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Hodonsky CJ, Turner AW, Khan MD, Barrientos NB, Methorst R, Ma L, Lopez NG, Mosquera JV, Auguste G, Farber E, Ma WF, Wong D, Onengut-Gumuscu S, Kavousi M, Peyser PA, van der Laan SW, Leeper NJ, Kovacic JC, Björkegren JLM, Miller CL. Multi-ancestry genetic analysis of gene regulation in coronary arteries prioritizes disease risk loci. CELL GENOMICS 2024; 4:100465. [PMID: 38190101 PMCID: PMC10794848 DOI: 10.1016/j.xgen.2023.100465] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 09/07/2023] [Accepted: 11/19/2023] [Indexed: 01/09/2024]
Abstract
Genome-wide association studies (GWASs) have identified hundreds of risk loci for coronary artery disease (CAD). However, non-European populations are underrepresented in GWASs, and the causal gene-regulatory mechanisms of these risk loci during atherosclerosis remain unclear. We incorporated local ancestry and haplotypes to identify quantitative trait loci for expression (eQTLs) and splicing (sQTLs) in coronary arteries from 138 ancestrally diverse Americans. Of 2,132 eQTL-associated genes (eGenes), 47% were previously unreported in coronary artery; 19% exhibited cell-type-specific expression. Colocalization revealed subgroups of eGenes unique to CAD and blood pressure GWAS. Fine-mapping highlighted additional eGenes, including TBX20 and IL5. We also identified sQTLs for 1,690 genes, among which TOR1AIP1 and ULK3 sQTLs demonstrated the importance of evaluating splicing to accurately identify disease-relevant isoform expression. Our work provides a patient-derived coronary artery eQTL resource and exemplifies the need for diverse study populations and multifaceted approaches to characterize gene regulation in disease processes.
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Affiliation(s)
- Chani J Hodonsky
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA 22908, USA
| | - Adam W Turner
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA 22908, USA
| | - Mohammad Daud Khan
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA 22908, USA
| | - Nelson B Barrientos
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA 22908, USA; Department of Genetic Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Ruben Methorst
- Central Diagnostics Laboratory, Division Laboratories, Pharmacy, and Biomedical Genetics, University Medical Center Utrecht, Utrecht University, 3584 CX Utrecht, the Netherlands
| | - Lijiang Ma
- Department of Genetics and Genomic Sciences, Icahn Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Nicolas G Lopez
- Division of Vascular Surgery, Department of Surgery, Stanford University, Stanford, CA 94305, USA
| | - Jose Verdezoto Mosquera
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA 22908, USA; Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA 22908, USA
| | - Gaëlle Auguste
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA 22908, USA
| | - Emily Farber
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA 22908, USA
| | - Wei Feng Ma
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA 22908, USA; Medical Scientist Training Program, Department of Pathology, University of Virginia, Charlottesville, VA 22908, USA
| | - Doris Wong
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA 22908, USA; Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA 22908, USA
| | - Suna Onengut-Gumuscu
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA 22908, USA
| | - Maryam Kavousi
- Department of Epidemiology, Erasmus University Medical Center, 3000 CA Rotterdam, the Netherlands
| | - Patricia A Peyser
- Department of Epidemiology, University of Michigan, Ann Arbor, MI 48019, USA
| | - Sander W van der Laan
- Central Diagnostics Laboratory, Division Laboratories, Pharmacy, and Biomedical Genetics, University Medical Center Utrecht, Utrecht University, 3584 CX Utrecht, the Netherlands
| | - Nicholas J Leeper
- Division of Vascular Surgery, Department of Surgery, Stanford University, Stanford, CA 94305, USA
| | - Jason C Kovacic
- Cardiovascular Research Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia; St. Vincent's Clinical School, University of New South Wales, Sydney, NSW 2052, Australia
| | - Johan L M Björkegren
- Department of Genetics and Genomic Sciences, Icahn Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Medicine, Huddinge, Karolinska Institutet, 141 52 Huddinge, Sweden
| | - Clint L Miller
- Center for Public Health Genomics, University of Virginia, Charlottesville, VA 22908, USA; Division of Vascular Surgery, Department of Surgery, Stanford University, Stanford, CA 94305, USA; Department of Public Health Sciences, University of Virginia, Charlottesville, VA 22908, USA.
