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Epigenerics or methylation or hypermethylation or hypomethylation or HIV

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https://www.readbyqxmd.com/read/29458170/downregulation-of-metabotropic-glutamate-receptor-5-inhibits-hepatoma-development-in-a-neurotoxin-rotenone-induced-parkinson-s-disease-model
#1
Xiao Xu Bai, Li Gu, Hui Min Yang, Shao Song Xi, Ning Xia, Song Zhang, Hong Zhang
Clinical epidemiological studies have shown that there is a link between Parkinson's disease (PD) and cancer, but how PD regulates cancer development remains unknown. In our study, the effect of metabotropic glutamate receptor 5 (mGlu5 ) on hepatoma was explored in a rotenone-induced PD model both in vitro and in vivo. We found that conditioned media derived from MN9D dopaminergic neuronal cells by rotenone-induced toxicity inhibited the growth, migration, invasion and promoted apoptosis of Hepa1-6 cells, which corresponded with decreased expression of mGlu5 ...
February 16, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29458150/pink1-protects-auditory-hair-cells-and-spiral-ganglion-neurons-from-cisplatin-induced-ototoxicity-via-inducing-autophagy-and-inhibiting-jnk-signaling-pathway
#2
Qianqian Yang, Gaoying Sun, Haiyan Yin, Hongrui Li, Zhixin Cao, Jinghan Wang, Meijuan Zhou, Haibo Wang, Jianfeng Li
Phosphatase and tensin homologue (PTEN)-induced putative kinase 1 (PINK1) gene encodes a serine/threonine kinase, which acts as a molecular sensor of mitochondrial health necessary for mitochondrial quality control. The present study was designed to examine whether PINK1 expressed in C57BL/6 murine cochlea and HEI-OC1 cells and, if so, to investigate the possible mechanisms underlying the action of PINK1 in cisplatin-induced death of sensory hair cells (HCs) and spiral ganglion neurons (SGNs) in vitro. The expression pattern of PINK1, formation of parkin particles, and autophagy were determined by immunofluorescent staining...
February 16, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29458143/suv39h2-promotes-colorectal-cancer-proliferation-and-metastasis-via-tri-methylation-of-the-slit1-promoter
#3
Wendi Shuai, Jiangxue Wu, Shuai Chen, Ranyi Liu, Zhihua Ye, Chunmei Kuang, Xiang Fu, Gaoyuan Wang, Yingchang Li, Qihua Peng, Wei Shi, Yizhuo Li, Qianghua Zhou, Wenlin Huang
Suppressor of variegation 3-9 homolog 2 (SUV39H2) is a member of the SUV39H subfamily of lysine methyltransferases. Its role in colorectal cancer (CRC) proliferation and metastasis has remained unexplored. Here, we determined that SUV39H2 was upregulated in CRC tissues compared with that in adjacent non-neoplastic tissues. Further statistical analysis revealed that high SUV39H2 expression was strongly associated with distant metastasis (P = 0.016) and TNM stage (P = 0.038) and predicted a shorter overall survival (OS; P = 0...
February 16, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29458132/therapeutic-drug-monitoring-in-treatment-experienced-hiv-infected-patients-receiving-darunavir-based-salvage-regimens-a-case-series
#4
Sébastien Landry, Chi-Nan Chen, Nimish Patel, Alice Tseng, Richard G Lalonde, Denis Thibeault, Steven Sanche, Nancy L Sheehan
Therapeutic drug monitoring (TDM) constitutes a compelling approach for the optimization of antiretroviral therapy in treatment-experienced HIV-1 patients. While various inhibitory indices have been proposed to predict virologic outcome, there is a lack of consensus on the clinical value of TDM. Here, we report the comparative results of TDM in 14 HIV-1-infected patients who had previously received at least two different PI-based regimens and who initiated darunavir (DRV)-based salvage therapy. Pharmacokinetic/pharmacodynamics (PK/PD) parameters were calculated for each subject...
February 16, 2018: Antiviral Research
https://www.readbyqxmd.com/read/29458070/the-epigenetic-alterations-of-endogenous-retroelements-in-aging
#5
REVIEW
Maurizio Cardelli
Endogenous retroelements, transposons that mobilize through RNA intermediates, include some of the most abundant repetitive sequences of the human genome, such as Alu and LINE-1 sequences, and human endogenous retroviruses. Recent discoveries demonstrate that these mobile genetic elements not only act as intragenomic parasites, but also exert regulatory roles in living cells. The risk of genomic instability represented by endogenous retroelements is normally counteracted by a series of epigenetic control mechanisms which include, among the most important, CpG DNA methylation...
