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Dna methylation

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https://www.readbyqxmd.com/read/29783144/analogous-modified-dna-probe-and-immune-competition-method-based-electrochemical-biosensor-for-rna-modification
#1
Tao Dai, Qinli Pu, Yongcan Guo, Chen Zuo, Shulian Bai, Yujun Yang, Dan Yin, Yi Li, Shangchun Sheng, Yiyi Tao, Jie Fang, Wen Yu, Guoming Xie
N6-methyladenosine (m6A), one of the most abundant RNA methylation which is ubiquitous in eukaryotic RNA, plays vital roles in many biological progresses. Therefore, the rapid and accurate quantitative detection of m6A is particularly important for its functional research. Herein, a label-free and highly selective electrochemical immunosensor was developed for the detection of m6A. The method is established on that the anti-m6A-Ab can recognize both m6A-RNA and m6A-DNA. An analogous modified DNA probe (L1) serves as a signal molecule, by competing with m6A-RNA for binding to Abs to broaden the linear range...
May 18, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29783122/bix-01294-promotes-the-differentiation-of-adipose-mesenchymal-stem-cells-into-adipocytes-and-neural-cells-in-arbas-cashmere-goats
#2
Qing Wang, Xiao Wang, Defang Lai, Jin Deng, Zhuang Hou, Hao Liang, Dongjun Liu
Chromatin remodeling plays an essential role in regulating gene transcription. BIX-01294 is a specific inhibitor of histone methyltransferase G9a, which is responsible for methylation of histone H3 lysine 9 (H3K9) that can also regulate DNA methylation and chromatin remodeling. The purpose of this study was to investigate the effects of BIX-01294 on the potential of goat adipose derived stem cells (gADSCs) to differentiate into adipocytes and neural cells. To accomplish this, BIX-01294 was used to treat gADSCs for 24 h, and the global level of DNA methylation as well as the expression of genes related to cell proliferation, apoptosis and pluripotency were detected...
May 14, 2018: Research in Veterinary Science
https://www.readbyqxmd.com/read/29782529/molecular-effect-of-an-optn-common-variant-associated-to-paget-s-disease-of-bone
#3
Iris A L Silva, Natércia Conceição, Édith Gagnon, Jacques P Brown, M Leonor Cancela, Laëtitia Michou
Paget's disease of bone (PDB) is a chronic bone disorder and although genetic factors appear to play an important role in its pathogenesis, to date PDB causing mutations were identified only in the Sequestosome 1 (SQSTM1) gene at the PDB3 locus. PDB6 locus, also previously linked to PDB, contains several candidate genes for metabolic bone diseases. We focused our analysis in the most significantly associated variant with PDB, within the Optineurin (OPTN) gene, i.e. the common variant rs1561570. Although it was previously shown to be strongly associated with PDB in several populations, its contribution to PDB pathogenesis remains unclear...
2018: PloS One
https://www.readbyqxmd.com/read/29782192/the-histone-deacetylase-inhibitor-ci994-improves-nuclear-reprogramming-and-in-vitro-developmental-potential-of-cloned-pig-embryos
#4
Long Jin, Qing Guo, Guang-Lei Zhang, Xiao-Xu Xing, Mei-Fu Xuan, Qi-Rong Luo, Zhao-Bo Luo, Jun-Xia Wang, Xi-Jun Yin, Jin-Dan Kang
Epigenetic reprogramming and somatic cell nuclear transfer (SCNT) cloning efficiency were recently enhanced using histone deacetylase inhibitors (HDACis). In this study, we investigated the time effect of CI994, an HDACi, on the blastocyst formation rate, acetylation levels of H3K9 and H4K12, DNA methylation levels of anti-5-methylcytosine (5mC), and some mRNA expression of pluripotency-related genes in pig SCNT embryos. Treatment with 10 μM CI994 for 24 hours significantly improved the blastocyst formation rate of SCNT embryos in comparison with the untreated group (p < 0...
May 21, 2018: Cellular Reprogramming
https://www.readbyqxmd.com/read/29782187/effects-of-maternal-vitamin-d-supplementation-on-the-maternal-and-infant-epigenome
#5
Cindy M Anderson, Shannon L Gillespie, Doria K Thiele, Jody L Ralph, Joyce E Ohm
INTRODUCTION: Mothers and infants are at high risk for inadequate vitamin D status. Mechanisms by which vitamin D may affect maternal and infant DNA methylation are poorly understood. OBJECTIVE: This study quantified the effects of vitamin D3 supplementation on DNA methylation in pregnant and lactating women and their breastfed infants. MATERIALS AND METHODS: In this randomized controlled pilot study, pregnant women received vitamin D3 400 international units (IU) (n = 6; control) or 3,800 IU (n = 7; intervention) daily from late second trimester through 4-6 weeks postpartum...
