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Chen ST, Chang KS, Lin WY, Hsu SY, Sung HC, Lin YH, Feng TH, Hou CP, Juang HH. Activating transcription factor 3 is an antitumor gene synergizing with growth differentiation factor 15 to modulate cell growth in human bladder cancer. Biomed J 2024:100756. [PMID: 38942385 DOI: 10.1016/j.bj.2024.100756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 06/17/2024] [Accepted: 06/25/2024] [Indexed: 06/30/2024] Open
Abstract
BACKGROUND The functions of activating transcription factor 3 (ATF3) within the human bladder remain unexplored. This study delves into the expressions, functions, and regulatory mechanisms of ATF3 in human bladder cancer. MATERIAL AND METHODS Gene expressions were determined by immunoblot, RT-qPCR, and reporter assays. Assays of Ki67, colony formation, Matrigel invasion, and the xenograft animal study were used to assess the cell proliferation, invasion, and tumorigenesis in vitro and in vivo. Silico analysis from TCGA database examined the correlations between GDF15 and ATF3 expressions, clinicopathologic features, and progression-free survival rates. RESULTS Silico analysis confirmed that ATF3 is an antitumor gene, and the expression positively correlates with GDF15 in bladder cancer tissues. Multivariate analysis revealed that low ATF3/GDF15 but not a single low expression of ATF3 is an independent prognostic factor for progression-free survival of bladder cancer patients. Ectopic overexpression of ATF3 downregulated cell proliferation and invasion in bladder cancer cells in vitro, while ATF3-knockdown reversed these results. Knockdown of ATF3 upregulated EMT markers to enhance cell invasion in vitro and downregulated GDF15, NDRG1, and KAI-1 to elevate tumor growth in vivo. The activation of metformin on ATF3 and GDF15 in bladder cancer cells was blocked by SB431542, a TGFβ receptor inhibitor. ATF3 positively regulated GDF15 expression in bladder cancer cells through a feedback loop. CONCLUSIONS Our results identify that ATF3 is a metformin-upregulated antitumor gene. Results of Silico analysis align with cell-based studies suggesting that low ATF3/GDF15 could be a negative prognostic marker for bladder cancer.
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Affiliation(s)
- Syue-Ting Chen
- Department of Anatomy, College of Medicine, Chang Gung University, Kwei-Shan, 33302, Tao-Yuan, Taiwan; Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan 33302, Taiwan; Department of Urology, Chang Gung Memorial Hospital-Linkou, Kwei-Shan, Tao-Yuan, 33302, Taiwan
| | - Kang-Shuo Chang
- Department of Anatomy, College of Medicine, Chang Gung University, Kwei-Shan, 33302, Tao-Yuan, Taiwan
| | - Wei-Yin Lin
- Department of Internal Medicine, Chang Gung Memorial Hospital-Linkou, Kwei-Shan, Tao-Yuan 33302, Taiwan
| | - Shu-Yuan Hsu
- Department of Anatomy, College of Medicine, Chang Gung University, Kwei-Shan, 33302, Tao-Yuan, Taiwan; Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan 33302, Taiwan
| | - Hsin-Ching Sung
- Department of Anatomy, College of Medicine, Chang Gung University, Kwei-Shan, 33302, Tao-Yuan, Taiwan; Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan 33302, Taiwan
| | - Yu-Hsiang Lin
- Department of Urology, Chang Gung Memorial Hospital-Linkou, Kwei-Shan, Tao-Yuan, 33302, Taiwan
| | - Tsui-Hsia Feng
- School of Nursing, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan 33302, Taiwan
| | - Chen-Pang Hou
- Department of Urology, Chang Gung Memorial Hospital-Linkou, Kwei-Shan, Tao-Yuan, 33302, Taiwan.
| | - Horng-Heng Juang
- Department of Anatomy, College of Medicine, Chang Gung University, Kwei-Shan, 33302, Tao-Yuan, Taiwan; Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan 33302, Taiwan; Department of Urology, Chang Gung Memorial Hospital-Linkou, Kwei-Shan, Tao-Yuan, 33302, Taiwan.
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2
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Zhang S, Yang F, Huang Y, He L, Li Y, Wan YCE, Ding Y, Chan KM, Xie T, Sun H, Wang H. ATF3 induction prevents precocious activation of skeletal muscle stem cell by regulating H2B expression. Nat Commun 2023; 14:4978. [PMID: 37591871 PMCID: PMC10435463 DOI: 10.1038/s41467-023-40465-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Accepted: 07/27/2023] [Indexed: 08/19/2023] Open
Abstract
Skeletal muscle stem cells (also called satellite cells, SCs) are important for maintaining muscle tissue homeostasis and damage-induced regeneration. However, it remains poorly understood how SCs enter cell cycle to become activated upon injury. Here we report that AP-1 family member ATF3 (Activating Transcription Factor 3) prevents SC premature activation. Atf3 is rapidly and transiently induced in SCs upon activation. Short-term deletion of Atf3 in SCs accelerates acute injury-induced regeneration, however, its long-term deletion exhausts the SC pool and thus impairs muscle regeneration. The Atf3 loss also provokes SC activation during voluntary exercise and enhances the activation during endurance exercise. Mechanistically, ATF3 directly activates the transcription of Histone 2B genes, whose reduction accelerates nucleosome displacement and gene transcription required for SC activation. Finally, the ATF3-dependent H2B expression also prevents genome instability and replicative senescence in SCs. Therefore, this study has revealed a previously unknown mechanism for preserving the SC population by actively suppressing precocious activation, in which ATF3 is a key regulator.
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Affiliation(s)
- Suyang Zhang
- Department of Orthopaedics and Traumatology, Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong SAR, China
- Center for Neuromusculoskeletal Restorative Medicine, Hong Kong Science Park, New Territories, Hong Kong SAR, China
| | - Feng Yang
- Department of Chemical Pathology, Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yile Huang
- Department of Chemical Pathology, Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Liangqiang He
- Center for Neuromusculoskeletal Restorative Medicine, Hong Kong Science Park, New Territories, Hong Kong SAR, China
- Department of Chemical Pathology, Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yuying Li
- Department of Chemical Pathology, Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yi Ching Esther Wan
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong SAR, China
- Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institute of City University of Hong Kong, Shenzhen, 518172, China
| | - Yingzhe Ding
- Department of Chemical Pathology, Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Kui Ming Chan
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong SAR, China
- Key Laboratory of Biochip Technology, Biotech and Health Centre, Shenzhen Research Institute of City University of Hong Kong, Shenzhen, 518172, China
| | - Ting Xie
- Division of Life Science, The Hong Kong University of Science and Technology, Hong Kong SAR, China
| | - Hao Sun
- Department of Chemical Pathology, Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong SAR, China.
| | - Huating Wang
- Department of Orthopaedics and Traumatology, Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong SAR, China.
- Center for Neuromusculoskeletal Restorative Medicine, Hong Kong Science Park, New Territories, Hong Kong SAR, China.
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3
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Shen H, Gu X, Li H, Tang M, Li X, Zhang Y, Su F, Wang Z. Exploring Prognosis, Tumor Microenvironment and Tumor Immune Infiltration in Hepatocellular Carcinoma Based on ATF/CREB Transcription Factor Family Gene-Related Model. J Hepatocell Carcinoma 2023; 10:327-345. [PMID: 36874250 PMCID: PMC9983578 DOI: 10.2147/jhc.s398713] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 02/20/2023] [Indexed: 03/02/2023] Open
Abstract
Introduction Hepatocellular carcinoma (HCC) is the most common form of primary liver cancer. It is the fourth leading cause of cancer-related death worldwide. Deregulation of the ATF/CREB family is associated with the progression of metabolic homeostasis and cancer. Because the liver plays a central role in metabolic homeostasis, it is critical to assess the predictive value of the ATF/CREB family in the diagnosis and prognosis of HCC. Methods Using data from The Cancer Genome Atlas (TCGA), this research evaluated the expression, copy number variations, and frequency of somatic mutations of 21 genes in the ATF/CREB family in HCC. A prognostic model based on the ATF/CREB gene family was developed via Lasso and Cox regression analyses, with the TCGA cohort serving as the training dataset and the International Cancer Genome Consortium (ICGC) cohort serving as the validation set. Kaplan-Meier and receiver operating characteristic analyses verified the accuracy of the prognostic model. Furthermore, the association among the prognostic model, immune checkpoints, and immune cells was examined. Results High-risk patients exhibited an unfavorable outcome as opposed to those in the low-risk category. Multivariate Cox analysis revealed that the risk score calculated based on the prognostic model was an independent prognostic factor for HCC. Analysis of immune mechanisms revealed that the risk score had a positive link to the expression of immune checkpoints, particularly CD274, PDCD1, LAG3, and CTLA4. Differences in immune cells and immune-associated roles were found between the high- and low-risk patients, as determined by single-sample gene set enrichment analysis. The core genes ATF1, CREB1, and CREB3 in the prognostic model were shown to be upregulated in HCC tissues as opposed to adjoining normal tissues, and the 10-year overall survival (OS) rate was worse among patients with elevated expression levels of ATF1, CREB1, and CREB3. Elevated expression levels of ATF1, CREB1, and CREB3 in HCC tissues were confirmed by qRT-PCR and immunohistochemistry studies. Conclusion According to the results of our training set and test set, the risk model based on the six ATF/CREB gene signatures predicting prognosis has certain predictive accuracy in predicting the survival of HCC patients. This study provides novel insights into the individualized treatment of patients with HCC.
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Affiliation(s)
- Honghong Shen
- Department of Medical Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu, People's Republic of China
| | - Xianhua Gu
- Department of Gynecology Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu, People's Republic of China
| | - Huiyuan Li
- Department of Medical Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu, People's Republic of China
| | - Mingyue Tang
- Department of Medical Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu, People's Republic of China
| | - Xinwei Li
- Department of Medical Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu, People's Republic of China
| | - Yue Zhang
- Department of Medical Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu, People's Republic of China
| | - Fang Su
- Department of Medical Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu, People's Republic of China
| | - Zishu Wang
- Department of Medical Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu, People's Republic of China
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Šimečková P, Pěnčíková K, Kováč O, Slavík J, Pařenicová M, Vondráček J, Machala M. In vitro profiling of toxic effects of environmental polycyclic aromatic hydrocarbons on nuclear receptor signaling, disruption of endogenous metabolism and induction of cellular stress. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 815:151967. [PMID: 34843781 DOI: 10.1016/j.scitotenv.2021.151967] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 11/03/2021] [Accepted: 11/22/2021] [Indexed: 06/13/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) may interact with multiple intracellular receptors and related signaling pathways. We comprehensively evaluated the toxicity profiles of six environmentally relevant PAHs differing in structure, genotoxicity and their ability to activate the aryl hydrocarbon receptor (AhR). We focused particularly on their impact on intracellular hormone-, xenobiotic- and lipid-sensing receptors, as well as on cellular stress markers, combining a battery of human reporter gene assays and qRT-PCR evaluation of endogenous gene expression in human hepatocyte-like HepaRG cells, with LC/MS-MS analysis of cellular sphingolipids. The effects of PAHs included: activation of estrogen receptor α (in case of fluoranthene (Fla), pyrene (Pyr), benz[a]anthracene (BaA), benzo[a]pyrene (BaP)), suppression of androgen receptor activity (Fla, BaA, BaP and benzo[k]fluoranthene (BkF)), enhancement of dexamethasone-induced glucocorticoid receptor activity (chrysene (Chry), BaA, and BaP), and potentiation of triiodothyronine-induced thyroid receptor α activity (all tested PAHs). PAHs also induced transcription of endogenous gene targets of constitutive androstane receptor (Fla, Pyr), or repression of target genes of pregnane X receptor and peroxisome proliferator-activated receptor α (in case of the AhR-activating PAHs - Chry, BaA, BaP, and BkF) in HepaRG cells. In the same cell model, the AhR agonists reduced the expression of glucose metabolism genes (PCK1, G6PC and PDK4), and they up-regulated levels of glucosylceramides, together with a concomitant induction of expression of UGCG, glucosylceramide synthesis enzyme. Finally, both BaP and BkF were found to induce expression of early stress and genotoxicity markers: ATF3, EGR1, GDF15, CDKN1A/p21, and GADD45A mRNAs, while BaP alone increased levels of IL-6 mRNA. Overall, whereas low-molecular-weight PAHs exerted significant effects on nuclear receptors (with CYP2B6 induction observed already at nanomolar concentrations), the AhR activation by 4-ring and 5-ring PAHs appeared to be a key mechanism underlying their impact on nuclear receptor signaling, endogenous metabolism and induction of early stress and genotoxicity markers.
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Affiliation(s)
- Pavlína Šimečková
- Department of Pharmacology and Toxicology, Veterinary Research Institute, 62100 Brno, Czech Republic
| | - Kateřina Pěnčíková
- Department of Pharmacology and Toxicology, Veterinary Research Institute, 62100 Brno, Czech Republic
| | - Ondrej Kováč
- Department of Pharmacology and Toxicology, Veterinary Research Institute, 62100 Brno, Czech Republic
| | - Josef Slavík
- Department of Pharmacology and Toxicology, Veterinary Research Institute, 62100 Brno, Czech Republic
| | - Martina Pařenicová
- Department of Pharmacology and Toxicology, Veterinary Research Institute, 62100 Brno, Czech Republic
| | - Jan Vondráček
- Department of Cytokinetics, Institute of Biophysics of the Czech Academy of Sciences, 61265 Brno, Czech Republic
| | - Miroslav Machala
- Department of Pharmacology and Toxicology, Veterinary Research Institute, 62100 Brno, Czech Republic.
