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https://www.readbyqxmd.com/read/28624413/srsf3-regulated-mir-132-212-controls-cell-migration-and-invasion-by-targeting-yap1
#1
Hye Ree Kim, Su Jin Hwang, Chang Hoon Shin, Kyung Hee Choi, Takbum Ohn, Hyeon Ho Kim
Although SRSF3 (Serine/arginine-rich splicing factor 3) plays a significant role in various biological processes, many of its functions still remain unclear. More particularly, little is known about SRSF3's involvement in the regulation of miRNA. In this report, we found that invasive and migratory abilities were inhibited in SRSF3-silenced U2OS and HeLa cells. We also found that a knockdown of SRSF3 results in a decreased expression level of REST (RE1-silencing transcription factor). The silencing of REST increased the expression of primary miR-132/212 as well as their mature forms...
June 14, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28612866/technetium-99m-complexes-of-l-arginine-derivatives-for-targeting-amino-acid-transporters
#2
Maurício Morais, Vera F C Ferreira, Flávio Figueira, Filipa Mendes, Paula Raposinho, Isabel Santos, Bruno L Oliveira, João D G Correia
Although relevant from the clinical point of view, radiotracers targeting cationic amino acid transporters are relatively unexplored and, in particular, no metal-based radiotracers are known. The rare examples of complexes recognized by amino acid transporters, namely by the Na(+)-independent neutral l-type amino acid transporter 1 (LAT1), are (99m)Tc(i)/Re(i) compounds. Herein, we describe conjugates comprising a pyrazolyl-diamine chelating unit and the cationic amino acid l-arginine (l-Arg) linked by a propyl (L1) or hexyl linker (L2), which allowed the preparation of stable complexes of the type fac-[(99m)Tc(CO)3(k(3)-L)](+) (Tc1, L = L1; Tc2, L = L2) and of the respective surrogates Re1 and Re2...
June 14, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28483947/regulation-of-usp37-expression-by-rest-associated-g9a-dependent-histone-methylation
#3
Tara Dobson, Rashieda J Hatcher, Jyothismathi Swaminathan, Chandra M Das, Shavali Shaik, Rong-Hua Tao, Ciro Milite, Sabrina Castellano, Pete Taylor, Gianluca Sbardella, Vidya Gopalakrishnan
The deubiquitylase (DUB) USP37 is a component of the ubiquitin system and controls cell proliferation by regulating the stability of the cyclin-dependent kinase inhibitor 1B, (CDKN1B/p27Kip1). The expression of USP37 is down-regulated in human medulloblastoma tumor specimens. In the current study we show that USP37 prevents medulloblastoma growth in mouse orthotopic models, suggesting that it has tumor suppressive properties in this neural cancer. Here, we also report on the mechanism underlying USP37 loss in medulloblastoma...
May 8, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28416887/a-preliminary-study-of-pcbs-pahs-pesticides-and-trace-metals-contamination-in-cold-pressed-rapeseed-oils-from-conventional-and-ecological-cultivations
#4
Małgorzata Wroniak, Agnieszka Rękas
The purpose of this study was to investigate the levels of polycyclic aromatic hydrocarbons [benzo(a)anthracene, chrysene, benzo(b)fluoranthene, and benzo(a)pyrene], polychlorinated biphenyls (6 marker and 12 dioxin-like), pesticides (74 compounds) and heavy metals (Pb, Cd, As, Hg, Fe, Cu), in the cold-pressed rapeseed oils from conventional (RC) and ecological cultivations (RE). Similar level of PAHs, PCBs and heavy metals was found in the investigated cold-pressed oils; moreover, no effect of rapeseeds cultivation practice on the level of pesticide residues was found...
April 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28411269/novel-regulatory-mechanisms-for-the-soxc-transcriptional-network-required-for-visual-pathway-development
#5
Kun-Che Chang, Jonathan Hertz, Xiong Zhang, Xiao-Lu Jin, Peter Shaw, Brooke A Derosa, Janet Y Li, Praseeda Venugopalan, Daniel A Valenzuela, Roshni D Patel, Kristina R Russano, Shomoukh A Alshamekh, Catalina Sun, Kevin Tenerelli, Chenyi Li, Dmitri Velmeshev, Yuyan Cheng, Timothy M Boyce, Alexandra Dreyfuss, Mohammed S Uddin, Kenneth J Muller, Derek M Dykxhoorn, Jeffrey L Goldberg
What pathways specify retinal ganglion cell (RGC) fate in the developing retina? Here we report on mechanisms by which a molecular pathway involving Sox4/Sox11 is required for RGC differentiation and for optic nerve formation in mice in vivo, and is sufficient to differentiate human induced pluripotent stem cells into electrophysiologically active RGCs. These data place Sox4 downstream of RE1 silencing transcription factor in regulating RGC fate, and further describe a newly identified, Sox4-regulated site for post-translational modification with small ubiquitin-related modifier (SUMOylation) in Sox11, which suppresses Sox11's nuclear localization and its ability to promote RGC differentiation, providing a mechanism for the SoxC familial compensation observed here and elsewhere in the nervous system...
