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https://www.readbyqxmd.com/read/29322921/tensor-decomposition-based-unsupervised-feature-extraction-identifies-candidate-genes-that-induce-post-traumatic-stress-disorder-mediated-heart-diseases
#1
Y-H Taguchi
BACKGROUND: Although post-traumatic stress disorder (PTSD) is primarily a mental disorder, it can cause additional symptoms that do not seem to be directly related to the central nervous system, which PTSD is assumed to directly affect. PTSD-mediated heart diseases are some of such secondary disorders. In spite of the significant correlations between PTSD and heart diseases, spatial separation between the heart and brain (where PTSD is primarily active) prevents researchers from elucidating the mechanisms that bridge the two disorders...
December 21, 2017: BMC Medical Genomics
https://www.readbyqxmd.com/read/29298863/dual-regulation-of-hmgb1-by-combined-jnk1-2-atf2-axis-with-mir-200-family-in-nonalcoholic-steatohepatitis-in-mice
#2
Xin Chen, Yan Ling, Yanping Wei, Jing Tang, Yibing Ren, Baohua Zhang, Feng Jiang, Hengyu Li, Ruoyu Wang, Wen Wen, Guishuai Lv, Mengchao Wu, Lei Chen, Liang Li, Hongyang Wang
In the context of diabetes, obesity, and metabolic syndrome, the inflammatory signaling has critical roles in the pathogenesis of nonalcoholic fatty liver disease (NAFLD), but the underlying mechanisms remain poorly delineated. Herein, early and persistently elevated, proinflammatory cytokine HMGB1 expression was detected in a high-fat diet (HFD)-induced NAFLD model in C57BL/6 mice. The expression and extracellular release of HMGB1 was rapidly and dramatically induced by saturated palmitic acid in vitro HFD-induced inflammatory response and liver function impairment were both mitigated after the inhibition of endogenous HMGB1 by neutralizing antibody in vivo The up-regulation of HMGB1 was thought to be modified by dual channels: in the transcriptional level, it was regulated by JNK1/JNK2-ATF2 axis; post-transcriptionally, it was regulated by the microRNA (miR)-200 family, especially miR-429...
January 3, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29247845/strategies-of-biochemical-adaptation-for-hibernation-in-a-south-american-marsupial-dromiciops-gliroides-1-mitogen-activated-protein-kinases-and-the-cell-stress-response
#3
Sanoji Wijenayake, Bryan E Luu, Jing Zhang, Shannon N Tessier, Julian F Quintero-Galvis, Juan Diego Gaitán-Espitia, Roberto F Nespolo, Kenneth B Storey
Hibernation is a period of torpor and heterothermy that is typically associated with a strong reduction in metabolic rate, global suppression of transcription and translation, and upregulation of various genes/proteins that are central to the cellular stress response such as protein kinases, antioxidants, and heat shock proteins. The current study examined cell signaling cascades in hibernating monito del monte, Dromiciops gliroides, a South American marsupial of the Order Microbiotheria. Responses to hibernation by members of the mitogen-activated protein kinase (MAPK) pathways, and their roles in coordinating hibernator metabolism were examined in liver, kidney, heart and brain of control and versus hibernating (4days continuous torpor) D...
December 13, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/29203528/elevated-sodium-chloride-drives-type-i-interferon-signaling-in-macrophages-and-increases-antiviral-resistance
#4
Wu-Chang Zhang, Lin-Juan Du, Xiao-Jun Zheng, Xiao-Qing Chen, Chaoji Shi, Bo-Yan Chen, Xue-Nan Sun, Chao Li, Yu-Yao Zhang, Yan Liu, Hui Xiao, Qibin Leng, Xinquan Jiang, Zhiyuan Zhang, Shuyang Sun, Sheng-Zhong Duan
Type I IFN production and signaling in macrophages play critical roles in innate immune responses. High salt (i.e. high concentrations of NaCl) has been proposed to be an important environmental factor that influences immune responses in multiple ways. However, it remains unknown whether high salt regulates type I IFN production and signaling in macrophages. Here, we demonstrated that high salt promoted IFNβ production and its signaling in both human and mouse macrophages, and consequentially primed macrophages for strengthened immune sensing and signaling when challenged with viruses or viral nucleic acid analogues...
