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Huang CL, Jong YS, Wu YW, Wang WJ, Hsieh AR, Chao CL, Chen WJ, Yang WS. Association of Plasma Thrombospondin-1 Level with Cardiovascular Disease and Mortality in Hemodialysis Patients. ACTA CARDIOLOGICA SINICA 2015; 31:113-9. [PMID: 27122857 PMCID: PMC4804876 DOI: 10.6515/acs20140630d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 06/30/2014] [Indexed: 01/07/2023]
Abstract
BACKGROUND Thrombospondin-1 (TSP-1) is known to be involved in the regulation of angiogenesis, inflammation, and vascular function. Clinical studies have demonstrated its correlation with peripheral artery disease, coronary artery disease, and pulmonary hypertension. In this study, we explored its potential roles in the background of end-stage renal disease (ESRD). METHODS A total of 140 ESRD outpatients (ages 61.0 ± 12.4 years) were prospectively followed for 34 ± 7 months. Their TSP-1 levels were analyzed from pre-hemodialysis blood sample. Cardiovascular survey included ankle- brachial index (ABI), echocardiography and Tl-201 dipyridamole single-photon emission computed tomography (SPECT). RESULTS Plasma TSP-1 levels were higher in those patients with preexisting clinical evidence of cardiovascular disease (CVD) than those without (p = 0.002). TSP-1 concentrations were also correlated with ABI, left ventricular ejection fraction, and scar burden in SPECT. Stepwise logistic regression analysis revealed that TSP-1 level was independently associated with the presence of CVD, with an odds ratio of 1.38 [95% confidence interval (CI), 1.09-1.75, p = 0.008]. In survival analyses, 31 patients (22%) died during the follow-up, 16 (52%) arising from cardiovascular causes. Cox hazards analysis revealed that the patients with TSP-1 levels in the highest tertile had a 5.32- and 6.75-fold higher risk for all-cause and cardiovascular mortality than those in the lowest tertile. This predictive value for all-cause mortality still persisted after multivariate adjustment (hazard ratio, 8.71; 95% CI, 1.36-55.68; p = 0.02). CONCLUSIONS This study hallmarks the association of elevated TSP-1 level with CVD and adverse outcome among hemodialysis patients. KEY WORDS Thrombospondin-1; End-stage renal disease; Cardiovascular disease; Mortality.
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Affiliation(s)
- Chi-Lun Huang
- Department of Internal Medicine, Taoyuan General Hospital, Taoyuan
- Department of Internal Medicine, National Taiwan University Hospital
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University
| | - Yuh-Shiun Jong
- Department of Internal Medicine, Taoyuan General Hospital, Taoyuan
| | - Yen-Wen Wu
- Department of Internal Medicine, National Taiwan University Hospital
- Department of Nuclear Medicine, National Taiwan University Hospital, Taipei
- Department of Nuclear Medicine and Cardiovascular Medical Center (Cardiology), Far Eastern Memorial Hospital, New Taipei City
- National Yang-Ming University School of Medicine, Taipei
| | - Wei-Jie Wang
- Department of Internal Medicine, Taoyuan General Hospital, Taoyuan
| | - Ai-Ru Hsieh
- Graduate Institute of Biostatistics, China Medical University, Taichung
| | - Chia-Lun Chao
- Department of Internal Medicine, National Taiwan University Hospital
- Department of Internal Medicine, National Taiwan University Hospital Hsin-Chu Branch, Hsinchu
| | - Wen-Jone Chen
- Department of Internal Medicine, National Taiwan University Hospital
- Department of Emergency Medicine, Lotung Poh-Ai Hospital, Yilan County, Taiwan
| | - Wei-Shiung Yang
- Department of Internal Medicine, National Taiwan University Hospital
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University
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Soto-Pantoja DR, Kaur S, Roberts DD. CD47 signaling pathways controlling cellular differentiation and responses to stress. Crit Rev Biochem Mol Biol 2015; 50:212-30. [PMID: 25708195 DOI: 10.3109/10409238.2015.1014024] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CD47 is a widely expressed integral membrane protein that serves as the counter-receptor for the inhibitory phagocyte receptor signal-regulatory protein-α (SIRPα) and as a signaling receptor for the secreted matricellular protein thrombospondin-1. Recent studies employing mice and somatic cells lacking CD47 have revealed important pathophysiological functions of CD47 in cardiovascular homeostasis, immune regulation, resistance of cells and tissues to stress and chronic diseases of aging including cancer. With the emergence of experimental therapeutics targeting CD47, a more thorough understanding of CD47 signal transduction is essential. CD47 lacks a substantial cytoplasmic signaling domain, but several cytoplasmic binding partners have been identified, and lateral interactions of CD47 with other membrane receptors play important roles in mediating signaling resulting from the binding of thrombospondin-1. This review addresses recent advances in identifying the lateral binding partners, signal transduction pathways and downstream transcription networks regulated through CD47 in specific cell lineages. Major pathways regulated by CD47 signaling include calcium homeostasis, cyclic nucleotide signaling, nitric oxide and hydrogen sulfide biosynthesis and signaling and stem cell transcription factors. These pathways and other undefined proximal mediators of CD47 signaling regulate cell death and protective autophagy responses, mitochondrial biogenesis, cell adhesion and motility and stem cell self-renewal. Although thrombospondin-1 is the best characterized agonist of CD47, the potential roles of other members of the thrombospondin family, SIRPα and SIRPγ binding and homotypic CD47 interactions as agonists or antagonists of signaling through CD47 should also be considered.
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Affiliation(s)
- David R Soto-Pantoja
- a Laboratory of Pathology , Center for Cancer Research, National Cancer Institute, National Institutes of Health , Bethesda , MD , USA
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Sayols-Baixeras S, Lluís-Ganella C, Subirana I, Salas LA, Vilahur N, Corella D, Muñoz D, Segura A, Jimenez-Conde J, Moran S, Soriano-Tárraga C, Roquer J, Lopez-Farré A, Marrugat J, Fitó M, Elosua R. Identification of a new locus and validation of previously reported loci showing differential methylation associated with smoking. The REGICOR study. Epigenetics 2015; 10:1156-65. [PMID: 26829059 PMCID: PMC4844221 DOI: 10.1080/15592294.2015.1115175] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 10/06/2015] [Accepted: 10/27/2015] [Indexed: 12/31/2022] Open
Abstract
Smoking increases the risk of many diseases and could act through changes in DNA methylation patterns. The aims of this study were to determine the association between smoking and DNA methylation throughout the genome at cytosine-phosphate-guanine (CpG) site level and genomic regions. A discovery cross-sectional epigenome-wide association study nested in the follow-up of the REGICOR cohort was designed and included 645 individuals. Blood DNA methylation was assessed using the Illumina HumanMethylation450 BeadChip. Smoking status was self-reported using a standardized questionnaire. We identified 66 differentially methylated CpG sites associated with smoking, located in 38 genes. In most of these CpG sites, we observed a trend among those quitting smoking to recover methylation levels typical of never smokers. A CpG site located in a novel smoking-associated gene (cg06394460 in LNX2) was hypomethylated in current smokers. Moreover, we validated two previously reported CpG sites (cg05886626 in THBS1, and cg24838345 in MTSS1) for their potential relation to atherosclerosis and cancer diseases, using several different approaches: CpG site methylation, gene expression, and plasma protein level determinations. Smoking was also associated with higher THBS1 gene expression but with lower levels of thrombospondin-1 in plasma. Finally, we identified differential methylation regions in 13 genes and in four non-coding RNAs. In summary, this study replicated previous findings and identified and validated a new CpG site located in LNX2 associated with smoking.
