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Epigenerics or methylation or hypermethylation or hypomethylation or HIV

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https://www.readbyqxmd.com/read/29677643/biotransformation-of-cyclocanthogenol-by-the-endophytic-fungus-alternaria-eureka-1e1bl1
#1
Güner Ekiz, Seda Duman, Erdal Bedir
The microbial transformation of cyclocanthogenol (CCG), Astragalus sp. originated sapogenin, by the endophytic fungus Alternaria eureka 1E1BL1 isolated from Astragalus angustifolius was investigated. Hydroxylation, oxidation, epoxidation, O-methylation, ring-expansion and methyl migration reactions were observed on the triterpenoid skeleton. As a result, eight metabolites were isolated and the structures of the previously undescribed compounds were established by 1-D, 2-D NMR and HR-MS analyses.
April 17, 2018: Phytochemistry
https://www.readbyqxmd.com/read/29677628/circulating-metabolomic-profile-can-predict-dyslipidemia-in-hiv-patients-undergoing-antiretroviral-therapy
#2
Esther Rodríguez-Gallego, Josep Gómez, Pere Domingo, Sara Ferrando-Martínez, Joaquim Peraire, Consuelo Viladés, Sergi Veloso, Miguel López-Dupla, Raúl Beltrán-Debón, Verónica Alba, Montserrat Vargas, Alfonso J Castellano, Manuel Leal, Yolanda María Pacheco, Ezequiel Ruiz-Mateos, Félix Gutiérrez, Francesc Vidal, Anna Rull
BACKGROUND AND AIMS: Dyslipidemia in HIV-infected patients is unique and pathophysiologically associated with host factors, HIV itself and the use of antiretroviral therapy (ART). The use of nuclear magnetic resonance spectroscopy (NMR) provides additional data to conventional lipid measurements concerning the number of lipoprotein subclasses and particle sizes. METHODS: To investigate the ability of lipoprotein profile, we used a circulating metabolomic approach in a cohort of 103 ART-naive HIV-infected patients, who were initiating non-nucleoside analogue transcriptase inhibitor (NNRTI)-based ART, and we subsequently followed up these patients for 36 months...
April 9, 2018: Atherosclerosis
https://www.readbyqxmd.com/read/29677624/metal-free-oxidative-esterification-of-benzylated-monosaccharides
#3
Tchambaga Camara, Abed Bil, Vincent Chagnault
Methyl glyconates have been attracting considerable attention as intermediates for the preparation of aryl C-glycosides, polyphenolic products, aliphatic polyesters, SGLT2 inhibitors, antibiotics etc … In view of the interest in those compounds, we report herein our work on the synthesis of methyl glyconates using an oxidative esterification carried out by molecular iodine. This reaction is catalyzed by non-toxic K4 Fe(CN)6 that releases a small amount of cyanide ion into the reaction mixture. Four benzylated carbohydrates which contain a hemiacetalic functional group have been tested successfully...
April 12, 2018: Carbohydrate Research
https://www.readbyqxmd.com/read/29677541/tert-butyl-4-1-phenyl-1h-pyrazol-4-yl-methyl-piperazine-1-carboxylate-lqfm104-new-piperazine-derivative-with-antianxiety-and-antidepressant-like-effects-putative-role-of-serotonergic-system
#4
Dayane Moreira da Silva, Germán Sanz, Boniek Gontijo Vaz, Flávio Silva de Carvalho, Luciano Morais Lião, Danillo Ramos de Oliveira, Lorrane Kelle da Silva Moreira, Carina Sofia Cardoso, Adriane Ferreira de Brito, Daiany Priscilla Bueno da Silva, Fabio Fagundes da Rocha, Ianca Gontijo Cavalcante Santana, Pablinny Moreira Galdino, Elson Alves Costa, Ricardo Menegatti
The piperazine derivatives correspond to an extensive chemical class of compounds with numerous neuropharmacological activities, including antidepressant (e.g., nefazodone, trazodone) and anxiolytic (e.g., buspirone) properties. Therefore, aiming to identify a new antidepressant and antianxiety lead-compound, our group designed, synthesized, and investigated the effects of a new piperazine compound, namely, LQFM104, on the behavior of mice. Male albino Swiss mice were treated with LQFM104 prior to predictive behavioral tests as open field (OFT), elevated plus maze (EPM), forced swimming (FST), and tail suspension tests (TST)...