May 10, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28408934/sdf-1-cxcr4-signaling-maintains-stemness-signature-in-mouse-neural-stem-progenitor-cells
#6
Shih-Yin Ho, Thai-Yen Ling, Hsing-Yu Lin, Jeffrey Tsai-Jui Liou, Fei-Chih Liu, I-Chun Chen, Sue-Wei Lee, Yu Hsu, Dar-Ming Lai, Horng-Huei Liou
SDF-1 and its primary receptor, CXCR4, are highly expressed in the embryonic central nervous system (CNS) and play a crucial role in brain architecture. Loss of SDF-1/CXCR4 signaling causes abnormal development of neural stem/progenitor cells (NSCs/NPCs) in the cerebellum, hippocampus, and cortex. However, the mechanism of SDF-1/CXCR4 axis in NSCs/NPCs regulation remains unknown. In this study, we found that elimination of SDF-1/CXCR4 transduction caused NSCs/NPCs to lose their stemness characteristics and to encounter neurogenic differentiation...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28379941/myt1l-safeguards-neuronal-identity-by-actively-repressing-many-non-neuronal-fates
#7
Moritz Mall, Michael S Kareta, Soham Chanda, Henrik Ahlenius, Nicholas Perotti, Bo Zhou, Sarah D Grieder, Xuecai Ge, Sienna Drake, Cheen Euong Ang, Brandon M Walker, Thomas Vierbuchen, Daniel R Fuentes, Philip Brennecke, Kazuhiro R Nitta, Arttu Jolma, Lars M Steinmetz, Jussi Taipale, Thomas C Südhof, Marius Wernig
Normal differentiation and induced reprogramming require the activation of target cell programs and silencing of donor cell programs. In reprogramming, the same factors are often used to reprogram many different donor cell types. As most developmental repressors, such as RE1-silencing transcription factor (REST) and Groucho (also known as TLE), are considered lineage-specific repressors, it remains unclear how identical combinations of transcription factors can silence so many different donor programs. Distinct lineage repressors would have to be induced in different donor cell types...
April 13, 2017: Nature
https://www.readbyqxmd.com/read/28369444/med12-related-xlid-disorders-are-dose-dependent-of-immediate-early-genes-iegs-expression
#8
Lise-Marie Donnio, Baptiste Bidon, Satoru Hashimoto, Melanie May, Alexey Epanchintsev, Colm Ryan, William Allen, Anna Hackett, Jozef Gecz, Cindy Skinner, Roger E Stevenson, Arjan P M de Brouwer, Charles Coutton, Christine Francannet, Pierre-Simon Jouk, Charles E Schwartz, Jean-Marc Egly
Mediator occupies a key role in protein coding genes expression in mediating the contacts between gene specific factors and the basal transcription machinery but little is known regarding the role of each Mediator subunits. Mutations in MED12 are linked with a broad spectrum of genetic disorders with X-linked intellectual disability that are difficult to range as Lujan, Opitz-Kaveggia or Ohdo syndromes. Here, we investigated several MED12 patients mutations (p.R206Q, p.N898D, p.R961W, p.N1007S, p.R1148H, p...
June 1, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28345906/malonylginsenosides-with-potential-antidiabetic-activities-from-the-flower-buds-of-panax-ginseng
#9
Shi Qiu, Wen-Zhi Yang, Chang-Liang Yao, Xiao-Jian Shi, Jing-Ya Li, Yang Lou, Ya-Nan Duan, Wan-Ying Wu, De-An Guo
LC-MS-guided phytochemical isolation of malonylginsenosides, featuring neutral elimination of CO2 and C3H2O3 by the negative mode collision-induced dissociation, from the flower buds of Panax ginseng led to the isolation of 19 malonyl-substituted triterpenoid saponins. They include 15 new malonylginsenosides, malonylfloralginsenosides-Re1-Re3 (1-3), -Rb1 and -Rb2 (4, 5), -Rd1-Rd6 (6-11), and -Rc1-Rc4 (12-15), and the known m-Rb1, m-Rc, m-Rb2, and m-Rd (16-19). Compound 11 represents the first dimalonyl saponin isolated from the Panax genus, while 2-4, 9, and 10 are five ginsenosides with single malonylation at the C-20 sugar chain...
