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https://www.readbyqxmd.com/read/28646505/hypomethylation-and-decreased-expression-of-brg1-in-the-myocardium-of-patients-with-congenital-heart-disease
#1
Yanyan Qian, Deyong Xiao, Xiao Guo, Hongbo Chen, Lili Hao, Xiaojing Ma, Guoying Huang, Duan Ma, Huijun Wang
BACKGROUND: BRG1, an ATPase subunit of the SWItch/Sucrose Non-Fermentable complex, is tightly associated with cardiac development. However, little is known about the association between the pathogenesis of CHD and BRG1. METHODS: The methylation of a BRG1 promoter and a novel CpG island in the second intron was analyzed in the myocardium of congenital heart disease (CHD) patients (n = 24) and normal controls (n = 11) using pyrosequencing and the MassARRAY platform...
June 24, 2017: Birth defects research
https://www.readbyqxmd.com/read/28632762/dot1l-inhibitor-improves-early-development-of-porcine-somatic-cell-nuclear-transfer-embryos
#2
Jia Tao, Yu Zhang, Xiaoyuan Zuo, Renyun Hong, Hui Li, Xing Liu, Weiping Huang, Zubing Cao, Yunhai Zhang
Incomplete epigenetic reprogramming of the genome of donor cells causes poor early and full-term developmental efficiency of somatic cell nuclear transfer (SCNT) embryos. Previous research indicate that inhibition of the histone H3 K79 methyltransferase DOT1L, using a selective pharmacological inhibitor EPZ004777 (EPZ), significantly improved reprogramming efficiency during the generation of mouse induced pluripotent stem cells. However, the roles of DOT1L in porcine nuclear transfer-mediated cellular reprogramming are not yet known...
2017: PloS One
https://www.readbyqxmd.com/read/28631251/regulation-of-cardiac-myocyte-cell-death-and-differentiation-by-myocardin
#3
REVIEW
Joseph W Gordon
Myocardin is a cardiac- and smooth muscle-enriched transcriptional co-activator that was originally described as an interacting partner of the serum response factor. Shortly after myocardin's discovery, a wealth of published literature described the role of myocardin as a regulator of smooth muscle differentiation and phenotype modulation, while gene-targeting studies confirmed the essential role of myocardin in vascular development. More recently, myocardin has been implicated as an important regulator of cardiac myocyte differentiation in studies demonstrating direct programming of fibroblasts towards the cardiac lineage...
June 19, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28624390/nkx2-5-enhances-the-efficacy-of-mesenchymal-stem-cells-transplantation-in-treatment-heart-failure-in-rats
#4
Bo Deng, Jin Xin Wang, Xing Xing Hu, Peng Duan, Lin Wang, Yang Li, Qing Lei Zhu
AIMS: The aim of this study is to determine whether Nkx2.5 transfection of transplanted bone marrow mesenchymal stem cells (MSCs) improves the efficacy of treatment of adriamycin-induced heart failure in a rat model. MAIN METHODS: Nkx2.5 was transfected in MSCs by lentiviral vector transduction. The expressions of Nkx2.5 and cardiac specific genes in MSCs and Nkx2.5 transfected mesenchymal stem cells (MSCs-Nkx2.5) were analyzed with quantitative real-time PCR and Western blot in vitro...
June 14, 2017: Life Sciences
https://www.readbyqxmd.com/read/28591649/activation-of-lineage-regulators-and-transposable-elements-across-a%C3%A2-pluripotent-spectrum
#5
Jamie A Hackett, Toshihiro Kobayashi, Sabine Dietmann, M Azim Surani
Embryonic stem cells (ESCs) are characterized by the pluripotent capacity to generate all embryonic lineages. Here, we show that ESCs can occupy a spectrum of distinct transcriptional and epigenetic states in response to varied extrinsic conditions. This spectrum broadly corresponds to a developmental continuum of pluripotency and is coupled with a gradient of increasing global DNA methylation. Each pluripotent state is linked with activation of distinct classes of transposable elements (TEs), which in turn influence ESCs through generating chimeric transcripts...
