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https://www.readbyqxmd.com/read/28089731/investigation-of-polymorphisms-in-genes-involved-in-estrogen-metabolism-in-menstrual-migraine
#1
Heidi G Sutherland, Morgane Champion, Amelie Plays, Shani Stuart, Larisa M Haupt, Alison Frith, E Anne MacGregor, Lyn R Griffiths
Migraine is a common, disabling headache disorder, which is influenced by multiple genes and environmental triggers. After puberty, the prevalence of migraine in women is three times higher than in men and >50% of females suffering from migraine report a menstrual association, suggesting hormonal fluctuations can influence the risk of migraine attacks. It has been hypothesized that the drop in estrogen during menses is an important trigger for menstrual migraine. Catechol-O-methyltransferase (COMT) and Cytochrome P450 (CYP) enzymes are involved in estrogen synthesis and metabolism...
January 13, 2017: Gene
https://www.readbyqxmd.com/read/28088578/the-effect-of-long-term-hindlimb-unloading-on-the-expression-of-risk-neurogenes-encoding-elements-of-serotonin-dopaminergic-systems-and-apoptosis-comparison-with-the-effect-of-actual-spaceflight-on-mouse-brain
#2
E A Kulikova, V A Kulikov, N A Sinyakova, A V Kulikov, N K Popova
The study of spaceflight effects on the brain is technically complex concern; complicated by the problem of applying an adequate ground model. The most-widely used experimental model to study the effect of microgravity is the tail-suspension hindlimb unloading model; however, its compliance with the effect of actual spaceflight on the brain is still unclear. We evaluated the effect of one month hindlimb unloading on the expression of genes related to the brain neuroplasticity - brain neutotrophic factors (Gdnf, Cdnf), apoptotic factors (Bcl-xl, Bax), serotonin- and dopaminergic systems (5-HT2A, Maoa, Maob, Th, D1r, Comt), and compared the results with the data obtained on mice that spent one month in spaceflight on Russian biosatellite Bion-M1...
January 11, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28074437/aberrant-endometrial-dna-methylome-of-homeobox-a10-and-catechol-o-methyltransferase-in-endometriosis
#3
Fei Ji, Xinhua Yang, Yan He, Hui Wang, Aixingzi Aili, Yan Ding
PURPOSE: Differential methylation of both HOXA10 and catechol-O-methyltransferase (COMT) has been reported in different endometrium disorders, and the two genes are linked through the estrogen pathway. The current study investigates the DNA methylation of HOXA10 and COMT in ectopic and eutopic endometrial tissues and its correlation with and the occurrence of endometriosis in women from Xinjiang province in China. METHODS: In the current study, 120 patients with endometriosis were recruited from our hospital between January 2011 and June 2014...
January 10, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28071803/effects-of-catechol-o-methyl-transferase-inhibition-on-anti-inflammatory-activity-of-luteolin-metabolites
#4
Sang Keun Ha, Jin-Ah Lee, Eun Jung Cho, Inwook Choi
Although luteolin is known to have potent anti-inflammatory activities, much less information has been provided on such activities of its hepatic metabolites. Luteolin was subjected to hepatic metabolism in HepG2 cells either without or with catechol O-methyl transferase (COMT) inhibitor. To identify hepatic metabolites of luteolin without (luteolin metabolites, LMs) or with COMT inhibitor (LMs+CI), metabolites were treated by β-glucuronidase and sulfatase, and found that they were composed of glucuronide and sulfate conjugates of diosmetin in LMs or these conjugates of luteolin in LMs+CI...
January 10, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28071050/hydroxytyrosol-and-the-colonic-metabolites-derived-from-virgin-olive-oil-intake-induce-cell-cycle-arrest-and-apoptosis-in-colon-cancer-cells
#5
Maria-Carmen López de Las Hazas, Carme Piñol, Alba Macià, Maria José Motilva
After the sustained consumption of virgin olive oil (VOO) the unabsorbed native phenols (mainly hydroxytyrosol (HT)) are transformed into its catabolites in the intestine by microbials. The role of these catabolites in preventing colon cancer has not been sufficiently investigated. This work aims to study the antiproliferative and apoptotic activity in colon (Caco-2; HT-29) cancer cell lines of the main catabolites detected in human feces (phenylacetic, phenylpropionic, hydroxyphenylpropionic and dihydroxyphenylpropionic acids and catechol), after the VOO maintained intake...
