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https://www.readbyqxmd.com/read/28630232/long-noncoding-rna-h19-promotes-neuroinflammation-in-ischemic-stroke-by-driving-histone-deacetylase-1-dependent-m1-microglial-polarization
#1
Jue Wang, Haiping Zhao, Zhibin Fan, Guangwen Li, Qingfeng Ma, Zhen Tao, Rongliang Wang, Juan Feng, Yumin Luo
BACKGROUND AND PURPOSE: Long noncoding RNA H19 is repressed after birth, but can be induced by hypoxia. We aim to investigate the impact on and underlying mechanism of H19 induction after ischemic stroke. METHODS: Circulating H19 levels in stroke patients and mice subjected to middle cerebral artery occlusion were assessed using real-time polymerase chain reaction. H19 siRNA and histone deacetylase 1 (HDAC1) plasmid were used to knock down H19 and overexpress HDAC1, respectively...
June 19, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28629288/p53-mutation-and-epigenetic-imprinted-igf2-h19-gene-analysis-in-mesenchymal-stem-cells-derived-from-amniotic-fluid-amnion-endometrium-and-wharton-s-jelly
#2
Tatsanee Phermthai, Puttachart Pokathikorn, Suparat Wichitwiengrat, Sasiprapa Thongbopit, Kittima Tungprasertpol, Suphakde Julavijitphong
Mesenchymal stem cells (MSC) are promising cells for medical therapy. In in vitro expansion, MSC can give rise to progeny with genomic and epigenomic alterations, resulting in senescence, loss terminal differentiation and transformation to cancer. However, MSC genome protects its genetic instability via a guardian function of the P53 tumor suppressor gene and epigenetic balance system during MSC culture. Mutations of P53 and epigenetic alterations have been reported to disrupt the quality and quantity of MSC and initiate tumorigenesis...
June 19, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28624953/genome-wide-analysis-of-differential-dna-methylation-in-silver-russell-syndrome
#3
Di Wu, Chunxiu Gong, Chang Su
Silver-Russell Syndrome (SRS) is clinically heterogeneous disorder characterized by low birth weight, postnatal growth restriction, and variable dysmorphic features. Current evidence strongly implicates imprinted genes as an important etiology of SRS. Although almost half of the patients showed DNA hypomethylation at the H19/IGF2 imprinted domain, and approximately 7%-10% of SRS patients have maternal uniparental disomy of chromosome 7 (UPD (7) mat); the rest of the SRS patients shows unknown etiology. In this study, we investigate whether there are further DNA methylation defects in SRS patients...
June 14, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/28611183/the-lncrna-h19-mediates-breast-cancer-cell-plasticity-during-emt-and-met-plasticity-by-differentially-sponging-mir-200b-c-and-let-7b
#4
Wu Zhou, Xiao-Lei Ye, Jun Xu, Ming-Guo Cao, Zheng-Yu Fang, Ling-Yun Li, Guang-Hui Guan, Qiong Liu, Yue-Hui Qian, Dong Xie
Metastasis is a multistep process by which tumor cells disseminate from their primary site and form secondary tumors at a distant site. The pathophysiological course of metastasis is mediated by the dynamic plasticity of cancer cells, which enables them to shift between epithelial and mesenchymal phenotypes through a transcriptionally regulated program termed epithelial-to-mesenchymal transition (EMT) and its reverse process, mesenchymal-to-epithelial transition (MET). Using a mouse model of spontaneous metastatic breast cancer, we investigated the molecular mediators of metastatic competence within a heterogeneous primary tumor and how these cells then manipulated their epithelial-mesenchymal plasticity during the metastatic process...
June 13, 2017: Science Signaling
https://www.readbyqxmd.com/read/28592837/maternally-derived-15q11-2-q13-1-duplication-and-h19-dmr-hypomethylation-in-a-patient-with-silver-russell-syndrome
#5
Sumito Dateki, Masayo Kagami, Keiko Matsubara, Kei Izumi, Satoshi Watanabe, Akiko Nakatomi, Tatsuro Kondoh, Maki Fukami, Hiroyuki Moriuchi
Silver-Russell syndrome (SRS) is a congenital developmental disorder characterized by intrauterine and postnatal growth failure, craniofacial features (including a triangular shaped face and broad forehead), relative macrocephaly, protruding forehead, body asymmetry and feeding difficulties. Hypomethylation of the H19 differentially methylated region (DMR) on chromosome 11p15.5 is the most common cause of the SRS phenotype. We report the first SRS patient with hypomethylation of the H19-DMR and maternally derived 15q11...
