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https://www.readbyqxmd.com/read/27914009/serum-response-factor-srf-ablation-interferes-with-acute-stress-associated-immediate-and-long-term-coping-mechanisms
#1
Annemarie Zimprich, Gabi Mroz, Christopher Meyer Zu Reckendorf, Sofia Anastasiadou, Philip Förstner, Lillian Garrett, Sabine M Hölter, Lore Becker, Jan Rozman, Cornelia Prehn, Birgit Rathkolb, Kristin Moreth, Wolfgang Wurst, Thomas Klopstock, Martin Klingenspor, Jerzy Adamski, Eckhard Wolf, Raffi Bekeredjian, Helmut Fuchs, Valerie Gailus-Durner, Martin Hrabe de Angelis, Bernd Knöll
Stress experience modulates behavior, metabolism, and energy expenditure of organisms. One molecular hallmark of an acute stress response is a rapid induction of immediate early genes (IEGs) such as c-Fos and Egr family members. IEG transcription in neurons is mediated by the neuronal activity-driven gene regulator serum response factor (SRF). We show a first role of SRF in immediate and long-lasting acute restraint stress (AS) responses. For this, we employed a standardized mouse phenotyping protocol at the German Mouse Clinic (GMC) including behavioral, metabolic, and cardiologic tests as well as gene expression profiling to analyze the consequences of forebrain-specific SRF deletion in mice exposed to AS...
December 2, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27900272/return-to-physical-activity-after-gastrocnemius-recession
#2
Camelia Tang Qian Ying, Sean Lai Wei Hong, Bing Howe Lee, Gowreeson Thevendran
AIM: To prospectively investigate the time taken and patients' ability to resume preoperative level of physical activity after gastrocnemius recession. METHODS: Endoscopic gastrocnemius recession (EGR) was performed on 48 feet in 46 consecutive sportspersons, with a minimum follow-up of 24 mo. The Halasi Ankle Activity Score was used to quantify the level of physical activity. Time taken to return to work and physical activity was recorded. Functional outcomes were evaluated using the short form 36 (SF-36), American Orthopedic Foot and Ankle Society (AOFAS) Hindfoot score and modified Olerud and Molander (O and M) scores respectively...
November 18, 2016: World Journal of Orthopedics
https://www.readbyqxmd.com/read/27890615/egr2-is-a-gonadotropin-induced-survival-factor-that-controls-the-expression-of-ier3-in-ovarian-granulosa-cells
#3
Hanyong Jin, Miae Won, Eunkyoung Shin, Hong-Man Kim, Kangseok Lee, Jeehyeon Bae
Pituitary gonadotropins are key hormones that orchestrate the growth and development of ovarian follicles. However, limited information is available on intra-ovarian factors that mediate the actions of gonadotropins. In this study, we identified that the early growth response 2 gene (EGR2) is a gonadotropin-inducible gene in granulosa cells of rats and humans. Analysis of consensus EGR-binding elements (EBEs) showed that the immediate early response 3 gene (IER3) is a novel transcriptional target gene of EGR2 as confirmed by the luciferase assay, electrophoretic mobility-shift assay (EMSA), chromatin immunoprecipitation (ChIP), and western blot analysis...
November 24, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27889530/identification-of-proximal-biomarkers-of-pkc-agonism-and-evaluation-of-their-role-in-hiv-reactivation
#4
Sai Vikram Vemula, Jill W Maxwell, Alexey Nefedov, Bang-Lin Wan, Justin Steve, William Newhard, Rosa I Sanchez, David Tellers, Richard J Barnard, Wade Blair, Daria Hazuda, Andrea L Webber, Bonnie J Howell
DESIGN: The HIV latent CD4(+) T cell reservoir is broadly recognized as a barrier to HIV cure. Induction of HIV expression using protein kinase C (PKC) agonists is one approach under investigation for reactivation of latently infected CD4(+) T cells (Beans et al., 2013; Abreu et al., 2014; Jiang et al., 2014; Jiang and Dandekar, 2015). We proposed that an increased understanding of the molecular mechanisms of action of PKC agonists was necessary to inform on biological signaling and pharmacodynamic biomarkers...
November 23, 2016: Antiviral Research
https://www.readbyqxmd.com/read/27888805/effects-of-abies-sibirica-terpenes-on-cancer-and-aging-associated-pathways-in-human-cells
#5
Anna Kudryavtseva, George Krasnov, Anastasiya Lipatova, Boris Alekseev, Faniya Maganova, Mikhail Shaposhnikov, Maria Fedorova, Anastasiya Snezhkina, Alexey Moskalev
A large number of terpenoids exhibit potential geroprotector and anti-cancer properties. Here, we studied whole transcriptomic effects of Abisil, the extract of fir (Abies sibirica) terpenes, on normal and cancer cell lines. We used early passaged and senescent none-immortalized fibroblasts as cellular aging models. It was revealed that in normal fibroblasts, terpenes induced genes of stress response, apoptosis regulation and tissue regeneration. The restoration of the expression level of some prolongevity genes after fir extract treatment was shown in old cells...
