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Baker CJ, Min D, Marsh-Wakefield F, Siwan E, Gerofi J, Wang X, Hocking SL, Colagiuri S, Johnson NA, Twigg SM. Circulating CD31 + Angiogenic T cells are reduced in prediabetes and increase with exercise training. J Diabetes Complications 2024; 38:108868. [PMID: 39299028 DOI: 10.1016/j.jdiacomp.2024.108868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 09/02/2024] [Accepted: 09/14/2024] [Indexed: 09/22/2024]
Abstract
AIMS To investigate circulating angiogenic cells in adults with prediabetes and the effect of a structured exercise program. METHODS A cohort of adults with overweight/obesity and either normal glucose (NG) or prediabetes were randomised to receive exercise (Exercise) (as twice weekly supervised combined high intensity aerobic exercise and progressive resistance training, and once weekly home-based aerobic exercise) or an unsupervised stretching intervention (Control) for 12 weeks. Circulating angiogenic T cells, muscle strength, and cardiovascular disease risk factors, including blood lipids, arterial stiffness, central haemodynamic responses, and cardiorespiratory fitness (VO2peak) in those with prediabetes (n = 35, 16 Control, 19 Exercise) and NG (n = 37, 17 Control, 20 Exercise) were analysed at baseline and after the 12-week intervention. RESULTS At baseline, compared with NG those with prediabetes demonstrated reduced VO2peak, angiogenic CD31+CD8+ T cells and VEGFR2+CD4+ T cells, and increased systolic blood pressure. CD31+ T cells were negatively correlated with cardiovascular disease (CVD) risk. Compared with Control, exercise training increased muscle strength, VO2peak, and CD31+CD4+ and CD31+CD8+ T cells in NG and prediabetes. CONCLUSIONS Circulating angiogenic CD31+ T cells are decreased in people with prediabetes and are enhanced with exercise training. Exercise increases CD31+ T cells, and through this mechanism it is proposed that it may reduce CVD risk. TRIAL REGISTRATION Australian New Zealand Clinical Trials Registry number: ACTRN12617000552381.
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Affiliation(s)
- Callum J Baker
- Greg Brown Diabetes & Endocrinology Research Laboratory, Charles Perkins Centre, University of Sydney, Sydney, Australia; Central Clinical School, Faculty of Medicine and Health, University of Sydney, Australia
| | - Danqing Min
- Greg Brown Diabetes & Endocrinology Research Laboratory, Charles Perkins Centre, University of Sydney, Sydney, Australia; Central Clinical School, Faculty of Medicine and Health, University of Sydney, Australia; Department of Endocrinology, Royal Prince Alfred Hospital, Sydney, Australia
| | - Felix Marsh-Wakefield
- Liver Injury and Cancer Program, Centenary Institute, Sydney, NSW, Australia; Human Cancer and Viral Immunology Laboratory, The University of Sydney, Sydney, NSW, Australia
| | - Elisha Siwan
- Greg Brown Diabetes & Endocrinology Research Laboratory, Charles Perkins Centre, University of Sydney, Sydney, Australia; Central Clinical School, Faculty of Medicine and Health, University of Sydney, Australia
| | - James Gerofi
- Greg Brown Diabetes & Endocrinology Research Laboratory, Charles Perkins Centre, University of Sydney, Sydney, Australia; Central Clinical School, Faculty of Medicine and Health, University of Sydney, Australia
| | - Xiaoyu Wang
- Greg Brown Diabetes & Endocrinology Research Laboratory, Charles Perkins Centre, University of Sydney, Sydney, Australia; Central Clinical School, Faculty of Medicine and Health, University of Sydney, Australia
| | - Samantha L Hocking
- Central Clinical School, Faculty of Medicine and Health, University of Sydney, Australia; Department of Endocrinology, Royal Prince Alfred Hospital, Sydney, Australia; Boden Initiative, Charles Perkins Centre, University of Sydney, NSW, Australia
| | - Stephen Colagiuri
- Central Clinical School, Faculty of Medicine and Health, University of Sydney, Australia; Boden Initiative, Charles Perkins Centre, University of Sydney, NSW, Australia
| | - Nathan A Johnson
- Boden Initiative, Charles Perkins Centre, University of Sydney, NSW, Australia; Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006, Australia
| | - Stephen M Twigg
- Greg Brown Diabetes & Endocrinology Research Laboratory, Charles Perkins Centre, University of Sydney, Sydney, Australia; Central Clinical School, Faculty of Medicine and Health, University of Sydney, Australia; Department of Endocrinology, Royal Prince Alfred Hospital, Sydney, Australia.
