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Methylation DNA

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https://www.readbyqxmd.com/read/28805547/the-association-between-methylation-levels-of-targeted-genes-and-albuminuria-in-patients-with-early-diabetic-kidney-disease
#1
Ozgur Aldemir, Faruk Turgut, Cumali Gokce
OBJECTIVE: The incidence of diabetes and its complications are greatly increasing world-wide. Diabeticnephropathy (DN) is the main cause of end-stage renal disease and is associated with high morbidity and mortality. It is important to predict patients with high risk for DN in the early stage. We selected the genes which have an important role on diabetic kidney disease. We aimed to investigate the association between DNA methylation levels of targeted genes and albuminuria in patients with early DN...
November 2017: Renal Failure
https://www.readbyqxmd.com/read/28805483/tet1-mediated-dna-demethylation-involves-in-neuron-damage-induced-by-bilirubin-in-vitro
#2
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/28804556/anti-tumor-efficacy-evaluation-of-a-novel-monoclonal-antibody-targeting-neutral-amino-acid-transporter-asct2-using-patient-derived-xenograft-mouse-models-of-gastric-cancer
#3
Noriyuki Kasai, Aya Sasakawa, Kenta Hosomi, Tze Wei Poh, Bernadette Lynn Chua, Wei Peng Yong, Jimmy So, Shing Leng Chan, Richie Soong, Koji Kono, Toshihiko Ishii, Kazuya Yamano
ASC amino acid transporter 2 (ASCT2), also known as solute linked carrier family 1 member A5 (SLC1A5) is a Na+-dependent glutamine/neutral amino acid transporter. ASCT2 acts as a high-affinity transporter of L-glutamine (Gln) and has been reported to be up-regulated in a variety of cancerous tissues including stomach, liver, and kidney. In this study, we evaluated anti-tumor efficacy of a novel anti-ASCT2 humanized monoclonal antibody, KM8094, which has a neutralizing activity against glutamine uptake, as a therapeutic antibody against gastric cancer and explored clinical predictive biomarker candidates by utilizing patient-derived xenograft (PDX) mouse models...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28803780/methylation-of-dna-ligase-1-by-g9a-glp-recruits-uhrf1-to-replicating-dna-and-regulates-dna-methylation
#4
Laure Ferry, Alexandra Fournier, Takeshi Tsusaka, Guillaume Adelmant, Tadahiro Shimazu, Shohei Matano, Olivier Kirsh, Rachel Amouroux, Naoshi Dohmae, Takehiro Suzuki, Guillaume J Filion, Wen Deng, Maud de Dieuleveult, Lauriane Fritsch, Srikanth Kudithipudi, Albert Jeltsch, Heinrich Leonhardt, Petra Hajkova, Jarrod A Marto, Kyohei Arita, Yoichi Shinkai, Pierre-Antoine Defossez
DNA methylation is an essential epigenetic mark in mammals that has to be re-established after each round of DNA replication. The protein UHRF1 is essential for this process; it has been proposed that the protein targets newly replicated DNA by cooperatively binding hemi-methylated DNA and H3K9me2/3, but this model leaves a number of questions unanswered. Here, we present evidence for a direct recruitment of UHRF1 by the replication machinery via DNA ligase 1 (LIG1). A histone H3K9-like mimic within LIG1 is methylated by G9a and GLP and, compared with H3K9me2/3, more avidly binds UHRF1...
August 4, 2017: Molecular Cell
https://www.readbyqxmd.com/read/28803494/prognostic-dna-methylation-markers-for-renal-cell-carcinoma-a-systematic-review
#5
Sophie C Joosten, Ivette Ag Deckers, Maureen J Aarts, Ann Hoeben, Joep G van Roermund, Kim M Smits, Veerle Melotte, Manon van Engeland, Vivianne C Tjan-Heijnen
AIM: Despite numerous published prognostic methylation markers for renal cell carcinoma (RCC), none of these have yet changed patient management. Our aim is to systematically review and evaluate the literature on prognostic DNA methylation markers for RCC. MATERIALS & METHODS: We conducted an exhaustive search of PubMed, EMBASE and MEDLINE up to April 2017 and identified 49 publications. Studies were reviewed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement, assessed for their reporting quality using the Reporting Recommendations for Tumor Marker Prognostic Studies (REMARK) criteria, and were graded to determine the level of evidence (LOE) for each biomarker...