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2
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Ding S, Wang X, Wang Y, Zhang Z, Yang X, Zhu X, Zhu B, Xiao C, Ge J, Yang X. The downstream network of STAT6 in promoting vascular smooth muscle cell phenotypic switch and neointimal formation. Cell Biol Int 2023; 47:1573-1588. [PMID: 37303238 DOI: 10.1002/cbin.12056] [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: 10/28/2022] [Revised: 04/30/2023] [Accepted: 05/28/2023] [Indexed: 06/13/2023]
Abstract
Intimal thickening caused by the excessive multiplication of vascular smooth muscle cells (VSMCs) is the pathological process central to cardiovascular diseases, including restenosis. In response to vascular injury, VSMCs would undergo phenotypic switching from a fully differentiated, low proliferative rate phenotype to a more pro-proliferative, promigratory, and incompletely-differentiated state. The lack of a full understanding of the molecular pathways coupling the vascular injury stimuli to VSMCs phenotype switching largely limits the development of medical therapies for treating intima hyperplasia-related diseases. The role of signal transducers and activators of transcription 6 (STAT6) in modulating the proliferation and differentiation of various cell types, especially macrophage, has been well investigated, but little is known about its pathophysiological role and target genes in restenosis after vascular injury. In the present work, Stat6-/- mice were observed to exhibit less severe intimal hyperplasia compared with Stat6+/+ mice after carotid injury. The expression of STAT6 was upregulated in VSMCs located in the injured vascular walls. STAT6 deletion leads to decreased proliferation and migration of VSMCs while STAT6 overexpression enhances the proliferation and migration of VSMCs companies with reduced expression of VSMCs marker genes and organized stress fibers. The effect of STAT6 in mouse VSMCs was conserved in human aortic SMCs. RNA-deep-sequencing and experiments verification revealed LncRNA C7orf69/LOC100996318-miR-370-3p/FOXO1-ER stress signaling as the downstream network mediating the pro-dedifferentiation effect of STAT6 in VSMCs. These findings broaden our understanding of vascular pathological molecules and throw a beam of light on the therapy of a variety of proliferative vascular diseases.
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Affiliation(s)
- Suling Ding
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Xiangfei Wang
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yao Wang
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, School of Medicine, Shanghai, China
| | - Zhiwei Zhang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Xiyang Yang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Xiaowei Zhu
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Baoling Zhu
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Chun Xiao
- Department of Cardiology, The Third People's Hospital of Huizhou, Guangdong, Huizhou, China
| | - Junbo Ge
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, China
- NHC Key Laboratory of Viral Heart Diseases, Fudan University, Shanghai, China
- Key Laboratory of Viral Heart Diseases, Chinese Academy of Medical Sciences, Shanghai, China
| | - Xiangdong Yang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China
- Department of Cardiology, The Third People's Hospital of Huizhou, Guangdong, Huizhou, China
- NHC Key Laboratory of Viral Heart Diseases, Fudan University, Shanghai, China
- Key Laboratory of Viral Heart Diseases, Chinese Academy of Medical Sciences, Shanghai, China
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3
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Hodonsky CJ, Turner AW, Khan MD, Barrientos NB, Methorst R, Ma L, Lopez NG, Mosquera JV, Auguste G, Farber E, Ma WF, Wong D, Onengut-Gumuscu S, Kavousi M, Peyser PA, van der Laan SW, Leeper NJ, Kovacic JC, Björkegren JLM, Miller CL. Integrative multi-ancestry genetic analysis of gene regulation in coronary arteries prioritizes disease risk loci. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.02.09.23285622. [PMID: 36824883 PMCID: PMC9949190 DOI: 10.1101/2023.02.09.23285622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Genome-wide association studies (GWAS) have identified hundreds of genetic risk loci for coronary artery disease (CAD). However, non-European populations are underrepresented in GWAS and the causal gene-regulatory mechanisms of these risk loci during atherosclerosis remain unclear. We incorporated local ancestry and haplotype information to identify quantitative trait loci (QTL) for gene expression and splicing in coronary arteries obtained from 138 ancestrally diverse Americans. Of 2,132 eQTL-associated genes (eGenes), 47% were previously unreported in coronary arteries and 19% exhibited cell-type-specific expression. Colocalization analysis with GWAS identified subgroups of eGenes unique to CAD and blood pressure. Fine-mapping highlighted additional eGenes of interest, including TBX20 and IL5 . Splicing (s)QTLs for 1,690 genes were also identified, among which TOR1AIP1 and ULK3 sQTLs demonstrated the importance of evaluating splicing events to accurately identify disease-relevant gene expression. Our work provides the first human coronary artery eQTL resource from a patient sample and exemplifies the necessity of diverse study populations and multi-omic approaches to characterize gene regulation in critical disease processes. Study Design Overview