February 16, 2018: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/29458018/5-chloro-n4-2-isopropylsulfonyl-phenyl-n2-2-methoxy-4-4-4-methylpiperazin-1-yl-methyl-1h-1-2-3-triazol-1-yl-phenyl-pyrimidine-2-4-diamine-wy-135-a-novel-alk-inhibitor-induces-cell-cycle-arrest-and-apoptosis-through-inhibiting-alk-and-its-downstream-pathways
#6
Mengting Han, Jiwei Shen, Lijing Wang, Yu Wang, Xin Zhai, Yao Li, Meiqiao Liu, Zengqiang Li, Daiying Zuo, Yingliang Wu
Anaplastic lymphoma kinase (ALK)-positive cancers have rising morbidity and mortality in recent years, and novel chemotherapeutic drugs with no drug resistance and high activity for treating ALK-positive cancers are needed urgently. In this study, we investigated the anti-cancer effect of 5-chloro-N4-(2-(isopropylsulfonyl)phenyl)-N2-(2-methoxy-4-(4-((4-methylpiperazin-1-yl)methyl)-1H-1,2,3-triazol-1-yl)phenyl)pyrimidine-2,4-diamine (WY-135), a novel ALK inhibitor, on nucleophosmin-anaplastic lymphoma kinase (NPM-ALK) positive cancer cell line Karpas299 and echinoderm microtubule associated protein like 4-anaplastic lymphoma kinase (EML4-ALK) positive cancer cell line H2228...
February 16, 2018: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29457979/the-samholides-swinholide-related-metabolites-from-a-marine-cyanobacterium-cf-phormidium-sp
#7
Yiwen Tao, Pinglin Li, Daojing Zhang, Evgenia Glukhov, Lena Gerwick, Chen Zhang, Thomas F Murray, William H Gerwick
Cancer cell cytotoxicity was used to guide the isolation of nine new swinholide-related compounds, named samholides A-I (1-9), from an American Samoan marine cyanobacterium cf. Phormidium sp. Their structures were determined by extensive analysis of 1D and 2D NMR spectroscopic data. The new compounds share an unusual 20-demethyl 44-membered lactone ring comprised of two monomers, and they demonstrate structural diversity arising from geometric isomerization of double bonds, sugar units with unique glyceryl moieties and varied methylation patterns...
February 19, 2018: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29457978/size-dependent-thermodynamics-and-kinetics-of-adsorption-on-nanoparticles-a-theoretical-and-experimental-study
#8
Zixiang Cui, Juan Zhang, Yongqiang Xue, Huijuan Duan
Owing to their excellent adsorption properties compared with those of the corresponding bulk materials, nanoparticles have been widely applied in many fields. Their properties depend on the thermodynamics and kinetics of adsorption, which depend on the particle size. In this paper, we present universal theories of the thermodynamics and kinetics for nano-adsorption that have been developed over the past few years. Theoretically, we have derived relationships between the adsorption thermodynamic properties and the particle size, as well as those between the adsorption kinetic parameters and the particle size...
February 19, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29457966/combined-treatment-with-valproic-acid-and-5-aza-2-deoxycytidine-synergistically-inhibits-human-clear-cell-renal-cell-carcinoma-growth-and-migration
#9
Wenjin Xi, Xu Chen, Jinbo Sun, Wei Wang, Yi Huo, Guoxu Zheng, Jieheng Wu, Yufang Li, Angang Yang, Tao Wang
BACKGROUND Histone acetylation and DNA methylation are important mammalian epigenetic modifications that participate in the regulation of gene expression. Because dysregulation of histone deacetylase and DNA methyltransferases are hallmarks of malignancy, they have become promising therapeutic targets. In this study, we explored the anti-tumor activity of valproic acid (VPA), a histone deacetylase inhibitor (HDACi) and 5-Aza-2'-deoxycytidine (5-Aza), an inhibitor of DNA methyltransferases, on renal cell carcinoma (RCC) cell lines 786-O and 769-P...
February 19, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29457925/controlled-release-of-mitomycin-c-from-phemah-cu-ii-cryogel-membranes
#10
Monireh Bakhshpour, Handan Yavuz, Adil Denizli
Molecular imprinting technique was used for the preparation of antibiotic and anti-neoplastic chemotherapy drug (mitomycin C) imprinted cryogel membranes (MMC-ICM). The membranes were synthezied by using metal ion coordination interactions with N-methacryloyl-(l)-histidine methyl ester (MAH) functional monomer and template molecules (i.e. MMC). The 2-hydroxyethyl methacrylate (HEMA) monomer and methylene bisacrylamide (MBAAm) crosslinker were used for the preparation of mitomycin C imprinted cryogel membranes by radical suspension polymerization technique...