April 17, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29677526/anti-inflammatory-effects-of-4-o-methyl-benzenesulfonyl-benzoxazolone-mbb-in-vivo-and-in-vitro-as-a-novel-nsaids-lead-compound
#5
Li Tang, Jie-Ran Luo, Dai-Tian Li, Rui Ge, Yun-Long Ma, Fei Xu, Tai-Gang Liang, Shu-Rong Ban, Qing-Shan Li
BACKGROUND: Great attention has been paid to the development of novel anti-inflammatory drugs to overcome the adverse reactions of traditional drugs. Recently, a new compound 4-o-methyl-benzenesulfonyl benzoxazolone (MBB) we have prepared attracted our attention for its promising anti-inflammatory activity and low toxicity. The present study aimed to further investigate the anti-inflammatory effects of MBB both in vivo and in vitro in order to determine its potential as a novel NSAIDs lead compound...
December 15, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29677515/fus-phase-separation-is-modulated-by-a-molecular-chaperone-and-methylation-of-arginine-cation-%C3%AF-interactions
#6
Seema Qamar, GuoZhen Wang, Suzanne J Randle, Francesco Simone Ruggeri, Juan A Varela, Julie Qiaojin Lin, Emma C Phillips, Akinori Miyashita, Declan Williams, Florian Ströhl, William Meadows, Rodylyn Ferry, Victoria J Dardov, Gian G Tartaglia, Lindsay A Farrer, Gabriele S Kaminski Schierle, Clemens F Kaminski, Christine E Holt, Paul E Fraser, Gerold Schmitt-Ulms, David Klenerman, Tuomas Knowles, Michele Vendruscolo, Peter St George-Hyslop
Reversible phase separation underpins the role of FUS in ribonucleoprotein granules and other membrane-free organelles and is, in part, driven by the intrinsically disordered low-complexity (LC) domain of FUS. Here, we report that cooperative cation-π interactions between tyrosines in the LC domain and arginines in structured C-terminal domains also contribute to phase separation. These interactions are modulated by post-translational arginine methylation, wherein arginine hypomethylation strongly promotes phase separation and gelation...
April 19, 2018: Cell
https://www.readbyqxmd.com/read/29677514/phase-separation-of-fus-is-suppressed-by-its-nuclear-import-receptor-and-arginine-methylation
#7
Mario Hofweber, Saskia Hutten, Benjamin Bourgeois, Emil Spreitzer, Annika Niedner-Boblenz, Martina Schifferer, Marc-David Ruepp, Mikael Simons, Dierk Niessing, Tobias Madl, Dorothee Dormann
Cytoplasmic FUS aggregates are a pathological hallmark in a subset of patients with frontotemporal dementia (FTD) or amyotrophic lateral sclerosis (ALS). A key step that is disrupted in these patients is nuclear import of FUS mediated by the import receptor Transportin/Karyopherin-β2. In ALS-FUS patients, this is caused by mutations in the nuclear localization signal (NLS) of FUS that weaken Transportin binding. In FTD-FUS patients, Transportin is aggregated, and post-translational arginine methylation, which regulates the FUS-Transportin interaction, is lost...
April 19, 2018: Cell
https://www.readbyqxmd.com/read/29677499/the-structural-properties-of-5-methyl-2-phenyl-2h-1-2-3-triazole-4-carboxylic-acid-and-chromogenic-mechanism-on-its-rhodamine-b-derivatives-to-hg-2-ions
#8
Jianling Li, Guohua Ding, Yanyan Niu, Luyong Wu, Huajie Feng, Wenying He
5-Methyl-2-phenyl-2H-1,2,3-triazole-4-carboxylic acid (MPTC), a newly synthesized compound, was explored to study the structural properties and theoretical spectra by using GaussView5.0 program package and the time dependent density functional theory (TD DFT). The calculated quantum chemical values suggested that it is easy for MPTC to lose electron with weak electron accepting ability. And the results of experimental measurements on fluorescence and absorption spectra were consistent with that of the calculated spectra in great degree...
April 11, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29677389/population-pharmacokinetics-of-intramuscular-and-intravenous-ketamine-in-children
#9
Christoph P Hornik, Daniel Gonzalez, John van den Anker, Andrew M Atz, Ram Yogev, Brenda B Poindexter, Kee Chong Ng, Paula Delmore, Barrie L Harper, Chiara Melloni, Andrew Lewandowski, Casey Gelber, Michael Cohen-Wolkowiez, Jan Hau Lee
Ketamine is an N-methyl D-aspartate receptor antagonist used off-label to facilitate dissociative anesthesia in children undergoing invasive procedures. Available for both intravenous and intramuscular administration, ketamine is commonly used when vascular access is limited. Pharmacokinetic (PK) data in children are sparse, and the bioavailability of intramuscular ketamine in children is unknown. We performed 2 prospective PK studies of ketamine in children receiving either intramuscular or intravenous ketamine and combined the data to develop a pediatric population PK model using nonlinear mixed-effects methods...
