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Zhao G, Chang Z, Zhao Y, Guo Y, Lu H, Liang W, Rom O, Wang H, Sun J, Zhu T, Fan Y, Chang L, Yang B, Garcia-Barrio MT, Chen YE, Zhang J. KLF11 protects against abdominal aortic aneurysm through inhibition of endothelial cell dysfunction. JCI Insight 2021; 6:141673. [PMID: 33507881 PMCID: PMC8021107 DOI: 10.1172/jci.insight.141673] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 01/27/2021] [Indexed: 12/13/2022] Open
Abstract
Abdominal aortic aneurysm (AAA) is a life-threatening degenerative vascular disease. Endothelial cell (EC) dysfunction is implicated in AAA. Our group recently demonstrated that Krüppel-like factor 11 (KLF11) plays an essential role in maintaining vascular homeostasis, at least partially through inhibition of EC inflammatory activation. However, the functions of endothelial KLF11 in AAA remain unknown. Here we found that endothelial KLF11 expression was reduced in the ECs from human aneurysms and was time dependently decreased in the aneurysmal endothelium from both elastase- and Pcsk9/AngII-induced AAA mouse models. KLF11 deficiency in ECs markedly aggravated AAA formation, whereas EC-selective KLF11 overexpression markedly inhibited AAA formation. Mechanistically, KLF11 not only inhibited the EC inflammatory response but also diminished MMP9 expression and activity and reduced NADPH oxidase 2-mediated production of reactive oxygen species in ECs. In addition, KLF11-deficient ECs induced smooth muscle cell dedifferentiation and apoptosis. Overall, we established endothelial KLF11 as a potentially novel factor protecting against AAA and a potential target for intervention in aortic aneurysms.
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Affiliation(s)
- Guizhen Zhao
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, USA
| | - Ziyi Chang
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, USA
- Department of Pathology, China-Japan Friendship Hospital, Beijing, China
| | - Yang Zhao
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, USA
| | - Yanhong Guo
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, USA
| | - Haocheng Lu
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, USA
| | - Wenying Liang
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, USA
| | - Oren Rom
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, USA
| | - Huilun Wang
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, USA
| | - Jinjian Sun
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, USA
- Department of Cardiovascular Medicine, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Tianqing Zhu
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, USA
| | - Yanbo Fan
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, USA
- Department of Cancer Biology, College of Medicine, University of Cincinnati, Cincinnati, Ohio. USA
| | - Lin Chang
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, USA
| | - Bo Yang
- Department of Cardiac Surgery, University of Michigan Medical Center, Ann Arbor, Michigan, USA
| | - Minerva T. Garcia-Barrio
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, USA
| | - Y. Eugene Chen
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, USA
- Department of Cardiac Surgery, University of Michigan Medical Center, Ann Arbor, Michigan, USA
| | - Jifeng Zhang
- Department of Internal Medicine, University of Michigan Medical Center, Ann Arbor, Michigan, USA
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2
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Koenen RR, Binder CJ. Platelets and coagulation factors: Established and novel roles in atherosclerosis and atherothrombosis. Atherosclerosis 2020; 307:78-79. [PMID: 32718764 DOI: 10.1016/j.atherosclerosis.2020.07.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Rory R Koenen
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands.
| | - Christoph J Binder
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria.
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3
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Grover SP, Mackman N. Tissue factor in atherosclerosis and atherothrombosis. Atherosclerosis 2020; 307:80-86. [PMID: 32674807 DOI: 10.1016/j.atherosclerosis.2020.06.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 05/27/2020] [Accepted: 06/03/2020] [Indexed: 12/17/2022]
Abstract
Atherosclerosis is a chronic inflammatory disease that is characterized by the formation of lipid rich plaques in the wall of medium to large sized arteries. Atherothrombosis represents the terminal manifestation of this pathology in which atherosclerotic plaque rupture or erosion triggers the formation of occlusive thrombi. Occlusion of arteries and resultant tissue ischemia in the heart and brain causes myocardial infarction and stroke, respectively. Tissue factor (TF) is the receptor for the coagulation protease factor VIIa, and formation of the TF:factor VIIa complex triggers blood coagulation. TF is expressed at high levels in atherosclerotic plaques by both macrophage-derived foam cells and vascular smooth muscle cells, as well as extracellular vesicles derived from these cells. Importantly, TF mediated activation of coagulation is critically important for arterial thrombosis in the setting of atherosclerotic disease. The major endogenous inhibitor of the TF:factor VIIa complex is TF pathway inhibitor 1 (TFPI-1), which is also present in atherosclerotic plaques. In mouse models, increased or decreased expression of TFPI-1 has been found to alter atherosclerosis. This review highlights the contribution of TF-dependent activation of coagulation to atherthrombotic disease.
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Affiliation(s)
- Steven P Grover
- UNC Blood Research Center, Division of Hematology and Oncology, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Nigel Mackman
- UNC Blood Research Center, Division of Hematology and Oncology, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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4
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Lordan R, Tsoupras A, Zabetakis I. Platelet activation and prothrombotic mediators at the nexus of inflammation and atherosclerosis: Potential role of antiplatelet agents. Blood Rev 2020; 45:100694. [PMID: 32340775 DOI: 10.1016/j.blre.2020.100694] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 03/22/2020] [Accepted: 04/07/2020] [Indexed: 12/20/2022]
Abstract
Platelets are central to inflammation-related manifestations of cardiovascular diseases (CVD) such as atherosclerosis. Platelet-activating factor (PAF), thrombin, thromboxane A2 (TxA2), and adenosine diphosphate (ADP) are some of the key agonists of platelet activation that are at the intersection between a plethora of inflammatory pathways that modulate pro-inflammatory and coagulation processes. The aim of this article is to review the role of platelets and the relationship between their structure, function, and the interactions of their constituents in systemic inflammation and atherosclerosis. Antiplatelet therapies are discussed with a view to primary prevention of CVD by the clinical reduction of platelet reactivity and inflammation. Current antiplatelet therapies are effective in reducing cardiovascular risk but increase bleeding risk. Novel therapeutic antiplatelet approaches beyond current pharmacological modalities that do not increase the risk of bleeding require further investigation. There is potential for specifically designed nutraceuticals that may become safer alternatives to pharmacological antiplatelet agents for the primary prevention of CVD but there is serious concern over their efficacy and regulation, which requires considerably more research.
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Affiliation(s)
- Ronan Lordan
- Department of Biological Sciences, University of Limerick, Limerick, Ireland; Health Research Institute (HRI), University of Limerick, Limerick, Ireland; Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104-5158, USA.
| | - Alexandros Tsoupras
- Department of Biological Sciences, University of Limerick, Limerick, Ireland; Health Research Institute (HRI), University of Limerick, Limerick, Ireland
| | - Ioannis Zabetakis
- Department of Biological Sciences, University of Limerick, Limerick, Ireland; Health Research Institute (HRI), University of Limerick, Limerick, Ireland
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5
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Liang W, Fan Y, Lu H, Chang Z, Hu W, Sun J, Wang H, Zhu T, Wang J, Adili R, Garcia-Barrio MT, Holinstat M, Eitzman D, Zhang J, Chen YE. KLF11 (Krüppel-Like Factor 11) Inhibits Arterial Thrombosis via Suppression of Tissue Factor in the Vascular Wall. Arterioscler Thromb Vasc Biol 2020; 39:402-412. [PMID: 30602303 DOI: 10.1161/atvbaha.118.311612] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Objective- Mutations in Krüppel like factor-11 ( KLF11), a gene also known as maturity-onset diabetes mellitus of the young type 7, contribute to the development of diabetes mellitus. KLF11 has anti-inflammatory effects in endothelial cells and beneficial effects on stroke. However, the function of KLF11 in the cardiovascular system is not fully unraveled. In this study, we investigated the role of KLF11 in vascular smooth muscle cell biology and arterial thrombosis. Approach and Results- Using a ferric chloride-induced thrombosis model, we found that the occlusion time was significantly reduced in conventional Klf11 knockout mice, whereas bone marrow transplantation could not rescue this phenotype, suggesting that vascular KLF11 is critical for inhibition of arterial thrombosis. We further demonstrated that vascular smooth muscle cell-specific Klf11 knockout mice also exhibited significantly reduced occlusion time. The expression of tissue factor (encoded by the F3 gene), a main initiator of the coagulation cascade, was increased in the artery of Klf11 knockout mice, as determined by real-time quantitative polymerase chain reaction and immunofluorescence. Furthermore, vascular smooth muscle cells isolated from Klf11 knockout mouse aortas showed increased tissue factor expression, which was rescued by KLF11 overexpression. In human aortic smooth muscle cells, small interfering RNA-mediated knockdown of KLF11 increased tissue factor expression. Consistent results were observed on adenovirus-mediated overexpression of KLF11. Mechanistically, KLF11 downregulates F3 at the transcriptional level as determined by reporter and chromatin immunoprecipitation assays. Conclusions- Our data demonstrate that KLF11 is a novel transcriptional suppressor of F3 in vascular smooth muscle cells, constituting a potential molecular target for inhibition of arterial thrombosis.
