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https://www.readbyqxmd.com/read/28440917/atf3-inhibits-the-inflammation-induced-by-mycoplasma-pneumonia-in-vitro-and-in-vivo
#1
Jing Wang, Wei Cheng, Zhen Wang, Lihong Xin, Wen Zhang
OBJECTIVES: Activating transcription factor-3 (ATF3) is a key regulator of inflammatory responses. We aimed to investigate the effects and mechanisms of ATF3 on the inflammatory cytokines are induced by Mycoplasma pneumonia (MP). STUDY DESIGN: RAW264.7 and mouse peritoneal macrophages were exposed to various time with or without MP infection (3, 6, 12, 24, and 48 h), and detect the expression of ATF3. Adenovirus-expression of ATF3 (Ad/ATF3) or Ad/βgal was transfected into cells which were exposed to MP for 48 h, RT-PCR and ELISA was used to evaluate the expression and secretion of TNF-α, IL-1β, IL-6, and IL-18...
April 25, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28414040/sars-coronavirus-papain-like-protease-up-regulates-the-collagen-expression-through-non-samd-tgf-%C3%AE-1-signaling
#2
Ching-Ying Wang, Chien-Yi Lu, Shih-Wen Li, Chien-Chen Lai, Chun-Hung Hua, Su-Hua Huang, Ying-Ju Lin, Mann-Jen Hour, Cheng-Wen Lin
SARS coronavirus (CoV) papain-like protease (PLpro) reportedly induced the production of TGF-β1 through p38 MAPK/STAT3-meidated Egr-1-dependent activation (Sci. Rep. 6, 25754). This study investigated the correlation of PLpro-induced TGF-β1 with the expression of Type I collagen in human lung epithelial cells and mouse pulmonary tissues. Specific inhibitors for TGF-βRI, p38 MAPK, MEK, and STAT3 proved that SARS-CoV PLpro induced TGF-β1-dependent up-regulation of Type I collagen in vitro and in vivo. Subcellular localization analysis of SMAD3 and SMAD7 indicated that non-SMAD pathways in TGF-β1 signaling involved in the production of Type I collagen in transfected cells with pSARS-PLpro...
April 13, 2017: Virus Research
https://www.readbyqxmd.com/read/28411025/klotho-down-regulates-egr-1-by-inhibiting-tgf-%C3%AE-1-smad3-signaling-in-high-glucose-treated-human-mesangial-cells
#3
Yang Li, Fang Hu, Meng Xue, Yi-Jie Jia, Zong-Ji Zheng, Ling Wang, Mei-Ping Guan, Yao-Ming Xue
Diabetic kidney disease (DKD) has become the leading cause of end-stage renal disease worldwide and is associated with glomerular mesangial cell (MC) proliferation and excessive extracellular matrix (ECM) production. Klotho can attenuate renal fibrosis in part by inhibiting TGF-β1/Smad3 signaling in DKD. Early growth response factor 1 (Egr-1) has been shown to play a key role in renal fibrosis in part by facilitating the formation of a positive feedback loop involving TGF-β1. However, whether Klotho down-regulates Egr-1 by inhibiting TGF-β1/Smad3 signaling in DKD is unclear...
April 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28391931/characterization-of-particulate-matter-from-diesel-passenger-cars-tested-on-chassis-dynamometers
#4
Sungwoon Jung, Jaehyun Lim, Sangil Kwon, Sangwoo Jeon, Jeongsoo Kim, Jongtae Lee, Sunmoon Kim
Emission characterization of particle number as well as particle mass from three diesel passenger cars equipped with diesel particulate filter (DPF), diesel oxidation catalyst (DOC) and exhaust gas recirculation (EGR) under the vehicle driving cycles and regulatory cycle. Total particle number emissions (PNEs) decreased gradually during speed-up of vehicle from 17.3 to 97.3km/hr. As the average vehicle speed increases, the size-segregated peak of particle number concentration shifts to smaller size ranges of particles...
April 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28378088/central-activation-of-the-a1-adenosine-receptor-in-fed-mice-recapitulates-only-some-of-the-attributes-of-daily-torpor
#5
Maria A Vicent, Ethan D Borre, Steven J Swoap
Mice enter bouts of daily torpor, drastically reducing metabolic rate, core body temperature (T b), and heart rate (HR), in response to reduced caloric intake. Because central adenosine activation has been shown to induce a torpor-like state in the arctic ground squirrel, and blocking the adenosine-1 (A1) receptor prevents daily torpor, we hypothesized that central activation of the A1 adenosine receptors would induce a bout of natural torpor in mice. To test the hypothesis, mice were subjected to four different hypothermia bouts: natural torpor, forced hypothermia (FH), isoflurane-anesthesia, and an intracerebroventricular injection of the selective A1 receptor agonist N(6-)cyclohexyladenosine (CHA)...
