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https://www.readbyqxmd.com/read/29787794/early-growth-response-gene-1-is-essential-for-urban-particulate-matter-induced-inflammation-and-mucus-hyperproduction-in-airway-epithelium
#1
Feng Xu, Jiaofei Cao, Man Luo, Luanqing Che, Wen Li, Songmin Ying, Zhihua Chen, Huahao Shen
Particulate matter (PM) has been implicated as a risk factor for human airway disorders. However, the biological mechanisms underlying the correlation between PM exposure and adverse airway effects have not yet been fully clarified. The objective of this study was to explore the possible role of early growth response gene 1 (Egr-1) in PM-induced toxic effects in pulmonary inflammation and mucus hyperproduction in vitro and in vivo. Particulate matter exposure induced a rapid Egr-1 expression in human bronchial epithelial (HBE) cells and in mouse lungs...
May 19, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29737506/hiv-1-protein-tat-1-72-impairs-neuronal-dendrites-via-activation-of-pp1-and-regulation-of-the-creb-bdnf-pathway
#2
Yu Liu, Deyu Zhou, Jiabin Feng, Zhou Liu, Yue Hu, Chang Liu, Xiaohong Kong
Despite the success of combined antiretroviral therapy in recent years, the prevalence of human immunodeficiency virus (HIV)-associated neurocognitive disorders in people living with HIV-1 is increasing, significantly reducing the health-related quality of their lives. Although neurons cannot be infected by HIV-1, shed viral proteins such as transactivator of transcription (Tat) can cause dendritic damage. However, the detailed molecular mechanism of Tat-induced neuronal impairment remains unknown. In this study, we first showed that recombinant Tat (1-72 aa) induced neurotoxicity in primary cultured mouse neurons...
May 8, 2018: Virologica Sinica
https://www.readbyqxmd.com/read/29722565/mmp-12-activates-protease-activated-receptor-par-1-upregulates-placenta-growth-factor-and-leads-to-pulmonary-emphysema
#3
Hsin-Han Hou, Hao-Chien Wang, Shih-Lung Cheng, Yen-Fu Chen, Kai-Zen Lu, Chong-Jen Yu
Due to the expansion of aging and smoking populations, chronic pulmonary obstructive disease (COPD) is predicted to be the third leading cause of death worldwide in 2030. It is therefore pertinent to develop effective therapy to improve management for COPD. Cigarette smoke-mediated protease-antiprotease imbalance is a major pathogenic mechanism for COPD and results in massive pulmonary infiltration of neutrophils and macrophages, releasing excessive neutrophil elastase (NE) and matrix metalloproteinases (MMPs)...
May 3, 2018: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29674380/odor-discrimination-learning-in-the-indian-greater-short-nosed-fruit-bat-cynopterus-sphinx-differential-expression-of-egr-1-c-fos-and-pp-1-in-the-olfactory-bulb-amygdala-and-hippocampus
#4
Murugan Mukilan, Wieslaw Bogdanowicz, Ganapathy Marimuthu, Koilmani Emmanuvel Rajan
Activity-dependent expression of immediate-early genes (IEGs) is induced by exposure to odor. The present study was designed to investigate whether there is differential expression of IEGs ( Egr-1 , C-fos ) in the brain region mediating olfactory memory in the Indian greater short-nosed fruit bat Cynopterus sphinx We assumed that differential expression of IEGs in different brain regions may orchestrate a preference odor (PO) and aversive odor (AO) memory in C. sphinx We used preferred (0.8% wt/wt of cinnamon powder) and aversive (0...
April 19, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29601855/egr-1-expression-in-catecholamine-synthesizing-neurons-reflects-auditory-learning-and-correlates-with-responses-in-auditory-processing-areas
#5
Jennifer B Dai, Yining Chen, Jon T Sakata
Distinguishing between familiar and unfamiliar individuals is an important task that shapes the expression of social behavior. As such, identifying the neural populations involved in processing and learning the sensory attributes of individuals is important for understanding mechanisms of behavior. Catecholamine-synthesizing neurons have been implicated in sensory processing, but relatively little is known about their contribution to auditory learning and processing across various vertebrate taxa. Here we investigated the extent to which immediate early gene expression in catecholaminergic circuitry reflects information about the familiarity of social signals and predicts immediate early gene expression in sensory processing areas in songbirds...
