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Gibson Hughes TA, Dona MSI, Sobey CG, Pinto AR, Drummond GR, Vinh A, Jelinic M. Aortic Cellular Heterogeneity in Health and Disease: Novel Insights Into Aortic Diseases From Single-Cell RNA Transcriptomic Data Sets. Hypertension 2024; 81:738-751. [PMID: 38318714 DOI: 10.1161/hypertensionaha.123.20597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Aortic diseases such as atherosclerosis, aortic aneurysms, and aortic stiffening are significant complications that can have significant impact on end-stage cardiovascular disease. With limited pharmacological therapeutic strategies that target the structural changes in the aorta, surgical intervention remains the only option for some patients with these diseases. Although there have been significant contributions to our understanding of the cellular architecture of the diseased aorta, particularly in the context of atherosclerosis, furthering our insight into the cellular drivers of disease is required. The major cell types of the aorta are well defined; however, the advent of single-cell RNA sequencing provides unrivaled insights into the cellular heterogeneity of each aortic cell type and the inferred biological processes associated with each cell in health and disease. This review discusses previous concepts that have now been enhanced with recent advances made by single-cell RNA sequencing with a focus on aortic cellular heterogeneity.
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Affiliation(s)
- Tayla A Gibson Hughes
- Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia (T.A.G.H., C.G.S., A.R.P., G.R.D., A.V., M.J.)
| | - Malathi S I Dona
- Baker Heart and Diabetes Research Institute, Melbourne, Victoria, Australia (M.S.I.D., A.R.P.)
| | - Christopher G Sobey
- Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia (T.A.G.H., C.G.S., A.R.P., G.R.D., A.V., M.J.)
| | - Alexander R Pinto
- Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia (T.A.G.H., C.G.S., A.R.P., G.R.D., A.V., M.J.)
- Baker Heart and Diabetes Research Institute, Melbourne, Victoria, Australia (M.S.I.D., A.R.P.)
| | - Grant R Drummond
- Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia (T.A.G.H., C.G.S., A.R.P., G.R.D., A.V., M.J.)
| | - Antony Vinh
- Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia (T.A.G.H., C.G.S., A.R.P., G.R.D., A.V., M.J.)
| | - Maria Jelinic
- Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia (T.A.G.H., C.G.S., A.R.P., G.R.D., A.V., M.J.)
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Shea AA, Heffron CL, Grieco JP, Roberts PC, Schmelz EM. Obesity modulates the cellular and molecular microenvironment in the peritoneal cavity: implication for ovarian cancer risk. Front Immunol 2024; 14:1323399. [PMID: 38264656 PMCID: PMC10803595 DOI: 10.3389/fimmu.2023.1323399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 12/12/2023] [Indexed: 01/25/2024] Open
Abstract
Introduction Abdominal obesity increases the risk of developing ovarian cancer but the molecular mechanisms of how obesity supports ovarian cancer development remain unknown. Here we investigated the impact of obesity on the immune cell and gene expression profiles of distinct abdominal tissues, focusing on the peritoneal serous fluid (PSF) and the omental fat band (OFB) as critical determinants for the dissemination of ovarian metastases and early metastatic events within the peritoneal cavity. Methods Female C57BL/6 mice were fed a low-fat (LFD) or a high-fat diet (HFD) for 12 weeks until the body weights in the HFD group were significantly higher and the mice displayed an impaired glucose tolerance. Then the mice were injected with the murine ovarian cancer cells (MOSE-LTICv) while remaining on their diets. After 21 days, the mice were sacrificed, tumor burden was evaluated and tissues were harvested. The immune cell composition of abdominal tissues and changes in gene expression in the PSF and OFB were evaluated by flow cytometry and qPCR RT2-profiler PCR arrays and confirmed by qRT-PCR, respectively. Other peritoneal adipose tissues including parametrial and retroperitoneal white adipose tissues as well as blood were also investigated. Results While limited effects were observed in the other peritoneal adipose tissues, feeding mice the HFD led to distinct changes in the immune cell composition in the PSF and the OFB: a depletion of B cells but an increase in myeloid-derived suppressor cells (MDSC) and mono/granulocytes, generating pro-inflammatory environments with increased expression of cyto- and chemokines, and genes supporting adhesion, survival, and growth, as well as suppression of apoptosis. This was associated with a higher peritoneal tumor burden compared to mice fed a LFD. Changes in cellular and genetic profiles were often exacerbated by the HFD. There was a large overlap in genes that were modulated by both the HFD and the cancer cells, suggesting that this 'genetic fingerprint' is important for ovarian metastases to the OFB. Discussion In accordance with the 'seed and soil' theory, our studies show that obesity contributes to the generation of a pro-inflammatory peritoneal environment that supports the survival of disseminating ovarian cancer cells in the PSF and the OFB and enhances the early metastatic adhesion events in the OFB through an increase in extracellular matrix proteins and modulators such as fibronectin 1 and collagen I expression as well as in genes supporting growth and invasion such as Tenacin C. The identified genes could potentially be used as targets for prevention strategies to lower the ovarian cancer risk in women with obesity.
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Affiliation(s)
- Amanda A. Shea
- Department of Human Nutrition, Foods and Exercise, Virginia Tech, Blacksburg, VA, United States
| | - Connie Lynn Heffron
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, Blacksburg, VA, United States
| | - Joseph P. Grieco
- Graduate Program in Translational Biology, Medicine, and Health, Virginia Tech, Blacksburg, VA, United States
| | - Paul C. Roberts
- Department of Biomedical Sciences and Pathobiology, Virginia Tech, Blacksburg, VA, United States
| | - Eva M. Schmelz
- Department of Human Nutrition, Foods and Exercise, Virginia Tech, Blacksburg, VA, United States
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Elster C, Ommer-Bläsius M, Lang A, Vajen T, Pfeiler S, Feige M, Yau Pang T, Böttenberg M, Verheyen S, Lê Quý K, Chernigovskaya M, Kelm M, Winkels H, Schmidt SV, Greiff V, Gerdes N. Application and challenges of TCR and BCR sequencing to investigate T- and B-cell clonality in elastase-induced experimental murine abdominal aortic aneurysm. Front Cardiovasc Med 2023; 10:1221620. [PMID: 38034381 PMCID: PMC10686233 DOI: 10.3389/fcvm.2023.1221620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 10/16/2023] [Indexed: 12/02/2023] Open
Abstract
Background An abdominal aortic aneurysm (AAA) is a life-threatening cardiovascular disease. Although its pathogenesis is still poorly understood, recent evidence suggests that AAA displays autoimmune disease characteristics. Particularly, T cells responding to AAA-related antigens in the aortic wall may contribute to an initial immune response. Single-cell RNA (scRNA) T cell receptor (TCR) and B cell receptor (BCR) sequencing is a powerful tool for investigating clonality. However, difficulties such as limited numbers of isolated cells must be considered during implementation and data analysis, making biological interpretation challenging. Here, we perform a representative single-cell immune repertoire analysis in experimental murine AAA and show a reliable bioinformatic processing pipeline highlighting opportunities and limitations of this approach. Methods We performed scRNA TCR and BCR sequencing of isolated lymphocytes from the infrarenal aorta of male C57BL/6J mice 3, 7, 14, and 28 days after AAA induction via elastase perfusion of the aorta. Sham-operated mice at days 3 and 28 and non-operated mice served as controls. Results Comparison of complementarity-determining region (CDR3) length distribution of 179 B cells and 796 T cells revealed neither differences between AAA and control nor between the disease stages. We found no clonal expansion of B cells in AAA. For T cells, we identified several clones in 11 of 16 AAA samples and one of eight control samples. Immune receptor repertoire comparison indicated that only a few clones were shared between the individual AAA samples. The most frequently used V-genes in the TCR beta chain in AAA were TRBV3, TRBV19, and the splicing variant TRBV12-2 + TRBV13-2. Conclusion We found no clonal expansion of B cells but evidence for clonal expansion of T cells in elastase-induced AAA in mice. Our findings imply that a more precise characterization of TCR and BCR distribution requires a more extensive number of lymphocytes to prevent undersampling and potentially detect rare clones. Thus, further experiments are necessary to confirm our findings. In summary, this paper examines TCR and BCR sequencing results, identifies limitations and pitfalls, and offers guidance for future studies.
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Affiliation(s)
- Christin Elster
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty and University Hospital, Heinrich Heine University, Düsseldorf, Germany
| | - Miriam Ommer-Bläsius
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty and University Hospital, Heinrich Heine University, Düsseldorf, Germany
| | - Alexander Lang
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty and University Hospital, Heinrich Heine University, Düsseldorf, Germany
| | - Tanja Vajen
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty and University Hospital, Heinrich Heine University, Düsseldorf, Germany
| | - Susanne Pfeiler
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty and University Hospital, Heinrich Heine University, Düsseldorf, Germany
| | - Milena Feige
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty and University Hospital, Heinrich Heine University, Düsseldorf, Germany
| | - Tin Yau Pang
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty and University Hospital, Heinrich Heine University, Düsseldorf, Germany
- Department of Biology, Institute for Computer Science, Heinrich Heine University, Düsseldorf, Germany
| | - Marius Böttenberg
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty and University Hospital, Heinrich Heine University, Düsseldorf, Germany
| | - Sarah Verheyen
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty and University Hospital, Heinrich Heine University, Düsseldorf, Germany
| | - Khang Lê Quý
- Department of Immunology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Maria Chernigovskaya
- Department of Immunology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Malte Kelm
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty and University Hospital, Heinrich Heine University, Düsseldorf, Germany
- Cardiovascular Research Institute Düsseldorf (CARID), Medical Faculty, Heinrich Heine University, Düsseldorf, Germany
| | - Holger Winkels
- Department of Cardiology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Susanne V. Schmidt
- Institute of Innate Immunity, Medical Faculty and University Hospital, Rheinische Friedrich-Wilhelms-University, Bonn, Germany
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, Bonn, Germany
| | - Victor Greiff
- Department of Immunology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Norbert Gerdes
- Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty and University Hospital, Heinrich Heine University, Düsseldorf, Germany
- Cardiovascular Research Institute Düsseldorf (CARID), Medical Faculty, Heinrich Heine University, Düsseldorf, Germany
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Li S, Li J, Cheng W, He W, Dai SS. Independent and Interactive Roles of Immunity and Metabolism in Aortic Dissection. Int J Mol Sci 2023; 24:15908. [PMID: 37958896 PMCID: PMC10647240 DOI: 10.3390/ijms242115908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 10/22/2023] [Accepted: 10/27/2023] [Indexed: 11/15/2023] Open
Abstract
Aortic dissection (AD) is a cardiovascular disease that seriously endangers the lives of patients. The mortality rate of this disease is high, and the incidence is increasing annually, but the pathogenesis of AD is complicated. In recent years, an increasing number of studies have shown that immune cell infiltration in the media and adventitia of the aorta is a novel hallmark of AD. These cells contribute to changes in the immune microenvironment, which can affect their own metabolism and that of parenchymal cells in the aortic wall, which are essential factors that induce degeneration and remodeling of the vascular wall and play important roles in the formation and development of AD. Accordingly, this review focuses on the independent and interactive roles of immunity and metabolism in AD to provide further insights into the pathogenesis, novel ideas for diagnosis and new strategies for treatment or early prevention of AD.
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Affiliation(s)
- Siyu Li
- School of Medicine, Chongqing University, Chongqing 400044, China
- Department of Biochemistry and Molecular Biology, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Jun Li
- Department of Cardiac Surgery, The First Affiliated Hospital of Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Wei Cheng
- Department of Cardiac Surgery, The First Affiliated Hospital of Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Wenhui He
- Department of Biochemistry and Molecular Biology, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Shuang-Shuang Dai
- School of Medicine, Chongqing University, Chongqing 400044, China
- Department of Biochemistry and Molecular Biology, Third Military Medical University (Army Medical University), Chongqing 400038, China
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Zhang Y, Liu T, Deng Z, Fang W, Zhang X, Zhang S, Wang M, Luo S, Meng Z, Liu J, Sukhova GK, Li D, McKenzie ANJ, Libby P, Shi G, Guo J. Group 2 Innate Lymphoid Cells Protect Mice from Abdominal Aortic Aneurysm Formation via IL5 and Eosinophils. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2206958. [PMID: 36592421 PMCID: PMC9982556 DOI: 10.1002/advs.202206958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Indexed: 06/17/2023]
Abstract
Development of abdominal aortic aneurysms (AAA) enhances lesion group-2 innate lymphoid cell (ILC2) accumulation and blood IL5. ILC2 deficiency in Rorafl/fl Il7rCre/+ mice or induced ILC2 depletion in Icosfl-DTR-fl/+ Cd4Cre/+ mice expedites AAA growth, increases lesion inflammation, but leads to systemic IL5 and eosinophil (EOS) deficiency. Mechanistic studies show that ILC2 protect mice from AAA formation via IL5 and EOS. IL5 or ILC2 from wild-type (WT) mice, but not ILC2 from Il5-/- mice induces EOS differentiation in bone-marrow cells from Rorafl/fl Il7rCre/+ mice. IL5, IL13, and EOS or ILC2 from WT mice, but not ILC2 from Il5-/- and Il13-/- mice block SMC apoptosis and promote SMC proliferation. EOS but not ILC2 from WT or Il5-/- mice block endothelial cell (EC) adhesion molecule expression, angiogenesis, dendritic cell differentiation, and Ly6Chi monocyte polarization. Reconstitution of WT EOS and ILC2 but not Il5-/- ILC2 slows AAA growth in Rorafl/fl Il7rCre/+ mice by increasing systemic EOS. Besides regulating SMC pathobiology, ILC2 play an indirect role in AAA protection via the IL5 and EOS mechanism.
