keyword
MENU ▼
Read by QxMD icon Read
search

Hydroxymethylation

keyword
https://www.readbyqxmd.com/read/28550651/a-new-biphenyl-ether-derivative-produced-by-indonesian-ascidian-derived-penicillium-albobiverticillium
#1
Deiske A Sumilat, Hiroyuki Yamazaki, Kotaro Endo, Henki Rotinsulu, Defny S Wewengkang, Kazuyo Ukai, Michio Namikoshi
A new biphenyl ether derivative, 2-hydroxy-6-(2'-hydroxy-3'-hydroxymethyl-5-methylphenoxy)-benzoic acid (1), was isolated together with the known benzophenone derivative, monodictyphenone (2), from a culture broth of Indonesian ascidian-derived Penicillium albobiverticillium TPU1432 by solvent extraction, ODS column chromatography, and preparative HPLC (ODS). The structure of 1 was elucidated based on NMR experiments. Compound 2 exhibited moderate inhibitory activities against protein tyrosine phosphatase (PTP) 1B, T cell PTP (TCPTP), and CD45 tyrosine phosphatase (CD45), whereas compound 1 modestly inhibited CD45 activity...
May 26, 2017: Journal of Natural Medicines
https://www.readbyqxmd.com/read/28550469/isolation-and-functional-characterization-of-3-phosphoglycerate-dehydrogenase-involved-in-salt-responses-in-sugar-beet
#2
Kunihide Kito, Koichi Tsutsumi, Vandna Rai, Cattarin Theerawitaya, Suriyan Cha-Um, Nana Yamada-Kato, Shota Sakakibara, Yoshito Tanaka, Teruhiro Takabe
The present study investigated the significance of serine biosynthetic genes for salt stress in sugar beet (Beta vulgaris). We isolated a total of four genes, two each encoding D-3-phosphoglycerate dehydrogenase (BvPGDHa and BvPGDHb) and serine hydroxymethyl transferase (BvSHMTa and BvSHMTb). mRNA transcriptional expression for BvPGDHa was significantly enhanced under salt stress conditions in both leaves and roots of sugar beet, whereas it was reduced for BvPGDHb. On the other hand, BvSHMTa was expressed transiently in leaves and roots under salt stress, whereas expression level of BvSHMTb was not altered...
May 26, 2017: Protoplasma
https://www.readbyqxmd.com/read/28539730/near-infrared-spectroscopy-as-a-process-analytical-technology-tool-for-monitoring-the-parching-process-of-traditional-chinese-medicine-based-on-two-kinds-of-chemical-indicators
#3
Kaiyue Li, Weiying Wang, Yanping Liu, Su Jiang, Guo Huang, Liming Ye
BACKGROUND: The active ingredients and thus pharmacological efficacy of traditional Chinese medicine (TCM) at different degrees of parching process vary greatly. OBJECTIVE: Near-infrared spectroscopy (NIR) was used to develop a new method for rapid online analysis of TCM parching process, using two kinds of chemical indicators (5-(hydroxymethyl) furfural [5-HMF] content and 420 nm absorbance) as reference values which were obviously observed and changed in most TCM parching process...
April 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28537228/-current-methods-of-extracellular-dna-methylation-analysis
#4
O E Bryzgunova, P P Laktionov
The discovery of the enormous role methylated cytosine plays in regulating gene expression has led to the development of a variety of techniques for detecting cytosine modification. A majority of these techniques are geared towards analyzing genomic DNA, which is typically available in large quantities. The concentration of cell-free DNAs (cfDNA) extracted from biological fluids including plasma, saliva, tears, or urine is relatively low and their degree of the fragmentation is high. Moreover, for noninvasive diagnostics of cancer, methylation patterns must be studied in minor cancer-specific fractions of DNA molecules substantially diluted by excess unmethylated molecules...
March 2017: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/28535054/tuning-the-binding-dynamics-of-a-guest-octaacid-capsule-through-noncovalent-anchoring
#5
Suma S Thomas, Hao Tang, Adam Gaudes, Signe B Baggesen, Corinne L D Gibb, Bruce C Gibb, Cornelia Bohne
Hydrophobic or hydrophilic substituents have different effects on the binding dynamics of pyrene derivatives with a 2:1 capsule formed from two octaacid cavitands, showing a subtle interplay of different kinetic factors. Anchoring of the methyl group of 1-methylpyrene within one cavitand slowed the association and dissociation dynamics of the 1:1 complex by at least 1000 times when compared to the 1:1 complex for pyrene. This slow down for the transient formation of the 1:1 complex is responsible for the overall increase in stability of the 2:1 complex without affecting the overall capsule dissociation...