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Affiliation(s)
- Sergi Sayols-Baixeras
- Cardiovascular Epidemiology and Genetics Research Group; IMIM (Hospital del Mar Medical Research Institute); 08003 Barcelona, Catalonia, Spain
- Universitat Pompeu Fabra (UPF); 08003 Barcelona, Catalonia, Spain
| | - Carla Lluís-Ganella
- Cardiovascular Epidemiology and Genetics Research Group; IMIM (Hospital del Mar Medical Research Institute); 08003 Barcelona, Catalonia, Spain
| | - Isaac Subirana
- Cardiovascular Epidemiology and Genetics Research Group; IMIM (Hospital del Mar Medical Research Institute); 08003 Barcelona, Catalonia, Spain
- CIBER Epidemiology and Public Health; 08003 Barcelona, Catalonia, Spain
| | - Lucas A Salas
- Universitat Pompeu Fabra (UPF); 08003 Barcelona, Catalonia, Spain
- CIBER Epidemiology and Public Health; 08003 Barcelona, Catalonia, Spain
- Centre for Research in Environmental Epidemiology (CREAL); 08003 Barcelona, Catalonia, Spain
| | - Nadia Vilahur
- Centre for Research in Environmental Epidemiology (CREAL); 08003 Barcelona, Catalonia, Spain
| | - Dolores Corella
- Preventive Medicine Department; Genetic and Molecular Epidemiology Unit; University of Valencia; 46010 Valencia, Spain
- CIBER Obesity and Nutrition; 15706 Santiago de Compostela, Galicia, Spain
| | - Dani Muñoz
- Cardiovascular Risk and Nutrition Research Group; IMIM (Hospital del Mar Medical Research Institute); 08003 Barcelona, Catalonia, Spain
| | - Antonio Segura
- Health Sciences Institute; 45600 Talavera de la Reina, Toledo, Spain
| | - Jordi Jimenez-Conde
- Department of Neurology; Neurovascular Research Group; IMIM-Hospital del Mar (Hospital del Mar Medical Research Institute); 08003 Barcelona, Catalonia, Spain
| | - Sebastián Moran
- Cancer Epigenetics and Biology Program (PEBC); Bellvitge Biomedical Research Institute (IDIBELL); 08908 Barcelona, Catalonia, Spain
| | - Carolina Soriano-Tárraga
- Department of Neurology; Neurovascular Research Group; IMIM-Hospital del Mar (Hospital del Mar Medical Research Institute); 08003 Barcelona, Catalonia, Spain
| | - Jaume Roquer
- Department of Neurology; Neurovascular Research Group; IMIM-Hospital del Mar (Hospital del Mar Medical Research Institute); 08003 Barcelona, Catalonia, Spain
| | | | - Jaume Marrugat
- Cardiovascular Epidemiology and Genetics Research Group; IMIM (Hospital del Mar Medical Research Institute); 08003 Barcelona, Catalonia, Spain
| | - Montse Fitó
- CIBER Obesity and Nutrition; 15706 Santiago de Compostela, Galicia, Spain
- Cardiovascular Risk and Nutrition Research Group; IMIM (Hospital del Mar Medical Research Institute); 08003 Barcelona, Catalonia, Spain
| | - Roberto Elosua
- Cardiovascular Epidemiology and Genetics Research Group; IMIM (Hospital del Mar Medical Research Institute); 08003 Barcelona, Catalonia, Spain
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Amend SR, Uluckan O, Hurchla M, Leib D, Novack DV, Silva M, Frazier W, Weilbaecher KN. Thrombospondin-1 regulates bone homeostasis through effects on bone matrix integrity and nitric oxide signaling in osteoclasts. J Bone Miner Res 2015; 30:106-15. [PMID: 25042340 PMCID: PMC4403870 DOI: 10.1002/jbmr.2308] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 06/24/2014] [Accepted: 06/28/2014] [Indexed: 01/25/2023]
Abstract
Thrombospondin-1 (TSP1), an endogenous antiangiogenic, is a widely expressed secreted ligand with roles in migration, adhesion, and proliferation and is a target for new therapeutics. While TSP1 is present in the bone matrix and several TSP1 receptors play roles in bone biology, the role of TSP1 in bone remodeling has not been fully elucidated. Bone turnover is characterized by coordinated activity of bone-forming osteoblasts (OB) and bone-resorbing osteoclasts (OC). TSP1-/- mice had increased bone mass and increased cortical bone size and thickness compared to wild type (WT). However, despite increased size, TSP1-/- femurs showed less resistance to bending than expected, indicative of diminished bone quality and a bone material defect. Additionally, we found that TSP1 deficiency resulted in decreased OC activity in vivo and reduced OC differentiation. TSP1 was critical during early osteoclastogenesis, and TSP1 deficiency resulted in a substantial overexpression of inducible nitric oxide synthase (iNOS). Importantly, administration of a NOS inhibitor rescued the OC function defects of TSP1-/- mice in vivo. To investigate the role of bone-derived TSP1 in osteoclastogenesis, we found that WT pre-OCs had defective iNOS expression when cultured on TSP1-/- bone compared to WT bone, suggesting that TSP1 in bone plays a critical role in iNOS signaling during OC development. These data implicate a new role for TSP1 in bone homeostasis with roles in maintaining bone matrix integrity and regulating OC formation. It will be critical to monitor bone health of patients administered TSP1-pathway directed therapeutics in clinical use and under development.
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Affiliation(s)
- Sarah R. Amend
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO
| | - Ozge Uluckan
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO
| | - Michelle Hurchla
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO
| | - Daniel Leib
- Department of Orthopedics, Washington University School of Medicine, St. Louis, MO
| | - Deborah Veis Novack
- Department of Medicine, Division of Bone and Mineral Research, Washington University School of Medicine, St. Louis, MO
| | - Matthew Silva
- Department of Orthopedics, Washington University School of Medicine, St. Louis, MO
| | - William Frazier
- Department of Biochemistry, Washington University School of Medicine, St. Louis, MO 63110
| | - Katherine N. Weilbaecher
- Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO
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55
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Increase in both angiogenic and angiostatic mediators in patients with idiopathic pulmonary fibrosis. ACTA ACUST UNITED AC 2014; 62:391-4. [DOI: 10.1016/j.patbio.2014.07.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 07/15/2014] [Indexed: 11/20/2022]
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Smadja DM, Dorfmüller P, Guerin CL, Bieche I, Badoual C, Boscolo E, Kambouchner M, Cazes A, Mercier O, Humbert M, Gaussem P, Bischoff J, Israël-Biet D. Cooperation between human fibrocytes and endothelial colony-forming cells increases angiogenesis via the CXCR4 pathway. Thromb Haemost 2014; 112:1002-13. [PMID: 25103869 DOI: 10.1160/th13-08-0711] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 06/17/2014] [Indexed: 02/07/2023]
Abstract
Fibrotic diseases of the lung are associated with a vascular remodelling process. Fibrocytes (Fy) are a distinct population of blood-borne cells that co-express haematopoietic cell antigens and fibroblast markers, and have been shown to contribute to organ fibrosis. The purpose of this study was to determine whether fibrocytes cooperate with endothelial colony-forming cells (ECFC) to induce angiogenesis. We isolated fibrocytes from blood of patient with idiopathic pulmonary fibrosis (IPF) and characterised them by flow cytometry, quantitative reverse transcriptase PCR (RTQ-PCR), and confocal microscopy. We then investigated the angiogenic interaction between fibrocytes and cord-blood-derived ECFC, both in vitro and in an in vivo Matrigel implant model. Compared to fibroblast culture medium, fibrocyte culture medium increased ECFC proliferation and differentiation via the SDF-1/CXCR4 pathway. IPF-Fy co-implanted with human ECFC in Matrigel plugs in immunodeficient mice formed functional microvascular beds, whereas fibroblasts did not. Evaluation of implants after two weeks revealed an extensive network of erythrocyte-containing blood vessels. CXCR4 blockade significantly inhibited this blood vessel formation. The clinical relevance of these data was confirmed by strong CXCR4 expression in vessels close to fibrotic areas in biopsy specimens from patients with IPF, by comparison with control lungs. In conclusion, circulating fibrocytes might contribute to the intense remodelling of the pulmonary vasculature in patients with idiopathic pulmonary fibrosis.
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Affiliation(s)
- David M Smadja
- Prof. David Smadja, Paris-Descartes University, INSERM UMR-S 1140, Hematology department, European Georges Pompidou hospital, 20 rue Leblanc, 75015 Paris, France, Tel.: +33 1 56093933, Fax: +33 1 56093393, E-mail:
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Rogers NM, Seeger F, Garcin ED, Roberts DD, Isenberg JS. Regulation of soluble guanylate cyclase by matricellular thrombospondins: implications for blood flow. Front Physiol 2014; 5:134. [PMID: 24772092 PMCID: PMC3983488 DOI: 10.3389/fphys.2014.00134] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Accepted: 03/18/2014] [Indexed: 01/16/2023] Open
Abstract
Nitric oxide (NO) maintains cardiovascular health by activating soluble guanylate cyclase (sGC) to increase cellular cGMP levels. Cardiovascular disease is characterized by decreased NO-sGC-cGMP signaling. Pharmacological activators and stimulators of sGC are being actively pursued as therapies for acute heart failure and pulmonary hypertension. Here we review molecular mechanisms that modulate sGC activity while emphasizing a novel biochemical pathway in which binding of the matricellular protein thrombospondin-1 (TSP1) to the cell surface receptor CD47 causes inhibition of sGC. We discuss the therapeutic implications of this pathway for blood flow, tissue perfusion, and cell survival under physiologic and disease conditions.