January 10, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28070581/structural-and-magnetic-properties-of-semiquinonate-based-al-iii-and-ga-iii-complexes
#6
Chinmoy Das, Pragya Shukla, Lorenzo Sorace, Maheswaran Shanmugam
The reaction of anhydrous MCl3 (M = Al(iii) or Ga(iii)) with one-electron-reduced 3,5-di-tert-butyl-1,2-ortho-benzoquinone (using metallic sodium) led us to isolate two distinct metal complexes of Al(iii) and Ga(iii), which were structurally and magnetically characterized. Complex 1 crystallized in the monoclinic P21/n space group, whereas 2 crystallized in the triclinic P1[combining macron] space group. Interestingly, whereas the Al(iii) derivative was obtained as a dimer with the molecular formula [Al2(μ-HL(-))2(L˙(-))4] (1) (where L˙(-) is a semiquinonate radical and HL(-) is a monoanionic catecholate ligand), the Ga(iii) derivative crystallized as [Ga(L˙(-))3] (2), which is a polymorph of a previously reported complex...
January 10, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28069584/role-of-norepinephrine-in-a%C3%AE-related-neurotoxicity-dual-interactions-with-tyr10-and-snk-26-28-of-a%C3%AE
#7
Mengmeng Liu, Liping Wan, Yannan Bin, Juan Xiang
With their capability to inhibit the formation of amyloid-β peptide (Aβ) fibril, norepinephrine (NE), and other catechol derivatives have been considered for the potential treatment of Alzheimer's disease (AD). Such treatment, however, remains debatable because of the diverse functions of Aβ and NE in AD pathology. Moreover, the complicated oxidation accompanying NE has caused the majority of the previous research to focus on the binding of NE oxides onto Aβ. The molecular mechanism by which Aβ interacts with the reduction state of NE, which is correlated with the brain function, should be urgently explored...
January 8, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/28068475/fabrication-of-stretchable-nanocomposites-with-high-energy-density-and-low-loss-from-cross-linked-pvdf-filled-with-poly-dopamine-encapsulated-batio3
#8
Yunchuan Xie, Yangyang Yu, Yefeng Feng, Wanrong Jiang, Zhicheng Zhang
In this report, a simple solution-cast method was employed to prepare poly(dopamine) (PDA) encapsulated BaTiO3 (BT) nanoparticle (PDA@BT) filled composites using PVDF matrix cross-linked by the free radical initiator. The effects of both the particle encapsulation and matrix cross-linking on the mechanical and dielectric properties of the composites were carefully investigated. The results suggested that the introduction of BT particles improved permittivity of the composites to ∼30 at 100 Hz when particle contents of only 7 wt % were utilized...
January 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28068092/systematic-quantum-mechanical-region-determination-in-qm-mm-simulation
#9
Maria Karelina, Heather J Kulik
Hybrid quantum mechanical-molecular mechanical (QM/MM) simulations are widely used in enzyme simulation. Over ten convergence studies of QM/MM methods have revealed over the past several years that key energetic and structural properties approach asymptotic limits with only very large (ca. 500-1000 atom) QM regions. This slow convergence has been observed to be due in part to significant charge transfer between the core active site and surrounding protein environment, which cannot be addressed by improvement of MM force fields or the embedding method employed within QM/MM...
January 9, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28066708/right-inferior-frontal-cortex-activity-correlates-with-tolcapone-responsivity-in-problem-and-pathological-gamblers
#10
Andrew S Kayser, Taylor Vega, Dawn Weinstein, Jan Peters, Jennifer M Mitchell
Failures of self-regulation in problem and pathological gambling (PPG) are thought to emerge from failures of top-down control, reflected neurophysiologically in a reduced capacity of prefrontal cortex to influence activity within subcortical structures. In patients with addictions, these impairments have been argued to alter evaluation of reward within dopaminergic neuromodulatory systems. Previously we demonstrated that augmenting dopamine tone in frontal cortex via use of tolcapone, an inhibitor of the dopamine-degrading enzyme catechol-O-methyltransferase (COMT), reduced delay discounting, a measure of impulsivity, in healthy subjects...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28065387/phenol-degradation-and-genotypic-analysis-of-dioxygenase-genes-in-bacteria-isolated-from-sediments
#11
Mengyang Tian, Dongyun Du, Wei Zhou, Xiaobo Zeng, Guojun Cheng
The aerobic degradation of aromatic compounds by bacteria is performed by dioxygenases. To show some characteristic patterns of the dioxygenase genotype and its degradation specificities, twenty-nine gram-negative bacterial cultures were obtained from sediment contaminated with phenolic compounds in Wuhan, China. The isolates were phylogenetically diverse and belonged to 10 genera. All 29 gram-negative bacteria were able to utilize phenol, m-dihydroxybenzene and 2-hydroxybenzoic acid as the sole carbon sources, and members of the three primary genera Pseudomonas, Acinetobacter and Alcaligenes were able to grow in the presence of multiple monoaromatic compounds...
