keyword
MENU ▼
Read by QxMD icon Read
search

DNMT3B

keyword
https://www.readbyqxmd.com/read/29228451/rg108-induces-the-apoptosis-of-endometrial-cancer-ishikawa-cell-lines-by-inhibiting-the-expression-of-dnmt3b-and-demethylation-of-hmlh1
#1
L Yang, J Hou, X-H Cui, L-N Suo, Y-W Lv
OBJECTIVE: The effects of DNA methyltransferase (DNMT) inhibitor RG108 on the proliferation and apoptosis of endometrial cancer was investigated, and whether its mechanism was related to the inhibition of DNMT3B, thereby affecting the human mutL homolog 1 (hMLH1) methylation status and its expression, was further studied. MATERIALS AND METHODS: Culture of human endometrial cancer Ishikawa cell lines: cells grew adhering to the wall in Roswell Park Memorial Institute-1640 (RPMI-1640) medium (supplemented with 10% fetal bovine serum (FBS) and 2 mM L-glutamic acid)...
November 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29223407/stat3-mediated-epigenetic-silencing-of-foxp3-in-lada-t-cells-is-regulated-through-hdac5-and-dnmt1
#2
Can Hou, Yanjun Zhong, Zhen Wang, Zhao Ming, Gan Huang, Lin Ouyang, Yijun Li, Qianjin Lu, Zhiguang Zhou
In LADA patients, Tregs are reduced and FOXP3 is downregulated in CD4+ T cells, but the etiology remains unclear. Our study included in 20 LADA patients and 20 healthy control patients. qRT-PCR results showed that STAT3, HDAC3, HDAC5, SIRT1, DNMT1 and DNMT3b mRNAs were significantly upregulated in LADA CD4+ T cells than controls, while FOXP3 mRNA significantly decreased. p-STAT3, STAT3, DNMT1 and DNMT3b expressions were increased demonstrated by western blot. ChIP-PCR suggested that p-STAT3 binds to the Foxp3 promoter, meanwhile, histone H3 acetylation at K9 and K14 of FOXP3 promoter were significantly lower than controls...
December 6, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/29207141/downregulation-of-mir%C3%A2-29b-targets-dnmt3b-to-suppress-cellular-apoptosis-and-enhance-proliferation-in-pancreatic-cancer
#3
Li-Hua Wang, Ju Huang, Cheng-Rong Wu, Liu-Ye Huang, Jun Cui, Zhi-Zhi Xing, Chun-Yu Zhao
As one of the most aggressive types of tumor, pancreatic cancer is a principal cause of tumor‑associated mortality. Negative associations between microRNA‑29 (miR‑29) and DNA methyltransferases (DNMT) 3a and 3b have been demonstrated to be associated with the carcinogenesis of a number of types of cancer; however, this has not been completely elucidated in pancreatic cancer. In the present study, pancreatic cancer tissues (n=15) and corresponding paracancerous tissues (n=15) were obtained and the results of reverse transcription‑quantitative polymerase chain reaction analysis indicated decreased expression of miR‑29b and enhanced mRNA expression of DNMT3b in pancreatic cancer tissues, compared with the corresponding paracancerous tissues...
November 23, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29203910/tet-proteins-safeguard-bivalent-promoters-from-de-novo-methylation-in-human-embryonic-stem-cells
#4
Nipun Verma, Heng Pan, Louis C Doré, Abhijit Shukla, Qing V Li, Bobbie Pelham-Webb, Virginia Teijeiro, Federico González, Andrei Krivtsov, Chan-Jung Chang, Eirini P Papapetrou, Chuan He, Olivier Elemento, Danwei Huangfu
TET enzymes oxidize 5-methylcytosine (5mC) to 5-hydroxymethylcytosine (5hmC), which can lead to DNA demethylation. However, direct connections between TET-mediated DNA demethylation and transcriptional output are difficult to establish owing to challenges in distinguishing global versus locus-specific effects. Here we show that TET1, TET2 and TET3 triple-knockout (TKO) human embryonic stem cells (hESCs) exhibit prominent bivalent promoter hypermethylation without an overall corresponding decrease in gene expression in the undifferentiated state...
December 4, 2017: Nature Genetics
https://www.readbyqxmd.com/read/29164502/superovulation-alters-dna-methyltransferase-protein-expression-in-mouse-oocytes-and-early-embryos
#5
Fatma Uysal, Saffet Ozturk, Gokhan Akkoyunlu
PURPOSE: DNA methylation is an epigenetic mechanism that plays critical roles during mammalian oocyte and preimplantation embryo development. It is achieved by adding a methyl group to the fifth carbon atom of cytosine residues within cytosine-phosphate-guanine (CpG) and non-CpG dinucleotide sites using DNA methyltransferase (DNMT) enzymes for de novo and maintenance methylation processes. DNMT1, DNMT3A, and DNMT3B play important roles in establishing methylation of developmentally related genes in oocytes and early embryos...