December 4, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29187900/the-cytotoxic-effects-of-dimethyl-sulfoxide-in-mouse-preimplantation-embryos-a-mechanistic-study
#5
Min-Hee Kang, Joydeep Das, Sangiliyandi Gurunathan, Hwan-Woo Park, Hyuk Song, Chankyu Park, Jin-Hoi Kim
Rationale: Dimethyl sulfoxide (DMSO) is commonly used as a solvent for water-insoluble substances, a vehicle for drug therapy, and a cryoprotectant for cultured cells. DMSO induced embryonic defects and its mechanism of action remains unclear. The rationale is based on the assumption that DMSO supplementation should induce long-term negative effects on both pre- and post-implantation embryo development. Methods: DMSO induced oxidative stress, ER stress, autophagy, mitophagy, signaling responsible genes and proteins were determined by RT-qPCR, Western blotting, immunofluorescence, and confocal microscopy...
2017: Theranostics
https://www.readbyqxmd.com/read/29178939/autocrine-parathyroid-hormone-like-hormone-promotes-intrahepatic-cholangiocarcinoma-cell-proliferation-via-increased-erk-jnk-atf2-cyclind1-signaling
#6
Jing Tang, Yan Liao, Shuying He, Jie Shi, Liang Peng, Xiaoping Xu, Fang Xie, Na Diao, Jinlan Huang, Qian Xie, Chuang Lin, Xiaoying Luo, Kaili Liao, Juanjuan Ma, Jingyi Li, Daichao Zhou, Zhijun Li, Jun Xu, Chao Zhong, Guozhen Wang, Lan Bai
BACKGROUND AND AIMS: Intrahepatic cholangiocarcinoma (ICC) is an aggressive tumor with a high fatality rate. It was recently found that parathyroid hormone-like hormone (PTHLH) was frequently overexpressed in ICC compared with non-tumor tissue. This study aimed to elucidate the underlying mechanisms of PTHLH in ICC development. METHODS: The CCK-8 assay, colony formation assays, flow cytometry and a xenograft model were used to examine the role of PTHLH in ICC cells proliferation...
November 25, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29152770/cytoplasmic-localization-of-the-cell-polarity-factor-scribble-supports-liver-tumor-formation-and-tumor-cell-invasiveness
#7
Shan Wan, Anne-Sophie Meyer, Sofia Maria Elisabeth Weiler, Christian Rupp, Marcell Tóth, Carsten Sticht, Stephan Singer, Stefan Thomann, Stephanie Roessler, Marina Schorpp-Kistner, Jennifer Schmitt, Norbert Gretz, Peter Angel, Darjus Felix Tschaharganeh, Jens Marquardt, Peter Schirmacher, Federico Pinna, Kai Breuhahn
The loss of epithelial cell polarity plays an important role in the development and progression of liver cancer. However, the specific molecular mechanisms supporting tumor initiation and progression are poorly understood. In this study, transcriptome data and immunofluorescence stains of tissue samples derived from hepatocellular carcinoma (HCC) patients revealed that overexpression associated with cytoplasmic localization of the baso-lateral cell polarity complex protein Scribble (Scrib) correlated with poor prognosis of HCC patients...