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Affiliation(s)
- Wenying Liang
- From the Department of Internal Medicine, Cardiovascular Center, University of Michigan Medical Center, Ann Arbor (W.L., Y.F., H.L., Z.C., W.H., J.S., H.W., T.Z., J.W., M.T.G.-B., D.E., J.Z., Y.E.C.)
| | - Yanbo Fan
- From the Department of Internal Medicine, Cardiovascular Center, University of Michigan Medical Center, Ann Arbor (W.L., Y.F., H.L., Z.C., W.H., J.S., H.W., T.Z., J.W., M.T.G.-B., D.E., J.Z., Y.E.C.)
| | - Haocheng Lu
- From the Department of Internal Medicine, Cardiovascular Center, University of Michigan Medical Center, Ann Arbor (W.L., Y.F., H.L., Z.C., W.H., J.S., H.W., T.Z., J.W., M.T.G.-B., D.E., J.Z., Y.E.C.)
| | - Ziyi Chang
- From the Department of Internal Medicine, Cardiovascular Center, University of Michigan Medical Center, Ann Arbor (W.L., Y.F., H.L., Z.C., W.H., J.S., H.W., T.Z., J.W., M.T.G.-B., D.E., J.Z., Y.E.C.)
| | - Wenting Hu
- From the Department of Internal Medicine, Cardiovascular Center, University of Michigan Medical Center, Ann Arbor (W.L., Y.F., H.L., Z.C., W.H., J.S., H.W., T.Z., J.W., M.T.G.-B., D.E., J.Z., Y.E.C.)
| | - Jinjian Sun
- From the Department of Internal Medicine, Cardiovascular Center, University of Michigan Medical Center, Ann Arbor (W.L., Y.F., H.L., Z.C., W.H., J.S., H.W., T.Z., J.W., M.T.G.-B., D.E., J.Z., Y.E.C.)
| | - Huilun Wang
- From the Department of Internal Medicine, Cardiovascular Center, University of Michigan Medical Center, Ann Arbor (W.L., Y.F., H.L., Z.C., W.H., J.S., H.W., T.Z., J.W., M.T.G.-B., D.E., J.Z., Y.E.C.)
| | - Tianqing Zhu
- From the Department of Internal Medicine, Cardiovascular Center, University of Michigan Medical Center, Ann Arbor (W.L., Y.F., H.L., Z.C., W.H., J.S., H.W., T.Z., J.W., M.T.G.-B., D.E., J.Z., Y.E.C.)
| | - Jintao Wang
- From the Department of Internal Medicine, Cardiovascular Center, University of Michigan Medical Center, Ann Arbor (W.L., Y.F., H.L., Z.C., W.H., J.S., H.W., T.Z., J.W., M.T.G.-B., D.E., J.Z., Y.E.C.)
| | - Reheman Adili
- Department of Pharmacology, University of Michigan, Ann Arbor (R.A., M.H.)
| | - Minerva T Garcia-Barrio
- From the Department of Internal Medicine, Cardiovascular Center, University of Michigan Medical Center, Ann Arbor (W.L., Y.F., H.L., Z.C., W.H., J.S., H.W., T.Z., J.W., M.T.G.-B., D.E., J.Z., Y.E.C.)
| | - Michael Holinstat
- Department of Pharmacology, University of Michigan, Ann Arbor (R.A., M.H.)
| | - Daniel Eitzman
- From the Department of Internal Medicine, Cardiovascular Center, University of Michigan Medical Center, Ann Arbor (W.L., Y.F., H.L., Z.C., W.H., J.S., H.W., T.Z., J.W., M.T.G.-B., D.E., J.Z., Y.E.C.)
| | - Jifeng Zhang
- From the Department of Internal Medicine, Cardiovascular Center, University of Michigan Medical Center, Ann Arbor (W.L., Y.F., H.L., Z.C., W.H., J.S., H.W., T.Z., J.W., M.T.G.-B., D.E., J.Z., Y.E.C.)
| | - Y Eugene Chen
- From the Department of Internal Medicine, Cardiovascular Center, University of Michigan Medical Center, Ann Arbor (W.L., Y.F., H.L., Z.C., W.H., J.S., H.W., T.Z., J.W., M.T.G.-B., D.E., J.Z., Y.E.C.)
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6
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Posma JJ, Grover SP, Hisada Y, Owens AP, Antoniak S, Spronk HM, Mackman N. Roles of Coagulation Proteases and PARs (Protease-Activated Receptors) in Mouse Models of Inflammatory Diseases. Arterioscler Thromb Vasc Biol 2019; 39:13-24. [PMID: 30580574 DOI: 10.1161/atvbaha.118.311655] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Activation of the blood coagulation cascade leads to fibrin deposition and platelet activation that are required for hemostasis. However, aberrant activation of coagulation can lead to thrombosis. Thrombi can cause tissue ischemia, and fibrin degradation products and activated platelets can enhance inflammation. In addition, coagulation proteases activate cells by cleavage of PARs (protease-activated receptors), including PAR1 and PAR2. Direct oral anticoagulants have recently been developed to specifically inhibit the coagulation proteases FXa (factor Xa) and thrombin. Administration of these inhibitors to wild-type mice can be used to determine the roles of FXa and thrombin in different inflammatory diseases. These results can be compared with the phenotypes of mice with deficiencies of either Par1 (F2r) or Par2 (F2rl1). However, inhibition of coagulation proteases will have effects beyond reducing PAR signaling, and a deficiency of PARs will abolish signaling from all proteases that activate these receptors. We will summarize studies that examine the roles of coagulation proteases, particularly FXa and thrombin, and PARs in different mouse models of inflammatory disease. Targeting FXa and thrombin or PARs may reduce inflammatory diseases in humans.
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Affiliation(s)
- Jens J Posma
- From the Laboratory for Clinical Thrombosis and Hemostasis, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, The Netherlands (J.J.P., H.M.S.).,Department of Internal Medicine, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, The Netherlands (J.J.P., H.M.S.).,Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, The Netherlands (J.J.P., H.M.S.)
| | - Steven P Grover
- Thrombosis and Hemostasis Program, Division of Hematology and Oncology, Department of Medicine, University of North Carolina, Chapel Hill (S.P.G., Y.H., N.M.)
| | - Yohei Hisada
- Thrombosis and Hemostasis Program, Division of Hematology and Oncology, Department of Medicine, University of North Carolina, Chapel Hill (S.P.G., Y.H., N.M.)
| | - A Phillip Owens
- Division of Cardiovascular Health and Disease, University of Cincinnati College of Medicine, OH (A.P.O.)
| | - Silvio Antoniak
- Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill (S.A.)
| | - Henri M Spronk
- From the Laboratory for Clinical Thrombosis and Hemostasis, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, The Netherlands (J.J.P., H.M.S.).,Department of Internal Medicine, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, The Netherlands (J.J.P., H.M.S.).,Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, The Netherlands (J.J.P., H.M.S.)
| | - Nigel Mackman
- Thrombosis and Hemostasis Program, Division of Hematology and Oncology, Department of Medicine, University of North Carolina, Chapel Hill (S.P.G., Y.H., N.M.)