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Affiliation(s)
- Natasha M Rogers
- Department of Medicine, Vascular Medicine Institute, University of Pittsburgh School of Medicine Pittsburgh, PA, USA
| | - Franziska Seeger
- Department of Chemistry and Biochemistry, University of Maryland Baltimore County Baltimore, MD, USA
| | - Elsa D Garcin
- Department of Chemistry and Biochemistry, University of Maryland Baltimore County Baltimore, MD, USA
| | - David D Roberts
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, NIH Bethesda, MD, USA
| | - Jeffrey S Isenberg
- Department of Medicine, Vascular Medicine Institute, University of Pittsburgh School of Medicine Pittsburgh, PA, USA ; Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh School of Medicine Pittsburgh, PA, USA
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Sprague L, Muccioli M, Pate M, Singh M, Xiong C, Ostermann A, Niese B, Li Y, Li Y, Courreges MC, Benencia F. Dendritic cells: In vitro culture in two- and three-dimensional collagen systems and expression of collagen receptors in tumors and atherosclerotic microenvironments. Exp Cell Res 2014; 323:7-27. [PMID: 24569142 DOI: 10.1016/j.yexcr.2014.01.031] [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: 07/03/2012] [Revised: 01/25/2014] [Accepted: 01/28/2014] [Indexed: 12/24/2022]
Abstract
Dendritic cells (DCs) are immune cells found in the peripheral tissues where they sample the organism for infections or malignancies. There they take up antigens and migrate towards immunological organs to contact and activate T lymphocytes that specifically recognize the antigen presented by these antigen presenting cells. In the steady state there are several types of resident DCs present in various different organs. For example, in the mouse, splenic DC populations characterized by the co-expression of CD11c and CD8 surface markers are specialized in cross-presentation to CD8 T cells, while CD11c/SIRP-1α DCs seem to be dedicated to activating CD4 T cells. On the other hand, DCs have also been associated with the development of various diseases such as cancer, atherosclerosis, or inflammatory conditions. In such disease, DCs can participate by inducing angiogenesis or immunosuppression (tumors), promoting autoimmune responses, or exacerbating inflammation (atherosclerosis). This change in DC biology can be prompted by signals in the microenvironment. We have previously shown that the interaction of DCs with various extracellular matrix components modifies the immune properties and angiogenic potential of these cells. Building on those studies, herewith we analyzed the angiogenic profile of murine myeloid DCs upon interaction with 2D and 3D type-I collagen environments. As determined by PCR array technology and quantitative PCR analysis we observed that interaction with these collagen environments induced the expression of particular angiogenic molecules. In addition, DCs cultured on collagen environments specifically upregulated the expression of CXCL-1 and -2 chemokines. We were also able to establish DC cultures on type-IV collagen environments, a collagen type expressed in pathological conditions such as atherosclerosis. When we examined DC populations in atherosclerotic veins of Apolipoprotein E deficient mice we observed that they expressed adhesion molecules capable of interacting with collagen. Finally, to further investigate the interaction of DCs with collagen in other pathological conditions, we determined that both murine ovarian and breast cancer cells express several collagen molecules that can contribute to shape their particular tumor microenvironment. Consistently, tumor-associated DCs were shown to express adhesion molecules capable of interacting with collagen molecules as determined by flow cytometry analysis. Of particular relevance, tumor-associated DCs expressed high levels of CD305/LAIR-1, an immunosuppressive receptor. This suggests that signaling through this molecule upon interaction with collagen produced by tumor cells might help define the poorly immunogenic status of these cells in the tumor microenvironment. Overall, these studies demonstrate that through interaction with collagen proteins, DCs can be capable of modifying the microenvironments of inflammatory disease such as cancer or atherosclerosis.
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Affiliation(s)
- Leslee Sprague
- Biomedical Engineering Program, Russ College of Engineering and Technology, Ohio University, USA
| | - Maria Muccioli
- Molecular and Cellular Biology Program, Ohio University, USA
| | - Michelle Pate
- Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, USA
| | - Manindra Singh
- Molecular and Cellular Biology Program, Ohio University, USA
| | - Chengkai Xiong
- Biomedical Engineering Program, Russ College of Engineering and Technology, Ohio University, USA
| | - Alexander Ostermann
- Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, USA
| | - Brandon Niese
- Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, USA
| | - Yihan Li
- Molecular and Cellular Biology Program, Ohio University, USA
| | - Yandi Li
- Molecular and Cellular Biology Program, Ohio University, USA
| | - Maria Cecilia Courreges
- Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, USA
| | - Fabian Benencia
- Biomedical Engineering Program, Russ College of Engineering and Technology, Ohio University, USA; Molecular and Cellular Biology Program, Ohio University, USA; Diabetes Institute, Ohio University, USA; Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, USA.
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Qin Q, Qian J, Ge L, Shen L, Jia J, Jin J, Ge J. Effect and mechanism of thrombospondin-1 on the angiogenesis potential in human endothelial progenitor cells: an in vitro study. PLoS One 2014; 9:e88213. [PMID: 24505433 PMCID: PMC3914943 DOI: 10.1371/journal.pone.0088213] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Accepted: 01/04/2014] [Indexed: 12/02/2022] Open
Abstract
Objective Coronary collateral circulation plays a protective role in patients with coronary artery disease (CAD). We investigated whether thrombospondin-1(TSP-1) has an inhibitory effect on angiogenesis potential in endothelial progenitor cells(EPCs) and tested whether TSP-1 are altered in plasma of patients who had chronic total occlusion (CTO) in at least one coronary artery and with different collateral stages(according to Rentrop grading system). Methods and Results We isolated early and late EPCs from human cord blood and investigated a dose-dependent effect of TSP-1 on their angiogenesis potential by Matrigel angiogenesis assay. We found that TSP-1 (5 µg/ml) inhibited early EPCs incorporation into tubules after pretreatment for 1, 6 and 12 hours, respectively (83.3±11.9 versus 50.0±10.1 per field for 1 hour,161.7±12.6 versus 124.0±14.4 for 6 hours, 118.3±12.6 versus 68.0±20.1 for 12 hours, p<0.05). TSP-1 also inhibited late EPCs tubule formation at 1 µg/ml (6653.4±422.0 µm/HPFversus 5552.8±136.0 µm/HPF, p<0.05), and the inhibition was further enhanced at 5 µg/ml (6653.4±422.0 µm/HPF versus 2118.6±915.0 µm/HPF p<0.01). To explore the mechanism involved, a small interfering RNA was used. In vitro, CD47 siRNA significantly attenuated TSP-1's inhibition of angiogenesis on late EPCs and similar results were obtained after functional blocking by anti-CD47 antibody. Then we investigated pathways downstream of CD47 and found TSP-1 regulated VEGF-induced VEGFR2 phosphorylation via CD47. Furthermore, we examined plasma TSP-1 levels in patients with CTO who developed different stages of collaterals and found a paradoxical higher level of TSP-1 in patients with good collaterals compared with bad ones (612.9±554.0 ng/ml versus 224.4±132.4 ng/ml, p<0.05). Conclusion TSP-1 inhibited angiogenesis potential of early and late EPCs in vitro. This inhibition may be regulated by TSP-1's interaction with CD47, resulting in down regulation of VEGFR2 phosphorylation. In patients with CTO, there may be a self-adjustment mechanism in bad collaterals which is shown as low level of angiogenesis inhibitor TSP-1, and thus favoring collateral formation.
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Affiliation(s)
- Qing Qin
- Shanghai Institute of Cardiovascular Disease, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Juying Qian
- Shanghai Institute of Cardiovascular Disease, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Lei Ge
- Shanghai Institute of Cardiovascular Disease, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Li Shen
- Shanghai Institute of Cardiovascular Disease, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Jianguo Jia
- Shanghai Institute of Cardiovascular Disease, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Jianhao Jin
- Shanghai Institute of Cardiovascular Disease, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Junbo Ge
- Shanghai Institute of Cardiovascular Disease, Zhongshan Hospital, Fudan University, Shanghai, China
- * E-mail:
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60
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Mauge L, Sabatier F, Boutouyrie P, D'Audigier C, Peyrard S, Bozec E, Blanchard A, Azizi M, Dizier B, Dignat-George F, Gaussem P, Smadja DM. Forearm ischemia decreases endothelial colony-forming cell angiogenic potential. Cytotherapy 2014; 16:213-24. [DOI: 10.1016/j.jcyt.2013.09.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 09/18/2013] [Accepted: 09/28/2013] [Indexed: 01/03/2023]
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Rogers NM, Sharifi-Sanjani M, Csányi G, Pagano PJ, Isenberg JS. Thrombospondin-1 and CD47 regulation of cardiac, pulmonary and vascular responses in health and disease. Matrix Biol 2014; 37:92-101. [PMID: 24418252 DOI: 10.1016/j.matbio.2014.01.002] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2013] [Revised: 12/24/2013] [Accepted: 01/02/2014] [Indexed: 01/10/2023]
Abstract
Cardiovascular homeostasis and health is maintained through the balanced interactions of cardiac generated blood flow and cross-talk between the cellular components that comprise blood vessels. Central to this cross-talk is endothelial generated nitric oxide (NO) that stimulates relaxation of the contractile vascular smooth muscle (VSMC) layer of blood vessels. In cardiovascular disease this balanced interaction is disrupted and NO signaling is lost. Work over the last several years indicates that regulation of NO is much more complex than previously believed. It is now apparent that the secreted protein thrombospondin-1 (TSP1), that is upregulated in cardiovascular disease and animal models of the same, on activating cell surface receptor CD47, redundantly inhibits NO production and NO signaling. This inhibitory event has implications for baseline and disease-related responses mediated by NO. Further work has identified that TSP1-CD47 signaling stimulates enzymatic reactive oxygen species (ROS) production to further limit blood flow and promote vascular disease. Herein consideration is given to the most recent discoveries in this regard which identify the TSP1-CD47 axis as a major proximate governor of cardiovascular health.
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Affiliation(s)
- Natasha M Rogers
- Vascular Medicine Institute, University of Pittsburgh School of Medicine; Starzl Transplantation Institute, University of Pittsburgh, Pittsburgh, PA 15261, United States
| | | | - Gábor Csányi
- Vascular Medicine Institute, University of Pittsburgh School of Medicine; Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine
| | - Patrick J Pagano
- Vascular Medicine Institute, University of Pittsburgh School of Medicine; Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine
| | - Jeffrey S Isenberg
- Vascular Medicine Institute, University of Pittsburgh School of Medicine; Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh School of Medicine; Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine; Starzl Transplantation Institute, University of Pittsburgh, Pittsburgh, PA 15261, United States.