May 25, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28531852/two-step-sequential-pretreatment-for-the-enhanced-enzymatic-hydrolysis-of-coffee-spent-waste
#6
Rajeev Ravindran, Swarna Jaiswal, Nissreen Abu-Ghannam, Amit K Jaiswal
In the present study, eight different pretreatments of varying nature (physical, chemical and physico-chemical) followed by a sequential, combinatorial pretreatment strategy was applied to spent coffee waste to attain maximum sugar yield. Pretreated samples were analysed for total reducing sugar, individual sugars and generation of inhibitory compounds such as furfural and hydroxymethyl furfural (HMF) which can hinder microbial growth and enzyme activity. Native spent coffee waste was high in hemicellulose content...
May 11, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28528117/composite-elastomeric-polyurethane-scaffolds-incorporating-small-intestinal-submucosa-for-soft-tissue-engineering
#7
Lincui Da, Mei Gong, Anjing Chen, Yi Zhang, Yizhou Huang, Zhijun Guo, Shengfu Li, Jesse Li-Ling, Li Zhang, Huiqi Xie
Although soft tissue replacement has been clinically successful in many cases, the corresponding procedure has many limitations including the lack of resilience and mechanical integrity, significant donor-site morbidity, volume loss with time, and fibrous capsular contracture. These disadvantages can be alleviated by utilizing bio-absorbable scaffolds with high resilience and large strain, which are capable of stimulating natural tissue regeneration. Hence, the chemically crosslinked tridimensional scaffolds obtained by incorporating water-based polyurethane (PU) (which was synthesized from polytetramethylene ether glycol, isophorone diisocyanate, and 2,2-bis(hydroxymethyl) butyric acid) into a bioactive extracellular matrix consisting of small intestinal submucosa (SIS) have been tested in this study to develop a new approach for soft tissue engineering...
May 17, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28527463/sub-doppler-infrared-spectroscopy-of-ch2oh-radical-in-a-slit-supersonic-jet-vibration-rotation-tunneling-dynamics-in-the-symmetric-ch-stretch-manifold
#8
Michael D Schuder, Fang Wang, Chih-Hsuan Chang, David J Nesbitt
The sub-Doppler CH-symmetric stretch (ν3) infrared absorption spectrum of a hydroxymethyl (CH2OH) radical is observed and analyzed with the radical formed in a slit-jet supersonic discharge expansion (Trot = 18 K) via Cl atom mediated H atom abstraction from methanol. The high sensitivity of the spectrometer and reduced spectral congestion associated with the cooled expansion enable first infrared spectroscopic observation of hydroxymethyl transitions from both ± symmetry tunneling states resulting from large amplitude COH torsional motion...
May 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28525281/interaction-of-7-alkoxycoumarins-with-the-aryl-hydrocarbon-receptor
#9
Marco Gargaro, Francesco Epifano, Serena Fiorito, Vito Alessandro Taddeo, Salvatore Genovese, Matteo Pirro, Antonella Turco, Paolo Puccetti, Carsten B Schmidt-Weber, Francesca Fallarino
The aryl hydrocarbon receptor (AhR) is a transcription factor activated by a vast array of natural and synthetic ligands. It plays a pivotal role in numerous physiological and pathological responses, such as cell proliferation and differentiation, induction of xenobiotic metabolizing enzymes, response to environmental toxins, and several others. In this study, we investigated the ability of some natural compounds (oxyprenylated ferulic acid and umbelliferone derivatives) and their semisynthetic analogues (e...