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Integrative transcription start site analysis and physiological phenotyping reveal torpor-specific expression program in mouse skeletal muscle. Commun Biol 2021; 4:1290. [PMID: 34782710 PMCID: PMC8592991 DOI: 10.1038/s42003-021-02819-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 10/28/2021] [Indexed: 11/30/2022] Open
Abstract
Mice enter an active hypometabolic state, called daily torpor when they experience a lowered caloric intake under cold ambient temperature. During torpor, the oxygen consumption rate in some animals drops to less than 30% of the normal rate without harming the body. This safe but severe reduction in metabolism is attractive for various clinical applications; however, the mechanism and molecules involved are unclear. Therefore, here we systematically analyzed the gene expression landscape on the level of the RNA transcription start sites in mouse skeletal muscles under various metabolic states to identify torpor-specific transcribed regulatory patterns. We analyzed the soleus muscles from 38 mice in torpid and non-torpid conditions and identified 287 torpor-specific promoters out of 12,862 detected promoters. Furthermore, we found that the transcription factor ATF3 is highly expressed during torpor deprivation and its binding motif is enriched in torpor-specific promoters. Atf3 was also highly expressed in the heart and brown adipose tissue during torpor and systemically knocking out Atf3 affected the torpor phenotype. Our results demonstrate that mouse torpor combined with powerful genetic tools is useful for studying active hypometabolism.
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6
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Liu X, Zhang J, Xiong X, Chen C, Xing Y, Duan Y, Xiao S, Yang B, Ma J. An Integrative Analysis of Transcriptome and GWAS Data to Identify Potential Candidate Genes Influencing Meat Quality Traits in Pigs. Front Genet 2021; 12:748070. [PMID: 34745221 PMCID: PMC8567094 DOI: 10.3389/fgene.2021.748070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 09/27/2021] [Indexed: 11/13/2022] Open
Abstract
Understanding the genetic factors behind meat quality traits is of great significance to animal breeding and production. We previously conducted a genome-wide association study (GWAS) for meat quality traits in a White Duroc × Erhualian F2 pig population using Illumina porcine 60K SNP data. Here, we further investigate the functional candidate genes and their network modules associated with meat quality traits by integrating transcriptomics and GWAS information. Quantitative trait transcript (QTT) analysis, gene expression QTL (eQTL) mapping, and weighted gene co-expression network analysis (WGCNA) were performed using the digital gene expression (DGE) data from 493 F2 pig's muscle and liver samples. Among the quantified 20,108 liver and 23,728 muscle transcripts, 535 liver and 1,014 muscle QTTs corresponding to 416 and 721 genes, respectively, were found to be significantly (p < 5 × 10-4) correlated with 22 meat quality traits measured on longissiums dorsi muscle (LM) or semimembranosus muscle (SM). Transcripts associated with muscle glycolytic potential (GP) and pH values were enriched for genes involved in metabolic process. There were 42 QTTs (for 32 genes) shared by liver and muscle tissues, of which 10 QTTs represent GP- and/or pH-related genes, such as JUNB, ATF3, and PPP1R3B. Furthermore, a genome-wide eQTL mapping revealed a total of 3,054 eQTLs for all annotated transcripts in muscle (p < 2.08 × 10-5), including 1,283 cis-eQTLs and 1771 trans-eQTLs. In addition, WGCNA identified five modules relevant to glycogen metabolism pathway and highlighted the connections between variations in meat quality traits and genes involved in energy process. Integrative analysis of GWAS loci, eQTL, and QTT demonstrated GALNT15/GALNTL2 and HTATIP2 as strong candidate genes for drip loss and pH drop from postmortem 45 min to 24 h, respectively. Our findings provide valuable insights into the genetic basis of meat quality traits and greatly expand the number of candidate genes that may be valuable for future functional analysis and genetic improvement of meat quality.
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Affiliation(s)
- Xianxian Liu
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural University, Nanchang, China
| | - Junjie Zhang
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural University, Nanchang, China
| | - Xinwei Xiong
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural University, Nanchang, China
| | - Congying Chen
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural University, Nanchang, China
| | - Yuyun Xing
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural University, Nanchang, China
| | - Yanyu Duan
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural University, Nanchang, China
| | - Shijun Xiao
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural University, Nanchang, China
| | - Bin Yang
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural University, Nanchang, China
| | - Junwu Ma
- State Key Laboratory of Pig Genetic Improvement and Production Technology, Jiangxi Agricultural University, Nanchang, China
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Xu Y, Hu S, Jadhav K, Zhu Y, Pan X, Bawa FC, Yin L, Zhang Y. Hepatocytic Activating Transcription Factor 3 Protects Against Steatohepatitis via Hepatocyte Nuclear Factor 4α. Diabetes 2021; 70:2506-2517. [PMID: 34475098 PMCID: PMC8564409 DOI: 10.2337/db21-0181] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 08/19/2021] [Indexed: 12/17/2022]
Abstract
Activating transcription factor 3 (ATF3) has been shown to play an important role in HDL metabolism; yet, the role of hepatocytic ATF3 in the development of steatohepatitis remains elusive. Here we show that adenoassociated virus-mediated overexpression of human ATF3 in hepatocytes prevents diet-induced steatohepatitis in C57BL/6 mice and reverses steatohepatitis in db/db mice. Conversely, global or hepatocyte-specific loss of ATF3 aggravates diet-induced steatohepatitis. Mechanistically, hepatocytic ATF3 induces hepatic lipolysis and fatty acid oxidation and inhibits inflammation and apoptosis. We further show that hepatocyte nuclear factor 4α (HNF4α) is required for ATF3 to improve steatohepatitis. Thus, the current study indicates that ATF3 protects against steatohepatitis through, at least in part, hepatic HNF4α. Targeting hepatic ATF3 may be useful for treatment of steatohepatitis.
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Affiliation(s)
- Yanyong Xu
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown, OH
| | - Shuwei Hu
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown, OH
| | - Kavita Jadhav
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown, OH
| | - Yingdong Zhu
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown, OH
| | - Xiaoli Pan
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown, OH
| | - Fathima Cassim Bawa
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown, OH
| | - Liya Yin
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown, OH
| | - Yanqiao Zhang
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, Rootstown, OH
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Cui A, Ding D, Li Y. Regulation of Hepatic Metabolism and Cell Growth by the ATF/CREB Family of Transcription Factors. Diabetes 2021; 70:653-664. [PMID: 33608424 PMCID: PMC7897342 DOI: 10.2337/dbi20-0006] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 12/14/2020] [Indexed: 12/12/2022]
Abstract
The liver is a major metabolic organ that regulates the whole-body metabolic homeostasis and controls hepatocyte proliferation and growth. The ATF/CREB family of transcription factors integrates nutritional and growth signals to the regulation of metabolism and cell growth in the liver, and deregulated ATF/CREB family signaling is implicated in the progression of type 2 diabetes, nonalcoholic fatty liver disease, and cancer. This article focuses on the roles of the ATF/CREB family in the regulation of glucose and lipid metabolism and cell growth and its importance in liver physiology. We also highlight how the disrupted ATF/CREB network contributes to human diseases and discuss the perspectives of therapeutically targeting ATF/CREB members in the clinic.
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Affiliation(s)
- Aoyuan Cui
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Dong Ding
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yu Li
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
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Liu Y, Hu Y, Xiong J, Zeng X. Overexpression of Activating Transcription Factor 3 Alleviates Cardiac Microvascular Ischemia/Reperfusion Injury in Rats. Front Pharmacol 2021; 12:598959. [PMID: 33679395 PMCID: PMC7934060 DOI: 10.3389/fphar.2021.598959] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 01/11/2021] [Indexed: 12/18/2022] Open
Abstract
Activating transcription factor 3 (ATF3) has been confirmed to be responsive to oxidative stress and to negatively regulate the activity of Toll-like receptor 4 (TLR4). However, the effect of ATF3 on cardiac microvascular ischemia/reperfusion (I/R) injury remains unknown. The GEO2R online tool was employed to obtain differentially expressed genes GSE4105 and GSE122020, in two rat I/R injury microarray datasets. We established a rat myocardial I/R model in vivo, and also generated an in vitro hypoxia/reoxygenation (H/R) model of cardiomyoblast H9c2 cells. Overexpression of ATF3 was achieved by adenoviral-mediated gene transfer (Ad-ATF3). Rats were randomly divided into four groups: sham, I/R, I/R + Ad-Lacz (as a control), and I/R + Ad-ATF3. ELISA, CCK-8, DCFH-DA probe, qRT-PCR and Western blotting were used to determine the expression of ATF3, oxidative indices, cellular injury and TLR4/NF-κB pathway-associated proteins. Transmission electron microscopy, immunohistochemistry and immunofluorescence were used to detect the leukocyte infiltration and the alteration of microvascular morphology and function in vivo. Echocardiographic and hemodynamic data were also obtained. Bioinformatics analysis revealed that ATF3 was upregulated in I/R myocardia in two independent rat myocardial I/R models. Cardiac microvascular I/R injury included leukocyte infiltration, microvascular integrity disruption, and microvascular perfusion defect, which eventually resulted in the deterioration of hemodynamic parameters and heart function. Ad-ATF3 significantly restored microvascular function, increased cardiac microvascular perfusion, and improved hemodynamic parameters and heart function. Mechanistically, Ad-ATF3 ameliorated oxidative stress, inhibited TLR4/NF-κB pathway activation and down-regulated the expression of downstream proinflammatory cytokines in I/R myocardium in vivo and in H/R H9c2 cells in vitro. ATF3 overexpression protects against cardiac microvascular I/R injury in part by inhibiting the TLR4/NF-κB pathway and oxidative stress.
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Affiliation(s)
- Yi Liu
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory Base of Precision Medicine in Cardio-Cerebrovascular Diseases Control and Prevention, Nanning, China.,Guangxi Clinical Research Center for Cardio-Cerebrovascular Diseases, Nanning, China.,School of Basic Medical Sciences, Guangxi Medical University, Nanning, China
| | - Yisen Hu
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory Base of Precision Medicine in Cardio-Cerebrovascular Diseases Control and Prevention, Nanning, China.,Guangxi Clinical Research Center for Cardio-Cerebrovascular Diseases, Nanning, China.,School of Basic Medical Sciences, Guangxi Medical University, Nanning, China
| | - Jingjie Xiong
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory Base of Precision Medicine in Cardio-Cerebrovascular Diseases Control and Prevention, Nanning, China.,Guangxi Clinical Research Center for Cardio-Cerebrovascular Diseases, Nanning, China.,School of Basic Medical Sciences, Guangxi Medical University, Nanning, China
| | - Xiaocong Zeng
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory Base of Precision Medicine in Cardio-Cerebrovascular Diseases Control and Prevention, Nanning, China.,Guangxi Clinical Research Center for Cardio-Cerebrovascular Diseases, Nanning, China.,School of Basic Medical Sciences, Guangxi Medical University, Nanning, China
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10
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Magnaghi V, Martin S, Smith P, Allen L, Conte V, Reid AJ, Faroni A. Peripheral nerve regeneration following injury is altered in mice lacking P2X7 receptor. Eur J Neurosci 2020; 54:5798-5814. [DOI: 10.1111/ejn.14995] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 08/27/2020] [Accepted: 09/23/2020] [Indexed: 12/24/2022]
Affiliation(s)
- Valerio Magnaghi
- Department of Pharmacological and Biomolecular Sciences Università degli Studi di Milano Milan Italy
| | - Sarah Martin
- Blond McIndoe Laboratories Division of Cell Matrix Biology and Regenerative Medicine School of Biological Sciences Faculty of Biology Medicine and Health University of Manchester Manchester Academic Health Science Centre Manchester UK
| | - Patrick Smith
- Blond McIndoe Laboratories Division of Cell Matrix Biology and Regenerative Medicine School of Biological Sciences Faculty of Biology Medicine and Health University of Manchester Manchester Academic Health Science Centre Manchester UK
| | - Luke Allen
- Blond McIndoe Laboratories Division of Cell Matrix Biology and Regenerative Medicine School of Biological Sciences Faculty of Biology Medicine and Health University of Manchester Manchester Academic Health Science Centre Manchester UK
| | - Vincenzo Conte
- Department of Biomedical Sciences for Health Università degli Studi di Milano Milan Italy
| | - Adam J. Reid
- Blond McIndoe Laboratories Division of Cell Matrix Biology and Regenerative Medicine School of Biological Sciences Faculty of Biology Medicine and Health University of Manchester Manchester Academic Health Science Centre Manchester UK
- Department of Plastic Surgery & Burns Wythenshawe Hospital Manchester University NHS Foundation Trust Manchester Academic Health Science Centre Manchester UK
| | - Alessandro Faroni
- Blond McIndoe Laboratories Division of Cell Matrix Biology and Regenerative Medicine School of Biological Sciences Faculty of Biology Medicine and Health University of Manchester Manchester Academic Health Science Centre Manchester UK
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11
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Zhu JH, Yan QL, Wang JW, Chen Y, Ye QH, Wang ZJ, Huang T. The Key Genes for Perineural Invasion in Pancreatic Ductal Adenocarcinoma Identified With Monte-Carlo Feature Selection Method. Front Genet 2020; 11:554502. [PMID: 33193628 PMCID: PMC7593847 DOI: 10.3389/fgene.2020.554502] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 08/17/2020] [Indexed: 12/20/2022] Open
Abstract
Background Pancreatic ductal adenocarcinoma (PDAC) is the most aggressive form of pancreatic cancer. Its 5-year survival rate is only 3–5%. Perineural invasion (PNI) is a process of cancer cells invading the surrounding nerves and perineural spaces. It is considered to be associated with the poor prognosis of PDAC. About 90% of pancreatic cancer patients have PNI. The high incidence of PNI in pancreatic cancer limits radical resection and promotes local recurrence, which negatively affects life quality and survival time of the patients with pancreatic cancer. Objectives To investigate the mechanism of PNI in pancreatic cancer, we analyzed the gene expression profiles of tumors and adjacent tissues from 50 PDAC patients which included 28 patients with perineural invasion and 22 patients without perineural invasion. Method Using Monte-Carlo feature selection and Incremental Feature Selection (IFS) method, we identified 26 key features within which 15 features were from tumor tissues and 11 features were from adjacent tissues. Results Our results suggested that not only the tumor tissue, but also the adjacent tissue, was informative for perineural invasion prediction. The SVM classifier based on these 26 key features can predict perineural invasion accurately, with a high accuracy of 0.94 evaluated with leave-one-out cross validation (LOOCV). Conclusion The in-depth biological analysis of key feature genes, such as TNFRSF14, XPO1, and ATF3, shed light on the understanding of perineural invasion in pancreatic ductal adenocarcinoma.