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Martin-Broto J, Mondaza-Hernandez JL, Moura DS, Hindi N. A Comprehensive Review on Solitary Fibrous Tumor: New Insights for New Horizons. Cancers (Basel) 2021; 13:cancers13122913. [PMID: 34200924 PMCID: PMC8230482 DOI: 10.3390/cancers13122913] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/01/2021] [Accepted: 06/04/2021] [Indexed: 12/16/2022] Open
Abstract
Simple Summary Solitary fibrous tumor (SFT) is a malignant condition that exhibits different clinical behaviors ranging from low to high aggressive SFT, with dedifferentiated SFT (DD-SFT) being the fastest-growing subtype. Even when surgery alone provides curation rates above 60%, recurrences do occur in a fraction of patients where surgery is unable to provide disease control. Among the systemic therapeutic options, antiangiogenic compounds have shown higher efficacy than chemotherapy by indirect comparisons. Furthermore, rotating different antiangiogenics, at the progression time, has been shown to be effective. The exception is DD-SFT since it is resistant to antiangiogenics but can respond to chemotherapy. This comprehensive review also analyzes the underlying molecular components that play a key role in SFT origin and aggressiveness. The discovery in 2013 of anomalous fusion genes between NAB2 and STAT6 was determinant to increase the knowledge on the molecular drivers in SFT that could be potential targets for future therapies. Abstract Solitary fibrous tumor (SFT) is a rare mesenchymal, ubiquitous tumor, with an incidence of 1 new case/million people/year. In the 2020 WHO classification, risk stratification models were recommended as a better tool to determine prognosis in SFT, to the detriment of “typical” or “malignant” classic terms. The risk for metastasis is up to 35–45%, or even greater, in series with a longer follow-up. Over the last few decades, advances in immunohistochemistry and molecular diagnostics identified STAT6 nuclear protein expression and the NAB2–STAT6 fusion gene as more precise tools for SFT diagnosis. Recent evidence taken from retrospective series and from two prospective phase II clinical trials showed that antiangiogenics are active and their sequential use from first line should be considered, except for dedifferentiated SFT for which chemotherapy is the best option. Since the fusion transcript driver’s first description in 2013, new insights have been brought on key molecular events in SFT. This comprehensive review mainly focuses on the superior efficacy of antiangiogenics over chemotherapeutic agents in SFT, provides the current knowledge of key molecules that could co-drive the SFT behavior, and suggests new target candidates that deserve to be explored in preclinical and clinical research in SFT.
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Affiliation(s)
- Javier Martin-Broto
- Fundacion Jimenez Díaz University Hospital, 28040 Madrid, Spain;
- General de Villalba University Hospital, Collado Villalba, 28400 Madrid, Spain
- Fundación Jiménez Díaz Institute for Medical Research (IIS/FJD), 28040 Madrid, Spain
- Correspondence:
| | - Jose L. Mondaza-Hernandez
- Institute of Biomedicine of Seville (IBiS, CSIC, US and HUVR), 41013 Sevilla, Spain; (J.L.M.-H.); (D.S.M.)
| | - David S. Moura
- Institute of Biomedicine of Seville (IBiS, CSIC, US and HUVR), 41013 Sevilla, Spain; (J.L.M.-H.); (D.S.M.)
| | - Nadia Hindi
- Fundacion Jimenez Díaz University Hospital, 28040 Madrid, Spain;
- General de Villalba University Hospital, Collado Villalba, 28400 Madrid, Spain
- Fundación Jiménez Díaz Institute for Medical Research (IIS/FJD), 28040 Madrid, Spain
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Tang HX, Qin XP, Li J. Role of the signal transducer and activator of transcription 3 protein in the proliferation of vascular smooth muscle cells. Vascular 2020; 28:821-828. [PMID: 32486969 DOI: 10.1177/1708538120929504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Cardiovascular disease (CVD) remains the primary cause of morbidity and mortality worldwide. The abnormal proliferation of vascular smooth muscle cells (VSMCs) is a key event in the pathogenesis of CVD. The functional and phenotypic changes in vascular cells are mediated by complex signaling cascades that initiate and control genetic reprogramming. Many studies have demonstrated that signal transducer and activator of transcription 3 (STAT3) regulates a diverse array of functions relevant to atherosclerosis. METHODS In this review, we summarize the studies on the STAT3-mediated proliferation of VSMCs and subsequent CVDs such as hypertension, atherosclerosis, stroke, coronary artery disease, and myocardial infarction. Furthermore, we describe the general background of STAT3, its structure, function and regulation as well as the STAT3 signaling pathway. Finally, we highlight some potential issues and propose some solutions to these issues.Results and conclusions: STAT3 activation promotes the proliferation of VSMCs by regulating the transcription of genes. Studying the mechanism of VSMC proliferation induced by the STAT3 pathway is valuable for finding therapeutic targets for CVD.