August 14, 2017: Epigenomics
https://www.readbyqxmd.com/read/28803425/frameshift-mutations-in-repeat-sequences-of-ank3-hacd4-tcp10l-tp53bp1-mfn1-lcmt2-rnmt-trmt6-mettl8-and-mettl16-genes-in-colon-cancers
#6
Su Yeon Yeon, Yun Sol Jo, Eun Ji Choi, Min Sung Kim, Nam Jin Yoo, Sug Hyung Lee
Diminished ANK3 contributes to cell survival by inhibiting detachment-induced apoptosis. TP53BP1 that interacts with p53 and MFN1 that encodes a mitochondrial membrane protein are considered to have tumor suppressor gene (TSG) functions. HACD4 involving fatty acid synthesis and TCPL10 with transcription regulation functions are considered TSGs. Many genes involved in DNA methylations such as LCMT2, RNMT, TRMT6, METTL8 and METTL16 are often perturbed in cancer. The aim of our study was to find whether these genes were mutated in colorectal cancer (CRC)...
August 12, 2017: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/28802254/tdp1-is-critical-for-the-repair-of-dna-breaks-induced-by-sapacitabine-a-nucleoside-also-targeting-atm-and-brca-deficient-tumors
#7
Muthana Al Abo, Hiroyuki Sasanuma, Xiaojun Liu, Vinodh N Rajapakse, Shar-Yin N Huang, Evgeny Kiselev, Shunichi Takeda, William Plunkett, Yves Pommier
2'-C-cyano-2'-deoxy-1-β-D-arabino-pentofuranosylcytosine (CNDAC) is the active metabolite of the anticancer drug, sapacitabine. CNDAC is incorporated into the genome during DNA replication and subsequently undergoes beta-elimination that generates single-strand breaks with abnormal 3'-ends. Because tyrosyl-DNA phosphodiesterase 1 (TDP1) selectively hydrolyzes non-phosphorylated 3'-blocking ends, we tested its role in the repair of CNDAC-induced DNA damage. We show that cells lacking TDP1 (avian TDP1-/- DT40 cells and human TDP1 KO TSCER2 and HCT116 cells) exhibit marked hypersensitivity to CNDAC...
August 11, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28802229/tgf-%C3%AE-mediated-repression-of-mst1-by-dnmt1-promotes-glioma-malignancy
#8
Zhifei Guo, Guangyuan Li, Erbao Bian, Chun-Chun Ma, Jinghai Wan, Bing Zhao
Human gliomas are related to high rates of morbidity and mortality. TGF-β promotes the growth of glioma cells, and correlate with the degree of malignancy of human gliomas. However, the molecular mechanisms involved in the malignant function of TGF-β are not fully elucidated. Here, we showed that TGF-β induced the downregulation of MST1 expression in U87 and U251 glioma cells. Treatment of glioma cells with the DNA methylation inhibitor 5-aza-2'-deoxycytidine (5-AzadC) prevented the loss of MST1 expression...
August 9, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28802127/investigations-on-the-molecular-mode-of-action-of-the-novel-immunostimulator-zelnate-activation-of-the-cgas-sting-pathway-in-mammalian-cells
#9
Thomas Ilg
Bovine respiratory disease (BRD) is usually prevented or treated with vaccines and/or antibiotics. The use of antibiotics is, however, of concern due to the potential promotion of microbial resistance and the occurrence of residues. Recently an alternative aid in the treatment of BRD, the cationic lipid/bacterial plasmid DNA liposome-based immunomodulator ZelNate, has entered the veterinary market. In the present study, we provide data on the molecular mode of action of ZelNate. Despite the presence of numerous non-methylated CpG motifs in its plasmid DNA, ZelNate proved to be inactive on human and mouse toll-like receptor 9 (TLR9) in cell culture, in both recombinant and natural cellular receptor settings...
August 9, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28802077/helicobacter-pylori-and-its-secreted-immunomodulator-vaca-protect-against-anaphylaxis-in-experimental-models-of-food-allergy
#10
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/28802026/reversible-immune-abnormality-and-regulatory-t-cells-in-offspring-of-der-p-1-exposed-female-mice
#11
Lu Tan, Zezhang Tao, Yonggang Kong, Yu Xu
BACKGROUND: Maternal allergic diseases have an important influence on the origin of allergic rhinitis (AR) in offspring, but the mechanism and the duration of the maternal effect are unknown. Previous researches prompted the important roles of Tregs and Foxp3 DNA methylation in the development of allergic diseases. OBJECTIVE: To investigate the immune state and Tregs in the offspring of Der p 1-exposed female mice. METHOD: BALB/c female mice were exposed to Der p1 to construct the mouse AR model, then mated with normal male mice...