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Affiliation(s)
- Yuanyuan Zhang
- Hainan Provincial Key Laboratory for Tropical Cardiovascular Diseases Research, Key Laboratory of Emergency and Trauma of Ministry of EducationInstitute of Cardiovascular Research of the First Affiliated HospitalHainan Medical UniversityHaikou571199China
- Department of MedicineBrigham and Women's Hospital and Harvard Medical SchoolBostonMA02115USA
| | - Tianxiao Liu
- Department of MedicineBrigham and Women's Hospital and Harvard Medical SchoolBostonMA02115USA
- Guangdong Provincial Geriatrics InstituteGuangdong Provincial People's HospitalGuangdong Academy of Medical SciencesGuangzhou510080China
| | - Zhiyong Deng
- Department of MedicineBrigham and Women's Hospital and Harvard Medical SchoolBostonMA02115USA
- Department of GeriatricsNational Key Clinic SpecialtyGuangzhou First People's HospitalSchool of MedicineSouth China University of TechnologyGuangzhou510180China
| | - Wenqian Fang
- Department of MedicineBrigham and Women's Hospital and Harvard Medical SchoolBostonMA02115USA
- Cardiac Regeneration and Ageing LabInstitute of Cardiovascular SciencesSchool of Life ScienceShanghai UniversityShanghai200444China
| | - Xian Zhang
- Department of MedicineBrigham and Women's Hospital and Harvard Medical SchoolBostonMA02115USA
| | - Shuya Zhang
- Hainan Provincial Key Laboratory for Tropical Cardiovascular Diseases Research, Key Laboratory of Emergency and Trauma of Ministry of EducationInstitute of Cardiovascular Research of the First Affiliated HospitalHainan Medical UniversityHaikou571199China
- Department of MedicineBrigham and Women's Hospital and Harvard Medical SchoolBostonMA02115USA
| | - Minjie Wang
- Department of MedicineBrigham and Women's Hospital and Harvard Medical SchoolBostonMA02115USA
| | - Songyuan Luo
- Department of MedicineBrigham and Women's Hospital and Harvard Medical SchoolBostonMA02115USA
| | - Zhaojie Meng
- Department of MedicineBrigham and Women's Hospital and Harvard Medical SchoolBostonMA02115USA
| | - Jing Liu
- Department of MedicineBrigham and Women's Hospital and Harvard Medical SchoolBostonMA02115USA
| | - Galina K. Sukhova
- Department of MedicineBrigham and Women's Hospital and Harvard Medical SchoolBostonMA02115USA
| | - Dazhu Li
- Department of CardiologyUnion HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China
| | - Andrew N. J. McKenzie
- Division of Protein & Nucleic Acid ChemistryMRC Laboratory of Molecular BiologyCambridgeCB2 0QHUK
| | - Peter Libby
- Department of MedicineBrigham and Women's Hospital and Harvard Medical SchoolBostonMA02115USA
| | - Guo‐Ping Shi
- Department of MedicineBrigham and Women's Hospital and Harvard Medical SchoolBostonMA02115USA
| | - Junli Guo
- Hainan Provincial Key Laboratory for Tropical Cardiovascular Diseases Research, Key Laboratory of Emergency and Trauma of Ministry of EducationInstitute of Cardiovascular Research of the First Affiliated HospitalHainan Medical UniversityHaikou571199China
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The mechanism and therapy of aortic aneurysms. Signal Transduct Target Ther 2023; 8:55. [PMID: 36737432 PMCID: PMC9898314 DOI: 10.1038/s41392-023-01325-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 12/15/2022] [Accepted: 01/14/2023] [Indexed: 02/05/2023] Open
Abstract
Aortic aneurysm is a chronic aortic disease affected by many factors. Although it is generally asymptomatic, it poses a significant threat to human life due to a high risk of rupture. Because of its strong concealment, it is difficult to diagnose the disease in the early stage. At present, there are no effective drugs for the treatment of aneurysms. Surgical intervention and endovascular treatment are the only therapies. Although current studies have discovered that inflammatory responses as well as the production and activation of various proteases promote aortic aneurysm, the specific mechanisms remain unclear. Researchers are further exploring the pathogenesis of aneurysms to find new targets for diagnosis and treatment. To better understand aortic aneurysm, this review elaborates on the discovery history of aortic aneurysm, main classification and clinical manifestations, related molecular mechanisms, clinical cohort studies and animal models, with the ultimate goal of providing insights into the treatment of this devastating disease. The underlying problem with aneurysm disease is weakening of the aortic wall, leading to progressive dilation. If not treated in time, the aortic aneurysm eventually ruptures. An aortic aneurysm is a local enlargement of an artery caused by a weakening of the aortic wall. The disease is usually asymptomatic but leads to high mortality due to the risk of artery rupture.
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Type I Interferon Receptor Subunit 1 Deletion Attenuates Experimental Abdominal Aortic Aneurysm Formation. Biomolecules 2022; 12:biom12101541. [PMID: 36291750 PMCID: PMC9599283 DOI: 10.3390/biom12101541] [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: 09/07/2022] [Revised: 10/14/2022] [Accepted: 10/17/2022] [Indexed: 11/16/2022] Open
Abstract
Objective: Type I interferon receptor signaling contributes to several autoimmune and vascular diseases such as lupus, atherosclerosis and stroke. The purpose of this study was to assess the influence of type I interferon receptor deficiency on the formation and progression of experimental abdominal aortic aneurysms (AAAs). Methods: AAAs were induced in type I interferon receptor subunit 1 (IFNAR1)-deficient and wild type control male mice via intra-infrarenal aortic infusion of porcine pancreatic elastase. Immunostaining for IFNAR1 was evaluated in experimental and clinical aneurysmal abdominal aortae. The initiation and progression of experimental AAAs were assessed via ultrasound imaging prior to (day 0) and days 3, 7 and 14 following elastase infusion. Aneurysmal histopathology was analyzed at sacrifice. Results: Increased aortic medial and adventitial IFNAR1 expression was present in both clinical AAAs harvested at surgery and experimental AAAs. Following AAA induction, wild type mice experienced progressive, time-dependent infrarenal aortic enlargement. This progression was substantially attenuated in IFNAR1-deficient mice. On histological analyses, medial elastin degradation, smooth muscle cell depletion, leukocyte accumulation and neoangiogenesis were markedly diminished in IFNAR1-deficient mice in comparison to wild type mice. Conclusion: IFNAR1 deficiency limited experimental AAA progression in response to intra-aortic elastase infusion. Combined with clinical observations, these results suggest an important role for IFNAR1 activity in AAA pathogenesis.
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Márquez-Sánchez AC, Koltsova EK. Immune and inflammatory mechanisms of abdominal aortic aneurysm. Front Immunol 2022; 13:989933. [PMID: 36275758 PMCID: PMC9583679 DOI: 10.3389/fimmu.2022.989933] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 08/23/2022] [Indexed: 11/13/2022] Open
Abstract
Abdominal aortic aneurysm (AAA) is a life-threatening cardiovascular disease. Immune-mediated infiltration and a destruction of the aortic wall during AAA development plays significant role in the pathogenesis of this disease. While various immune cells had been found in AAA, the mechanisms of their activation and function are still far from being understood. A better understanding of mechanisms regulating the development of aberrant immune cell activation in AAA is essential for the development of novel preventive and therapeutic approaches. In this review we summarize current knowledge about the role of immune cells in AAA and discuss how pathogenic immune cell activation is regulated in this disease.
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Li Z, Cong X, Kong W. Matricellular proteins: Potential biomarkers and mechanistic factors in aortic aneurysms. J Mol Cell Cardiol 2022; 169:41-56. [DOI: 10.1016/j.yjmcc.2022.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 03/30/2022] [Accepted: 05/03/2022] [Indexed: 10/18/2022]
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Xiong T, Lv XS, Wu GJ, Guo YX, Liu C, Hou FX, Wang JK, Fu YF, Liu FQ. Single-Cell Sequencing Analysis and Multiple Machine Learning Methods Identified G0S2 and HPSE as Novel Biomarkers for Abdominal Aortic Aneurysm. Front Immunol 2022; 13:907309. [PMID: 35769488 PMCID: PMC9234288 DOI: 10.3389/fimmu.2022.907309] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 05/06/2022] [Indexed: 11/20/2022] Open
Abstract
Identifying biomarkers for abdominal aortic aneurysms (AAA) is key to understanding their pathogenesis, developing novel targeted therapeutics, and possibly improving patients outcomes and risk of rupture. Here, we identified AAA biomarkers from public databases using single-cell RNA-sequencing, weighted co-expression network (WGCNA), and differential expression analyses. Additionally, we used the multiple machine learning methods to identify biomarkers that differentiated large AAA from small AAA. Biomarkers were validated using GEO datasets. CIBERSORT was used to assess immune cell infiltration into AAA tissues and investigate the relationship between biomarkers and infiltrating immune cells. Therefore, 288 differentially expressed genes (DEGs) were screened for AAA and normal samples. The identified DEGs were mostly related to inflammatory responses, lipids, and atherosclerosis. For the large and small AAA samples, 17 DEGs, mostly related to necroptosis, were screened. As biomarkers for AAA, G0/G1 switch 2 (G0S2) (Area under the curve [AUC] = 0.861, 0.875, and 0.911, in GSE57691, GSE47472, and GSE7284, respectively) and for large AAA, heparinase (HPSE) (AUC = 0.669 and 0.754, in GSE57691 and GSE98278, respectively) were identified and further verified by qRT-PCR. Immune cell infiltration analysis revealed that the AAA process may be mediated by T follicular helper (Tfh) cells and the large AAA process may also be mediated by Tfh cells, M1, and M2 macrophages. Additionally, G0S2 expression was associated with neutrophils, activated and resting mast cells, M0 and M1 macrophages, regulatory T cells (Tregs), resting dendritic cells, and resting CD4 memory T cells. Moreover, HPSE expression was associated with M0 and M1 macrophages, activated and resting mast cells, Tregs, and resting CD4 memory T cells. Additional, G0S2 may be an effective diagnostic biomarker for AAA, whereas HPSE may be used to confer risk of rupture in large AAAs. Immune cells play a role in the onset and progression of AAA, which may improve its diagnosis and treatment.
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Affiliation(s)
- Tao Xiong
- Department of Cardiovascular, Shaanxi Provincial People’s Hospital, Xi’an, China
- Department of Cardiovascular Surgery, Yan'an Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Xiao-Shuo Lv
- Department of Cardiovascular Surgery, China-Japan Friendship Hospital, Beijing, China
| | - Gu-Jie Wu
- Department of Cardiothoracic Surgery, Affiliated Hospital of Nantong University, Nantong, China
| | - Yao-Xing Guo
- Department of Pathology, College of Basic Medical Sciences China Medical University, Shenyang, China
| | - Chang Liu
- Department of Cardiovascular Surgery, Yan'an Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Fang-Xia Hou
- Department of Cardiovascular, Shaanxi Provincial People’s Hospital, Xi’an, China
| | - Jun-Kui Wang
- Department of Cardiovascular, Shaanxi Provincial People’s Hospital, Xi’an, China
| | - Yi-Fan Fu
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Fu-Qiang Liu
- Department of Cardiovascular, Shaanxi Provincial People’s Hospital, Xi’an, China
- *Correspondence: Fu-Qiang Liu,
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Mackay CDA, Jadli AS, Fedak PWM, Patel VB. Adventitial Fibroblasts in Aortic Aneurysm: Unraveling Pathogenic Contributions to Vascular Disease. Diagnostics (Basel) 2022; 12:diagnostics12040871. [PMID: 35453919 PMCID: PMC9025866 DOI: 10.3390/diagnostics12040871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 03/15/2022] [Accepted: 03/28/2022] [Indexed: 12/21/2022] Open
Abstract
Aortic aneurysm (AA) is a degenerative vascular disease that involves aortic dilatation, and, if untreated, it can lead to rupture. Despite its significant impact on the healthcare system, its multifactorial nature and elusive pathophysiology contribute to limited therapeutic interventions that prevent the progression of AA. Thus, further research into the mechanisms underlying AA is paramount. Adventitial fibroblasts are one of the key constituents of the aortic wall, and they play an essential role in maintaining vessel structure and function. However, adventitial fibroblasts remain understudied when compared with endothelial cells and smooth muscle cells. Adventitial fibroblasts facilitate the production of extracellular matrix (ECM), providing structural integrity. However, during biomechanical stress and/or injury, adventitial fibroblasts can be activated into myofibroblasts, which move to the site of injury and secrete collagen and cytokines, thereby enhancing the inflammatory response. The overactivation or persistence of myofibroblasts has been shown to initiate pathological vascular remodeling. Therefore, understanding the underlying mechanisms involved in the activation of fibroblasts and in regulating myofibroblast activation may provide a potential therapeutic target to prevent or delay the progression of AA. This review discusses mechanistic insights into myofibroblast activation and associated vascular remodeling, thus illustrating the contribution of fibroblasts to the pathogenesis of AA.
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Affiliation(s)
- Cameron D. A. Mackay
- Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; (C.D.A.M.); (A.S.J.)
- Libin Cardiovascular Institute, University of Calgary, 3330 Hospital Drive NW HMRB-G71, Calgary, AB T2N 4N1, Canada;
| | - Anshul S. Jadli
- Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; (C.D.A.M.); (A.S.J.)
- Libin Cardiovascular Institute, University of Calgary, 3330 Hospital Drive NW HMRB-G71, Calgary, AB T2N 4N1, Canada;
| | - Paul W. M. Fedak
- Libin Cardiovascular Institute, University of Calgary, 3330 Hospital Drive NW HMRB-G71, Calgary, AB T2N 4N1, Canada;
- Section of Cardiac Surgery, Department of Cardiac Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Vaibhav B. Patel
- Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; (C.D.A.M.); (A.S.J.)
- Libin Cardiovascular Institute, University of Calgary, 3330 Hospital Drive NW HMRB-G71, Calgary, AB T2N 4N1, Canada;
- Correspondence: or ; Tel.: +1-(403)-220-3446
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12
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Plana E, Oto J, Medina P, Herranz R, Fernández-Pardo Á, Requejo L, Miralles M. Thrombospondins in human aortic aneurysms. IUBMB Life 2022; 74:982-994. [PMID: 35293116 DOI: 10.1002/iub.2610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 02/08/2022] [Accepted: 02/12/2022] [Indexed: 11/08/2022]
Abstract
Thrombospondins are a family of matricellular proteins with a multimeric structure that is known to be involved in several biological and pathological processes. Their relationship with vascular disorders has raised special interest recently. Aortic aneurysms are related to the impairment of vascular remodeling, in which extracellular matrix proteins seem to play an important role. Thus, research in thrombospondins, and their potential role in aneurysm development is progressively gaining importance. Nevertheless, studies showing thrombospondin dysregulation in human samples are still scarce. Although studies performed in vitro and in vivo models are essential to understand the molecular mechanisms and pathways underlying the disorder, descriptive studies in human samples are also necessary to ascertain their real value as biomarkers and/or novel therapeutic targets. The present article reviews the latest findings regarding the role of thrombospondins in aortic aneurysm development, paying particular attention to the studies performed in human samples.
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Affiliation(s)
- Emma Plana
- Angiology and Vascular Surgery Service, La Fe University and Polytechnic Hospital, Valencia, Spain.,Haemostasis, Thrombosis, Arteriosclerosis and Vascular Biology Research Group, Medical Research Institute Hospital La Fe, Valencia, Spain
| | - Julia Oto
- Haemostasis, Thrombosis, Arteriosclerosis and Vascular Biology Research Group, Medical Research Institute Hospital La Fe, Valencia, Spain
| | - Pilar Medina
- Haemostasis, Thrombosis, Arteriosclerosis and Vascular Biology Research Group, Medical Research Institute Hospital La Fe, Valencia, Spain
| | - Raquel Herranz
- Haemostasis, Thrombosis, Arteriosclerosis and Vascular Biology Research Group, Medical Research Institute Hospital La Fe, Valencia, Spain
| | - Álvaro Fernández-Pardo
- Haemostasis, Thrombosis, Arteriosclerosis and Vascular Biology Research Group, Medical Research Institute Hospital La Fe, Valencia, Spain
| | - Lucia Requejo
- Angiology and Vascular Surgery Service, La Ribera University Hospital, Alzira, Valencia, Spain
| | - Manuel Miralles
- Angiology and Vascular Surgery Service, La Fe University and Polytechnic Hospital, Valencia, Spain.,Haemostasis, Thrombosis, Arteriosclerosis and Vascular Biology Research Group, Medical Research Institute Hospital La Fe, Valencia, Spain.,Department of Surgery, University of Valencia, Valencia, Spain
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13
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Cerro-Pardo I, Lindholt JS, Núñez E, Roldan-Montero R, Ortega-Villanueva L, Vegas-Dominguez C, Gomez-Guerrero C, Michel JB, Blanco-Colio LM, Vázquez J, Martín-Ventura JL. Combined Immunoglobulin Free Light Chains Are Novel Predictors of Cardiovascular Events in Patients With Abdominal Aortic Aneurysm. Eur J Vasc Endovasc Surg 2022; 63:751-758. [DOI: 10.1016/j.ejvs.2021.11.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 11/08/2021] [Accepted: 11/30/2021] [Indexed: 12/26/2022]
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Sawada H, Lu HS, Cassis LA, Daugherty A. Twenty Years of Studying AngII (Angiotensin II)-Induced Abdominal Aortic Pathologies in Mice: Continuing Questions and Challenges to Provide Insight Into the Human Disease. Arterioscler Thromb Vasc Biol 2022; 42:277-288. [PMID: 35045728 PMCID: PMC8866209 DOI: 10.1161/atvbaha.121.317058] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
AngII (angiotensin II) infusion in mice has been used to provide mechanistic insight into human abdominal aortic aneurysms for over 2 decades. This is a technically facile animal model that recapitulates multiple facets of the human disease. Although numerous publications have reported abdominal aortic aneurysms with AngII infusion in mice, there remain many fundamental unanswered questions such as uniformity of describing the pathological characteristics and which cell type is stimulated by AngII to promote abdominal aortic aneurysms. Extrapolation of the findings to provide insight into the human disease has been hindered by the preponderance of studies designed to determine the effects on initiation of abdominal aortic aneurysms, rather than a more clinically relevant scenario of determining efficacy on the established disease. The purpose of this review is to enhance understanding of AngII-induced abdominal aortic pathologies in mice, thereby providing greater insight into the human disease.