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Affiliation(s)
- Hong-Xia Tang
- The First People's Hospital of Chenzhou, Institute of Pharmacy and Pharmacology, University of South China, Hunan, China
| | - Xu-Ping Qin
- The First People's Hospital of Chenzhou, Institute of Pharmacy and Pharmacology, University of South China, Hunan, China
| | - Jie Li
- The First People's Hospital of Chenzhou, Institute of Pharmacy and Pharmacology, University of South China, Hunan, China
- School of Pharmacy, Southern Medical University, Guangdong, China
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Hosseini A, Gharibi T, Marofi F, Javadian M, Babaloo Z, Baradaran B. Janus kinase inhibitors: A therapeutic strategy for cancer and autoimmune diseases. J Cell Physiol 2020; 235:5903-5924. [DOI: 10.1002/jcp.29593] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 01/08/2020] [Indexed: 02/06/2023]
Affiliation(s)
- Arezoo Hosseini
- Immunology Research CenterTabriz University of Medical SciencesTabriz Iran
- Department of Immunology, School of MedicineTabriz University of Medical SciencesTabriz Iran
- Student Research CommitteeTabriz University of Medical SciencesTabriz Iran
- Aging Research InstituteTabriz University of Medical SciencesTabriz Iran
| | - Tohid Gharibi
- Immunology Research CenterTabriz University of Medical SciencesTabriz Iran
- Department of Immunology, School of MedicineTabriz University of Medical SciencesTabriz Iran
- Student Research CommitteeTabriz University of Medical SciencesTabriz Iran
- Aging Research InstituteTabriz University of Medical SciencesTabriz Iran
| | - Faroogh Marofi
- Department of Immunology, School of MedicineTabriz University of Medical SciencesTabriz Iran
| | - Mahsa Javadian
- Department of Immunology, School of MedicineTabriz University of Medical SciencesTabriz Iran
| | - Zohreh Babaloo
- Immunology Research CenterTabriz University of Medical SciencesTabriz Iran
- Department of Immunology, School of MedicineTabriz University of Medical SciencesTabriz Iran
| | - Behzad Baradaran
- Immunology Research CenterTabriz University of Medical SciencesTabriz Iran
- Department of Immunology, School of MedicineTabriz University of Medical SciencesTabriz Iran
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Han NR, Kim HM, Jeong HJ. The potential anti-proliferative effect of β-sitosterol on human mast cell line-1 cells. Can J Physiol Pharmacol 2015; 93:979-83. [DOI: 10.1139/cjpp-2015-0166] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Thymic stromal lymphopoietin (TSLP) was reported to induce mast cell proliferation and aggravate allergic reactions through activation of mouse double minute 2 (MDM2). We aimed to ascertain that β-sitosterol (SI), which is one of the several phytosterols found mostly in foods, would regulate TSLP-induced mast cell proliferation. The results showed that SI significantly decreased the proliferation of human mast cell line (HMC-1) cells promoted by TSLP. SI significantly decreased the mRNA expression of Ki-67 in the TSLP-treated HMC-1 cells. SI significantly suppressed the production and mRNA expression of interleukin-13 in the TSLP-treated HMC-1 cells. Furthermore, SI downregulated the expression of MDM2 and phosphorylation of STAT6, whereas it upregulated the expression of p53, activation of caspase-3, and cleavage of poly ADP-ribose polymerase in the TSLP-treated HMC-1 cells. Results of this study suggest that SI may be a potential therapeutic agent for mast cell-mediated allergic diseases.
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Affiliation(s)
- Na-Ra Han
- Department of Pharmacology, College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - Hyung-Min Kim
- Department of Pharmacology, College of Korean Medicine, Kyung Hee University, 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - Hyun-Ja Jeong
- Department of Food Technology and Inflammatory Disease Research Center, Hoseo University, 20, Hoseo-ro 79beon-gil, Baebang-eup, Asan 336-795, Republic of Korea
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Yue H, Tanaka K, Furukawa T, Karnik SS, Li W. Thymidine phosphorylase inhibits vascular smooth muscle cell proliferation via upregulation of STAT3. BIOCHIMICA ET BIOPHYSICA ACTA 2012; 1823:1316-23. [PMID: 22668509 PMCID: PMC4133185 DOI: 10.1016/j.bbamcr.2012.05.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Revised: 04/20/2012] [Accepted: 05/25/2012] [Indexed: 11/22/2022]
Abstract
Dysregulated growth and motility of vascular smooth muscle cells (VSMC) play important role in obstructive vascular diseases. We previously reported that gene transfer of thymidine phosphorylase (TP) into rat VSMC inhibits cell proliferation and attenuates balloon injury induced neointimal hyperplasia; however, the mechanism remains unclear. The current study identified a signaling pathway that mediates effect of TP inhibited VSMC proliferation with a TP activity-dependent manner. Rat VSMC overexpressing human TP gene (C2) or control empty vector (PC) were used. Serum stimulation induced constitutive STAT3 phosphorylation at tyrosine705 in C2 cell but not in PC, which was independent of JAK2 signaling pathway. Inhibition of Src family kinases activity inhibited STAT3 phosphorylation in C2 cells. Lyn activity was higher in C2 cell than in PC. SiRNA based gene knockdown of Lyn significantly decreased serum induced STAT3 phosphorylation in C2 and dramatically increased proliferation of this cell, suggesting that Lyn plays a pivotal role in TP inhibited VSMC proliferation. Unphosphorylated STAT3 (U-STAT3) expression was significantly increased in C2 cells, which may be due to the increased STAT3 transcription. Gene transfection of mouse wild-type or Y705F mutant STAT3 into PC cell or mouse primary cultured VSMC significantly reduced proliferation of these cells, suggesting that overexpression of U-STAT3 inhibits VSMC proliferation. We conclude that Lyn mediates TP induced STAT3 activation, which subsequently contributes to upregulate expression of U-STAT3. The U-STAT3 plays a critical role in inhibiting VSMC proliferation.