November 19, 2016: Oncotarget
https://www.readbyqxmd.com/read/27888751/remote-ischemic-preconditioning-attenuates-egr-1-expression-following-myocardial-ischemia-reperfusion-injury-through-activation-of-the-jak-stat-pathway
#6
H Mudaliar, B Rayner, M Billah, N Kapoor, W Lay, A Dona, R Bhindi
BACKGROUND/OBJECTIVES: Remote ischemic preconditioning (RIPC) protects the myocardium from ischemia/reperfusion (I/R) injury however the molecular pathways involved in cardioprotection are yet to be fully delineated. Transcription factor Early growth response-1 (Egr-1) is a key upstream activator in a variety of cardiovascular diseases. In this study, we elucidated the role of RIPC in modulating the regulation of Egr-1. METHODS: This study subjected rats to transient blockade of the left anterior descending (LAD) coronary artery with or without prior RIPC of the hind-limb muscle and thereafter excised the heart 24h following surgical intervention...
November 10, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27881080/genotypic-differences-in-intruder-evoked-immediate-early-gene-activation-in-male-but-not-female-vasopressin-1b-receptor-knockout-mice
#7
Shannah K Witchey, Erica L Stevenson, Heather K Caldwell
BACKGROUND: The neuropeptide arginine vasopressin (Avp) modulates social behaviors via its two centrally expressed receptors, the Avp 1a receptor and the Avp 1b receptor (Avpr1b). Recent work suggests that, at least in mice, Avp signaling through Avpr1b within the CA2 region of the hippocampus is critical for normal aggressive behaviors and social recognition memory. However, this brain area is just one part of a larger neural circuit that is likely to be impacted in Avpr1b knockout (-/-) mice...
November 24, 2016: BMC Neuroscience
https://www.readbyqxmd.com/read/27834104/upregulating-dab2ip-expression-via-egr-1-inhibition-a-new-approach-for-overcoming-fractionated-irradiation-induced-cross-tolerance-to-ionizing-radiation-and-mitomycin-c-in-tumor-cells
#8
Rulve Chang, Hui He, Guangmin Mao, Zhaolu Kong
PURPOSE: In this study, we evaluated the effect of fractionated irradiation (FI) on tumor cells sensitivity to ionizing radiation (IR) and antineoplastic drugs, and examined the potential of early growth response-1 (EGR-1) inhibition to sensitize tumor cells to IR. MATERIALS AND METHODS: PC3 and HepG2 cells were subjected to γ-rays at 2 Gy for ten times. Survived cells were named PC3/R and HepG2/R, respectively. Cells sensitivity to irradiation and chemotherapeutic drugs, including cisplatin (PT), doxorubicin (DOX), mitomycin C (MMC) and 5-fluorouracil (5-FU) were identified by colony formation assay and MMT method, respectively...
November 11, 2016: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/27815155/environmental-enrichment-protects-against-stress-induced-anxiety-role-of-glucocorticoid-receptor-erk-and-creb-signaling-in-the-basolateral-amygdala
#9
Leonardo S Novaes, Nilton Barreto Dos Santos, Rafaela F P Batalhote, Marília Brinati Malta, Rosana Camarini, Cristoforo Scavone, Carolina Demarchi Munhoz
Environmental enrichment (EE) is an experimental animal model that enhances an animal's opportunity to interact with sensory, motor, and social stimuli, compared to standard laboratory conditions. A prominent benefit of EE is the reduction of stress-induced anxiety. The relationship between stress and the onset of anxiety-like behavior has been widely investigated in experimental research, showing a clear correlation with structural changes in the hippocampus and basolateral amygdala (BLA). However, the mechanisms by which EE exerts its protective roles in stress and anxiety remain unclear, and it is not known whether EE reduces the effects of acute stress on animal behavior shortly following the cessation of stress...
November 1, 2016: Neuropharmacology
https://www.readbyqxmd.com/read/27798150/epigenetic-regulation-of-early-and-late-response-genes-in-acute-pancreatitis
#10
Juan Sandoval, Javier Pereda, Salvador Pérez, Isabela Finamor, Azahara Vallet-Sánchez, José Luis Rodríguez, Luis Franco, Juan Sastre, Gerardo López-Rodas
Chromatin remodeling seems to regulate the patterns of proinflammatory genes. Our aim was to provide new insights into the epigenetic mechanisms that control transcriptional activation of early- and late-response genes in initiation and development of severe acute pancreatitis as a model of acute inflammation. Chromatin changes were studied by chromatin immunoprecipitation analysis, nucleosome positioning, and determination of histone modifications in promoters of proinflammatory genes in vivo in the course of taurocholate-induced necrotizing pancreatitis in rats and in vitro in rat pancreatic AR42J acinar cells stimulated with taurocholate or TNF-α...