June 8, 2017: Journal of Human Genetics
https://www.readbyqxmd.com/read/28574624/proper-reprogramming-of-imprinted-and-non-imprinted-genes-in-cloned-cattle-gametogenesis
#6
Masahiro Kaneda, Shinya Watanabe, Satoshi Akagi, Yasushi Inaba, Masaya Geshi, Takashi Nagai
Epigenetic abnormalities in cloned animals are caused by incomplete reprogramming of the donor nucleus during the nuclear transfer step (first reprogramming). However, during the second reprogramming step that occurs only in the germline cells, epigenetic errors not corrected during the first step are repaired. Consequently, epigenetic abnormalities in the somatic cells of cloned animals should be erased in their spermatozoa or oocytes. This is supported by the fact that offspring from cloned animals do not exhibit defects at birth or during postnatal development...
June 2, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28573522/embryo%C3%A2-development-after-mitochondrial-supplementation-from-induced-pluripotent-stem-cells
#7
Ruiqi Li, Bingqiang Wen, Haijing Zhao, Nengyong Ouyang, Songbang Ou, Wenjun Wang, Jianyong Han, Dongzi Yang
PURPOSE: The purpose of this study was to evaluate the effects of mitochondrial supplementation (MS) on early embryonic development and to assess the safety of MS treatments using induced pluripotent stem cells (iPSCs) as the mitochondrial donor. METHODS: In this study, we evaluated the effect of MS on early embryonic development using induced pluripotent stem cells (iPSCs) as the donor. Mouse zygotes were injected with either mitochondria from iPSCs or a vehicle solution...
June 1, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28564591/whole-transcriptome-screening-reveals-the-regulatory-targets-and-functions-of-long-non-coding-rna-h19-in-epileptic-rats
#8
Chun-Lei Han, Yun-Peng Liu, Xue-Min Zhao, Kai-Liang Wang, Ning Chen, Wei Hu, Jian-Guo Zhang, Ming Ge, Fan-Gang Meng
Understanding the molecular mechanisms mediating epileptogenesis may lead to the development of preventative therapies against epilepsy. Our previous study demonstrated that the long non-coding RNA H19 contributes to epileptogenesis by aggravating status epilepticus-induced neuronal loss, glial cell activation, mossy fiber sprouting, and cognitive impairments in epileptic rats. However, the systematic functions and downstream targets of H19 associated with epileptogenesis are still unknown. In the present study, high-throughput microarray analysis was used to explore the influence of H19 on gene expression in an epileptic rat model...
May 28, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28555334/prenatal-nicotine-exposure-induces-hpa-axis-hypersensitivity-in-offspring-rats-via-the-intrauterine-programming-of-up-regulation-of-hippocampal-gad67
#9
Xia He, Juan Lu, Wanting Dong, Zhexiao Jiao, Chong Zhang, Ying Yu, Zhaohui Zhang, Hui Wang, Dan Xu
The intrauterine programming of hypothalamic-pituitary-adrenal (HPA) axis hypersensitivity is associated with chronic adult diseases. Our previous studies demonstrated the HPA-axis hypersensitivity in offspring rats induced by prenatal nicotine exposure. The goal of the present study is to further investigate the intrauterine programming mechanism. Pregnant Wistar rats were subcutaneously administered with 2.0 mg/kg day of nicotine from gestational day (GD) 9-20. A group of the pregnant rats was euthanized at GD20, and the fetal rats were extracted...
May 29, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28544374/long-non-coding-rna-h19-promotes-the-proliferation-and-invasion-of-breast-cancer-through-upregulating-dnmt1-expression-by-sponging-mir-152
#10
Zhen Li, Yan Li, Ya Li, Kewei Ren, Xin Li, Xinwei Han, Jiaxiang Wang
Long non-coding RNA (lncRNA) H19 in tumors played important roles in various biological processes. However, the biological role and molecular mechanism of H19 in breast cancer are unclear. Here, we found that H19 was aberrantly upregulated in human breast tumor tissues and cells. A negative correlation between H19 and miR-152 and positive correlation between H19 and DNMT1 mRNA were observed. Downregulation of H19 and DNMT1 significantly retarded breast cancer cell proliferation and invasion. H19 act as an endogenous sponge by directly binding to miR-152...