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Affiliation(s)
- Hong Yue
- Department of Molecular Cardiology, Lerner Research Institute, The Cleveland Clinic, Ohio USA
| | - Kuniyoshi Tanaka
- Second Department of Surgery, Faculty of Medical Sciences, University of Fukui, Fukui Japan
| | - Tatsuhiko Furukawa
- Department of Molecular Oncology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima Japan
| | - Sadashiva S. Karnik
- Department of Molecular Cardiology, Lerner Research Institute, The Cleveland Clinic, Ohio USA
- Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Ohio, USA
| | - Wei Li
- Second Department of Surgery, Faculty of Medical Sciences, University of Fukui, Fukui Japan
- Department of Cell Biology, Lerner Research Institute, The Cleveland Clinic, Ohio USA
- Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Ohio, USA
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Donetti E, Decorato I, Bertarelli E, Baetta R, Corsini A, Sforza C, Dubini G. Fluid–Structure Computational Analysis to Investigate the Link between Early Atherogenic Events and the Hemodynamic Environment in an Experimental Model of Intimal Thickening. Cardiovasc Eng Technol 2012. [DOI: 10.1007/s13239-012-0100-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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10
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Merk BC, Owens JL, Lopes MBS, Silva CM, Hussaini IM. STAT6 expression in glioblastoma promotes invasive growth. BMC Cancer 2011; 11:184. [PMID: 21595984 PMCID: PMC3118945 DOI: 10.1186/1471-2407-11-184] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Accepted: 05/20/2011] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Glioblastoma (GBM) is a highly aggressive malignant primary brain tumor, characterized by rapid growth, diffuse infiltration of cells into both adjacent and remote brain regions, and a generalized resistance to currently available treatment modalities. Recent reports in the literature suggest that Signal Transducers and Activators of Transcription (STATs) play important roles in the regulation of GBM pathophysiology. METHODS STAT6 protein expression was analyzed by Western blotting in GBM cell lines and by immunohistochemistry in a tissue microarray (TMA) of glioma patient tissues. We utilized shRNA against STAT6 to investigate the effects of prolonged STAT6 depletion on the growth and invasion of two STAT6-positive GBM cell lines. Cell proliferation was assessed by measuring (3)H-Thymidine uptake over time. Invasion was measured using an in vitro transwell assay in which cells invade through a type IV collagen matrix toward a chemoattractant (Fetal Bovine Serum). Cells were then stained and counted. Kaplan-Meyer survival curves were generated to show the correlation between STAT6 gene expression and patient survival in 343 glioma patients and in a subset of patients with only GBM. Gene expression microarray and clinical data were acquired from the Rembrandt 1 public data depository (https://caintegrator.nci.nih.gov/rembrandt/). Lastly, a genome-wide expression microarray analysis was performed to compare gene expression in wild-type GBM cells to expression in stable STAT6 knockdown clones. RESULTS STAT6 was expressed in 2 GBM cell lines, U-1242MG and U-87MG, and in normal astrocytes (NHA) but not in the U-251MG GBM cell line. In our TMA study, STAT6 immunostaining was visible in the majority of astrocytomas of all grades (I-IV) but not in normal brain tissue. In positive cells, STAT6 was localized exclusively in the nuclei over 95% of the time. STAT6-deficient GBM cells showed a reduction in (3)H-Thymidine uptake compared to the wild-type. There was some variation among the different shRNA- silenced clones, but all had a reduction in (3)H-Thymidine uptake ranging from 35%- 70% in U-1242MG and 40- 50% in U-87MG cells. Additionally, STAT6- depleted cells were less invasive than controls in our in vitro transmembrane invasion assay. Invasiveness was decreased by 25-40% and 30-75% in U-1242MG and U-87MG cells, respectively. The microarray analysis identified matrix metalloproteinase 1 (MMP-1) and urokinase Plasminogen activator (uPA) as potential STA6 target genes involved in the promotion of GBM cell invasion. In a Kaplan-Meier survival curve based on Rembrandt 1 gene expression microarray and clinical data, there was a significant difference in survival (P < 0.05) between glioma patients with up- and down-regulated STAT6. Decreased STAT6 expression correlated with longer survival times. In two subsets of patients with either grade IV tumors (GBM) or Grade II/III astrocytomas, there was a similar trend that however did not reach statistical significance. CONCLUSIONS Taken together, these findings suggest a role for STAT6 in enhancing cell proliferation and invasion in GBM, which may explain why up-regulation of STAT6 correlates with shorter survival times in glioma patients. This report thus identifies STAT6 as a new and potentially promising therapeutic target.