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7
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Kremers BMM, Ten Cate H, Spronk HMH. Pleiotropic effects of the hemostatic system. J Thromb Haemost 2018; 16:S1538-7836(22)02208-5. [PMID: 29851288 DOI: 10.1111/jth.14161] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Indexed: 01/19/2023]
Abstract
Atherothrombosis is characterized by the inflammatory process of atherosclerosis combined with a hypercoagulable state leading to superimposed thrombus formation. In atherosclerotic plaques, cell signaling can occur via protease-activated receptors (PARs), four of which have been identified so far (PAR1-PAR4). Proteases that are able to activate PARs can be produced systemically, but also at the sites of lesions, and they include thrombin and activated factor X. After PAR activation, downstream signaling can lead to both proinflammatory effects and a hypercoagulable state. Which specific effect occurs depends on the type of protease and activated PAR, and the site of activation. Hypercoagulable effects are mainly exerted through PAR1 and PAR4, whereas proinflammatory responses are mostly seen after PAR1 and PAR2 activation. PAR signaling pathways contribute to atherothrombosis, suggesting that inhibition of these pathways possibly prevents cardiovascular events based on this pathophysiological mechanism. In this review, we highlight the pathways by which PAR activation leads to proinflammatory responses and a hypercoagulable state. Furthermore, we give an overview of potential pharmacological treatment targets that promote vascular protection.
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Affiliation(s)
- B M M Kremers
- Departments of Internal Medicine and Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
| | - H Ten Cate
- Departments of Internal Medicine and Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
| | - H M H Spronk
- Departments of Internal Medicine and Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, the Netherlands
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8
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Jones SM, Mann A, Conrad K, Saum K, Hall DE, McKinney LM, Robbins N, Thompson J, Peairs AD, Camerer E, Rayner KJ, Tranter M, Mackman N, Owens AP. PAR2 (Protease-Activated Receptor 2) Deficiency Attenuates Atherosclerosis in Mice. Arterioscler Thromb Vasc Biol 2018; 38:1271-1282. [PMID: 29599135 DOI: 10.1161/atvbaha.117.310082] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 03/15/2018] [Indexed: 12/25/2022]
Abstract
OBJECTIVE PAR2 (protease-activated receptor 2)-dependent signaling results in augmented inflammation and has been implicated in the pathogenesis of several autoimmune conditions. The objective of this study was to determine the effect of PAR2 deficiency on the development of atherosclerosis. APPROACH AND RESULTS PAR2 mRNA and protein expression is increased in human carotid artery and mouse aortic arch atheroma versus control carotid and aortic arch arteries, respectively. To determine the effect of PAR2 deficiency on atherosclerosis, male and female low-density lipoprotein receptor-deficient (Ldlr-/-) mice (8-12 weeks old) that were Par2+/+ or Par2-/- were fed a fat- and cholesterol-enriched diet for 12 or 24 weeks. PAR2 deficiency attenuated atherosclerosis in the aortic sinus and aortic root after 12 and 24 weeks. PAR2 deficiency did not alter total plasma cholesterol concentrations or lipoprotein distributions. Bone marrow transplantation showed that PAR2 on nonhematopoietic cells contributed to atherosclerosis. PAR2 deficiency significantly attenuated levels of the chemokines Ccl2 and Cxcl1 in the circulation and macrophage content in atherosclerotic lesions. Mechanistic studies using isolated primary vascular smooth muscle cells showed that PAR2 deficiency is associated with reduced Ccl2 and Cxcl1 mRNA expression and protein release into the supernatant resulting in less monocyte migration. CONCLUSIONS Our results indicate that PAR2 deficiency is associated with attenuation of atherosclerosis and may reduce lesion progression by blunting Ccl2- and Cxcl1-induced monocyte infiltration.
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Affiliation(s)
- Shannon M Jones
- From the Division of Cardiovascular Health and Disease (S.M.J., A.M., K.C., K.S., L.M.M., N.R., M.T., A.P.O.)
| | - Adrien Mann
- From the Division of Cardiovascular Health and Disease (S.M.J., A.M., K.C., K.S., L.M.M., N.R., M.T., A.P.O.)
| | - Kelsey Conrad
- From the Division of Cardiovascular Health and Disease (S.M.J., A.M., K.C., K.S., L.M.M., N.R., M.T., A.P.O.).,Pathobiology and Molecular Medicine Program (K.C., M.T., A.P.O.)
| | - Keith Saum
- From the Division of Cardiovascular Health and Disease (S.M.J., A.M., K.C., K.S., L.M.M., N.R., M.T., A.P.O.).,University of Cincinnati Medical Scientist Training Program (K.S.)
| | - David E Hall
- Department of Nutritional Sciences, College of Allied Health (D.E.H., A.D.P.).,Department of Internal Medicine (D.E.H., A.D.P.), University of Cincinnati College of Medicine, OH
| | - Lisa M McKinney
- From the Division of Cardiovascular Health and Disease (S.M.J., A.M., K.C., K.S., L.M.M., N.R., M.T., A.P.O.)
| | - Nathan Robbins
- From the Division of Cardiovascular Health and Disease (S.M.J., A.M., K.C., K.S., L.M.M., N.R., M.T., A.P.O.)
| | - Joel Thompson
- Division of Endocrinology and Molecular Medicine, Department of Internal Medicine, University of Kentucky, Lexington (J.T.)
| | - Abigail D Peairs
- Department of Nutritional Sciences, College of Allied Health (D.E.H., A.D.P.).,Department of Internal Medicine (D.E.H., A.D.P.), University of Cincinnati College of Medicine, OH
| | - Eric Camerer
- INSERM U970, Paris Cardiovascular Research Centre, France (E.C.)
| | - Katey J Rayner
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa Heart Institute, Ontario, Canada (K.J.R.)
| | - Michael Tranter
- From the Division of Cardiovascular Health and Disease (S.M.J., A.M., K.C., K.S., L.M.M., N.R., M.T., A.P.O.).,Pathobiology and Molecular Medicine Program (K.C., M.T., A.P.O.)
| | - Nigel Mackman
- Division of Hematology and Oncology, Department of Medicine, UNC McAllister Heart Institute, University of North Carolina at Chapel Hill (N.M.)
| | - A Phillip Owens
- From the Division of Cardiovascular Health and Disease (S.M.J., A.M., K.C., K.S., L.M.M., N.R., M.T., A.P.O.) .,Pathobiology and Molecular Medicine Program (K.C., M.T., A.P.O.)
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9
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Fazavana JG, Muczynski V, Proulle V, Wohner N, Christophe OD, Lenting PJ, Denis CV. LDL receptor-related protein 1 contributes to the clearance of the activated factor VII-antithrombin complex. J Thromb Haemost 2016; 14:2458-2470. [PMID: 27614059 DOI: 10.1111/jth.13502] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 08/30/2016] [Indexed: 11/30/2022]
Abstract
Essentials Factor VIIa is cleared principally as a complex with antithrombin. Enzyme/serpin complexes are preferred ligands for the scavenger-receptor LRP1. Factor VIIa/antithrombin but not factor VIIa alone is a ligand for LRP1. Macrophage-expressed LRP1 contributes to the clearance of factor VIIa/antithrombin. SUMMARY Background Recent findings point to activated factor VII (FVIIa) being cleared predominantly (± 65% of the injected protein) as part of a complex with the serpin antithrombin. FVIIa-antithrombin complexes are targeted to hepatocytes and liver macrophages. Both cells lines abundantly express LDL receptor-related protein 1 (LRP1), a scavenger receptor mediating the clearance of protease-serpin complexes. Objectives To investigate whether FVIIa-antithrombin is a ligand for LRP1. Methods Binding of FVIIa and pre-formed FVIIa-antithrombin to purified LRP1 Fc-tagged cluster IV (rLRP1-cIV/Fc) and to human and murine macrophages was analyzed. FVIIa clearance was determined in macrophage LRP1 (macLRP1)-deficient mice. Results Solid-phase binding assays showed that FVIIa-antithrombin bound in a specific, dose-dependent and saturable manner to rLRP1-cIV/Fc. Competition experiments with human THP1 macrophages indicated that binding of FVIIa but not of FVIIa-antithrombin was reduced in the presence of annexin-V or anti-tissue factor antibodies, whereas binding of FVIIa-antithrombin but not FVIIa was inhibited by the LRP1-antagonist GST-RAP. Additional experiments revealed binding of both FVIIa and FVIIa-antithrombin to murine control macrophages. In contrast, no binding of FVIIa-antithrombin to macrophages derived from macLRP1-deficient mice could be detected. Clearance of FVIIa-antithrombin but not of active site-blocked FVIIa was delayed 1.5-fold (mean residence time of 3.3 ± 0.1 h versus 2.4 ± 0.2 h) in macLRP1-deficient mice. The circulatory presence of FVIIa was prolonged to a similar extent in macLRP1-deficient mice and in control mice. Conclusions Our data show that FVIIa-antithrombin but not FVIIa is a ligand for LRP1, and that LRP1 contributes to the clearance of FVIIa-antithrombin in vivo.
