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https://www.readbyqxmd.com/read/29452227/age-and-experience-dependent-changes-in-egr-1-expression-during-the-ontogeny-of-the-context-preexposure-facilitation-effect-cpfe
#1
P A Robinson-Drummer, T Chakraborty, N A Heroux, J B Rosen, M E Stanton
The context preexposure facilitation effect (CPFE) is a variant of contextual fear conditioning in which acquisition of the contextual representation and association of the retrieved contextual memory with an immediate foots-hock are separated by 24hrs. During the CPFE, learning- related expression patterns of the early growth response -1 gene (Egr-1) vary based on training phase and brain sub-region in adult and adolescent rats (Asok, Schreiber, Jablonski, Rosen, & Stanton, 2013; Shreiber et al., 2014; Chakraborty, Asok, Stanton, & Rosen, 2016)...
February 13, 2018: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29422863/n-n-butyl-haloperidol-iodide-a-derivative-of-the-anti-psychotic-haloperidol-antagonizes-hypoxia-reoxygenation-injury-by-inhibiting-an-egr-1-ros-positive-feedback-loop-in-h9c2-cells
#2
Ting Sun, Yanmei Zhang, Shuping Zhong, Fenfei Gao, Yicun Chen, Bin Wang, Wenfeng Cai, Zhaojing Zhang, Weiqiu Li, Shishi Lu, Fuchun Zheng, Ganggang Shi
Early growth response-1 (Egr-1), a transcription factor which often underlies the molecular basis of myocardial ischemia/reperfusion (I/R) injury, and oxidative stress, is key to myocardial I/R injury. Silent information regulator of transcription 1(SIRT1) not only interacts with and is inhibited by Egr-1, but also downregulates reactive oxygen species (ROS) via the Forkhead box O1(FOXO1)/manganese superoxide dismutase (Mn-SOD) signaling pathway. N-n-butyl haloperidol iodide (F2), a new patented compound, protects the myocardium against myocardial I/R injury in various animal I/R models in vivo and various heart-derived cell hypoxia/reoxygenation (H/R) models in vitro...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29408223/egr-1-is-required-for-neu-her2-induced-mammary-tumors
#3
Sunhwa Oh, Hyungjoo Kim, KeeSoo Nam, Incheol Shin
Egr-1 is known to function mainly as a tumor suppressor through direct regulation of multiple tumor suppressor genes. To determine the role of Egr-1 in breast tumors in vivo, we used mouse models of breast cancer induced by HER2/neu. We compared neu-overexpressing Egr-1 knockout mice (neu/Egr-1 KO) to neu-overexpressing Egr-1 wild type or heterozygote mice (neu/Egr-1 WT or neu/Egr-1 het) with regard to onset of tumor appearance and number of tumors per mouse. In addition, to examine the role of Egr-1 in vitro, we established neu/Egr-1 WT and KO tumor cell lines derived from breast tumors developed in each mouse...
February 2, 2018: Cellular Signalling
https://www.readbyqxmd.com/read/29386366/evolutionary-conserved-neural-signature-of-early-life-stress-affects-animal-social-competence
#4
Cecilia Nyman, Stefan Fischer, Nadia Aubin-Horth, Barbara Taborsky
In vertebrates, the early social environment can persistently influence behaviour and social competence later in life. However, the molecular mechanisms underlying variation in animal social competence are largely unknown. In rats, high-quality maternal care causes an upregulation of hippocampal glucocorticoid receptors (gr) and reduces offspring stress responsiveness. This identifies gr regulation as a candidate mechanism for maintaining variation in animal social competence. We tested this hypothesis in a highly social cichlid fish, Neolamprologus pulcher, reared with or without caring parents...
January 31, 2018: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29383185/gper-independent-inhibition-of-adrenocortical-cancer-growth-by-g-1-involves-ros-egr-1-bax-pathway
#5
Ivan Casaburi, Paola Avena, Arianna De Luca, Rosa Sirianni, Vittoria Rago, Adele Chimento, Francesca Trotta, Carmela Campana, William E Rainey, Vincenzo Pezzi
We previously demonstrated that treatment of the H295R adrenocortical cancer cell line with the non-steroidal, high-affinity GPER (G protein-coupled estrogen receptor 1) agonist G-1 reduced tumor growth in vitro and in vivo through a GPER independent action. Moreover, we observed that G-1 treatment induces cell-cycle arrest and apoptosis following a sustained ERK1/2 activation. However, the precise mechanisms causing these effects were not clarified. Starting from our preliminary published results, we performed a microarray study that clearly evidenced a strong and significative up-regulation of EGR-1 gene in H295R cells treated for 24h with micromolar concentration of G-1...