March 27, 2018: Neuroscience
https://www.readbyqxmd.com/read/29579710/bu-shen-zhu-yun-decoction-promotes-synthesis-and-secretion-of-fsh%C3%AE-and-lh%C3%AE-in-anterior-pituitary-cells-in-vitro
#6
Xiaofei Jiang, Huifang Zhou, Mingqing Shi, Boru Zhou, Bei Liu, Yizhen Yuan, Jinjun Shan, Jianya Xu, Tong Xie
Luteal phase defects (LPD) are an important etiology of infertility which has increased in recent years. Studies have shown that bu-shen-zhu-yun decoction (BSZY-D) can lower the expression of estrogen receptor and progesterone receptor, in rats endometrium of embryonic implantation period, which upregulated by mifepristone, and improve uterine receptivity. The aim of present study was to determine the effect of BSZY-D on the synthesis and secretion of gonadotropic hormones in the anterior pituitary cells of rats...
June 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29561772/the-host-factor-early-growth-response-gene-egr-1-regulates-vaccinia-virus-infectivity-during-infection-of-starved-mouse-cells
#7
Leonardo C de Oliveira, Bruno S A F Brasil, Bethany Unger, Giliane S Trindade, Jonatas S Abrahão, Erna G Kroon, Paula Traktman, Cláudio A Bonjardim
Evolution has equipped poxvirus genomes with the coding capacity for several virus-host interaction products which interfere with host cell gene expression and protein function, creating an adequate intracellular environment for a productive infection. We show here that Vaccinia virus (VACV) induces the expression of the cellular transcription factor EGR-1 (early growth response-1) in Mouse Embryonic Fibroblasts (MEFs) through the MEK (mitogen-activated protein kinase (MAPK)/ERK)/ERK (extracellular signal-regulated kinases) pathway, from 3 to 12 h post infection (h...
March 21, 2018: Viruses
https://www.readbyqxmd.com/read/29543533/early-growth-response-1-negative-feedback-regulates-skeletal-muscle-postprandial-insulin-sensitivity-via-activating-ptp1b-transcription
#8
Jing Wu, Wei-Wei Tao, Dan-Yang Chong, Shan-Shan Lai, Chuang Wang, Qi Liu, Tong-Yu Zhang, Bin Xue, Chao-Jun Li
Postprandial insulin desensitization plays a critical role in maintaining whole-body glucose homeostasis by avoiding the excessive absorption of blood glucose; however, the detailed mechanisms that underlie how the major player, skeletal muscle, desensitizes insulin action remain to be elucidated. Herein, we report that early growth response gene-1 ( Egr-1) is activated by insulin in skeletal muscle and provides feedback inhibition that regulates insulin sensitivity after a meal. The inhibition of the transcriptional activity of Egr-1 enhanced the phosphorylation of the insulin receptor (InsR) and Akt, thus increasing glucose uptake in L6 myotubes after insulin stimulation, whereas overexpression of Egr-1 decreased insulin sensitivity...
March 15, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29520172/fluvastatin-inhibits-advanced-glycation-end-products-induced-proliferation-migration-and-extracellular-matrix-accumulation-in-vascular-smooth-muscle-cells-by-targeting-connective-tissue-growth-factor
#9
Ae-Rang Hwang, Ju-Ock Nam, Young Jin Kang
Connective tissue growth factor (CTGF) is a novel fibrotic mediator, which is considered to mediate fibrosis through extracellular matrix (ECM) synthesis in diabetic cardiovascular complications. Statins have significant immunomodulatory effects and reduce vascular injury. We therefore examined whether fluvastatin has anti-fibrotic effects in vascular smooth muscle cells (VSMCs) and elucidated its putative transduction signals. We show that advanced glycation end products (AGEs) stimulated CTGF mRNA and protein expression in a time-dependent manner...