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2
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Loste A, Clément M, Delbosc S, Guedj K, Sénémaud J, Gaston AT, Morvan M, Even G, Gautier G, Eggel A, Arock M, Procopio E, Deschildre C, Louedec L, Michel JB, Deschamps L, Castier Y, Coscas R, Alsac JM, Launay P, Caligiuri G, Nicoletti A, Le Borgne M. Involvement of an IgE/Mast cell/B cell amplification loop in abdominal aortic aneurysm progression. PLoS One 2023; 18:e0295408. [PMID: 38055674 DOI: 10.1371/journal.pone.0295408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 11/21/2023] [Indexed: 12/08/2023] Open
Abstract
AIMS IgE type immunoglobulins and their specific effector cells, mast cells (MCs), are associated with abdominal aortic aneurysm (AAA) progression. In parallel, immunoglobulin-producing B cells, organised in tertiary lymphoid organs (TLOs) within the aortic wall, have also been linked to aneurysmal progression. We aimed at investigating the potential role and mechanism linking local MCs, TLO B cells, and IgE production in aneurysmal progression. METHODS AND RESULTS Through histological assays conducted on human surgical samples from AAA patients, we uncovered that activated MCs were enriched at sites of unhealed haematomas, due to subclinical aortic wall fissuring, in close proximity to adventitial IgE+ TLO B cells. Remarkably, in vitro the IgEs deriving from these samples enhanced MC production of IL-4, a cytokine which favors IgE class-switching and production by B cells. Finally, the role of MCs in aneurysmal progression was further analysed in vivo in ApoE-/- mice subjected to angiotensin II infusion aneurysm model, through MC-specific depletion after the establishment of dissecting aneurysms. MC-specific depletion improved intramural haematoma healing and reduced aneurysmal progression. CONCLUSIONS Our data suggest that MC located close to aortic wall fissures are activated by adventitial TLO B cell-produced IgEs and participate to their own activation by providing support for further IgE synthesis through IL-4 production. By preventing prompt repair of aortic subclinical fissures, such a runaway MC activation loop could precipitate aneurysmal progression, suggesting that MC-targeting treatments may represent an interesting adjunctive therapy for reducing AAA progression.
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Affiliation(s)
- Alexia Loste
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- DHU FIRE, Paris, France
| | - Marc Clément
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- DHU FIRE, Paris, France
| | - Sandrine Delbosc
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- DHU FIRE, Paris, France
| | - Kevin Guedj
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- DHU FIRE, Paris, France
| | - Jean Sénémaud
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- DHU FIRE, Paris, France
- Department of Vascular and Thoracic Surgery, AP-HP, Bichat Hospital, Université Paris Cité, Paris, France
| | - Anh-Thu Gaston
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- DHU FIRE, Paris, France
| | - Marion Morvan
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- DHU FIRE, Paris, France
| | - Guillaume Even
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- DHU FIRE, Paris, France
| | - Grégory Gautier
- DHU FIRE, Paris, France
- INSERM UMRS 1149, Centre de Recherche sur l'Inflammation (CRI), Université Paris Cité, Paris, France
| | - Alexander Eggel
- Department for BioMedical Research, University of Bern, Bern, Switzerland
| | - Michel Arock
- Department of Biology and CNRS UMR8113, Ecole Normale Supérieure de Paris-Saclay, Saclay, France
| | - Emanuele Procopio
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- DHU FIRE, Paris, France
| | - Catherine Deschildre
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- DHU FIRE, Paris, France
| | - Liliane Louedec
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- DHU FIRE, Paris, France
| | - Jean-Baptiste Michel
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- DHU FIRE, Paris, France
| | - Lydia Deschamps
- Department of Pathology, AP-HP, Bichat Hospital, Université Paris Cité, Paris, France
| | - Yves Castier
- INSERM UMRS 1149, Centre de Recherche sur l'Inflammation (CRI), Université Paris Cité, Paris, France
| | - Raphaël Coscas
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- Department of Vascular Surgery, AP-HP, Ambroise Paré University Hospital, Université Paris Cité, Boulogne-Billancourt, France
| | - Jean-Marc Alsac
- Department of Vascular Surgery, AP-HP, Hôpital Européen Georges Pompidou, Université Paris Cité, Paris, France
| | - Pierre Launay
- DHU FIRE, Paris, France
- Department for BioMedical Research, University of Bern, Bern, Switzerland
| | - Giuseppina Caligiuri
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- DHU FIRE, Paris, France
- Department of Cardiology, AP-HP, Bichat Hospital, Université Paris Cité, Paris, France
| | - Antonino Nicoletti
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- DHU FIRE, Paris, France
| | - Marie Le Borgne
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, LVTS, Paris, France
- DHU FIRE, Paris, France
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3
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Hove-Skovsgaard M, Høgh J, Pham MHC, Knudsen AD, Gerstoft J, Ostrowski SR, Køber L, Benfield T, Kofoed KF, Nielsen SD. Peripheral T-cell activation, Th17 cells, regulatory T-cells, and aortic aneurysm in people with HIV. AIDS 2023; 37:1765-1767. [PMID: 37534728 DOI: 10.1097/qad.0000000000003612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2023]
Abstract
Here, we investigate if peripheral T-cell activation and proportion of Th17 and T-regulatory cells (Tregs) are associated with aortic aneurysm or aortic diameter in people with HIV. Aorta was examined by computed tomography scans and T-cells by flow cytometry in 428 participants, and aortic aneurysm was found in 32 participants. None of the T-cell subsets were associated with aortic aneurysm, but activated T-cells and Tregs had opposite association to aorta diameter indicating an inverse impact.