February 19, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29457872/simple-method-for-the-determination-of-personal-care-product-ingredients-in-lettuce-by-ultrasound-assisted-extraction-combined-with-solid-phase-microextraction-followed-by-gc-ms
#11
Jerónimo Cabrera-Peralta, Araceli Peña-Alvarez
A simple method for the simultaneous determination of personal care product ingredients: galaxolide, tonalide, oxybenzone, 4-methylbenzyliden camphor, padimate-o, 2-ethylhexyl methoxycinnamate, octocrylene, triclosan and methyl triclosan in lettuce by ultrasound-assisted extraction combined with solid-phase microextraction followed by gas chromatography with mass spectrometry was developed. Lettuce was directly extracted by ultrasound-assisted extraction with methanol, this extract was combined with water, extracted by solid-phase microextraction in immersion mode and analyzed by gas chromatography with mass spectrometry...
February 19, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/29457868/exploring-acceptability-of-oral-prep-prior-to-implementation-among-female-sex-workers-in-south-africa
#12
Robyn Eakle, Adam Bourne, Judie Mbogua, Nyaradzo Mutanha, Helen Rees
INTRODUCTION: Female sex workers (FSWs) are at high-risk for HIV acquisition in South Africa, where the advent of new HIV prevention and treatment interventions represent the potential to significantly impact the epidemic. This paper focuses on aspects of PrEP acceptability as a new intervention within the context of a larger service delivery programme including the simultaneous rollout of early ART. This paper explores PrEP acceptability among the FGD participants as future potential users...
February 2018: Journal of the International AIDS Society
https://www.readbyqxmd.com/read/29457866/epigenetic-effects-of-metformin-from-molecular-mechanisms-to-clinical-implications
#13
REVIEW
S C Bridgeman, G C Ellison, P E Melton, P Newsholme, Cds Mamotte
There is a growing body of evidence that links epigenetic modifications to type 2 diabetes. Researchers have more recently investigated effects of commonly used medications, including those prescribed for diabetes, on epigenetic processes. This work reviews the influence of the widely used antidiabetic drug metformin on epigenomics, microRNA levels and subsequent gene expression and potential clinical implications. Metformin may influence the activity of numerous epigenetic modifying enzymes, mostly via modulating the activation of AMP-activated protein kinase (AMPK)...
February 19, 2018: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/29457816/iodine-promoted-dual-oxidative-c-sp-3-h-amination-of-2-methyl-3-arylquinazolin-4-3h-ones-a-facile-route-to-1-4-diarylimidazo-1-5-a-quinazolin-5-4h-ones
#14
Kavitha Donthiboina, Hari Krishna Namballa, Siddiq Pasha Shaik, Jagadeesh Babu Nanubolu, Nagula Shankaraiah, Ahmed Kamal
An iodine promoted tandem oxidative condensation of benzylamines and 2-methylquinazolin-4-(3H)-ones was developed to yield imidazo[1,5-a]quinazolin-5(4H)-ones via dual C(sp3 )-H amination under metal free conditions in a greener way using molecular oxygen as a terminal oxidant. This tandem transformation provides an efficient approach to construct various functionalized imidazo[1,5-a]quinazolin-5(4H)-ones in a straightforward manner via a sequential amination-oxidation-annulation-aromatisation.
February 19, 2018: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29457813/copper-catalyzed-synthesis-of-%C3%AE-amino-nitriles-through-methyl-transfer-from-dmf-to-aromatic-amines
#15
Zaifeng Yuan, Na Li, Chunyu Zhu, Chengfeng Xia
A copper-catalyzed activation of C(sp3 )-H bonds of DMF at room temperature was developed, which results in methyl transfer to aromatic amines for efficient synthesis of exceedingly valuable α-amino nitriles. This process features excellent functional group tolerance, a broad substrate scope, and high activity under ambient conditions.