March 2018: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/29518540/regulation-of-the-voltage-gated-ca-2-channel-ca-v-%C3%AE-2-%C3%AE-1-subunit-expression-by-the-transcription-factor-egr-1
#10
Ricardo González-Ramírez, Elizabeth Martínez-Hernández, Alejandro Sandoval, Kimberly Gómez-Mora, Ricardo Felix
It is well known that the CaV α2 δ auxiliary subunit regulates the density of high voltage-activated Ca2+ channels in the plasma membrane and that alterations in their functional expression might have implications in the pathophysiology of diverse human diseases such as neuropathic pain. However, little is known concerning the transcriptional regulation of this protein. We previously characterized the promoter of CaV α2 δ, and here we report its regulation by the transcription factor Egr-1. Using the neuroblastoma N1E-115 cells, we found that Egr-1 interacts specifically with its binding site in the promoter, affecting the transcriptional regulation of CaV α2 δ...
April 23, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29513566/reactive-oxygen-species-up-regulate-expression-of-muscle-atrophy-associated-ubiquitin-ligase-cbl-b-in-rat-l6-skeletal-muscle-cells
#11
Takayuki Uchida, Yoshihiro Sakashita, Kanako Kitahata, Yui Yamashita, Chisato Tomida, Yuki Kimori, Akio Komatsu, Katsuya Hirasaka, Ayako Ohno, Reiko Nakao, Atsushi Higashitani, Akira Higashibata, Noriaki Ishioka, Toru Shimazu, Takeshi Kobayashi, Yuushi Okumura, Inho Choi, Motoko Oarada, Edward M Mills, Shigetada Teshima-Kondo, Shin'ichi Takeda, Eiji Tanaka, Keiji Tanaka, Masahiro Sokabe, Takeshi Nikawa
Unloading-mediated muscle atrophy is associated with increased reactive oxygen species (ROS) production. We previously demonstrated that elevated ubiquitin ligase casitas B-lineage lymphoma-b (Cbl-b) resulted in the loss of muscle volume [Nakao R. et al. Mol Cell Biol, 29: 4798-4811, 2009]. However, the pathological role of ROS production associated with unloading-mediated muscle atrophy still remains unknown. Here, we showed the ROS-mediated signal transduction caused by microgravity or its simulation contributes to Cbl-b expression...
March 7, 2018: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/29496477/activation-of-immediate-early-genes-by-nicotine-after-chronic-neonatal-nicotine-exposure-in-brain-areas-involved-in-stress-and-anxiety-responses
#12
Amal A Halawa, Joanne C Damborsky, G Simona Slaton, Ursula H Winzer-Serhan
Maternal smoking has negative long-term consequences on affective behaviors, and in rodents, chronic neonatal nicotine exposure (CNN) results in increased anxiety. In rat pups, acute nicotine stimulation activates brain regions associated with stress and anxiety, but chronic nicotine exposure could desensitize of nicotinic acetylcholine receptors, the molecular target of nicotine. Here, we determined whether CNN affected neuronal activation by an acute nicotine challenge. Using in situ hybridization, we analyzed mRNA expression of the immediate-early genes (IEGs) c-Fos, Arc, Egr-1 and Npas4, which are markers for neuronal activation and implicated in synaptic plasticity...
May 15, 2018: Brain Research
https://www.readbyqxmd.com/read/29490938/lipoxins-regulate-the-early-growth-response-1-network-and-reverse-diabetic-kidney-disease
#13
Eoin P Brennan, Muthukumar Mohan, Aaron McClelland, Christos Tikellis, Mark Ziemann, Antony Kaspi, Stephen P Gray, Raelene Pickering, Sih Min Tan, Syed Tasadaque Ali-Shah, Patrick J Guiry, Assam El-Osta, Karin Jandeleit-Dahm, Mark E Cooper, Catherine Godson, Phillip Kantharidis
Background The failure of spontaneous resolution underlies chronic inflammatory conditions, including microvascular complications of diabetes such as diabetic kidney disease. The identification of endogenously generated molecules that promote the physiologic resolution of inflammation suggests that these bioactions may have therapeutic potential in the context of chronic inflammation. Lipoxins (LXs) are lipid mediators that promote the resolution of inflammation. Methods We investigated the potential of LXA4 and a synthetic LX analog (Benzo-LXA4 ) as therapeutics in a murine model of diabetic kidney disease, ApoE-/- mice treated with streptozotocin...