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Affiliation(s)
- Hisashi Sawada
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY,Saha Aortic Center, University of Kentucky, Lexington, KY,Department of Physiology, University of Kentucky, Lexington, KY
| | - Hong S. Lu
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY,Saha Aortic Center, University of Kentucky, Lexington, KY,Department of Physiology, University of Kentucky, Lexington, KY
| | - Lisa A. Cassis
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY
| | - Alan Daugherty
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY,Saha Aortic Center, University of Kentucky, Lexington, KY,Department of Physiology, University of Kentucky, Lexington, KY
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15
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Imaging Techniques for Aortic Aneurysms and Dissections in Mice: Comparisons of Ex Vivo, In Situ, and Ultrasound Approaches. Biomolecules 2022; 12:biom12020339. [PMID: 35204838 PMCID: PMC8869425 DOI: 10.3390/biom12020339] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/14/2022] [Accepted: 02/16/2022] [Indexed: 01/04/2023] Open
Abstract
Aortic aneurysms and dissections are life-threatening conditions that have a high risk for lethal bleeding and organ malperfusion. Many studies have investigated the molecular basis of these diseases using mouse models. In mice, ex vivo, in situ, and ultrasound imaging are major approaches to evaluate aortic diameters, a common parameter to determine the severity of aortic aneurysms. However, accurate evaluations of aortic dimensions by these imaging approaches could be challenging due to pathological features of aortic aneurysms. Currently, there is no standardized mode to assess aortic dissections in mice. It is important to understand the characteristics of each approach for reliable evaluation of aortic dilatations. In this review, we summarize imaging techniques used for aortic visualization in recent mouse studies and discuss their pros and cons. We also provide suggestions to facilitate the visualization of mouse aortas.
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16
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Wu S, Liu S, Chen N, Zhang C, Zhang H, Guo X. Genome-Wide Identification of Immune-Related Alternative Splicing and Splicing Regulators Involved in Abdominal Aortic Aneurysm. Front Genet 2022; 13:816035. [PMID: 35251127 PMCID: PMC8892299 DOI: 10.3389/fgene.2022.816035] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 01/06/2022] [Indexed: 01/08/2023] Open
Abstract
The molecular mechanism of AAA formation is still poorly understood and has not been fully elucidated. The study was designed to identify the immune-related genes, immune-RAS in AAA using bioinformatics methods. The GSE175683 datasets were downloaded from the GEO database. The DEseq2 software was used to identify differentially expressed genes (DEGs). SUVA pipeline was used to quantify AS events and RAS events. KOBAS 2.0 server was used to identify GO terms and KEGG pathways to sort out functional categories of DEGs. The CIBERSORT algorithm was used with the default parameter for estimating immune cell fractions. Nine samples from GSE175683 were used to construct the co-disturbed network between expression of SFs and splicing ratio of RAS events. PCA analysis was performed by R package factoextra to show the clustering of samples, and the pheatmap package in R was used to perform the clustering based on Euclidean distance. The results showed that there were 3,541 genes significantly differentially expressed, of which 177 immune-related genes were upregulated and 48 immune-related genes were downregulated between the WT and WTA group. Immune-RAS events were mainly alt5P and IR events, and about 60% of it was complex splicing events in AAA. The WT group and the WTA group can be clearly distinguished in the first principal component by using the splicing ratio of immune-RAS events. Two downregulated genes, Nr4a1 and Nr4a2, and eight upregulated genes, Adipor2, Akt2, Bcl3, Dhx58, Pparg, Ptgds, Sytl1, and Vegfa were identified among the immune-related genes with RAS and DEGs. Eighteen differentially expressed SFs were identified and displayed by heatmap. The proportion of different types of cells and ratio of the average ratio of different cells were quite different. Both M1 and M2 types of macrophages and plasma cells were upregulated, while M0 type was downregulated in AAA. The proportion of plasma cells in the WTA group had sharply increased. There is a correlation between SF expression and immune cells/immune-RAS. Sf3b1, a splicing factor with significantly different expression, was selected to bind on a mass of immune-related genes. In conclusion, our results showed that immune-related genes, immune-RAS, and SFs by genome-wide identification were involved in AAA.
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Affiliation(s)
- Shiyong Wu
- Department of Vascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Shibiao Liu
- Department of Vascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Ningheng Chen
- Department of Vascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Chuang Zhang
- Department of Vascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Hairong Zhang
- Department of Colorectal and Anal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- *Correspondence: Hairong Zhang, ; Xueli Guo,
| | - Xueli Guo
- Department of Vascular Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- *Correspondence: Hairong Zhang, ; Xueli Guo,
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17
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Osinski V, Srikakulapu P, Haider YM, Marshall MA, Ganta VC, Annex BH, McNamara CA. Loss of Id3 (Inhibitor of Differentiation 3) Increases the Number of IgM-Producing B-1b Cells in Ischemic Skeletal Muscle Impairing Blood Flow Recovery During Hindlimb Ischemia. Arterioscler Thromb Vasc Biol 2022; 42:6-18. [PMID: 34809449 PMCID: PMC8702457 DOI: 10.1161/atvbaha.120.315501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVE Neovascularization can maintain and even improve tissue perfusion in the setting of limb ischemia during peripheral artery disease. The molecular and cellular mechanisms mediating this process are incompletely understood. We investigate the potential role(s) for Id3 (inhibitor of differentiation 3) in regulating blood flow in a murine model of hindlimb ischemia (HLI). Approach and Results: HLI was modeled through femoral artery ligation and resection and blood flow recovery was quantified by laser Doppler perfusion imaging. Mice with global Id3 deletion had significantly impaired perfusion recovery at 14 and 21 days of HLI. Endothelial- or myeloid cell-specific deletion of Id3 revealed no effect on perfusion recovery while B-cell-specific knockout of Id3 (Id3BKO) revealed a significant attenuation of perfusion recovery. Flow cytometry revealed no differences in ischemia-induced T cells or myeloid cell numbers at 7 days of HLI, yet there was a significant increase in B-1b cells in Id3BKO. Consistent with these findings, ELISA (enzyme-linked immunoassay) demonstrated increases in skeletal muscle and plasma IgM. In vitro experiments demonstrated reduced proliferation and increased cell death when endothelial cells were treated with conditioned media from IgM-producing B-1b cells and tibialis anterior muscles in Id3BKO mice showed reduced density of total CD31+ and αSMA+CD31+ vessels. CONCLUSIONS This study is the first to demonstrate a role for B-cell-specific Id3 in maintaining blood flow recovery during HLI. Results suggest a role for Id3 in promoting blood flow during HLI and limiting IgM-expressing B-1b cell expansion. These findings present new mechanisms to investigate in peripheral artery disease pathogenesis.
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Affiliation(s)
- Victoria Osinski
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia 22908
- Department of Pathology, University of Virginia, Charlottesville, Virginia 22908
| | - Prasad Srikakulapu
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, Virginia 22908
| | - Young Min Haider
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, Virginia 22908
| | - Melissa A. Marshall
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, Virginia 22908
| | - Vijay C. Ganta
- Vascular Biology Center, Augusta University, Augusta, Georgia 30912
| | - Brian H. Annex
- Vascular Biology Center, Augusta University, Augusta, Georgia 30912
- Department of Medicine, Medical College of Georgia, Augusta University, Augusta, Georgia 30912
| | - Coleen A. McNamara
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia 22908
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, Virginia 22908
- Department of Medicine, Division of Cardiovascular Medicine, University of Virginia, Charlottesville, Virginia 22908
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18
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Hou Y, Li Y, Liu B, Wan H, Liu C, Xia W. nnResearch progress on B cells and thoracic aortic aneurysm/dissection. Ann Vasc Surg 2021; 82:377-382. [PMID: 34933111 DOI: 10.1016/j.avsg.2021.11.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 11/23/2021] [Accepted: 11/28/2021] [Indexed: 02/02/2023]
Abstract
Thoracic aortic aneurysm/dissection (TAAD) is a rare cardiovascular disease characterized by acute onset, rapid progression and high morbidity and mortality. One of the crucial factors leading to TAAD is the inflammatory response, which is regulated by many immune cell subgroups, including B cells. Compared with normal aortic tissue, the number of B cells in the aortic tissue of TAAD patients is significantly higher. Activated B cells participate in the vascular immune inflammatory response by producing antibodies and inflammatory factors and activating the complement system. These effects can lead to collagen degradation and aortic wall remodeling, both of which are the main pathologic characteristics of TAAD. Therefore, B cells play a key role in the occurrence and development of TAAD. B cells can be divided into B1 cells, B2 cells and regulatory B cells, which have different mechanisms of action in TAAD. This article will review the role of B cells in TAAD from the perspective of three different subtypes of B cells.
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Affiliation(s)
- Yue Hou
- Clinical laboratory diagnostics, Beihua University, China
| | - Yan Li
- Clinical laboratory diagnostics, Beihua University, China
| | - Bingqing Liu
- Clinical laboratory diagnostics, Beihua University, China
| | - Hong Wan
- Clinical laboratory diagnostics, Beihua University, China
| | - Chang Liu
- Clinical laboratory diagnostics, Beihua University, China.
| | - Wei Xia
- Clinical laboratory diagnostics, Beihua University, China.
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19
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Li B, Song X, Guo W, Hou Y, Hu H, Ge W, Fan T, Han Z, Li Z, Yang P, Gao R, Zhao H, Wang J. Single-Cell Transcriptome Profiles Reveal Fibrocytes as Potential Targets of Cell Therapies for Abdominal Aortic Aneurysm. Front Cardiovasc Med 2021; 8:753711. [PMID: 34901214 PMCID: PMC8652037 DOI: 10.3389/fcvm.2021.753711] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 10/22/2021] [Indexed: 11/13/2022] Open
Abstract
Abdominal aortic aneurysm (AAA) is potentially life-threatening in aging population due to the risk of aortic rupture and a lack of optimal treatment. The roles of different vascular and immune cells in AAA formation and pathogenesis remain to be future characterized. Single-cell RNA sequencing was performed on an angiotensin (Ang) II-induced mouse model of AAA. Macrophages, B cells, T cells, fibroblasts, smooth muscle cells and endothelial cells were identified through bioinformatic analyses. The discovery of multiple subtypes of macrophages, such as the re-polarization of Trem2+Acp5+ osteoclast-like and M2-like macrophages toward the M1 type macrophages, indicates the heterogenous nature of macrophages during AAA development. More interestingly, we defined CD45+COL1+ fibrocytes, which was further validated by flow cytometry and immunostaining in mouse and human AAA tissues. We then reconstituted these fibrocytes into mice with Ang II-induced AAA and found the recruitment of these fibrocytes in mouse AAA. More importantly, the fibrocyte treatment exhibited a protective effect against AAA development, perhaps through modulating extracellular matrix production and thus enhancing aortic stability. Our study reveals the heterogeneity of macrophages and the involvement of a novel cell type, fibrocyte, in AAA. Fibrocyte may represent a potential cell therapy target for AAA.
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Affiliation(s)
- Bolun Li
- State Key Laboratory of Medical Molecular Biology, Department of Pathophysiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Xiaomin Song
- State Key Laboratory of Medical Molecular Biology, Department of Pathophysiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Wenjun Guo
- State Key Laboratory of Medical Molecular Biology, Department of Pathophysiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Yangfeng Hou
- State Key Laboratory of Medical Molecular Biology, Department of Pathophysiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Huiyuan Hu
- State Key Laboratory of Medical Molecular Biology, Department of Pathophysiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China.,First Clinical College, Xi'an Jiaotong University, ShaanXi, China
| | - Weipeng Ge
- State Key Laboratory of Medical Molecular Biology, Department of Pathophysiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Tianfei Fan
- State Key Laboratory of Medical Molecular Biology, Department of Pathophysiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Zhifa Han
- State Key Laboratory of Medical Molecular Biology, Department of Pathophysiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China.,Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - Zhiwei Li
- State Key Laboratory of Medical Molecular Biology, Department of Pathophysiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Peiran Yang
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Ran Gao
- State Key Laboratory of Medical Molecular Biology, Department of Pathophysiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Hongmei Zhao
- State Key Laboratory of Medical Molecular Biology, Department of Pathophysiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Jing Wang
- State Key Laboratory of Medical Molecular Biology, Department of Pathophysiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
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20
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Meng J, Wen H, Li X, Luan B, Gong S, Wen J, Wang Y, Wang L. POU class 2 homeobox associating factor 1 (POU2AF1) participates in abdominal aortic aneurysm enlargement based on integrated bioinformatics analysis. Bioengineered 2021; 12:8980-8993. [PMID: 34637689 PMCID: PMC8806937 DOI: 10.1080/21655979.2021.1990822] [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] [Indexed: 11/16/2022] Open
Abstract
Abdominal aortic aneurysm (AAA) is life-threatening, its natural course is progressively sac expansion and rupture. Elegant studies have been conducted to investigate the molecular markers associated with AAA growth and expansion, this topic however, still needs to be further elucidated. This study aimed to identify potential genes for AAA growth and expansion based on comprehensive bioinformatics approaches. Firstly, 29 up-regulated genes were identified through DEGs analysis between large AAA and small AAA in GSE57691. Secondly, signed WGCNA analysis was conducted based on GSE57691 and the green module was found to exhibit the topmost correlation with large AAA as well as AAA, 133 WGCNA hub genes were further identified. Merged gene set including 29 up-regulated DEGs and 858 green module genes was subjected to constructing a PPI network where 195 PPI hub genes were identified. Subsequently, 4 crucial genes including POU2AF1, FCRLA, CD79B, HLA-DOB were recognized by Venn plot. In addition, by using GSE7084 and GSE98278 for verification, POU2AF1 showed potential diagnostic value between AAA and normal groups, and exhibited a significant higher expression level in large AAA samples compared with small AAA samples. Furthermore, immunohistochemistry results indicated up-regulation of POU2AF1 in large AAA samples than small AAA samples, which implies POU2AF1 may be a key regulator in AAA enlargement and growth. In summary, this study indicates that POU2AF1 has great predictive value for the expansion of AAA, and may contribute to the further exploration of pathogenesis and progression of AAA.