November 22, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/29156743/hepatitis-c-virus-core-overcomes-all-trans-retinoic-acid-induced-apoptosis-in-human-hepatoma-cells-by-inhibiting-p14-expression-via-dna-methylation
#6
Juri Kwak, Jung-Hye Choi, Kyung Lib Jang
All-trans retinoic acid (ATRA), the most biologically active metabolite of vitamin A, is known to induce p14 expression via promoter hypomethylation to activate the p14-MDM2-p53 pathway, which leads to activation of the p53-dependent apoptotic pathway and subsequent induction of apoptosis in human hepatoma cells. In the present study, we found that hepatitis C virus (HCV) Core derived from ectopic expression or HCV infection overcomes ATRA-induced apoptosis in p53-positive hepatoma cells. For this effect, HCV Core upregulated both protein levels and enzyme activities of DNA methyltransferase 1 (DNMT1), DNMT3a, and DNMT3b and thereby repressed p14 expression via promoter hypermethylation, resulting in inactivation of the pathway leading to p53 accumulation in the presence of ATRA...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137219/functional-characterization-of-lysine-specific-demethylase-2-lsd2-kdm1b-in-breast-cancer-progression
#7
Lin Chen, Shauna N Vasilatos, Ye Qin, Tiffany A Katz, Chunyu Cao, Hao Wu, Nilgun Tasdemir, Kevin M Levine, Steffi Oesterreich, Nancy E Davidson, Yi Huang
Flavin-dependent histone demethylases govern histone H3K4 methylation and act as important chromatin modulators that are extensively involved in regulation of DNA replication, gene transcription, DNA repair, and heterochromatin gene silencing. While the activities of lysine-specific demethylase 1 (LSD1/KDM1A) in facilitating breast cancer progression have been well characterized, the roles of its homolog LSD2 (KDM1B) in breast oncogenesis are relatively less understood. In this study, we showed that LSD2 protein level was significantly elevated in malignant breast cell lines compared with normal breast epithelial cell line...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29100357/dnmt3b-overexpression-contributes-to-aberrant-dna-methylation-and-myc-driven-tumor-maintenance-in-t-all-and-burkitt-s-lymphoma
#8
Candace J Poole, Wenli Zheng, Atul Lodh, Aleksey Yevtodiyenko, Daniel Liefwalker, Honglin Li, Dean W Felsher, Jan van Riggelen
Aberrant DNA methylation is a hallmark of cancer. However, our understanding of how tumor cell-specific DNA methylation patterns are established and maintained is limited. Here, we report that in T-cell acute lymphoblastic leukemia (T-ALL) and Burkitt's lymphoma the MYC oncogene causes overexpression of DNA methyltransferase (DNMT) 1 and 3B, which contributes to tumor maintenance. By utilizing a tetracycline-regulated MYC transgene in a mouse T-ALL (EμSRα-tTA;tet-o-MYC) and human Burkitt's lymphoma (P493-6) model, we demonstrated that DNMT1 and DNMT3B expression depend on high MYC levels, and that their transcription decreased upon MYC-inactivation...
September 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/29095264/effects-of-age-and-sex-on-epigenetic-modification-induced-by-an-acute-physical-exercise
#9
Marinella Coco, Vincenzo Perciavalle, Paolo Cavallari, Francesco Bolzoni, Adriana Carol Eleonora Graziano, Valentina Perciavalle
It has been observed that, after 2 hours of aerobic exercise, plasma interleukin-6 (IL-6) increases whereas nuclear concentrations of enzyme DNA methyltransferase (DNMT) 3B significantly decreased in peripheral blood mononuclear cells (PBMCs), with no change observed in DNMT3A. The aim of the present study was to detect differences in these changes induced by exercise in plasma IL-6 levels as well as in PBMC nuclear concentrations of DNMT3A and DNMT3B, in relation to age and sex. Four groups were studied: 12 young men (24...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29074164/defective-regulation-of-l1-endogenous-retroelements-in-primary-sjogren-s-syndrome-and-systemic-lupus-erythematosus-role-of-methylating-enzymes
#10
Clio P Mavragani, Adrianos Nezos, Irina Sagalovskiy, Surya Seshan, Kyriakos A Kirou, Mary K Crow
OBJECTIVE: To investigate whether altered DNA methylation contributes to the inappropriate expression of LINE-1 (L1) retroelements in primary Sjogren's syndrome (SS) and systemic lupus erythematosus (SLE). METHODS: Minor salivary glands (MSG) were obtained from 42 patients with primary SS [23 without adverse predictors for lymphoma development (SS-low risk), 7 SS-high risk and 12 complicated by B-cell lymphoma (SS-lymphoma)] and 17 sicca controls (SC). Additionally, kidney biopsy specimens and PBMCs were obtained from 23 and 73 lupus patients, respectively...