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Affiliation(s)
- J G Fazavana
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Universitaires Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
| | - V Muczynski
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Universitaires Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
| | - V Proulle
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Universitaires Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
- Department of Biological Hematology, CHU Bicetre, Hôpitaux Universitaires Paris Sud, AP-HP, Paris, France
| | - N Wohner
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Universitaires Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
| | - O D Christophe
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Universitaires Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
| | - P J Lenting
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Universitaires Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
| | - C V Denis
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Universitaires Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
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10
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Xiao J, Jin K, Wang J, Ma J, Zhang J, Jiang N, Wang H, Luo X, Fei J, Wang Z, Yang X, Ma D. Conditional knockout of TFPI-1 in VSMCs of mice accelerates atherosclerosis by enhancing AMOT/YAP pathway. Int J Cardiol 2016; 228:605-614. [PMID: 27875740 DOI: 10.1016/j.ijcard.2016.11.195] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 11/06/2016] [Indexed: 12/13/2022]
Abstract
BACKGROUND Tissue factor pathway inhibitor-1 (TFPI-1) has multiple functions and its precise role and molecular mechanism during the development of atherosclerosis are not clear. OBJECTIVES To determine the effect and molecular mechanism of TFPI-1 deficiency in vascular smooth muscle cells (VSMCs) in atherosclerosis in the apolipoprotein E knockout (ApoE-/-) mouse. METHODS AND RESULTS A mouse model with a conditional knockout of TFPI-1 in VSMCs in an atherosclerosis-prone background (ApoE-/-) was generated. Mice were fed a high fat diet for 18weeks and were then euthanized. Arterial trees and aortas were stained with Sudan IV and were labeled via immunohistochemistry. Cell proliferation and migration of VSMCs in atherosclerotic plaques were assessed. More atherosclerotic lesions and higher levels of proliferation and migration of VSMCs were observed in TFPI-1fl/fl/Sma-Cre+ApoE-/-mice. An interaction between TFPI-1 and angiomotin (AMOT) was identified in human VSMCs by mass spectrometry, immunoprecipitation and co-localization analyses. Signal pathway changes were detected by Western blot analysis, and the expression levels of target genes were determined by real-time PCR. Decreased phosphorylation of AMOT and Yes-associated protein 1 (YAP) in TFPI-1fl/fl/Sma-Cre+ApoE-/- mice resulted in increased expression levels of snail family zinc finger 2 (SLUG) and connective tissue growth factor (CTGF), which are target genes of the Hippo signaling pathway that have been verified as atherosclerosis candidate genes. CONCLUSION Deficiency in TFPI-1 in the VSMCs of ApoE-/- mice accelerated the development of atherosclerosis by promoting the proliferation and migration of VSMCs which may be caused by the decreased phosphorylation of AMOT and YAP. SIGNIFICANCE TFPI-1 has been found to has an anticoagulant activity, induce cell apoptosis and prevent cell proliferation. For the first time, we constructed a line of conditional knockout mice in which the TPFI-1 gene is deleted in VSMCs. We found that TFPI-1 deficiency clearly promoted the development of atherosclerosis when these mice were crossed into an ApoE-/-background. One notable feature of atherosclerosis is the proliferation and migration of smooth muscle cells. Previous reports involved TFPI-1 do not completely explain the proliferation and migration of VSMCs because heterozygous TF deficient (TF±) mice bred in an ApoE-/- background did not show diminished atherosclerosis compared to TF+/+ mice bred in the same background. Our results first confirmed that TFPI-1 interacts with AMOT, which led to a decrease in the phosphorylation of YAP and further increased the genes expression of the proliferation and migration involved. Our results further confirmed that atherosclerosis was a localized disease.
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Affiliation(s)
- Jiajun Xiao
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Collaborative Innovation Center of Genetics and Development, Department of Biochemistry and Molecular Biology, Institute of Biomedical Sciences, School of Basic Medical Sciences, Fudan University, Shanghai 20032, China
| | - Kaiyue Jin
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Collaborative Innovation Center of Genetics and Development, Department of Biochemistry and Molecular Biology, Institute of Biomedical Sciences, School of Basic Medical Sciences, Fudan University, Shanghai 20032, China
| | - Jiping Wang
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Collaborative Innovation Center of Genetics and Development, Department of Biochemistry and Molecular Biology, Institute of Biomedical Sciences, School of Basic Medical Sciences, Fudan University, Shanghai 20032, China
| | - Jing Ma
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Collaborative Innovation Center of Genetics and Development, Department of Biochemistry and Molecular Biology, Institute of Biomedical Sciences, School of Basic Medical Sciences, Fudan University, Shanghai 20032, China
| | - Jin Zhang
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Collaborative Innovation Center of Genetics and Development, Department of Biochemistry and Molecular Biology, Institute of Biomedical Sciences, School of Basic Medical Sciences, Fudan University, Shanghai 20032, China
| | - Nan Jiang
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Collaborative Innovation Center of Genetics and Development, Department of Biochemistry and Molecular Biology, Institute of Biomedical Sciences, School of Basic Medical Sciences, Fudan University, Shanghai 20032, China
| | - Huijun Wang
- Cardiovascular Center, Children's Hospital Affiliated to Fudan University, Shanghai 200032, China
| | - Xinping Luo
- Department of Cardiovascular Medicine, Huashan Hospital Affiliated to Fudan University, Shanghai 200032, China
| | - Jian Fei
- Shanghai Research Centre for Model Organisms, Shanghai 201203,China
| | - Zhugang Wang
- Shanghai Research Centre for Model Organisms, Shanghai 201203,China
| | - Xiao Yang
- Institute of Geriatrics, PLA Postgraduate School of Medicine, PLA General Hospital, Beijing 100853, China
| | - Duan Ma
- Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Collaborative Innovation Center of Genetics and Development, Department of Biochemistry and Molecular Biology, Institute of Biomedical Sciences, School of Basic Medical Sciences, Fudan University, Shanghai 20032, China; Cardiovascular Center, Children's Hospital Affiliated to Fudan University, Shanghai 200032, China.
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11
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Shnerb Ganor R, Harats D, Schiby G, Gailani D, Levkovitz H, Avivi C, Tamarin I, Shaish A, Salomon O. Factor XI Deficiency Protects Against Atherogenesis in Apolipoprotein E/Factor XI Double Knockout Mice. Arterioscler Thromb Vasc Biol 2016; 36:475-81. [PMID: 26800563 DOI: 10.1161/atvbaha.115.306954] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Accepted: 12/22/2015] [Indexed: 01/30/2023]
Abstract
OBJECTIVE Atherosclerosis and atherothrombosis are still major causes of mortality in the Western world, even after the widespread use of cholesterol-lowering medications. Recently, an association between local thrombin generation and atherosclerotic burden has been reported. Here, we studied the role of factor XI (FXI) deficiency in the process of atherosclerosis in mice. APPROACH AND RESULTS Apolipoprotein E/FXI double knockout mice, created for the first time in our laboratory. There was no difference in cholesterol levels or lipoprotein profiles between apolipoprotein E knockout and double knockout mice. Nevertheless, in 24-week-old double knockout mice, the atherosclerotic lesion area in the aortic sinus was reduced by 32% (P=0.004) in comparison with apolipoprotein E knockout mice. In 42-week-old double knockout mice, FXI deficiency inhibited atherosclerosis progression significantly in the aortic sinus (25% reduction, P=0.024) and in the aortic arch (49% reduction, P=0.028), with a prominent reduction of macrophage infiltration in the atherosclerotic lesions. CONCLUSIONS FXI deprivation was shown to slow down atherogenesis in mice. The results suggest that the development of atherosclerosis can be prevented by targeting FXI.