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Affiliation(s)
- Jin-Hui Zhu
- Department of General Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qiu-Liang Yan
- Department of General Surgery, Jinhua People's Hospital, Jinhua, China
| | - Jian-Wei Wang
- Department of Surgical Oncology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yan Chen
- Department of General Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qing-Huang Ye
- Department of General Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhi-Jiang Wang
- Department of General Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Tao Huang
- Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
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12
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Yin HM, Yan LF, Liu Q, Peng Z, Zhang CY, Xia Y, Su D, Gu AH, Zhou Y. Activating transcription factor 3 coordinates differentiation of cardiac and hematopoietic progenitors by regulating glucose metabolism. SCIENCE ADVANCES 2020; 6:eaay9466. [PMID: 32494702 PMCID: PMC7202888 DOI: 10.1126/sciadv.aay9466] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Accepted: 01/27/2020] [Indexed: 05/10/2023]
Abstract
The cardiac and hematopoietic progenitors (CPs and HPs, respectively) in the mesoderm ultimately form a well-organized circulation system, but mechanisms that reconcile their development remain elusive. We found that activating transcription factor 3 (atf3) was highly expressed in the CPs, HPs, and mesoderm, in zebrafish. The atf3 -/- mutants exhibited atrial dilated cardiomyopathy and a high ratio of immature myeloid cells. These manifestations were primarily caused by the blockade of differentiation of both CPs and HPs within the anterior lateral plate mesoderm. Mechanistically, Atf3 targets cebpγ to repress slc2a1a-mediated glucose utilization. The high rate of glucose metabolism in atf3 -/- mutants inhibited the differentiation of progenitors by changing the redox state. Therefore, atf3 could provide CPs and HPs with metabolic adaptive capacity to changes in glucose levels. Our study provides new insights into the role of atf3 in the coordination of differentiation of CPs and HPs by regulating glucose metabolism.
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Affiliation(s)
- Hui-Min Yin
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Li-Feng Yan
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Qian Liu
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Zheng Peng
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Chi-Yuan Zhang
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Yu Xia
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Dan Su
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Ai-Hua Gu
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing 211166, China
- Corresponding author. (A.-H.G.); (Y.Z.)
| | - Yong Zhou
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
- Corresponding author. (A.-H.G.); (Y.Z.)
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13
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Verma N, Perie L, Mueller E. The mRNA levels of heat shock factor 1 are regulated by thermogenic signals via the cAMP-dependent transcription factor ATF3. J Biol Chem 2020; 295:5984-5994. [PMID: 32184357 DOI: 10.1074/jbc.ra119.012072] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 03/16/2020] [Indexed: 12/15/2022] Open
Abstract
Heat shock factor 1 (HSF1) regulates cellular adaptation to challenges such as heat shock and oxidative and proteotoxic stresses. We have recently reported a previously unappreciated role for HSF1 in the regulation of energy metabolism in fat tissues; however, whether HSF1 is differentially expressed in adipose depots and how its levels are regulated in fat tissues remain unclear. Here, we show that HSF1 levels are higher in brown and subcutaneous fat tissues than in those in the visceral depot and that HSF1 is more abundant in differentiated, thermogenic adipocytes. Gene expression experiments indicated that HSF1 is transcriptionally regulated in fat by agents that modulate cAMP levels, by cold exposure, and by pharmacological stimulation of β-adrenergic signaling. An in silico promoter analysis helped identify a putative response element for activating transcription factor 3 (ATF3) at -258 to -250 base pairs from the HSF1 transcriptional start site, and electrophoretic mobility shift and ChIP assays confirmed ATF3 binding to this sequence. Furthermore, functional assays disclosed that ATF3 is necessary and sufficient for HSF1 regulation. Detailed gene expression analysis revealed that ATF3 is one of the most highly induced ATFs in thermogenic tissues of mice exposed to cold temperatures or treated with the β-adrenergic receptor agonist CL316,243 and that its expression is induced by modulators of cAMP levels in isolated adipocytes. To the best of our knowledge, our results show for the first time that HSF1 is transcriptionally controlled by ATF3 in response to classic stimuli that promote heat generation in thermogenic tissues.
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Affiliation(s)
- Narendra Verma
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, New York University, New York, New York 10016
| | - Luce Perie
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, New York University, New York, New York 10016
| | - Elisabetta Mueller
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, New York University, New York, New York 10016.
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14
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Ku HC, Cheng CF. Master Regulator Activating Transcription Factor 3 (ATF3) in Metabolic Homeostasis and Cancer. Front Endocrinol (Lausanne) 2020; 11:556. [PMID: 32922364 PMCID: PMC7457002 DOI: 10.3389/fendo.2020.00556] [Citation(s) in RCA: 166] [Impact Index Per Article: 41.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 07/07/2020] [Indexed: 12/18/2022] Open
Abstract
Activating transcription factor 3 (ATF3) is a stress-induced transcription factor that plays vital roles in modulating metabolism, immunity, and oncogenesis. ATF3 acts as a hub of the cellular adaptive-response network. Multiple extracellular signals, such as endoplasmic reticulum (ER) stress, cytokines, chemokines, and LPS, are connected to ATF3 induction. The function of ATF3 as a regulator of metabolism and immunity has recently sparked intense attention. In this review, we describe how ATF3 can act as both a transcriptional activator and a repressor. We then focus on the role of ATF3 and ATF3-regulated signals in modulating metabolism, immunity, and oncogenesis. The roles of ATF3 in glucose metabolism and adipose tissue regulation are also explored. Next, we summarize how ATF3 regulates immunity and maintains normal host defense. In addition, we elaborate on the roles of ATF3 as a regulator of prostate, breast, colon, lung, and liver cancers. Further understanding of how ATF3 regulates signaling pathways involved in glucose metabolism, adipocyte metabolism, immuno-responsiveness, and oncogenesis in various cancers, including prostate, breast, colon, lung, and liver cancers, is then provided. Finally, we demonstrate that ATF3 acts as a master regulator of metabolic homeostasis and, therefore, may be an appealing target for the treatment of metabolic dyshomeostasis, immune disorders, and various cancers.
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Affiliation(s)
- Hui-Chen Ku
- Department of Pediatrics, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Taipei, Taiwan
| | - Ching-Feng Cheng
- Department of Pediatrics, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Taipei, Taiwan
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- Department of Pediatrics, Tzu Chi University, Hualien, Taiwan
- *Correspondence: Ching-Feng Cheng
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15
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Beddow SA, Gattu AK, Vatner DF, Paolella L, Alqarzaee A, Tashkandi N, Popov VB, Church CD, Rodeheffer MS, Cline GW, Geisler JG, Bhanot S, Samuel VT. PEPCK1 Antisense Oligonucleotide Prevents Adiposity and Impairs Hepatic Glycogen Synthesis in High-Fat Male Fed Rats. Endocrinology 2019; 160:205-219. [PMID: 30445425 PMCID: PMC6307100 DOI: 10.1210/en.2018-00630] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 11/06/2018] [Indexed: 11/19/2022]
Abstract
The increased hepatic gluconeogenesis in type 2 diabetes mellitus has often been ascribed to increased transcription of phosphoenolpyruvate carboxykinase 1, cystolic form (PEPCK1), although recent evidence has questioned this attribution. To assess the metabolic role of PEPCK1, we treated regular chow fed and high-fat fed (HFF) male Sprague-Dawley rats with a 2'-O-methoxyethyl chimeric antisense oligonucleotide (ASO) against PEPCK1 and compared them with control ASO-treated rats. PEPCK1 ASO effectively decreased PEPCK1 expression in the liver and white adipose tissue. In chow fed rats, PEPCK1 ASO did not alter adiposity, plasma glucose, or insulin. In contrast, PEPCK1 ASO decreased the white adipose tissue mass in HFF rats but without altering basal rates of lipolysis, de novo lipogenesis, or glyceroneogenesis in vivo. Despite the protection from adiposity, hepatic insulin sensitivity was impaired in HFF PEPCK1 ASO-treated rats. PEPCK1 ASO worsened hepatic steatosis, although without additional impairments in hepatic insulin signaling or activation of inflammatory signals in the liver. Instead, the development of hepatic insulin resistance and the decrease in hepatic glycogen synthesis during a hyperglycemic clamp was attributed to a decrease in hepatic glucokinase (GCK) expression and decreased synthesis of glycogen via the direct pathway. The decrease in GCK expression was associated with increased expression of activating transcription factor 3, a negative regulator of GCK transcription. These studies have demonstrated that PEPCK1 is integral to coordinating cellular metabolism in the liver and adipose tissue, although it does not directly effect hepatic glucose production or adipose glyceroneogenesis.
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Affiliation(s)
- Sara A Beddow
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
- West Haven Veterans Affairs Medical Center, West Haven, Connecticut
| | - Arijeet K Gattu
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
- West Haven Veterans Affairs Medical Center, West Haven, Connecticut
| | - Daniel F Vatner
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Lauren Paolella
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
- West Haven Veterans Affairs Medical Center, West Haven, Connecticut
| | | | - Nedda Tashkandi
- West Haven Veterans Affairs Medical Center, West Haven, Connecticut
| | - Violeta B Popov
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Christopher D Church
- Department of Comparative Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Matthew S Rodeheffer
- Department of Comparative Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Gary W Cline
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
| | | | | | - Varman T Samuel
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
- West Haven Veterans Affairs Medical Center, West Haven, Connecticut
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16
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Momozane T, Kawamura T, Itoh Y, Sanosaka M, Sasaki T, Kanzaki R, Ose N, Funaki S, Shintani Y, Minami M, Okumura M, Takemori H. Carnosol suppresses interleukin-6 production in mouse lungs injured by ischemia–reperfusion operation and in RAW264.7 macrophages treated with lipopolysaccharide. Biochem Cell Biol 2018; 96:769-776. [DOI: 10.1139/bcb-2017-0339] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Carnosol is a naturally occurring herbal compound, known for its antioxidative properties. We previously found that carnosol protected mouse lungs from ischemia–reperfusion injury in ex vivo cultures. To elucidate the molecular mechanisms underpinning carnosol-mediated lung protection, we analyzed modes of interleukin-6 (IL-6) gene expression, which is associated with lung ischemia–reperfusion injury. Microarray analysis of mouse lungs suggested that IL-6 mRNA levels were elevated in the mouse lungs subjected to clamp-reperfusion, which was associated with elevated levels of other inflammatory modulators, such as activating transcription factor 3 (ATF3). Carnosol pretreatment lowered the IL-6 protein levels in mouse lung homogenates prepared after the clamp-reperfusion. On the other hand, the ATF3 gene expression was negatively correlated with that of IL-6 in RAW264.7 cells. IL-6 mRNA levels and gene promoter activities were suppressed by carnosol in RAW264.7 cells, but rescued by ATF3 knockdown. When RAW264.7 cells were subjected to hypoxia–reoxygenation, carnosol treatment lowered oxygen consumption after reoxygenation, which was coupled with a correlation with a transient production of mitochondrial reactive oxygen species and following ATF3 gene expression. These results suggest that carnosol treatment could be a new strategy for protecting lungs from ischemia–reperfusion injury by modulating the ATF3–IL-6 axis.