May 23, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28535307/intergenerational-impact-of-paternal-lifetime-exposures-to-both-folic-acid-deficiency-and-supplementation-on-reproductive-outcomes-and-imprinted-gene-methylation
#11
Lundi Ly, Donovan Chan, Mahmoud Aarabi, Mylène Landry, Nathalie A Behan, Amanda J MacFarlane, Jacquetta Trasler
STUDY QUESTION: Do paternal exposures to folic acid deficient (FD), and/or folic acid supplemented (FS) diets, throughout germ cell development adversely affect male germ cells and consequently offspring health outcomes? SUMMARY ANSWER: Male mice exposed over their lifetimes to both FD and FS diets showed decreased sperm counts and altered imprinted gene methylation with evidence of transmission of adverse effects to the offspring, including increased postnatal-preweaning mortality and variability in imprinted gene methylation...
May 23, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28528181/overexpression-of-long-noncoding-rna-h19-indicates-a-poor-prognosis-for-cholangiocarcinoma-and-promotes-cell-migration-and-invasion-by-affecting-epithelial-mesenchymal-transition
#12
Yi Xu, Zhidong Wang, Xingming Jiang, Yunfu Cui
Cholangiocarcinoma (CCA) is a deadly disease that poorly responds to chemotherapy and radiotherapy and whose incidence has increased worldwide. Furthermore, long noncoding RNAs (lncRNAs) play important roles in multiple biological processes, including tumorigenesis. Specifically, H19, the first discovered lncRNA, has been reported to be overexpressed in diverse human carcinomas, but the overall biological role and clinical significance of H19 in CCA remains unknown. In the present study, expression levels of H19 were investigated in CCA tissues and cell lines and were correlated with clinicopathological features...
May 18, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28515796/genetic-heterogeneity-of-patients-with-suspected-silver-russell-syndrome-genome-wide-copy-number-analysis-in-82-patients-without-imprinting-defects
#13
Takanobu Inoue, Akie Nakamura, Tomoko Fuke, Kazuki Yamazawa, Shinichiro Sano, Keiko Matsubara, Seiji Mizuno, Yoshika Matsukura, Chie Harashima, Tatsuji Hasegawa, Hisakazu Nakajima, Kumi Tsumura, Zenro Kizaki, Akira Oka, Tsutomu Ogata, Maki Fukami, Masayo Kagami
BACKGROUND: Silver-Russell syndrome (SRS) is a rare congenital disorder characterized by pre- and postnatal growth failure and dysmorphic features. Recently, pathogenic copy number variations (PCNVs) and imprinting defects other than hypomethylation of the H19-differentially methylated region (DMR) and maternal uniparental disomy chromosome 7 have been reported in patients with the SRS phenotype. This study aimed to clarify the frequency and clinical features of patients with SRS phenotype caused by PCNVs...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/28512259/long-non-coding-rna-h19-induces-hippocampal-neuronal-apoptosis-via-wnt-signaling-in-a-streptozotocin-induced-rat-model-of-diabetes-mellitus
#14
Yu-Hao Zhao, Tie-Feng Ji, Qi Luo, Jin-Lu Yu
Defects in hippocampal synaptic plasticity and disorders of memory and learning are the central nervous system complications of diabetes mellitus (DM). Here, we used a streptozotocin-induced rat DM model to investigate the effects of long non-coding RNA H19 (lncRNA H19) on learning and memory and apoptosis of hippocampal neurons, and the involvement of the Wnt signaling. Our data demonstrate that lncRNA H19 is highly expressed in rats with DM. Over-expression of lncRNA H19 increased positioning navigation latency in DM rats and decreased duration of space exploration...
April 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28508397/why-are-females-more-susceptible-to-cholestasis-induced-liver-injury-could-it-be-lncrna-h19
#15
EDITORIAL
Grace L Guo
No abstract text is available yet for this article.