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Affiliation(s)
- Reut Shnerb Ganor
- From the The Bert W. Strassburger Lipid Center (R.S.G., D.H., H.L., A.S.) and Department of Pathology (G.S., C.A.), and Thrombosis Unit (R.S.G., I.T., O.S.), Sheba Medical Center, Tel-Hashomer, Israel; Sackler Faculty of Medicine (R.S.G., D.H., G.S., H.L., C.A., I.T., O.S.), Tel-Aviv University, Tel-Aviv, Israel; and Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, TN (D.G.)
| | - Dror Harats
- From the The Bert W. Strassburger Lipid Center (R.S.G., D.H., H.L., A.S.) and Department of Pathology (G.S., C.A.), and Thrombosis Unit (R.S.G., I.T., O.S.), Sheba Medical Center, Tel-Hashomer, Israel; Sackler Faculty of Medicine (R.S.G., D.H., G.S., H.L., C.A., I.T., O.S.), Tel-Aviv University, Tel-Aviv, Israel; and Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, TN (D.G.)
| | - Ginette Schiby
- From the The Bert W. Strassburger Lipid Center (R.S.G., D.H., H.L., A.S.) and Department of Pathology (G.S., C.A.), and Thrombosis Unit (R.S.G., I.T., O.S.), Sheba Medical Center, Tel-Hashomer, Israel; Sackler Faculty of Medicine (R.S.G., D.H., G.S., H.L., C.A., I.T., O.S.), Tel-Aviv University, Tel-Aviv, Israel; and Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, TN (D.G.)
| | - David Gailani
- From the The Bert W. Strassburger Lipid Center (R.S.G., D.H., H.L., A.S.) and Department of Pathology (G.S., C.A.), and Thrombosis Unit (R.S.G., I.T., O.S.), Sheba Medical Center, Tel-Hashomer, Israel; Sackler Faculty of Medicine (R.S.G., D.H., G.S., H.L., C.A., I.T., O.S.), Tel-Aviv University, Tel-Aviv, Israel; and Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, TN (D.G.)
| | - Hanna Levkovitz
- From the The Bert W. Strassburger Lipid Center (R.S.G., D.H., H.L., A.S.) and Department of Pathology (G.S., C.A.), and Thrombosis Unit (R.S.G., I.T., O.S.), Sheba Medical Center, Tel-Hashomer, Israel; Sackler Faculty of Medicine (R.S.G., D.H., G.S., H.L., C.A., I.T., O.S.), Tel-Aviv University, Tel-Aviv, Israel; and Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, TN (D.G.)
| | - Camila Avivi
- From the The Bert W. Strassburger Lipid Center (R.S.G., D.H., H.L., A.S.) and Department of Pathology (G.S., C.A.), and Thrombosis Unit (R.S.G., I.T., O.S.), Sheba Medical Center, Tel-Hashomer, Israel; Sackler Faculty of Medicine (R.S.G., D.H., G.S., H.L., C.A., I.T., O.S.), Tel-Aviv University, Tel-Aviv, Israel; and Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, TN (D.G.)
| | - Ilia Tamarin
- From the The Bert W. Strassburger Lipid Center (R.S.G., D.H., H.L., A.S.) and Department of Pathology (G.S., C.A.), and Thrombosis Unit (R.S.G., I.T., O.S.), Sheba Medical Center, Tel-Hashomer, Israel; Sackler Faculty of Medicine (R.S.G., D.H., G.S., H.L., C.A., I.T., O.S.), Tel-Aviv University, Tel-Aviv, Israel; and Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, TN (D.G.)
| | - Aviv Shaish
- From the The Bert W. Strassburger Lipid Center (R.S.G., D.H., H.L., A.S.) and Department of Pathology (G.S., C.A.), and Thrombosis Unit (R.S.G., I.T., O.S.), Sheba Medical Center, Tel-Hashomer, Israel; Sackler Faculty of Medicine (R.S.G., D.H., G.S., H.L., C.A., I.T., O.S.), Tel-Aviv University, Tel-Aviv, Israel; and Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, TN (D.G.)
| | - Ophira Salomon
- From the The Bert W. Strassburger Lipid Center (R.S.G., D.H., H.L., A.S.) and Department of Pathology (G.S., C.A.), and Thrombosis Unit (R.S.G., I.T., O.S.), Sheba Medical Center, Tel-Hashomer, Israel; Sackler Faculty of Medicine (R.S.G., D.H., G.S., H.L., C.A., I.T., O.S.), Tel-Aviv University, Tel-Aviv, Israel; and Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, TN (D.G.).
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12
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Mastenbroek TG, van Geffen JP, Heemskerk JWM, Cosemans JMEM. Acute and persistent platelet and coagulant activities in atherothrombosis. J Thromb Haemost 2015; 13 Suppl 1:S272-80. [PMID: 26149036 DOI: 10.1111/jth.12972] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The potential relevance of murine atherothrombosis models for understanding human disease has been debated in the past. Despite this, in the last decade, many thrombosis studies with atherogenic Apoe(-/-) mice have been performed, which provide novel insight into the molecular mechanisms by which platelet and coagulation processes accomplish acute thrombus formation after plaque disruption in vivo. Support for these mechanisms has come from whole blood flow perfusion studies over plaque material in vitro, which are also reviewed in this study. The main plaque-derived triggers for thrombus formation appear to be collagen and tissue factor, next to bioactive mediators such as prostaglandin E2. The atherothrombotic process relies on collagen- and ADP-receptor-induced platelet activation as well as on thrombin/fibrin generation via the extrinsic and intrinsic coagulation pathways. Less is known of the persistent effects of a thrombus on atherosclerosis progression, but evidence suggests roles herein of activated platelets and ongoing thrombin generation.
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Affiliation(s)
- T G Mastenbroek
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
| | - J P van Geffen
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
| | - J W M Heemskerk
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
| | - J M E M Cosemans
- Department of Biochemistry, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, the Netherlands
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13
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Schurgers LJ, Spronk HMH. Differential cellular effects of old and new oral anticoagulants: consequences to the genesis and progression of atherosclerosis. Thromb Haemost 2014; 112:909-17. [PMID: 25298033 DOI: 10.1160/th14-03-0268] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Accepted: 09/16/2014] [Indexed: 01/06/2023]
Abstract
The main purpose of anticoagulants is to diminish fibrin formation, thereby decreasing the risk of venous or arterial thrombosis. Vitamin K antagonist have been used for many decades in order to achieve reduced thrombotic risk, despite major drawbacks of this class of drugs such as cumbersome dossing and monitoring of anticoagulant status. To overcome these drawbacks of VKA, new classes of anticoagulants have been developed including oral anticoagulants for direct inhibition of either thrombin or factor Xa, which can be administrated in a fixed dose without monitoring. Coagulation factors can activate cellular protease-activated receptors, thereby inducing cellular processes as inflammation, apoptosis, migration, and fibrosis. Therefore, inhibition of coagulation proteases not only attenuates fibrin formation, but may also influence pathophysiological processes like vascular calcification and atherosclerosis. Animal models revealed that VKA therapy induced both intima and media calcification and accelerated plaque vulnerability, whereas specific and direct inhibition of thrombin or factor Xa attenuated atherosclerosis. In this review we provide an overview of old and new oral anticoagulants, as well discuss potential pleiotropic effects with regard to calcification and atherosclerosis. Although translation from animal model to clinical patients seems difficult at first sight, effort should be made to fully understand the clinical implications of long-term oral anticoagulant therapy on vascular side effects.
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Affiliation(s)
- Leon J Schurgers
- Leon J. Schurgers, PhD, Department of Biochemistry, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands, Tel.: +31 433881681, Fax: +31 433884159, E-mail:
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14
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Giannarelli C, Alique M, Rodriguez DT, Yang DK, Jeong D, Calcagno C, Hutter R, Millon A, Kovacic JC, Weber T, Faries PL, Soff GA, Fayad ZA, Hajjar RJ, Fuster V, Badimon JJ. Alternatively spliced tissue factor promotes plaque angiogenesis through the activation of hypoxia-inducible factor-1α and vascular endothelial growth factor signaling. Circulation 2014; 130:1274-86. [PMID: 25116956 DOI: 10.1161/circulationaha.114.006614] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND Alternatively spliced tissue factor (asTF) is a novel isoform of full-length tissue factor, which exhibits angiogenic activity. Although asTF has been detected in human plaques, it is unknown whether its expression in atherosclerosis causes increased neovascularization and an advanced plaque phenotype. METHODS AND RESULTS Carotid (n=10) and coronary (n=8) specimens from patients with stable or unstable angina were classified as complicated or uncomplicated on the basis of plaque morphology. Analysis of asTF expression and cell type-specific expression revealed a strong expression and colocalization of asTF with macrophages and neovessels within complicated, but not uncomplicated, human plaques. Our results showed that the angiogenic activity of asTF is mediated via hypoxia-inducible factor-1α upregulation through integrins and activation of phosphatidylinositol-3-kinase/Akt and mitogen-activated protein kinase pathways. Hypoxia-inducible factor-1α upregulation by asTF also was associated with increased vascular endothelial growth factor expression in primary human endothelial cells, and vascular endothelial growth factor-Trap significantly reduced the angiogenic effect of asTF in vivo. Furthermore, asTF gene transfer significantly increased neointima formation and neovascularization after carotid wire injury in ApoE(-/-) mice. CONCLUSIONS The results of this study provide strong evidence that asTF promotes neointima formation and angiogenesis in an experimental model of accelerated atherosclerosis. Here, we demonstrate that the angiogenic effect of asTF is mediated via the activation of the hypoxia-inducible factor-1/vascular endothelial growth factor signaling. This mechanism may be relevant to neovascularization and the progression and associated complications of human atherosclerosis as suggested by the increased expression of asTF in complicated versus uncomplicated human carotid and coronary plaques.