May 21, 2018: Breastfeeding Medicine: the Official Journal of the Academy of Breastfeeding Medicine
https://www.readbyqxmd.com/read/29781947/childhood-trauma-dna-methylation-of-stress-related-genes-and-depression-findings-from-two-monozygotic-twin-studies
#6
Hao Peng, Yun Zhu, Eric Strachan, Emily Fowler, Tamara Bacus, Peter Roy-Byrne, Jack Goldberg, Viola Vaccarino, Jinying Zhao
OBJECTIVE: DNA methylation has been associated with both early life stress and depression. This study examined the combined association of DNA methylation at multiple CpG probes in five stress-related genes with depressive symptoms, and tested whether these genes methylation mediated the association between childhood trauma and depression in two monozygotic (MZ) twin studies. METHODS: The current analysis comprised 119 MZ twin pairs (84 male pairs [mean 55 years], and 35 female pairs [mean 36 years])...
May 17, 2018: Psychosomatic Medicine
https://www.readbyqxmd.com/read/29780815/endometriosis-malignant-transformation-epigenetics-as-a-probable-mechanism-in-ovarian-tumorigenesis
#7
REVIEW
Jiaxing He, Weiqin Chang, Chunyang Feng, Manhua Cui, Tianmin Xu
Endometriosis, defined as the presence of ectopic endometrial glands and stroma outside the uterine cavity, is a chronic, hormone-dependent gynecologic disease affecting millions of women across the world, with symptoms including chronic pelvic pain, dysmenorrhea, dyspareunia, dysuria, and subfertility. In addition, there is well-established evidence that, although endometriosis is considered benign, it is associated with an increased risk of malignant transformation, with the involvement of various mechanisms of development...
2018: International Journal of Genomics
https://www.readbyqxmd.com/read/29779659/preparation-assay-and-application-of-chlorinase-sall-for-the-chemoenzymatic-synthesis-of-s-adenosyl-l-methionine-and-analogs
#8
Tony D Davis, Sylvia Kunakom, Michael D Burkart, Alessandra S Eustaquio
S-adenosyl-l-methionine (SAM) is universal in biology, serving as the second most common cofactor in a variety of enzymatic reactions. One of the main roles of SAM is the methylation of nucleic acids, proteins, and metabolites. Methylation often imparts regulatory control to DNA and proteins, and leads to an increase in the activity of specialized metabolites such as those developed as pharmaceuticals. There has been increased interest in using SAM analogs in methyltransferase-catalyzed modification of biomolecules...
2018: Methods in Enzymology
https://www.readbyqxmd.com/read/29779209/gata3-hypermethylation-and-foxp3-hypomethylation-are-associated-with-sustained-protection-and-bystander-effect-following-epicutaneous-immunotherapy-in-peanut-sensitized-mice
#9
Lucie Mondoulet, Vincent Dioszeghy, Florence Busato, Camille Plaquet, Véronique Dhelft, Kevin Bethune, Laurence Leclere, Christian Daviaud, Mélanie Ligouis, Hugh Sampson, Christophe Dupont, Jörg Tost
BACKGROUND: Epicutaneous immunotherapy (EPIT) is a promising method for treating food allergies. In animal models, EPIT induces sustained unresponsiveness and prevents further sensitization mediated by Tregs. Here, we elucidate the mechanisms underlying the therapeutic effect of EPIT, by characterizing the kinetics of DNA methylation changes in sorted cells from spleen and blood and by evaluating its persistence and bystander effect compared to oral immunotherapy (OIT). METHODS: BALB/c mice orally sensitized to peanut proteins (PPE) were treated by EPIT using a PPE-patch or by PPE-OIT...
May 19, 2018: Allergy
https://www.readbyqxmd.com/read/29778234/egfl7-and-rassf1-promoter-hypermethylation-in-epithelial-ovarian-cancer
#10
Yanisa Rattanapan, Veerawat Korkiatsakul, Adcharee Kongruang, Takol Chareonsirisuthigul, Budsaba Rerkamnuaychoke, Anna Wongkularb, Sarikapan Wilailak
DNA methylation is one of the epigenetic mechanisms associated with gene expression and plays a key role as in activation and deactivation of oncogenes and tumor suppressor genes, respectively. This study employed DNA methylation array to identify methylated genes which are highly correlated with various phenotypes of epithelial ovarian cancer (EOC) in Thai patients and to quantify promoter CpG-island methylation of candidate genes. Tissues from patients with serous and non-serous EOC showed significantly higher promoter methylation of EGFL7 and RASSF1 compared to benign cases...