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Affiliation(s)
- Toru Momozane
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
- Laboratory of Cell Signaling & Metabolic Disease, National Institute of Biomedical Innovation, 7-6-8, Asagi-Saito, Ibaraki Osaka, 567-0085, Japan
| | - Tomohiro Kawamura
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
- Laboratory of Cell Signaling & Metabolic Disease, National Institute of Biomedical Innovation, 7-6-8, Asagi-Saito, Ibaraki Osaka, 567-0085, Japan
| | - Yumi Itoh
- Laboratory of Cell Signaling & Metabolic Disease, National Institute of Biomedical Innovation, 7-6-8, Asagi-Saito, Ibaraki Osaka, 567-0085, Japan
| | - Masato Sanosaka
- Laboratory of Cell Signaling & Metabolic Disease, National Institute of Biomedical Innovation, 7-6-8, Asagi-Saito, Ibaraki Osaka, 567-0085, Japan
| | - Tsutomu Sasaki
- Department of Neurology, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Ryu Kanzaki
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Naoko Ose
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Soichiro Funaki
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yasushi Shintani
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Masato Minami
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Meinoshin Okumura
- Department of General Thoracic Surgery, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Hiroshi Takemori
- Laboratory of Cell Signaling & Metabolic Disease, National Institute of Biomedical Innovation, 7-6-8, Asagi-Saito, Ibaraki Osaka, 567-0085, Japan
- Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1, Yanagido, Gifu, 501-1193, Japan
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17
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Zhu Q, Wang H, Jiang B, Ni X, Jiang L, Li C, Wang X, Zhang F, Ke B, Lu L. Loss of ATF3 exacerbates liver damage through the activation of mTOR/p70S6K/ HIF-1α signaling pathway in liver inflammatory injury. Cell Death Dis 2018; 9:910. [PMID: 30185770 PMCID: PMC6125320 DOI: 10.1038/s41419-018-0894-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 07/10/2018] [Accepted: 07/11/2018] [Indexed: 12/14/2022]
Abstract
Activating transcription factor 3 (ATF3) is a stress-induced transcription factor that plays important roles in regulating immune and metabolic homeostasis. Activation of the mechanistic target of rapamycin (mTOR) and hypoxia-inducible factor (HIF) transcription factors are crucial for the regulation of immune cell function. Here, we investigated the mechanism by which the ATF3/mTOR/HIF-1 axis regulates immune responses in a liver ischemia/reperfusion injury (IRI) model. Deletion of ATF3 exacerbated liver damage, as evidenced by increased levels of serum ALT, intrahepatic macrophage/neutrophil trafficking, hepatocellular apoptosis, and the upregulation of pro-inflammatory mediators. ATF3 deficiency promoted mTOR and p70S6K phosphorylation, activated high mobility group box 1 (HMGB1) and TLR4, inhibited prolyl-hydroxylase 1 (PHD1), and increased HIF-1α activity, leading to Foxp3 downregulation and RORγt and IL-17A upregulation in IRI livers. Blocking mTOR or p70S6K in ATF3 knockout (KO) mice or bone marrow-derived macrophages (BMMs) downregulated HMGB1, TLR4, and HIF-1α and upregulated PHD1, increasing Foxp3 and decreasing IL-17A levels in vitro. Silencing of HIF-1α in ATF3 KO mice ameliorated IRI-induced liver damage in parallel with the downregulation of IL-17A in ATF3-deficient mice. These findings demonstrated that ATF3 deficiency activated mTOR/p70S6K/HIF-1α signaling, which was crucial for the modulation of TLR4-driven inflammatory responses and T cell development. The present study provides potential therapeutic targets for the treatment of liver IRI followed by liver transplantation.
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Affiliation(s)
- Qiang Zhu
- Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China.,Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Han Wang
- Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Bin Jiang
- Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Xuhao Ni
- Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Longfeng Jiang
- Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Changyong Li
- Department of Physiology, School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Xuehao Wang
- Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Feng Zhang
- Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Bibo Ke
- The Dumont-UCLA Transplant Center, Division of Liver and Pancreas Transplantation, Department of Surgery, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, CA, USA.
| | - Ling Lu
- Liver Transplantation Center, First Affiliated Hospital, Nanjing Medical University, Nanjing, China.
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18
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Zhang Z, Chen Y, Wang E, Wu L, Wang R, Song Z, Weng Y, Sun Z, Guo Q, Li Y. Sufentanil Alleviates Intrathecal Lidocaine Induced Prolonged Sensory and Motor Impairments but not the Spinal Histological Injury in Rats. Neurochem Res 2018; 43:1104-1110. [PMID: 29704143 DOI: 10.1007/s11064-018-2524-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 04/01/2018] [Accepted: 04/05/2018] [Indexed: 11/25/2022]
Abstract
Spinal anesthesia has evolved into a safe and widely accepted method of anesthesia. Synergy between opioids and local anesthetics further increases the quality of analgesia and decreases the dose requirement of both local anesthetics and opioids. However, over the last decades compelling evidence suggested that lidocaine could be more neurotoxic than other commonly used local anesthetics. Whether opioids can modify the local anesthetics-induced neurotoxicity is largely unexplored. Here, we investigated the effect of sufentanil on the neurotoxicity induced by intrathecal lidocaine in a rat model. Our data showed that 5 µg/ml sufentanil didn't deteriorate nor reduce the histopathological injuries induced by intrathecal application of 10% lidocaine in a rat model. However, it did alleviate sensory and motor function impairments induced by 10% lidocaine. Repeated intrathecal injection of 5 µg/ml sufentanil also decreased the paw withdraw threshold compared to the baseline. An increase in expression of activating transcription factor 3, a stress response gene, as a marker for injured neurons, was also detected in lidocaine-induced neurotoxicity, while 5 µg/ml sufentanil inhibited lidocaine-induced the upregulation of activating transcription factor 3. These results suggest that sufentanil alleviates lidocaine induced sensory and motor impairments, and did not worsen histopathological injury induced by intrathecal lidocaine.
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Affiliation(s)
- Zhong Zhang
- Department of Anesthesiology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Yuan Chen
- Department of Anesthesiology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - E Wang
- Department of Anesthesiology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Lei Wu
- Department of Anesthesiology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Ruike Wang
- Department of Anesthesiology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Zongbin Song
- Department of Anesthesiology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Yingqi Weng
- Department of Anesthesiology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Zhihua Sun
- Department of Anesthesiology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China
| | - Qulian Guo
- Department of Anesthesiology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China.
| | - Yunping Li
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA, 02215, USA.
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19
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Zhang Y, Wang M, Dong H, Yu X, Zhang J. Anti-hypoglycemic and hepatocyte-protective effects of hyperoside from Zanthoxylum bungeanum leaves in mice with high-carbohydrate/high-fat diet and alloxan-induced diabetes. Int J Mol Med 2017; 41:77-86. [PMID: 29115390 PMCID: PMC5746319 DOI: 10.3892/ijmm.2017.3211] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 10/17/2017] [Indexed: 12/12/2022] Open
Abstract
The development of diabetes mellitus (DM) is accompanied by hyperglycemia-induced oxidative stress. Hyperoside is a major bioactive component in Zanthoxylum bungeanum leaves (HZL) and is a natural antioxidant. However, the effects of HZL on DM and its mechanisms of action remain undefined. The present study evaluated the anti-hypoglycemic and hepatocyte-protective effects of HZL in mice with diabetes induced by a high-carbohydrate/high-fat diet (HFD) and alloxan. We also aimed to eludicate the underlying mechanisms. Our resutls demonstrated that the administration of HZL significantly reduced body weight gain, serum glucose levels and insulin levels in diabetic mice compared with the vehicle-treated mice. In addition, the levels of dyslipidemia markers including total cholesterol, triglyceride and low-density lipoprotein cholesterol in the HFD-treated mice were markedly decreased. Further experiments using hepatocytes from mice revealed that HZL significantly attenuated liver injury associated with DM compared with vehicle treatment, as evidenced by lower levels of alanine aminotransferase and aspartate aminotransferase in serum and by lower levels of lipid peroxidation, nitric oxide content and inducible nitric oxide synthase activity in liver tissues. Nuclear factor-κB (NF-κB) and mitogen-associated protein kinase (MAPK) signaling pathways were investigated to elucidate the molecular mechanisms responsible for the protective effects of HZL against diabetic liver injury. The results indicated that HZL inhibited the phosphorylation of p65/NF-κB, MAPK (including p38, JNK and ERK1/2) and activating transcription factor 3 protein expression, with an additional suppression of Bax, cytochrome c, caspase-9 and caspase-3 in the liver tissues of diabetic mice. Taken together, our findings suggest that HZL, which was effective in inhibiting oxidative stress-related pathways may be beneficial for use in the treatment of DM.
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Affiliation(s)
- Yali Zhang
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P.R. China
| | - Mimi Wang
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P.R. China
| | - Huanhuan Dong
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P.R. China
| | - Xiaomin Yu
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P.R. China
| | - Jingfang Zhang
- College of Forestry, Northwest A&F University, Xianyang, Shaanxi 712100, P.R. China
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20
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Fazio EN, Young CC, Toma J, Levy M, Berger KR, Johnson CL, Mehmood R, Swan P, Chu A, Cregan SP, Dilworth FJ, Howlett CJ, Pin CL. Activating transcription factor 3 promotes loss of the acinar cell phenotype in response to cerulein-induced pancreatitis in mice. Mol Biol Cell 2017; 28:2347-2359. [PMID: 28701342 PMCID: PMC5576899 DOI: 10.1091/mbc.e17-04-0254] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 06/22/2017] [Accepted: 06/27/2017] [Indexed: 12/20/2022] Open
Abstract
Pancreatitis is a debilitating disease of the exocrine pancreas that, under chronic conditions, is a major susceptibility factor for pancreatic ductal adenocarcinoma (PDAC). Although down-regulation of genes that promote the mature acinar cell fate is required to reduce injury associated with pancreatitis, the factors that promote this repression are unknown. Activating transcription factor 3 (ATF3) is a key mediator of the unfolded protein response, a pathway rapidly activated during pancreatic insult. Using chromatin immunoprecipitation followed by next-generation sequencing, we show that ATF3 is bound to the transcriptional regulatory regions of >30% of differentially expressed genes during the initiation of pancreatitis. Of importance, ATF3-dependent regulation of these genes was observed only upon induction of pancreatitis, with pathways involved in inflammation, acinar cell differentiation, and cell junctions being specifically targeted. Characterizing expression of transcription factors that affect acinar cell differentiation suggested that acinar cells lacking ATF3 maintain a mature cell phenotype during pancreatitis, a finding supported by maintenance of junctional proteins and polarity markers. As a result, Atf3-/- pancreatic tissue displayed increased tissue damage and inflammatory cell infiltration at early time points during injury but, at later time points, showed reduced acinar-to-duct cell metaplasia. Thus our results reveal a critical role for ATF3 as a key regulator of the acinar cell transcriptional response during injury and may provide a link between chronic pancreatitis and PDAC.
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Affiliation(s)
- Elena N Fazio
- Children's Health Research Institute, London, ON N6C 2V5, Canada
- Department of Paediatrics, University of Western Ontario, London, ON N6A 3K7, Canada
- Department of Oncology, University of Western Ontario, London, ON N6A 3K7, Canada
| | - Claire C Young
- Children's Health Research Institute, London, ON N6C 2V5, Canada
- Department of Paediatrics, University of Western Ontario, London, ON N6A 3K7, Canada
- Department of Physiology and Pharmacology, University of Western Ontario, London, ON N6A 3K7, Canada
| | - Jelena Toma
- Children's Health Research Institute, London, ON N6C 2V5, Canada
- Department of Paediatrics, University of Western Ontario, London, ON N6A 3K7, Canada
- Department of Physiology and Pharmacology, University of Western Ontario, London, ON N6A 3K7, Canada
| | - Michael Levy
- Children's Health Research Institute, London, ON N6C 2V5, Canada
| | - Kurt R Berger
- Children's Health Research Institute, London, ON N6C 2V5, Canada
- Department of Paediatrics, University of Western Ontario, London, ON N6A 3K7, Canada
| | - Charis L Johnson
- Children's Health Research Institute, London, ON N6C 2V5, Canada
- Department of Paediatrics, University of Western Ontario, London, ON N6A 3K7, Canada
| | - Rashid Mehmood
- Children's Health Research Institute, London, ON N6C 2V5, Canada
- Department of Paediatrics, University of Western Ontario, London, ON N6A 3K7, Canada
| | - Patrick Swan
- Department of Physiology and Pharmacology, University of Western Ontario, London, ON N6A 3K7, Canada
- Robarts Research Institute, University of Western Ontario, London, ON N6A 5B7, Canada
| | - Alphonse Chu
- Sprott Centre for Stem Cell Research, Ottawa Hospital Research Institute, Ottawa, ON K1H 8L6, Canada
| | - Sean P Cregan
- Department of Physiology and Pharmacology, University of Western Ontario, London, ON N6A 3K7, Canada
- Robarts Research Institute, University of Western Ontario, London, ON N6A 5B7, Canada
| | - F Jeffrey Dilworth
- Department of Pathology and Laboratory Medicine, University of Western Ontario, London, ON N6A 3K7, Canada
| | - Christopher J Howlett
- Department of Pathology and Laboratory Medicine, University of Western Ontario, London, ON N6A 3K7, Canada
| | - Christopher L Pin
- Children's Health Research Institute, London, ON N6C 2V5, Canada
- Department of Paediatrics, University of Western Ontario, London, ON N6A 3K7, Canada
- Department of Oncology, University of Western Ontario, London, ON N6A 3K7, Canada
- Department of Physiology and Pharmacology, University of Western Ontario, London, ON N6A 3K7, Canada
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Jadhav K, Zhang Y. Activating transcription factor 3 in immune response and metabolic regulation. LIVER RESEARCH 2017; 1:96-102. [PMID: 29242753 PMCID: PMC5724780 DOI: 10.1016/j.livres.2017.08.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Activating transcription factor 3 (ATF3) is a member of the ATF/cAMP-response element binding protein (CREB) family of transcription factors. In response to stress stimuli, ATF3 forms dimers to activate or repress gene expression. Further, ATF3 modulates the immune response, atherogenesis, cell cycle, apoptosis, and glucose homeostasis. Recent studies have shown that ATF3 may also be involved in pathogenesis of other diseases. However, more studies are needed to determine the role of ATF3 in metabolic regulation.