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HoWangYin KY, Loinard C, Bakker W, Guérin CL, Vilar J, D'Audigier C, Mauge L, Bruneval P, Emmerich J, Lévy BI, Pouysségur J, Smadja DM, Silvestre JS. HIF-Prolyl Hydroxylase 2 Inhibition Enhances the Efficiency of Mesenchymal Stem Cell-Based Therapies for the Treatment of Critical Limb Ischemia. Stem Cells 2014; 32:231-43. [DOI: 10.1002/stem.1540] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 08/05/2013] [Indexed: 12/22/2022]
Affiliation(s)
| | - Céline Loinard
- Institut de Radioprotection et de Sureté Nucléaire; Fontenay aux Roses France
| | | | | | - José Vilar
- INSERM UMRS 970; Fontenay aux Roses France
| | - Clément D'Audigier
- INSERM UMRS 765; Université Paris Descartes; Sorbonne Paris Cité Paris France
- AP-HP; Hôpital Européen Georges Pompidou; Service d'hématologie Biologique Paris France
| | - Laetitia Mauge
- INSERM UMRS 765; Université Paris Descartes; Sorbonne Paris Cité Paris France
- AP-HP; Hôpital Européen Georges Pompidou; Service d'hématologie Biologique Paris France
| | - Patrick Bruneval
- AP-HP; Hôpital Européen Georges Pompidou; Service d'anatomie Pathologique Paris France
| | - Joseph Emmerich
- INSERM UMRS 765; Université Paris Descartes; Sorbonne Paris Cité Paris France
| | | | - Jacques Pouysségur
- University of Nice, Institute of Research on Cancer & Aging (IRCAN)Centre A. Lacassagne, Nice, France and Centre Scientifique de Monaco
| | - David M. Smadja
- INSERM UMRS 765; Université Paris Descartes; Sorbonne Paris Cité Paris France
- AP-HP; Hôpital Européen Georges Pompidou; Service d'hématologie Biologique Paris France
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63
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Bigé N, Boffa JJ, Lepeytre F, Shweke N. [Role of thrombospondin-1 in the development of kidney diseases]. Med Sci (Paris) 2013; 29:1131-7. [PMID: 24356144 DOI: 10.1051/medsci/20132912017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Thrombospondin-1 (TSP-1) is a 450-kDa matricellar glycoprotein. By its various domains, it can interact with various partners and exhibit anti-angiogenic, pro-apoptotic and immunomodulatory activities. TSP-1 is also a major endogenous activator of the pro-fibrotic growth factor TGF-β. In healthy adult renal parenchyma, TSP-1 expression is very scarce and limited to Bowman's capsule and interstitium. During nephropathies, many cell types can express or secrete TSP-1 (mesangial, endothelial, smooth muscle, tubular cells, podocytes and fibroblasts) depending on the nature of injury and the evolutive stage of the disease. Inhibition of the different domains of TSP-1 using specific antibodies or peptides, blockade of TSP-1 expression by antisense oligonucleotides and use of knock-out mice, allowed to identify the role of TSP-1 in various models of experimental nephropathy. All these studies demonstrated a deleterious effect of TSP-1 on renal repair by inducing TGF-β and fibrosis, decreasing VEGF and capillary density, and enhancing inflammatory cells recruitment. Thus, TSP-1 represents a potential therapeutic target for the management of chronic kidney diseases.
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Affiliation(s)
- Naïke Bigé
- Service néphrologie et dialyse, Inserm UMRS 702, hôpital Tenon, 4, rue de la Chine, 75020 Paris, France
| | - Jean-Jacques Boffa
- Service néphrologie et dialyse, Inserm UMRS 702, hôpital Tenon, 4, rue de la Chine, 75020 Paris, France
| | - Fanny Lepeytre
- Service néphrologie et dialyse, Inserm UMRS 702, hôpital Tenon, 4, rue de la Chine, 75020 Paris, France
| | - Nasim Shweke
- Service néphrologie et dialyse, Inserm UMRS 702, hôpital Tenon, 4, rue de la Chine, 75020 Paris, France
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Silvestre JS, Smadja DM, Lévy BI. Postischemic revascularization: from cellular and molecular mechanisms to clinical applications. Physiol Rev 2013; 93:1743-802. [PMID: 24137021 DOI: 10.1152/physrev.00006.2013] [Citation(s) in RCA: 171] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
After the onset of ischemia, cardiac or skeletal muscle undergoes a continuum of molecular, cellular, and extracellular responses that determine the function and the remodeling of the ischemic tissue. Hypoxia-related pathways, immunoinflammatory balance, circulating or local vascular progenitor cells, as well as changes in hemodynamical forces within vascular wall trigger all the processes regulating vascular homeostasis, including vasculogenesis, angiogenesis, arteriogenesis, and collateral growth, which act in concert to establish a functional vascular network in ischemic zones. In patients with ischemic diseases, most of the cellular (mainly those involving bone marrow-derived cells and local stem/progenitor cells) and molecular mechanisms involved in the activation of vessel growth and vascular remodeling are markedly impaired by the deleterious microenvironment characterized by fibrosis, inflammation, hypoperfusion, and inhibition of endogenous angiogenic and regenerative programs. Furthermore, cardiovascular risk factors, including diabetes, hypercholesterolemia, hypertension, diabetes, and aging, constitute a deleterious macroenvironment that participates to the abrogation of postischemic revascularization and tissue regeneration observed in these patient populations. Thus stimulation of vessel growth and/or remodeling has emerged as a new therapeutic option in patients with ischemic diseases. Many strategies of therapeutic revascularization, based on the administration of growth factors or stem/progenitor cells from diverse sources, have been proposed and are currently tested in patients with peripheral arterial disease or cardiac diseases. This review provides an overview from our current knowledge regarding molecular and cellular mechanisms involved in postischemic revascularization, as well as advances in the clinical application of such strategies of therapeutic revascularization.
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65
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Kang MK, Lim SS, Lee JY, Yeo KM, Kang YH. Anthocyanin-rich purple corn extract inhibit diabetes-associated glomerular angiogenesis. PLoS One 2013; 8:e79823. [PMID: 24278186 PMCID: PMC3835931 DOI: 10.1371/journal.pone.0079823] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 10/04/2013] [Indexed: 01/05/2023] Open
Abstract
Diabetic nephropathy (DN) is one of the major diabetic complications and the leading cause of end-stage renal disease. Abnormal angiogenesis results in new vessels that are often immature and play a pathological role in DN, contributing to renal fibrosis and disrupting glomerular failure. Purple corn has been utilized as a daily food and exerts disease-preventive activities. This study was designed to investigate whether anthocyanin-rich purple corn extract (PCE) prevented glomerular angiogenesis under hyperglycemic conditions. Human endothelial cells were cultured in conditioned media of mesangial cells exposed to 33 mM high glucose (HG-HRMC-CM). PCE decreased endothelial expression of vascular endothelial growth factor (VEGF) and hypoxia inducible factor (HIF)-1α induced by HG-HRMC-CM. Additionally, PCE attenuated the induction of the endothelial marker of platelet endothelial cell adhesion molecule (PECAM)-1 and integrin β3 enhanced in HG-HRMC-CM. Endothelial tube formation promoted by HG-HRMC-CM was disrupted in the presence of PCE. In the in vivo study employing db/db mice treated with 10 mg/kg PCE for 8 weeks, PCE alleviated glomerular angiogenesis of diabetic kidneys by attenuating the induction of VEGF and HIF-1α. Oral administration of PCE retarded the endothelial proliferation in db/db mouse kidneys, evidenced by its inhibition of the induction of vascular endothelium-cadherin, PECAM-1 and Ki-67. PCE diminished the mesangial and endothelial induction of angiopoietin (Angpt) proteins under hypeglycemic conditions. The induction and activation of VEGF receptor 2 (VEGFR2) were dampened by treating PCE to db/db mice. These results demonstrate that PCE antagonized glomerular angiogenesis due to chronic hyperglycemia and diabetes through disturbing the Angpt-Tie-2 ligand-receptor system linked to renal VEGFR2 signaling pathway. Therefore, PCE may be a potent therapeutic agent targeting abnormal angiogenesis in DN leading to kidney failure.
