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https://www.readbyqxmd.com/read/28811542/identification-replication-and-characterization-of-epigenetic-remodelling-in-the-aging-genome-a-cross-population-analysis
#1
Shuxia Li, Lene Christiansen, Kaare Christensen, Torben A Kruse, Paul Redmond, Riccardo E Marioni, Ian J Deary, Qihua Tan
Aging is a complex biological process regulated by multiple cellular pathways and molecular mechanisms including epigenetics. Using genome-wide DNA methylation data measured in a large collection of Scottish old individuals, we performed discovery association analysis to identify age-methylated CpGs and replicated them in two independent Danish cohorts. The double-replicated CpGs were characterized by distribution over gene regions and location in relation to CpG islands. The replicated CpGs were further characterized by involvement in biological pathways to study their functional implications in aging...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807729/cpg-demethylation-in-the-neurotoxicity-of-1-methyl-4-phenylpyridinium-might-mediate-transcriptional-up-regulation-of-%C3%AE-synuclein-in-sh-sy5y-cells
#2
Jian Yang, Zhaofei Yang, Xuan Wang, Min Sun, Yong Wang, Xiaomin Wang
The accumulation of α-synuclein is the primary pathological hallmark of Parkinson's disease (PD). In PD patients, CpG demethylation of intron-1 has been reported to be associated with α-synuclein up-regulation. Environmental factor, for example neurotoxin, is a major etiological risk factor in PD pathogenesis. However, the role of CpG methylation in neurotoxin-induced PD has not been addressed completely yet. To explore CpG methylation associating with α-synuclein transcription and its underlying mechanisms in the neurotoxin-induced PD pathology, human neuroblastoma SH-SY5Y cells were treated with neurotoxins 6-hydroxydopamine (6-OHDA) and 1-methyl-4-phenylpyridinium (MPP(+))...
August 11, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28807014/epigenetic-reprogramming-converts-human-wharton-s-jelly-mesenchymal-stem-cells-into-functional-cardiomyocytes-by-differential-regulation-of-wnt-mediators
#3
G Bhuvanalakshmi, Frank Arfuso, Alan Prem Kumar, Arun Dharmarajan, Sudha Warrier
BACKGROUND: Lineage commitment of mesenchymal stem cells (MSCs) to cardiac differentiation is controlled by transcription factors that are regulated by epigenetic events, mainly histone deacetylation and promoter DNA methylation. Here, we studied the differentiation of human Wharton's jelly MSCs (WJMSCs) into the cardiomyocyte lineage via epigenetic manipulations. METHODS: We introduced these changes using inhibitors of DNA methyl transferase and histone deacetylase, DC301, DC302, and DC303, in various combinations...
August 14, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28806569/metabolic-profiling-of-dehydrodiisoeugenol-using-xenobiotic-metabolomics
#4
Qian-Qian Lv, Xiao-Nan Yang, Dong-Mei Yan, Wei-Qing Liang, Hong-Ning Liu, Xiu-Wei Yang, Fei Li
Dehydrodiisoeugenol (DDIE), a representative and major benzofuran-type neolignan in Myristica fragrans Houtt., shows anti-inflammatory and anti-bacterial actions. In order to better understand its pharmacological properties, xenobiotic metabolomics was used to determine the metabolic map of DDIE and its influence on endogenous metabolites. Total thirteen metabolites of DDIE were identified through in vivo and in vitro metabolism, and seven of them were reported for the first time in the present study. The identity of DDIE metabolites was achieved by comparison of the MS/MS fragmentation pattern with DDIE using ultra-performance chromatography electrospray ionization quadrupole time-of-flight mass spectrometry (UPLC-ESI- QTOFMS)...
July 31, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28805483/tet1-mediated-dna-demethylation-involves-in-neuron-damage-induced-by-bilirubin-in-vitro
#5
Panhong Gou, Xiaoling Qi, Rui Yuan, Haojie Li, Xiaoling Gao, Junling Wang, Benzhong Zhang
The aim of this study is to identify the role of Tet1-mediated DNA demethylation in the neurotoxicity caused by unconjugated bilirubin (UCB) in vitro. Primary neuronal cells after cultured for 72 h were exposed to UCB (0-100 μmol/L) for 24 h. Following exposure to UCB cytotoxicity was determined with the methyl tetrazolium (MTT) assay, reactive oxygen species (ROS) and caspase-3 activity in neuron cells were measured with the corresponding assay kits. The expression of Tet1 and Klotho was determined with RT-PCR at mRNA level and western blot at protein level...