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22
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Sharmin M, Bravo HC, Hannenhalli S. Heterogeneity of transcription factor binding specificity models within and across cell lines. Genome Res 2016; 26:1110-23. [PMID: 27311443 PMCID: PMC4971765 DOI: 10.1101/gr.199166.115] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 06/16/2016] [Indexed: 12/24/2022]
Abstract
Complex gene expression patterns are mediated by the binding of transcription factors (TFs) to specific genomic loci. The in vivo occupancy of a TF is, in large part, determined by the TF's DNA binding interaction partners, motivating genomic context-based models of TF occupancy. However, approaches thus far have assumed a uniform TF binding model to explain genome-wide cell-type–specific binding sites. Therefore, the cell type heterogeneity of TF occupancy models, as well as the extent to which binding rules underlying a TF's occupancy are shared across cell types, has not been investigated. Here, we develop an ensemble-based approach (TRISECT) to identify the heterogeneous binding rules for cell-type–specific TF occupancy and analyze the inter-cell-type sharing of such rules. Comprehensive analysis of 23 TFs, each with ChIP-seq data in four to 12 different cell types, shows that by explicitly capturing the heterogeneity of binding rules, TRISECT accurately identifies in vivo TF occupancy. Importantly, many of the binding rules derived from individual cell types are shared across cell types and reveal distinct yet functionally coherent putative target genes in different cell types. Closer inspection of the predicted cell-type–specific interaction partners provides insights into the context-specific functional landscape of a TF. Together, our novel ensemble-based approach reveals, for the first time, a widespread heterogeneity of binding rules, comprising the interaction partners within a cell type, many of which nevertheless transcend cell types. Notably, the putative targets of shared binding rules in different cell types, while distinct, exhibit significant functional coherence.
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Affiliation(s)
- Mahfuza Sharmin
- Department of Computer Science, University of Maryland, College Park, Maryland 20742, USA; Center for Bioinformatics and Computational Biology, University of Maryland, College Park, Maryland 20742, USA
| | - Héctor Corrada Bravo
- Department of Computer Science, University of Maryland, College Park, Maryland 20742, USA; Center for Bioinformatics and Computational Biology, University of Maryland, College Park, Maryland 20742, USA
| | - Sridhar Hannenhalli
- Center for Bioinformatics and Computational Biology, University of Maryland, College Park, Maryland 20742, USA; Department of Cell and Molecular Biology, University of Maryland, College Park, Maryland 20742, USA
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23
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Kirchner H, Sinha I, Gao H, Ruby MA, Schönke M, Lindvall JM, Barrès R, Krook A, Näslund E, Dahlman-Wright K, Zierath JR. Altered DNA methylation of glycolytic and lipogenic genes in liver from obese and type 2 diabetic patients. Mol Metab 2016; 5:171-183. [PMID: 26977391 PMCID: PMC4770265 DOI: 10.1016/j.molmet.2015.12.004] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Revised: 12/23/2015] [Accepted: 12/27/2015] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE Epigenetic modifications contribute to the etiology of type 2 diabetes. METHOD We performed genome-wide methylome and transcriptome analysis in liver from severely obese men with or without type 2 diabetes and non-obese men to discover aberrant pathways underlying the development of insulin resistance. Results were validated by pyrosequencing. RESULT We identified hypomethylation of genes involved in hepatic glycolysis and insulin resistance, concomitant with increased mRNA expression and protein levels. Pyrosequencing revealed the CpG-site within ATF-motifs was hypomethylated in four of these genes in liver of severely obese non-diabetic and type 2 diabetic patients, suggesting epigenetic regulation of transcription by altered ATF-DNA binding. CONCLUSION Severely obese non-diabetic and type 2 diabetic patients have distinct alterations in the hepatic methylome and transcriptome, with hypomethylation of several genes controlling glucose metabolism within the ATF-motif regulatory site. Obesity appears to shift the epigenetic program of the liver towards increased glycolysis and lipogenesis, which may exacerbate the development of insulin resistance.
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Affiliation(s)
- Henriette Kirchner
- Section of Integrative Physiology, Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Indranil Sinha
- Department Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Hui Gao
- Department Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Maxwell A Ruby
- Section of Integrative Physiology, Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Milena Schönke
- Section of Integrative Physiology, Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Jessica M Lindvall
- Department Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Romain Barrès
- Section of Integrative Physiology, The Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark
| | - Anna Krook
- Section of Integrative Physiology, Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Erik Näslund
- Division of Surgery, Department of Clinical Sciences, Danderyd Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Karin Dahlman-Wright
- Department Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden; SciLifeLab, Science for Life Laboratory, Karolinska Institutet, Solna, Sweden
| | - Juleen R Zierath
- Section of Integrative Physiology, Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden; Section of Integrative Physiology, The Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark; Section of Integrative Physiology, Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden.
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24
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Shan Y, Akram A, Amatullah H, Zhou DY, Gali PL, Maron-Gutierrez T, González-López A, Zhou L, Rocco PR, Hwang D, Albaiceta GM, Haitsma JJ, dos Santos CC. ATF3 protects pulmonary resident cells from acute and ventilator-induced lung injury by preventing Nrf2 degradation. Antioxid Redox Signal 2015; 22:651-68. [PMID: 25401197 PMCID: PMC4346377 DOI: 10.1089/ars.2014.5987] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
AIMS Ventilator-induced lung injury (VILI) contributes to mortality in patients with acute respiratory distress syndrome, the most severe form of acute lung injury (ALI). Absence of activating transcription factor 3 (ATF3) confers susceptibility to ALI/VILI. To identify cell-specific ATF3-dependent mechanisms of susceptibility to ALI/VILI, we generated ATF3 chimera by adoptive bone marrow (BM) transfer and randomized to inhaled saline or lipopolysacharide (LPS) in the presence of mechanical ventilation (MV). Adenovirus vectors to silence or overexpress ATF3 were used in primary human bronchial epithelial cells and murine BM-derived macrophages from wild-type or ATF3-deficient mice. RESULTS Absence of ATF3 in myeloid-derived cells caused increased pulmonary cellular infiltration. In contrast, absence of ATF3 in parenchymal cells resulted in loss of alveolar-capillary membrane integrity and increased exudative edema. ATF3-deficient macrophages were unable to limit the expression of pro-inflammatory mediators. Knockdown of ATF3 in resident cells resulted in decreased junctional protein expression and increased paracellular leak. ATF3 overexpression abrogated LPS induced membrane permeability. Despite release of ATF3-dependent Nrf2 transcriptional inhibition, mice that lacked ATF3 expression in resident cells had increased Nrf2 protein degradation. INNOVATION In our model, in the absence of ATF3 in parenchymal cells increased Nrf2 degradation is the result of increased Keap-1 expression and loss of DJ-1 (Parkinson disease [autosomal recessive, early onset] 7), previously not known to play a role in lung injury. CONCLUSION Results suggest that ATF3 confers protection to lung injury by preventing inflammatory cell recruitment and barrier disruption in a cell-specific manner, opening novel opportunities for cell specific therapy for ALI/VILI.
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Affiliation(s)
- Yuexin Shan
- Interdepartmental Division of Critical Care, The Keenan Research Centre of the Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto, Toronto, Canada
| | - Ali Akram
- Interdepartmental Division of Critical Care, The Keenan Research Centre of the Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto, Toronto, Canada
| | - Hajera Amatullah
- Interdepartmental Division of Critical Care, The Keenan Research Centre of the Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto, Toronto, Canada
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Dun Yuan Zhou
- Interdepartmental Division of Critical Care, The Keenan Research Centre of the Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto, Toronto, Canada
- Institute of Medical Sciences, Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Patricia L. Gali
- Interdepartmental Division of Critical Care, The Keenan Research Centre of the Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto, Toronto, Canada
| | - Tatiana Maron-Gutierrez
- Interdepartmental Division of Critical Care, The Keenan Research Centre of the Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto, Toronto, Canada
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Adrian González-López
- Interdepartmental Division of Critical Care, The Keenan Research Centre of the Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto, Toronto, Canada
- Departamento de Biología Funcional, Instituto Universitario de Oncología del Principado de Asturias, Universidad de Oviedo, Oviedo, Spain
| | - Louis Zhou
- Interdepartmental Division of Critical Care, The Keenan Research Centre of the Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto, Toronto, Canada
| | - Patricia R.M. Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - David Hwang
- Department of Clinical Pathology, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Canada
| | - Guillermo M. Albaiceta
- Departamento de Biología Funcional, Instituto Universitario de Oncología del Principado de Asturias, Universidad de Oviedo, Oviedo, Spain
| | - Jack J. Haitsma
- Interdepartmental Division of Critical Care, The Keenan Research Centre of the Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto, Toronto, Canada
- Department of Anesthesiology and Intensive Care, Lund University Hospital, Lund, Sweden
| | - Claudia C. dos Santos
- Interdepartmental Division of Critical Care, The Keenan Research Centre of the Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto, Toronto, Canada
- Institute of Medical Sciences, Faculty of Medicine, University of Toronto, Toronto, Canada
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25
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Guo N, Meng C, Bai W, Wei Q, Shi F, Davis JS, Mao D. Prostaglandin F2α induces expression of activating transcription factor 3 (ATF3) and activates MAPK signaling in the rat corpus luteum. Acta Histochem 2015; 117:211-8. [PMID: 25614048 DOI: 10.1016/j.acthis.2014.12.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 12/24/2014] [Accepted: 12/29/2014] [Indexed: 12/11/2022]
Abstract
The current study was conducted to evaluate the expression of ATF3, in association with the activation of mitogen-activated protein kinases (MAPK) during prostaglandin F2α analog (PGF)-induced luteal regression in rats. A sequential PMSG/hCG treatment paradigm was used to obtain a single, well-defined generation of corpora lutea (CL) in rats. Rats were treated with PGF for 0-4h on day 7 of pseudopregnancy. Results showed that serum progesterone (P4) concentrations declined in a time dependent manner. Western blot results revealed that ATF3 increased within 2h post-PGF injection. Phosphorylated ERK1/2 (p-ERK) and JNK (p-JNK) increased within 30min and then were gradually reduced in response to PGF. In contrast, the levels of phosphorylated p38 MAPK (p-p38) were not significantly altered. The immunostaining density for p-ERK decreased from the periphery to the center of the corpus luteum following treatment with PGF, while ATF3 was expressed uniformly in the nuclei of luteal steroidogenic cells. These results indicated that treatment with PGF in vivo could induce increases in MAPK phosphorylation, especially in p-ERK, which might be correlated with the increases in ATF3 expression and the decline in P4 concentrations. To our knowledge, this is the first study to provide evidence for temporal relationships between MAPK activation and ATF3 expression during PGF-induced luteal regression in the rat.
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Affiliation(s)
- Nannan Guo
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Chenling Meng
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Wujiao Bai
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Quanwei Wei
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - Fangxiong Shi
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China
| | - John S Davis
- VA Nebraska-Western Iowa Health Care System and Department of Obstetrics and Gynecology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Dagan Mao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China.
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26
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Oarada M, Takahashi-Nakaguchi A, Abe T, Nikawa T, Miki T, Gonoi T. Refeeding with glucose rather than fructose elicits greater hepatic inflammatory gene expression in mice. Nutrition 2014; 31:757-65. [PMID: 25837224 DOI: 10.1016/j.nut.2014.11.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 11/14/2014] [Accepted: 11/24/2014] [Indexed: 11/28/2022]
Abstract
OBJECTIVE We previously reported that refeeding after a 48-h fast, used as a study model of starvation and refeeding, promotes acute liver inflammatory gene expression, which is at least partly mediated by toll-like receptor 2 (TLR2). We also previously demonstrated that dietary carbohydrates play critical roles in this process. The aim of this study was to compare the outcomes of refeeding with different carbohydrate sources. METHODS Mice were fasted for 46 h and then refed with 1.5% (w/w) agar gel containing 19% carbohydrate (sources: α-cornstarch, glucose, sucrose, or fructose). The liver expression of inflammatory and other specific genes was then sequentially measured for the first 14 h after refeeding initiation. RESULTS Fasting for 46 h up-regulated the liver expression of endogenous ligands for TLRs (HspA5, Hsp90 aa1, and Hspd1). Refeeding with agar gel containing α-cornstarch or glucose increased the liver expression of Tlr2, proinflammatory genes (Cxcl2, Cxcl10, Cxcl1, Nfkb1, Nfkb2, RelB, Sectm1α, Il1β), stress response genes (Atf3, Asns, Gadd45 a, Perk, Inhbe), detoxification genes (Hmox1, Gsta1, Abca8b), genes involved in tissue regeneration (Gdf15, Krt23, Myc, Tnfrsf12a, Mthfd2), and genes involved in tumor suppression (p53, Txnrd1, Btg2). This refeeding also moderately but significantly elevated the serum levels of alanine aminotransferase. These effects were attenuated in mice refed with agar gel containing sucrose or fructose. CONCLUSION Dietary glucose, rather than fructose, plays a critical role in refeeding-induced acute liver inflammatory gene expression and moderate hepatocyte destruction. Further studies are recommended regarding the role of these effects in liver inflammation and, consequently, liver dysfunction.