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Affiliation(s)
- Chiara Giannarelli
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.).
| | - Matilde Alique
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.)
| | - David T Rodriguez
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.)
| | - Dong Kwon Yang
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.)
| | - Dongtak Jeong
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.)
| | - Claudia Calcagno
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.)
| | - Randolph Hutter
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.)
| | - Antoine Millon
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.)
| | - Jason C Kovacic
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.)
| | - Thomas Weber
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.)
| | - Peter L Faries
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.)
| | - Gerald A Soff
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.)
| | - Zahi A Fayad
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.)
| | - Roger J Hajjar
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.)
| | - Valentin Fuster
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.)
| | - Juan J Badimon
- From the AtheroThrombosis Research Unit (C.G., M.A., D.T.R., J.J.B.), Cardiovascular Research Institute (C.G., D.K.Y., D.J., J.C.K., T.W., R.J.H., V.F.), Translational and Molecular Imaging Institute (C.C., A.M., Z.A.F.), Department of Radiology (C.C., A.M., Z.A.F.), and Vascular Surgery (P.L.F.), Icahn School of Medicine at Mount Sinai, New York, NY; Memorial Sloan-Kettering, New York, NY (G.A.S.); and CNIC, Madrid, Spain (V.F.)
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Ünlü B, Versteeg HH. Effects of tumor-expressed coagulation factors on cancer progression and venous thrombosis: is there a key factor? Thromb Res 2014; 133 Suppl 2:S76-84. [DOI: 10.1016/s0049-3848(14)50013-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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16
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17
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Abstract
At least 468 individual genes have been manipulated by molecular methods to study their effects on the initiation, promotion, and progression of atherosclerosis. Most clinicians and many investigators, even in related disciplines, find many of these genes and the related pathways entirely foreign. Medical schools generally do not attempt to incorporate the relevant molecular biology into their curriculum. A number of key signaling pathways are highly relevant to atherogenesis and are presented to provide a context for the gene manipulations summarized herein. The pathways include the following: the insulin receptor (and other receptor tyrosine kinases); Ras and MAPK activation; TNF-α and related family members leading to activation of NF-κB; effects of reactive oxygen species (ROS) on signaling; endothelial adaptations to flow including G protein-coupled receptor (GPCR) and integrin-related signaling; activation of endothelial and other cells by modified lipoproteins; purinergic signaling; control of leukocyte adhesion to endothelium, migration, and further activation; foam cell formation; and macrophage and vascular smooth muscle cell signaling related to proliferation, efferocytosis, and apoptosis. This review is intended primarily as an introduction to these key signaling pathways. They have become the focus of modern atherosclerosis research and will undoubtedly provide a rich resource for future innovation toward intervention and prevention of the number one cause of death in the modern world.
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Affiliation(s)
- Paul N Hopkins
- Cardiovascular Genetics, Department of Internal Medicine, University of Utah, Salt Lake City, Utah, USA.
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18
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Winckers K, ten Cate H, Hackeng TM. The role of tissue factor pathway inhibitor in atherosclerosis and arterial thrombosis. Blood Rev 2013; 27:119-32. [PMID: 23631910 DOI: 10.1016/j.blre.2013.03.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Tissue factor pathway inhibitor (TFPI) is the main inhibitor of tissue factor (TF)-mediated coagulation. In atherosclerotic plaques TFPI co-localizes with TF, where it is believed to play an important role in attenuating TF activity. Findings in animal models such as TFPI knockout models and gene transfer models are consistent on the role of TFPI in arterial thrombosis as they reveal an active role for TFPI in attenuating arterial thrombus formation. In addition, ample experimental evidence exists indicating that TFPI has inhibitory effects on both smooth muscle cell migration and proliferation, both which are recognized as important pathological features in atherosclerosis development. Nonetheless, the clinical relevance of these antithrombotic and atheroprotective effects remains unclear. Paradoxically, the majority of clinical studies find increased instead of decreased TFPI antigen and activity levels in atherothrombotic disease, particularly in atherosclerosis and coronary artery disease (CAD). Increased TFPI levels in cardiovascular disease might result from complex interactions with established cardiovascular risk factors, such as hypercholesterolemia, diabetes and smoking. Moreover, it is postulated that increased TFPI levels reflect either the amount of endothelial perturbation and platelet activation, or a compensatory mechanism for the increased procoagulant state observed in cardiovascular disease. In all, the prognostic value of plasma TFPI in cardiovascular disease remains to be established. The current review focuses on TFPI in clinical studies of asymptomatic and symptomatic atherosclerosis, coronary artery disease and ischemic stroke, and discusses potential atheroprotective actions of TFPI.
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Affiliation(s)
- Kristien Winckers
- Department of Biochemistry, Cardiovascular Research Institute Maastricht, MUMC, Maastricht, The Netherlands
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19
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Abstract
Tissue factor (TF) is abundantly present in atherosclerotic plaques and it is the primary source of TF that triggers the rapid activation of the coagulation cascade after plaque rupture. While much of this TF is associated with monocyte/macrophages and vascular smooth muscle cells, recent studies suggests TF-positive microparticles (MPs) are the most abundant source in plaques. Further, while intravascular TF is largely absent in healthy patients, cardiovascular disease patients have increased TF expression in circulating monocytes, which can result in increased levels of TF-positive MPs. This brief review describes how TF is the primary initiator of atherothrombosis and how TF-positive MPs may serve as a biomarker to identify patients at greater risk of forming an occlusive thrombus. In addition, currently used therapeutics, such as statins and inhibitors of the renin angiotensin system, may have additional benefits by reducing TF expression and subsequent thrombosis.
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Affiliation(s)
- A Phillip Owens
- Department of Medicine, Division of Hematology and Oncology, McAllister Heart Institute, University of North Carolina at Chapel Hill, 98 Manning Drive Campus Box 7035, Chapel Hill, NC 27599, USA.
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20
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Hag AMF, Pedersen SF, Christoffersen C, Binderup T, Jensen MM, Jørgensen JT, Skovgaard D, Ripa RS, Kjaer A. (18)F-FDG PET imaging of murine atherosclerosis: association with gene expression of key molecular markers. PLoS One 2012; 7:e50908. [PMID: 23226424 PMCID: PMC3511408 DOI: 10.1371/journal.pone.0050908] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Accepted: 10/26/2012] [Indexed: 11/20/2022] Open
Abstract
Aim To study whether 18F-FDG can be used for in vivo imaging of atherogenesis by examining the correlation between 18F-FDG uptake and gene expression of key molecular markers of atherosclerosis in apoE−/− mice. Methods Nine groups of apoE−/− mice were given normal chow or high-fat diet. At different time-points, 18F-FDG PET/contrast-enhanced CT scans were performed on dedicated animal scanners. After scans, animals were euthanized, aortas removed, gamma counted, RNA extracted from the tissue, and gene expression of chemo (C-X-C motif) ligand 1 (CXCL-1), monocyte chemoattractant protein (MCP)-1, vascular cell adhesion molecule (VCAM)-1, cluster of differentiation molecule (CD)-68, osteopontin (OPN), lectin-like oxidized LDL-receptor (LOX)-1, hypoxia-inducible factor (HIF)-1α, HIF-2α, vascular endothelial growth factor A (VEGF), and tissue factor (TF) was measured by means of qPCR. Results The uptake of 18F-FDG increased over time in the groups of mice receiving high-fat diet measured by PET and ex vivo gamma counting. The gene expression of all examined markers of atherosclerosis correlated significantly with 18F-FDG uptake. The strongest correlation was seen with TF and CD68 (p<0.001). A multivariate analysis showed CD68, OPN, TF, and VCAM-1 to be the most important contributors to the uptake of 18F-FDG. Together they could explain 60% of the 18F-FDG uptake. Conclusion We have demonstrated that 18F-FDG can be used to follow the progression of atherosclerosis in apoE−/− mice. The gene expression of ten molecular markers representing different molecular processes important for atherosclerosis was shown to correlate with the uptake of 18F-FDG. Especially, the gene expressions of CD68, OPN, TF, and VCAM-1 were strong predictors for the uptake.