December 22, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28060209/catechol-o-methyltransferase-genotypes-and-parenting-influence-on-long-term-executive-functioning-after-moderate-to-severe-early-childhood-traumatic-brain-injury-an-exploratory-study
#12
Brad G Kurowski, Amery Treble-Barna, Huaiyu Zang, Nanhua Zhang, Lisa J Martin, Keith Owen Yeates, H Gerry Taylor, Shari L Wade
OBJECTIVES: To examine catechol-O-methyltransferase (COMT) rs4680 genotypes as moderators of the effects of parenting style on postinjury changes in parent behavior ratings of executive dysfunction following moderate to severe early childhood traumatic brain injury. SETTING: Research was conducted in an outpatient setting. PARTICIPANTS: Participants included children admitted to hospital with moderate to severe traumatic brain injury (n = 55) or orthopedic injuries (n = 70) between ages 3 and 7 years...
January 5, 2017: Journal of Head Trauma Rehabilitation
https://www.readbyqxmd.com/read/28056918/fermented-blueberry-juice-extract-and-its-specific-fractions-have-an-anti-adipogenic-effect-in-3%C3%A2-t3-l1-cells
#13
Mayra L Sánchez-Villavicencio, Melinda Vinqvist-Tymchuk, Wilhelmina Kalt, Chantal Matar, Francisco J Alarcón Aguilar, Maria Del Carmen Escobar Villanueva, Pierre S Haddad
BACKGROUND: Obesity and Type 2 diabetes have reached epidemic status worldwide. Wild lowbush blueberry (Vaccinium angustifolium Aiton) is a plant of the North American Aboriginal traditional pharmacopeia with antidiabetic potential, especially when it is fermented with Serratia vaccinii. METHODS: A phytochemical fractionation scheme was used to identify potential bioactive compounds as confirmed by HPLC retention times and UV-Vis spectra. 3 T3-L1 cells were differentiated for 7 days with either Normal Blueberry Extract (NBE), Fermented Blueberry Extract (FBE/F1), seven fractions and four pure compounds...
January 6, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28055205/interfacial-solvation-and-surface-ph-of-phenol-and-dihydroxybenzene-aqueous-nanoaerosols-unveiled-by-aerosol-vuv-photoelectron-spectroscopy
#14
Ping-Cheng Lin, Zhong-Hang Wu, Meng-Sin Chen, Yu-Lin Li, Wei-Ren Chen, Tzu-Ping Huang, Yin-Yu Lee, Chia C Wang
While the significance of aqueous interfaces has been recognized in numerous important fields, it can be even more prominent for nanoscaled aqueous aerosols due to their large surface-to-volume ratios and prevalent existence in nature. Also, considering that organic species are often mixed with aqueous aerosols in nature, a fundamental understanding on the electronic and structural properties of organic species in aqueous nanoaerosols is essential to learn the interplay between water and organic solutes under the nanoscaled size regime...
January 5, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28054678/synthesis-and-characterisation-of-ruthenium-nitrosyl-complexes-in-oxygen-rich-ligand-environments
#15
V Mahesh Krishnan, Hadi D Arman, Zachary J Tonzetich
A series of new {Ru-NO}(6) complexes containing Kläui's tripodal oxygen ligand, [CpCo{P(O)(OMe)2}3](-) (LOMe), and substituted catecholates have been prepared by chloride exchange with [Ru(LOMe)(NO)Cl2]. The [Ru(LOMe)(NO)(cat)] complexes (cat = dianion of catechol, 3,5-di-tert-butylcatechol, tetrabromocatechol, or 2,3-dihydroxynaphthalene) demonstrate spectroscopic features and redox properties consistent with the electronic character of the catecholate ligands. Several of the compounds display reversible oxidation events by cyclic voltammetry arising from the redox non-innocence of the catecholate ligands...