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Affiliation(s)
- Motoko Oarada
- Medical Mycology Research Center, Chiba University, Chiba, Japan.
| | | | - Tomoki Abe
- Department of Nutrition, Tokushima University School of Medicine, Tokushima, Japan
| | - Takeshi Nikawa
- Department of Nutrition, Tokushima University School of Medicine, Tokushima, Japan
| | - Takashi Miki
- Department of Medical Physiology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Tohru Gonoi
- Medical Mycology Research Center, Chiba University, Chiba, Japan
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27
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Hao ZF, Su YM, Wang CM, Yang RY. Activating transcription factor 3 interferes with p21 activation in histone deacetylase inhibitor-induced growth inhibition of epidermoid carcinoma cells. Tumour Biol 2014; 36:1471-6. [PMID: 25371069 DOI: 10.1007/s13277-014-2618-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 09/09/2014] [Indexed: 12/31/2022] Open
Abstract
Inhibition of histone deacetylase (HDAC) activity by HDAC inhibitors (HDACis) results in cancer cell growth inhibition, and HDACis have been revealed as potential anti-skin cancer agents. p21 is a cyclin-dependent kinase inhibitor and an essential regulator of growth inhibition. Recently, we reported that activating transcription factor 3 (ATF3) could significantly promote skin cancer cell growth. This study explored the relationship between ATF3 and HDACi-induced growth inhibition of epidermoid carcinoma cells. We found that trichostatin A (TSA) treatment inhibited cell growth in A431 epidermoid carcinoma cells in a dose-dependent manner. Simultaneously, p21 and ATF3 expression levels were upregulated and downregulated upon TSA stimulation, respectively. ATF3 overexpression promoted cell growth and downregulated p21 expression. In contrast, ATF3 depletion resulted in cell growth reduction and p21 transcriptional upregulation. More importantly, ATF3 overexpression partially antagonized TSA-induced growth inhibition and p21 activation. Collectively, these data demonstrate that ATF3 acts as an essential negative regulator of TSA-induced cell growth inhibition through interfering with TSA-induced p21 activation.
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Affiliation(s)
- Zhen-Feng Hao
- Institute of Skin Damage and Repair, General Hospital of Beijing Region of PLA, Beijing, 100700, China
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28
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Hao ZF, Ao JH, Zhang J, Su YM, Yang RY. ATF3 activates Stat3 phosphorylation through inhibition of p53 expression in skin cancer cells. Asian Pac J Cancer Prev 2014; 14:7439-44. [PMID: 24460316 DOI: 10.7314/apjcp.2013.14.12.7439] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
AIM ATF3, a member of the ATF/CREB family of transcription factors, has been found to be selectively induced by calcineurin/NFAT inhibition and to enhance keratinocyte tumor formation, although the precise role of ATF3 in human skin cancer and possible mechanisms remain unknown. METHODS In this study, clinical analysis of 30 skin cancer patients and 30 normal donors revealed that ATF3 was accumulated in skin cancer tissues. Functional assays demonstrated that ATF3 significantly promoted skin cancer cell proliferation. RESULTS Mechanically, ATF3 activated Stat3 phosphorylation in skin cancer cell through regulation of p53 expression. Moreover, the promotion effect of ATF3 on skin cancer cell proliferation was dependent on the p53-Stat3 signaling cascade. CONCLUSION Together, the results indicate that ATF3 might promote skin cancer cell proliferation and enhance skin keratinocyte tumor development through inhibiting p53 expression and then activating Stat3 phosphorylation.
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Affiliation(s)
- Zhen-Feng Hao
- Graduate Management Brigade, Third Military Medical University, Chongqing, China E-mail :
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29
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Andreeva K, Zhang M, Fan W, Li X, Chen Y, Rebolledo-Mendez JD, Cooper NG. Time-dependent Gene Profiling Indicates the Presence of Different Phases for Ischemia/Reperfusion Injury in Retina. OPHTHALMOLOGY AND EYE DISEASES 2014; 6:43-54. [PMID: 25210480 PMCID: PMC4149383 DOI: 10.4137/oed.s17671] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Revised: 07/09/2014] [Accepted: 07/10/2014] [Indexed: 02/05/2023]
Abstract
Ischemia/reperfusion (IR) injury has been associated with several retinal pathologies, and a few genes/gene products have been linked to IR injury. However, the big picture of temporal changes, regarding the affected gene networks, pathways, and processes remains to be determined. The purpose of the present study was to investigate initial, intermediate, and later stages to characterize the etiology of IR injury in terms of the pathways affected over time. Analyses indicated that at the initial stage, 0-hour reperfusion following the ischemic period, the ischemia-associated genes were related to changes in metabolism. In contrast, at the 24-hour time point, the signature events in reperfusion injury include enhanced inflammatory and immune responses as well as cell death indicating that this would be a critical period for the development of any interventional therapeutic strategies. Genes in the signal transduction pathways, particularly transmitter receptors, are downregulated at this time. Activation of the complement system pathway clearly plays an important role in the later stages of reperfusion injury. Together, these results demonstrate that the etiology of injury related to IR is characterized by the appearance of specific patterns of gene expression at any given time point during retinal IR injury. These results indicate that evaluation of treatment strategies with respect to time is very critical.
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Affiliation(s)
- Kalina Andreeva
- Department of Anatomical Sciences and Neurobiology, University of Louisville, School of Medicine, Louisville, KY, USA
| | - Meixia Zhang
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Wei Fan
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Xiaohong Li
- Department of Anatomical Sciences and Neurobiology, University of Louisville, School of Medicine, Louisville, KY, USA
| | - Yinlu Chen
- Department of Anatomical Sciences and Neurobiology, University of Louisville, School of Medicine, Louisville, KY, USA
| | - Jovan D Rebolledo-Mendez
- Department of Anatomical Sciences and Neurobiology, University of Louisville, School of Medicine, Louisville, KY, USA
| | - Nigel G Cooper
- Department of Anatomical Sciences and Neurobiology, University of Louisville, School of Medicine, Louisville, KY, USA
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30
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Elizalde M, Urtasun R, Azkona M, Latasa MU, Goñi S, García-Irigoyen O, Uriarte I, Segura V, Collantes M, Di Scala M, Lujambio A, Prieto J, Ávila MA, Berasain C. Splicing regulator SLU7 is essential for maintaining liver homeostasis. J Clin Invest 2014; 124:2909-20. [PMID: 24865429 DOI: 10.1172/jci74382] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Accepted: 03/28/2014] [Indexed: 12/13/2022] Open
Abstract
A precise equilibrium between cellular differentiation and proliferation is fundamental for tissue homeostasis. Maintaining this balance is particularly important for the liver, a highly differentiated organ with systemic metabolic functions that is endowed with unparalleled regenerative potential. Carcinogenesis in the liver develops as the result of hepatocellular de-differentiation and uncontrolled proliferation. Here, we identified SLU7, which encodes a pre-mRNA splicing regulator that is inhibited in hepatocarcinoma, as a pivotal gene for hepatocellular homeostasis. SLU7 knockdown in human liver cells and mouse liver resulted in profound changes in pre-mRNA splicing and gene expression, leading to impaired glucose and lipid metabolism, refractoriness to key metabolic hormones, and reversion to a fetal-like gene expression pattern. Additionally, loss of SLU7 also increased hepatocellular proliferation and induced a switch to a tumor-like glycolytic phenotype. Slu7 governed the splicing and/or expression of multiple genes essential for hepatocellular differentiation, including serine/arginine-rich splicing factor 3 (Srsf3) and hepatocyte nuclear factor 4α (Hnf4α), and was critical for cAMP-regulated gene transcription. Together, out data indicate that SLU7 is central regulator of hepatocyte identity and quiescence.
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Age-related brain expression and regulation of the chemokine CCL4/MIP-1β in APP/PS1 double-transgenic mice. J Neuropathol Exp Neurol 2014; 73:362-74. [PMID: 24607962 DOI: 10.1097/nen.0000000000000060] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The detrimental effect of activation of the chemokine CCL4/MIP-1β on neuronal integrity in patients with HIV-associated dementia has directed attention to the potential role of CCL4 expression and regulation in Alzheimer disease. Here, we show that CCL4 mRNA and protein are overexpressed in the brains of APPswe/PS1ΔE9 (APP/PS1) double-transgenic mice, a model of cerebral amyloid deposition; expression was minimal in brains from nontransgenic littermates or single-mutant controls. Increased levels of CCL4 mRNA and protein directly correlated with the age-related progression of cerebral amyloid-β (Aβ) levels in APP/PS1 mice. We also found significantly increased expression of activating transcription factor 3 (ATF3), which was positively correlated with age-related Aβ deposition and CCL4 in the brains of APP/PS1 mice. Results from chromatin immunoprecipitation-quantitative polymerase chain reaction confirmed that ATF3 binds to the promoter region of the CCL4 gene, consistent with a potential role in regulating CCL4 transcription. Finally, elevated ATF3 mRNA expression in APP/PS1 brains was associated with hypomethylation of the ATF3 gene promoter region. These observations prompt the testable hypothesis for future study that CCL4 overexpression, regulated in part by hypomethylation of the ATF3 gene, may contribute to neuropathologic progression associated with amyloid deposition in Alzheimer disease.
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Sato A, Nakama K, Watanabe H, Satake A, Yamamoto A, Omi T, Hiramoto A, Masutani M, Wataya Y, Kim HS. Role of activating transcription factor 3 protein ATF3 in necrosis and apoptosis induced by 5-fluoro-2'-deoxyuridine. FEBS J 2014; 281:1892-900. [PMID: 24529083 DOI: 10.1111/febs.12752] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Revised: 01/11/2014] [Accepted: 02/10/2014] [Indexed: 11/26/2022]
Abstract
Necrosis and apoptosis are the two major forms of cell death. We have studied the mechanisms that regulate the cell death observed during treatment of mouse cancer cell line FM3A with the anticancer drug 5-fluoro-2'-deoxyuridine (FUdR). To detect causal differences between necrosis and apoptosis, we exploited the necrosis in original clone F28-7 and the apoptosis in its variant F28-7-A that occur on treatment with FUdR. Activating transcription factor 3 (ATF3) was strongly induced during necrosis but not apoptosis. In addition, we found that ATF3 expression is regulated by heat shock protein 90 (HSP90) at the mRNA stage. Knockdown of Atf3 by siRNA in the F28-7 cells resulted in apoptotic morphology rather than necrotic morphology. These results suggest that ATF3 is a cell-death regulator in necrosis and apoptosis.
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Affiliation(s)
- Akira Sato
- Faculty of Pharmaceutical Sciences, Okayama University, Kita-ku, Japan; Division of Genome Stability Research, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan
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Lai X, Kang X, Zeng L, Li J, Yang Y, Liu D. The protective effects and genetic pathways of thorn grape seeds oil against high glucose-induced apoptosis in pancreatic β-cells. Altern Ther Health Med 2014; 14:10. [PMID: 24405938 PMCID: PMC3893577 DOI: 10.1186/1472-6882-14-10] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 01/07/2014] [Indexed: 01/26/2023]
Abstract
Background Excessive apoptosis of β-cell is closely related to diabetes mellitus. Chronic exposure to high glucose causes β-cell dysfunction and apoptosis in diabetes. Thorn grape (Vitis davidii Foex.) has been used to treat diabetes in Traditional Chinese medicine for many years. In our previous research, thorn grape seeds oil (TGSO) showed promising anti-diabetic effects in animal models. However, it is unknown whether TGSO played an anti-apoptotic role in the anti-diabetic effects and the mechanism regarding signal transduction pathway is unclear either. Methods The rattus pancreatic β-cell line RIN-m5F was treated with/without TGSO which was extracted by supercritical carbon dioxide (CO2) fluid extraction and analyzed by Gas Chromatography/Mass Spectrometry (GC/MS). Cell apoptosis was detected by fluorescence activated cell sorting (FACS), insulin secretion was assayed by Enzyme-Linked Immunosorbent Assay (ELISA), and the apoptosis-related genes expressions were evaluated by quantitative Reverse Transcription Polymerase Chain Reaction (qRT-PCR). Results TGSO, containing 87.02% unsaturated fatty acids (UFAs), significantly reduced pancreatic β-cell apoptosis and protected the insulin secretion impaired by high glucose. The expressions of pro-apoptotic genes such as iNOS, Caspase-3, ATF-3, JNK, p38 and Fas were down-regulated while the anti-apoptotic genes Akt and Bcl-2/Bax were up-regulated. Conclusions The results indicated that TGSO protected β-cells from high glucose-induced apoptosis and its protective activity may be linked to mitochondrial pathway, endoplasmic reticulum (ER) stress pathway and Fas signal pathway, which implied that TGSO might be an effective complementary or alternative medicine to reduce β-cell apoptosis and dysfunction.
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A Taiwanese Propolis Derivative Induces Apoptosis through Inducing Endoplasmic Reticular Stress and Activating Transcription Factor-3 in Human Hepatoma Cells. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:658370. [PMID: 24222778 PMCID: PMC3814109 DOI: 10.1155/2013/658370] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2013] [Accepted: 09/01/2013] [Indexed: 12/22/2022]
Abstract
Activating transcription factor-(ATF-) 3, a stress-inducible transcription factor, is rapidly upregulated under various stress conditions and plays an important role in inducing cancer cell apoptosis. NBM-TP-007-GS-002 (GS-002) is a Taiwanese propolin G (PPG) derivative. In this study, we examined the antitumor effects of GS-002 in human hepatoma Hep3B and HepG2 cells in vitro. First, we found that GS-002 significantly inhibited cell proliferation and induced cell apoptosis in dose-dependent manners. Several main apoptotic indicators were found in GS-002-treated cells, such as the cleaved forms of caspase-3, caspase-9, and poly(ADP-ribose) polymerase (PARP). GS-002 also induced endoplasmic reticular (ER) stress as evidenced by increases in ER stress-responsive proteins including glucose-regulated protein 78 (GRP78), growth arrest- and DNA damage-inducible gene 153 (GADD153), phosphorylated eukaryotic initiation factor 2α (eIF2α), phosphorylated protein endoplasmic-reticular-resident kinase (PERK), and ATF-3. The induction of ATF-3 expression was mediated by mitogen-activated protein kinase (MAPK) signaling pathways in GS-002-treated cells. Furthermore, we found that GS-002 induced more cell apoptosis in ATF-3-overexpressing cells. These results suggest that the induction of apoptosis by the propolis derivative, GS-002, is partially mediated through ER stress and ATF-3-dependent pathways, and GS-002 has the potential for development as an antitumor drug.