August 8, 2017: Asian Pacific Journal of Allergy and Immunology
https://www.readbyqxmd.com/read/28801915/manganese-and-1-methyl-4-phenylpyridinium-mpp-induced-neurotoxicity-indicate-differences-in-morphological-electrophysiological-and-genome-wide-alterations-implications-for-idiopathic-parkinson-s-disease
#12
Rajeswara Babu Mythri, Narayana Reddy Raghunath, Santosh Chandrakant Narwade, Mirazkar DasharathaRao Pandareesh, Kollarkandi Rajesh Sabitha, Mohamad Aiyaz, Bipin Chand, Manas Sule, Krittika Ghosh, Senthil Kumar, Bhagyalakshmi Shankarappa, Soundarya Soundararajan, Phalguni Anand Alladi, Meera Purushottam, Narayanappa Gayathri, Deepti Dileep Deobagkar, Thenkanidiyoor Rao Laxmi, Srinivas Bharath Muchukunte Mukunda
Idiopathic Parkinson's disease (iPD) and manganese-induced atypical Parkinsonism are characterized by movement disorder and nigrostriatal pathology. Although clinical features, brain region involved and responsiveness to levodopa distinguish both, differences at the neuronal level are largely unknown. We studied the morphological, neurophysiological and molecular differences in dopaminergic neurons exposed to the PD toxin 1-methyl-4-phenylpyridinium ion (MPP(+) ) and manganese (Mn) followed by validation in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) and Mn mouse models...
August 12, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28801683/regulation-of-tumour-related-genes-by-dynamic-epigenetic-alteration-at-enhancer-regions-in-gastric-epithelial-cells-infected-by-epstein-barr-virus
#13
Atsushi Okabe, Sayaka Funata, Keisuke Matsusaka, Hiroe Namba, Masaki Fukuyo, Bahityar Rahmutulla, Motohiko Oshima, Atsushi Iwama, Masashi Fukayama, Atsushi Kaneda
Epstein-Barr virus (EBV) infection is associated with tumours such as Burkitt lymphoma, nasopharyngeal carcinoma, and gastric cancer. We previously showed that EBV(+) gastric cancer presents an extremely high-methylation epigenotype and this aberrant DNA methylation causes silencing of multiple tumour suppressor genes. However, the mechanisms that drive EBV infection-mediated tumorigenesis, including other epigenomic alteration, remain unclear. We analysed epigenetic alterations induced by EBV infection especially at enhancer regions, to elucidate their contribution to tumorigenesis...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28801461/structural-basis-of-human-prdm9-allele-c-specific-recognition-of-its-cognate-dna-sequence
#14
Anamika Patel, Xing Zhang, Robert M Blumenthal, Xiaodong Cheng
PRDM9 is the only mammalian gene that has been associated with speciation. The PR/SET domain 9 (PRDM9) protein is a major determinant of meiotic recombination hotspots, and acts through sequence-specific DNA binding via its C2H2 zinc finger (ZF) tandem array, which is highly polymorphic within and between species. The most common human variant, PRDM9 allele A (PRDM9a), contains 13 fingers (ZF1-13). Allele C (PRDM9c) is the second-most common among African populations, and differs from PRDM9a by an arginine-to-serine change (R764S) in ZF9, and by replacement of ZF11 with two other fingers, yielding 14 fingers in PRDM9c...
August 11, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28801138/cadmium-exposure-in-newborn-rats-ovary-induces-developmental-disorders-of-primordial-follicles-and-the-differential-expression-of-scf-c-kit-gene
#15
Wenchang Zhang, Tingting Wu, Chenyun Zhang, Lingfeng Luo, Meimei Xie, Huiling Huang
Since the 1990s, the rising problem that gonad reproductive toxicity on adult female after exposing to cadmium (Cd), an environmental endocrine disruptor, has attracted high attention at home and abroad,and was systematically studied. Our research focuses on a further problem is that early cadmium exposure (during birth to before puberty) impact on development and function of ovarian cells and its possible mechanism. Our research focuses on the changes of ovarian cells growth and development after the newborn rat ovaries with cadmium exposure in vitro, and different expression of ovarian cells development-related factors, SCF/c-kit and changes of their DNA methylation status...