December 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/29381770/the-conserved-basic-residues-and-the-charged-amino-acid-residues-at-the-%C3%AE-helix-of-the-zinc-finger-motif-regulate-the-nuclear-transport-activity-of-triple-c2h2-zinc-finger-proteins
#6
Chih-Ying Lin, Lih-Yuan Lin
Zinc finger (ZF) motifs on proteins are frequently recognized as a structure for DNA binding. Accumulated reports indicate that ZF motifs contain nuclear localization signal (NLS) to facilitate the transport of ZF proteins into nucleus. We investigated the critical factors that facilitate the nuclear transport of triple C2H2 ZF proteins. Three conserved basic residues (hot spots) were identified among the ZF sequences of triple C2H2 ZF proteins that reportedly have NLS function. Additional basic residues can be found on the α-helix of the ZFs...
2018: PloS One
https://www.readbyqxmd.com/read/29377956/an-egr-performance-evaluation-and-decision-making-approach-based-on-grey-theory-and-grey-entropy-analysis
#7
Xianghuan Zu, Chuanlei Yang, Hechun Wang, Yinyan Wang
Exhaust gas recirculation (EGR) is one of the main methods of reducing NOX emissions and has been widely used in marine diesel engines. This paper proposes an optimized comprehensive assessment method based on multi-objective grey situation decision theory, grey relation theory and grey entropy analysis to evaluate the performance and optimize rate determination of EGR, which currently lack clear theoretical guidance. First, multi-objective grey situation decision theory is used to establish the initial decision-making model according to the main EGR parameters...
2018: PloS One
https://www.readbyqxmd.com/read/29367088/sinomenine-inhibits-fibroblast-like-synoviocyte-proliferation-by-regulating-%C3%AE-7nachr-expression-via-erk-egr-1-pathway
#8
Lang Yi, Yan-Jun Lyn, Chong Peng, Rui-Li Zhu, Sha-Sha Bai, Liang Liu, Pei-Xun Wang, Hua Zhou, Yan Dong
Fibroblast like synoviocyte (FLS) is a crucial in the pathogenesis of rheumatoid arthritis (RA), and involved in inflammation and joint destruction. Sinomenine (SIN), an alkaloid derived from the plant Sinomenium acutum, has anti-inflammatory and analgesic effect and been used for RA treatment in China. Alpha 7 nicotinic acetylcholine receptors (α7nAChR), as the key receptor in cholinergic anti-inflammatory pathway (CAP) to inhibit inflammation, has been detected in RA patients synovium, but its role is still unclear...
January 20, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29357360/signalling-crosstalk-during-early-tumorigenesis-in-the-absence-of-polycomb-silencing
#9
Jorge V Beira, Joana Torres, Renato Paro
In response to stress and injury a coordinated activation of conserved signalling modules, such as JNK and JAK/STAT, is critical to trigger regenerative tissue restoration. While these pathways rebuild homeostasis and promote faithful organ recovery, it is intriguing that they also become activated in various tumour conditions. Therefore, it is crucial to understand how similar pathways can achieve context-dependent functional outputs, likely depending on cellular states. Compromised chromatin regulation, upon removal of the Polycomb group member polyhomeotic, leads to tumour formation with ectopic activation of JNK signalling, mediated by egr/grnd, in addition to JAK/STAT and Notch...
January 22, 2018: PLoS Genetics
https://www.readbyqxmd.com/read/29337144/early-activation-of-egr-1-promotes-neuroinflammation-and-dopaminergic-neurodegeneration-in-an-experimental-model-of-parkinson-s-disease
#10
Qing Yu, Qiaoying Huang, Xiaoxiao Du, Shao Xu, Mingtao Li, Shanshan Ma
The progressive loss of dopaminergic neurons in the substantia nigra pars compacta (SNpc) is one of the hallmarks of Parkinson's disease (PD). Neuroinflammation has been proposed to contributes to the progressive nature of the disease. Early growth response-1 (Egr-1), a zinc finger transcription factor, has been shown to have a crucial role in both neuronal death and the inflammatory response. However, whether and how Egr-1 is involved in the pathogenesis of PD has not been investigated. Using the subacute 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) mouse model of PD, we identified early peak induction of Egr-1 in the SNpc but not in the striatum...