February 19, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29457807/copper-i-and-silver-i-complexes-of-9-9-dimethyl-4-5-bis-di-tert-butylphosphino-xanthene-photophysical-properties-and-structural-rigidity-under-pressure
#16
Sarah Keller, Alessandro Prescimone, Edwin C Constable, Catherine E Housecroft
The heteroleptic complexes [Cu(tBu-xantphos)(bpy)][PF6 ] and [Ag(tBu-xantphos)(bpy)][PF6 ], where tBu-xantphos = 9,9-dimethyl-4,5-bis(di-tert-butylphosphino)xanthene and bpy = 2,2'-bipyridine have been synthesized and their photophysical properties investigated. Single crystal X-ray diffraction studies of the compounds under ambient and increased pressure are presented; increase in pressure results in little structural perturbation. For the copper(i) complexes, the effects of changing the N^N ligand from bpy to 6-methyl-2,2'-bipyridine (6-Mebpy), 6-bromo-2,2'-bipyridine (6-Brbpy), and 4,4'-di(tert-butyl)-2,2'-bipyridine (4,4'-tBu2 bpy) were also investigated...
February 19, 2018: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/29457784/hiv-latency-is-reversed-by-acss2-driven-histone-crotonylation
#17
Guochun Jiang, Don Nguyen, Nancie M Archin, Steven A Yukl, Gema Méndez-Lagares, Yuyang Tang, Maher M Elsheikh, George R Thompson, Dennis J Hartigan-O'Connor, David M Margolis, Joseph K Wong, Satya Dandekar
Eradication of HIV-1 (HIV) is hindered by stable viral reservoirs. Viral latency is epigenetically regulated. While the effects of histone acetylation and methylation at the HIV long-terminal repeat (LTR) have been described, our knowledge of the proviral epigenetic landscape is incomplete. We report that a previously unrecognized epigenetic modification of the HIV LTR, histone crotonylation, is a regulator of HIV latency. Reactivation of latent HIV was achieved following the induction of histone crotonylation through increased expression of the crotonyl-CoA-producing enzyme acyl-CoA synthetase short-chain family member 2 (ACSS2)...
February 19, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29457745/evaluation-of-mosquito-larvicidal-activity-of-fruit-extracts-of-acacia-auriculiformis-against-the-japanese-encephalitis-vector-culex-vishnui
#18
Mousumi Barik, Anjali Rawani, Subrata Laskar, Goutam Chandra
The larvicidal potentiality of crude and ethyl acetate extracts of fruits of Acacia auriculiformis was investigated against all the larval instars of JE vector Culex vishnui. The crude extracts showed good results against all the larval instars with highest mortality at 0.09%. Highest mortality was found at 300 ppm of ethyl acetate extract. Lowest LC50 value was obtained at 72 h for third instar larvae. Non target organisms tested, showed no to very less mortality to ethyl acetate solvent extract. Presence of N-H stretching, a C=O stretching, C=C and C-N stretching vibrations of secondary amide or amine group were confirmed from IR analysis...
February 19, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29457715/embedding-a-diketopyrrolopyrrole-based-crosslinking-interfacial-layer-enhances-the-performance-of-organic-photovoltaics
#19
Hsiang-Lin Hsu, Ying-Chieh Chao, Yu-Hua Liao, Chung-Lin Chung, Ya-Juan Peng, ChihPing Chen, Ru-Jong Jeng
In this study, we prepared DPPBTDA, a diketopyrrolopyrrole (DPP)-based small molecule presenting a terminal crosslinkable azido group, as a cathode modified layer for organic photovoltaics (OPVs) having the inverted device structure glass/indium tin oxide (ITO)/zinc oxide (ZnO) with or without interfacial layer (IFL)/active layer/MoO3/Ag. The active layer comprised a blend of poly[4,8-bis(5-(2-ethylhexyl)thien-2-yl)benzo[1,2-b;4,5-b´]dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene)-2-carboxylate-2,6-diyl] (PTB7-Th) as the electron donating moiety and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) as the electron acceptor...
February 19, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29457713/probing-structural-changes-among-analogous-inhibitor-bound-forms-of-hiv-1-protease-and-a-drug-resistant-mutant-in-solution-by-nuclear-magnetic-resonance
#20
Shahid N Khan, John D Persons, Janet L Paulsen, Michel Guerrero, Celia A Schiffer, Nese Kurt-Yilmaz, Rieko Ishima
In the era of state-of-the-art inhibitor design and high-resolution structural studies, detection of significant but small protein structural differences in the inhibitor-bound forms is critical to further developing the inhibitor. Here, we probed differences in HIV-1 protease (PR) conformation among darunavir and four analogous inhibitor-bound forms and compared them with a drug-resistant mutant using nuclear magnetic resonance chemical shifts. Changes in amide chemical shifts of wild-type (WT) PR among these inhibitor-bound forms, ΔCSP, were subtle but detectable and extended >10 Å from the inhibitor-binding site, asymmetrically between the two subunits of PR...
February 19, 2018: Biochemistry
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