May 19, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28523538/mecp2-a-modulator-of-neuronal-chromatin-organization-involved-in-rett-syndrome
#10
Alexia Martínez de Paz, Juan Ausió
From an epigenetic perspective, the genomic chromatin organization of neurons exhibits unique features when compared to somatic cells. Methyl CpG binding protein 2 (MeCP2), through its ability to bind to methylated DNA, seems to be a major player in regulating such unusual organization. An important contribution to this uniqueness stems from the intrinsically disordered nature of this highly abundant chromosomal protein in neurons. Upon its binding to methylated/hydroxymethylated DNA, MeCP2 is able to recruit a plethora of interacting protein and RNA partners...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28515048/essential-function-of-the-serine-hydroxymethyl-transferase-shmt-gene-during-rapid-syncytial-cell-cycles-in-drosophila
#11
Franziska Winkler, Maria Kriebel, Michaela Clever, Stephanie Gröning, Jörg Großhans
Many metabolic enzymes are evolutionary highly conserved and serve a central function for catabolism and anabolism of cells. The serine hydroxymethyl transferase (SHMT) catalysing the conversion of serine and glycine and vice versa feeds into the tetrahydrofolate mediated C1 metabolism. We identified a Drosophila mutation in SHMT (CG3011) in a screen for blastoderm mutants. Embryos from SHMT mutant germline clones specifically arrest the cell cycle in interphase 13 at the time of the mid blastula transition (MBT) and prior to cellularisation...
May 17, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28514015/preparation-of-mesoporous-basic-mixed-metal-oxides-through-assembly-of-monodispersed-mg-al-layered-double-hydroxide-nanoparticles
#12
Yuya Oka, Yoshiyuki Kuroda, Takamichi Matsuno, Keigo Kamata, Hiroaki Wada, Atsushi Shimojima, Kazuyuki Kuroda
Mesoporous basic Mg-Al mixed metal oxides (MMOs) with a high surface area and large pore size were prepared through the assembly of monodispersed layered double hydroxide nanoparticles (LDHNPs) with block copolymer templates. The particle sizes of the LDHNPs were controlled mainly by varying the concentration of tris(hydroxymethyl)aminomethane (THAM), which was used as a surface stabilizing agent for the LDHNPs. LDHNPs and micelles of a block copolymer (Pluronic F127) were assembled to form a composite. The composites were calcined to transform them into mesoporous MMOs and remove the templates...
May 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28513825/loss-of-tet1-facilitates-dld1-colon-cancer-cell-migration-via-h3k27me3-mediated-down-regulation-of-e-cadherin
#13
Zhen Zhou, Hong-Sheng Zhang, Yang Liu, Zhong-Guo Zhang, Guang-Yuan Du, Hu Li, Xiao-Ying Yu, Ying-Hui Huang
Epigenetic modifications such as histone modifications and cytosine hydroxymethylation are linked to tumorigenesis. Loss of 5-hydroxymethylcytosine (5hmC) by ten-eleven translocation 1 (TET1) down-regulation facilitates tumor initiation and development. However, the mechanisms by which loss of TET1 knockdown promotes malignancy development remains unclear. Here, we report that TET1 knockdown induced epithelial-mesenchymal transition (EMT) and increased cancer cell growth, migration and invasion in DLD1 cells...
May 17, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28505334/direction-a-machine-learning-framework-for-predicting-and-characterizing-dna-methylation-and-hydroxymethylation-in-mammalian-genomes
#14
Milos Pavlovic, Pradipta Ray, Kristina Pavlovic, Aaron Kotamarti, Min Chen, Michael Q Zhang
Motivation: 5-Methylcytosine and 5-Hydroxymethylcytosine in DNA are major epigenetic modifications known to significantly alter mammalian gene expression. High-throughput assays to detect these modifications are expensive, labor-intensive, unfeasible in some contexts, and leave a portion of the genome unqueried. Hence, we devised a novel, supervised, integrative learning framework to perform whole-genome methylation and hydroxymethylation predictions in CpG dinucleotides. Our framework can also perform imputation of missing or low quality data in existing sequencing datasets...
May 12, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28504700/lineage-specific-functions-of-tet1-in-the-postimplantation-mouse-embryo
#15
Rita Khoueiry, Abhishek Sohni, Bernard Thienpont, Xinlong Luo, Joris Vande Velde, Michela Bartoccetti, Bram Boeckx, An Zwijsen, Anjana Rao, Diether Lambrechts, Kian Peng Koh
The mammalian TET enzymes catalyze DNA demethylation. While they have been intensely studied as major epigenetic regulators, little is known about their physiological roles and the extent of functional redundancy following embryo implantation. Here we define non-redundant roles for TET1 at an early postimplantation stage of the mouse embryo, when its paralogs Tet2 and Tet3 are not detectably expressed. TET1 regulates numerous genes defining differentiation programs in the epiblast and extraembryonic ectoderm...