August 14, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28802234/paqr3-overexpression-suppresses-the-aggressive-phenotype-of-esophageal-squamous-cell-carcinoma-cells-via-inhibition-of-erk-signaling
#6
Ge Bai, Jianhu Chu, Mayinur Eli, Yongxing Bao, Hao Wen
Progestin and adipoQ receptor family member 3 (PAQR3) has exhibited anticancer activity in multiple malignancies. However, its expression and function in esophageal squamous cell carcinoma (ESCC) is still elusive. In this work, we examined the expression of PAQR3 in 40 surgically resected ESCC specimens and their adjacent normal tissues. The expression of PAQR3 in ESCC cell lines was measured after treatment with the demethylating agent 5-aza-2'-deoxycytidine (5-Aza-CdR). The effects of overexpression of PAQR3 on cell proliferation, colony formation, invasion, and tumorigenesis were investigated...
August 9, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28802167/induction-of-senescence-in-cancer-cells-by-5-aza-2-deoxycytidine-bioinformatics-and-experimental-insights-to-its-targets
#7
Jayarani F Putri, Nashi Widodo, Kazuichi Sakamoto, Sunil C Kaul, Renu Wadhwa
5'-Aza-2'-deoxycytidine (5-Aza-dC) is a demethylating drug that causes genome-wide hypomethylation resulting in the expression of several tumor suppressor genes causing growth arrest of cancer cells. Cancer is well established as a multifactorial disease and requires multi-module therapeutics. Search for new drugs and their approval by FDA takes a long time. Keeping this in view, research on new functions of FDA-approved anticancer drugs is desired to expand the list of multi-module functioning drugs for cancer therapy...
August 2, 2017: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/28802077/helicobacter-pylori-and-its-secreted-immunomodulator-vaca-protect-against-anaphylaxis-in-experimental-models-of-food-allergy
#8
Andreas Kyburz, Sabine Urban, Aleksandra Altobelli, Stefan Floess, Jochen Huehn, Timothy L Cover, Anne Müller
BACKGROUND: Food allergy is an increasingly common health problem in Western populations. Epidemiological studies have suggested both positive and negative associations between food allergy and infection with the gastric bacterium Helicobacter pylori. OBJECTIVE: The objective of this work was to investigate whether experimental infection with H. pylori, or prophylactic treatment with H. pylori-derived immunomodulatory molecules, affects the onset and severity of food allergy, either positively or negatively...
August 12, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28800922/inhibition-of-h3k4-demethylation-induces-autophagy-in-cancer-cell-lines
#9
Zhen Wang, Qiao-Yun Long, Lin Chen, Jia-Dong Fan, Zhao-Ning Wang, Lian-Yun Li, Min Wu
Epigenetic factors and related small molecules have emerged to be strongly involved in autophagy process. Here we report that 2-PCPA and GSK-LSD1, two inhibitors of histone H3K4 demethylase KDM1A/LSD1, induce autophagy in multiple mammalian cell lines. The two small molecules induce accumulation of LC3II, formation of autophagosome and autolysosome, and SQSTM1/p62 degradation. 2-PCPA treatment inhibits cell proliferation through cell cycle arrest but does not inducing cell death. Exogenous expression of KDM1A/LSD1 impaired the autophagic phenotypes triggered by 2-PCPA...
August 8, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28798687/tet2-protects-against-oxldl-induced-huvec-dysfunction-by-upregulating-the-cse-h2s-system
#10
Juan Peng, Zhi-Han Tang, Zhong Ren, Bei He, Yun Zeng, Lu-Shan Liu, Zuo Wang, Dang-Heng Wei, Xi-Long Zheng, Zhi-Sheng Jiang
Ten-eleven translocation-2 (TET2) protein is a DNA demethylase that regulates gene expression through DNA demethylation and also plays important roles in various diseases including atherosclerosis. Endothelial dysfunction represents an early key event in atherosclerotic disease. The cystathionine-γ-lyase (CSE)/hydrogen sulfide (H2S) is a key endogenous system with protective effects on endothelial functions. In this study, we examined how TET2 regulates oxidized low-density lipoprotein (oxLDL)-induced dysfunction of human umbilical vein endothelial cells (HUVECs) and determined the role of the CSE/H2S system...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28796162/the-variation-analysis-of-dna-methylation-in-wheat-carrying-gametocidal-chromosome-3c-from-aegilops-triuncialis
#11
Dan Wang, Jieyu Zhao, Yan Bai, You Ao, Changhong Guo
Gametocidal (Gc) chromosomes can ensure their preferential transmission by killing the gametes without themselves through causing chromosome breakage and therefore have been exploited as an effective tool for genetic breeding. However, to date very little is known about the molecular mechanism of Gc action. In this study, we used methylation-sensitive amplified polymorphism (MSAP) technique to assess the extent and pattern of cytosine methylation alterations at the whole genome level between two lines of wheat Gc addition line and their common wheat parent...