August 2018: Cancer Genetics
https://www.readbyqxmd.com/read/29778228/the-highly-heterogeneous-methylated-genomes-and-diverse-restriction-modification-systems-of-bloom-forming-microcystis
#11
Liang Zhao, Yulong Song, Lin Li, Nanqin Gan, Jerry J Brand, Lirong Song
The occurrence of harmful Microcystis blooms is increasing in frequency in a myriad of freshwater ecosystems. Despite considerable research pertaining to the cause and nature of these blooms, the molecular mechanisms behind the cosmopolitan distribution and phenotypic diversity in Microcystis are still unclear. We compared the patterns and extent of DNA methylation in three strains of Microcystis, PCC 7806SL, NIES-2549 and FACHB-1757, using Single Molecule Real-Time (SMRT) sequencing technology. Intact restriction-modification (R-M) systems were identified from the genomes of these strains, and from two previously sequenced strains of Microcystis, NIES-843 and TAIHU98...
May 2018: Harmful Algae
https://www.readbyqxmd.com/read/29777793/homocysteine-induces-vascular-inflammatory-response-via-smad7-hypermethylation-in-human-umbilical-vein-smooth-muscle-cells
#12
Li-Hua Wei, Nai-Xia Chao, Si Gao, Ya-Ting Yu, Lin Shi, Xin-Bo Ma, Na Liao, Ke Lan, Yu Luo, Zheng-Yi Xie, Yuan-Yuan Li
Homocysteine (Hcy) can induce atherosclerosis through the inflammatory response and DNA methylation disorder. Our recent study has reported a novel epigenetic modified gene related to atherosclerosis -SMAD7. To further understand the pathogenesis of atherosclerosis, the current study was designed to investigate an inflammatory role of Hcy in human umbilical vein smooth muscle cells (HUVSMCs) through interfering with SMAD7 methylation. Using MALDI-TOF MS, we found that Hcy increased DNA methylation levels of SMAD7 promoter in a dose and time-dependent manner in HUVSMCs...
May 16, 2018: Microvascular Research
https://www.readbyqxmd.com/read/29777398/the-role-of-dna-methylation-in-renal-cell-carcinoma
#13
REVIEW
Brittany N Lasseigne, James D Brooks
Renal cell carcinoma (RCC) is the most common kidney cancer and includes several molecular and histological subtypes with different clinical characteristics. While survival rates are high if RCC is diagnosed when still confined to the kidney and treated definitively, there are no specific diagnostic screening tests available and symptoms are rare in early stages of the disease. Management of advanced RCC has changed significantly with the advent of targeted therapies, yet survival is usually increased by months due to acquired resistance to these therapies...
May 18, 2018: Molecular Diagnosis & Therapy
https://www.readbyqxmd.com/read/29777275/overexpression-of-abcb4-contributes-to-acquired-doxorubicin-resistance-in-breast-cancer-cells-in-vitro
#14
Jia-Feng Huang, Chun-Jie Wen, Guo-Zhi Zhao, Yi Dai, Ying Li, Lan-Xiang Wu, Hong-Hao Zhou
PURPOSE: Doxorubicin is one of the most active agents in the first-line therapy for metastatic breast cancer, but its utility is partially limited by the frequent emergence of doxorubicin resistance. In this study, we aimed to investigate the role of ATP-binding cassette sub-family B, member 4 (ABCB4) in acquired doxorubicin resistance in breast cancer cells, as well as its potential mechanism. METHODS: In doxorubicin-sensitive and -resistant breast cancer cell lines MCF-7 and MDA-MB-231, the expression levels of ABCB4 were detected using real-time quantitative PCR and Western blot analysis, the DNA methylation and histone acetylation status of ABCB4 gene were investigated by bisulfite-sequencing PCR (BSP) and chromatin immunoprecipitation (ChIP) assays, and the doxorubicin sensitivity and intracellular doxorubicin accumulation were observed using cell cytotoxicity assay and flow cytometry...
May 18, 2018: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/29777263/folate-treatment-of-pregnant-rat-dams-abolishes-metabolic-effects-in-female-offspring-induced-by-a-paternal-pre-conception-unhealthy-diet
#15
Jian Li, Yong-Ping Lu, Oleg Tsuprykov, Ahmed A Hasan, Christoph Reichetzeder, Mei Tian, Xiao Li Zhang, Qin Zhang, Guo-Ying Sun, Jingli Guo, Mohamed M S Gaballa, Xiao-Ning Peng, Ge Lin, Berthold Hocher
AIMS/HYPOTHESIS: Paternal high-fat diet prior to mating programmes impaired glucose tolerance in female offspring. We examined whether the metabolic consequences in offspring could be abolished by folate treatment of either the male rats before mating or the corresponding female rats during pregnancy. METHODS: Male F0 rats were fed either control diet or high-fat, high-sucrose and high-salt diet (HFSSD), with or without folate, before mating. Male rats were mated with control-diet-fed dams...