October 19, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27788851/the-hybrid-algorithm-for-treating-chronic%C3%A2-total-occlusions-in-europe-the-recharge-registry
#11
Joren Maeremans, Simon Walsh, Paul Knaapen, James C Spratt, Alexandre Avran, Colm G Hanratty, Benjamin Faurie, Pierfrancesco Agostoni, Erwan Bressollette, Peter Kayaert, Alan J Bagnall, Mohaned Egred, Dave Smith, Alexander Chase, Margaret B McEntegart, William H T Smith, Alun Harcombe, Paul Kelly, John Irving, Elliot J Smith, Julian W Strange, Joseph Dens
BACKGROUND: The hybrid algorithm for chronic total occlusion (CTO) percutaneous coronary intervention (PCI) was developed to improve procedural outcomes. Large, prospective studies validating the algorithm in a broad multicenter setting with operators of different experience levels are lacking. OBJECTIVES: The RECHARGE (REgistry of Crossboss and Hybrid procedures in FrAnce, the NetheRlands, BelGium and UnitEd Kingdom) registry aims to report achievable results using the hybrid algorithm...
November 1, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/27769893/phenylethanolamine-n-methyltransferase-gene-expression-in-adrenergic-neurons-of-spontaneously-hypertensive-rats
#12
Julie Grandbois, Sandhya Khurana, Kelly Graff, Phong Nguyen, Leah Meltz, T C Tai
Epinephrine is synthesised by the catecholamine biosynthetic enzyme, phenylethanolamine N-methyltransferase (PNMT), primarily in chromaffin cells of the adrenal medulla and secondarily in brainstem adrenergic neurons of the medulla oblongata. Epinephrine is an important neurotransmitter/neurohormone involved in cardiovascular regulation; however, overproduction is detrimental with negative outcomes such as cellular damage, cardiovascular dysfunction, and hypertension. Genetic mapping studies have linked elevated expression of PNMT to hypertension...
December 2, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27757700/agonistic-character-displacement-in-social-cognition-of-advertisement-signals
#13
Bret Pasch, Rachel Sanford, Steven M Phelps
Interspecific aggression between sibling species may enhance discrimination of competitors when recognition errors are costly, but proximate mechanisms mediating increased discriminative ability are unclear. We studied behavioral and neural mechanisms underlying responses to conspecific and heterospecific vocalizations in Alston's singing mouse (Scotinomys teguina), a species in which males sing to repel rivals. We performed playback experiments using males in allopatry and sympatry with a dominant heterospecific (Scotinomys xerampelinus) and examined song-evoked induction of egr-1 in the auditory system to examine how neural tuning modulates species-specific responses...
October 18, 2016: Animal Cognition
https://www.readbyqxmd.com/read/27752126/activated-factor-x-induces-endothelial-cell-senescence-through-igfbp-5
#14
Fumihiro Sanada, Yoshiaki Taniyama, Jun Muratsu, Rei Otsu, Masaaki Iwabayashi, Miguel Carracedo, Hiromi Rakugi, Ryuichi Morishita
Uncontrolled coagulation contributes to the pathophysiology of several chronic inflammatory diseases. In these conditions, senescent cells are often observed and is involved in the generation of inflammation. The coincidence of hyper-coagulation, cell senescence, and inflammation suggests the existence of a common underlying mechanism. Recent evidence indicates that activated coagulation factor X (FXa) plays a role in the processes beyond blood coagulation. This non-hematologic function entails the mediation of inflammation and tissue remodeling...
October 18, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27748819/src-tyrosine-kinase-mediates-endothelin-1-induced-early-growth-response-protein-1-expression-via-map-kinase-dependent-pathways-in-vascular-smooth-muscle-cells
#15
Estelle R Simo-Cheyou, George Vardatsikos, Ashok K Srivastava
We have previously demonstrated that the non-receptor protein tyrosine kinase (NR-PTK) c-Src is an upstream regulator of endothelin-1 (ET-1) and angiotensin II-induced activation of protein kinase B (PKB) signaling in vascular smooth muscle cells (VSMCs). We have also demonstrated that ET-1 potently induces the expression of the early growth response protein-1 (Egr-1), a zinc finger transcription factor that is overexpressed in models of vascular diseases, such as atherosclerosis. However, the involvement of c-Src in ET-1‑induced Egr-1 expression has not yet been investigated and its role in mitogen-activated protein kinase (MAPK) signaling remains controversial...