August 10, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28794029/coordinate-regulation-of-tet2-and-ebna2-control-dna-methylation-state-of-latent-epstein-barr-virus
#12
Fang Lu, Andreas Wiedmer, Kayla A Martin, Priyankara J M S Wickramasinghe, Andrew V Kossenkov, Paul M Lieberman
Epstein-Barr Virus (EBV) latency and its associated carcinogenesis are regulated by dynamic changes in DNA methylation of both virus and host genomes. We show here that the Ten-Eleven Translocation 2 (TET2) gene, implicated in hydroxymethylation and active DNA demethylation, is a key regulator of EBV latency type DNA methylation patterning. EBV latency types are defined by DNA methylation patterns that restrict expression of viral latency genes. We show that TET2 mRNA and protein expression correlate with the highly demethylated EBV type III latency program permissive for expression of EBNA2, EBNA3s, and LMP transcripts...
August 9, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28793175/identification-of-the-constituents-and-metabolites-in-rats-after-oral-administration-of-zi-shen-formula-by-uplc-q-tof-ms-combined-pattern-recognition-analysis
#13
Yanchao Zheng, Yidan Zhang, Shihan Geng, Mengxi Xu, Qingshen Yin, Lili Song, Pengwei Zhuang, Yanjun Zhang
An ultra high-performance liquid chromatography mass spectrometry method was established to detect and identify the chemical constituents of Zi Shen Formula (ZSF) and its metabolites in serum, urine and feces, after oral administration into rats. A total of 68 compounds were characterized in ZSF extracts. In vivo, 38 prototype components and 32 metabolites of ZSF were tentatively identified in rat serum, urine and feces. 7 metabolic pathways including demethylation, hydroxylation, oxidation, sulfation, glucuronidation, methylation, de-caffeoyl were proposed to involve in the generation of these metabolites...
August 9, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28792704/epigenetic-modification-of-microrna-205-and-its-association-with-glioblastoma-multiform
#14
Asghar Ghasemi, Soudabeh Fallah
BACKGROUND: Deregulated expressions of tumor-suppressive microRNAs (miRNAs) by epigenetic aberrations has a critical role in tumorigenesis. The aim of the present study was to investigate the epigenetic aberrations of miR205 and to understand how this modification may contribute to molecular events in glioblastoma multiform (GBM). METHODS: Quantitative RT-PCR and bisulfite genomic sequencing techniques were used to investigate gene expression and methylation levels of miR-205 in GBM tissues (n = 23), their matched adjacent normal tissues (n = 23) and glioblastoma U87MG cell line...
July 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28792100/understanding-sources-of-methylmercury-to-songbirds-with-stable-mercury-isotopes-challenges-and-future-directions
#15
Martin Tsz-Ki Tsui, Evan M Adams, Allyson K Jackson, David C Evers, Joel D Blum, Steven J Balogh
Mercury (Hg) stable isotope analysis is an emerging technique that has contributed to a better understanding of many aspects of the biogeochemical cycling of Hg in the environment. However, no study has yet evaluated its usefulness in elucidating the sources of methylmercury (MeHg) to songbird species, a common organism for biomonitoring of Hg in forested ecosystems. In this pilot study, we examined stable mercury isotope ratios in blood of four species of songbirds and the invertebrates they are likely foraging upon in multiple habitats in a small watershed of mixed forest and wetlands in Acadia National Park in Maine, U...
