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https://www.readbyqxmd.com/read/28105189/chrysin-induces-cell-apoptosis-in-human-uveal-melanoma-cells-via-intrinsic-apoptosis
#1
Chunyan Xue, Yueqin Chen, Dan-Ning Hu, Codrin Iacob, Chengwei Lu, Zhenping Huang
Uveal melanoma is the most common intraocular malignant tumor in adults. Chrysin is a flavonoid present in honey, propolis, various plants and herbs. In the present study, the cytotoxic effects of chrysin were investigated on human uveal melanoma cell lines (M17 and SP6.5) and associated signaling pathways, and a comparison to the effects on normal ocular cells [scleral fibroblasts and retinal pigment epithelial (RPE) cells] was performed. The effects of chrysin on cell viability were assessed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28081349/chrysin-prevents-brain-damage-caused-by-global-cerebralischemia-reperfusion-in-a-c57bl-j6-mouse-model
#2
Mehmet Akif Durak, Mustafa Namık Öztanır, Neşe Başak Türkmen, Osman Çiftçi, Aslı Taşlıdere, Mehmet Tecellioğlu, Arif Önder
BACKGROUND/AIM: The present study investigated the neuroprotective effects of chrysin (CRS) following global cerebral ischemia and reperfusion (I/R) in a C57BL/J6 mouse model. MATERIALS AND METHODS: A total of 40 mice were equally divided into four groups: (1) sham-operated (SH = control), (2) global cerebral I/R (I/R), (3) CRS, and (4) CRS + I/R. In the I/R group, the bilateral carotid arteries were clipped for 15 min and the mice were treated with vehicle (corn oil) for 10 days...
December 20, 2016: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28067837/kaempferol-and-chrysin-synergies-to-improve-septic-mice-survival
#3
Omar A Harasstani, Chau Ling Tham, Daud A Israf
Previously, we reported the role of synergy between two flavonoids-namely, chrysin and kaempferol-in inhibiting the secretion of a few major proinflammatory mediators such as tumor necrosis factor-alpha (TNF-α), prostaglandin E₂ (PGE₂), and nitric oxide (NO) from lipopolysaccharide (LPS)-induced RAW 264.7 cells. The present study aims to evaluate the effects of this combination on a murine model of polymicrobial sepsis induced by cecal ligation and puncture (CLP). Severe sepsis was induced in male ICR mice (n = 7) via the CLP procedure...
January 6, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28056420/synergistic-effects-of-acarbose-and-an-oroxylum-indicum-seed-extract-in-streptozotocin-and-high-fat-diet-induced-prediabetic-mice
#4
Wenlong Sun, Yuanbin Sang, Bowei Zhang, Xiaoxia Yu, Qinmin Xu, Zhilong Xiu, Yuesheng Dong
Prediabetes is defined as blood glucose levels above normal but below diabetes thresholds, and up to 70% of individuals with prediabetes will eventually develop diabetes if left untreated. Acarbose, the first FDA approved anti-prediabetes agent, has some disadvantages, such as reducing the risk of diabetes by only 36%, side effects and limited effects on complications. The aim of this study is to develop a new agent to treat prediabetes and to investigate the anti-prediabetes effects and mechanisms of acarbose and an Oroxylum indicum seed extract (OISE) in prediabetic mice...
January 2, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28047565/su-g-tep3-10-radiation-induces-prompt-live-cell-metabolic-fluxes
#5
D Campos, W Peeters, K Nickel, B Burkel, J Bussink, R Kimple, A van der Kogel, K Eliceiri, M Kissick
PURPOSE: To compare metabolic dynamics and HIF-1α expression following radiation between a cancerous cell line (UM-SCC-22B) and a normal, immortalized cell line, NOK (Normal Oral Keratinocyte). HIF-1 is a key factor in metabolism and radiosensitivity. A better understanding of how radiation affects the interplay of metabolism and HIF-1 might give a better understanding of the mechanisms responsible for radiosensitivity. METHODS: Changes in cellular metabolism in response to radiation are tracked by fluorescence lifetime of NADH...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/27996361/insight-into-the-molecular-mechanism-of-p-glycoprotein-mediated-drug-toxicity-induced-by-bioflavonoids-an-integrated-computational-approach
#6
Pathomwat Wongrattanakamon, Vannajan Sanghiran Lee, Piyarat Nimmanpipug, Sunee Chansakaow, Supat Jiranusornkul
In this work, molecular docking, pharmacophore modelling, and molecular dynamics (MD) simulation were rendered for the mouse P-gp (code: 4Q9H) and bioflavonoids; amorphigenin, chrysin, epigallocatechin, formononetin, and rotenone including a positive control; verapamil to identify protein-ligand interaction features including binding affinities, interaction characteristics, hot-spot amino acid residues, and complex stabilities. These flavonoids occupied the same binding site with high binding affinities and shared the same key residues for their binding interactions and the binding region of the flavonoids was revealed that overlapped the ATP binding region with hydrophobic and hydrophilic interactions suggesting a competitive inhibition mechanism of the compounds...