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Affiliation(s)
- Anne Mette Fisker Hag
- Cluster for Molecular Imaging, Faculty of Health and Medical Sciences and Department of Clinical Physiology, Nuclear Medicine & PET, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
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21
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Cardiac intercellular communication: are myocytes and fibroblasts fair-weather friends? J Cardiovasc Transl Res 2012; 5:768-82. [PMID: 23015462 DOI: 10.1007/s12265-012-9404-5] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2012] [Accepted: 08/20/2012] [Indexed: 10/27/2022]
Abstract
The cardiac fibroblast (CF) has historically been thought of as a quiescent cell of the heart, passively maintaining the extracellular environment for the cardiomyocytes (CM), the functional cardiac cell type. The increasingly appreciated role of the CF, however, extends well beyond matrix production, governing many aspects of cardiac function including cardiac electrophysiology and contractility. Importantly, its contributions to cardiac pathophysiology and pathologic remodeling have created a shift in the field's focus from the CM to the CF as a therapeutic target in the treatment of cardiac diseases. In response to cardiac injury, the CF undergoes a pathologic phenotypic transition into a myofibroblast, characterized by contractile smooth muscle proteins and upregulation of collagens, matrix proteins, and adhesion molecules. Further, the myofibroblast upregulates expression and secretion of a variety of pro-inflammatory, profibrotic mediators, including cytokines, chemokines, and growth factors. These mediators act in both an autocrine fashion to further activate CFs, as well as in a paracrine manner on both CMs and circulating inflammatory cells to induce myocyte dysfunction and chronic inflammation, respectively. Together, cell-specific cytokine-induced effects exacerbate pathologic remodeling and progression to HF. A better understanding of this dynamic intercellular communication will lead to novel targets for the attenuation of cardiac remodeling. Current strategies aimed at targeting cytokines have been largely unsuccessful in clinical trials, lending insights into ways that such intercellular cross talk can be more effectively attenuated. This review will summarize the current knowledge regarding CF functions in the heart and will discuss the regulation and signaling behind CF-mediated cytokine production and function. We will then highlight clinical trials that have exploited cytokine cross talk in the treatment of heart failure and provide novel strategies currently under investigation that may more effectively target pathologic CF-CM communication for the treatment of cardiac disease. This review explores novel mechanisms to directly attenuate heart failure progression through inhibition of signaling downstream of pro-inflammatory cytokines that are elevated after cardiac injury.
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22
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ten Cate H. Tissue factor-driven thrombin generation and inflammation in atherosclerosis. Thromb Res 2012; 129 Suppl 2:S38-40. [PMID: 22398011 DOI: 10.1016/j.thromres.2012.02.028] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The transmembrane receptor tissue factor is a prominent protein expressed at macrophages and smooth muscle cells within human atherosclerotic lesions. While many coagulation proteins are detectable in atherosclerosis, a locally active thrombin and fibrin generating molecular machinery may be instrumental in manipulating cellular functions involved in atherogenesis. These include inflammation, angiogenesis and cell proliferation. Indeed, many experimental studies in mice show a correlation between hypercoagulability and increased atherosclerosis. In mice, the amount of atherosclerosis and/or the plaque phenotype, appear to be modifiable by specific anticoagulant interventions. While attempts to vary tissue factor level in the vasculature does not directly reduce plaque burden, the overexpression of tissue factor pathway inhibitor attenuates thrombogenicity and neo intima formation in mice. Moreover, inhibition of factor Xa or thrombin with novel selective agents, including rivaroxaban and dabigatran, inhibits inflammation associated with atherosclerosis in apoE(-/-) mice. The potential to modify a complex chronic disease like atherosclerosis with novel selective anticoagulants merits further clinical study.
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Affiliation(s)
- Hugo ten Cate
- Laboratory for Clinical Thrombosis and Hemostasis, Department of Internal medicine and Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Center, Maastricht, The Netherlands.
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23
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Srinivasan R, Ozhegov E, van den Berg YW, Aronow BJ, Franco RS, Palascak MB, Fallon JT, Ruf W, Versteeg HH, Bogdanov VY. Splice variants of tissue factor promote monocyte-endothelial interactions by triggering the expression of cell adhesion molecules via integrin-mediated signaling. J Thromb Haemost 2011; 9:2087-96. [PMID: 21812913 PMCID: PMC3292430 DOI: 10.1111/j.1538-7836.2011.04454.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND TF is highly expressed in cancerous and atherosclerotic lesions. Monocyte recruitment is a hallmark of disease progression in these pathological states. OBJECTIVE To examine the role of integrin signaling in TF-dependent recruitment of monocytes by endothelial cells. METHODS The expression of flTF and asTF in cervical cancer and atherosclerotic lesions was examined. Biologic effects of the exposure of primary microvascular endothelial cells (MVEC) to truncated flTF ectodomain (LZ-TF) and recombinant asTF were assessed. RESULTS flTF and asTF exhibited nearly identical expression patterns in cancer lesions and lipid-rich plaques. Tumor lesions, as well as stromal CD68(+) monocytes/macrophages, expressed both TF forms. Primary MVEC rapidly adhered to asTF and LZ-TF, and this was completely blocked by anti-β1 integrin antibody. asTF- and LZ-TF-treatment of MVEC promoted adhesion of peripheral blood mononuclear cells (PBMCs) under orbital shear conditions and under laminar flow; asTF-elicited adhesion was more pronounced than that elicited by LZ-TF. Expression profiling and western blotting revealed a broad activation of cell adhesion molecules (CAMs) in MVEC following asTF treatment including E-selectin, ICAM-1 and VCAM-1. In transwell assays, asTF potentiated PMBC migration through MVEC monolayers by ∼3-fold under MCP-1 gradient. CONCLUSIONS TF splice variants ligate β1 integrins on MVEC, which induces the expression of CAMs in MVEC and leads to monocyte adhesion and transendothelial migration. asTF appears more potent than flTF in eliciting these effects. Our findings underscore the pathophysiologic significance of non-proteolytic, integrin-mediated signaling by the two naturally occurring TF variants in cancer and atherosclerosis.
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Affiliation(s)
- R Srinivasan
- Division of Hematology/Oncology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
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24
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Affiliation(s)
- Julian Ilcheff Borissoff
- Laboratory for Clinical Thrombosis and Hemostasis, Department of Internal Medicine, Cardiovascular Research Institute of Maastricht, Maastricht University Medical Center, Maastricht, The Netherlands
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25
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Abstract
The coagulation cascade represents a system of proteases responsible to maintain vascular integrity and to induce rapid clot formation after vessel injury. Tissue factor (TF), the key initiator of the coagulation cascade, binds to factor VIIa and thereby activates factor IX and factor X, resulting in thrombus formation. Different stimuli enhance TF gene expression in endothelial and vascular smooth muscle cells. In addition to these vascular cells, TF has recently been detected in the bloodstream in circulating cells such as leukocytes and platelets, as a component of microparticles, and as a soluble, alternatively spliced form of TF. Various cardiovascular risk factors like hypertension, diabetes, and dyslipidemia, increase levels of TF. In line with this observation, enhanced vascular TF expression occurs during atherogenesis, particularly in patients with acute coronary syndromes. (Circ J 2010; 74: 3 - 12).
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Affiliation(s)
- Alexander Breitenstein
- Cardiovascular Research, Physiology Institute, University of Zurich, Zurich, Switzerland
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26
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Abstract
TF (tissue factor) is the main trigger of the coagulation cascade; by binding Factor VIIa it activates Factor IX and Factor X, thereby resulting in fibrin formation. Various stimuli, such as cytokines, growth factors and biogenic amines, induce TF expression and activity in vascular cells. Downstream targets of these mediators include diverse signalling molecules such as MAPKs (mitogen-activated protein kinases), PI3K (phosphoinositide 3-kinase) and PKC (protein kinase C). In addition, TF can be detected in the bloodstream, known as circulating or blood-borne TF. Many cardiovascular risk factors, such as hypertension, diabetes, dyslipidaemia and smoking, are associated with increased expression of TF. Furthermore, in patients presenting with acute coronary syndromes, elevated levels of circulating TF are found. Apart from its role in thrombosis, TF has pro-atherogenic properties, as it is involved in neointima formation by inducing vascular smooth muscle cell migration. As inhibition of TF action appears to be an attractive target for the treatment of cardiovascular disease, therapeutic strategies are under investigation to specifically interfere with the action of TF or, alternatively, promote the effects of TFPI (TF pathway inhibitor).