April 4, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28370894/antrodia-camphorata-attenuates-cigarette-smoke-induced-ros-production-dna-damage-apoptosis-and-inflammation-in-vascular-smooth-muscle-cells-and-atherosclerosis-in-apoe-deficient-mice
#6
Hsin-Ling Yang, Mallikarjuna Korivi, Cheng-Hsien Chen, Wei-Jung Peng, Chee-Shan Chen, Mei-Ling Li, Li-Sung Hsu, Jiunn-Wang Liao, You-Cheng Hseu
Cigarette smoke exposure activates several cellular mechanisms predisposing to atherosclerosis, including oxidative stress, dyslipidemia, and vascular inflammation. Antrodia camphorata, a renowned medicinal mushroom in Taiwan, has been investigated for its antioxidant, anti-inflammatory, and antiatherosclerotic properties in cigarette smoke extracts (CSE)-treated vascular smooth muscle cells (SMCs), and ApoE-deficient mice. Fermented culture broth of Antrodia camphorata (AC, 200-800 µg/mL) possesses effective antioxidant activity against CSE-induced ROS production...
April 3, 2017: Environmental Toxicology
https://www.readbyqxmd.com/read/28369888/early-growth-response-1-mediated-downregulation-of-drebrin-correlates-with-loss-of-dendritic-spines
#7
Chulmin Cho, Ryen MacDonald, Jijun Shang, Moon Jeong Cho, Lorraine E Chalifour, Hemant K Paudel
Postsynaptic dendritic spines are structurally composed of actin cytoskeleton, which undergoes dynamic morphological changes to accommodate incoming synaptic activity. Drebrin is an actin binding protein highly expressed in dendritic spines that serves an important role in regulating spine morphology. Functionally, loss of drebrin directly correlates with deficits in learning and memory, as is the case observed in Alzheimer's disease. Despite these findings, the regulatory factor responsible for drebrin loss remains unclear...
March 31, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28322869/scaffold-free-high-throughput-generation-of-quiescent-valvular-microtissues
#8
Annelies Roosens, Inès Puype, Ria Cornelissen
AIMS: The major challenge of working with valvular interstitial cells in vitro is the preservation or recovery of their native quiescent state. In this study, a biomimetic approach is used which aims to engineer small volume, high quality valve microtissues, having a potential in regenerative medicine and as a relevant 3D in vitro model to provide insights into valve (patho)biology. METHODS AND RESULTS: To form micro-aggregates, porcine valvular interstitial cells were seeded in agarose micro-wells and cultured in medium supplemented with 250μM Ascorbic Acid 2-phosphate for 22days...
March 18, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28321979/effect-of-the-early-social-environment-on-behavioural-and-genomic-responses-to-a-social-challenge-in-a-cooperatively-breeding-vertebrate
#9
Cecilia Nyman, Stefan Fischer, Nadia Aubin-Horth, Barbara Taborsky
The early social environment can have substantial, lifelong effects on vertebrate social behaviour, which can be mediated by developmental plasticity of brain gene expression. Early-life effects can influence immediate behavioural responses towards later-life social challenges and can activate different gene expression responses. However, while genomic responses to social challenges have been reported frequently, how developmental experience influences the shape of these genomic reaction norms remains largely unexplored...
March 21, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28317936/priming-of-transcriptional-memory-responses-via-the-chromatin-accessibility-landscape-in-t-cells
#10
Wen Juan Tu, Kristine Hardy, Christopher R Sutton, Robert McCuaig, Jasmine Li, Jenny Dunn, Abel Tan, Vedran Brezar, Melanie Morris, Gareth Denyer, Sau Kuen Lee, Stephen J Turner, Nabila Seddiki, Corey Smith, Rajiv Khanna, Sudha Rao
Memory T cells exhibit transcriptional memory and "remember" their previous pathogenic encounter to increase transcription on re-infection. However, how this transcriptional priming response is regulated is unknown. Here we performed global FAIRE-seq profiling of chromatin accessibility in a human T cell transcriptional memory model. Primary activation induced persistent accessibility changes, and secondary activation induced secondary-specific opening of previously less accessible regions associated with enhanced expression of memory-responsive genes...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28296045/one-year-outcomes-after-successful-chronic-total-occlusion-percutaneous-coronary-intervention
#11
W M Wilson, S J Walsh, A Bagnall, A T Yan, C G Hanratty, M Egred, E Smith, K G Oldroyd, M McEntegart, J Irving, H Douglas, J Strange, J C Spratt
We aimed to determine clinical outcomes 1 year after successful chronic total occlusion (CTO) PCI and, in particular, whether use of dissection and re-entry strategies affects clinical outcomes. Hybrid approaches have increased the procedural success of CTO percutaneous coronary intervention (PCI) but longer-term outcomes are unknown, particularly in relation to dissection and re-entry techniques. Data were collected for consecutive CTO PCIs performed by hybrid-trained operators from 7 United Kingdom (UK) centres between 2012 and 2014...