December 20, 2016: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/27983856/sodium-oleate-based-nanoemulsion-enhances-oral-absorption-of-chrysin-through-inhibition-of-ugt-mediated-metabolism
#7
Dong Dong, Enxi Quan, Xue Yuan, Qian Xie, Zhijie Li, Baojian Wu
Oral bioavailability of flavonoids (and many phenolic drugs) is severely limited by extensive first-pass glucuronidation. Here we aimed to determine the modulatory effects of commonly used pharmaceutical excipients (PEs) on UDP-glucuronosyltransferase (UGT) activities and to evaluate the potential of nanoemulsions containing a UGT-inhibitory PE for oral absorption enhancement of chrysin, a model flavonoid. The effects of PEs on glucuronidation were determined using tissue (liver and intestine) microsomes, expressed UGT1A1 enzyme, and UGT1A1-overexpressing HeLa cells...
December 16, 2016: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/27975946/hplc-quantification-method-for-chrysin-and-tectochrysin-in-flourensia-extracts
#8
M Ángeles Ramírez-Cisneros, R Ríos Gómez, M Y Rios
No abstract text is available yet for this article.
December 2016: Planta Medica
https://www.readbyqxmd.com/read/27951449/plant-flavonoids-in-cancer-chemoprevention-role-in-genome-stability
#9
REVIEW
Vazhappilly Cijo George, Graham Dellaire, H P Vasantha Rupasinghe
Carcinogenesis is a multistage process that involves a series of events comprising of genetic and epigenetic changes leading to the initiation, promotion and progression of cancer. Chemoprevention is referred to as the use of nontoxic natural compounds, synthetic chemicals or their combinations to intervene in multistage carcinogenesis. Chemoprevention through diet modification, i.e., increased consumption of plant-based food, has emerged as a most promising and potentially cost-effective approach to reducing the risk of cancer...
November 28, 2016: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/27925249/inhibition-of-glucuronidation-and-oxidative-metabolism-of-buprenorphine-using-gras-compounds-or-dietary-constituents-supplements-in-vitro-proof-of-concept
#10
Neha V Maharao, Anand A Joshi, Phillip M Gerk
The present study investigated the potential of generally recognized as safe compounds or dietary substances to inhibit the presystemic metabolism of buprenorphine and increase its oral bioavailability. Using IVIVE, the buprenorphine extraction ratios in intestine and liver were predicted as 96% and 71%, respectively. In addition, the relative fraction of buprenorphine metabolized by oxidation and glucuronidation in these two organs was estimated using pooled human intestinal and liver microsomes. In both organs, oxidation appeared to be the major metabolic pathway with a six and four fold higher intrinsic clearance than glucuronidation in intestine and liver, respectively...
December 7, 2016: Biopharmaceutics & Drug Disposition
https://www.readbyqxmd.com/read/27918469/dietary-compound-chrysin-inhibits-retinal-neovascularization-with-abnormal-capillaries-in-db-db-mice
#11
Min-Kyung Kang, Sin-Hye Park, Yun-Ho Kim, Eun-Jung Lee, Lucia Dwi Antika, Dong Yeon Kim, Yean-Jung Choi, Young-Hee Kang
Diabetic retinopathy (DR) develops in a significant proportion of patients with chronic diabetes, characterized by retinal macular edema and abnormal retinal vessel outgrowth leading to vision loss. Chrysin, a naturally-occurring flavonoid found in herb and honeycomb, has anti-inflammatory, antioxidant, and anti-cancer properties. This study sought to determine the protective effects of chrysin on retinal neovascularization with abnormal vessels and blood-retinal barrier (BRB) breakdown in 33 mM glucose-exposed human retinal endothelial cells and in db/db mouse eyes...