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Affiliation(s)
- Jinze Meng
- Department of Pharmacology, China Medical University, Shenyang, China
| | - Hao Wen
- Department of Trauma Center, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Xintong Li
- Department of Vascular Surgery, The First Affiliated Hospital of China Medical University, Shenyang, China.,Key Laboratory of Pathogenesis, Prevention and Therapeutics of Aortic Aneurysm in Liaoning Province, Shenyang, China
| | - Boyang Luan
- Department of Trauma Center, The First Affiliated Hospital of China Medical University, Shenyang, China
| | - Shiqiang Gong
- Department of Pharmacology, China Medical University, Shenyang, China
| | - Jie Wen
- Department of Ultrasonography, Inner Mongolia Baotou City Central Hospital, Baotou, China
| | - Yifei Wang
- Department of Pharmacology, China Medical University, Shenyang, China
| | - Lei Wang
- Department of Vascular Surgery, The First Affiliated Hospital of China Medical University, Shenyang, China.,Key Laboratory of Pathogenesis, Prevention and Therapeutics of Aortic Aneurysm in Liaoning Province, Shenyang, China
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21
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Ramprasath T, Han YM, Zhang D, Yu CJ, Zou MH. Tryptophan Catabolism and Inflammation: A Novel Therapeutic Target For Aortic Diseases. Front Immunol 2021; 12:731701. [PMID: 34630411 PMCID: PMC8496902 DOI: 10.3389/fimmu.2021.731701] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 09/03/2021] [Indexed: 12/14/2022] Open
Abstract
Aortic diseases are the primary public health concern. As asymptomatic diseases, abdominal aortic aneurysm (AAA) and atherosclerosis are associated with high morbidity and mortality. The inflammatory process constitutes an essential part of a pathogenic cascade of aortic diseases, including atherosclerosis and aortic aneurysms. Inflammation on various vascular beds, including endothelium, smooth muscle cell proliferation and migration, and inflammatory cell infiltration (monocytes, macrophages, neutrophils, etc.), play critical roles in the initiation and progression of aortic diseases. The tryptophan (Trp) metabolism or kynurenine pathway (KP) is the primary way of degrading Trp in most mammalian cells, disturbed by cytokines under various stress. KP generates several bioactive catabolites, such as kynurenine (Kyn), kynurenic acid (KA), 3-hydroxykynurenine (3-HK), etc. Depends on the cell types, these metabolites can elicit both hyper- and anti-inflammatory effects. Accumulating evidence obtained from various animal disease models indicates that KP contributes to the inflammatory process during the development of vascular disease, notably atherosclerosis and aneurysm development. This review outlines current insights into how perturbed Trp metabolism instigates aortic inflammation and aortic disease phenotypes. We also briefly highlight how targeting Trp metabolic pathways should be considered for treating aortic diseases.
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Affiliation(s)
- Tharmarajan Ramprasath
- Center for Molecular and Translational Medicine, Georgia State University, Atlanta, GA, United States
| | - Young-Min Han
- Center for Molecular and Translational Medicine, Georgia State University, Atlanta, GA, United States
| | - Donghong Zhang
- Center for Molecular and Translational Medicine, Georgia State University, Atlanta, GA, United States
| | - Chang-Jiang Yu
- Center for Molecular and Translational Medicine, Georgia State University, Atlanta, GA, United States
| | - Ming-Hui Zou
- Center for Molecular and Translational Medicine, Georgia State University, Atlanta, GA, United States
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22
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Sun P, Zhang L, Gu Y, Wei S, Wang Z, Li M, Wang W, Wang Z, Bai H. Immune checkpoint programmed death-1 mediates abdominal aortic aneurysm and pseudoaneurysm progression. Biomed Pharmacother 2021; 142:111955. [PMID: 34339918 DOI: 10.1016/j.biopha.2021.111955] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 07/18/2021] [Accepted: 07/20/2021] [Indexed: 12/20/2022] Open
Abstract
PURPOSE The causes and pathogenetic mechanisms underlying abdominal aortic aneurysms (AAAs) and pseudoaneurysms are not fully understood. We hypothesized that inhibiting programmed death-1 (PD-1) can decrease AAA and pseudoaneurysm formation in mouse and rat models. METHODS Human AAA samples were examined in conjunction with an adventitial calcium chloride (CaCl2) application mouse model and an aortic patch angioplasty rat model. Single-dose PD-1 antibody (4 mg/kg) or BMS-1 (PD-1 inhibitor-1) (1 mg/kg) was administered by intraperitoneal (IP) or intraluminal injection. In the intramural injection group, PD-1 antibody was injected after CaCl2 incubation. The rats were divided into three groups: (1) the control group was only decellularized without other special treatment, (2) the PD-1 antibody-coated patch group, and (3) the BMS-1 coated patch group. Patches implanted in the rat abdominal aorta were harvested on day 14 after implantation and analyzed. RESULTS Immunohistochemical analysis showed PD-1-positive cells, PD-1 and CD3, PD-1 and CD68, and PD-1 and α-actin co-expressed in the human AAA samples. Intraperitoneal (IP) injection or intraluminal injection of PD-1antibody/BMS-1 significantly inhibited AAA progression. PD-1 antibody and BMS-1 were each successfully conjugated to decellularized rat thoracic artery patches, respectively, by hyaluronic acid. Patches coated with either humanized PD-1 antibody or BMS-1 can also inhibit pseudoaneurysm progression and inflammatory cell infiltration. CONCLUSION PD-1 pathway inhibition may be a promising therapeutic strategy for inhibiting AAA and pseudoaneurysm progression.
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MESH Headings
- Aneurysm, False/drug therapy
- Aneurysm, False/metabolism
- Aneurysm, False/pathology
- Angioplasty/methods
- Animals
- Antibodies, Monoclonal, Humanized/pharmacology
- Antibodies, Monoclonal, Humanized/therapeutic use
- Aortic Aneurysm, Abdominal/drug therapy
- Aortic Aneurysm, Abdominal/metabolism
- Aortic Aneurysm, Abdominal/pathology
- B7-H1 Antigen/antagonists & inhibitors
- B7-H1 Antigen/metabolism
- Calcium Chloride/toxicity
- Coated Materials, Biocompatible/pharmacology
- Coated Materials, Biocompatible/therapeutic use
- Disease Models, Animal
- Disease Progression
- Humans
- Immune Checkpoint Inhibitors/pharmacology
- Immune Checkpoint Inhibitors/therapeutic use
- Injections, Intraperitoneal
- Lymphocytes/immunology
- Macrophages/immunology
- Male
- Mice
- Programmed Cell Death 1 Receptor/antagonists & inhibitors
- Programmed Cell Death 1 Receptor/immunology
- Programmed Cell Death 1 Receptor/metabolism
- Rats, Sprague-Dawley
- Rats
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Affiliation(s)
- Peng Sun
- Department of Vascular and Endovascular Surgery, First Affiliated Hospital of Zhengzhou University, 450052 Henan, China
| | - Liwei Zhang
- Department of Vascular and Endovascular Surgery, First Affiliated Hospital of Zhengzhou University, 450052 Henan, China
| | - Yulei Gu
- Emergency Intensive Care Unit, The First Affiliated Hospital of Zhengzhou University, 450052 Henan, China
| | - Shunbo Wei
- Department of Vascular and Endovascular Surgery, First Affiliated Hospital of Zhengzhou University, 450052 Henan, China
| | - Zhiwei Wang
- Department of Vascular and Endovascular Surgery, First Affiliated Hospital of Zhengzhou University, 450052 Henan, China
| | - Mingxing Li
- Department of Vascular and Endovascular Surgery, First Affiliated Hospital of Zhengzhou University, 450052 Henan, China
| | - Wang Wang
- Key Vascular Physiology and Applied Research Laboratory of Zhengzhou City, 450002 Henan, China; Department of Physiology, Medical School of Zhengzhou University, 450002 Henan, China
| | - Zhiju Wang
- Department of Physiology, Medical School of Zhengzhou University, 450002 Henan, China
| | - Hualong Bai
- Department of Vascular and Endovascular Surgery, First Affiliated Hospital of Zhengzhou University, 450052 Henan, China; Key Vascular Physiology and Applied Research Laboratory of Zhengzhou City, 450002 Henan, China.
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23
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Rodríguez-Carrio J, Cerro-Pardo I, Lindholt JS, Bonzon-Kulichenko E, Martínez-López D, Roldán-Montero R, Escolà-Gil JC, Michel JB, Blanco-Colio LM, Vázquez J, Suárez A, Martín-Ventura JL. Malondialdehyde-modified HDL particles elicit a specific IgG response in abdominal aortic aneurysm. Free Radic Biol Med 2021; 174:171-181. [PMID: 34364980 DOI: 10.1016/j.freeradbiomed.2021.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/22/2021] [Accepted: 08/04/2021] [Indexed: 11/19/2022]
Abstract
High Density Lipoprotein (HDL) plays a protective role in abdominal aortic aneurysm (AAA); however, recent findings suggest that oxidative modifications could lead to dysfunctional HDL in AAA. This study aimed at testing the effect of oxidized HDL on aortic lesions and humoral immune responses in a mouse model of AAA induced by elastase, and evaluating whether antibodies against modified HDL can be found in AAA patients. HDL particles were oxidized with malondialdehyde (HDL-MDA) and the changes were studied by biochemical and proteomics approaches. Experimental AAA was induced in mice by elastase perfusion and then mice were treated with HDL-MDA, HDL or vehicle for 14 days. Aortic lesions were studied by histomorphometric analysis. Levels of anti-HDL-MDA IgG antibodies were measured by an in-house immunoassay in the mouse model, in human tissue-supernatants and in plasma samples from the VIVA cohort. HDL oxidation with MDA was confirmed by enhanced susceptibility to diene formation. Proteomics demonstrated the presence of MDA adducts on Lysine residues of HDL proteins, mainly ApoA-I. MDA-modification of HDL abrogated the protective effect of HDL on cultured endothelial cells as well as on AAA dilation in mice. Exposure to HDL-MDA elicited an anti-HDL-MDA IgG response in mice. Anti-HDL-MDA were also detected in tissue-conditioned media from AAA patients, mainly in intraluminal thrombus. Higher plasma levels of anti-HDL-MDA IgG antibodies were found in AAA patients compared to controls. Anti-HDL-MDA levels were associated with smoking and were independent predictors of overall mortality in AAA patients. Overall, MDA-oxidized HDL trigger a specific humoral immune response in mice. Besides, antibodies against HDL-MDA can be detected in tissue and plasma of AAA patients, suggesting its potential use as surrogate stable biomarkers of oxidative stress in AAA.
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Affiliation(s)
- Javier Rodríguez-Carrio
- Area of Immunology, University of Oviedo, Instituto de Salud Del Principado de Asturias (ISPA), Oviedo, Asturias, Spain
| | | | - Jes S Lindholt
- Department of Cardiothoracic and Vascular Surgery, Odense University Hospital, Odense, Denmark
| | - Elena Bonzon-Kulichenko
- Laboratorio de Proteómica Cardiovascular, CNIC, Madrid, Spain; CIBER de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | | | | | - Joan-Carles Escolà-Gil
- Institut de Investigació Biomédica Sant Pau, Spain; CIBER de Diabetes y Enfermedades Metabólicas (CIBERDEM), Barcelona, Spain
| | | | - Luis Miguel Blanco-Colio
- IIS-Fundación Jiménez-Díaz, Madrid, Spain; CIBER de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Jesús Vázquez
- Laboratorio de Proteómica Cardiovascular, CNIC, Madrid, Spain; CIBER de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Ana Suárez
- Area of Immunology, University of Oviedo, Instituto de Salud Del Principado de Asturias (ISPA), Oviedo, Asturias, Spain
| | - José Luis Martín-Ventura
- IIS-Fundación Jiménez-Díaz, Madrid, Spain; CIBER de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain.
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24
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Spinosa MD, Montgomery WG, Lempicki M, Srikakulapu P, Johnsrude MJ, McNamara CA, Upchurch GR, Ailawadi G, Leitinger N, Meher AK. B Cell-Activating Factor Antagonism Attenuates the Growth of Experimental Abdominal Aortic Aneurysm. THE AMERICAN JOURNAL OF PATHOLOGY 2021; 191:2231-2244. [PMID: 34509440 DOI: 10.1016/j.ajpath.2021.08.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 08/02/2021] [Accepted: 08/20/2021] [Indexed: 10/20/2022]
Abstract
B cell-activating factor (BAFF), a tumor necrosis factor family of cytokine, was recently identified as a regulator of atherosclerosis; however, its role in aortic aneurysm has not been determined. Here, we examined the effect of selective BAFF antagonism using an anti-BAFF antibody (blocks binding of BAFF to receptors BAFF receptor 3, transmembrane activator and CAML interactor, and B-cell maturation antigen) and mBaffR-mFc (blocks binding of BAFF to BAFF receptor 3) on a murine model of abdominal aortic aneurysm (AAA). In a prevention strategy, the antagonists were injected before the induction of AAA, and in an intervention strategy, the antagonists were injected after the induction of AAA. Both strategies attenuated the formation of AAA. In the intervention group, BAFF antagonism depleted most of the mature B-cell subsets in spleen and circulation, leading to enhanced resolution of inflammation in AAA as indicated by decreased infiltration of B cells and proinflammatory macrophages and a reduced number of apoptotic cells. In AAA tissues, B cells and macrophages were found in close contact. In vitro, B cells, irrespective of treatment with BAFF, impaired the efferocytosis activity of macrophages, suggesting a direct innate role of B cells on macrophage function. Altogether, BAFF antagonism affects survival of the mature B cells, promotes resolution of inflammation in the aorta, and attenuates the growth of AAA in mice.
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Affiliation(s)
- Michael D Spinosa
- Department of Surgery, University of Virginia, Charlottesville, Virginia
| | | | - Melissa Lempicki
- Department of Microbiology and Immunology, East Carolina University, Greenville, North Carolina
| | - Prasad Srikakulapu
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia
| | - Matthew J Johnsrude
- Department of Microbiology and Immunology, East Carolina University, Greenville, North Carolina
| | - Coleen A McNamara
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia
| | - Gilbert R Upchurch
- Department of Surgery, University of Virginia, Charlottesville, Virginia
| | - Gorav Ailawadi
- Department of Surgery, University of Virginia, Charlottesville, Virginia
| | - Norbert Leitinger
- Department of Pharmacology, University of Virginia, Charlottesville, Virginia
| | - Akshaya K Meher
- Department of Microbiology and Immunology, East Carolina University, Greenville, North Carolina; Department of Pharmacology, University of Virginia, Charlottesville, Virginia.
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25
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Shao F, Miao Y, Zhang Y, Han L, Ma X, Deng J, Jiang C, Kong W, Xu Q, Feng J, Wang X. B cell-derived anti-beta 2 glycoprotein I antibody contributes to hyperhomocysteinaemia-aggravated abdominal aortic aneurysm. Cardiovasc Res 2021; 116:1897-1909. [PMID: 31782769 DOI: 10.1093/cvr/cvz288] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 08/09/2019] [Accepted: 11/27/2019] [Indexed: 01/29/2023] Open
Abstract
AIMS Overactivated B cells secrete pathological antibodies, which in turn accelerate the formation of abdominal aortic aneurysms (AAAs). Hyperhomocysteinaemia (HHcy) aggravates AAA in mice; however, the underlying mechanisms remain largely elusive. In this study, we further investigated whether homocysteine (Hcy)-activated B cells produce antigen-specific antibodies that ultimately contribute to AAA formation. METHODS AND RESULTS ELISA assays showed that HHcy induced the secretion of anti-beta 2 glycoprotein I (anti-β2GPI) antibody from B cells both in vitro and in vivo. Mechanistically, Hcy increased the accumulation of various lipid metabolites in B cells tested by liquid chromatography-tandem mass spectrometry, which contributed to elevated anti-β2GPI IgG secretion. By using the toll-like receptor 4 (TLR4)-specific inhibitor TAK-242 or TLR4-deficient macrophages, we found that culture supernatants from Hcy-activated B cells and HHcy plasma IgG polarized inflammatory macrophages in a TLR4-dependent manner. In addition, HHcy markedly increased the incidence of elastase- and CaPO4-induced AAA in male BALB/c mice, which was prevented in μMT mice. To further determine the importance of IgG in HHcy-aggravated AAA formation, we purified plasma IgG from HHcy or control mice and then transferred the IgG into μMT mice, which were subsequently subjected to elastase- or CaPO4-induced AAA. Compared with μMT mice that received plasma IgG from control mice, μMT mice that received HHcy plasma IgG developed significantly exacerbated elastase- or CaPO4-induced AAA accompanied by increased elastin degradation, MMP2/9 expression, and anti-β2GPI IgG deposition in vascular lesions, as shown by immunofluorescence histochemical staining. CONCLUSION Our findings reveal a novel mechanism by which Hcy-induced B cell-derived pathogenic anti-β2GPI IgG might, at least in part, contribute to HHcy-aggravated chronic vascular inflammation and AAA formation.