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Affiliation(s)
- Min-Kyung Kang
- Department of Food and Nutrition and Center for Aging and Healthcare, Hallym University, Chuncheon, Korea
| | - Soon Sung Lim
- Department of Food and Nutrition and Center for Aging and Healthcare, Hallym University, Chuncheon, Korea
| | - Jae-Yong Lee
- Department of Biochemistry, School of Medicine, Hallym University, Chuncheon, Korea
| | | | - Young-Hee Kang
- Department of Food and Nutrition and Center for Aging and Healthcare, Hallym University, Chuncheon, Korea
- * E-mail:
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66
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Peter EA, Shen X, Shah SH, Pardue S, Glawe JD, Zhang WW, Reddy P, Akkus NI, Varma J, Kevil CG. Plasma free H2S levels are elevated in patients with cardiovascular disease. J Am Heart Assoc 2013; 2:e000387. [PMID: 24152982 PMCID: PMC3835249 DOI: 10.1161/jaha.113.000387] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
BACKGROUND Hydrogen sulfide (H2S) has been implicated in regulating cardiovascular pathophysiology in experimental models. However, there is a paucity of information regarding the levels of H2S in health and cardiovascular disease. In this study we examine the levels of H2S in patients with cardiovascular disease as well as bioavailability of nitric oxide and inflammatory indicators. METHODS AND RESULTS Patients over the age of 40 undergoing coronary or peripheral angiography were enrolled in the study. Ankle brachial index (ABI) measurement, measurement of plasma-free H2S and total nitric oxide (NO), thrombospondin-1 (TSP-1), Interleukin-6 (IL-6), and soluble intercellular adhesion molecule-1 (sICAM-1) levels were performed. Patients with either coronary artery disease alone (n = 66), peripheral arterial disease (PAD) alone (n = 13), or any vascular disease (n = 140) had higher plasma-free H2S levels compared to patients without vascular disease (n = 53). Plasma-free H2S did not distinguish between disease in different vascular beds; however, total NO levels were significantly reduced in PAD patients and the ratio of plasma free H2S to NO was significantly greater in patients with PAD. Lastly, plasma IL-6, ICAM-1, and TSP-1 levels did not correlate with H2S or NO bioavailability in either vascular disease condition. CONCLUSIONS Findings reported in this study reveal that plasma-free H2S levels are significantly elevated in vascular disease and identify a novel inverse relationship with NO bioavailability in patients with peripheral arterial disease.
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Affiliation(s)
- Elvis A Peter
- Section of Cardiology, LSU Health Shreveport, Shreveport, LA
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67
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Thrombospondin-1 signaling through CD47 inhibits self-renewal by regulating c-Myc and other stem cell transcription factors. Sci Rep 2013; 3:1673. [PMID: 23591719 PMCID: PMC3628113 DOI: 10.1038/srep01673] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Accepted: 04/02/2013] [Indexed: 12/11/2022] Open
Abstract
Signaling through the thrombospondin-1 receptor CD47 broadly limits cell and tissue survival of stress, but the molecular mechanisms are incompletely understood. We now show that loss of CD47 permits sustained proliferation of primary murine endothelial cells, increases asymmetric division, and enables these cells to spontaneously reprogram to form multipotent embryoid body-like clusters. c-Myc, Klf4, Oct4, and Sox2 expression is elevated in CD47-null endothelial cells, in several tissues of CD47- and thrombospondin-1-null mice, and in a human T cell line lacking CD47. CD47 knockdown acutely increases mRNA levels of c-Myc and other stem cell transcription factors in cells and in vivo, whereas CD47 ligation by thrombospondin-1 suppresses c-Myc expression. The inhibitory effects of increasing CD47 levels can be overcome by maintaining c-Myc expression and are absent in cells with dysregulated c-Myc. Thus, CD47 antagonists enable cell self-renewal and reprogramming by overcoming negative regulation of c-Myc and other stem cell transcription factors.
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68
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Rocchiccioli S, Pelosi G, Rosini S, Marconi M, Viglione F, Citti L, Ferrari M, Trivella MG, Cecchettini A. Secreted proteins from carotid endarterectomy: an untargeted approach to disclose molecular clues of plaque progression. J Transl Med 2013; 11:260. [PMID: 24131807 PMCID: PMC3853772 DOI: 10.1186/1479-5876-11-260] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Accepted: 09/18/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Atherosclerosis is the main cause of morbidity and mortality in Western countries and carotid plaque rupture is associated to acute events and responsible of 15-20% of all ischemic strokes. Several proteomics approaches have been up to now used to elucidate the molecular mechanisms involved in plaque formation as well as to identify markers of pathology severity for early diagnosis or target of therapy. The aim of this study was to characterize the plaque secretome. The advantage of this approach is that secretome mimics the in vivo condition and implies a reduced complexity compared to the whole tissue proteomics allowing the detection of under-represented potential biomarkers. METHODS Secretomes from carotid endarterectomy specimens of 14 patients were analyzed by a liquid chromatography approach coupled with label free mass spectrometry. Differential expression of proteins released from plaques and from their downstream distal side segments were evaluated in each specimen. Results were validated by Western blot analysis and ELISA assays. Histology and immunohistochemistry were performed to characterize plaques and to localise the molecular factors highlighted by proteomics. RESULTS A total of 463 proteins were identified and 31 proteins resulted differentially secreted from plaques and corresponding downstream segments. A clear-cut distinction in the distribution of cellular- and extracellular-derived proteins, evidently related to the higher cellularity of distal side segments, was observed along the longitudinal axis of carotid endarterectomy samples. The expressions of thrombospondin-1, vitamin D binding protein, and vinculin, as examples of extracellular and intracellular proteins, were immunohistologically compared between adjacent segments and validated by antibody assays. ELISA assays of plasma samples from 34 patients and 10 healthy volunteers confirmed a significantly higher concentration of thrombospondin-1 and vitamin D binding protein in atherosclerotic subjects. CONCLUSIONS Taking advantage of the optimized workflow, a detailed protein profile related to carotid plaque secretome has been produced which may assist and improve biomarker discovery of molecular factors in blood. Distinctive signatures of proteins secreted by adjacent segments of carotid plaques were evidenced and they may help discriminating markers of plaque complication from those of plaque growth.
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Affiliation(s)
- Silvia Rocchiccioli
- National Research Council, Institute of Clinical Physiology, Via Moruzzi, Pisa, Italy.
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69
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Krishna SM, Golledge J. The role of thrombospondin-1 in cardiovascular health and pathology. Int J Cardiol 2013; 168:692-706. [DOI: 10.1016/j.ijcard.2013.04.139] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2012] [Revised: 03/09/2013] [Accepted: 04/06/2013] [Indexed: 10/26/2022]
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70
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Golledge J, Clancy P, Hankey GJ, Norman PE. Relation between serum thrombospondin-2 and cardiovascular mortality in older men screened for abdominal aortic aneurysm. Am J Cardiol 2013; 111:1800-4. [PMID: 23528028 DOI: 10.1016/j.amjcard.2013.02.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Revised: 02/05/2013] [Accepted: 02/05/2013] [Indexed: 10/27/2022]
Abstract
Thrombospondin-1 and -2 (TSP-1 and -2) have been implicated in the regulation of angiogenesis, thrombosis, and inflammation, which are believed to be critical in the pathogenesis of cardiovascular events. The aim of this study was to assess whether serum TSP-1 and TSP-2 concentrations were associated with cardiovascular mortality in older men. A cohort of 992 elderly men was recruited between 2001 and 2004, and blood was collected for assessment of serum TSP-1 and TSP-2 by immunoassay. The men were followed by means of the Western Australia Data Linkage System until July 31, 2009. The association of TSP-1 and TSP-2 with mortality was assessed using Kaplan-Meier estimates and Cox proportional hazard analysis. Serum TSP-2 quartile was strongly positively associated with all-cause and cardiovascular mortality. Men with serum TSP-2 in the first, second, third, and fourth quartiles had a cumulative incidence of cardiovascular mortality of 3.3%, 8.0%, 9.7%, and 12.5% at 5 years, respectively, p = 0.001. Men with serum TSP-2 in the highest quartile had a 3.37-fold (95% confidence interval: 1.53-7.44, p = 0.003) increased risk of cardiovascular mortality after adjusting for other cardiovascular risk factors. Most deaths were secondary to cardiac causes, and serum TSP-2 was also independently associated with cardiac mortality (relative risk: 3.55, 95% confidence interval: 1.54-8.20 for men in the top compared with the lowest quartile). Serum TSP-1 was not associated with cardiovascular mortality. In conclusion, increased serum TSP-2 concentration is independently and significantly associated with the risk of cardiac mortality in older men.
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71
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Roudier E, Milkiewicz M, Birot O, Slopack D, Montelius A, Gustafsson T, Paik JH, DePinho RA, Casale GP, Pipinos II, Haas TL. Endothelial FoxO1 is an intrinsic regulator of thrombospondin 1 expression that restrains angiogenesis in ischemic muscle. Angiogenesis 2013; 16:759-72. [PMID: 23677673 DOI: 10.1007/s10456-013-9353-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Accepted: 05/03/2013] [Indexed: 10/26/2022]
Abstract
Peripheral artery disease (PAD) is characterized by chronic muscle ischemia. Compensatory angiogenesis is minimal within ischemic muscle despite an increase in angiogenic factors. This may occur due to the prevalence of angiostatic factors. Regulatory mechanisms that could evoke an angiostatic environment during ischemia are largely unknown. Forkhead box O (FoxO) transcription factors, known to repress endothelial cell proliferation in vitro, are potential candidates. Our goal was to determine whether FoxO proteins promote an angiostatic phenotype within ischemic muscle. FoxO1 and the angiostatic matrix protein thrombospondin 1 (THBS1) were elevated in ischemic muscle from PAD patients, or from mice post-femoral artery ligation. Mice with conditional endothelial cell-directed deletion of FoxO proteins (Mx1Cre (+), FoxO1,3,4 (L/L) , referred to as FoxOΔ) were used to assess the role of endothelial FoxO proteins within ischemic tissue. FoxO deletion abrogated the elevation of FoxO1 and THBS1 proteins, enhanced hindlimb blood flow recovery and improved neovascularization in murine ischemic muscle. Endothelial cell outgrowth from 3D explant cultures was more robust in muscles derived from FoxOΔ mice. FoxO1 overexpression induced THBS1 production, and a direct interaction of endogenous FoxO1 with the THBS1 promoter was detectable in primary endothelial cells. We provide evidence that FoxO1 directly regulates THBS1 within ischemic muscle. Altogether, these findings bring novel insight into the regulatory mechanisms underlying the repression of angiogenesis within peripheral ischemic tissues.