December 3, 2016: Nutrients
https://www.readbyqxmd.com/read/27894779/chrysin-cocrystals-characterization-and-evaluation
#12
Renu Chadha, Yashika Bhalla, Avdesh Nandan, Kunal Chadha, Maninder Karan
Solvent free mechanochemical approach is utilized to synthesise new cocrystals of chrysin using supramolecular chemistry based upon reliable synthons. Chrysin, a flavone nutraceutical with wide range of beneficial effects has critically low bioavailability on account of its poor aqueous solubility and consequently poor absorption from the gastrointestinal tract. The present study focuses on this critical aspect and has exploited non covalent interactions to prepare its cocrystals with cytosine and thiamine hydrochloride...
February 5, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/27878922/a-nodd-like-protein-activates-transcription-of-genes-involved-with-naringenin-degradation-in-a-flavonoid-dependent-manner-in-herbaspirillum-seropedicae
#13
R Wassem, A M Marin, A Daddaoua, R A Monteiro, L S Chubatsu, J L Ramos, W J Deakin, W J Broughton, F O Pedrosa, E M Souza
Herbaspirillum seropedicae is an associative, endophytic non-nodulating diazotrophic bacterium that colonises several grasses. An ORF encoding a LysR-type transcriptional regulator, very similar to NodD proteins of rhizobia, was identified in its genome. This nodD-like gene, named fdeR, is divergently transcribed from an operon encoding enzymes involved in flavonoid degradation (fde operon). Apigenin, chrysin, luteolin and naringenin strongly induce transcription of the fde operon, but not that of the fdeR, in an FdeR-dependent manner...
November 23, 2016: Environmental Microbiology
https://www.readbyqxmd.com/read/27860280/design-synthesis-and-biological-evaluation-of-chrysin-derivatives-as-potential-fabh-inhibitors
#14
Hong-Xia Li, Zhong-Chang Wang, Yu-Mei Qian, Xiao-Qiang Yan, Ya-Dong Lu, Hai-Liang Zhu
New series of chrysin derivatives (4a-4t) were designed and synthesized by introducing different substituted piperazines at C-7 position. Their inhibitory effects on FabH were evaluated using two Gram-negative bacterial strains, Escherichia coli and Pseudomonas aeruginosa, and two Gram-positive bacterial strains, Bacillus subtilis and Staphylococcus aureus. To our delight, most of these compounds exhibited a dramatic increase in inhibitory potency, compared with the control positive drugs. Among them, compound 4s exhibited the most potent inhibitory activity with IC50 values of 5...
January 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/27847208/synthesis-and-characterization-of-chrysin-loaded-pcl-peg-pcl-nanoparticle-and-its-effect-on-breast-cancer-cell-line
#15
Ali Eatemadi, Hadis Daraee, Hammed T Aiyelabegan, Babak Negahdari, Bahram Rajeian, Nosratollah Zarghami
BACKGROUND: Nano-therapy exhibit the potential of revolutionizing cancer therapy. This field introduces nanovectors/nanocarriers for anticancer drugs targeted delivery, and also finds application in imaging. Chrysin, a natural flavonoid, was recently studied as having important biological roles in chemical defenses, nitrogen fixation, anti-inflammatory, and anti-oxidant properties. We aim at studying the effect of nano-chrysin on breast cancer cell line. METHODS: The effect of chrysin loaded PCL-PEG-PCL was studied on T47D breast cancer cell line...
December 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27833438/the-inhibitory-effect-of-flavonoids-on-interleukin-8-release-by-human-gastric-adenocarcinoma-ags-cells-infected-with-cag-pai-helicobacter-pylori
#16
Mariusz A Skiba, Kornelia Szendzielorz, Bogdan Mazur, Wojciech Król
INTRODUCTION: It is well known that the presence of Helicobacter pylori in the stomach induces gastritis and causes an immune response. Exposure of gastric epithelial cell lines to this germ induces the secretion of interleukin-8 (IL-8), which is a potent PMN-activating chemotactic cytokine. Interleukin-8 is usually elevated in gastric biopsy samples of patients with H. pylori-associated gastritis and significantly increases in the supernatant of in vitro cultivated biopsy samples of gastric mucosa with active H...
