
May 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29328946/kaempferol-alleviates-lps-induced-neuroinflammation-and-bbb-dysfunction-in-mice-via-inhibiting-hmgb1-release-and-down-regulating-tlr4-myd88-pathway
#7
Xiao Cheng, Ying-Lin Yang, Huan Yang, Yue-Hua Wang, Guan-Hua Du
Kaempferol is a natural flavonoid with many biological activities including anti-oxidation and anti-inflammation. Nevertheless, its anti-neuroinflammation role and the relevant mechanism remain unclear. The present study was to investigate effects of kaempferol against LPS-induced neuroinflammation and blood-brain barrier dysfunction as well as the mechanism in mice. BALB/c mice were treated with LPS 5mg/kg to induce inflammation after pre-treatment with kaempferol 25, 50, or 100mg/kg for 7days. The results showed that kaempferol reduced the production of various pro-inflammatory factors and inflammatory proteins including IL-1β, IL-6, TNF-α, MCP-1, COX-2 and iNOS in brain tissues...
January 9, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29317030/combination-of-chemical-fingerprinting-with-bioassay-a-preferable-approach-for-quality-control-of-safflower-injection
#8
Wu W Feng, Yi Zhang, Jin F Tang, Cong E Zhang, Qin Dong, Rui Y Li, Xiao H Xiao, Cheng Peng, Xiao P Dong, Dan Yan
Safflower Injection is one kind of injections derived from traditional Chinese medicine. It is widely applied to treat cerebrovascular diseases such as acute cerebral infarction, stroke, coronary heart disease, and angiitis. However, most adverse reactions of Safflower Injection in clinic are caused by its quality problems. In this study, 10 batches of normal and 42 batches of abnormal Safflower Injections were obtained from the clinical practice. Their quality fluctuations were detected by chemical fingerprinting (CF, ultra-performance liquid chromatography tandem mass spectrometry) and bioassays including cell-based biological profile (CBP) assay and enzymatic assay...
March 20, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29310425/treatment-with-phytoestrogens-reversed-triclosan-and-bisphenol-a-induced-anti-apoptosis-in-breast-cancer-cells
#9
Geum-A Lee, Kyung-Chul Choi, Kyung-A Hwang
Triclosan (TCS) and bisphenol A (BPA) are endocrine-disrupting chemicals that interfere with the hormone or endocrine system and may cause cancer. Kaempferol (Kaem) and 3,3'-diindolylmethane (DIM) are phytoestrogens that play chemopreventive roles in the inhibition of carcinogenesis and cancer progression. In this study, the influence of TCS, BPA, Kaem, and DIM on proliferation and apoptotic abilities of VM7Luc4E2 breast cancer cells were examined. MTT assay revealed that TCS (0.1-10 μM), BPA (0.1-10 μM) and E2 (0...
January 9, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29301320/the-effects-of-kaempferol-inhibited-autophagy-on-osteoclast-formation
#10
Chang-Ju Kim, Sang-Hun Shin, Bok-Joo Kim, Chul-Hoon Kim, Jung-Han Kim, Hae-Mi Kang, Bong-Soo Park, In-Ryoung Kim
Kaempferol, a flavonoid compound, is derived from the rhizome of Kaempferia galanga L., which is used in traditional medicine in Asia. Autophagy has pleiotropic functions that are involved in cell growth, survival, nutrient supply under starvation, defense against pathogens, and antigen presentation. There are many studies dealing with the inhibitory effects of natural flavonoids in bone resorption. However, no studies have explained the relationship between the autophagic and inhibitory processes of osteoclastogenesis by natural flavonoids...