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Affiliation(s)
- Barbara C Merk
- Department of Pathology, University of Virginia, Charlottesville, VA 22908, USA.
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Guo F, Zarella C, Wagner WD. STAT4 and the proliferation of artery smooth muscle cells in atherosclerosis. Exp Mol Pathol 2006; 81:15-22. [PMID: 16797528 DOI: 10.1016/j.yexmp.2006.04.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2006] [Accepted: 04/26/2006] [Indexed: 10/24/2022]
Abstract
Artery smooth muscle cell proliferation is of key importance in the development of atherosclerosis and restenosis following PTCA. In order to understand gene regulation involved in these processes, vascular smooth muscle cells (VSMCs) from atherosclerosis-susceptible White Carneau (WC) and atherosclerosis-resistant Show Racer (SR) pigeons were used to identify transcription factors involved in the enhanced proliferation of WC VSMCs. With protein/DNA array, signal transducer and activator of transcription 4 (STAT4) was found to have over a 10-fold increase in expression in WC compared to SR VSMCs. The difference was confirmed with electrophoretic-mobility shift assay (EMSA) and Western blot. Cells cultured under low serum had 5-fold higher levels of STAT4 in WC compared to SR. By Western analysis, aortic tissue from newly hatched WC pigeons had 1.7-2.0 times greater STAT4 expression than in SR pigeons. A pathway whereby enhanced STAT4 may be associated with enhanced proliferation was identified following IL-12 stimulation of WC VSMCs where 3-fold increases in proliferation and 2-fold higher expression of STAT4 were measured. The findings suggest STAT4 may play a role in VSMC proliferation and describe a unique pigeon model system in which to study STAT4 as a gene target for atherosclerosis therapy.
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Affiliation(s)
- Feng Guo
- Department of Pathology, Wake Forest University, School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157, USA
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12
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Bruns HA, Kaplan MH. The role of constitutively active Stat6 in leukemia and lymphoma. Crit Rev Oncol Hematol 2006; 57:245-53. [PMID: 16213149 DOI: 10.1016/j.critrevonc.2005.08.005] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2005] [Revised: 07/28/2005] [Accepted: 08/09/2005] [Indexed: 10/25/2022] Open
Abstract
Signal transducers and activators of transcription (STAT) are a family of transcription factors that regulate a broad range of cellular processes, such as proliferation, differentiation, and survival, in a large variety of cell types. Because of their regulation of diverse cellular functions, their aberrant activation is frequently associated with disease development, particularly oncogenic diseases. Much evidence exists to suggest that STAT proteins play a significant role in cellular transformation. However, which STAT proteins and to what extent they cause transformation and subsequent disease progression are topics currently being investigated. In this review, we will report on the findings concerning the involvement of Stat6 in the development of lymphoma and leukemia. Mounting evidence, in both patients and mouse models, supports a model where Stat6 is not a mere bystander, but rather, plays an active role in promoting a transformed phenotype.
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Affiliation(s)
- Heather A Bruns
- Department of Biology, Ball State University, 2000 West University Avenue CL 121, Muncie, IN 47306, USA.
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Satterthwaite G, Francis SE, Suvarna K, Blakemore S, Ward C, Wallace D, Braddock M, Crossman D. Differential gene expression in coronary arteries from patients presenting with ischemic heart disease: further evidence for the inflammatory basis of atherosclerosis. Am Heart J 2005; 150:488-99. [PMID: 16169330 DOI: 10.1016/j.ahj.2004.10.025] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2004] [Accepted: 10/09/2004] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND OBJECTIVE The pathogenesis of human coronary artery disease (CAD) is likely to require the transcription of many different genes. We report here the differential gene expression profiling of human CAD using copy DNA (cDNA)/nylon array hybridization techniques. METHODS AND RESULTS Human coronary arteries were obtained at the time of cardiac transplantation. Ten patients were transplanted for ischemic heart disease (IHD) and 5 for dilated cardiomyopathy (DCM). We generated a customized cDNA array containing 9206 clones and after hybridization of patient samples, data reduction, and refinement, identified 515 sequence-verified, differentially expressed clones. These clones represented 361 genes that were differentially expressed at significant levels between IHD and DCM arteries (t test, P < .05). Of these clones, 70% were defined genes of known function and 30% were genes of unknown function. Of the differentially expressed genes, 53.6% were up-regulated and 46.4% were down-regulated. Hierarchical clustering was performed and several distinct functional clusters were identified, including a cluster of genes related to inflammatory mechanisms. Validation by real-time polymerase chain reaction was undertaken with 2 genes known to be up-regulated in atherosclerosis (interleukin 1beta [IL-1beta] and IL-8) and 2 novel genes identified by the array analysis (signal transducer and activator of transcription 6 [STAT6] and IL-1 receptor-associated kinase [IRAK]). Differential expression of IL-1beta, IL-8, and STAT6 were confirmed by this method. Immunohistochemistry of STAT6 demonstrated increased expression in vascular smooth muscle cells of IHD coronary arteries. CONCLUSION These data support the inflammatory basis of human atherosclerotic CAD and identify novel genes in atherosclerosis.