November 20, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29147607/immune-signature-profiling-identified-predictive-and-prognostic-factors-for-esophageal-squamous-cell-carcinoma
#8
Yuan Li, Zhiliang Lu, Yun Che, Jingnan Wang, Shouguo Sun, Jianbing Huang, Shuangshuang Mao, Yuanyuan Lei, Zhaoli Chen, Jie He
Understanding interactions between tumor and the host immune system holds great promise to uncover biomarkers for targeted therapies and clinical outcomes. However, systematical analysis of immune signatures in esophageal squamous cell carcinoma (ESCC) remains largely unstudied. In this study, immune signatures containing 708 immune related genes were curated from mRNA microarray data with tumor and paired normal tissues from 119 ESCC patients. Differential expression and survival analysis were performed with validations from Human Protein Atlas and an independent cohort of 110 ESCC patients by immunohistochemistry staining...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/29108284/overexpression-of-mir-26b-decreases-the-cisplatin-resistance-in-laryngeal-cancer-by-targeting-atf2
#9
Linli Tian, Jiarui Zhang, Xiuxia Ren, Xinyu Liu, Wei Gao, Chen Zhang, Yanan Sun, Ming Liu
Cisplatin is a common used chemotherapeutic drug for the treatment of laryngeal cancer. However, drug-resistance is a major obstacle in platinum-based chemotherapy for laryngeal cancer. Recent studies have demonstrated that dysregulation of microRNAs (miRNAs) is responsible for chemoresistance in multiple cancers including laryngeal cancer, but the potential mechanisms are required to be explored. In the present study, we constantly exposed the laryngeal cancer cell line Hep-2 with cisplatin to establish a cisplatin-resistant laryngeal cancer cell model (Hep-2/R)...
October 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/29107187/generation-of-recombinant-affinity-reagents-against-a-two-phosphosite-epitope-of-atf2
#10
Jennifer McGinnis, Brian K Kay
Activating Transcription Factor 2 (ATF2) plays an important role in mammalian cell proliferation, apoptosis and DNA repair. Its activation is dependent on the sequential phosphorylation of residue threonine 71 (T71) followed by threonine 69 (T69) in its transactivation domain. While these modifications can be directed by a variety of kinases, the time to reach full phosphorylation is dependent on which signaling pathway has been activated, which is thought to be important for proper temporal regulation. To explore this phenomenon further, there have been ongoing efforts to generate affinity reagents for monitoring phosphorylation events in cellular assays...
October 26, 2017: New Biotechnology
https://www.readbyqxmd.com/read/29072705/microrna-145-attenuates-tnf-%C3%AE-driven-cartilage-matrix-degradation-in-osteoarthritis-via-direct-suppression-of-mkk4
#11
Guoli Hu, Xiaoying Zhao, Chuandong Wang, Yiyun Geng, Jingyu Zhao, Jiajia Xu, Bin Zuo, Chen Zhao, Chenglong Wang, Xiaoling Zhang
Cartilage dyshomeostasis contributes to osteoarthritis (OA) pathogenesis, and tumor necrosis factor (TNF)-α has critical role in this process by driving inflammatory cascades and cartilage degradation. However, the negative regulation of TNF-α-mediated signaling remains undefined. Here we demonstrate the crucial role of miR-145 in the modulation of TNF-α-mediated signaling and cartilage matrix degradation. MicroRNA (miRNA) expression profiles of TNF-α-stimulated chondrocytes showed that miR-145 expression was rapidly downregulated by TNF-α...
October 26, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/29017144/anxiolytic-effect-of-fatty-acids-and-terpenes-fraction-from-aloysia-triphylla-serotoninergic-gabaergic-and-glutamatergic-implications
#12
Enrique Jiménez-Ferrer, Mayra Alejandra Santillán-Urquiza, Elian Alegría-Herrera, Alejandro Zamilpa, Carmen Noguerón-Merino, Jaime Tortoriello, Victor Navarro-García, Margarita Avilés-Flores, Macrina Fuentes-Mata, Maribel Herrera-Ruiz
Aloysia triphylla (Verbenaceae) is an aromatic medicinal plant, and it is used for the treatment of "nervous" problems as, "sadness" and "nervousness". While, there are no reports about its pharmacological activity in animal models. The objective of this work was to evaluate the anxiolytic effect of the extracts and fractions of this species and to measure the interaction of the most active fraction with serotonergic, glutamatergic and GABAergic drugs. An elevated plus maze test was carried ought where the methanol (AtM), dicloromethane (AtD) and hexanic (AtH) extracts presented anxiolytic activity in mice when exposed to the test...