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27
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Hamilton JR, Cornelissen I, Mountford JK, Coughlin SR. Atherosclerosis proceeds independently of thrombin-induced platelet activation in ApoE-/- mice. Atherosclerosis 2009; 205:427-32. [PMID: 19217621 DOI: 10.1016/j.atherosclerosis.2009.01.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2008] [Revised: 12/22/2008] [Accepted: 01/09/2009] [Indexed: 01/07/2023]
Abstract
Platelet activation has long been postulated to contribute to the development of atherosclerotic plaques, although the mechanism by which this might occur remains unknown. Thrombin is a potent platelet activator and transfusion of thrombin-activated platelets into mice increases plaque formation, suggesting that thrombin-induced platelet activation might contribute to platelet-dependent atherosclerosis. Platelets from protease-activated receptor 4-deficient (Par4-/-) mice fail to respond to thrombin. To determine whether thrombin-activated platelets play a necessary role in a model of atherogenesis, we compared plaque formation and progression in Par4+/+ and Par4-/- mice in the atherosclerosis-prone apolipoprotein E-deficient (ApoE-/-) background. Littermate Par4+/+ and Par4-/- mice, all ApoE-/-, were placed on a Western diet (21% fat, 0.15% cholesterol) for 5 or 10 weeks. The percent of aortic lumenal surface covered by plaques in Par4+/+ and Par4-/- mice was not different at either time point (2.2+/-0.3% vs. 2.5+/-0.2% and 5.1+/-0.4% vs. 5.6+/-0.4% after 5 and 10 weeks, respectively). Further, no differences were detected in the cross-sectional area of plaques measured at the aortic root (1.53+/-0.17 vs. 1.66+/-0.16x10(5)microm(2) and 12.56+/-1.23 vs. 13.03+/-0.55x10(5)microm(2) after 5 and 10 weeks, respectively). These findings indicate that thrombin-mediated platelet activation is not required for the early development of atherosclerotic plaques in the ApoE-/- mouse model and suggest that, if platelet activation is required for plaque formation under these experimental conditions, platelet activators other than thrombin suffice.
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Affiliation(s)
- J R Hamilton
- Australian Centre for Blood Diseases, Monash University, Melbourne, VIC, Australia.
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28
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Mackman N, Taubman MB. Does Tissue Factor Expression by Vascular Smooth Muscle Cells Provide a Link Between C-Reactive Protein and Cardiovascular Disease? Arterioscler Thromb Vasc Biol 2008; 28:601-3. [DOI: 10.1161/atvbaha.108.165050] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Nigel Mackman
- From the Department of Medicine (N.M.), University of North Carolina at Chapel Hill, NC; and the Aab Cardiovascular Research Institute, Department of Medicine (M.B.T.), University of Rochester, NY
| | - Mark B. Taubman
- From the Department of Medicine (N.M.), University of North Carolina at Chapel Hill, NC; and the Aab Cardiovascular Research Institute, Department of Medicine (M.B.T.), University of Rochester, NY
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29
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Toi S, Shibata N, Sawada T, Kobayashi M, Uchiyama S. Activation of the non-receptor tyrosine kinase cSrc in macrophage-rich atherosclerotic plaques of human carotid arteries. Acta Histochem Cytochem 2007; 40:153-61. [PMID: 18224247 PMCID: PMC2156080 DOI: 10.1267/ahc.07026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2007] [Accepted: 11/26/2007] [Indexed: 11/22/2022] Open
Abstract
To determine the involvement of the non-receptor tyrosine kinase cSrc in plaque destabilization in carotid atherosclerosis (CAS), which is responsible for cerebral infarction, we performed quantitative and morphological detection of phosphorylated active cSrc (p-cSrc) and histopathological examination in CAS lesions. We examined carotid endarterectomy specimens obtained from 32 CAS patients. Each specimen was used for immunoblot and immunohistochemical analyses of p-cSrc, histopathological analysis, and image analysis of macrophage content. There was a strong positive correlation between cSrc activation on blots and macrophage content on sections. When we defined the macrophage-rich plaque (MRP) and the macrophage-poor plaque (MPP) as having macrophage content more and less than 5%, respectively, the p-cSrc density and the occurrence of plaque hemorrhage and thrombus formation were significantly increased in the MRP group (n=18) compared to the MPP group (n=14). p-cSrc immunoreactivity was localized in lesional endothelial cells, macrophages, and smooth muscle cells, which contained proinflammatory substances: the upstream oxidized low density lipoprotein, tissue factor and osteopontin, and the downstream active forms of extracellular signal-activated kinase and p38 and nuclear factor-kappaB. Our results suggest that cSrc activation in lesional cells contributes to plaque destabilization in CAS via persistent inflammation.
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Affiliation(s)
- Sono Toi
- Department of Neurology, Tokyo Women’s Medical University, 8–1 Kawada-cho, Shinjuku-ku, Tokyo 162–8666, Japan
| | - Noriyuki Shibata
- Department of Pathology, Tokyo Women’s Medical University, 8–1 Kawada-cho, Shinjuku-ku, Tokyo 162–8666, Japan
| | - Tatsuo Sawada
- Department of Pathology, Tokyo Women’s Medical University, 8–1 Kawada-cho, Shinjuku-ku, Tokyo 162–8666, Japan
| | - Makio Kobayashi
- Department of Pathology, Tokyo Women’s Medical University, 8–1 Kawada-cho, Shinjuku-ku, Tokyo 162–8666, Japan
| | - Shinichiro Uchiyama
- Department of Neurology, Tokyo Women’s Medical University, 8–1 Kawada-cho, Shinjuku-ku, Tokyo 162–8666, Japan
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30
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Lima LM, Sousa MO, Dusse LMS, Lasmar MC, das Graças Carvalho M, Lwaleed BA. Tissue factor and tissue factor pathway inhibitor levels in coronary artery disease: Correlation with the severity of atheromatosis. Thromb Res 2007; 121:283-7. [PMID: 17582470 DOI: 10.1016/j.thromres.2007.04.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2006] [Revised: 03/12/2007] [Accepted: 04/20/2007] [Indexed: 10/23/2022]
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31
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Wilson KM, McCaw RB, Leo L, Arning E, Lhoták S, Bottiglieri T, Austin RC, Lentz SR. Prothrombotic Effects of Hyperhomocysteinemia and Hypercholesterolemia in ApoE-Deficient Mice. Arterioscler Thromb Vasc Biol 2007; 27:233-40. [PMID: 17082485 DOI: 10.1161/01.atv.0000251607.96118.af] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective—
We tested the hypothesis that hyperhomocysteinemia and hypercholesterolemia promote arterial thrombosis in mice.
Methods and Results—
Male apolipoprotein E (
Apoe
)-deficient mice were fed one of four diets: control, hyperhomocysteinemic (HH), high fat (HF), or high fat/hyperhomocysteinemic (HF/HH). Total cholesterol was elevated 2-fold with the HF or HF/HH diets compared with the control or HH diets (
P
<0.001). Plasma total homocysteine (tHcy) was elevated (12 to 15 μmol/L) with the HH or HF/HH diets compared with the control or HF diets (4 to 6 μmol/L;
P
<0.001). Aortic sinus lesion area correlated strongly with total cholesterol (
P
<0.001) but was independent of tHcy. At 12 weeks of age, the time to thrombotic occlusion of the carotid artery after photochemical injury was >50% shorter in mice fed the HF diets, with or without hyperhomocysteinemia, compared with the control diet (
P
<0.05). At 24 weeks of age, carotid artery thrombosis was also accelerated in mice fed the HH diet (
P
<0.05). Endothelium-dependent nitric oxide–mediated relaxation of carotid artery rings was impaired in mice fed the HF, HH, or HF/HH diets compared with the control diet (
P
<0.05).
Conclusions—
Hyperhomocysteinemia and hypercholesterolemia, alone or in combination, produce endothelial dysfunction and increased susceptibility to thrombosis in Apoe-deficient mice.
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Affiliation(s)
- Katina M Wilson
- Department of Internal Medicine, The University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
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