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Affiliation(s)
| | | | - Michael Huy Cuong Pham
- Department of Cardiology, The Heart Center, Rigshospitalet, Copenhagen University Hospital
| | | | - Jan Gerstoft
- Department of Infectious Diseases
- Faculty of Health and Medical Sciences, Institute of Clinical Medicine, University of Copenhagen
| | - Sisse Rye Ostrowski
- Faculty of Health and Medical Sciences, Institute of Clinical Medicine, University of Copenhagen
- The Department of Clinical Immunology, Rigshospitalet, Copenhagen University Hospital, Copenhagen
| | - Lars Køber
- Department of Cardiology, The Heart Center, Rigshospitalet, Copenhagen University Hospital
- Faculty of Health and Medical Sciences, Institute of Clinical Medicine, University of Copenhagen
| | - Thomas Benfield
- Faculty of Health and Medical Sciences, Institute of Clinical Medicine, University of Copenhagen
- Department of Infectious Diseases, Hvidovre Hospital, Copenhagen University Hospital, Hvidovre
| | - Klaus Fuglsang Kofoed
- Department of Cardiology, The Heart Center, Rigshospitalet, Copenhagen University Hospital
- Faculty of Health and Medical Sciences, Institute of Clinical Medicine, University of Copenhagen
- Department of Radiology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Susanne Dam Nielsen
- Department of Infectious Diseases
- Faculty of Health and Medical Sciences, Institute of Clinical Medicine, University of Copenhagen
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4
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Filipkowski AM, Kundu S, Eden SK, Alcorn CW, Justice AC, So-Armah KA, Tindle HA, Wells QS, Beckman JA, Freiberg MS, Aday AW. Association of HIV Infection and Incident Abdominal Aortic Aneurysm Among 143 001 Veterans. Circulation 2023; 148:135-143. [PMID: 37226738 PMCID: PMC10443901 DOI: 10.1161/circulationaha.122.063040] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 05/01/2023] [Indexed: 05/26/2023]
Abstract
BACKGROUND People with HIV (PWH) have an increased risk of cardiovascular disease. Previous cross-sectional data suggest there is a higher prevalence of abdominal aortic aneurysm (AAA) in PWH than in those without HIV. Whether PWH have an increased risk of incident AAA compared with those without HIV is unknown. METHODS We analyzed data among participants without prevalent AAA from the Veterans Aging Cohort Study, a prospective, observational, longitudinal cohort of veterans with HIV matched 1:2 with veterans without HIV infection. We calculated AAA rates by HIV status and assessed the association between HIV infection and incident AAA using Cox proportional hazards models. We defined AAA using the International Classification of Diseases, 9th or 10th revision, or Current Procedural Terminology codes and adjusted all models for demographic characteristics, cardiovascular disease risk factors, and substance use. Secondary analyses examined the association between time-varying CD4+ T-cell count or HIV viral load and incident AAA. RESULTS Among 143 001 participants (43 766 with HIV), over a median follow-up of 8.7 years, there were 2431 incident AAA events (26.4% among PWH). Rates of incident AAA per 1000 person-years were similar among PWH (2.0 [95% CI, 1.9-2.2]) and people without HIV (2.2 [95% CI, 2.1-2.3]). There was no evidence that HIV infection increased the risk of incident AAA compared with no HIV infection (adjusted hazard ratio, 1.02 [95% CI, 0.92-1.13]). In adjusted analyses with time-varying CD4+ T-cell counts or HIV viral load, PWH with CD4+ T-cell counts <200 cells/mm3 (adjusted hazard ratio, 1.29 [95% CI, 1.02-1.65]) or HIV viral load ≥500 copies/mL (adjusted hazard ratio, 1.29 [95% CI, 1.09-1.52]) had an increased risk of AAA compared with those without HIV. CONCLUSIONS HIV infection is associated with an increased risk of AAA among those with low CD4+ T-cell counts or elevated HIV viral load over time.