June 6, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28553164/tbx20-loss-of-function-mutation-responsible-for-familial-tetralogy-of-fallot-or-sporadic-persistent-truncus-arteriosus
#6
Ri-Tai Huang, Juan Wang, Song Xue, Xing-Biao Qiu, Hong-Yu Shi, Ruo-Gu Li, Xin-Kai Qu, Xiao-Xiao Yang, Hua Liu, Ning Li, Yan-Jie Li, Ying-Jia Xu, Yi-Qing Yang
Congenital heart disease (CHD), the most common form of developmental abnormality in humans, remains a leading cause of morbidity and mortality in neonates. Genetic defects have been recognized as the predominant causes of CHD. Nevertheless, CHD is of substantial genetic heterogeneity and the genetic defects underlying CHD in most cases remain unclear. In the current study, the coding regions and splicing junction sites of the TBX20 gene, which encodes a T-box transcription factor key to cardiovascular morphogenesis, were sequenced in 175 unrelated patients with CHD, and a novel heterozygous TBX20 mutation, p...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28541271/protein-altering-and-regulatory-genetic-variants-near-gata4-implicated-in-bicuspid-aortic-valve
#7
Bo Yang, Wei Zhou, Jiao Jiao, Jonas B Nielsen, Michael R Mathis, Mahyar Heydarpour, Guillaume Lettre, Lasse Folkersen, Siddharth Prakash, Claudia Schurmann, Lars Fritsche, Gregory A Farnum, Maoxuan Lin, Mohammad Othman, Whitney Hornsby, Anisa Driscoll, Alexandra Levasseur, Marc Thomas, Linda Farhat, Marie-Pierre Dubé, Eric M Isselbacher, Anders Franco-Cereceda, Dong-Chuan Guo, Erwin P Bottinger, G Michael Deeb, Anna Booher, Sachin Kheterpal, Y Eugene Chen, Hyun Min Kang, Jacob Kitzman, Heather J Cordell, Bernard D Keavney, Judith A Goodship, Santhi K Ganesh, Gonçalo Abecasis, Kim A Eagle, Alan P Boyle, Ruth J F Loos, Per Eriksson, Jean-Claude Tardif, Chad M Brummett, Dianna M Milewicz, Simon C Body, Cristen J Willer
Bicuspid aortic valve (BAV) is a heritable congenital heart defect and an important risk factor for valvulopathy and aortopathy. Here we report a genome-wide association scan of 466 BAV cases and 4,660 age, sex and ethnicity-matched controls with replication in up to 1,326 cases and 8,103 controls. We identify association with a noncoding variant 151 kb from the gene encoding the cardiac-specific transcription factor, GATA4, and near-significance for p.Ser377Gly in GATA4. GATA4 was interrupted by CRISPR-Cas9 in induced pluripotent stem cells from healthy donors...
May 25, 2017: Nature Communications
https://www.readbyqxmd.com/read/28527889/enhanced-cardiomyogenic-induction-of-mouse-pluripotent-cells-by-cyclic-mechanical-stretch
#8
Akankshya Shradhanjali, Brandon D Riehl, Jeong Soon Lee, Ligyeom Ha, Jung Yul Lim
The cardiac milieu is mechanically active with spontaneous contraction beginning from early development and persistent through maturation and homeostasis, suggesting that mechanical loading may provide a biomimetic myocardial developmental signal. In this study, we tested the role of cyclic mechanical stretch loading in the cardiomyogenesis of pluripotent murine embryonic (P19) stem cells. A Flexcell tension system was utilized to apply equiaxial stretch (12% strain, 1.25 Hz frequency) to P19 cell-derived embryoid bodies (EBs)...
May 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28522298/%C3%AE-cyclodextrin-induces-the-differentiation-of-resident-cardiac-stem-cells-to-cardiomyocytes-through-autophagy
#9
Xingxing Shi, Wenjing Li, Honghong Liu, Deling Yin, Jing Zhao
Cardiac stem cells (CSCs) have emerged as promising cell candidates to regenerate damaged hearts, because of the potential in differentiating to cardiomyocytes. However, the differentiation is difficult to trigger without inducers. Here we reported that β-cyclodextrin (β-CD) increased the expression of cardiac transcription factors (Nkx2.5 and GATA4), structural proteins (cardiac Troponin T, cTnt), transcriptional enhancer (Mef2c) and induced GATA4 nucleus translocation in adult resident CSCs, thus β-CD could be used to enhance myogenic transition...