March 27, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28218430/stepwise-assembly-of-functional-c-terminal-rest-nrsf-transcriptional-repressor-complexes-as-a-drug-target
#10
Ken Inui, Zongpei Zhao, Juan Yuan, Sakthidasan Jayaprakash, Le T M Le, Srdja Drakulic, Bjoern Sander, Monika M Golas
In human cells, thousands of predominantly neuronal genes are regulated by the repressor element 1 (RE1)-silencing transcription factor/neuron-restrictive silencer factor (REST/NRSF). REST/NRSF represses transcription of these genes in stem cells and non-neuronal cells by tethering corepressor complexes. Aberrant REST/NRSF expression and intracellular localization are associated with cancer and neurodegeneration in humans. To date, detailed molecular analyses of REST/NRSF and its C-terminal repressor complex have been hampered largely by the lack of sufficient amounts of purified REST/NRSF and its complexes...
May 2017: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/28197553/the-role-of-sirt1-in-epileptogenesis
#11
Alicia M Hall, Gary P Brennan, Tiffany M Nguyen, Akanksha Singh-Taylor, Hyun-Seung Mun, Mary J Sargious, Tallie Z Baram
The mechanisms by which brain insults lead to subsequent epilepsy remain unclear. Insults, including trauma, stroke, tumors, infections, and long seizures [status epilepticus (SE)], create a neuronal state of increased metabolic demand or decreased energy supply. Neurons express molecules that monitor their metabolic state, including sirtuins (Sirts). Sirtuins deacetylate cytoplasmic proteins and nuclear histones, and their epigenetic modulation of the chromatin governs the expression of many genes, influencing neuronal properties...
January 2017: ENeuro
https://www.readbyqxmd.com/read/28142142/the-rs1277306-variant-of-the-rest-gene-confers-susceptibility-to-cognitive-aging-in-an-elderly-taiwanese-population
#12
Eugene Lin, Shih-Jen Tsai, Po-Hsiu Kuo, Yu-Li Liu, Albert C Yang, Chung-Feng Kao, Cheng-Hung Yang
BACKGROUND/AIMS: There is growing evidence that the RE1-silencing transcription factor (REST) gene may contribute to cognitive aging and Alzheimer diseases. In this replication study, we reassessed whether single nucleotide polymorphisms (SNPs) within the REST gene are linked with cognitive aging independently and/or through complex interactions in an older Taiwanese population. METHODS: A total of 634 Taiwanese subjects aged over 60 years from the Taiwan Biobank were analyzed...
2017: Dementia and Geriatric Cognitive Disorders
https://www.readbyqxmd.com/read/28122430/exosome-based-delivery-of-mir-124-in-a-huntington-s-disease-model
#13
Soon-Tae Lee, Wooseok Im, Jae-Jun Ban, Mijung Lee, Keun-Hwa Jung, Sang Kun Lee, Kon Chu, Manho Kim
OBJECTIVE: Huntington's disease (HD) is a genetic neurodegenerative disease that is caused by abnormal CAG expansion. Altered microRNA (miRNA) expression also causes abnormal gene regulation in this neurodegenerative disease. The delivery of abnormally downregulated miRNAs might restore normal gene regulation and have a therapeutic effect. METHODS: We developed an exosome-based delivery method to treat this neurodegenerative disease. miR-124, one of the key miRNAs that is repressed in HD, was stably overexpressed in a stable cell line...
January 2017: Journal of Movement Disorders
https://www.readbyqxmd.com/read/28049845/rest-corepressors-rcor1-and-rcor2-and-the-repressor-insm1-regulate-the-proliferation-differentiation-balance-in-the-developing-brain
#14
Caitlin E Monaghan, Tamilla Nechiporuk, Sophia Jeng, Shannon K McWeeney, Jianxun Wang, Michael G Rosenfeld, Gail Mandel
The transcriptional events that lead to the cessation of neural proliferation, and therefore enable the production of proper numbers of differentiated neurons and glia, are still largely uncharacterized. Here, we report that the transcription factor Insulinoma-associated 1 (INSM1) forms complexes with RE1 Silencing Transcription factor (REST) corepressors RCOR1 and RCOR2 in progenitors in embryonic mouse brain. Mice lacking both RCOR1 and RCOR2 in developing brain die perinatally and generate an abnormally high number of neural progenitors at the expense of differentiated neurons and oligodendrocyte precursor cells...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28040710/rest-represses-mir-124-and-mir-203-to-regulate-distinct-oncogenic-properties-of-glioblastoma-stem-cells
#15
Anantha L Marisetty, Sanjay K Singh, Tran N Nguyen, Cristian Coarfa, Bin Liu, Sadhan Majumder
Background.: Glioblastoma (GBM) is one of the most common, aggressive, and invasive human brain tumors. There are few reliable mechanism-based therapeutic approaches for GBM patients. The transcriptional repressor RE1 silencing transcriptional factor (REST) regulates the oncogenic properties of a class of GBM stem-like cells (high-REST [HR]-GSCs) in humans. However, it has been unclear whether REST represses specific targets to regulate specific oncogenic functions or represses all targets with overlapping functions in GSCs...