2016: Central-European Journal of Immunology
https://www.readbyqxmd.com/read/27829351/recent-updates-in-imperative-natural-compounds-for-healthy-brain-and-nerve-function-a-systematic-review-of-implications-for-multiple-sclerosis
#17
Nima Sanadgol, Shahram Shahraki Zahedani, Mohammad Sharifzadeh, Roghayeh Khalseh, Gullam Reza Barbari, Mohammad Abdollahi
BACKGROUND: The evolution of the 'Green' movement in western society has changed attitudes in the general population who now perceive natural compounds as being inherently harmless and more desirable than artificial chemical products. OBJECTIVE: Considering the growing interest towards introducing naturally emerged medicines, the purpose of this review was to overview the ongoing research into prevention and treatment of multiple sclerosis (MS) lesions. METHOD: This review was carried out by searching bibliographic databases such as PubMed and Scopus for studies reported between 1th January 2008 to 30rd January 2016 on MS patients or animal models of MS, investigating the beneficial effects of natural compounds in MS treatment...
November 8, 2016: Current Drug Targets
https://www.readbyqxmd.com/read/27818124/chrysin-promotes-attenuation-of-depressive-like-behavior-and-hippocampal-dysfunction-resulting-from-olfactory-bulbectomy-in-mice
#18
Carlos Borges Filho, Cristiano Ricardo Jesse, Franciele Donato, Lucian Del Fabbro, Marcelo Gomes de Gomes, André Tiago Rossito Goes, Leandro Cattelan Souza, Silvana Peterini Boeira
Chrysin is a natural flavonoid which is found in bee propolis, honey and various plants, and antidepressant-like effect of chrysin in chronically stressed mice was previously demonstrated by our group. In this work, we investigated the action of chrysin treatment (5 or 20 mg/kg) for 14 days in the depressant-like behavior and in the hippocampal dysfunction induced by olfactory bulbectomy (OB), an animal model of agitated depression. Results demonstrated that OB occasioned a depressant-like behavior in the splash test, open field test and forced swimming test...
December 25, 2016: Chemico-biological Interactions
https://www.readbyqxmd.com/read/27788592/two-new-prenylated-flavonoids-from-the-roots-of-berberis-thunbergii-dc
#19
Nusrat Hussain, Achyut Adhikari, Malik Shoaib Ahmad, Atia-Tul- Wahab, Meher Ali, M Iqbal Choudhary
Two new prenylated flavonoids, thunbergiols A (1) and B (2), along with three known compounds, chrysin (3), quercetin (4) and berberine (5) were obtained from the methanolic extract of roots of Berberis thunbergii DC. MS, NMR and other spectroscopic techniques were employed for their structural characterisation.
April 2017: Natural Product Research
https://www.readbyqxmd.com/read/27770720/inhibitory-effects-of-flavonoids-extracted-from-nepalese-propolis-on-the-lps-signaling-pathway
#20
Megumi Funakoshi-Tago, Kentaro Ohsawa, Toshiyuki Ishikawa, Fumika Nakamura, Fumihito Ueda, Yuji Narukawa, Fumiyuki Kiuchi, Hiroomi Tamura, Kenji Tago, Tadashi Kasahara
Flavonoids, particularly those derived from plants, harbor biological effects such as anti-inflammation and the inhibition of cancer progression. In the present study, we investigated the effects of 10 kinds of flavonoids isolated from Nepalese propolis on the LPS signaling pathway in order to clarify their anti-inflammatory activities. Five types of flavonoids: isoliquiritigenin, chrysin, 3',4'-dihydroxy-4-methoxydalbergione, 4-methoxydalbergion, and cearoin, markedly inhibited inflammatory responses including LPS-induced NO production by suppressing the expression of iNOS mRNA and LPS-induced mRNA expression of TNFα and CCL2...
November 2016: International Immunopharmacology
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