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Zhang T, Guo X, Chen Y. Retinoic acid-activated Ndrg1a represses Wnt/β-catenin signaling to allow Xenopus pancreas, oesophagus, stomach, and duodenum specification. PLoS One 2013; 8:e65058. [PMID: 23741453 PMCID: PMC3669096 DOI: 10.1371/journal.pone.0065058] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Accepted: 04/22/2013] [Indexed: 12/14/2022] Open
Abstract
How cells integrate multiple patterning signals to achieve early endoderm regionalization remains largely unknown. Between gastrulation and neurulation, retinoic acid (RA) signaling is required, while Wnt/β-catenin signaling has to be repressed for the specification of the pancreas, oesophagus, stomach, and duodenum primordia in Xenopus embryos. In attempt to screen for RA regulated genes in Xenopus endoderm, we identified a direct RA target gene, N-myc downstream regulated gene 1a (ndrg1a) that showed expression early in the archenteron roof endoderm and late in the developing pancreas, oesophagus, stomach, and duodenum. Both antisense morpholino oligonucleotide mediated knockdown of ndrg1a in Xenopus laevis and the transcription activator-like effector nucleases (TALEN) mediated disruption of ndrg1 in Xenopus tropicalis demonstrate that like RA signaling, Ndrg1a is specifically required for the specification of Xenopus pancreas, oesophagus, stomach, and duodenum primordia. Immunofluorescence data suggest that RA-activated Ndrg1a suppresses Wnt/β-catenin signaling in Xenopus archenteron roof endoderm cells. Blocking Wnt/β-catenin signaling rescued Ndrg1a knockdown phenotype. Furthermore, overexpression of the putative Wnt/β-catenin target gene Atf3 phenocopied knockdown of Ndrg1a or inhibition of RA signaling, while Atf3 knockdown can rescue Ndrg1a knockdown phenotype. Lastly, the pancreas/stomach/duodenum transcription factor Pdx1 was able to rescue Atf3 overexpression or Ndrg1a knockdown phenotype. Together, we conclude that RA activated Ndrg1a represses Wnt/β-catenin signaling to allow the specification of pancreas, oesophagus, stomach, and duodenum progenitor cells in Xenopus embryos.
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Affiliation(s)
- Tiejun Zhang
- Key Laboratory of Regenerative Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou, China
- Graduate University of Chinese Academy of Sciences, Beijing, China
| | - Xiaogang Guo
- Key Laboratory of Regenerative Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou, China
| | - Yonglong Chen
- Key Laboratory of Regenerative Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Guangzhou, China
- * E-mail:
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Lindaman LL, Yeh DM, Xie C, Breen KM, Coss D. Phosphorylation of ATF2 and interaction with NFY induces c-Jun in the gonadotrope. Mol Cell Endocrinol 2013. [PMID: 23178797 PMCID: PMC3529762 DOI: 10.1016/j.mce.2012.11.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Induction of c-Jun and c-Fos, partners that comprise the AP1 transcription factor, is critical for GnRH regulation of FSHβ gene expression. The signaling pathways that are necessary for regulation of AP1 in the gonadotrope cell are not known. Here, we investigate the mechanism of c-Jun induction by GnRH, the sole regulator of c-Jun in the gonadotrope. We identify that GnRH phosphorylates ATF2 via p38 and JNK, the same pathways responsible for GnRH induction of c-Jun. Upon phosphorylation, ATF2 binds the CRE element within the c-Jun proximal promoter and interacts with NFY. Functional ATF2 is necessary for both GnRH induction of c-Jun and FSHβ. Taken together, these studies elucidate the specificity of c-Jun induction by GnRH in the gonadotrope by demonstrating GnRH activation of the p38 and JNK signaling pathways that lead to phosphorylation of ATF2, providing critical insight into GnRH regulation of its target gene, the gonadotropin subunit FSHβ.
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Affiliation(s)
- Lacey L Lindaman
- Department of Reproductive Medicine, Center for Reproductive Science and Medicine, University of California San Diego, La Jolla, CA 92093-0674, USA.
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Oarada M, Miki T, Kohno S, Sakai K, Nikawa T, Yoneyama M, Gonoi T. Refeeding with a standard diet after a 48-h fast elicits an inflammatory response in the mouse liver. J Nutr Biochem 2013; 24:1314-23. [PMID: 23333091 DOI: 10.1016/j.jnutbio.2012.10.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Revised: 09/21/2012] [Accepted: 10/15/2012] [Indexed: 12/21/2022]
Abstract
Unhealthy eating behaviors increase the risk of metabolic diseases, but the underlying mechanisms are not fully elucidated. Because inflammation contributes to the pathogenesis of metabolic diseases, it is important to understand the effects of unhealthy eating on the inflammatory state. The objective of our present study was to address the effects of a fasting-refeeding regime, a model of irregular eating, on the hepatic inflammatory responses in mouse. The animals were fasted for 48 h and then refed either a standard or low-carbohydrate/high-fat diet. Inflammatory gene expression in the liver was then sequentially measured for the first 17 h after initiation of refeeding. To assess the roles of dietary carbohydrates and toll-like receptor 2 (TLR2) in the refeeding-induced inflammatory changes, gene expression levels in mice refed only carbohydrates (α-corn starch and sucrose) at different doses and in TLR2-deficient mice refed a standard diet were also analyzed. Refeeding with a standard diet increased the liver expression of Tlr2, proinflammatory mediators (Cxcl10, Cxcl1, Cxcl2, Icam-1) and negative regulators of TLR-signaling (A20 and Atf3). These increases were attenuated in mice refed a low-carbohydrate/high-fat diet. Refeeding only α-corn starch and sucrose also increased the expression of these inflammatory pathway genes depending on the doses. TLR2 deficiency significantly attenuated the refeeding-induced increase in the liver expression of Cxcl10, Cxcl1, Icam-1 and A20. These findings suggest that an irregular eating behavior can elicit a liver inflammatory response, which is at least partly mediated by TLR2, and that dietary carbohydrates play critical roles in this process.
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Affiliation(s)
- Motoko Oarada
- Medical Mycology Research Center, Chiba University, Chiba 260-8673, Japan.
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Sárközy M, Zvara Á, Gyémánt N, Fekete V, Kocsis GF, Pipis J, Szűcs G, Csonka C, Puskás LG, Ferdinandy P, Csont T. Metabolic syndrome influences cardiac gene expression pattern at the transcript level in male ZDF rats. Cardiovasc Diabetol 2013; 12:16. [PMID: 23320804 PMCID: PMC3599923 DOI: 10.1186/1475-2840-12-16] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2012] [Accepted: 01/05/2013] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Metabolic syndrome (coexisting visceral obesity, dyslipidemia, hyperglycemia, and hypertension) is a prominent risk factor for cardiovascular morbidity and mortality, however, its effect on cardiac gene expression pattern is unclear. Therefore, we examined the possible alterations in cardiac gene expression pattern in male Zucker Diabetic Fatty (ZDF) rats, a model of metabolic syndrome. METHODS Fasting blood glucose, serum insulin, cholesterol and triglyceride levels were measured at 6, 16, and 25 wk of age in male ZDF and lean control rats. Oral glucose tolerance test was performed at 16 and 25 wk of age. At week 25, total RNA was isolated from the myocardium and assayed by rat oligonucleotide microarray for 14921 genes. Expression of selected genes was confirmed by qRT-PCR. RESULTS Fasting blood glucose, serum insulin, cholesterol and triglyceride levels were significantly increased, glucose tolerance and insulin sensitivity were impaired in ZDF rats compared to leans. In hearts of ZDF rats, 36 genes showed significant up-regulation and 49 genes showed down-regulation as compared to lean controls. Genes with significantly altered expression in the heart due to metabolic syndrome includes functional clusters of metabolism (e.g. 3-hydroxy-3-methylglutaryl-Coenzyme A synthase 2; argininosuccinate synthetase; 2-amino-3-ketobutyrate-coenzyme A ligase), structural proteins (e.g. myosin IXA; aggrecan1), signal transduction (e.g. activating transcription factor 3; phospholipase A2; insulin responsive sequence DNA binding protein-1) stress response (e.g. heat shock 70kD protein 1A; heat shock protein 60; glutathione S-transferase Yc2 subunit), ion channels and receptors (e.g. ATPase, (Na+)/K+ transporting, beta 4 polypeptide; ATPase, H+/K+ transporting, nongastric, alpha polypeptide). Moreover some other genes with no definite functional clusters were also changed such as e.g. S100 calcium binding protein A3; ubiquitin carboxy-terminal hydrolase L1; interleukin 18. Gene ontology analysis revealed several significantly enriched functional inter-relationships between genes influenced by metabolic syndrome. CONCLUSIONS Metabolic syndrome significantly alters cardiac gene expression profile which may be involved in development of cardiac pathologies in the presence of metabolic syndrome.
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Affiliation(s)
- Márta Sárközy
- Cardiovascular Research Group, Department of Biochemistry, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Ágnes Zvara
- Department of Functional Genomics, Biological Research Center, Szeged, Hungary
| | - Nóra Gyémánt
- Cardiovascular Research Group, Department of Biochemistry, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Veronika Fekete
- Cardiovascular Research Group, Department of Biochemistry, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Gabriella F Kocsis
- Cardiovascular Research Group, Department of Biochemistry, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Judit Pipis
- Cardiovascular Research Group, Department of Biochemistry, Faculty of Medicine, University of Szeged, Szeged, Hungary
- Pharmahungary Group, Szeged, Hungary
| | - Gergő Szűcs
- Cardiovascular Research Group, Department of Biochemistry, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Csaba Csonka
- Cardiovascular Research Group, Department of Biochemistry, Faculty of Medicine, University of Szeged, Szeged, Hungary
- Pharmahungary Group, Szeged, Hungary
| | - László G Puskás
- Department of Functional Genomics, Biological Research Center, Szeged, Hungary
| | - Péter Ferdinandy
- Pharmahungary Group, Szeged, Hungary
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Budapest, Hungary
| | - Tamás Csont
- Cardiovascular Research Group, Department of Biochemistry, Faculty of Medicine, University of Szeged, Szeged, Hungary
- Pharmahungary Group, Szeged, Hungary
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Rynes J, Donohoe CD, Frommolt P, Brodesser S, Jindra M, Uhlirova M. Activating transcription factor 3 regulates immune and metabolic homeostasis. Mol Cell Biol 2012; 32:3949-62. [PMID: 22851689 PMCID: PMC3457521 DOI: 10.1128/mcb.00429-12] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 07/18/2012] [Indexed: 12/20/2022] Open
Abstract
Integration of metabolic and immune responses during animal development ensures energy balance, permitting both growth and defense. Disturbed homeostasis causes organ failure, growth retardation, and metabolic disorders. Here, we show that the Drosophila melanogaster activating transcription factor 3 (Atf3) safeguards metabolic and immune system homeostasis. Loss of Atf3 results in chronic inflammation and starvation responses mounted primarily by the larval gut epithelium, while the fat body suffers lipid overload, causing energy imbalance and death. Hyperactive proinflammatory and stress signaling through NF-κB/Relish, Jun N-terminal kinase, and FOXO in atf3 mutants deregulates genes important for immune defense, digestion, and lipid metabolism. Reducing the dose of either FOXO or Relish normalizes both lipid metabolism and gene expression in atf3 mutants. The function of Atf3 is conserved, as human ATF3 averts some of the Drosophila mutant phenotypes, improving their survival. The single Drosophila Atf3 may incorporate the diversified roles of two related mammalian proteins.
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Affiliation(s)
- Jan Rynes
- Institute for Genetics and Cologne Excellence Cluster in Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
- Department of Molecular Biology, University of South Bohemia, Ceske Budejovice, Czech Republic
| | - Colin D. Donohoe
- Institute for Genetics and Cologne Excellence Cluster in Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Peter Frommolt
- Bioinformatics Core Facility, CECAD, and Cologne Center for Genomics, Cologne, Germany
| | - Susanne Brodesser
- Lipidomics Core Facility, CECAD, and Institute for Medical Microbiology, Immunology and Hygiene, Cologne, Germany
| | - Marek Jindra
- Biology Center, Academy of Sciences of the Czech Republic, Ceske Budejovice, Czech Republic
| | - Mirka Uhlirova
- Institute for Genetics and Cologne Excellence Cluster in Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
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Rose CL, Chakravarti N, Curry JL, Torres-Cabala CA, Bassett R, Prieto VG, Tetzlaff MT. The utility of ATF3 in distinguishing cutaneous squamous cell carcinoma among other cutaneous epithelial neoplasms. J Cutan Pathol 2012; 39:762-8. [PMID: 22764884 DOI: 10.1111/j.1600-0560.2012.01938.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Revised: 05/10/2012] [Accepted: 05/23/2012] [Indexed: 12/18/2022]
Abstract
The histopathologic distinction between benign and malignant cutaneous keratinocytic proliferations can pose a difficult diagnostic challenge - often with important clinical implications. Activating transcription factor 3 (ATF3) has emerged as a potential biomarker which may aid in the segregation of these lesions, and we hypothesize that ATF3 expression may be a specific marker of cutaneous squamous cell carcinoma (SCC). Using immunohistochemistry, we characterized ATF3 expression in a series of 126 cutaneous epithelial proliferations, including SCC (n = 27), basal cell carcinomas (BCC, n = 59), seborrheic keratoses with atypia (SK, n = 16), hyperplastic actinic keratoses (AK, n = 12) and prurigo nodularis cases (PN, n = 12). We showed strong, nuclear and/or nucleolar expression of ATF3 in a statistically significant number of cases of SCC compared to BCC, SK and PN. We conclude that ATF3 expression is a surrogate of malignancy (or pre-malignancy) in keratinocytic epithelial proliferations and thus helps distinguish SCC from other cutaneous epithelial neoplasms.