October 7, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28982580/stimulation-of-transient-receptor-potential-m3-trpm3-channels-increases-interleukin-8-gene-promoter-activity-involving-ap-1-and-extracellular-signal-regulated-protein-kinase
#13
Sandra Rubil, Andrea Lesch, Naofumi Mukaida, Gerald Thiel
Stimulation of Ca(2+) permeable TRPM3 (transient receptor potential melastatin-3) channels with the steroid ligand pregnenolone sulfate activates stimulus-responsive transcription factors, including the transcription factor AP-1 (activator protein-1). As part of a search for AP-1-regulated target genes we analyzed the gene encoding interleukin-8 (IL-8) in HEK293 cells expressing TRPM3 channels. Here, we show that stimulation of TRPM3 channels activated transcription of an IL-8 promoter-controlled reporter gene that was embedded into the chromatin of the cells...
October 2, 2017: Cytokine
https://www.readbyqxmd.com/read/28977001/microrna-30b-controls-endothelial-cell-capillary-morphogenesis-through-regulation-of-transforming-growth-factor-beta-2
#14
Grant A Howe, Kayla Kazda, Christina L Addison
The importance of microRNA (miRNA) to vascular biology is becoming increasingly evident; however, the function of a significant number of miRNA remains to be determined. In particular, the effect of growth factor regulation of miRNAs on endothelial cell morphogenesis is incomplete. Thus, we aimed to identify miRNAs regulated by pro-angiogenic vascular endothelial growth factor (VEGF) and determine the effects of VEGF-regulated miRNAs and their targets on processes important for angiogenesis. Human umbilical vein endothelial cells (HUVECs) were thus stimulated with VEGF and miRNA levels assessed using microarrays...
2017: PloS One
https://www.readbyqxmd.com/read/28918037/a-novel-pak1-atf2-mir-132-signaling-axis-is-involved-in-the-hematogenous-metastasis-of-gastric-cancer-cells
#15
Funan Liu, Zhenguo Cheng, Xiaodong Li, Yanshu Li, Hongyan Zhang, Jiabin Li, Furong Liu, Huimian Xu, Feng Li
We, along with others, have shown previously that P21-activated kinase 1 (Pak1) plays a pivotal role in gastric cancer progression and metastasis. However, whether Pak1 controls gastric cancer metastasis by regulating microRNAs (miRNAs) has never been explored. Here, we report a novel mechanism of Pak1 in tumor metastasis. A detailed examination revealed that Pak1 interacts with and phosphorylates the serine 62 residue of ATF2 and then blocks its translocation into the nucleus. We also confirmed that ATF2 binds to the promoter of miR-132 and tightly regulates its transcription, thus explaining the regulatory mechanism of miR-132 by Pak1...
September 15, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28916425/p38mapk-family-isoform-p38%C3%AE-and-activating-transcription-factor-2-are-associated-with-the-malignant-phenotypes-and-poor-prognosis-of-patients-with-ovarian-adenocarcinoma
#16
Wan-Juan Song, Yu Dong, Cheng Luo, Yuan-Yuan Chen
This study was to identify the biomarkers for the malignancy and poor prognosis in patients with ovarian cancer. The protein expression of p38MAPK family isoform p38α (p38α) and activating transcription factor 2 (ATF2) was measured in 120 ovarian serous adenocarcinomas and 34 normal fallopian tubes using immunohistochemistry. Stable OV-90 cells expressing p38α and ATF2 inhibitor were established using shRNA lentivirus. Cell proliferation, invasion, and migration were analyzed in vitro. Tumor growth and chemosensitivity were investigated in xenograft tumor models...