August 9, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28782102/retraction-genistein-mediated-histone-acetylation-and-demethylation-activates-tumor-suppressor-genes-in-prostate-cancer-cells-by-nobuyuki-kikuno-hiroaki-shiina-shinji-urakami-ken-kawamoto-hiroshi-hirata-yuichiro-tanaka-shahana-majid-mikio-igawa-and-rajvir-dahiya
#16
(no author information available yet)
The above article, published online on 22 April 2008 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors, the journal Editor in Chief, Prof. Peter Lichter, and John Wiley & Sons Ltd. The retraction has been agreed due to errors identified in Figs, 3, 4, and 5. The concerns about these figures cannot be resolved because the original data can no longer be retrieved. REFERENCE: Kikuno N, Shiina H, Urakami S, Kawamoto K, Hirata H, Tanaka Y, Majid S, Igawa M and Dahiya R...
October 1, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28778066/inhibition-of-lsd1-epigenetically-attenuates-oral-cancer-growth-and-metastasis
#17
Saqer F Alsaqer, Mustafa M Tashkandi, Vinay K Kartha, Ya-Ting Yang, Yazeed Alkheriji, Andrew Salama, Xaralabos Varelas, Maria Kukuruzinska, Stefano Monti, Manish V Bais
Lysine-specific demethylase 1 (LSD1) is a nuclear histone demethylase and a member of the amine oxidase (AO) family. LSD1 is a flavin-containing AO that specifically catalyzes the demethylation of mono- and di-methylated histone H3 lysine 4 through an FAD-dependent oxidative reaction. LSD1 is inappropriately upregulated in lung, liver, brain and esophageal cancers, where it promotes cancer initiation, progression, and metastasis. However, unlike other lysine-specific demethylases, the role and specific targets of LSD1 in oral squamous cell carcinoma (OSCC) pathogenesis remain unknown...
July 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28776669/hypomethylation-mediated-h19-overexpression-increases-the-risk-of-disease-evolution-through-the-association-with-bcr-abl-transcript-in-chronic-myeloid-leukemia
#18
Jing-Dong Zhou, Jiang Lin, Ting-Juan Zhang, Ji-Chun Ma, Xi-Xi Li, Xiang-Mei Wen, Hong Guo, Zi-Jun Xu, Zhao-Qun Deng, Wei Zhang, Jun Qian
Previous study has revealed that H19 expression is required for efficient tumor growth induced by BCR-ABL in chronic myeloid leukemia (CML). Herein, we further determined H19 expression and its clinical implication in patients with CML. H19 expression and methylation were detected by real-time quantitative PCR and real-time quantitative methylation-specific PCR, and then clinical implication of H19 expression was further analyzed. H19 expression was significantly up-regulated in CML patients (P < 0.001)...
August 4, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28776568/clinical-analysis-of-nsclc-patients-reveals-lack-of-association-between-egfr-mutation-and-tet1-downregulation
#19
J-I Lai, Y-C Lai, Y-C Chen, N-K Wang, J-N Pan, W-S Wang, S-C Chang
Lung cancer is one of the leading causes of death from cancer worldwide, with a poor prognosis in advanced cases. In the past decade, epidermal growth factor receptor (EGFR) inhibitors have shown significant efficacy towards treatment for EGFR mutant lung cancer. Expanding our knowledge of oncogenic EGFR signaling pathways is therefore of highly importance for the cancer field. Recently it has been proposed that mutant EGFR transcriptionally silences the TET1 (ten-eleven translocation methylcytosine dioxygenase 1) gene in cellular and animal models of lung cancer...
August 4, 2017: Cancer Gene Therapy
https://www.readbyqxmd.com/read/28776552/homocysteine-a-potential-common-route-for-cardiovascular-risk-and-dna-methylation-in-psoriasis
#20
REVIEW
Wen-Ming Wang, Hong-Zhong Jin
OBJECTIVE: Homocysteine is a sulfur-containing amino acid with potential clinical significance. Abnormal homocysteine levels have been found in patients with psoriasis. This review summarizes the possible correlations among homocysteine, cardiovascular risk, and DNA methylation in psoriasis. DATA SOURCES: We retrieved the articles published in English from the PubMed database up to January 2017, using the keywords including "psoriasis," "homocysteine," "cardiovascular risk," "DNA methylation," "methylenetetrahydrofolate reductase," "MTHFR," and "MTHFR C677T...
August 20, 2017: Chinese Medical Journal
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