April 20, 2018: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29677286/new-option-for-drug-resistant-hiv
#10
Rebecca Voelker
No abstract text is available yet for this article.
April 17, 2018: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/29677220/hiv-1-adaptation-studies-reveal-a-novel-env-mediated-homeostasis-mechanism-for-evading-lethal-hypermutation-by-apobec3g
#11
Terumasa Ikeda, Menelaos Symeonides, John S Albin, Ming Li, Markus Thali, Reuben S Harris
HIV-1 replication normally requires Vif-mediated neutralization of APOBEC3 antiviral enzymes. Viruses lacking Vif succumb to deamination-dependent and -independent restriction processes. Here, HIV-1 adaptation studies were leveraged to ask whether viruses with an irreparable vif deletion could develop resistance to restrictive levels of APOBEC3G. Several resistant viruses were recovered with multiple amino acid substitutions in Env, and these changes alone are sufficient to protect Vif-null viruses from APOBEC3G-dependent restriction in T cell lines...
April 20, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29677208/modeling-the-dynamics-and-kinetics-of-hiv-1-gag-during-viral-assembly
#12
Michael D Tomasini, Daniel S Johnson, Joshua S Mincer, Sanford M Simon
We report a computational model for the assembly of HIV-1 Gag into immature viral particles at the plasma membrane. To reproduce experimental structural and kinetic properties of assembly, a process occurring on the order of minutes, a coarse-grained representation consisting of a single particle per Gag molecule is developed. The model uses information relating the functional interfaces implicated in Gag assembly, results from cryo electron-tomography, and biophysical measurements from fluorescence microscopy, such as the dynamics of Gag assembly at single virions...
2018: PloS One
https://www.readbyqxmd.com/read/29677205/anemia-in-tuberculosis-cases-and-household-controls-from-tanzania-contribution-of-disease-coinfections-and-the-role-of-hepcidin
#13
Jerry Hella, Colin I Cercamondi, Francis Mhimbira, Mohamed Sasamalo, Nicole Stoffel, Marcel Zwahlen, Thomas Bodmer, Sebastien Gagneux, Klaus Reither, Michael B Zimmermann, Lorenz Risch, Lukas Fenner
BACKGROUND: Tuberculosis (TB) induces a systemic inflammatory state affecting iron homeostasis. Patients with TB often have additional comorbidities such as anemia which can result in poorer treat outcomes. We studied the contribution of anemia and the role of the iron regulatory hormone hepcidin among TB patients and household contacts. METHODS: We analyzed serum samples from 102 TB cases and 98 controls without TB, matched by age/sex, for hepcidin, iron, and inflammation parameters...
2018: PloS One
https://www.readbyqxmd.com/read/29677181/exploiting-glycan-topography-for-computational-design-of-env-glycoprotein-antigenicity
#14
Wen-Han Yu, Peng Zhao, Monia Draghi, Claudia Arevalo, Christina B Karsten, Todd J Suscovich, Bronwyn Gunn, Hendrik Streeck, Abraham L Brass, Michael Tiemeyer, Michael Seaman, John R Mascola, Lance Wells, Douglas A Lauffenburger, Galit Alter
Mounting evidence suggests that glycans, rather than merely serving as a "shield", contribute critically to antigenicity of the HIV envelope (Env) glycoprotein, representing critical antigenic determinants for many broadly neutralizing antibodies (bNAbs). While many studies have focused on defining the role of individual glycans or groups of proximal glycans in bNAb binding, little is known about the effects of changes in the overall glycan landscape in modulating antibody access and Env antigenicity...
April 20, 2018: PLoS Computational Biology
https://www.readbyqxmd.com/read/29677172/elevated-co%C3%A2-concentrations-impact-the-semiochemistry-of-aphid-honeydew-without-having-a-cascade-effect-on-an-aphid-predator
#15
Antoine Boullis, Solène Blanchard, Frédéric Francis, François Verheggen
Honeydew is considered a cornerstone of the interactions between aphids and their natural enemies. Bacteria activity occurring in aphid honeydew typically results in the release of volatile organic compounds (VOCs) that are used by the natural enemies of aphids to locate their prey. Because atmospheric carbon dioxide (CO₂) concentration directly impacts the physiology of plants, we raise the hypothesis that elevated CO₂ concentrations impact the quantity of honeydew produced by aphids, as well as the diversity and quantity of honeydew VOCs, leading to cascade effects on the foraging behavior of aphids' natural enemies...