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Affiliation(s)
- Fangyu Shao
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, 38 Xueyuan Road, Beijing 100191, China
| | - Yutong Miao
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, 38 Xueyuan Road, Beijing 100191, China
| | - Yan Zhang
- Department of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - Lulu Han
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, 38 Xueyuan Road, Beijing 100191, China
| | - Xiaolong Ma
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, 38 Xueyuan Road, Beijing 100191, China
| | - Jiacheng Deng
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, 38 Xueyuan Road, Beijing 100191, China
| | - Changtao Jiang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, 38 Xueyuan Road, Beijing 100191, China
| | - Wei Kong
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, 38 Xueyuan Road, Beijing 100191, China
| | - Qingbo Xu
- Cardiovascular Division, Cardiology Department, BHF Center for Vascular Regeneration, King's College London, London, UK
| | - Juan Feng
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, 38 Xueyuan Road, Beijing 100191, China
| | - Xian Wang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, 38 Xueyuan Road, Beijing 100191, China
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26
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Abstract
B cells are traditionally known for their ability to produce antibodies in the context of adaptive immune responses. However, over the last decade B cells have been increasingly recognized as modulators of both adaptive and innate immune responses, as well as players in an important role in the pathogenesis of a variety of human diseases. Here, after briefly summarizing our current understanding of B cell biology, we present a systematic review of the literature from both animal models and human studies that highlight the important role that B lymphocytes play in cardiac and vascular disease. While many aspects of B cell biology in the vasculature and, to an even greater extent, in the heart remain unclear, B cells are emerging as key regulators of cardiovascular adaptation to injury.
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Affiliation(s)
- Luigi Adamo
- Center for Cardiovascular Research, Cardiovascular Division, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri 63110, USA; , ,
| | - Cibele Rocha-Resende
- Center for Cardiovascular Research, Cardiovascular Division, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri 63110, USA; , ,
| | - Douglas L Mann
- Center for Cardiovascular Research, Cardiovascular Division, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri 63110, USA; , ,
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27
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Deroissart J, Porsch F, Koller T, Binder CJ. Anti-inflammatory and Immunomodulatory Therapies in Atherosclerosis. Handb Exp Pharmacol 2021; 270:359-404. [PMID: 34251531 DOI: 10.1007/164_2021_505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Hypercholesterolemia is a major risk factor in atherosclerosis development and lipid-lowering drugs (i.e., statins) remain the treatment of choice. Despite effective reduction of LDL cholesterol in patients, a residual cardiovascular risk persists in some individuals, highlighting the need for further therapeutic intervention. Recently, the CANTOS trial paved the way toward the development of specific therapies targeting inflammation, a key feature in atherosclerosis progression. The pre-existence of multiple drugs modulating both innate and adaptive immune responses has significantly accelerated the number of translational studies applying these drugs to atherosclerosis. Additional preclinical research has led to the discovery of new therapeutic targets, offering promising perspectives for the treatment and prevention of atherosclerosis. Currently, both drugs with selective targeting and broad unspecific anti-inflammatory effects have been tested. In this chapter, we aim to give an overview of current advances in immunomodulatory treatment approaches for atherosclerotic cardiovascular diseases.
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Affiliation(s)
- Justine Deroissart
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Florentina Porsch
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Thomas Koller
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Christoph J Binder
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria.
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28
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Lopez‐Sanz L, Bernal S, Jimenez‐Castilla L, Prieto I, La Manna S, Gomez‐Lopez S, Blanco‐Colio LM, Egido J, Martin‐Ventura JL, Gomez‐Guerrero C. Fcγ receptor activation mediates vascular inflammation and abdominal aortic aneurysm development. Clin Transl Med 2021; 11:e463. [PMID: 34323424 PMCID: PMC8255062 DOI: 10.1002/ctm2.463] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 05/24/2021] [Accepted: 05/30/2021] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Abdominal aortic aneurysm (AAA), a degenerative vascular pathology characterized by permanent dilation of the aorta, is considered a chronic inflammatory disease involving innate/adaptive immunity. However, the functional role of antibody-dependent immune response against antigens present in the damaged vessel remains unresolved. We hypothesized that engagement of immunoglobulin G (IgG) Fc receptors (FcγR) by immune complexes (IC) in the aortic wall contributes to AAA development. We therefore evaluated FcγR expression in AAA lesions and analysed whether inhibition of FcγR signaling molecules (γ-chain and Syk kinase) influences AAA formation in mice. METHODS FcγR gene/protein expression was assessed in human and mouse AAA tissues. Experimental AAA was induced by aortic elastase perfusion in wild-type (WT) mice and γ-chain knockout (γKO) mice (devoid of activating FcγR) in combination with macrophage adoptive transfer or Syk inhibitor treatment. To verify the mechanisms of FcγR in vitro, vascular smooth muscle cells (VSMC) and macrophages were stimulated with IgG IC. RESULTS FcγR overexpression was detected in adventitia and media layers of human and mouse AAA. Elastase-perfused γKO mice exhibited a decrease in AAA incidence, aortic dilation, elastin degradation, and VSMC loss. This was associated with (1) reduced infiltrating leukocytes and immune deposits in AAA lesions, (2) inflammatory genes and metalloproteinases downregulation, (3) redox balance restoration, and (4) converse phenotype of anti-inflammatory macrophage M2 and contractile VSMC. Adoptive transfer of FcγR-expressing macrophages aggravated aneurysm in γKO mice. In vitro, FcγR deficiency attenuated inflammatory gene expression, oxidative stress, and phenotypic switch triggered by IC. Additionally, Syk inhibition prevented IC-mediated cell responses, reduced inflammation, and mitigated AAA formation. CONCLUSION Our findings provide insight into the role and mechanisms mediating IgG-FcγR-associated inflammation and aortic wall injury in AAA, which might represent therapeutic targets against AAA disease.
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MESH Headings
- Animals
- Antigen-Antibody Complex/adverse effects
- Aorta, Abdominal/metabolism
- Aorta, Abdominal/pathology
- Aortic Aneurysm, Abdominal/pathology
- Aortic Aneurysm, Abdominal/prevention & control
- Disease Models, Animal
- Humans
- Immunoglobulin gamma-Chains/genetics
- Immunoglobulin gamma-Chains/metabolism
- Inflammation/metabolism
- Inflammation/pathology
- Macrophages/cytology
- Macrophages/immunology
- Macrophages/metabolism
- Male
- Matrix Metalloproteinases/genetics
- Matrix Metalloproteinases/metabolism
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/metabolism
- Niacinamide/analogs & derivatives
- Niacinamide/therapeutic use
- Oxidative Stress
- Pancreatic Elastase/adverse effects
- Pyrimidines/therapeutic use
- Receptors, IgG/genetics
- Receptors, IgG/metabolism
- Syk Kinase/antagonists & inhibitors
- Syk Kinase/metabolism
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Affiliation(s)
- Laura Lopez‐Sanz
- Renal, Vascular and Diabetes Research LabIIS‐Fundacion Jimenez Diaz (IIS‐FJD)MadridSpain
- Universidad Autonoma de Madrid (UAM)MadridSpain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM)MadridSpain
| | - Susana Bernal
- Renal, Vascular and Diabetes Research LabIIS‐Fundacion Jimenez Diaz (IIS‐FJD)MadridSpain
- Universidad Autonoma de Madrid (UAM)MadridSpain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM)MadridSpain
| | - Luna Jimenez‐Castilla
- Renal, Vascular and Diabetes Research LabIIS‐Fundacion Jimenez Diaz (IIS‐FJD)MadridSpain
- Universidad Autonoma de Madrid (UAM)MadridSpain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM)MadridSpain
| | - Ignacio Prieto
- Renal, Vascular and Diabetes Research LabIIS‐Fundacion Jimenez Diaz (IIS‐FJD)MadridSpain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM)MadridSpain
| | - Sara La Manna
- Renal, Vascular and Diabetes Research LabIIS‐Fundacion Jimenez Diaz (IIS‐FJD)MadridSpain
- Universidad Autonoma de Madrid (UAM)MadridSpain
| | | | - Luis Miguel Blanco‐Colio
- Renal, Vascular and Diabetes Research LabIIS‐Fundacion Jimenez Diaz (IIS‐FJD)MadridSpain
- Spanish Biomedical Research Centre in Cardiovascular Diseases (CIBERCV)MadridSpain
| | - Jesus Egido
- Renal, Vascular and Diabetes Research LabIIS‐Fundacion Jimenez Diaz (IIS‐FJD)MadridSpain
- Universidad Autonoma de Madrid (UAM)MadridSpain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM)MadridSpain
| | - Jose Luis Martin‐Ventura
- Renal, Vascular and Diabetes Research LabIIS‐Fundacion Jimenez Diaz (IIS‐FJD)MadridSpain
- Universidad Autonoma de Madrid (UAM)MadridSpain
- Spanish Biomedical Research Centre in Cardiovascular Diseases (CIBERCV)MadridSpain
| | - Carmen Gomez‐Guerrero
- Renal, Vascular and Diabetes Research LabIIS‐Fundacion Jimenez Diaz (IIS‐FJD)MadridSpain
- Universidad Autonoma de Madrid (UAM)MadridSpain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM)MadridSpain
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29
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Cooper HA, Cicalese S, Preston KJ, Kawai T, Okuno K, Choi ET, Kasahara S, Uchida HA, Otaka N, Scalia R, Rizzo V, Eguchi S. Targeting mitochondrial fission as a potential therapeutic for abdominal aortic aneurysm. Cardiovasc Res 2021; 117:971-982. [PMID: 32384150 PMCID: PMC7898955 DOI: 10.1093/cvr/cvaa133] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 04/15/2020] [Accepted: 04/30/2020] [Indexed: 11/12/2022] Open
Abstract
AIMS Angiotensin II (AngII) is a potential contributor to the development of abdominal aortic aneurysm (AAA). In aortic vascular smooth muscle cells (VSMCs), exposure to AngII induces mitochondrial fission via dynamin-related protein 1 (Drp1). However, pathophysiological relevance of mitochondrial morphology in AngII-associated AAA remains unexplored. Here, we tested the hypothesis that mitochondrial fission is involved in the development of AAA. METHODS AND RESULTS Immunohistochemistry was performed on human AAA samples and revealed enhanced expression of Drp1. In C57BL6 mice treated with AngII plus β-aminopropionitrile, AAA tissue also showed an increase in Drp1 expression. A mitochondrial fission inhibitor, mdivi1, attenuated AAA size, associated aortic pathology, Drp1 protein induction, and mitochondrial fission but not hypertension in these mice. Moreover, western-blot analysis showed that induction of matrix metalloproteinase-2, which precedes the development of AAA, was blocked by mdivi1. Mdivi1 also reduced the development of AAA in apolipoprotein E-deficient mice infused with AngII. As with mdivi1, Drp1+/- mice treated with AngII plus β-aminopropionitrile showed a decrease in AAA compared to control Drp1+/+ mice. In abdominal aortic VSMCs, AngII induced phosphorylation of Drp1 and mitochondrial fission, the latter of which was attenuated with Drp1 silencing as well as mdivi1. AngII also induced vascular cell adhesion molecule-1 expression and enhanced leucocyte adhesion and mitochondrial oxygen consumption in smooth muscle cells, which were attenuated with mdivi1. CONCLUSION These data indicate that Drp1 and mitochondrial fission play salient roles in AAA development, which likely involves mitochondrial dysfunction and inflammatory activation of VSMCs.
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MESH Headings
- Aminopropionitrile
- Angiotensin II
- Animals
- Anti-Inflammatory Agents/pharmacology
- Aorta, Abdominal/drug effects
- Aorta, Abdominal/metabolism
- Aorta, Abdominal/pathology
- Aortic Aneurysm, Abdominal/chemically induced
- Aortic Aneurysm, Abdominal/metabolism
- Aortic Aneurysm, Abdominal/pathology
- Aortic Aneurysm, Abdominal/prevention & control
- Case-Control Studies
- Cell Adhesion/drug effects
- Cells, Cultured
- Disease Models, Animal
- Dynamins/genetics
- Dynamins/metabolism
- Humans
- Leukocytes/drug effects
- Leukocytes/metabolism
- Male
- Mice, Inbred C57BL
- Mice, Knockout, ApoE
- Mitochondria, Muscle/drug effects
- Mitochondria, Muscle/genetics
- Mitochondria, Muscle/metabolism
- Mitochondria, Muscle/pathology
- Mitochondrial Dynamics/drug effects
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/pathology
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- Myocytes, Smooth Muscle/pathology
- Oxygen Consumption/drug effects
- Phosphorylation
- Quinazolinones/pharmacology
- Mice
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Affiliation(s)
- Hannah A Cooper
- Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Stephanie Cicalese
- Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Kyle J Preston
- Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Tatsuo Kawai
- Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Keisuke Okuno
- Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Eric T Choi
- Department of Surgery, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Shingo Kasahara
- Department of Cardiovascular Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Haruhito A Uchida
- Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Nozomu Otaka
- Department of Nephrology, Rheumatology, Endocrinology and Metabolism, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama 700-8558, Japan
| | - Rosario Scalia
- Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Victor Rizzo
- Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Satoru Eguchi
- Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
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30
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Yuan Z, Lu Y, Wei J, Wu J, Yang J, Cai Z. Abdominal Aortic Aneurysm: Roles of Inflammatory Cells. Front Immunol 2021; 11:609161. [PMID: 33613530 PMCID: PMC7886696 DOI: 10.3389/fimmu.2020.609161] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 12/18/2020] [Indexed: 12/14/2022] Open
Abstract
Abdominal aortic aneurysms (AAAs) are local dilations of infrarenal segment of aortas. Molecular mechanisms underlying the pathogenesis of AAA remain not fully clear. However, inflammation has been considered as a central player in the development of AAA. In the past few decades, studies demonstrated a host of inflammatory cells, including T cells, macrophages, dendritic cells, neutrophils, B cells, and mast cells, etc. infiltrating into aortic walls, which implicated their crucial roles. In addition to direct cell contacts and cytokine or protease secretions, special structures like inflammasomes and neutrophil extracellular traps have been investigated to explore their functions in aneurysm formation. The above-mentioned inflammatory cells and associated structures may initiate and promote AAA expansion. Understanding their impacts and interaction networks formation is meaningful to develop new strategies of screening and pharmacological interventions for AAA. In this review, we aim to discuss the roles and mechanisms of these inflammatory cells in AAA pathogenesis.