April 1, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/27956636/accomplishing-simple-solubility-based-separations-of-rare-earth-elements-with-complexes-bearing-size-sensitive-molecular-apertures
#16
Justin A Bogart, Bren E Cole, Michael A Boreen, Connor A Lippincott, Brian C Manor, Patrick J Carroll, Eric J Schelter
Rare earth (RE) metals are critical components of electronic materials and permanent magnets. Recycling of consumer materials is a promising new source of rare REs. To incentivize recycling, there is a clear need for the development of simple methods for targeted separations of mixtures of RE metal salts. Metal complexes of a tripodal hydroxylaminato ligand, TriNOx(3-), featured a size-sensitive aperture formed of its three η(2)-(N,O) ligand arms. Exposure of cations in the aperture induced a self-associative equilibrium comprising RE(TriNOx)THF and [RE(TriNOx)]2 species...
December 27, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27956497/non-cpg-methylation-by-dnmt3b-facilitates-rest-binding-and-gene-silencing-in-developing-mouse-hearts
#17
Donghong Zhang, Bingruo Wu, Ping Wang, Yidong Wang, Pengfei Lu, Tamilla Nechiporuk, Thomas Floss, John M Greally, Deyou Zheng, Bin Zhou
The dynamic interaction of DNA methylation and transcription factor binding in regulating spatiotemporal gene expression is essential for embryogenesis, but the underlying mechanisms remain understudied. In this study, using mouse models and integration of in vitro and in vivo genetic and epigenetic analyses, we show that the binding of REST (repressor element 1 (RE1) silencing transcription factor; also known as NRSF) to its cognate RE1 sequences is temporally regulated by non-CpG methylation. This process is dependent on DNA methyltransferase 3B (DNMT3B) and leads to suppression of adult cardiac genes in developing hearts...
April 7, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/27940549/repression-of-telomerase-gene-promoter-requires-human-specific-genomic-context-and-is-mediated-by-multiple-hdac1-containing-corepressor-complexes
#18
De Cheng, Yuanjun Zhao, Shuwen Wang, Fan Zhang, Mariano Russo, Steven B McMahon, Jiyue Zhu
The human telomerase reverse transcriptase (hTERT) gene is repressed in most somatic cells, whereas the expression of the mouse mTert gene is widely detected. To understand the mechanisms of this human-specific repression, we constructed bacterial artificial chromosome (BAC) reporters using human and mouse genomic DNAs encompassing the TERT genes and neighboring loci. Upon chromosomal integration, the hTERT, but not the mTert, reporter was stringently repressed in telomerase-negative human cells in a histone deacetylase (HDAC)-dependent manner, replicating the expression of their respective endogenous genes...
March 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/27748809/decreased-expression-of-mir%C3%A2-9-due-to-e50k%C3%A2-optn-mutation-causes-disruption-of-the-expression-of-bdnf-leading-to-rgc%C3%A2-5-cell-apoptosis
#19
Bo Jiang, Lin Gao, Dawei Lei, Jiannan Liu, Zhengbo Shao, Xinrong Zhou, Renke Li, Donglai Wu, Fei Xue, Yuanmao Zhu, Huiping Yuan
The aims of the present study were to investigate the effect of E50K optineurin (OPTN) mutation on RGC‑5 cells and to define the role of microRNA‑9 (miR‑9) in this system. Transfected RGC‑5 cells were used to evaluate the effects of E50K OPTN on the expression of miR‑9 and subsequent disruption of RGC‑5 cell apoptosis was analyzed using western blotting. The results showed that the expression of E50K OPTN was associated with a marked reduction in the levels of miR‑9 in the E50K OPTN‑transfected RGC‑5 cells...
November 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27685921/expression-profiling-of-re1-silencing-transcription-factor-rest-rest-corepressor-1-rcor1-and-synapsin-1-syn1-genes-in-human-gliomas
#20
Musteyde Yucebas, Sunde Yilmaz Susluer, Hasan Onur Caglar, Tugce Balci, Z Ozlem Dogan Sigva, Taner Akalin, Nezih Oktar, Tayfun Dalbasti, Cigir Biray Avci, Cumhur Gunduz
PURPOSE: The repressor element 1 (RE-1) silencing transcription factor (REST) is a transcription factor which represses the expression of neuronal differentiation-related genes including SYN1 gene. CoREST, encoded by RCOR1 gene, binds to the REST protein for remodeling of chromatin structure. Although there is a relation among REST, RCOR1, and SYN1 genes, the role of these genes in glioma tumors is still unclear. In this study, expressions of REST, RCOR1, and SYN1 genes were detected in primary cultures derived from tumor samples of diffuse astrocytoma (DA), anaplastic oligodendroglioma (AO), and glioblastoma multiforme (GBM) cases...
July 2016: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
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