May 2018: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29486207/nachrs-erk1-2-egr-1-signaling-participates-in-the-developmental-toxicity-of-nicotine-by-epigenetically-down-regulating-placental-11%C3%AE-hsd2
#14
Jin Zhou, Fulin Liu, Luting Yu, Dan Xu, Bin Li, Guohui Zhang, Wen Huang, Lu Li, Yuanzhen Zhang, Wei Zhang, Hui Wang
Impaired placental 11β-hydroxysteroid dehydrogenase type 2 (11β-HSD2) activity which inactivates maternal glucocorticoids is associated with poor fetal growth and a higher risk of chronic diseases in adulthood. This study aimed to elucidate the epigenetically regulatory mechanism of nicotine on placental 11β-HSD2 expression. Pregnant Wistar rats were administered 1.0 mg/kg nicotine subcutaneously twice a day from gestational day 9 to 20. The results showed that prenatal nicotine exposure increased corticosterone levels in the placenta and fetal serum, disrupted placental morphology and endocrine function, and reduced fetal bodyweight...
April 1, 2018: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29481791/egr-1-mediated-cardiac-mir-99-family-expression-diverges-physiological-hypertrophy-from-pathological-hypertrophy
#15
Subbiah Ramasamy, Ganesan Velmurugan, Balakrishnan Rekha, Sivakumar Anusha, K Shanmugha Rajan, Suresh Shanmugarajan, Tharmarajan Ramprasath, Pandi Gopal, Dhanendra Tomar, Karuppusamy V Karthik, Suresh Kumar Verma, Venkata Naga Srikanth Garikipati, Rajan Sudarsan
The physiological cardiac hypertrophy is an adaptive condition without myocyte cell death, while pathological hypertrophy is a maladaptive condition associated with myocyte cell death. This study explores the miRNome of α-2M-induced physiologically hypertrophied cardiomyocytes and the role of miRNA-99 family during cardiac hypertrophy. Physiological and pathological cardiac hypertrophy was induced in H9c2 cardiomyoblast cell lines using α-2M and isoproterenol respectively. Total RNA isolation and small RNA sequencing were executed for physiological hypertrophy model...
April 1, 2018: Experimental Cell Research
https://www.readbyqxmd.com/read/29468740/neuroprotective-effects-of-20-s-protopanaxatriol-ppt-on-scopolamine-induced-cognitive-deficits-in-mice
#16
Cong Lu, Jingwei Lv, Liming Dong, Ning Jiang, Yan Wang, Qiong Wang, Yinghui Li, Shanguang Chen, Bei Fan, Fengzhong Wang, Xinmin Liu
20(S)-protopanaxatriol (PPT), one of the ginsenosides from Panax ginseng, has been reported to have neuroprotective effects and to improve memory. The present study was designed to investigate the protective effect of PPT on scopolamine-induced cognitive deficits in mice. Male Institute of Cancer Research mice were pretreated with 2 different doses of PPT (20 and 40 μmol/kg) for 27 days by intraperitoneal injection, and scopolamine (0.75 mg/kg) was injected intraperitoneally for 9 days to induce memory impairment...
February 22, 2018: Phytotherapy Research: PTR
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
#17
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 foot-shock are separated by 24 h. 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; Schreiber, Asok, Jablonski, Rosen, & Stanton, 2014; Chakraborty, Asok, Stanton, & Rosen, 2016)...
April 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
#18
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
#19
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...
May 2018: Cellular Signalling
https://www.readbyqxmd.com/read/29386366/evolutionary-conserved-neural-signature-of-early-life-stress-affects-animal-social-competence
#20
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
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