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Affiliation(s)
- Crystal L Rose
- Department of Pathology, Section of Dermatopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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Hunt D, Raivich G, Anderson PN. Activating transcription factor 3 and the nervous system. Front Mol Neurosci 2012; 5:7. [PMID: 22347845 PMCID: PMC3278981 DOI: 10.3389/fnmol.2012.00007] [Citation(s) in RCA: 112] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Accepted: 01/20/2012] [Indexed: 12/18/2022] Open
Abstract
Activating transcription factor 3 (ATF3) belongs to the ATF/cyclic AMP responsive element binding family of transcription factors and is often described as an adaptive response gene whose activity is usually regulated by stressful stimuli. Although expressed in a number of splice variants and generally recognized as a transcriptional repressor, ATF3 has the ability to interact with a number of other transcription factors including c-Jun to form complexes which not only repress, but can also activate various genes. ATF3 expression is modulated mainly at the transcriptional level and has markedly different effects in different types of cell. The levels of ATF3 mRNA and protein are normally very low in neurons and glia but their expression is rapidly upregulated in response to injury. ATF3 expression in neurons is closely linked to their survival and the regeneration of their axons following axotomy, and that in peripheral nerves correlates with the generation of a Schwann cell phenotype that is conducive to axonal regeneration. ATF3 is also induced by Toll-like receptor (TLR) ligands but acts as a negative regulator of TLR signaling, suppressing the innate immune response which is involved in immuno-surveillance and can enhance or reduce the survival of injured neurons and promote the regeneration of their axons.
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Affiliation(s)
- David Hunt
- Medical Education Centre, Newham University Hospital London, UK
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Dissociation of the glucose and lipid regulatory functions of FoxO1 by targeted knockin of acetylation-defective alleles in mice. Cell Metab 2011; 14:587-97. [PMID: 22055502 PMCID: PMC3221516 DOI: 10.1016/j.cmet.2011.09.012] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Revised: 05/09/2011] [Accepted: 09/09/2011] [Indexed: 11/20/2022]
Abstract
FoxO1 integrates multiple metabolic pathways. Nutrient levels modulate FoxO1 acetylation, but the functional consequences of this posttranslational modification are unclear. To answer this question, we generated mice bearing alleles that encode constitutively acetylated and acetylation-defective FoxO1 proteins. Homozygosity for an allele mimicking constitutive acetylation (Foxo1(KQ/KQ)) results in embryonic lethality due to cardiac and angiogenesis defects. In contrast, mice homozygous for a constitutively deacetylated Foxo1 allele (Foxo1(KR/KR)) display a unique metabolic phenotype of impaired insulin action on hepatic glucose metabolism but decreased plasma lipid levels and low respiratory quotient that are consistent with a state of preferential lipid usage. Moreover, Foxo1(KR/KR) mice show a dissociation between weight gain and insulin resistance in predisposing conditions (high fat diet, diabetes, and insulin receptor mutations), possibly due to decreased cytokine production in adipose tissue. Thus, acetylation inactivates FoxO1 during nutrient excess whereas deacetylation selectively potentiates FoxO1 activity, protecting against excessive catabolism during nutrient deprivation.
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Duprez J, Jonas JC. Role of activating transcription factor 3 in low glucose- and thapsigargin-induced apoptosis in cultured mouse islets. Biochem Biophys Res Commun 2011; 415:294-9. [DOI: 10.1016/j.bbrc.2011.10.048] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Accepted: 10/10/2011] [Indexed: 11/16/2022]
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Kim WH, Jang MK, Kim CH, Shin HK, Jung MH. ATF3 inhibits PDX-1-stimulated transactivation. Biochem Biophys Res Commun 2011; 414:681-7. [PMID: 21986529 DOI: 10.1016/j.bbrc.2011.09.132] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Accepted: 09/27/2011] [Indexed: 12/21/2022]
Abstract
Chronic endoplasmic reticulum (ER) stress leads to β-cell failure via reduction of pancreatic and duodenal homeobox-1 (PDX-1) activity, which contributes to the pathogenesis of type 2 diabetes. However, the exact mechanisms by which ER stress reduces PDX-1 activity in pancreatic β-cells are unclear. Previously, we showed that ATF3 downregulates PDX-1 gene expression in MIN6N8 pancreatic β-cells. Here, we investigated another role of ATF3 on the regulation of PDX-1 activity. ATF3 significantly inhibited PDX-1-stimulated transactivation of reporter plasmid containing promoters for PDX-1 binding element and the PDX-1 target gene glucokinase, which is dependent on C-terminal domain of ATF3. ATF3 interacted with PDX-1, and effectively inhibited p300-mediated transcriptional coactivation of the PBE-containing promoter, whereas C-terminal domain-deleted ATF3 did not inhibit the transcoactivation of p300. ATF3 decreased the interaction of p300 with PDX-1 in MIN6N8 cells coexpressing PDX-1 and ATF3. In addition, chromatin immunoprecipitation analysis demonstrated that both tunicamycin treatment and ATF3 overexpression inhibited the recruitment of p300 to PDX-1 on the insulin promoter in MIN6N8 cells. Taken together, these results suggest that ATF3 inhibits PDX-1-mediated transactivation through the inhibition of p300-stimulated coactivation, which may lead to β-cell dysfunction by ER stress.
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Affiliation(s)
- Won-Ho Kim
- Division of Metabolic Disease, Department of Biomedical Science, National Institutes of Health, #194 Tongillo, Eunpyung-gu, Seoul 122-701, South Korea
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Martens GA, Jiang L, Hellemans KH, Stangé G, Heimberg H, Nielsen FC, Sand O, Van Helden J, Van Lommel L, Schuit F, Gorus FK, Pipeleers DG. Clusters of conserved beta cell marker genes for assessment of beta cell phenotype. PLoS One 2011; 6:e24134. [PMID: 21912665 PMCID: PMC3166300 DOI: 10.1371/journal.pone.0024134] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Accepted: 08/01/2011] [Indexed: 12/02/2022] Open
Abstract
Background and Methodology The aim of this study was to establish a gene expression blueprint of pancreatic beta cells conserved from rodents to humans and to evaluate its applicability to assess shifts in the beta cell differentiated state. Genome-wide mRNA expression profiles of isolated beta cells were compared to those of a large panel of other tissue and cell types, and transcripts with beta cell-abundant and -selective expression were identified. Iteration of this analysis in mouse, rat and human tissues generated a panel of conserved beta cell biomarkers. This panel was then used to compare isolated versus laser capture microdissected beta cells, monitor adaptations of the beta cell phenotype to fasting, and retrieve possible conserved transcriptional regulators. Principal Findings A panel of 332 conserved beta cell biomarker genes was found to discriminate both isolated and laser capture microdissected beta cells from all other examined cell types. Of all conserved beta cell-markers, 15% were strongly beta cell-selective and functionally associated to hormone processing, 15% were shared with neuronal cells and associated to regulated synaptic vesicle transport and 30% with immune plus gut mucosal tissues reflecting active protein synthesis. Fasting specifically down-regulated the latter cluster, but preserved the neuronal and strongly beta cell-selective traits, indicating preserved differentiated state. Analysis of consensus binding site enrichment indicated major roles of CREB/ATF and various nutrient- or redox-regulated transcription factors in maintenance of differentiated beta cell phenotype. Conclusions Conserved beta cell marker genes contain major gene clusters defined by their beta cell selectivity or by their additional abundance in either neural cells or in immune plus gut mucosal cells. This panel can be used as a template to identify changes in the differentiated state of beta cells.
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Affiliation(s)
- Geert A Martens
- Diabetes Research Center, Vrije Universiteit Brussel, Brussels, Belgium.
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Jang MK, Park HJ, Jung MH. ATF3 represses PDX-1 expression in pancreatic β-cells. Biochem Biophys Res Commun 2011; 412:385-90. [DOI: 10.1016/j.bbrc.2011.07.108] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Accepted: 07/24/2011] [Indexed: 11/25/2022]
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Cheng CF, Lin H. Acute kidney injury and the potential for ATF3-regulated epigenetic therapy. Toxicol Mech Methods 2011; 21:362-6. [DOI: 10.3109/15376516.2011.557876] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Chen G, Liu C, Xue Y, Mao X, Xu K, Liu C. Molecular mechanism of pancreatic β-cell adaptive proliferation: studies during pregnancy in rats and in vitro. Endocrine 2011; 39:118-27. [PMID: 21069579 DOI: 10.1007/s12020-010-9421-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Accepted: 10/25/2010] [Indexed: 12/30/2022]
Abstract
There is a widespread interest in defining factors and mechanisms that stimulate proliferation of pancreatic islet β-cells. Pregnancy is a special period when the pancreatic islet displays a highly reproducible physiological proliferation. However, the molecular mechanism of β-cell proliferation during pregnancy is unclear. Here, we used cDNA expression array to explore gene expression profiles of islet at various stages of pregnancy in rats. Differentially expressed genes related to islet proliferation were screened by bioinformatics methods, and further verified by real-time PCR, RT-PCR, and Western blotting. Compared with control group, expressions of hundreds of genes were changed during pregnancy. The differentially expressed genes related to islet proliferation were mainly distributed in three groups: genes involved in transcription regulator activity, genes involved in apoptosis or tumor, and genes for Wnt signaling pathway. Among these genes, expressions of Nupr1, Atf3, Btg2, β-catenin, and c-Myc mRNA were up-regulated during pregnancy. A prominent expression of Nupr1 and Atf3 protein was observed in islets on day 10.5 of pregnancy, i.e., with earlier time phases than proliferation peak. Moreover, we found that prolactin (PRL) can increase the proliferation of β-cell in vitro, which is accompanied by up-regulation of Atf3 and Nupr1, indicating that they may play a crucial role in PRL-induced pancreatic β-cell growth. In conclusion, our results suggest that the transcription factor Nupr1, Atf3, and Wnt pathway may play an important role in adaptive proliferation of pancreatic islets during pregnancy in rats.
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Affiliation(s)
- Guofang Chen
- Department of Endocrinology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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Guo Y, Johnson EC, Cepurna WO, Dyck JA, Doser T, Morrison JC. Early gene expression changes in the retinal ganglion cell layer of a rat glaucoma model. Invest Ophthalmol Vis Sci 2011; 52:1460-73. [PMID: 21051717 DOI: 10.1167/iovs.10-5930] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
PURPOSE To identify patterns of early gene expression changes in the retinal ganglion cell layer (GCL) of a rodent model of chronic glaucoma. METHODS Prolonged elevation of intraocular pressure (IOP) was produced in rats by episcleral vein injection of hypertonic saline (N = 30). GCLs isolated by laser capture microdissection were grouped by grading of the nerve injury (<25% axon degeneration for early injury; >25% for advanced injury). Gene expression was determined by cDNA microarray of independent GCL RNA samples. Quantitative PCR (qPCR) was used to further examine the expression of selected genes. RESULTS By array analysis, 533 GCL genes (225 up, 308 down) were significantly regulated in early injury. Compared to only one major upregulated gene class of metabolism regulation, more were downregulated, including mitochondria, ribosome, proteasome, energy pathways, protein synthesis, protein folding, and synaptic transmission. qPCR confirmed an early upregulation of Atf3. With advanced injury, 1790 GCL genes were significantly regulated (997 up, 793 down). Altered gene categories included upregulated protein synthesis, immune response, and cell apoptosis and downregulated dendrite morphogenesis and axon extension. Of all the early changed genes, 50% were not present in advanced injury. These uniquely affected genes were mainly associated with upregulated transcription regulation and downregulated protein synthesis. CONCLUSIONS Early GCL gene responses to pressure-induced injury are characterized by an upregulation of Atf3 and extensive downregulation in genes associated with cellular metabolism and neuronal functions. Most likely, these changes represent those specific to RGCs and are thus potentially important for enhancing RGC survival in glaucoma.
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Affiliation(s)
- Ying Guo
- Kenneth C. Swan Ocular Neurobiology Laboratory, Casey Eye Institute, Oregon Health and Science University, Portland, Oregon 97239, USA
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The potential role of ATF3 on immune response is regulated by BMP10 through Smad dependent pathway. Med Hypotheses 2011; 76:685-8. [PMID: 21345597 DOI: 10.1016/j.mehy.2011.01.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2010] [Accepted: 01/20/2011] [Indexed: 02/05/2023]
Abstract
It is hypothesis that ATF3 is a downstream component of BMP10. The possible function of ATF3 on immune response is partially regulated by BMP10 via Smad dependent pathway. BMP10 is highly expressed in blood cells during embryonic development based on our in situ hybridization. The expression of ATF3 is enhanced by BMP10 in overexpression transgenic mice. Both BMP10 and ATF3 can response to stress stimulate, and ATF3 is well understood as a stress inducible gene which possible contributes to immune response. The Smad dependent pathway is well established for BMP10 in regulation expression of downstream targets. It would be interesting for us to determine the relationship between BMP10 and ATF3, especially to understand the mechanism of BMP10 and ATF3 effecting on heart development, as well as immune response exposed to stress stimulates.
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