August 8, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28801067/dna-methylation-in-cho-cells
#16
Anna Wippermann, Thomas Noll
Chinese hamster ovary (CHO) cells account for the production of the majority of biopharmaceutical molecules - however, the molecular basis for their versatile properties is not entirely understood yet and the underlying cellular processes need to be characterized in detail. One such process that is supposed to contribute significantly to CHO cell phenotype is methylation of DNA at cytosine residues. DNA methylation was shown to be involved in several central biological processes in humans and to contribute to diseases like cancer...
August 8, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28800971/perkinsus-infection-is-associated-with-alterations-in-the-level-of-global-dna-methylation-of-gills-and-gastrointestinal-tract-of-the-oyster-crassostrea-gasar
#17
Natanael Dantas Farias, Naila Francis Paulo de Oliveira, Patricia Mirella da Silva
Bivalves are filter feeders that obtain food from seawater that may contain infectious agents, such as the protozoan parasites Perkinsus marinus and P. olseni that are associated with massive mortalities responsible for losses in the aquaculture industry. Despite all physical and chemical barriers, microorganisms cross epithelia and infect host tissues to cause pathologies. Epigenetics mechanisms play important roles in a variety of human processes, from embryonic development to cell differentiation and growth...
August 8, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28800870/recent-advances-in-her2-positive-breast-cancer-epigenetics-susceptibility-and-therapeutic-strategies
#18
REVIEW
Heena Singla, Abhilash Ludhiadch, Raman Preet Kaur, Harish Chander, Vinod Kumar, Anjana Munshi
HER2 amplification/overexpression accounts for aggressive clinical features of HER2 positive breast cancer. Epigenetic changes including DNA methylation, histone modifications and ncRNAs/miRNAs are associated with regulation of DNA chromatin and specifically, gene transcription. Hence, these produce eminent effects upon proto-oncogenes, tumor-suppressors and key cancer-regulatory signaling pathways. Understanding of epigenomic regulation of HER2 overexpression and signaling may help uncover the unmatchable physiology of HER2 gene/protein...
August 1, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28800752/a-type-i-combi-targeting-approach-for-the-design-of-molecules-with-enhanced-potency-against-brca1-2-mutant-and-o6-methylguanine-dna-methyltransferase-mgmt-expressing-tumour-cells
#19
Zhor Senhaji Mouhri, Elliot Goodfellow, Bertrand Jean-Claude
BACKGROUND: Mutations of the DNA repair proteins BRCA1/2 are synthetically lethal with the DNA repair enzyme poly(ADP-ribose) polymerase (PARP), which when inhibited, leads to cell death due to the absence of compensatory DNA repair mechanism. The potency of PARP inhibitors has now been clinically proven. However, disappointingly, acquired resistance mediated by the reactivation of wild type BRCA1/2 has been reported. In order to improve their efficacy, trials are ongoing to explore their combinations with temozolomide (TMZ)...
August 11, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28800456/synthesis-and-anticancer-properties-of-ruthenium-ii-complexes-as-potent-apoptosis-inducers-through-mitochondrial-disruption
#20
Dan Wan, Bing Tang, Yang-Jie Wang, Bo-Hong Guo, Hui Yin, Qiao-Yan Yi, Yun-Jun Liu
A new ligand MHPIP (MHPIP = 2-(1-methyl-1H-pyrazol-4-yl)-1H-imidazo[4,5-f][1,10]phenanthroline) and its three ruthenium (II) complexes [Ru(N-N)2(MHPIP)](ClO4)2 (N-N = phen: 1,10-phenanthroline 1; dmp = 2,9-dimethyl-1,10-phenanthroline 2; ttbpy = 4,4'-ditertiarybutyl-2,2'-bipyridine 3) were synthesized and characterized. The cytotoxic activity in vitro was studied by MTT method. The complexes 1-3 show moderate cytotoxic effects on the cell growth in HepG2 cells with an IC50 value of 25.5 ± 3.5, 35...
July 28, 2017: European Journal of Medicinal Chemistry
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