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Affiliation(s)
| | - Suman Kundu
- Vanderbilt Translational and Clinical Cardiovascular Research Center, Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Svetlana K. Eden
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Charles W. Alcorn
- University of Pittsburgh School of Public Health, Pittsburgh, PA, USA
| | - Amy C. Justice
- Veterans Affairs Connecticut Healthcare System, CT, USA
- Department of Internal Medicine, Yale School of Medicine, West Haven, CT, USA
| | - Kaku A. So-Armah
- Division of General Internal Medicine, Boston University School of Medicine, Boston, MA, USA
| | - Hilary A. Tindle
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Quinn S. Wells
- Vanderbilt Translational and Clinical Cardiovascular Research Center, Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Joshua A. Beckman
- Vanderbilt Translational and Clinical Cardiovascular Research Center, Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Matthew S. Freiberg
- Vanderbilt Translational and Clinical Cardiovascular Research Center, Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Veterans Affairs Tennessee Valley Healthcare System, Nashville, TN, USA
| | - Aaron W. Aday
- Vanderbilt Translational and Clinical Cardiovascular Research Center, Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
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5
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Huanggu H, Yang D, Zheng Y. Blood immunological profile of abdominal aortic aneurysm based on autoimmune injury. Autoimmun Rev 2023; 22:103258. [PMID: 36563768 DOI: 10.1016/j.autrev.2022.103258] [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: 11/12/2022] [Accepted: 12/18/2022] [Indexed: 12/24/2022]
Abstract
Abdominal aortic aneurysm (AAA) occupies a large part of aorta aneurysm, and if there's no timely intervention or treatment, the risks of rupture and death would rise sharply. With the depth of research in AAA, more and more evidence showed correlations between AAA and autoimmune injury. Currently, a variety of bioactive peptides and cells have been confirmed to be related with AAA progression. Despite the tremendous progress, more than half researches were sampling from lesion tissues, which would be difficult to obtain. Given that the intrusiveness and convenience, serological test take advantages in initial diagnosis. Here we review blood biomarkers associated with autoimmune injury work in AAA evolution, aiming to make a profile on blood immune substances of AAA and provide a thought for potential clinical practice.
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Affiliation(s)
- Haotian Huanggu
- Department of Vascular Surgery, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Dan Yang
- Department of Computational Biology and Bioinformatics, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yuehong Zheng
- Department of Vascular Surgery, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China; Department of Vascular Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China.
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6
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Xu Y, Liang S, Liang Z, Huang C, Luo Y, Liang G, Wang W. Admission D-dimer to lymphocyte counts ratio as a novel biomarker for predicting the in-hospital mortality in patients with acute aortic dissection. BMC Cardiovasc Disord 2023; 23:69. [PMID: 36740681 PMCID: PMC9900915 DOI: 10.1186/s12872-023-03098-x] [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: 01/05/2022] [Accepted: 01/26/2023] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Inflammatory factors are well-established indicators for vascular disease, but the D-dimer to lymphocyte count ratio (DLR) is not measured in routine clinical care. Screening of DLR in individuals may identify individuals at in-hopital mortality of acute aortic dissection (AD). METHODS A retrospective analysis of clinical data from 2013 to 2020 was conducted to identify which factors were related to in-hospital mortality risk of AD. Baseline clinical features, cardiovascular risk factors, and laboratory parameters were obtained from the hospital database. The end point was in-hospital mortality. Forward conditional logistic regression was performed to identify independent risk factors for AA in-hospital death. The cutoff value of the DLR should be ideally calculated by receiver operating characteristic (ROC) analysis. RESULTS The in-hospital mortality rate was 15% (48 of 320 patients). Patients with in-hospital mortality had a higher admission mean DLR level than the alive group (1740 vs. 1010, P < .05). The cutoff point of DLR was 907. The in-hospital mortality rate in the high-level DLR group was significantly higher than that in the low-level DLR group (P < .05). Univariate analysis showed that 8 of 38 factors were associated with in-hospital mortality (P < .05), including admission WBC, neutrophils, lymphocytes, neutrophils/lymphocytes (NLR), prothrombin time (PT), heart rate (HR), D-dimer, and DLR. In multivariate analysis, DLR (odds ratio [OR] 2.127, 95% CI 1.034-4.373, P = 0.040), HR (odds ratio [OR] 1.016, 95% CI 1.002-1.030, P = 0.029) and PT (odds ratio [OR] 1.231, 95% CI 1.018-1.189, P = 0.032) were determined to be independent predictors of in-hospital mortality (P < .05). CONCLUSION Compared with the common clinical parameters PT and HR, serum DLR level on admission is an uncommon but independent parameter that can be used to assess in-hospital mortality in patients with acute AD.