January 2, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29301239/characterization-of-vasorelaxant-principles-from-the-needles-of-pinus-morrisonicola-hayata
#11
Guan-Heng Chen, Yue-Chiun Li, Nan-Hei Lin, Ping-Chung Kuo, Jason T C Tzen
Pinus morrisonicola Hayata, usually called Taiwan five-leaf pine (5LP), is an endemic species in Taiwan and is traditionally used to relieve hypertension symptoms and improve cardiovascular function. In this study, the needle extract of 5LP was fractionated and analyzed by LC/MS/MS to search for possible antihypertensive candidates. In addition, bioassay-guided purification of the bioactive components was performed by Ca2+ fluorescent signal (Fluo 4-AM) assays. Two dihydrobenzofuran lignans, pinumorrisonide A (1) and icariside E4 (2), and one acylated flavonoid glycoside, kaempferol 3-O-α-(6‴-p-coumaroylglucosyl-β-1,4-rhamnoside) (3) were characterized from the active fractions...
December 31, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29290397/antibacterial-potential-of-the-cistus-incanus-l-phenolics-as-studied-with-use-of-thin-layer-chromatography-combined-with-direct-bioautography-and-in-situ-hydrolysis
#12
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
https://www.readbyqxmd.com/read/29285095/kaempferol-targets-estrogen-related-receptor-%C3%AE-and-suppresses-the-angiogenesis-of-human-retinal-endothelial-cells-under-high-glucose-conditions
#13
Yan Wu, Qinmei Zhang, Rui Zhang
Diabetic retinopathy (DR) is the most common complication of diabetes and a major cause of new-onset blindness in the developed world. The present study aimed to examine the effect of kaempferol on high glucose-induced human retinal endothelial cells (HRECs) in vitro. The expression levels of various mRNAs and proteins were measured by reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and western blotting, respectively. The target of kaempferol was determined using a luciferase reporter assay...
December 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29278459/antiviral-activity-of-faramea-hyacinthina-and-faramea-truncata-leaves-on-dengue-virus-type-2-and-their-major-compounds
#14
Rodolfo S Barboza, Ligia M M Valente, Thiago Wolff, Iranaia Assunção-Miranda, Rômulo S L Neris, Iris P Guimarães-Andrade, Mário Gomes
The defatted fractions of the Faramea hyacinthina and F. truncata (Rubiaceae) leaf MeOH extracts showed in vitro non-cytotoxic and anti-dengue virus serotype 2 (DENV2) activity in human hepatocarcinoma cell lineage (HepG2). Submitting these fractions to the developed RP-SPE method allowed isolating the antiviral flavanone (2S)-isosakuranetin-7-O-β-D-apiofuranosyl(1→6)-β-D-glucopyranoside (1) from both species and yielded less active sub-fractions. The new diasteroisomeric epimer pair 2S + 2R of 5,3',5'-trihydroxy-flavanone-7-O-β-D-apiofuranosyl(1→6)-β-D-glucopyranoside (2a/2b) from F...
December 26, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29277227/phenolic-antioxidants-of-foxtail-and-little-millet-cultivars-and-their-inhibitory-effects-on-%C3%AE-amylase-and-%C3%AE-glucosidase-activities
#15
P M Pradeep, Yadahally N Sreerama
Evaluation of phenolic contents and their in vitro bioactivities of six diverse cultivars of foxtail and little millets revealed that their total phenolic content ranged from 19.42 to 24.12 µmol ferulic acid equivalents/g. The soluble fraction accounted for more than 80% of the total phenolic and flavonoid contents. Ferulic, caffeic and sinapic acids were the predominant phenolic acids, and luteolin and kaempferol were major flavonoids in the soluble fractions of millets. However, ferulic and p-coumaric acids were abundant in the bound fractions...
May 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29260412/inner-morphological-and-chemical-differentiation-of-boehmeria-species
#16
Kazi-Marjahan Akter, Hye-Jin Kim, Atif Ali Khan Khalil, Woo Sung Park, Mi Kyeong Lee, Jong Hee Park, Mi-Jeong Ahn
The present study was designed to establish quality control parameters for pharmacognostic evaluation and differentiation of eight locally derived Boehmeria species, B. gracilis, B. nivea, B. pannosa, B. platanifolia, B. quelpaertensis, B. spicata, B. splitgerbera, B. tricuspis, and two varieties named B. japonica var. longispica, B. nivea var. concolor, which have been utilized as the folk medicine, 'Mo-Si-Pool' in Korea. Although the outer morphological study of these species had been reported, there is no pharmacognostical description yet...