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Affiliation(s)
- Emilie Roudier
- Angiogenesis Research Group, Faculty of Health, York University, Rm. 341 Farquharson Building, 4700 Keele St., Toronto, ON, M3J 1P3, Canada
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72
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Caporali A, Meloni M, Miller AM, Vierlinger K, Cardinali A, Spinetti G, Nailor A, Faglia E, Losa S, Gotti A, Fortunato O, Mitic T, Hofner M, Noehammer C, Madeddu P, Emanueli C. Soluble ST2 is regulated by p75 neurotrophin receptor and predicts mortality in diabetic patients with critical limb ischemia. Arterioscler Thromb Vasc Biol 2012; 32:e149-60. [PMID: 23065828 PMCID: PMC3616363 DOI: 10.1161/atvbaha.112.300497] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVE The p75 neurotrophin receptor (p75(NTR)) contributes to diabetes mellitus-induced defective postischemic neovascularization. The interleukin-33 receptor ST2 is expressed as transmembrane (ST2L) and soluble (sST2) isoforms. Here, we studied the following: (1) the impact of p75(NTR) in the healing of ischemic and diabetic calf wounds; (2) the link between p75(NTR) and ST2; and (3) circulating sST2 levels in critical limb ischemia (CLI) patients. METHODS AND RESULTS Diabetes mellitus was induced in p75(NTR) knockout (p75KO) mice and wild-type (WT) littermates by streptozotocin. Diabetic and nondiabetic p75KO and WT mice received left limb ischemia induction and a full-thickness wound on the ipsilateral calf. Diabetes mellitus impaired wound closure and angiogenesis and increased ST2 expression in WT, but not in p75KO wounds. In cultured endothelial cells, p75(NTR) promoted ST2 (both isoforms) expression through p38(MAPK)/activating transcription factor 2 pathway activation. Next, sST2 was measured in the serum of patients with CLI undergoing either revascularization or limb amputation and in the 2 nondiabetic groups (with CLI or nonischemic individuals). Serum sST2 increased in diabetic patients with CLI and was directly associated with higher mortality at 1 year from revascularization. CONCLUSIONS p75(NTR) inhibits the healing of ischemic lower limb wounds in diabetes mellitus and promotes ST2 expression. Circulating sST2 predicts mortality in diabetic CLI patients.
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MESH Headings
- Activating Transcription Factor 2/metabolism
- Aged
- Aged, 80 and over
- Animals
- Biomarkers/metabolism
- Cells, Cultured
- Diabetes Complications/complications
- Diabetes Mellitus/metabolism
- Diabetes Mellitus/mortality
- Diabetes Mellitus/physiopathology
- Diabetes Mellitus, Experimental/chemically induced
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Experimental/physiopathology
- Disease Models, Animal
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/metabolism
- Endothelium, Vascular/pathology
- Female
- Humans
- Interleukin-1 Receptor-Like 1 Protein
- Ischemia/etiology
- Ischemia/physiopathology
- Lower Extremity/blood supply
- Male
- Mice
- Mice, Knockout
- Middle Aged
- Nerve Tissue Proteins/pharmacology
- Nerve Tissue Proteins/physiology
- Predictive Value of Tests
- Receptors, Cell Surface/metabolism
- Receptors, Interleukin/metabolism
- Receptors, Nerve Growth Factor/deficiency
- Receptors, Nerve Growth Factor/genetics
- Receptors, Nerve Growth Factor/physiology
- Streptozocin/adverse effects
- Wound Healing/physiology
- p38 Mitogen-Activated Protein Kinases/metabolism
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Affiliation(s)
- Andrea Caporali
- Laboratories of Vascular Pathology and Regeneration, School of Clinical Sciences, University of Bristol, Bristol, England, United Kingdom
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73
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Rogers NM, Thomson AW, Isenberg JS. Activation of parenchymal CD47 promotes renal ischemia-reperfusion injury. J Am Soc Nephrol 2012; 23:1538-50. [PMID: 22859854 DOI: 10.1681/asn.2012020137] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Ischemia-reperfusion injury (IRI) contributes to decreased allograft function and allograft rejection in transplanted kidneys. Thrombospondin-1 is a stress protein typically secreted in response to hypoxia and the ligand activator for the ubiquitously expressed receptor CD47. The function of activated CD47 in IRI remains completely unknown. Here, we found that both CD47 and its ligand thrombospondin-1 were upregulated after renal IRI in mice. CD47-knockout mice were protected against renal dysfunction and tubular damage, suggesting that the development of IRI requires intact CD47 signaling. Chimeric CD47-knockout mice engrafted with wild-type hematopoietic cells had significantly lower serum creatinine and less tubular damage than wild-type controls after IRI, suggesting that CD47 signaling in parenchymal cells predominantly mediates renal damage. Treatment with a CD47-blocking antibody protected mice from renal dysfunction and tubular damage compared with an isotype control. Taken together, these data imply that CD47 on parenchymal cells promotes injury after renal ischemia and reperfusion. Therefore, CD47 blockade may have therapeutic potential to prevent or suppress ischemia-reperfusion-mediated damage.
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Affiliation(s)
- Natasha M Rogers
- Division of Pulmonary Allergy and Critical Care Medicine, Vascular Medicine Institute, University of Pittsburgh School of Medicine, E1240 Biomedical Science Tower, Room E1258, 200 Lothrop Street, Pittsburgh, PA 15261, USA
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74
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Dias JV, Benslimane-Ahmim Z, Egot M, Lokajczyk A, Grelac F, Galy-Fauroux I, Juliano L, Le-Bonniec B, Takiya CM, Fischer AM, Blanc-Brude O, Morandi V, Boisson-Vidal C. A motif within the N-terminal domain of TSP-1 specifically promotes the proangiogenic activity of endothelial colony-forming cells. Biochem Pharmacol 2012; 84:1014-23. [PMID: 22796565 DOI: 10.1016/j.bcp.2012.07.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 06/28/2012] [Accepted: 07/05/2012] [Indexed: 01/09/2023]
Abstract
Thrombospondin-1 (TSP-1) gives rise to fragments that have both pro- and anti-angiogenic effects in vitro and in vivo. The TSP-HepI peptide (2.3 kDa), located in the N-terminal domain of TSP-1, has proangiogenic effects on endothelial cells. We have previously shown that TSP-1 itself exhibits a dual effect on endothelial colony-forming cells (ECFC) by enhancing their adhesion through its TSP-HepI fragment while reducing their proliferation and differentiation into vascular tubes (tubulogenesis) in vitro. This effect is likely mediated through CD47 binding to the TSP-1 C-terminal domain. Here we investigated the effect of TSP-HepI peptide on the angiogenic properties of ECFC in vitro and in vivo. TSP-HepI peptide potentiated FGF-2-induced neovascularisation by enhancing ECFC chemotaxis and tubulogenesis in a Matrigel plug assay. ECFC exposure to 20 μg/mL of TSP-HepI peptide for 18 h enhanced cell migration (p < 0.001 versus VEGF exposure), upregulated alpha 6-integrin expression, and enhanced their cell adhesion to activated endothelium under physiological shear stress conditions at levels comparable to those of SDF-1α. The adhesion enhancement appeared to be mediated by the heparan sulfate proteoglycan (HSPG) syndecan-4, as ECFC adhesion was significantly reduced by a syndecan-4-neutralising antibody. ECFC migration and tubulogenesis were stimulated neither by a TSP-HepI peptide with a modified heparin-binding site (S/TSP-HepI) nor when the glycosaminoglycans (GAGs) moieties were removed from the ECFC surface by enzymatic treatment. Ex vivo TSP-HepI priming could potentially serve to enhance the effectiveness of therapeutic neovascularisation with ECFC.
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Affiliation(s)
- Juliana Vieira Dias
- Departamento de Biologia Celular, Laboratório de Biologia da Célula Endotelial e da Angiogênese (LabAngio), Instituto de Biologia Roberto Alcantara Gomes, Universidade do Estado do Rio de Janeiro, UERJ, Rio de Janeiro, RJ, Brazil.