May 15, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28501209/a-sensitive-signal-off-electrogenerated-chemiluminescence-biosensing-method-for-the-discrimination-of-dna-hydroxymethylation-based-on-glycosylation-modification-and-signal-quenching-from-ferroceneboronic-acid
#16
Yuling Zhang, Yan Li, Yingying Wei, Huiping Sun, Huan Wang
In this study, a new and sensitive signal-off electrogenerated chemiluminescence (ECL) biosensing method for the quantification of 5-hydroxymethylcytosine in DNA (5-hmC-DNA) was developed. The method achieved simple and sensitive detection of 5-hmC-DNA based on the glycosylation of 5-hmC, combining both the amplification function of gold nanoparticles (AuNPs) and the high quenching efficiency of the tris(2, 2'-ripyridine) dichlororuthenium(II) (Ru(bpy)3(2+))-ferrocene (Fc) system. First, the electrode modified with a mixture of Nafion and AuNPs was utilized as the platform for electrostatically adsorbing Ru(bpy)3(2+)(an ECL-emitting species) and assembling 5-hmC-DNA...
August 1, 2017: Talanta
https://www.readbyqxmd.com/read/28497329/effect-of-cadmium-on-cytosine-hydroxymethylation-in-gastropod-hepatopancreas
#17
Dragos Nica, Cristina Popescu, George Draghici, Ionela Privistirescu, Maria Suciu, Reinhard Stöger
5-Hydroxymethylcytosine (5hmC) is an important, yet poorly understood epigenetic DNA modification, especially in invertebrates. Aberrant genome-wide 5hmC levels have been associated with cadmium (Cd) exposure in humans, but such information is lacking for invertebrate bioindicators. Here, we aimed to determine whether this epigenetic mark is present in DNA of the hepatopancreas of the land snail Cantareus aspersus and is responsive to Cd exposure. Adult snails were reared under laboratory conditions and exposed to graded amounts of dietary cadmium for 14 days...
May 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28493678/deciphering-the-structural-relationships-of-five-cd-based-metal-organic-frameworks
#18
Feng-Ling Yuan, Yan-Qiu Yuan, Meng-Yao Chao, David J Young, Wen-Hua Zhang, Jian-Ping Lang
The one-pot reaction of Cd(NO3)2·4H2O and 5-(6-(hydroxymethyl)pyridin-3-yl)isophthalic acid (H2L) in DMF/H2O (DMF = N,N-dimethylformamide) produced a two-dimensional (2D) metal-organic framework (MOF) of [Cd(L)(H2O)2] (A) bearing aqua-bridged Cd centers, accompanied by two three-dimensional (3D) MOFs [Cd(L)(DMF)0.5] (B) and [Cd(L)] (C). Removing the bridging aqua molecules of A by heating led to the formation of an additional 3D MOF of [Cd(L)] (D) in a single-crystal to single-crystal (SCSC) manner. The search for the preceding compound that could convert to A resulted in the isolation of a 2D MOF [Cd(L)(DMF)] (E) that readily converted to A in water, but with the loss of single crystallinity...
May 11, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28490123/kinetics-of-conversion-of-dihydroxyacetone-to-methylglyoxal-in-new-zealand-m%C3%A4-nuka-honey-part-iv-formation-of-hmf
#19
Megan N C Grainger, Adrian Owens, Merilyn Manley-Harris, Joseph R Lane, Richard J Field
During a study of the conversion of dihydroxyacetone (DHA) to methylglyoxal (MGO) in maturing New Zealand mānuka honey, the kinetics of formation of 5-(hydroxymethyl)furfural (HMF) was studied at temperatures from 4 to 37°C. Formation of HMF was first-order during an induction period and zero-order thereafter indicating that the mechanism includes the formation of certain critical intermediates and that these require time to build up; the duration of the induction period depended primarily upon temperature...
October 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28489894/analysis-of-global-dna-methylation-changes-in-primary-human-fibroblasts-in-the-early-phase-following-x-ray-irradiation
#20
Anna Maierhofer, Julia Flunkert, Marcus Dittrich, Tobias Müller, Detlev Schindler, Indrajit Nanda, Thomas Haaf
Epigenetic alterations may contribute to the generation of cancer cells in a multi-step process of tumorigenesis following irradiation of normal body cells. Primary human fibroblasts with intact cell cycle checkpoints were used as a model to test whether X-ray irradiation with 2 and 4 Gray induces direct epigenetic effects (within the first cell cycle) in the exposed cells. ELISA-based fluorometric assays were consistent with slightly reduced global DNA methylation and hydroxymethylation, however the observed between-group differences were usually not significant...
2017: PloS One
keyword
keyword
7181
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"