May 18, 2018: Diabetologia
https://www.readbyqxmd.com/read/29777239/inference-about-causation-between-body-mass-index-and-dna-methylation-in-blood-from-a-twin-family-study
#16
Shuai Li, Ee Ming Wong, Minh Bui, Tuong L Nguyen, Ji-Hoon Eric Joo, Jennifer Stone, Gillian S Dite, Pierre-Antoine Dugué, Roger L Milne, Graham G Giles, Richard Saffery, Melissa C Southey, John L Hopper
BACKGROUND: Several studies have reported DNA methylation in blood to be associated with body mass index (BMI), but few have investigated causal aspects of the association. We used a twin family design to assess this association at two life points and applied a novel analytical approach to appraise the evidence for causality. METHODS: The methylation profile of DNA from peripheral blood was measured for 479 Australian women from 130 twin families. Linear regression was used to estimate the associations of DNA methylation at ~410,000 cytosine-guanine dinucleotides (CpGs), and of the average DNA methylation at ~20,000 genes, with current BMI, BMI at age 18-21 years, and the change between the two (BMI change)...
May 17, 2018: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29777237/dna-methylation-variant-b-vitamins-intake-and-longitudinal-change-in-body-mass-index
#17
Xiang Li, Tiange Wang, Min Zhao, Tao Huang, Dianjianyi Sun, Liyuan Han, Hoirun Nisa, Xiaoyun Shang, Yoriko Heianza, Lu Qi
BACKGROUND: Growing evidence has implicated DNA methylation (DNAm) in the regulation of body adiposity; a recent epigenome-wide association study (EWAS) identified a genetic variant determining DNAm at the SREBF1 gene that affected body mass index (BMI). OBJECTIVE: In the present study, we tested interactions between DNAm variant rs752579 and methylation metabolism-related B-vitamins (folate, vitamin B2 , vitamin B6 , and vitamin B12 ) on longitudinal change in BMI in the Women's Health Initiative Memory Study (WHIMS)...
May 17, 2018: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29777171/mll-fusion-driven-leukemia-requires-setd2-to-safeguard-genomic-integrity
#18
Anna Skucha, Jessica Ebner, Johannes Schmöllerl, Mareike Roth, Thomas Eder, Adrián César-Razquin, Alexey Stukalov, Sarah Vittori, Matthias Muhar, Bin Lu, Martin Aichinger, Julian Jude, André C Müller, Balázs Győrffy, Christopher R Vakoc, Peter Valent, Keiryn L Bennett, Johannes Zuber, Giulio Superti-Furga, Florian Grebien
MLL-fusions represent a large group of leukemia drivers, whose diversity originates from the vast molecular heterogeneity of C-terminal fusion partners of MLL. While studies of selected MLL-fusions have revealed critical molecular pathways, unifying mechanisms across all MLL-fusions remain poorly understood. We present the first comprehensive survey of protein-protein interactions of seven distantly related MLL-fusion proteins. Functional investigation of 128 conserved MLL-fusion-interactors identifies a specific role for the lysine methyltransferase SETD2 in MLL-leukemia...
May 18, 2018: Nature Communications
https://www.readbyqxmd.com/read/29777097/gwas-on-family-history-of-alzheimer-s-disease
#19
Riccardo E Marioni, Sarah E Harris, Qian Zhang, Allan F McRae, Saskia P Hagenaars, W David Hill, Gail Davies, Craig W Ritchie, Catharine R Gale, John M Starr, Alison M Goate, David J Porteous, Jian Yang, Kathryn L Evans, Ian J Deary, Naomi R Wray, Peter M Visscher
Alzheimer's disease (AD) is a public health priority for the 21st century. Risk reduction currently revolves around lifestyle changes with much research trying to elucidate the biological underpinnings. We show that self-report of parental history of Alzheimer's dementia for case ascertainment in a genome-wide association study of 314,278 participants from UK Biobank (27,696 maternal cases, 14,338 paternal cases) is a valid proxy for an AD genetic study. After meta-analysing with published consortium data (n = 74,046 with 25,580 cases across the discovery and replication analyses), three new AD-associated loci (P < 5 × 10-8 ) are identified...
May 18, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29776994/first-demonstration-of-olfactory-learning-and-long-term-memory-in-honey-bee-queens
#20
Zhiwen Gong, Ken Tan, James C Nieh
As the primary source of colony reproduction, social insect queens play a vital role. However, the cognitive abilities of queens are not well understood, although queen learning and memory are essential in multiple species such as honey bees, in which virgin queens must leave the nest and then successful learn to navigate back over repeated nuptial flights. Honey bee queen learning has never been previously demonstrated. We therefore tested olfactory learning in queens and workers and examined the role of DNA methylation, which plays a key role in long term memory formation...
May 18, 2018: Journal of Experimental Biology
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