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Affiliation(s)
- Zhen Yuan
- Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yi Lu
- Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jia Wei
- Department of Urology, Children's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jiaqi Wu
- Translational Medicine Center, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China
| | - Jin Yang
- Translational Medicine Center, The Affiliated Hospital of Hangzhou Normal University, Hangzhou, China.,Institute of Hepatology and Metabolic Diseases, Hangzhou Normal University, Hangzhou, China
| | - Zhejun Cai
- Department of Cardiology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Jiaxing Key Laboratory of Cardiac Rehabilitation, Jiaxing, China
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Yoshizawa H, Kobayashi K, Kataoka M, Kameda I, Maeda H, Sakurai K, Ohta-Ogo K, Hatakeyama K, Yoshida KI. Sudden death of a middle-aged woman with congenital heart disease presented macroscopic and microscopic pulmonary artery aneurysm and dissection with thrombosis: A case report. HUMAN PATHOLOGY: CASE REPORTS 2020. [DOI: 10.1016/j.ehpc.2020.200455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Dalman RL, Lu Y, Mahaffey KW, Chase AJ, Stern JR, Chang RW. Background and Proposed Design for a Metformin Abdominal Aortic Aneurysm Suppression Trial. VASCULAR AND ENDOVASCULAR REVIEW 2020. [DOI: 10.15420/ver.2020.03] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Abdominal aortic aneurysm (AAA) may lead to rupture and death if left untreated. While endovascular or surgical repair is generally recommended for AAA greater than 5–5.5 cm, the vast majority of aneurysms detected by screening modalities are smaller than this threshold. Once discovered, there would be a significant potential benefit in suppressing the growth of these small aneurysms in order to obviate the need for repair and mitigate rupture risk. Patients with diabetes, in particular those taking the oral hypoglycaemic medication metformin, have been shown to have lower incidence, growth rate, and rupture risk of AAA. Metformin therefore represents a widely available, non-toxic, potential inhibitor of AAA growth, but thus far no prospective clinical studies have evaluated this. Here, we present the background, rationale, and design for a randomised, double-blind, placebo-controlled clinical trial of metformin for growth suppression in patients with small AAA.
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Affiliation(s)
- Ronald L Dalman
- Department of Surgery, Division of Vascular and Endovascular Surgery, Stanford University School of Medicine, Stanford, California, US
| | - Ying Lu
- Department of Biomedical Data Science, Stanford University School of Medicine, Stanford, California, US
| | - Kenneth W Mahaffey
- Department of Medicine, Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, California, US
| | - Amanda J Chase
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, California, US
| | - Jordan R Stern
- Department of Surgery, Division of Vascular and Endovascular Surgery, Stanford University School of Medicine, Stanford, California, US
| | - Robert W Chang
- Department of Vascular Surgery, Kaiser Permanente San Francisco, California, US
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Depletion of CD11c+ dendritic cells in apolipoprotein E-deficient mice limits angiotensin II-induced abdominal aortic aneurysm formation and growth. Clin Sci (Lond) 2020; 133:2203-2215. [PMID: 31696215 DOI: 10.1042/cs20190924] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 10/18/2019] [Accepted: 10/21/2019] [Indexed: 01/30/2023]
Abstract
OBJECTIVE The role of chronic inflammation in abdominal aortic aneurysm (AAA) is controversial. CD11c+ antigen-presenting cells (APCs) (dendritic cells (DCs)) have been reported in human AAA samples but their role is unclear. The effect of conditional depletion of CD11c+ cells on experimental AAA was investigated in the angiotensin II (AngII)-infused apolipoprotein E-deficient (ApoE-/-) mouse model. APPROACH CD11c-diphtheria toxin (DT or D.tox) receptor (DTR), ovalbumin (OVA) fragment aa 140-386, and enhanced green fluorescent protein (eGFP)-ApoE-/- (CD11c.DOG.ApoE-/-) mice were generated and CD11c+ cell depletion achieved with D.tox injections (8 ng/g body weight, i.p., every-other-day). AAA formation and growth were assessed by measurement of supra-renal aortic (SRA) diameter in vivo by serial ultrasound and by morphometry assessment of harvested aortas at the end of the study. RESULTS Depletion of CD11c+ cells by administration of D.tox on alternative days was shown to reduce the maximum diameter of AAAs induced by 28 days AngII infusion compared with controls (D.tox, 1.58 ± 0.03 mm vs Vehicle control, 1.81 ± 0.06 mm, P<0.001). CD11c+ depletion commencing after AAA establishment by 14 days of AngII infusion, was also shown to lead to smaller AAAs than controls after a further 14 days (D.tox, 1.54 ± 0.04 mm vs Vehicle control, 1.80 ± 0.03 mm, P<0.001). Flow cytometry revealed significantly lower numbers of circulating CD44hi CD62Llo effector CD4 T cells, CD44hi CD62Llo effector CD8 T cells and B220+ B cells in CD11c+ cell-depleted mice versus controls. CD11c+ depletion attenuated SRA matrix degradation indicated by decreased neutrophil elastase activity (P=0.014), lower elastin degradation score (P=0.012) and higher collagen content (P=0.002). CONCLUSION CD11c+ cell-depletion inhibited experimental AAA development and growth associated with down-regulation of circulating effector T cells and attenuated matrix degradation. The findings suggest involvement of autoreactive immune cells in AAA pathogenesis.
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Haybar H, Maleki Behzad M, Shahrabi S, Ansari N, Saki N. Expression of Blood Cells Associated CD Markers and Cardiovascular Diseases: Clinical Applications in Prognosis. Lab Med 2020; 51:122-142. [PMID: 31340048 DOI: 10.1093/labmed/lmz049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Cardiovascular diseases (CVDs) are a major cause of mortality worldwide. The results of various studies have shown that abnormality in the frequency and function of blood cells can be involved in CVD complications. In this review, we have focused on abnormalities in the expression of the CD (cluster of differentiation) markers of blood cells to assess the association of these abnormalities with CVD prognosis. METHODS We identified the relevant literature through a PubMed search (1990-2018) of English-language articles using the terms "Cardiovascular diseases", "CD markers", "leukocytes", "platelets", and "endothelial cells". RESULTS There is a variety of mechanisms for the effect of CD-marker expressions on CVDs prognosis, ranging from proinflammatory processes to dysfunctional effects in blood cells. CONCLUSION Considering the possible effects of CD-marker expression on CVDs prognosis, particularly prognosis of acute myocardial infarction and atherosclerosis, long-term studies in large cohorts are required to identify the prognostic value of CD markers and to target them with appropriate therapeutic agents.
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Affiliation(s)
- Habib Haybar
- Atherosclerosis Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Masumeh Maleki Behzad
- Thalassemia and Hemoglobinopathy Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Saeid Shahrabi
- Department of Biochemistry and Hematology, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Narges Ansari
- Isfahan Bone Metabolic Disorders Research Center, Department of Internal Medicine, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Najmaldin Saki
- Thalassemia and Hemoglobinopathy Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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35
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Depletion of CD11c+ cell attenuates progression of abdominal aortic aneurysm. Clin Sci (Lond) 2020; 134:33-37. [PMID: 31898748 DOI: 10.1042/cs20191083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 12/19/2019] [Accepted: 12/20/2019] [Indexed: 11/17/2022]
Abstract
Chronic inflammation of the arterial wall has been implicated in the development of abdominal aortic aneurysm (AAA). However, the detailed molecular mechanism(s) by which inflammatory cells contributes to AAA pathogenesis remains largely unclear. In their article in Clinical Science, Krishna et al. have reported that depletion of CD11c+ dendritic cells inhibited experimental AAA formation in mice. The authors also demonstrated a decrease in CD4 and CD8 positive T cells in the circulation, lower plasma neutrophil elastase activity, and aortic matrix remodeling. These novel findings will help clarify the underlying mechanisms of AAA progression and may provide a new target for future therapeutic research in AAA formation.
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36
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Abstract
Aortic aneurysms are a common vascular disease in Western populations that can involve virtually any portion of the aorta. Abdominal aortic aneurysms are much more common than thoracic aortic aneurysms and combined they account for >25 000 deaths in the United States annually. Although thoracic and abdominal aortic aneurysms share some common characteristics, including the gross anatomic appearance, alterations in extracellular matrix, and loss of smooth muscle cells, they are distinct diseases. In recent years, advances in genetic analysis, robust molecular tools, and increased availability of animal models have greatly enhanced our knowledge of the pathophysiology of aortic aneurysms. This review examines the various proposed cellular mechanisms responsible for aortic aneurysm formation and identifies opportunities for future studies.
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Affiliation(s)
- Raymundo Alain Quintana
- From the Division of Cardiology, Department of Medicine (R.A.Q., W.R.T.), Emory University School of Medicine, Atlanta, GA
| | - W Robert Taylor
- From the Division of Cardiology, Department of Medicine (R.A.Q., W.R.T.), Emory University School of Medicine, Atlanta, GA.,Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology (W.R.T.), Emory University School of Medicine, Atlanta, GA.,Division of Cardiology, Atlanta VA Medical Center, Decatur, GA (W.R.T.)
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Nogi M, Satoh K, Sunamura S, Kikuchi N, Satoh T, Kurosawa R, Omura J, Elias-Al-Mamun M, Abdul Hai Siddique M, Numano K, Kudo S, Miyata S, Akiyama M, Kumagai K, Kawamoto S, Saiki Y, Shimokawa H. Small GTP-Binding Protein GDP Dissociation Stimulator Prevents Thoracic Aortic Aneurysm Formation and Rupture by Phenotypic Preservation of Aortic Smooth Muscle Cells. Circulation 2019; 138:2413-2433. [PMID: 29921611 DOI: 10.1161/circulationaha.118.035648] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Thoracic aortic aneurysm (TAA) and dissection are fatal diseases that cause aortic rupture and sudden death. The small GTP-binding protein GDP dissociation stimulator (SmgGDS) is a crucial mediator of the pleiotropic effects of statins. Previous studies revealed that reduced force generation in aortic smooth muscle cells (AoSMCs) causes TAA and thoracic aortic dissection. METHODS To examine the role of SmgGDS in TAA formation, we used an angiotensin II (1000 ng·min-1·kg-1, 4 weeks)-induced TAA model. RESULTS We found that 33% of Apoe-/- SmgGDS+/- mice died suddenly as a result of TAA rupture, whereas there was no TAA rupture in Apoe-/- control mice. In contrast, there was no significant difference in the ratio of abdominal aortic aneurysm rupture between the 2 genotypes. We performed ultrasound imaging every week to follow up the serial changes in aortic diameters. The diameter of the ascending aorta progressively increased in Apoe-/- SmgGDS+/- mice compared with Apoe-/- mice, whereas that of the abdominal aorta remained comparable between the 2 genotypes. Histological analysis of Apoe-/- SmgGDS+/- mice showed dissections of major thoracic aorta in the early phase of angiotensin II infusion (day 3 to 5) and more severe elastin degradation compared with Apoe-/- mice. Mechanistically, Apoe-/- SmgGDS+/- mice showed significantly higher levels of oxidative stress, matrix metalloproteinases, and inflammatory cell migration in the ascending aorta compared with Apoe-/- mice. For mechanistic analyses, we primary cultured AoSMCs from the 2 genotypes. After angiotensin II (100 nmol/L) treatment for 24 hours, Apoe-/- SmgGDS+/- AoSMCs showed significantly increased matrix metalloproteinase activity and oxidative stress levels compared with Apoe-/- AoSMCs. In addition, SmgGDS deficiency increased cytokines/chemokines and growth factors in AoSMCs. Moreover, expressions of fibrillin-1 ( FBN1), α-smooth muscle actin ( ACTA2), myosin-11 ( MYH11), MYLLK, and PRKG1, which are force generation genes, were significantly reduced in Apoe-/- SmgGDS+/- AoSMCs compared with Apoe-/- AoSMCs. A similar tendency was noted in AoSMCs from patients with TAA compared with those from control subjects. Finally, local delivery of the SmgGDS gene construct reversed the dilation of the ascending aorta in Apoe-/- SmgGDS+/- mice. CONCLUSIONS These results suggest that SmgGDS is a novel therapeutic target for the prevention and treatment of TAA.
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Affiliation(s)
- Masamichi Nogi
- Departments of Cardiovascular Medicine (M.N., K.S., S.S., N.K., T.S., R.K., J.O., M.E.-A.-M., M.A.H.S., K.N., S. Kudo, S.M., H.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kimio Satoh
- Departments of Cardiovascular Medicine (M.N., K.S., S.S., N.K., T.S., R.K., J.O., M.E.-A.-M., M.A.H.S., K.N., S. Kudo, S.M., H.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shinichiro Sunamura
- Departments of Cardiovascular Medicine (M.N., K.S., S.S., N.K., T.S., R.K., J.O., M.E.-A.-M., M.A.H.S., K.N., S. Kudo, S.M., H.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Nobuhiro Kikuchi
- Departments of Cardiovascular Medicine (M.N., K.S., S.S., N.K., T.S., R.K., J.O., M.E.-A.-M., M.A.H.S., K.N., S. Kudo, S.M., H.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Taijyu Satoh
- Departments of Cardiovascular Medicine (M.N., K.S., S.S., N.K., T.S., R.K., J.O., M.E.-A.-M., M.A.H.S., K.N., S. Kudo, S.M., H.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Ryo Kurosawa
- Departments of Cardiovascular Medicine (M.N., K.S., S.S., N.K., T.S., R.K., J.O., M.E.-A.-M., M.A.H.S., K.N., S. Kudo, S.M., H.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Junichi Omura
- Departments of Cardiovascular Medicine (M.N., K.S., S.S., N.K., T.S., R.K., J.O., M.E.-A.-M., M.A.H.S., K.N., S. Kudo, S.M., H.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Md Elias-Al-Mamun
- Departments of Cardiovascular Medicine (M.N., K.S., S.S., N.K., T.S., R.K., J.O., M.E.-A.-M., M.A.H.S., K.N., S. Kudo, S.M., H.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Mohammad Abdul Hai Siddique
- Departments of Cardiovascular Medicine (M.N., K.S., S.S., N.K., T.S., R.K., J.O., M.E.-A.-M., M.A.H.S., K.N., S. Kudo, S.M., H.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kazuhiko Numano
- Departments of Cardiovascular Medicine (M.N., K.S., S.S., N.K., T.S., R.K., J.O., M.E.-A.-M., M.A.H.S., K.N., S. Kudo, S.M., H.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shun Kudo
- Departments of Cardiovascular Medicine (M.N., K.S., S.S., N.K., T.S., R.K., J.O., M.E.-A.-M., M.A.H.S., K.N., S. Kudo, S.M., H.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Satoshi Miyata
- Departments of Cardiovascular Medicine (M.N., K.S., S.S., N.K., T.S., R.K., J.O., M.E.-A.-M., M.A.H.S., K.N., S. Kudo, S.M., H.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masatoshi Akiyama
- Cardiovascular Surgery (M.A., K.K., S. Kawamoto, Y.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kiichiro Kumagai
- Cardiovascular Surgery (M.A., K.K., S. Kawamoto, Y.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shunsuke Kawamoto
- Cardiovascular Surgery (M.A., K.K., S. Kawamoto, Y.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yoshikatsu Saiki
- Cardiovascular Surgery (M.A., K.K., S. Kawamoto, Y.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroaki Shimokawa
- Departments of Cardiovascular Medicine (M.N., K.S., S.S., N.K., T.S., R.K., J.O., M.E.-A.-M., M.A.H.S., K.N., S. Kudo, S.M., H.S.), Tohoku University Graduate School of Medicine, Sendai, Japan
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Porsch F, Binder CJ. Impact of B-Cell–Targeted Therapies on Cardiovascular Disease. Arterioscler Thromb Vasc Biol 2019; 39:1705-1714. [DOI: 10.1161/atvbaha.119.311996] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Atherosclerosis is a lipid-driven chronic inflammatory disease that is modulated by many immune cell subsets, including B cells. Therefore, targeting the inflammatory component of cardiovascular disease represents a promising therapeutic strategy. In the past years, immunotherapy has revolutionized the treatment of autoimmunity and cancer. Many of these clinically used strategies target B cells. Given the multifaceted role of B cells in atherogenesis, it is conceivable that B-cell–directed therapies can modulate disease development. Here, we review clinically available B-cell–targeted therapies and the possible benefits or detrimental effects on cardiovascular disease.
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Affiliation(s)
- Florentina Porsch
- From the Department for Laboratory Medicine, Medical University of Vienna, Austria (F.P., C.J.B.)
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria (F.P., C.J.B.)
| | - Christoph J. Binder
- From the Department for Laboratory Medicine, Medical University of Vienna, Austria (F.P., C.J.B.)
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria (F.P., C.J.B.)