May 15, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28500962/the-methylation-levels-of-the-h19-differentially-methylated-region-in-human-umbilical-cords-reflect-newborn-parameters-and-changes-by-maternal-environmental-factors-during-early-pregnancy
#16
Hidenobu Miyaso, Kenichi Sakurai, Shunya Takase, Akifumi Eguchi, Masahiro Watanabe, Hideoki Fukuoka, Chisato Mori
H19 is a tumor-suppressor gene, and changes in the methylation of the H19-differential methylation region (H19-DMR) are related to human health. However, little is known about the factors that regulate the methylation levels of H19-DMR. Several recent studies have shown that maternal environmental factors during pregnancy, such as smoking, drinking, chemical exposure, and nutrient intake, can alter the methylation levels of several genes in fetal tissues. In this study, we examined the effects of maternal factors on changes in the methylation levels of H19-DMR in the human umbilical cord (UC), an extra-embryonic tissue...
August 2017: Environmental Research
https://www.readbyqxmd.com/read/28489339/de-novo-igf2-mutation-on-the-paternal-allele-in-a-patient-with-silver-russell-syndrome-and-ectrodactyly
#17
Kaori Yamoto, Hirotomo Saitsu, Norio Nakagawa, Hisakazu Nakajima, Tatsuji Hasegawa, Yasuko Fujisawa, Masayo Kagami, Maki Fukami, Tsutomu Ogata
Although paternally expressed IGF2 is known to play a critical role in placental and body growth, only a single mutation has been found in IGF2. We identified, through whole exome sequencing, a de novo IGF2 indel mutation leading to frameshift (NM_000612.5:c.110_117delinsAGGTAA, p.(Leu37Glnfs*31)) in a patient with Silver-Russell syndrome, ectrodactyly, undermasculinized genitalia, developmental delay, and placental hypoplasia. Furthermore, we demonstrated that the mutation resided on the paternal allele by sequencing the long-PCR product harboring the mutation and methylation sensitive SmaI and SalI sites before and after SmaI/SalI digestion...
May 10, 2017: Human Mutation
https://www.readbyqxmd.com/read/28484201/epigenetic-analysis-of-bovine-parthenogenetic-embryonic-fibroblasts
#18
Masahiro Kaneda, Masashi Takahashi, Ken-Ichi Yamanaka, Koji Saito, Masanori Taniguchi, Satoshi Akagi, Shinya Watanabe, Takashi Nagai
Although more than 100 imprinted genes have already been identified in the mouse and human genomes, little is known about genomic imprinting in cattle. For a better understanding of these genes in cattle, parthenogenetically activated bovine blastocysts were transferred to recipient cows to obtain parthenotes, and fibroblasts derived from a Day 40 (Day 0 being the day of parthenogenetic activation) parthenogenetic embryo (BpEFs) were successfully obtained. Bovine embryonic fibroblasts (BEFs) were also isolated from a normal fertilized embryo obtained from an artificially inseminated cow...
May 6, 2017: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/28478949/imprinted-disorders-and-growth
#19
Éloïse Giabicani, Frédéric Brioude, Yves Le Bouc, Irène Netchine
Fetal growth is a complex process. Its restriction is associated with morbidity and long-term metabolic consequences. Imprinted genes have a critical role in mammalian fetal growth. Beckwith-Wiedemann syndrome (BWS) and Silver-Russell syndrome (SRS) are two imprinting disorders with opposite fetal growth disturbance. SRS is leading to severe fetal and postnatal growth retardation with severe feeding difficulties during early childhood and long-term metabolic consequences and BWS is an overgrowth syndrome with an enhanced risk of tumors during childhood...
May 4, 2017: Annales D'endocrinologie
https://www.readbyqxmd.com/read/28447380/lncrna-h19-modulates-wnt-%C3%AE-catenin-signaling-by-targeting-dkk4-in-hindlimb-unloaded-rat
#20
Bing Li, Jun Liu, Jie Zhao, Jian-Xiong Ma, Hao-Bo Jia, Yang Zhang, Guo-Sheng Xing, Xin-Long Ma
OBJECTIVE: To investigate the biological functions of long noncoding RNA-H19 (H19) in the pathogenesis of disuse osteoporosis (DOP). METHODS: Fifty-four male Sprague Dawley (SD) rats were randomly divided into three groups: baseline control (BC, 6), age-matched control (AC, 24), and hindlimb unloading (HLU, 24). The rats in the BC group were sacrificed at the beginning of the experiment, while the AC and HLU rats were sacrificed at different times (7, 14, 21 and 28 days after HLU)...
April 26, 2017: Orthopaedic Surgery
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