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Ho JCY, Lai WH, Li MF, Au KW, Yip MC, Wong NLY, Ng ESK, Lam FFY, Siu CW, Tse HF. Reversal of endothelial progenitor cell dysfunction in patients with type 2 diabetes using a conditioned medium of human embryonic stem cell-derived endothelial cells. Diabetes Metab Res Rev 2012; 28:462-73. [PMID: 22492468 DOI: 10.1002/dmrr.2304] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND The potential clinical application of bone marrow or peripheral blood-derived progenitor cells for cardiovascular regeneration in patients with diabetes mellitus (DM) is limited by their functional impairment. We sought to determine the mechanisms of impaired therapeutic efficacy of peripheral blood-derived progenitor cells in type 2 DM patients and evaluated the use of cell-free conditioned medium obtained from human embryonic stem cell-derived endothelial-like cells (ESC-ECs) to reverse their functional impairment. METHODS The angiogenic potential of late outgrowth endothelial cells (OECs) and cytokine profile of the conditional medium of proangiogenic cells (PACs) derived from peripheral blood-mononuclear cells of healthy control and DM patients and ESC-ECs was compared by in vitro tube formation assay and a multiplex bead-based immunoassay kit, respectively. The in vivo angiogenic potential of ESC-ECs derived conditioned medium in rescuing the functional impairment of PB-PACs in DM patients was investigated using a hindlimb ischemia model. RESULTS Human ESC-ECs had similar functional and phenotypic characteristics as OECs in healthy controls. Cytokine profiling showed that vascular endothelial growth factor, stromal cell-derived factor 1 and placental growth factor were down-regulated in PACs from DM patients. Tube formation assay that revealed functional impairment of OECs from DM patients could be rescued by ESC-ECs conditioned medium. Administration of ESC-ECs conditioned medium restored the therapeutic efficacy of PB-PACs from DM patients in a mouse model of hindlimb ischemia. CONCLUSIONS Our results showed that peripheral blood-derived progenitor cells from DM patients have impaired function because of defective secretion of angiogenic cytokines, which could be restored by supplementation of ESC-ECs conditioned medium.
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Affiliation(s)
- Jenny C Y Ho
- Cardiology Division, Department of Medicine, The University of Hong Kong, Hong Kong, HKSAR, China
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Roberts DD, Miller TW, Rogers NM, Yao M, Isenberg JS. The matricellular protein thrombospondin-1 globally regulates cardiovascular function and responses to stress via CD47. Matrix Biol 2012; 31:162-9. [PMID: 22266027 PMCID: PMC3295899 DOI: 10.1016/j.matbio.2012.01.005] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2011] [Revised: 12/08/2011] [Accepted: 12/10/2011] [Indexed: 01/31/2023]
Abstract
Matricellular proteins play diverse roles in modulating cell behavior by engaging specific cell surface receptors and interacting with extracellular matrix proteins, secreted enzymes, and growth factors. Studies of such interactions involving thrombospondin-1 have revealed several physiological functions and roles in the pathogenesis of injury responses and cancer, but the relatively mild phenotypes of mice lacking thrombospondin-1 suggested that thrombospondin-1 would not be a central player that could be exploited therapeutically. Recent research focusing on signaling through its receptor CD47, however, has uncovered more critical roles for thrombospondin-1 in acute regulation of cardiovascular dynamics, hemostasis, immunity, and mitochondrial homeostasis. Several of these functions are mediated by potent and redundant inhibition of the canonical nitric oxide pathway. Conversely, elevated tissue thrombospondin-1 levels in major chronic diseases of aging may account for the deficient nitric oxide signaling that characterizes these diseases, and experimental therapeutics targeting CD47 show promise for treating such chronic diseases as well as acute stress conditions that are associated with elevated thrombospondin-1 expression.
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Affiliation(s)
- David D. Roberts
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892
| | - Thomas W. Miller
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892
| | - Natasha M. Rogers
- Division of Pulmonary, Allergy and Critical Care Medicine and the Vascular Medicine Institute of the University of Pittsburgh, Pittsburgh, PA 15213
| | - Mingyi Yao
- Division of Pulmonary, Allergy and Critical Care Medicine and the Vascular Medicine Institute of the University of Pittsburgh, Pittsburgh, PA 15213
| | - Jeffrey S. Isenberg
- Division of Pulmonary, Allergy and Critical Care Medicine and the Vascular Medicine Institute of the University of Pittsburgh, Pittsburgh, PA 15213
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77
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Masud R, Shameer K, Dhar A, Ding K, Kullo IJ. Gene expression profiling of peripheral blood mononuclear cells in the setting of peripheral arterial disease. J Clin Bioinforma 2012; 2:6. [PMID: 22409835 PMCID: PMC3381689 DOI: 10.1186/2043-9113-2-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Accepted: 03/12/2012] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Peripheral arterial disease (PAD) is a relatively common manifestation of systemic atherosclerosis that leads to progressive narrowing of the lumen of leg arteries. Circulating monocytes are in contact with the arterial wall and can serve as reporters of vascular pathology in the setting of PAD. We performed gene expression analysis of peripheral blood mononuclear cells (PBMC) in patients with PAD and controls without PAD to identify differentially regulated genes. METHODS PAD was defined as an ankle brachial index (ABI) ≤0.9 (n = 19) while age and gender matched controls had an ABI > 1.0 (n = 18). Microarray analysis was performed using Affymetrix HG-U133 plus 2.0 gene chips and analyzed using GeneSpring GX 11.0. Gene expression data was normalized using Robust Multichip Analysis (RMA) normalization method, differential expression was defined as a fold change ≥1.5, followed by unpaired Mann-Whitney test (P < 0.05) and correction for multiple testing by Benjamini and Hochberg False Discovery Rate. Meta-analysis of differentially expressed genes was performed using an integrated bioinformatics pipeline with tools for enrichment analysis using Gene Ontology (GO) terms, pathway analysis using Kyoto Encyclopedia of Genes and Genomes (KEGG), molecular event enrichment using Reactome annotations and network analysis using Ingenuity Pathway Analysis suite. Extensive biocuration was also performed to understand the functional context of genes. RESULTS We identified 87 genes differentially expressed in the setting of PAD; 40 genes were upregulated and 47 genes were downregulated. We employed an integrated bioinformatics pipeline coupled with literature curation to characterize the functional coherence of differentially regulated genes. CONCLUSION Notably, upregulated genes mediate immune response, inflammation, apoptosis, stress response, phosphorylation, hemostasis, platelet activation and platelet aggregation. Downregulated genes included several genes from the zinc finger family that are involved in transcriptional regulation. These results provide insights into molecular mechanisms relevant to the pathophysiology of PAD.
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Affiliation(s)
- Rizwan Masud
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester MN 55905, USA
| | - Khader Shameer
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester MN 55905, USA
| | - Aparna Dhar
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester MN 55905, USA
| | - Keyue Ding
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester MN 55905, USA
| | - Iftikhar J Kullo
- Division of Cardiovascular Diseases, Mayo Clinic, Rochester MN 55905, USA
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78
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Döring Y, Noels H, Weber C. The Use of High-Throughput Technologies to Investigate Vascular Inflammation and Atherosclerosis. Arterioscler Thromb Vasc Biol 2012; 32:182-95. [DOI: 10.1161/atvbaha.111.232686] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The greatest challenge of scientific research is to understand the causes and consequences of disease. In recent years, great efforts have been devoted to unraveling the basic mechanisms of atherosclerosis (the underlying pathology of cardiovascular disease), which remains a major cause of morbidity and mortality worldwide. Because of the complex and multifactorial pathophysiology of cardiovascular disease, different research techniques have increasingly been combined to unravel genetic aspects, molecular pathways, and cellular functions involved in atherogenesis, vascular inflammation, and dyslipidemia to gain a multifaceted picture addressing this complexity. Thanks to the rapid evolution of high-throughput technologies, we are now able to generate large-scale data on the DNA, RNA, and protein levels. With the help of sophisticated computational tools, these data sets are integrated to enhance information extraction and are being increasingly used in a systems biology approach to model biological processes as interconnected and regulated networks. This review exemplifies the use of high-throughput technologies—such as genomics, transcriptomics, proteomics, and epigenomics—and systems biology to explore pathomechanisms of vascular inflammation and atherosclerosis.
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Affiliation(s)
- Yvonne Döring
- From the Institute for Cardiovascular Prevention, Ludwig-Maximilians-University Munich, Munich, Germany (Y.D., C.W.); Institute for Molecular Cardiovascular Research, Rheinisch-Westfälische Technische Hochschule Aachen University, University Clinic Aachen, Aachen, Germany (H.N.); Munich Heart Alliance, Munich, Germany (C.W.); Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, the Netherlands (C.W.)
| | - Heidi Noels
- From the Institute for Cardiovascular Prevention, Ludwig-Maximilians-University Munich, Munich, Germany (Y.D., C.W.); Institute for Molecular Cardiovascular Research, Rheinisch-Westfälische Technische Hochschule Aachen University, University Clinic Aachen, Aachen, Germany (H.N.); Munich Heart Alliance, Munich, Germany (C.W.); Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, the Netherlands (C.W.)
| | - Christian Weber
- From the Institute for Cardiovascular Prevention, Ludwig-Maximilians-University Munich, Munich, Germany (Y.D., C.W.); Institute for Molecular Cardiovascular Research, Rheinisch-Westfälische Technische Hochschule Aachen University, University Clinic Aachen, Aachen, Germany (H.N.); Munich Heart Alliance, Munich, Germany (C.W.); Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, the Netherlands (C.W.)