April 20, 2018: Insects
https://www.readbyqxmd.com/read/29677171/does-bca3-play-a-role-in-the-hiv-1-replication-cycle
#16
Michaela Rumlová, Ivana Křížová, Jaroslav Zelenka, Jan Weber, Tomáš Ruml
The cellular role of breast carcinoma-associated protein (BCA3), also known as A-kinase-interacting protein 1 (AKIP-1), is not fully understood. Recently, we reported that full-length, but not C-terminally truncated, BCA3 is incorporated into virions of Mason-Pfizer monkey virus, and that BCA3 enhances HIV-1 protease-induced apoptosis. In the present study, we report that BCA3 is associated with purified and subtilisin-treated HIV particles. Using a combination of immune-based methods and confocal microscopy, we show that the C-terminus of BCA3 is required for packaging into HIV-1 particles...
April 20, 2018: Viruses
https://www.readbyqxmd.com/read/29677136/cytoplasmic-translocation-of-nucleolar-protein-nop53-promotes-viral-replication-by-suppressing-host-defense
#17
Wen Meng, Shi-Chong Han, Cui-Cui Li, Hui-Jun Dong, Jian-Yu Chang, Hwa-Chain Robert Wang, Xiao-Jia Wang
NOP53 is a tumor suppressor protein located in the nucleolus and is translocated to the cytoplasm during infection by vesicular stomatitis virus (VSV) and herpes simplex virus type 1 (HSV-1), as shown in our previous study. Cytoplasmic NOP53 interacts with the retinoic acid-inducible gene I (RIG-I) to remove its K63-linked ubiquitination, leading to attenuation of type I interferon IFN-β. In the present study, we found no obvious translocation of NOP53 in infection by a mutant virus lacking ICP4 (HSV-1/d120, replication inadequate)...
April 20, 2018: Viruses
https://www.readbyqxmd.com/read/29677135/molecular-evolution-and-expression-divergence-of-hmt-gene-family-in-plants
#18
Man Zhao, Peng Chen, Wenyi Wang, Fengjie Yuan, Danhua Zhu, Zhao Wang, Xiangxian Ying
Homocysteine methyltransferase (HMT) converts homocysteine to methionine using S -methylmethionine (SMM) or S -adenosylmethionine (SAM) as methyl donors in organisms, playing an important role in supplying methionine for the growth and the development of plants. To better understand the functions of the HMT genes in plants, we conducted a wide evolution and expression analysis of these genes. Reconstruction of the phylogenetic relationship showed that the HMT gene family was divided into Class 1 and Class 2...
April 20, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29677122/applications-of-the-fiv-model-to-study-hiv-pathogenesis
#19
REVIEW
Craig Miller, Zaid Abdo, Aaron Ericsson, John Elder, Sue VandeWoude
Feline immunodeficiency virus (FIV) is a naturally-occurring retrovirus that infects domestic and non-domestic feline species, producing progressive immune depletion that results in an acquired immunodeficiency syndrome (AIDS). Much has been learned about FIV since it was first described in 1987, particularly in regard to its application as a model to study the closely related lentivirus, human immunodeficiency virus (HIV). In particular, FIV and HIV share remarkable structure and sequence organization, utilize parallel modes of receptor-mediated entry, and result in a similar spectrum of immunodeficiency-related diseases due to analogous modes of immune dysfunction...
April 20, 2018: Viruses
https://www.readbyqxmd.com/read/29676935/current-and-emerging-two-drug-approaches-for-hiv-1-therapy-in-art-na%C3%A3-ve-and-art-experienced-virologically-suppressed-patients
#20
Barbara Rossetti, Francesca Montagnani, Andrea De Luca
Current guidelines recommend a 2-drug antiretroviral regimen as an alternative to triple antiretroviral therapy (ART) in selected patients to reduce long-term toxicity and costs. Areas covered: This review is intended to provide insight into the efficacy, safety and tolerability of 2-drug versus 3-drug ART in naïve and in treatment-experienced virologically-suppressed patients. Expert opinion: Dual therapy regimens are not feasible in HBV-coinfected individuals and should not be applied during pregnancy. Positive data on 2-drug ART in drug naïve patients are still limited, while, in virologically-suppressed individuals, several regimens have shown non-inferiority as compared to 3-drug regimens...
April 20, 2018: Expert Opinion on Pharmacotherapy
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