May 15, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28511407/gerbode-ventricular-septal-defect-a-rare-cardiac-anomaly-associated-with-genetic-variants-in-indian-population-a-case-series
#10
Yashvanthi Borkar, Krishnananda Nayak, Ranjan K Shetty, Gopalakrishna Bhat, Rajasekhar Moka
Gerbode defects are rare Ventricular Septal Defects (VSD) constituting approximately one percent cases of congenital heart diseases. The genetic predispositions towards the Gerbode Defect (GD) have remained an unexplored area of study till date. We investigated the genotype-phenotype correlation in patients with Gerbode VSD. Molecular genetic study on Sanger sequencing and subsequent data analysis showed that the contributing sequence variations in the NKX2-5, GATA4 and TBX5 gene lies in one of the highly conserved regions and this region is responsible for encoding a functional protein...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28498815/the-optimization-of-cell-therapy-by-combinational-application-with-apicidin-treated-mesenchymal-stem-cells-after-myocardial-infarction
#11
Dong Im Cho, Wan Seok Kang, Moon Hwa Hong, Hye Jin Kang, Mi Ra Kim, Min Chul Kim, Yong Sook Kim, Youngkeun Ahn
Although mesenchymal stem cells (MSC) have been shown to be safe in preclinical studies of cardiovascular disease, multiple meta-analyses have debated whether functional improvement is significant or not. The cardiac differentiation from MSC is achievable using cardiogenic factors, however, the high cost and long culture period may limit the applications. Here, we developed a novel method to optimize the therapeutic outcome for myocardial infarction (MI). Treatment of MSC with apicidin, a histone deacetylase inhibitor, dramatically increased the expressions of cardiac markers such as GATA4, Nkx2...
April 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28490365/differentiation-of-mesenchymal-stem-cells-into-cardiomyocytes-is-regulated-by-mirna-1-2-via-wnt-signaling-pathway
#12
Xing Shen, Bo Pan, Huiming Zhou, Lingjuan Liu, Tiewei Lv, Jing Zhu, Xupei Huang, Jie Tian
BACKGROUND: Bone marrow derived stem cells (BMSCs) have the potential to differentiate into cardiomyocytes, but the rate of differentiation is low and the mechanism of differentiation is unclear completely. Here, we aimed to investigate the role of miR1-2 in differentiation of mouse BMSCs into cardiomyocyte-like cells and reveal the involved signaling pathways in the procedure. METHODS: Mouse BMSCs were treated with miR1-2 and 5-azacytine (5-aza). The expression of cardiac cell markers: NKx2...
May 10, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/28487987/g-protein-phosphorylated-gata4-and-vegf-expression-in-the-hearts-of-transgenic-mice-overexpressing-%C3%AE-1-and-%C3%AE-2-adrenergic-receptors
#13
Hyun-Jin Tae, Natalia Petrashevskaya, In Hye Kim, Joon Ha Park, Jae-Chul Lee, Moo-Ho Won, Yang Hee Kim, Ji Hyeon Ahn, Jinseu Park, Soo Young Choi, Yong Hwan Jeon
β1- and β2-adrenergic receptors (ARs) regulate cardiac contractility, calcium handling and protein phosphorylation. The present study aimed to examine the expression levels of vascular endothelial growth factor A (VEGF‑A) and several G proteins, and the phosphorylation of transcription factor GATA binding protein 4 (GATA4), by western blot analysis, using isolated hearts from 6 month‑old transgenic (TG) mice that overexpress β1AR or β2AR. Cardiac contractility/relaxation and heart rate was increased in both β1AR TG and β2AR TG mouse hearts compared with wild type; however, no significant differences were observed between the β1‑ and β2AR TG mouse hearts...
June 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28484278/role-of-gata-binding-protein-4-gata4-in-the-regulation-of-tooth-development-via-gnai3
#14
Shuyu Guo, Yuxin Zhang, Tingting Zhou, Dongyue Wang, Yajuan Weng, Lin Wang, Junqing Ma
Transcription factor GATA4 regulates cardiac and osteoblast differentiation. However, its role in tooth development is not clear. Therefore, we generated Wnt1-Cre;GATA4 (fl/fl) mice, with conditional inactivation of the GATA4 gene in the dental papilla mesenchymal cells. Phenotypic analysis showed short root deformity along with reduced expressions of odonto/osteogenic markers. Proliferation (but not apoptosis) of cells around the apical area of the root was attenuated. In vitro, we knocked down GATA4 expression in stem cells of dental apical papilla (SCAPs)...
May 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28472748/in%C3%A2-vivo-cardiovascular-toxicity-induced-by-acetochlor-in-zebrafish-larvae
#15
Hongcui Liu, Tianyi Chu, Lili Chen, Wenjun Gui, Guonian Zhu
The risk of acetochlor to human health is still unclear, prompting concern over its risk, especially to pesticide suicides population, occupational population (farmers, retailers and pharmaceutical workers), and special population (young children and infants, pregnant women, older people, and those with compromised immune systems). This study was to explore the toxic effect and the possible mechanism of toxic action of acetochlor using zebrafish larvae whose toxicity profiles have been confirmed to be strikingly similar with mammalian...