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79
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Quantitative proteomics analysis by isobaric tags for relative and absolute quantitation identified Lumican as a potential marker for acute aortic dissection. J Biomed Biotechnol 2011; 2011:920763. [PMID: 22228989 PMCID: PMC3250623 DOI: 10.1155/2011/920763] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 10/27/2011] [Accepted: 10/27/2011] [Indexed: 11/18/2022] Open
Abstract
Acute aortic dissection (AAD) is a serious vascular disease. Currently the diagnosis relies on clinical and radiological means whereas serum biomarkers are lacking. The purpose of this study was to identify potential serum biomarkers for AAD using isobaric tags for relative and absolute quantitation (iTRAQ) approach. A total of 120 serum samples were collected from three groups: AAD patients (n = 60), patients with acute myocardial infarction (AMI, n = 30), and healthy volunteers (n = 30), whereas the first 10 samples from each group were used for iTRAQ analysis. Using iTRAQ approach, a total of 174 proteins were identified as significantly different between AAD patients and healthy subjects. Among them, forty-six proteins increased more than twofold, full-scale analysis using serum sample for the entire 120 subjects demonstrated that Lumican level was significantly increased relative to control and AMI samples. Further, Lumican level correlated with time from onset to admission in AAD but not AMI samples. Using iTRAQ approach, our study showed that Lumican may be a potential AAD-related serum marker that may assist the diagnosis of AAD.
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80
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Proteomic analysis of intra-arterial thrombus secretions reveals a negative association of clusterin and thrombospondin-1 with abdominal aortic aneurysm. Atherosclerosis 2011; 219:432-9. [DOI: 10.1016/j.atherosclerosis.2011.08.013] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Revised: 07/01/2011] [Accepted: 08/07/2011] [Indexed: 11/18/2022]
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81
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Smadja DM, Duong-van-Huyen JP, Dal Cortivo L, Blanchard A, Bruneval P, Emmerich J, Gaussem P. Early endothelial progenitor cells in bone marrow are a biomarker of cell therapy success in patients with critical limb ischemia. Cytotherapy 2011; 14:232-9. [PMID: 22040109 DOI: 10.3109/14653249.2011.627917] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND AIMS Endothelial progenitor cells (EPC) have been proposed for autologous angiogenic therapy. The objectives of this study were to quantify EPC in the peripheral blood and bone marrow mononuclear cells (BM-MNC) of patients with critical limb ischemia that had received BM-MNC as a cell therapy product, and to study the putative relationship between the presence of EPC and the process of neovascularization in toe or transmetatarsal amputation specimens. METHODS Early and late endothelial progenitor cells (CFU-EC and ECFC) were cultivated and quantified according to published methods in peripheral blood and BM-MNC from patients with critical limb ischemia (CLI; n = 11) enrolled in the OPTIPEC trial ( http://clinicaltrials.gov/ct2/show/NCT00377897 ) to receive BM-MNC as a cell therapy product. RESULTS Eight out of the 11 patients had undergone amputations. Three of the patients displayed a neoangiogenic process that was associated with a higher number of CFU-EC in BM-MNC, while CD3+ , CFU-GM and CD34+ in BM-MNC, and EPC in peripheral blood, did not correlate with the appearance of newly formed vessels. As expected, circulating CFU-EC and ECFC counts were significantly lower in CLI patients compared with age-matched controls. CONCLUSIONS In patients with critical limb ischemia, EPC in peripheral blood were decreased compared with healthy individuals. However, in BM-MNC we found that relative numbers of CFU-EC could be used as an indicator to discriminate patients with neoangiogenic processes. These results need to be confirmed in a randomized study.
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Affiliation(s)
- David M Smadja
- Université Paris Descartes, Paris, France Sorbonne Paris Cite, France.
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82
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Sounni NE, Paye A, Host L, Noël A. MT-MMPS as Regulators of Vessel Stability Associated with Angiogenesis. Front Pharmacol 2011; 2:111. [PMID: 21687519 PMCID: PMC3108474 DOI: 10.3389/fphar.2011.00111] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Accepted: 04/27/2011] [Indexed: 12/14/2022] Open
Abstract
The development of vascular system depends on the coordinated activity of a number of distinct families of molecules including growth factors and their receptors, cell adhesion molecules, extracellular matrix (ECM) molecules, and proteolytic enzymes. Matrix metalloproteases (MMPs) are a family of ECM degrading enzymes required for both physiological and pathological angiogenesis. Increasing evidence, point to a direct role of membrane type-MMPs (MT-MMPs) in vascular system stabilization, maturation, and leakage. Our understanding of the nature of MT-MMP interaction with extracellular and cell surface molecules and their multiple roles in vessel walls and perivascular stroma may provide new insights into mechanisms underlying vascular cell–ECM interactions and cell fate decisions in pathological conditions. Regulation of vascular leakage by MT-MMP interactions with the ECM could also lead to novel targeting opportunities for drug delivery in tumor. This review will shed lights on the emerging roles of MT1-MMP and MT4-MMP in vascular system alterations associated with cancer progression.
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Affiliation(s)
- Nor Eddine Sounni
- Laboratory of Tumor and Developmental Biology, Groupe Interdisciplinaire de Génoprotéomique Appliquée-Cancer, University of Liege Liège, Belgium
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83
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Ochoa CD, Fouty BW, Hales CA. Thrombospondin-1, endothelium and systemic vascular tone. Future Cardiol 2011; 7:169-72. [DOI: 10.2217/fca.11.7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Evaluation of: Bauer EM, Qin Y, Miller TW et al.: Thrombospondin-1 supports blood pressure by limiting eNOS activation and endothelial dependent vasorelaxation. Cardiovasc. Res. 88, 471–481 (2010). Several lines of evidence, both in vivo and ex vivo, suggest that thrombospondin-1 (TSP-1) is important in maintaining systemic vascular tone. Recently published papers demonstrate that TSP-1 can inhibit vascular smooth muscle relaxation by interfering with the interaction between nitric oxide (NO) and soluble guanylyl cyclase, providing a possible mechanism of action to explain this observation. While these in vitro experiments in vascular smooth muscle cells were provocative, it is not clear how such a large protein circulating in the plasma could cross the intact endothelial basal membrane and regulate NO/cGMP signaling in smooth muscle in vivo. This raised the question of whether TSP-1 could modulate NO/cGMP signaling through another mechanism. Herein, we evaluate a recently published paper by Bauer and colleagues that examined whether TSP-1 could exert vasoactive effects without directly accessing the vascular smooth muscle. In their studies they found that TSP-1 could inhibit the NO/cGMP signaling pathway through an alternate mechanism: inhibiting the activation of endothelial NO synthase (eNOS), and therefore NO production in endothelial cells. These findings, combined with previous results from these investigators, suggest that TSP-1 can blunt NO/cGMP signaling through two different mechanisms: inhibiting NO production in endothelial cells by preventing the agonist-induced influx of Ca2+ required to activate endothelial NO synthase and blunting the ability of endothelial-derived NO to activate soluble guanylyl cyclase in vascular smooth muscle cells. The importance of these two pathways in supporting systemic and pulmonary vascular tone in health and disease is unclear.
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Affiliation(s)
| | - Brian W Fouty
- Department of Pharmacology, University of South Alabama, Mobile, AL, USA
- Center for Lung Biology, University of South Alabama, Mobile, AL, USA
- Department of Medicine, University of South Alabama, Mobile, AL, USA
| | - Charles A Hales
- Pulmonary/Critical Care Unit, Department of Medicine, Massachusetts General Hospital & Harvard Medical School, Boston, MA, USA
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84
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Goodman MG. Mechanism of synergy between T cell signals and C8-substituted guanine nucleosides in humoral immunity: B lymphotropic cytokines induce responsiveness to 8-mercaptoguanosine. Br J Pharmacol 1986; 167:1415-30. [PMID: 3514757 DOI: 10.1111/j.1476-5381.2012.02099.x] [Citation(s) in RCA: 124] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
B lymphocytes require a source of T cell-like help to produce antibody to T cell-dependent antigens. T cell-derived lymphokines and C8-substituted guanine ribonucleosides (such as 8-mercaptoguanosine; 8MGuo) are effective sources of such T cell-like help. Addition of T cell-derived lymphokines to antigen-activated B cells together with 8MGuo results in synergistic B cell differentiation, amplifying the sum of the individual responses twofold to four-fold. Lymphokine activity is required at initiation of culture for optimal synergy with 8MGuo, whereas the nucleoside can be added up to 48 hr after the lymphokines with full synergy. 8MGuo provides a perceived T cell-like differentiation signal to B cells from immunodeficient xid mice, thereby distinguishing a subset of Lyb-5- nucleoside-responsive B cells from those activated by soluble anti-mu followed by B cell stimulatory factor-1, interleukin 1, and B cell differentiation factors, which are Lyb-5+. Moreover, at least a subset of the B cells recruited by the synergistic interaction of lymphokines and nucleoside is distinct from that responsive to 8MGuo + antigen, insofar as Sephadex G-10 nonadherent xid B cells fail to respond to either 8MGuo or lymphokines alone, but do respond to the combination. A distinct subpopulation can also be demonstrated among normal B cells by limiting dilution analysis in which the precursor frequency of antigen-reactive B cells in the presence of lymphokines or nucleoside alone increases substantially when both agents are present together. In concert with the kinetic data, these observations suggest that synergy derives at least in part from the ability of lymphokines to induce one or more elements the absence of which limits the capacity of a distinct B cell subpopulation to respond to 8MGuo.
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