March 15, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28286204/long-term-acetaminophen-treatment-induced-liver-fibrosis-in-mice-and-the-involvement-of-egr-1
#12
Qingyun Bai, Hongyu Yan, Yuchen Sheng, Yao Jin, Liang Shi, Lili Ji, Zhengtao Wang
Acetaminophen (APAP)-induced acute liver injury has already been well studied. However, whether long-term administration of APAP will cause liver fibrosis is still not very clear. This study aims to investigate the liver fibrosis in mice induced by long-term APAP treatment and the involvement of early growth response 1 (Egr-1). C57BL/6 mice were orally given with APAP (200, 300mg/kg) for 2, 6 or 10 weeks, respectively. Liver hydroxyproline content, collagen deposition and inflammatory cells infiltration were increased in mice treated with APAP (200, 300mg/kg) for 6 or 10 weeks...
March 9, 2017: Toxicology
https://www.readbyqxmd.com/read/28282643/nab2-maintains-thymus-cellularity-with-aging-and-stress
#13
K Taraszka Hastings, Diana Elizalde, Leela Muppana, Sarah Levine, Christy M Kamel, Wendy M Ingram, Jennifer T Kirkpatrick, Chengcheng Hu, Matthew P Rausch, Amelia L Gallitano
Thymic cellularity is influenced by a variety of biological and environmental factors, such as age and stress; however, little is known about the molecular genetic mechanisms that regulate this process. Immediate early genes of the Early growth response (Egr) family have critical roles in immune function and response to environmental stress. The transcription factors, Egr1, Egr2 and Egr3, play roles in the thymus and in peripheral T-cell activation. Nab2, which binds Egrs 1, 2, and 3 as a co-regulator of transcription, also regulates peripheral T-cell activation...
May 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28275114/binding-and-inhibition-of-the-ternary-complex-factor-elk-4-sap1-by-the-adapter-protein-dok-4
#14
Erika Hooker, Cindy Baldwin, Victoria Roodman, Anupam Batra, Naajia Nur Isa, Tomoko Takano, Serge Lemay
The adapter protein Dok-4 (downstream of kinase-4) has been reported as both an activator and inhibitor of Erk and Elk-1, but lack of knowledge about the identity of its partner molecules has precluded any mechanistic insight into these seemingly conflicting properties. We report that Dok-4 interacts with the transactivation domain of Elk-4 through an atypical phosphotyrosine-binding domain-mediated interaction. Dok-4 possesses a nuclear export signal and can relocalize Elk-4 from nucleus to cytosol, whereas Elk-4 possesses two nuclear localization signals that restrict interaction with Dok-4...
April 19, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28269757/correlations-of-the-expressions-of-c-jun-and-egr-1-proteins-with-clinicopathological-features-and-prognosis-of-patients-with-nasopharyngeal-carcinoma
#15
Jia-Teng Zhong, Hai-Jun Wang, Jian Yu, Jing-Hang Zhang, Shi-Feng Wang, Xue Yang, Wei Su
This study intended to explore the correlation of the expressions of c-Jun and Egr-1 proteins with clinicopathological features and prognosis of patients with nasopharyngeal carcinoma (NPC). From January 2008 to January 2011, 123 NPC patients and 59 patients with chronic rhinitis were enrolled in this study. Fresh NPC and normal nasopharynx tissue specimens were obtained during surgery. Immunohistochemistry (IHC) was adopted to determine the positive expressions of the c-Jun and Egr-1 proteins. A 5-year clinical follow-up was conducted on all NPC patients...