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Laule CF, Odean EJ, Wing CR, Root KM, Towner KJ, Hamm CM, Gilbert JS, Fleming SD, Regal JF. Role of B1 and B2 lymphocytes in placental ischemia-induced hypertension. Am J Physiol Heart Circ Physiol 2019; 317:H732-H742. [PMID: 31397167 DOI: 10.1152/ajpheart.00132.2019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Preeclampsia is a prevalent pregnancy complication characterized by new-onset maternal hypertension and inflammation, with placental ischemia as the initiating event. Studies of others have provided evidence for the importance of lymphocytes in placental ischemia-induced hypertension; however, the contributions of B1 versus B2 lymphocytes are unknown. We hypothesized that peritoneal B1 lymphocytes are important for placental ischemia-induced hypertension. As an initial test of this hypothesis, the effect of anti-CD20 depletion on both B-cell populations was determined in a reduced utero-placental perfusion pressure (RUPP) model of preeclampsia. Anti-murine CD20 monoclonal antibody (5 mg/kg, Clone 5D2) or corresponding mu IgG2a isotype control was administered intraperitoneally to timed pregnant Sprague-Dawley rats on gestation day (GD)10 and 13. RUPP or sham control surgeries were performed on GD14, and mean arterial pressure (MAP) was measured on GD19 from a carotid catheter. As anticipated, RUPP surgery increased MAP and heart rate and decreased mean fetal and placental weight. However, anti-CD20 treatment did not affect these responses. On GD19, B-cell populations were enumerated in the blood, peritoneal cavity, spleen, and placenta with flow cytometry. B1 and B2 cells were not significantly increased following RUPP. Anti-CD20 depleted B1 and B2 cells in peritoneum and circulation but depleted only B2 lymphocytes in spleen and placenta, with no effect on circulating or peritoneal IgM. Overall, these data do not exclude a role for antibodies produced by B cells before depletion but indicate the presence of B lymphocytes in the last trimester of pregnancy is not critical for placental ischemia-induced hypertension.NEW & NOTEWORTHY The adaptive and innate immune systems are implicated in hypertension, including the pregnancy-specific hypertensive condition preeclampsia. However, the mechanism of immune system dysfunction leading to pregnancy-induced hypertension is unresolved. In contrast to previous reports, this study reveals that the presence of classic B2 lymphocytes and peritoneal and circulating B1 lymphocytes is not required for development of hypertension following third trimester placental ischemia in a rat model of pregnancy-induced hypertension.
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Affiliation(s)
- Connor F Laule
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth Campus, Duluth, Minnesota
| | - Evan J Odean
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth Campus, Duluth, Minnesota
| | - Cameron R Wing
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth Campus, Duluth, Minnesota
| | - Kate M Root
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth Campus, Duluth, Minnesota
| | - Kendra J Towner
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth Campus, Duluth, Minnesota
| | - Cassandra M Hamm
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth Campus, Duluth, Minnesota
| | - Jeffrey S Gilbert
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth Campus, Duluth, Minnesota
| | | | - Jean F Regal
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth Campus, Duluth, Minnesota
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Lu HS, Schmidt AM, Hegele RA, Mackman N, Rader DJ, Weber C, Daugherty A. Reporting Sex and Sex Differences in Preclinical Studies. Arterioscler Thromb Vasc Biol 2019; 38:e171-e184. [PMID: 30354222 DOI: 10.1161/atvbaha.118.311717] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Hong S Lu
- From the Department of Physiology, Saha Cardiovascular Research Center, University of Kentucky, Lexington (H.S.L., A.D.)
| | - Ann Marie Schmidt
- Diabetes Research Program, Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, New York University Langone Medical Center, New York, NY (A.M.S.)
| | - Robert A Hegele
- Department of Medicine and Robarts Research Institute, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada (R.A.H.)
| | - Nigel Mackman
- Department of Medicine, University of North Carolina at Chapel Hill (N.M.)
| | - Daniel J Rader
- Department of Medicine (D.J.R.), Perelman School of Medicine, University of Pennsylvania, Philadelphia.,Department of Genetics (D.J.R.), Perelman School of Medicine, University of Pennsylvania, Philadelphia
| | - Christian Weber
- Department of Medicine, Institute for Cardiovascular Prevention, Ludwig-Maximilians-Universität, Munich, Germany (C.W.).,German Centre for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany (C.W.)
| | - Alan Daugherty
- From the Department of Physiology, Saha Cardiovascular Research Center, University of Kentucky, Lexington (H.S.L., A.D.)
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Bagchi-Chakraborty J, Francis A, Bray T, Masters L, Tsiantoulas D, Nus M, Harrison J, Broekhuizen M, Leggat J, Clatworthy MR, Espéli M, Smith KG, Binder CJ, Mallat Z, Sage AP. B Cell Fcγ Receptor IIb Modulates Atherosclerosis in Male and Female Mice by Controlling Adaptive Germinal Center and Innate B-1-Cell Responses. Arterioscler Thromb Vasc Biol 2019; 39:1379-1389. [PMID: 31092015 PMCID: PMC6636804 DOI: 10.1161/atvbaha.118.312272] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 04/22/2019] [Indexed: 02/02/2023]
Abstract
Objective- Investigate the impact of modulating B cell FcγRIIb (Fcγ receptor IIb) expression on atherosclerosis. Approach and Results- Western diet-induced atherosclerosis was assessed in Ldlr-/- or Apoe-/- mice with B cell-specific overexpression of FcγRIIb or with an FcγRIIb promoter mutation that alters FcγRIIb expression in germinal center (GC) B cells. In males, overexpression of FcγRIIb on B cells severely reduced activated, class switched B cell responses, as indicated by reductions in GC B cells, plasma cells, and serum IgG but not IgM antibodies. Male mice overexpressing FcγRIIb developed less atherosclerosis, suggesting a pathogenic role for GC B cell IgG responses. In support of this hypothesis, male mice with a promoter polymorphism-driven reduction in FcγRIIb on GC B cells but not plasma cells have a converse phenotype of enhanced GC responses and IgG2c antibodies and enhanced atherosclerosis. IgG2c significantly enhanced TNF (tumor necrosis factor) secretion by CD11b+ CD11c+ cells expressing the high-affinity receptor FcγRIV. In females, overexpression of FcγRIIb on B cells not only reduced GC B cell responses but also substantially reduced B-1 cells and IgM antibodies, which translated into acceleration of atherosclerosis. Promoter-driven reduction in FcγRIIb did not alter GC B cell responses in females and, therefore, had no impact on atherosclerosis. Conclusions- B cell FcγRIIb differentially alters proatherogenic adaptive GC B cell and atheroprotective innate B-1 responses in male and female mice fed a western diet. Our results highlight the importance of a better understanding and ability to selectively target B cell responses in future immunotherapeutic approaches against human cardiovascular disease. Visual Overview- An online visual overview is available for this article.
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Affiliation(s)
- Jayashree Bagchi-Chakraborty
- From the Division of Cardiovascular Medicine (J.B.-C., A.F., T.B., L.M., D.T., M.N., J.H., M.B., J.L., Z.M., A.P.S.), Department of Medicine, University of Cambridge, United Kingdom
| | - Anna Francis
- From the Division of Cardiovascular Medicine (J.B.-C., A.F., T.B., L.M., D.T., M.N., J.H., M.B., J.L., Z.M., A.P.S.), Department of Medicine, University of Cambridge, United Kingdom
| | - Toni Bray
- From the Division of Cardiovascular Medicine (J.B.-C., A.F., T.B., L.M., D.T., M.N., J.H., M.B., J.L., Z.M., A.P.S.), Department of Medicine, University of Cambridge, United Kingdom
| | - Leanne Masters
- From the Division of Cardiovascular Medicine (J.B.-C., A.F., T.B., L.M., D.T., M.N., J.H., M.B., J.L., Z.M., A.P.S.), Department of Medicine, University of Cambridge, United Kingdom
| | - Dimitrios Tsiantoulas
- From the Division of Cardiovascular Medicine (J.B.-C., A.F., T.B., L.M., D.T., M.N., J.H., M.B., J.L., Z.M., A.P.S.), Department of Medicine, University of Cambridge, United Kingdom
| | - Meritxell Nus
- From the Division of Cardiovascular Medicine (J.B.-C., A.F., T.B., L.M., D.T., M.N., J.H., M.B., J.L., Z.M., A.P.S.), Department of Medicine, University of Cambridge, United Kingdom
| | - James Harrison
- From the Division of Cardiovascular Medicine (J.B.-C., A.F., T.B., L.M., D.T., M.N., J.H., M.B., J.L., Z.M., A.P.S.), Department of Medicine, University of Cambridge, United Kingdom
| | - Michelle Broekhuizen
- From the Division of Cardiovascular Medicine (J.B.-C., A.F., T.B., L.M., D.T., M.N., J.H., M.B., J.L., Z.M., A.P.S.), Department of Medicine, University of Cambridge, United Kingdom
| | - Jennifer Leggat
- From the Division of Cardiovascular Medicine (J.B.-C., A.F., T.B., L.M., D.T., M.N., J.H., M.B., J.L., Z.M., A.P.S.), Department of Medicine, University of Cambridge, United Kingdom
| | - Menna R. Clatworthy
- Division of Immunology (M.R.C., K.G.C.S., Z.M.), Department of Medicine, University of Cambridge, United Kingdom
| | - Marion Espéli
- INSERM U1160, Institut de Recherche Saint-Louis, Saint Louis Hospital, Paris, France (M.E.)
| | - Kenneth G.C. Smith
- Division of Immunology (M.R.C., K.G.C.S., Z.M.), Department of Medicine, University of Cambridge, United Kingdom
| | - Christoph J. Binder
- Department of Laboratory Medicine, Medical University of Vienna, Austria (C.J.B.)
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna (C.J.B.)
| | - Ziad Mallat
- From the Division of Cardiovascular Medicine (J.B.-C., A.F., T.B., L.M., D.T., M.N., J.H., M.B., J.L., Z.M., A.P.S.), Department of Medicine, University of Cambridge, United Kingdom
- Division of Immunology (M.R.C., K.G.C.S., Z.M.), Department of Medicine, University of Cambridge, United Kingdom
- Institut National de la Santé et de la Recherche Médicale, Universite Paris-Descartes, Paris Cardiovascular Research Center, and Université Paris-Descartes, France (Z.M.)
| | - Andrew P. Sage
- From the Division of Cardiovascular Medicine (J.B.-C., A.F., T.B., L.M., D.T., M.N., J.H., M.B., J.L., Z.M., A.P.S.), Department of Medicine, University of Cambridge, United Kingdom
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Gao Y, Wang Z, Zhao J, Sun W, Guo J, Yang Z, Tu Y, Yu C, Pan L, Zheng J. Involvement of B cells in the pathophysiology of β-aminopropionitrile-induced thoracic aortic dissection in mice. Exp Anim 2019; 68:331-339. [PMID: 30930402 PMCID: PMC6699969 DOI: 10.1538/expanim.18-0170] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Thoracic aortic dissection (TAD) is a life-threatening disease that is characterized by
an inflammatory response. Innate and cellular immunity has long been known to be involved
in TAD, but the role of humoral immunity in the pathophysiology of TAD remains unknown. We
administered the lysyl oxidase inhibitor β-aminopropionitrile (BAPN; 1 g/kg/day) in
3-week-old male C57BL/6J mice for 4 weeks to establish an animal model of TAD. Animals
that died were immediately dissected. Animals that survived were sacrificed on days 7, 14,
and 28 after BAPN challenge. The incidence and rupture rates of BAPN-induced TAD were 90%
(9/10) and 70% (7/10), respectively, at 28 days. Victoria blue-nuclear fast red staining
of aortic tissue revealed elastic lamellae destruction and the formation of a false lumen
in the BAPN group. Hematoxylin-eosin staining revealed the infiltration of both
plasmacytoid mononuclear cells and polymorphonuclear inflammatory cells in TAD tissues.
Enzyme-linked immunosorbent assay and immunohistochemistry indicated that plasma
immunoglobin M (IgM) and IgG were elevated at 7, 14, and 28 days, and CD19-positive B
cells infiltrated into the adventitia of aortic tissue in BAPN-treated mice. The
transcriptional analysis showed an increase in the expression of B cell receptor
signaling-associated genes. These results indicate that B cells and immunoglobulins might
participate in the pathogenesis of TAD, suggesting that humoral immunity may be a possible
therapeutic target for TAD.
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Affiliation(s)
- Yanxiang Gao
- Department of Cardiology, China-Japan Friendship Hospital, 2 Yinghua Dongjie, Chaoyang District, Beijing 100029, China
| | - Zhizhi Wang
- Department of Cardiology, China-Japan Friendship School of Clinical Medicine, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100029, China
| | - Jianqiao Zhao
- Department of Cardiology, Peking University China-Japan Friendship School of Clinical Medicine, Beijing, 100029, China
| | - Weiliang Sun
- Biomedical Experimental Research, Institute of Clinical Medicine, China-Japan Friendship Hospital, 2 Yinghua Dongjie, Chaoyang District, Beijing 100029, China
| | - Jing Guo
- Biomedical Experimental Research, Institute of Clinical Medicine, China-Japan Friendship Hospital, 2 Yinghua Dongjie, Chaoyang District, Beijing 100029, China
| | - Zufang Yang
- Department of Cardiology, Peking University China-Japan Friendship School of Clinical Medicine, Beijing, 100029, China
| | - Yimin Tu
- Department of Cardiology, China-Japan Friendship School of Clinical Medicine, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100029, China
| | - Changan Yu
- Central Laboratory of Cardiovascular Disease, China-Japan Friendship Hospital, 2 Yinghua Dongjie, Chaoyang District, Beijing 100029, China
| | - Lin Pan
- Biomedical Experimental Research, Institute of Clinical Medicine, China-Japan Friendship Hospital, 2 Yinghua Dongjie, Chaoyang District, Beijing 100029, China
| | - Jingang Zheng
- Department of Cardiology, China-Japan Friendship Hospital, 2 Yinghua Dongjie, Chaoyang District, Beijing 100029, China.,Department of Cardiology, China-Japan Friendship School of Clinical Medicine, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100029, China.,Department of Cardiology, Peking University China-Japan Friendship School of Clinical Medicine, Beijing, 100029, China
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Abstract
Current management of aortic aneurysms relies exclusively on prophylactic operative repair of larger aneurysms. Great potential exists for successful medical therapy that halts or reduces aneurysm progression and hence alleviates or postpones the need for surgical repair. Preclinical studies in the context of abdominal aortic aneurysm identified hundreds of candidate strategies for stabilization, and data from preoperative clinical intervention studies show that interventions in the pathways of the activated inflammatory and proteolytic cascades in enlarging abdominal aortic aneurysm are feasible. Similarly, the concept of pharmaceutical aorta stabilization in Marfan syndrome is supported by a wealth of promising studies in the murine models of Marfan syndrome-related aortapathy. Although some clinical studies report successful medical stabilization of growing aortic aneurysms and aortic root stabilization in Marfan syndrome, these claims are not consistently confirmed in larger and controlled studies. Consequently, no medical therapy can be recommended for the stabilization of aortic aneurysms. The discrepancy between preclinical successes and clinical trial failures implies shortcomings in the available models of aneurysm disease and perhaps incomplete understanding of the pathological processes involved in later stages of aortic aneurysm progression. Preclinical models more reflective of human pathophysiology, identification of biomarkers to predict severity of disease progression, and improved design of clinical trials may more rapidly advance the opportunities in this important field.