October 23, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/29072397/the-dna-methyltransferase-3b-149-genetic-polymorphism-modulates-lung-cancer-risk-from-smoking
#11
Chung Yu Lai, Chia Chen Huang, Chin Hung Tsai, Jiun Yao Wang, Chih Ling Kerr, Yi Yu Chen, Yan Wei Cai, Ruey Hong Wong
Background: Smoking can cause increase of DNA methylation and hypermethylation of tumor suppressor genes, this possible contributing to subsequent lung cancer development. DNA methyltransferase 3B (DNMT3B) is crucial in regulation of DNA methylation and it has been proposed that green tea might lower cancer risk through inhibiting its activity. Here, we designed a case-control study to investigate whether the DNMT3B -149 genetic polymorphism could modulate lung cancer risk due to smoking. Possible interactions of smoking and green tea consumption with this DNMT3B genetic polymorphism were also assessed...
October 26, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/29070120/-expression-of-dnmt3b-gene-in-myeloma-rpmi-8226-cells-and-its-biological-significance
#12
Xiao-Ning Wang, Jian-Na Yao, Xiao-Juan Wang, Chun-Hong Sun, Cai-Li Guo, Ying Chen, Peng-Cheng He, Mei Zhang
OBJECTIVE: To study the expression of DNMT3b gene in myeloma RPMI8226 cells and its biological significance. METHODS: The activity of DNA methyltransferase was detected by ELISA, and the expression of DNMT3b in RPMI8226 cells was analyzed by semi-quantitative RT-PCR and real-time fluorescent quantitative PCR. The proliferation and expression of DNMT3b gene in RPMI8226 cells intervened with capecitabine for 24 hours were detected. RESULTS: The activity of DNMT and expression of DNMT3b in RPMI 8226 cells increased...
October 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/29069387/functional-role-of-dna-methylation-at-the-flo1-promoter-in-budding-yeast
#13
Kei-Ichi Sugiyama, Hiroko Furusawa, Petr Grúz, Masamitsu Honma
We have previously reported that the transformation of the budding yeast with plasmids encoding the human DNA methyltransferases DNMT1 and DNMT3B cDNAs induce the mRNA of flocculin gene FLO1 and the flocculation phenotype. In the present study, we evaluated the effect of DNMT inhibitor in the transformed yeasts using a FLO1 promoter-based green fluorescent protein (GFP) reporter gene assay. The DNMT inhibitor, 5-aza-2'-deoxycytidine (5AZ), decreased GFP fluorescence driven by FLO1 promoter in DNMT -genes transformed yeast ( DNMT yeast)...
October 24, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/29058487/lc3-dependent-autophagy-in-pig-2-cell-cloned-embryos-could-influence-the-degradation-of-maternal-mrna-and-the-regulation-of-epigenetic-modification
#14
Daming Chi, Yaqiong Zeng, Mingzhu Xu, Linan Si, Xiao Qu, Honglin Liu, Juan Li
In this study, the distribution as well as the effect of autophagy on reprogramming in pig cloned embryos were observed immediately after somatic cell nuclear transfer. Results showed that the LC3 was at the highest level in cloned embryos at 2-cell stage, and it decreased with the development from 2-cell stage to blastocyst. Different to cloned embryos, the intensity of LC3 in parthenogenetic activation (PA) embryos was at the highest level at 4-cell stage. A markedly higher level of Bmp15, H1foo, and Dppa3 was shown in cloned embryos at 2-cell stage (p < 0...
October 23, 2017: Cellular Reprogramming
https://www.readbyqxmd.com/read/29048642/the-epigenetic-effect-of-microrna-in-bcr-abl1%C3%A2-positive-microvesicles-during-the-transformation-of-normal-hematopoietic-transplants
#15
Na Shen, Lin Jiang, Qing Li, Jieke Cui, Shu Zhou, Fanjun Cheng, Zhaodong Zhong, Li Meng, Yong You, Xiaojian Zhu, Ping Zou
Epigenetics have been demonstrated to play a pivotal role in the progression of multiple cancers. Our previous study has demonstrated that microvesicles (MVs) derived from K562 cells could malignantly transform normal hematopoietic cells. The aim of this section was to elucidate the epigenetic effects of RNA in K562-MVs. We altered some epigenetic RNAs (miR-106a-5p, miR-106b-5p and lincPOU3F3) in K562-MVs and followed the process of transformation. Global DNA methylation and DNA methyltransferase (DNMT) levels were observed respectively...