January 11, 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29321993/sansoninto-a-traditional-herbal-medicine-ameliorates-behavioral-abnormalities-and-down-regulation-of-early-growth-response-1-expression-in-mice-exposed-to-social-isolation-stress
#11
Hironori Fujiwara, Ryohei Tsushima, Ryo Okada, Suresh Awale, Ryota Araki, Takeshi Yabe, Kinzo Matsumoto
Social isolation (SI) mice exhibit behavioral abnormalities such as impairments of sociability- and attention-like behaviors, offering an animal model of neurodevelopmental disorders such as attention-deficit/hyperactivity disorder (ADHD). This study aimed to identify the effects of Sansoninto (SST; suān zǎo rén tāng) on the psychiatric symptoms related to ADHD using SI mice. Four-week-old mice were socially isolated during the experimental period, and SST administration (800 or 2400 mg/kg, p.o.) was started at 2 weeks after starting SI...
January 2018: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29317682/piperonylic-acid-stimulates-keratinocyte-growth-and-survival-by-activating-epidermal-growth-factor-receptor-egfr
#12
Dohyun Lee, Jinsun Lim, Kyung-Chul Woo, Kyong-Tai Kim
Epidermal growth factor (EGF) stimulates cell growth, proliferation, and survival. The biological benefits of EGF have been utilized in medical uses for improving wound healing as well as in today's skin cosmetics. EGF has been found in urine, saliva, milk, and plasma, but its efficient isolation remains a difficult task. With technical advances, recombinant protein purification technique has been used for EGF production. However, the recombinant EGF is still expensive and keeping it with stable activity is difficult to be used widely...
January 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29314730/transcription-factors-early-growth-response-gene-egr-2-and-3-control-inflammatory-responses-of-tolerant-t-cells
#13
Becky Omodho, Tizong Miao, Alistair L J Symonds, Randeep Singh, Suling Li, Ping Wang
INTRODUCTION: Impaired proliferation and production of IL2 are the hallmarks of experimental T cell tolerance. However, in most autoimmune diseases, auto-reactive T cells do not display hyper proliferation, but inflammatory phenotypes. METHODS: We have now demonstrated that the transcription factors Egr2 and 3 are important for the control of inflammatory cytokine production by tolerant T cells, but not for tolerance induction. RESULTS: In the absence of Egr2 and 3, T cell tolerance, as measured by impaired proliferation and production of IL2, can still be induced, but tolerant T cells produced high levels of inflammatory cytokines...
January 3, 2018: Immunity, Inflammation and Disease
https://www.readbyqxmd.com/read/29305749/dna-methylation-variability-in-a-single-locus-of-the-rxr%C3%AE-promoter-from-umbilical-vein-blood-at-term-pregnancy
#14
Diana Chávez-Lizárraga, Paola Zárate-Segura, Jorge Beltrán-Montoya, Carmen Canchola-Sotelo, Felipe Vadillo-Ortega, Erika Chavira-Suárez
DNA methylation status of RXRα gene promoter has been correlated with maternal diet during early pregnancy, and associated with offspring's adiposity and bone mineral content. In adult life, increased methylation of RXRα promoter region is associated with myocardium pathologies. Early growth response proteins (EGR) are zinc finger transcription factors associated with several cellular pathways such as inflammation, apoptosis, and cardiopathies. DNA-binding sequences of EGR proteins have been reported in the RXRα gene promoter using chromatin immunoprecipitation methods...
January 6, 2018: Biochemical Genetics
https://www.readbyqxmd.com/read/29305012/regulation-of-gene-transcription-following-stimulation-of-transient-receptor-potential-trp-channels
#15
Gerald Thiel, Andrea Lesch, Sandra Rubil, Tobias M Backes, Oliver G Rössler
Transient receptor potential (TRP) channels belong to a heterogeneous superfamily of cation channels that are involved in the regulation of numerous biological functions, including regulation of Ca2+ and glucose homeostasis, tumorigenesis, temperature, and pain sensation. To understand the functions of TRP channels, their associated intracellular signaling pathways and molecular targets have to be identified on the cellular level. Stimulation of TRP channels frequently induces an influx of Ca2+ ions into the cells and the subsequent activation of protein kinases...