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Affiliation(s)
- Gemma Satterthwaite
- Division of Clinical Sciences (North), University of Sheffield, Sheffield, UK
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Schnyder B, Schnyder-Candrian S, Panski A, Bömmel H, Heim M, Duschl A, Moser R. Phytochemical inhibition of interleukin-4-activated Stat6 and expression of VCAM-1. Biochem Biophys Res Commun 2002; 292:841-7. [PMID: 11944890 DOI: 10.1006/bbrc.2002.6754] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Cellular functions induced by cytokine interleukin (IL)-4 and IL-4 signaling through signal transducer and activator of transcription (Stat)6 typify a Th2-type immune response. We investigated the inhibitor effect of the NFkappaB blocker parthenolide in the late-phase, Th2-type immune response. Parthenolide blocked by 90.6 +/- 7.4% the IL-4-induced expression of the endothelial vascular cell adhesion molecule (VCAM)-1, a hallmark of extravasation of very late antigen-4-positive leukocytes. The noncytotoxic concentrations of 10 microM parthenolide left a section of the IL-4 receptor signal transduction intact. Parthenolide did not interfere with the immediate IL-4-induced phosphorylation of endothelial Stat6 on its tyrosine residue Y641 and with tyrosine phosphorylation of the adapter molecule, Jak2-both processes are obligatory for dimerization and nuclear translocation of Stat6. But parthenolide inhibited the Stat6 DNA-binding activity in IL-4-stimulated endothelial cells and inhibited the IL-4-driven activation of a luciferase reporter gene under the control of Stat6-responsive elements (IC(50) 5.11 +/- 0.67 microM). Together, these data suggest an anti-chronic disease profile for the sesquiterpene lactone parthenolide.
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Affiliation(s)
- Bruno Schnyder
- Biomedical Research Foundation, Institute for Biopharmaceutical Research Inc., Matzingen, Switzerland.
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15
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Guh JY, Huang JS, Chen HC, Hung WC, Lai YH, Chuang LY. Advanced glycation end product-induced proliferation in NRK-49F cells is dependent on the JAK2/STAT5 pathway and cyclin D1. Am J Kidney Dis 2001; 38:1096-104. [PMID: 11684565 DOI: 10.1053/ajkd.2001.28616] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Advanced glycation end products (AGEs) are important in the pathogenesis of diabetic nephropathy, which leads to renal fibrosis. Previously, we found that the janus kinase (JAK)/signal transducers and activators of transcription (STAT) signaling pathway is necessary for AGE-induced cellular proliferation in normal rat kidney interstitial fibroblast (NRK-49F) cells. However, a direct link between JAK/STAT and cell-cycle progression has not been well established. In this regard, STAT5 has been found to induce cyclin D1 and proliferation in hematopoietic cells. Therefore, we examined effects of AGE on STAT5 and cell-cycle-dependent mitogenesis in NRK-49F cells. We found that AGE increased cyclin D1 expression and cyclin-dependent kinase (cdk)4 activity while decreasing p21(WAF1/CIP1) expression. We also found that AGE (100 microg/mL) induced STAT5 tyrosine phosphorylation. Meanwhile, AGE induced STAT5 protein-DNA binding activity, which was reversed by AG-490 (a specific JAK2 inhibitor) and STAT5 decoy oligodeoxynucleotide (ODN). In addition, STAT5 decoy ODN reversed AGE-induced cell-cycle-dependent cellular proliferation and cyclin D1 protein expression. We concluded that AGE induced cell-cycle-dependent cellular proliferation by inducing the JAK2-STAT5-cyclin D1 and cdk4 pathways in NRK-49F cells.