September 19, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29033456/the-dna-methyltransferase-family-a-versatile-toolkit-for-epigenetic-regulation
#16
REVIEW
Frank Lyko
The DNA methyltransferase (DNMT) family comprises a conserved set of DNA-modifying enzymes that have a central role in epigenetic gene regulation. Recent studies have shown that the functions of the canonical DNMT enzymes - DNMT1, DNMT3A and DNMT3B - go beyond their traditional roles of establishing and maintaining DNA methylation patterns. This Review analyses how molecular interactions and changes in gene copy numbers modulate the activity of DNMTs in diverse gene regulatory functions, including transcriptional silencing, transcriptional activation and post-transcriptional regulation by DNMT2-dependent tRNA methylation...
October 16, 2017: Nature Reviews. Genetics
https://www.readbyqxmd.com/read/29027601/dnmt1-dnmt3a-and-dnmt3b-proteins-are-differently-expressed-in-mouse-oocytes-and-early-embryos
#17
Fatma Uysal, Saffet Ozturk, Gokhan Akkoyunlu
DNA methylation is one of the epigenetic mechanisms and plays important roles during oogenesis and early embryo development in mammals. DNA methylation is basically known as adding a methyl group to the fifth carbon atom of cytosine residues within cytosine-phosphate-guanine (CpG) and non-CpG dinucleotide sites. This mechanism is composed of two main processes: de novo methylation and maintenance methylation, both of which are catalyzed by specific DNA methyltransferase (DNMT) enzymes. To date, six different DNMTs have been characterized in mammals defined as DNMT1, DNMT2, DNMT3A, DNMT3B, DNMT3C, and DNMT3L...
December 2017: Journal of Molecular Histology
https://www.readbyqxmd.com/read/29027179/association-of-dnmt3b-283t-c-polymorphism-with-risk-of-lung-and-gastric-cancer-a-case-control-study-and-a-meta-analysis
#18
Xianhong Feng, Jingdong Wang, Xiuli Gu, Jingli Zhang, Xiaolin Li, Zhi Tao, Jiebing Chen, Bifeng Chen
PURPOSE: To investigate the association of DNMT3B -283T>C polymorphism with the risk of lung or gastric cancer, which was followed by a meta-analysis. METHODS: The genotyping of -283T>C was performed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and was confirmed by sequencing. RESULTS: The results of this case-control study showed that -283T>C was not associated with the risk of lung or gastric cancer, and further stratified analysis according to age, gender, smoking status, and alcohol status confirmed the present finding...
October 12, 2017: International Journal of Biological Markers
https://www.readbyqxmd.com/read/29024060/loss-of-dnmt3b-in-chondrocytes-leads-to-delayed-endochondral-ossification-and-fracture-repair
#19
Cuicui Wang, Yousef Abu-Amer, Regis J O'Keefe, Jie Shen
Despite advanced understanding of signaling mediated by local and systemic factors, the role of epigenetic factors in the regulation of bone regeneration remains vague. The DNA methyltransferases (Dnmts) Dnmt3a and Dnmt3b have tissue specific expression patterns and create unique methylation signatures to regulate gene expression. Using a stabilized murine tibia fracture model we find that Dnmt3b is induced early in fracture healing, peaks at 10 days post fracture (dpf), and declines to nearly undetectable levels by 28 dpf...
October 10, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28990350/association-of-dnmt3b-gene-variants-with-sporadic-parkinson-s-disease-in-a-chinese-han-population
#20
Xiang Chen, Yousheng Xiao, Lei Wei, Yijuan Wu, Jianjun Lu, Wenyuan Guo, Shuxuan Huang, Miaomiao Zhou, Mingshu Mo, Zhe Li, Luan Cen, Shaomin Li, ChaohaoYang, Zhuohua Wu, Sophie Hu, Zhong Pei, XinLing Yang, Shaogang Qu, Pingyi Xu
INTRODUCTION: Parkinson's disease (PD) is the second most common neurodegenerative disorder worldwide. Epigenetic modifications, specifically DNA methylation, have been implicated in the development of this disease. Genetic variants of DNA methyltransferase 3b (DNMT3b), one of the most important DNA methyltransferases, were shown to be associated with PD in a Brazilian population. However, it is unclear whether genetic variants of DNMT3b increase the risk of PD in the Chinese Han people...
October 9, 2017: Journal of Gene Medicine
keyword
keyword
23333
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"