October 6, 2016: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/27730515/glucocorticoid-homeostasis-in-the-dentate-gyrus-is-essential-for-opiate-withdrawal-associated-memories
#16
Daniel García-Pérez, Szilamer Ferenczi, Krisztina J Kovács, M Luisa Laorden, M Victoria Milanés, Cristina Núñez
Drug-withdrawal-associated aversive memories might trigger relapse to drug-seeking behavior. However, changes in structural and synaptic plasticity, as well as epigenetic mechanisms, which may be critical for long-term aversive memory, have yet to be elucidated. We used male Wistar rats and performed conditioned-place aversion (CPA) paradigm to uncover the role of glucocorticoids (GCs) on plasticity-related processes that occur within the dentate gyrus (DG) during opiate-withdrawal conditioning (memory formation-consolidation) and after reactivation by re-exposure to the conditioned environment (memory retrieval)...
October 11, 2016: Molecular Neurobiology
https://www.readbyqxmd.com/read/27728875/different-contribution-of-glucocorticoids-in-the-basolateral-amygdala-to-the-formation-and-expression-of-opiate-withdrawal-associated-memories
#17
Daniel García-Pérez, Szilamer Ferenczi, Krisztina J Kovács, M Luisa Laorden, M Victoria Milanés, Cristina Núñez
Drug-withdrawal aversive memories generate a motivational state leading to compulsive drug taking, with plasticity changes in the basolateral amygdala (BLA) being essential in aversive motivational learning. The conditioned-place aversion (CPA) paradigm allows for measuring the negative affective component of drug withdrawal. First, CPA triggers association between negative affective consequences of withdrawal with context (memory consolidation). Afterwards, when the animals are re-exposed to the paired environment, they avoid it due to the association between the context and aversive memories (memory retrieval)...
September 28, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27717820/discovery-of-an-artificial-peptide-agonist-to-the-fibroblast-growth-factor-receptor-1c-%C3%AE-klotho-complex-from-random-peptide-t7-phage-display
#18
Kotaro Sakamoto, Yayoi Kawata, Yasushi Masuda, Tadashi Umemoto, Takashi Ito, Taiji Asami, Shiro Takekawa, Tetsuya Ohtaki, Hiroshi Inooka
Fibroblast growth factor receptor-1c (FGFR1c)/βKlotho (KLB) complex is a receptor of fibroblast growth factor 21 (FGF21). Pharmacologically, FGF21 shows anti-obesity and anti-diabetic effects upon peripheral administration. Here, we report the development of an artificial peptide agonist to the FGFR1c/KLB heterodimer complex. The peptide, F91-8A07 (LPGRTCREYPDLWWVRCY), was discovered from random peptide T7 phage display and selectively bound to the FGFR1c/KLB complex, but not to FGFR1c and KLB individually...
October 4, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27703009/epithelial-cholesterol-deficiency-attenuates-human-antigen-r-linked-pro-inflammatory-stimulation-via-an-srebp2-linked-circuit
#19
Seong-Hwan Park, Juil Kim, Mira Yu, Jae-Hong Park, Yong Sik Kim, Yuseok Moon
Patients with chronic intestinal ulcerative diseases, such as inflammatory bowel disease, tend to exhibit abnormal lipid profiles, which may affect the gut epithelial integrity. We hypothesized that epithelial cholesterol depletion may trigger inflammation-checking machinery via cholesterol sentinel signaling molecules whose disruption in patients may aggravate inflammation and disease progression. In the present study, sterol regulatory element-binding protein 2 (SREBP2) as the cholesterol sentinel was assessed for its involvement in the epithelial inflammatory responses in cholesterol-depleted enterocytes...
November 18, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27698846/expression-of-early-growth-response-gene-1-in-precancerous-lesions-of-gastric-cancer
#20
Seon-Young Park, Ji-Young Kim, Su-Mi Lee, Jin Ook Chung, Kyung-Hwa Lee, Chung-Hwan Jun, Chang-Hwan Park, Hyun-Soo Kim, Sung-Kyu Choi, Jong-Sun Rew, Young-Do Jung, Yong Han Lee
Several studies have demonstrated a correlation between the expression of early growth response gene-1 (EGR-1) and the progression of gastric cancers at advanced stages. However, the effects of EGR-1 expression on human gastric cancer progression, particularly on precancerous lesions, have not been investigated. In this study, we evaluate EGR-1 expression levels in target mucosa from patients with early gastric cancer and precancerous lesions, and assess whether EGR-1 expression affects the oncogenic phenotypes of human gastric cancer cells...
October 2016: Oncology Letters
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