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Affiliation(s)
- J Y Guh
- Department of Internal Medicine and School of Technology for Medical Science, Kaohsiung Medical University, Kaohsiung, Taiwan, Republic of China
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16
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Ensminger SM, Spriewald BM, Sorensen HV, Witzke O, Flashman EG, Bushell A, Morris PJ, Rose ML, Rahemtulla A, Wood KJ. Critical role for IL-4 in the development of transplant arteriosclerosis in the absence of CD40-CD154 costimulation. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2001; 167:532-41. [PMID: 11418692 DOI: 10.4049/jimmunol.167.1.532] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Blockade of the CD40-CD154 pathway can inhibit CD4(+) T cell activation but is unable to prevent immune responses mediated by CD8(+) T cells. However, even in the absence of CD8(+) T cells, inhibition of the CD40-CD154 pathway is insufficient to prevent the development of transplant arteriosclerosis. This study investigated the mechanisms of transplant arteriosclerosis in the absence of the CD40 pathway. C57BL/6 CD40(-/-) (H2(b)) recipients were transplanted with MHC-mismatched BALB/c (H2(d)) aortas. Transplant arteriosclerosis was evident in both CD40(-/-) and CD40(+/-) mice (intimal proliferation was 59 +/- 5% for CD40(-/-) mice vs 58 +/- 4% for CD40(+/-) mice) in the presence or absence of CD8(+) T cells (intimal proliferation was 46 +/- 7% for CD40(-/-) anti-CD8-treated mice vs 50 +/- 10% for CD40(+/-) anti-CD8-treated mice), confirming that CD8(+) T cells are not essential effector cells for the development of this disease. In CD40(-/-) recipients depleted of CD8(+) T cells, the number of eosinophils infiltrating the graft was markedly increased (109 +/- 24 eosinophils/grid for CD40(-/-) anti-CD8-treated mice vs 28 +/- 7 for CD40(+/-) anti-CD8-treated mice). The increased presence of eosinophils correlated with augmented intragraft production of IL-4. To test the hypothesis that IL-4 was responsible for the intimal proliferation, CD8 T cell-depleted CD40(-/-) recipients were treated with anti-IL-4 mAb. This resulted in significantly reduced eosinophil infiltration into the graft (12 +/- 5 eosinophils/grid for CD40(-/-) anti-CD8(+), anti-IL-4-treated mice vs 109 +/- 24 for CD40(-/-) anti-CD8-treated mice), intragraft eotaxin, CCR3 mRNA production, and the level of intimal proliferation (18 +/- 5% for CD40(-/-) anti-CD8(+)-, anti-IL-4-treated mice vs 46 +/- 7% for CD40(-/-) anti-CD8-treated mice). In conclusion, elevated intragraft IL-4 production results in an eosinophil infiltrate and is an important mechanism for CD8(+) T cell-independent transplant arteriosclerosis in the absence of CD40-CD154 costimulation.
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MESH Headings
- Animals
- Antibodies, Monoclonal/administration & dosage
- Antigen-Presenting Cells/immunology
- Antigen-Presenting Cells/metabolism
- Aorta, Thoracic/transplantation
- Arteriosclerosis/genetics
- Arteriosclerosis/immunology
- Arteriosclerosis/pathology
- Arteriosclerosis/prevention & control
- CD4-Positive T-Lymphocytes/pathology
- CD40 Antigens/biosynthesis
- CD40 Antigens/genetics
- CD40 Antigens/physiology
- CD40 Ligand/genetics
- CD40 Ligand/physiology
- CD8-Positive T-Lymphocytes/pathology
- Cell Movement/genetics
- Cell Movement/immunology
- Chemokine CCL11
- Chemokines, CC
- Cytokines/biosynthesis
- Cytokines/genetics
- Eosinophils/pathology
- H-2 Antigens/immunology
- Histocompatibility Antigen H-2D
- Interferon-gamma/antagonists & inhibitors
- Interferon-gamma/genetics
- Interleukin-4/antagonists & inhibitors
- Interleukin-4/genetics
- Interleukin-4/immunology
- Interleukin-4/physiology
- Isoantibodies/biosynthesis
- Lymphocyte Depletion
- Macrophage-1 Antigen/biosynthesis
- Macrophages/immunology
- Macrophages/pathology
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Knockout
- RNA, Messenger/antagonists & inhibitors
- RNA, Messenger/biosynthesis
- Receptors, CCR3
- Receptors, Chemokine/biosynthesis
- Receptors, Chemokine/genetics
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Affiliation(s)
- S M Ensminger
- Nuffield Departments of. Surgery and Medicine, University of Oxford, John Radcliffe Hospital, Oxford, United Kingdom
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Goldman M, Le Moine A, Braun M, Flamand V, Abramowicz D. A role for eosinophils in transplant rejection. Trends Immunol 2001; 22:247-51. [PMID: 11323281 DOI: 10.1016/s1471-4906(01)01893-2] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Eosinophils release inflammatory mediators and cationic proteins that are instrumental in the pathogenesis of allergic diseases such as bronchial asthma. Here, we review experimental observations indicating that eosinophils are also involved in the rejection of allografts. We propose that their role as effectors of transplant damage becomes crucial when classical pathways of rejection are inhibited and T helper 2 (Th2) cells dominate the alloimmune response.
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Affiliation(s)
- M Goldman
- Laboratory of Experimental Immunology, Faculty of Medicine, Université Libre de Bruxelles, 808 route de Lennik, B-1070 Brussels, Belgium.
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