December 19, 2017: Journal of Natural Medicines
https://www.readbyqxmd.com/read/29258345/characterisation-of-an-extract-and-fractions-of-azadirachta-indica-flower-on-cholesterol-lowering-property-and-intestinal-motility
#17
Acharaporn Duangjai, Nitra Nuengchamnong, Learn-Han Lee, Bey-Hing Goh, Surasak Saokaew, Nungruthai Suphrom
Azadirachta indica has long been used in traditional medicine. This study focused on isolation and characterisation of active ingredients in the extract, its fractions (NF-EA, NF-AQ, NF-G) and its effect on the cholesterol absorption activity. The NF-EA fraction was identified by marker compounds by LC-ESI-QTOF/MS. Cholesterol absorption activity was performed by measuring the solubility and size of cholesterol micelles. The intestinal motility was also examined by isolated rat's ileum to test the contraction...
December 19, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29244711/flavonoids-and-ellagitannins-characterization-antioxidant-and-cytotoxic-activities-of-phyllanthus-acuminatus-vahl
#18
Mirtha Navarro, Ileana Moreira, Elizabeth Arnaez, Silvia Quesada, Gabriela Azofeifa, Felipe Vargas, Diego Alvarado, Pei Chen
The phenolic composition of leaves from Phyllanthus acuminatus L., a plant commonly used in Costa Rica as traditional medicine, was studied using UPLC-ESI-MS on an enriched phenolic extract. A total of 20 phenolic compounds were identified, comprising eight flavonoids (two flavanones-pinocembrin isomers and six derivatives from apigenin, chrysin, quercetin, and kaempferol); seven ellagitannins, two flavan-3-ols (prodelphinidin B dimer and (epi)gallocatechin); and three phenolic acids (ellagic acid, trimethylellagic acid, and ferulic acid)...
December 15, 2017: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/29242038/nmr-based-phytochemical-analysis-of-vitis-vinifera-cv-falanghina-leaves-characterization-of-a-previously-undescribed-biflavonoid-with-antiproliferative-activity
#19
Luciana Tartaglione, Angelita Gambuti, Paola De Cicco, Giuseppe Ercolano, Angela Ianaro, Orazio Taglialatela-Scafati, Luigi Moio, Martino Forino
Vitis vinifera cv Falanghina is an ancient grape variety of Southern Italy. A thorough phytochemical analysis of the Falanghina leaves was conducted to investigate its specialised metabolite content. Along with already known molecules, such as caftaric acid, quercetin-3-O-β-d-glucopyranoside, quercetin-3-O-β-d-glucuronide, kaempferol-3-O-β-d-glucopyranoside and kaempferol-3-O-β-d-glucuronide, a previously undescribed biflavonoid was identified. For this last compound, a moderate bioactivity against metastatic melanoma cells proliferation was discovered...
December 11, 2017: Fitoterapia
https://www.readbyqxmd.com/read/29236499/mutual-interaction-of-phenolic-compounds-and-microbiota-metabolism-of-complex-phenolic-apigenin-c-and-kaempferol-o-derivatives-by-human-fecal-samples
#20
Maren Vollmer, Selma Esders, Freda M Farquharson, Susanne Neugart, Sylvia Duncan, Monika Schreiner, Petra Louis, Ronald Maul, Sascha Rohn
Human colonic bacteria have an important impact on the biotransformation of flavonoid glycosides and their conversion can result in the formation of bioactive compounds. However, information about the microbial conversion of complex glycosylated flavonoids and the impact on the gut microbiota are still limited. In this study, the ability of different donors' human intestinal microbiota to convert selected flavonoid O- and C-glycosides was evaluated by performing in vitro fermentations. The results show that all flavonoid glycosides were metabolized via their aglycones yielding smaller substances...
December 13, 2017: Journal of Agricultural and Food Chemistry
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