October 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28887384/constitutive-activation-of-p46jnk2-is-indispensable-for-c-ebp%C3%AE-induction-in-the-initial-stage-of-adipogenic-differentiation
#17
Joji Kusuyama, Tomokazu Ohnishi, Kenjiro Bandow, Muhammad Subhan Amir, Kaori Shima, Ichiro Semba, Tetsuya Matsuguchi
Adipogenic differentiation plays a vital role in energy homeostasis and endocrine system. Several transcription factors, including peroxisome proliferator-activated receptor gamma 2 and CCAAT-enhancer-binding protein (C/EBP) α, β, and δ, are important for the process, whereas the stage-specific intracellular signal transduction regulating the onset of adipogenesis remains enigmatic. Here, we explored the functional role of c-jun N-terminal kinases (JNKs) in adipogenic differentiation using in vitro differentiation models of 3T3-L1 cells and primary adipo-progenitor cells...
October 5, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28836366/lipoteichoic-acid-upregulates-plasminogen-activator-inhibitor-1-expression-in-parapneumonic-effusions
#18
Kai-Ling Lee, Wei-Lin Chen, Ray-Jade Chen, Kevin S Lai, Chi-Li Chung
BACKGROUND AND OBJECTIVE: Parapneumonic effusion (PPE) is commonly caused by Gram-positive bacteria (GPB) and often presents with pleural loculation, which is characterized by overproduction of plasminogen activator inhibitor (PAI)-1. Lipoteichoic acid (LTA), a surface adhesion molecule of GPB, binds to the pleural mesothelium and triggers inflammation. However, the effects of LTA on PAI-1 expression in PPE and underlying mechanisms remain unclear. METHODS: Thirty consecutive patients with PPE were enrolled, including uncomplicated culture negative (CN, n = 11), Gram-negative bacteria (GNB, n = 7) and GPB (n = 12) groups stratified by pleural fluid characteristics and bacteriology, and the effusion PAI-1 levels were measured...
August 23, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28833446/necrotic-cell-death-occur-via-jnk-pathway-with-the-activity-of-transcription-factor-c-jun-by-4-mc-in-ins-1-cell-line
#19
Ayse Karatug Kacar, Sehnaz Bolkent
In this study, it was aimed to determine the doses of 4-methylcatechol causing cell death in rat insulinoma β-cells (INS-1), to find out the type of cellular death at these doses, and to investigate the molecular mechanism of cellular death occurring. More necrotic cells were observed than apoptosis with the administration of 350, 400, and 450 μM 4-methylcatechol. Lactate dehydrogenase levels, reactive oxygen species, mitochondrial potential loss, ATP and GTP losses increased at these doses. The JNK and ERK cellular pathway were screened...
August 21, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28771594/patients-experiencing-statin-induced-myalgia-exhibit-a-unique-program-of-skeletal-muscle-gene-expression-following-statin-re-challenge
#20
Marshall B Elam, Gipsy Majumdar, Khyobeni Mozhui, Ivan C Gerling, Santiago R Vera, Hannah Fish-Trotter, Robert W Williams, Richard D Childress, Rajendra Raghow
Statins, the 3-hydroxy-3-methyl-glutaryl (HMG)-CoA reductase inhibitors, are widely prescribed for treatment of hypercholesterolemia. Although statins are generally well tolerated, up to ten percent of statin-treated patients experience myalgia symptoms, defined as muscle pain without elevated creatinine phosphokinase (CPK) levels. Myalgia is the most frequent reason for discontinuation of statin therapy. The mechanisms underlying statin myalgia are not clearly understood. To elucidate changes in gene expression associated with statin myalgia, we compared profiles of gene expression in skeletal muscle biopsies from patients with statin myalgia who were undergoing statin re-challenge (cases) versus those of statin-tolerant controls...
2017: PloS One
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