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Affiliation(s)
- Jan H. Lindeman
- Dept. Vascular Surgery, Leiden University Medical Center, The Netherlands
| | - Jon S. Matsumura
- Division of Vascular Surgery, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin
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Affiliation(s)
- Jacqueline S Dron
- From the Department of Biochemistry (J.S.D., J.L., R.A.H.), Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
- Robarts Research Institute (J.S.D., J.L., R.A.H.), Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
| | - Julieta Lazarte
- From the Department of Biochemistry (J.S.D., J.L., R.A.H.), Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
- Robarts Research Institute (J.S.D., J.L., R.A.H.), Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
- Department of Medicine (J.L., R.A.H.), Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
| | - Robert A Hegele
- From the Department of Biochemistry (J.S.D., J.L., R.A.H.), Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
- Robarts Research Institute (J.S.D., J.L., R.A.H.), Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
- Department of Medicine (J.L., R.A.H.), Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
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Wu CH, Mohammadmoradi S, Chen JZ, Sawada H, Daugherty A, Lu HS. Renin-Angiotensin System and Cardiovascular Functions. Arterioscler Thromb Vasc Biol 2018; 38:e108-e116. [PMID: 29950386 PMCID: PMC6039412 DOI: 10.1161/atvbaha.118.311282] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Chia-Hua Wu
- From the Saha Cardiovascular Research Center (C.-H.W., S.M., J.Z.C., H.S., A.D., H.S.L.)
- Department of Pharmacology and Nutritional Sciences (C.-H.W., S.M., A.D., H.S.L.)
| | - Shayan Mohammadmoradi
- From the Saha Cardiovascular Research Center (C.-H.W., S.M., J.Z.C., H.S., A.D., H.S.L.)
- Department of Pharmacology and Nutritional Sciences (C.-H.W., S.M., A.D., H.S.L.)
| | - Jeff Z Chen
- From the Saha Cardiovascular Research Center (C.-H.W., S.M., J.Z.C., H.S., A.D., H.S.L.)
- Department of Physiology (J.Z.C., A.D., H.S.L.), University of Kentucky, Lexington
| | - Hisashi Sawada
- From the Saha Cardiovascular Research Center (C.-H.W., S.M., J.Z.C., H.S., A.D., H.S.L.)
| | - Alan Daugherty
- From the Saha Cardiovascular Research Center (C.-H.W., S.M., J.Z.C., H.S., A.D., H.S.L.)
- Department of Pharmacology and Nutritional Sciences (C.-H.W., S.M., A.D., H.S.L.)
- Department of Physiology (J.Z.C., A.D., H.S.L.), University of Kentucky, Lexington
| | - Hong S Lu
- From the Saha Cardiovascular Research Center (C.-H.W., S.M., J.Z.C., H.S., A.D., H.S.L.)
- Department of Pharmacology and Nutritional Sciences (C.-H.W., S.M., A.D., H.S.L.)
- Department of Physiology (J.Z.C., A.D., H.S.L.), University of Kentucky, Lexington
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Modulation of Immune-Inflammatory Responses in Abdominal Aortic Aneurysm: Emerging Molecular Targets. J Immunol Res 2018; 2018:7213760. [PMID: 29967801 PMCID: PMC6008668 DOI: 10.1155/2018/7213760] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 03/18/2018] [Accepted: 03/31/2018] [Indexed: 12/24/2022] Open
Abstract
Abdominal aortic aneurysm (AAA), a deadly vascular disease in human, is a chronic degenerative process of the abdominal aorta. In this process, inflammatory responses and immune system work efficiently by inflammatory cell attraction, proinflammatory factor secretion and subsequently MMP upregulation. Previous studies have demonstrated various inflammatory cell types in AAA of human and animals. The majority of cells, such as macrophages, CD4+ T cells, and B cells, play an important role in the diseased aortic wall through phenotypic modulation. Furthermore, immunoglobulins also greatly affect the functions and differentiation of immune cells in AAA. Recent evidence suggests that innate immune system, especially Toll-like receptors, chemokine receptors, and complements are involved in the progression of AAAs. We discussed the innate immune system, inflammatory cells, immunoglobulins, immune-mediated mechanisms, and key cytokines in the pathogenesis of AAA and particularly emphasis on a further trend and application of these interventions. This current understanding may offer new insights into the role of inflammation and immune response in AAA.
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Meher AK, Spinosa M, Davis JP, Pope N, Laubach VE, Su G, Serbulea V, Leitinger N, Ailawadi G, Upchurch GR. Novel Role of IL (Interleukin)-1β in Neutrophil Extracellular Trap Formation and Abdominal Aortic Aneurysms. Arterioscler Thromb Vasc Biol 2018; 38:843-853. [PMID: 29472233 PMCID: PMC5864548 DOI: 10.1161/atvbaha.117.309897] [Citation(s) in RCA: 140] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 02/12/2018] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Neutrophils promote experimental abdominal aortic aneurysm (AAA) formation via a mechanism that is independent from MMPs (matrix metalloproteinases). Recently, we reported a dominant role of IL (interleukin)-1β in the formation of murine experimental AAAs. Here, the hypothesis that IL-1β-induced neutrophil extracellular trap formation (NETosis) promotes AAA was tested. APPROACH AND RESULTS NETs were identified through colocalized staining of neutrophil, Cit-H3 (citrullinated histone H3), and DNA, using immunohistochemistry. NETs were detected in human AAAs and were colocalized with IL-1β. In vitro, IL-1RA attenuated IL-1β-induced NETosis in human neutrophils. Mechanistically, IL-1β treatment of isolated neutrophils induced nuclear localization of ceramide synthase 6 and synthesis of C16-ceramide, which was inhibited by IL-1RA or fumonisin B1, an inhibitor of ceramide synthesis. Furthermore, IL-1RA or fumonisin B1 attenuated IL1-β-induced NETosis. In an experimental model of murine AAA, NETs were detected at a very early stage-day 3 of aneurysm induction. IL-1β-knockout mice demonstrated significantly lower infiltration of neutrophils to aorta and were protected from AAA. Adoptive transfer of wild-type neutrophils promoted AAA formation in IL-1β-knockout mice. Moreover, treatment of wild-type mice with Cl-amidine, an inhibitor NETosis, significantly attenuated AAA formation, whereas, treatment with deoxyribonuclease, a DNA digesting enzyme, had no effect on AAA formation. CONCLUSIONS Altogether, the results suggest a dominant role of IL-1β-induced NETosis in AAA formation.
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MESH Headings
- Animals
- Aorta, Abdominal/drug effects
- Aorta, Abdominal/metabolism
- Aorta, Abdominal/pathology
- Aortic Aneurysm, Abdominal/genetics
- Aortic Aneurysm, Abdominal/metabolism
- Aortic Aneurysm, Abdominal/pathology
- Aortic Aneurysm, Abdominal/prevention & control
- Ceramides/metabolism
- Disease Models, Animal
- Extracellular Traps/drug effects
- Extracellular Traps/metabolism
- Humans
- Image Processing, Computer-Assisted/methods
- Interleukin-1beta/deficiency
- Interleukin-1beta/genetics
- Interleukin-1beta/metabolism
- Membrane Proteins/metabolism
- Mice
- Mice, Knockout
- Microscopy, Fluorescence/methods
- Neutrophils/drug effects
- Neutrophils/metabolism
- Neutrophils/pathology
- Neutrophils/transplantation
- Ornithine/analogs & derivatives
- Ornithine/pharmacology
- Receptors, Interleukin-1/metabolism
- Signal Transduction
- Sphingosine N-Acyltransferase/metabolism
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Affiliation(s)
- Akshaya K Meher
- From the Department of Surgery (A.K.M., M.S., J.P.D., N.P., V.E.L., G.S., G.A., G.R.U.), Department of Pharmacology (A.K.M., V.S., N.L.), Robert M. Berne Cardiovascular Research Center (A.K.M., N.L., G.A., G.R.U.), Department of Molecular Physiology and Biological Physics (G.R.U.), and Department of Biomedical Engineering (G.A.), University of Virginia, Charlottesville.
| | - Michael Spinosa
- From the Department of Surgery (A.K.M., M.S., J.P.D., N.P., V.E.L., G.S., G.A., G.R.U.), Department of Pharmacology (A.K.M., V.S., N.L.), Robert M. Berne Cardiovascular Research Center (A.K.M., N.L., G.A., G.R.U.), Department of Molecular Physiology and Biological Physics (G.R.U.), and Department of Biomedical Engineering (G.A.), University of Virginia, Charlottesville
| | - John P Davis
- From the Department of Surgery (A.K.M., M.S., J.P.D., N.P., V.E.L., G.S., G.A., G.R.U.), Department of Pharmacology (A.K.M., V.S., N.L.), Robert M. Berne Cardiovascular Research Center (A.K.M., N.L., G.A., G.R.U.), Department of Molecular Physiology and Biological Physics (G.R.U.), and Department of Biomedical Engineering (G.A.), University of Virginia, Charlottesville
| | - Nicolas Pope
- From the Department of Surgery (A.K.M., M.S., J.P.D., N.P., V.E.L., G.S., G.A., G.R.U.), Department of Pharmacology (A.K.M., V.S., N.L.), Robert M. Berne Cardiovascular Research Center (A.K.M., N.L., G.A., G.R.U.), Department of Molecular Physiology and Biological Physics (G.R.U.), and Department of Biomedical Engineering (G.A.), University of Virginia, Charlottesville
| | - Victor E Laubach
- From the Department of Surgery (A.K.M., M.S., J.P.D., N.P., V.E.L., G.S., G.A., G.R.U.), Department of Pharmacology (A.K.M., V.S., N.L.), Robert M. Berne Cardiovascular Research Center (A.K.M., N.L., G.A., G.R.U.), Department of Molecular Physiology and Biological Physics (G.R.U.), and Department of Biomedical Engineering (G.A.), University of Virginia, Charlottesville
| | - Gang Su
- From the Department of Surgery (A.K.M., M.S., J.P.D., N.P., V.E.L., G.S., G.A., G.R.U.), Department of Pharmacology (A.K.M., V.S., N.L.), Robert M. Berne Cardiovascular Research Center (A.K.M., N.L., G.A., G.R.U.), Department of Molecular Physiology and Biological Physics (G.R.U.), and Department of Biomedical Engineering (G.A.), University of Virginia, Charlottesville
| | - Vlad Serbulea
- From the Department of Surgery (A.K.M., M.S., J.P.D., N.P., V.E.L., G.S., G.A., G.R.U.), Department of Pharmacology (A.K.M., V.S., N.L.), Robert M. Berne Cardiovascular Research Center (A.K.M., N.L., G.A., G.R.U.), Department of Molecular Physiology and Biological Physics (G.R.U.), and Department of Biomedical Engineering (G.A.), University of Virginia, Charlottesville
| | - Norbert Leitinger
- From the Department of Surgery (A.K.M., M.S., J.P.D., N.P., V.E.L., G.S., G.A., G.R.U.), Department of Pharmacology (A.K.M., V.S., N.L.), Robert M. Berne Cardiovascular Research Center (A.K.M., N.L., G.A., G.R.U.), Department of Molecular Physiology and Biological Physics (G.R.U.), and Department of Biomedical Engineering (G.A.), University of Virginia, Charlottesville
| | - Gorav Ailawadi
- From the Department of Surgery (A.K.M., M.S., J.P.D., N.P., V.E.L., G.S., G.A., G.R.U.), Department of Pharmacology (A.K.M., V.S., N.L.), Robert M. Berne Cardiovascular Research Center (A.K.M., N.L., G.A., G.R.U.), Department of Molecular Physiology and Biological Physics (G.R.U.), and Department of Biomedical Engineering (G.A.), University of Virginia, Charlottesville
| | - Gilbert R Upchurch
- From the Department of Surgery (A.K.M., M.S., J.P.D., N.P., V.E.L., G.S., G.A., G.R.U.), Department of Pharmacology (A.K.M., V.S., N.L.), Robert M. Berne Cardiovascular Research Center (A.K.M., N.L., G.A., G.R.U.), Department of Molecular Physiology and Biological Physics (G.R.U.), and Department of Biomedical Engineering (G.A.), University of Virginia, Charlottesville
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Furusho A, Aoki H, Ohno-Urabe S, Nishihara M, Hirakata S, Nishida N, Ito S, Hayashi M, Imaizumi T, Hiromatsu S, Akashi H, Tanaka H, Fukumoto Y. Involvement of B Cells, Immunoglobulins, and Syk in the Pathogenesis of Abdominal Aortic Aneurysm. J Am Heart Assoc 2018; 7:JAHA.117.007750. [PMID: 29545260 PMCID: PMC5907549 DOI: 10.1161/jaha.117.007750] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background Abdominal aortic aneurysm (AAA) is a potentially life‐threatening disease that is common in older individuals. Currently, therapeutic options are limited to surgical interventions. Although it has long been known that AAA tissue is enriched in B cells and immunoglobulins, their involvement in AAA pathogenesis remains controversial. Methods and Results We investigated the role of B cells and immunoglobulins in a murine model of AAA, induced with a periaortic application of CaCl2, and in human AAA. Both human and mouse AAA tissue showed B‐cell infiltration. Mouse AAA tissue showed deposition of IgG and activation of Syk, a key molecule in B‐cell activation and immunoglobulin function, which were localized to infiltrating cells including B cells and macrophages. B‐cell–deficient muMT mice showed suppression of AAA development that was associated with reduced activation of Syk and less expression of matrix metalloproteinase‐9. Administration of exogenous immunoglobulins restored the blunted Syk activation and AAA development in muMT mice. Additionally, exogenous immunoglobulins induced interleukin‐6 and metalloproteinase‐9 secretions in human AAA tissue cultures. Furthermore, administration of R788, a specific Syk inhibitor, suppressed AAA expansion, reduced inflammatory response, and reduced immunoglobulin deposition in AAA tissue. Conclusions From these results, we concluded that B cells and immunoglobulins participated in AAA pathogenesis by promoting inflammatory and tissue‐destructive activities. Finally, we identified Syk as a potential therapeutic target.
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Affiliation(s)
- Aya Furusho
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Hiroki Aoki
- Cardiovascular Research Institute, Kurume University, Kurume, Japan
| | - Satoko Ohno-Urabe
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Michihide Nishihara
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Saki Hirakata
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Norifumi Nishida
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Sohei Ito
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Makiko Hayashi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Kurume, Japan
| | | | - Shinichi Hiromatsu
- Division of Cardiovascular Surgery, Department of Surgery, Kurume University School of Medicine, Kurume, Japan
| | - Hidetoshi Akashi
- Division of Cardiovascular Surgery, Department of Surgery, Kurume University School of Medicine, Kurume, Japan
| | - Hiroyuki Tanaka
- Division of Cardiovascular Surgery, Department of Surgery, Kurume University School of Medicine, Kurume, Japan
| | - Yoshihiro Fukumoto
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kurume University School of Medicine, Kurume, Japan
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50
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MESH Headings
- Animals
- Aorta, Abdominal/metabolism
- Aorta, Abdominal/pathology
- Aorta, Abdominal/physiopathology
- Aorta, Thoracic/metabolism
- Aorta, Thoracic/pathology
- Aorta, Thoracic/physiopathology
- Aortic Aneurysm, Abdominal/epidemiology
- Aortic Aneurysm, Abdominal/metabolism
- Aortic Aneurysm, Abdominal/pathology
- Aortic Aneurysm, Abdominal/physiopathology
- Aortic Aneurysm, Thoracic/epidemiology
- Aortic Aneurysm, Thoracic/metabolism
- Aortic Aneurysm, Thoracic/pathology
- Aortic Aneurysm, Thoracic/physiopathology
- Disease Models, Animal
- Humans
- Risk Factors
- Signal Transduction
- Vascular Remodeling
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Affiliation(s)
- Hong Lu
- From the Department of Physiology, Saha Cardiovascular Research Center, University of Kentucky, Lexington.
| | - Alan Daugherty
- From the Department of Physiology, Saha Cardiovascular Research Center, University of Kentucky, Lexington
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