April 21, 2017: Chemosphere
https://www.readbyqxmd.com/read/28472341/in-mammalian-foetal-testes-sox9-regulates-expression-of-its-target-genes-by-binding-to-genomic-regions-with-conserved-signatures
#16
Massilva Rahmoun, Rowena Lavery, Sabine Laurent-Chaballier, Nicolas Bellora, Gayle K Philip, Moïra Rossitto, Aleisha Symon, Eric Pailhoux, Florence Cammas, Jessica Chung, Stefan Bagheri-Fam, Mark Murphy, Vivian Bardwell, David Zarkower, Brigitte Boizet-Bonhoure, Philippe Clair, Vincent R Harley, Francis Poulat
In mammalian embryonic gonads, SOX9 is required for the determination of Sertoli cells that orchestrate testis morphogenesis. To identify genetic networks directly regulated by SOX9, we combined analysis of SOX9-bound chromatin regions from murine and bovine foetal testes with sequencing of RNA samples from mouse testes lacking Sox9. We found that SOX9 controls a conserved genetic programme that involves most of the sex-determining genes. In foetal testes, SOX9 modulates both transcription and directly or indirectly sex-specific differential splicing of its target genes through binding to genomic regions with sequence motifs that are conserved among mammals and that we called 'Sertoli Cell Signature' (SCS)...
May 2, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28471988/associations-of-gata4-genetic-mutations-with-the-risk-of-congenital-heart-disease-a-meta-analysis
#17
REVIEW
Yanwei Zhang, Feng Ai, Jiayong Zheng, Bangtian Peng
BACKGROUND: GATA4 gene is a cardiac transcriptional factor playing important role in cardiac formation and development. Three GATA4 gene mutations, 99 G>T, 487 C>T, and 354 A>C, have been reported in congenital heart disease (CHD). Therefore, a meta-analysis was performed to explore the associations between 99 G>T, 487 C>T, or 354 A>C mutations and the risk of CHD. METHODS: We searched the relevant studies in electronic databases, including ISI Science Citation Index, Embase, PubMed, CNKI, and Wan fang, from January 2006 to March 2016...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28462382/gata4-is-sufficient-to-establish-jejunal-versus-ileal-identity-in-the-small-intestine
#18
Cayla A Thompson, Kevin Wojta, Kirthi Pulakanti, Sridhar Rao, Paul Dawson, Michele A Battle
BACKGROUND & AIMS: Patterning of the small intestinal epithelium along its cephalocaudal axis establishes three functionally distinct regions: duodenum, jejunum, and ileum. Efficient nutrient assimilation and growth depend on the proper spatial patterning of specialized digestive and absorptive functions performed by duodenal, jejunal, and ileal enterocytes. When enterocyte function is disrupted by disease or injury, intestinal failure can occur. One approach to alleviate intestinal failure would be to restore lost enterocyte functions...
May 2017: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28447752/islet-1-induces-the-differentiation-of-mesenchymal-stem-cells-into-cardiomyocyte-like-cells-through-the-regulation-of-gcn5-and-dnmt-1
#19
Qin Yi, Hao Xu, Ke Yang, Yue Wang, Bin Tan, Jie Tian, Jing Zhu
Previous studies from this group demonstrated that insulin gene enhancer binding protein ISL-1 (Islet-1) specifically induces the differentiation of mesenchymal stem cells (MSCs) into cardiomyocyte‑like cells through histone acetylation. However, the underlying mechanisms remain unclear. In the present study, the role of the histone acetylation and DNA methylation on the regulatory mechanism of the Islet‑1 was further investigated by methylation‑specific polymerase chain reaction (PCR), chromatin immunoprecipitation quantitative PCR and western blot analysis...
May 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28441648/the-epigenetic-regulation-of-gata4-dependent-brain-natriuretic-peptide-expression-during-alcohol-withdrawal
#20
Alexander Glahn, Mathias Rhein, Annemarie Heberlein, Marc Muschler, Johannes Kornhuber, Helge Frieling, Stefan Bleich, Thomas Hillemacher
OBJECTIVE: Natriuretic peptides participate in the collection of metabolic effects during alcohol withdrawal. Having witnessed modulation of other natriuretic peptides in alcohol-dependent patients during alcohol withdrawal, we were interested in the relation of brain natriuretic peptide (BNP) methylation with protein expression and craving in this longitudinal study. METHODS: Ninety-nine male patients were compared to 101 healthy controls concerning epigenetic regulation and protein expression during detoxification treatment...
2016: Neuropsychobiology
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