February 27, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/28243112/induction-of-pd-l1-expression-by-epidermal-growth-factor-receptor-mediated-signaling-in-esophageal-squamous-cell-carcinoma
#16
Wencheng Zhang, Qingsong Pang, Cihui Yan, Qifeng Wang, Jingsong Yang, Shufei Yu, Xiao Liu, Zhiyong Yuan, Ping Wang, Zefen Xiao
PURPOSE: The purpose of this study was to investigate the potential effect of activation of epidermal growth factor receptor (EGFR) signaling pathway on the expression of programmed death-ligand 1 (PD-L1) in esophageal squamous cell carcinoma (ESCC) cells with EGFR overexpression. METHODS: Flow cytometry and Western blot methods were used to assess PD-L1 expression on ESCC cells when EGFR signaling pathway was activated by epidermal growth factor (EGF) with or without EGFR-specific inhibitor AG-1478, and then EGFR signaling array was applied to analyze the potential signaling pathways involved...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28228068/stress-in-gastrointestinal-tract-and-stable-gastric-pentadecapeptide-bpc-157-finally-do-we-have-a-solution
#17
Predrag Sikiric, Sven Seiwerth, Rudolf Rucman, Domagoj Drmic, Mirjana Stupnisek, Antonio Kokot, Marko Sever, Ivan Zoricic, Zoran Zoricic, Lovorka Batelja, Tihomil Ziger, Josipa Vlainic, Zarko Rasic, Martina Lovric Bencic
Selye's syndrome produced by diverse nocuous agents and "response to damage as such" means Selye's stress triad in stress coping response to reestablish homeostasis. Logically, from the gastrointestinal tract viewpoint, such organoprotective/healing response implies the angiogenic growth factors that commonly signify the healing. Thereby, the gastric pentadecapeptide BPC 157-organoprotection (huge range of beneficial effects) signifies the Selye's stress concept/stress coping response implemented in and from gastrointestinal tract, and BPC 157 as an integrative mediator that integrates the adaptive bodily response to stress...
February 20, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28207303/growth-of-listeria-monocytogenes-in-thawed-frozen-foods
#18
Ai Kataoka, Hua Wang, Philip H Elliott, Richard C Whiting, Melinda M Hayman
The growth characteristics of Listeria monocytogenes inoculated onto frozen foods (corn, green peas, crabmeat, and shrimp) and thawed by being stored at 4, 8, 12, and 20°C were investigated. The growth parameters, lag-phase duration (LPD) and exponential growth rate (EGR), were determined by using a two-phase linear growth model as a primary model and a square root model for EGR and a quadratic model for LPD as secondary models, based on the growth data. The EGR model predictions were compared with growth rates obtained from the USDA Pathogen Modeling Program, calculated with similar pH, salt percentage, and NaNO2 parameters, at all storage temperatures...
February 16, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28202416/microarray-analysis-of-macrophage-response-to-infection-with-streptococcus-oralis-reveals-the-immunosuppressive-effect-of-hydrogen-peroxide
#19
Hitomi Matsushima, Yutaro Kumagai, Alexis Vandenbon, Hideo Kataoka, Miki Kadena, Haruka Fukamachi, Takafumi Arimoto, Hirobumi Morisaki, Nagatoshi Fujiwara, Nobuo Okahashi, Hirotaka Kuwata
Oral streptococci including mitis group streptococci are commensal residents and are also the first to colonize the oral cavity. However, various species of these oral streptococci have the potential to invade the host and occasionally lead to severe infectious disease such as cardiovascular diseases. Oral streptococci have close interactions with the host immune system including macrophages at the oral mucosal surface. One notable common trait of oral streptococcus including Streptococcus oralis (S. oralis) is the production of hydrogen peroxide (H2O2)...
April 1, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28187447/egr-1-and-rna-pol-ii-facilitate-glioma-cell-gdnf-transcription-induced-by-histone-hyperacetylation-in-promoter-ii
#20
Bao-Le Zhang, Ting-Wen Guo, Le-Le Gao, Guang-Quan Ji, Xiao-He Gu, Yu-Qi Shao, Rui-Qin Yao, Dian-Shuai Gao
The specific mechanisms for epigenetic regulation of gene transcription remain to be elucidated. We previously demonstrated that hyperacetylation of histone H3K9 in promoter II of glioma cells promotes high transcription of the glial cell line-derived neurotrophic factor (GDNF) gene. This hyperacetylation significantly enhanced Egr-1 binding and increased the recruitment of RNA polymerase II (RNA POL II) to that region (P < 0.05). Egr-1 expression was abnormally increased in C6 glioma cells. Further overexpression of Egr-1 significantly increased Egr-1 binding to GDNF promoter II, while increasing RNA POL II recruitment, thus increasing GDNF transcription (P < 0...
February 6, 2017: Oncotarget
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