January 5, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28053825/bioactive-flavonoids-and-catechols-as-hif1-and-nrf2-protein-stabilizers-implications-for-parkinson-s-disease
#16
Natalya A Smirnova, Navneet Ammal Kaidery, Dmitry M Hushpulian, Ilay I Rakhman, Andrey A Poloznikov, Vladimir I Tishkov, Saravanan S Karuppagounder, Irina N Gaisina, Anton Pekcec, Klaus Van Leyen, Sergey V Kazakov, Lichuan Yang, Bobby Thomas, Rajiv R Ratan, Irina G Gazaryan
Flavonoids are known to trigger the intrinsic genetic adaptive programs to hypoxic or oxidative stress via estrogen receptor engagement or upstream kinase activation. To reveal specific structural requirements for direct stabilization of the transcription factors responsible for triggering the antihypoxic and antioxidant programs, we studied flavones, isoflavones and catechols including dihydroxybenzoate, didox, levodopa, and nordihydroguaiaretic acid (NDGA), using novel luciferase-based reporters specific for the first step in HIF1 or Nrf2 protein stabilization...
December 2016: Aging and Disease
https://www.readbyqxmd.com/read/28049082/catechol-o-methyltransferase-val-108-158-met-polymorphism-affects-fronto-limbic-connectivity-during-emotional-processing-in-bipolar-disorder
#17
B Vai, M Riberto, S Poletti, I Bollettini, C Lorenzi, C Colombo, F Benedetti
Catechol-O-methyltransferase (COMT) inactivates catecholamines, Val/Val genotype was associated to an increased amygdala (Amy) response to negative stimuli and can influence the symptoms severity and the outcome of bipolar disorder, probably mediated by the COMT polymorphism (rs4680) interaction between cortical and subcortical dopaminergic neurotransmission. The aim of this study is to explore how rs4680 and implicit emotional processing of negative emotional stimuli could interact in affecting the Amy connectivity in bipolar depression...
December 30, 2016: European Psychiatry: the Journal of the Association of European Psychiatrists
https://www.readbyqxmd.com/read/28045245/performance-of-nir-mediated-antibacterial-continuous-flow-microreactors-prepared-by-mussel-inspired-immobilization-of-cs0-33wo3-photothermal-agents
#18
Young Kwang Kim, Eun Bi Kang, Sung Min Kim, Chan Pil Park, Insik In, Sung Young Park
An antibacterial continuous flow microreactor was successfully prepared by sequential mussel-inspired surface engineering of microchannels by using catechol-grafted poly(N-vinyl pyrrolidone) and immobilization of near-infrared active Cs0.33WO3 nanoparticles inside the polydimethylsiloxane(PDMS)-based microreactors. Excellent phothothermal antibacterial acitivity over 99.9% was accomplished toward gram-positive and -negative bacteria upon near-infrared irradiation during continuous operation up to 30 days. This was achieved without releasing Cs0...
January 3, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28042856/effect-of-selected-plant-phenolics-on-fe-2-edta-h%C3%A2-o%C3%A2-system-mediated-deoxyribose-oxidation-molecular-structure-derived-relationships-of-anti-and-pro-oxidant-actions
#19
Jeffrey de Graft-Johnson, Dariusz Nowak
In the presence of transition metal ions and peroxides, polyphenols, well-known dietary antioxidants, can act as pro-oxidants. We investigated the effect of 13 polyphenols and their metabolites on oxidative degradation of deoxyribose by an (•)OH generating Fenton system (Fe(2+)-ethylenediaminetetraacetic acid (EDTA)-H₂O₂). The relationship between phenolics pro-oxidant/anti-oxidant effects and their molecular structure was analyzed using multivariate analysis with multiple linear regression and a backward stepwise technique...
December 31, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28042340/systemic-sirna-delivery-with-a-dual-ph-responsive-and-tumor-targeted-nanovector-for-inhibiting-tumor-growth-and-spontaneous-metastasis-in-orthotopic-murine-model-of-breast-carcinoma
#20
Bo Fan, Lin Kang, Liqing Chen, Ping Sun, Mingji Jin, Qiming Wang, You Han Bae, Wei Huang, Zhonggao Gao
Phenylboronic acid (PBA)-mediated tumor targeting nanovector is an attractive strategy for enhancing siRNA delivery and treatment of metastatic cancers. However, its nonspecific binding with various biological membranes containing cis-diol moieties restricts its potential application by systematic administration. Herein, we constructed a novel pH-activated "sheddable" PEG-coated nanoparticle for effective treatment of primary tumors and metastases, which was based on the conjugation of catechol group modified poly(ethylene glycol) (PEG-Cat) and PBA-terminated polyethylenimine (PEI-PBA) via the borate ester formed between PBA and Cat...
2017: Theranostics
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