2018: International Review of Cell and Molecular Biology
https://www.readbyqxmd.com/read/29288726/phenylethanolamine-n-methyltransferase-gene-expression-in-pc12-cells-exposed-to-intermittent-hypoxia
#16
Sandhya Khurana, Siyuan Peng, Erika McDonald, William Yates, Krishnan Venkataraman, T C Tai
Epidemiological studies show a strong correlation between Obstructive Sleep Apnea (OSA) and cardiovascular disorders. OSA patients experience intermittent hypoxia (IH), characterized by brief, but recurring episodes of cessation in breathing. These patients have higher levels of circulating catecholamines and an increased incidence of hypertension; however the mechanisms defining this association are not clearly established. Genetic linkage studies have associated the phenylethanolamine N-methyltransferase (PNMT) gene to the development of hypertension...
December 27, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29282485/identification-of-a-novel-lncrna-induced-by-the-nephrotoxin-ochratoxin-a-and-expressed-in-human-renal-tumor-tissue
#17
Mirjana Polovic, Sandro Dittmar, Isabell Hennemeier, Hans-Ulrich Humpf, Barbara Seliger, Paolo Fornara, Gerit Theil, Patrick Azinovic, Alexander Nolze, Marcel Köhn, Gerald Schwerdt, Michael Gekle
Long non-coding RNAs represent a fraction of the transcriptome that is being increasingly recognized. For most of them no function has been allocated so far. Here, we describe the nature and function of a novel non-protein-coding transcript, named WISP1-AS1, discovered in human renal proximal tubule cells exposed to the carcinogenic nephrotoxin ochratoxin A. WISP1-AS1 overlaps parts of the fourth intron and fifth exon of the Wnt1-inducible signaling pathway protein 1 (WISP1) gene. The transcript is 2922 nucleotides long, transcribed in antisense direction and predominantly localized in the nucleus...
December 27, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/29260725/sensitive-detection-of-hydroquinone-using-exfoliated-graphene-au-glassy-carbon-modified-electrode
#18
Florina Pogacean, Maria Coros, Lidia Magerusan, Marcela Corina Rosu, Crina A Socaci, Stefan Gergely, Raluca Ioana Stefan van Staden, Marioara Moldovan, Codruta Sarosi, Stela Pruneanu
Graphene nanosheets (EGr) were electrochemically prepared through one-step exfoliation of graphite rod in a mixture of H2SO4:HNO3 (3:1) at low bias (4 V). Subsequently, gold nanoparticles were attached to graphene surface (EGr-Au) by the reduction of the metal precursor (HAuCl4) in aqueous solution containing dispersed graphene sheets. According to the XRD investigation, the synthesized material consists in a mixture of few-layer (86%) and multi-layer graphene (14%). The interlayer distance was found to be in the range of 0...
December 20, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29259250/snail-collaborates-with-egr-1-and-sp-1-to-directly-activate-transcription-of-mmp-9-and-zeb1
#19
Wen-Sheng Wu, Ren-In You, Chuan-Chu Cheng, Ming-Che Lee, Teng-Yi Lin, Chi-Tan Hu
The Snail transcription factor plays as a master regulator of epithelial mesenchymal transition (EMT), one of the steps of tumor metastasis. Snail enhances expressions of a lot of mesenchymal genes including the matrix degradation enzyme matrix metalloproteinases 9 (MMP9) and the EMT transcription factor zinc finger E-box binding homeobox 1 (ZEB1), however, the underlying mechanisms are not clarified. Herein, we investigated how Snail upregulated transcription of ZEB1 and MMP9 induced by the tumor promoter 12-O-tetradecanoyl-phorbol 13-acetate (TPA) in hepatoma cell HepG2...
December 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29222058/differential-expression-of-the-immediate-early-genes-c-fos-arc-egr-1-and-npas4-during-long-term-memory-formation-in-the-context-preexposure-facilitation-effect-cpfe
#20
Nicholas A Heroux, Brittany F Osborne, Lauren A Miller, Malak Kawan, Katelyn N Buban, Jeffrey B Rosen, Mark E Stanton
No abstract text is available yet for this article.
December 5, 2017: Neurobiology of Learning and Memory
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