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Affiliation(s)
- Yansong Xu
- Emergency Surgery Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
- Trauma Center, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Silei Liang
- Medical Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Zheng Liang
- Emergency Surgery Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
- Trauma Center, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Cuiqing Huang
- Emergency Surgery Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
- Trauma Center, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Yihuan Luo
- Emergency Surgery Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
- Trauma Center, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Guanbiao Liang
- Cardiothoracic Surgery Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Wei Wang
- Emergency Surgery Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.
- Trauma Center, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.
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7
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Sénémaud JN, Skarbek C, Vigne J, Rouzet F, Castier Y, Caligiuri G. Molecular Imaging of Experimental Abdominal Aortic Aneurysms Targeting Vascular Homeostasis Disruption via CD31 Shedding. Eur J Vasc Endovasc Surg 2022; 64:735-736. [PMID: 36209963 DOI: 10.1016/j.ejvs.2022.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 08/24/2022] [Accepted: 10/02/2022] [Indexed: 01/13/2023]
Affiliation(s)
- Jean N Sénémaud
- Department of Vascular Surgery, Bichat University Hospital, Paris, France; Université de Paris, Paris, France; Laboratory for Vascular Translational Science, INSERM U1148, Paris, France.
| | - Charles Skarbek
- Laboratory for Vascular Translational Science, INSERM U1148, Paris, France
| | - Jonathan Vigne
- Université de Paris, Paris, France; Laboratory for Vascular Translational Science, INSERM U1148, Paris, France; Nuclear Medicine Department, Bichat University Hospital, Paris, France
| | - Francois Rouzet
- Université de Paris, Paris, France; Nuclear Medicine Department, Bichat University Hospital, Paris, France
| | - Yves Castier
- Department of Vascular Surgery, Bichat University Hospital, Paris, France; Université de Paris, Paris, France
| | - Giuseppina Caligiuri
- Université de Paris, Paris, France; Laboratory for Vascular Translational Science, INSERM U1148, Paris, France
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8
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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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9
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Sluiter TJ, van Buul JD, Huveneers S, Quax PHA, de Vries MR. Endothelial Barrier Function and Leukocyte Transmigration in Atherosclerosis. Biomedicines 2021; 9:328. [PMID: 33804952 PMCID: PMC8063931 DOI: 10.3390/biomedicines9040328] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 03/17/2021] [Accepted: 03/19/2021] [Indexed: 12/24/2022] Open
Abstract
The vascular endothelium is a highly specialized barrier that controls passage of fluids and migration of cells from the lumen into the vessel wall. Endothelial cells assist leukocytes to extravasate and despite the variety in the specific mechanisms utilized by different leukocytes to cross different vascular beds, there is a general principle of capture, rolling, slow rolling, arrest, crawling, and ultimately diapedesis via a paracellular or transcellular route. In atherosclerosis, the barrier function of the endothelium is impaired leading to uncontrolled leukocyte extravasation and vascular leakage. This is also observed in the neovessels that grow into the atherosclerotic plaque leading to intraplaque hemorrhage and plaque destabilization. This review focuses on the vascular endothelial barrier function and the interaction between endothelial cells and leukocytes during transmigration. We will discuss the role of endothelial dysfunction, transendothelial migration of leukocytes and plaque angiogenesis in atherosclerosis.
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Affiliation(s)
- Thijs J. Sluiter
- Department of Vascular Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (T.J.S.); (P.H.A.Q.)
- Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Jaap D. van Buul
- Sanquin Research and Landsteiner Laboratory, Leeuwenhoek Centre for Advanced Microscopy, Swammerdam Institute for Life Sciences, University of Amsterdam, 1066 CX Amsterdam, The Netherlands;
| | - Stephan Huveneers
- Department of Medical Biochemistry, Amsterdam Cardiovascular Sciences, Amsterdam University Medical Center, Location AMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands;
| | - Paul H. A. Quax
- Department of Vascular Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (T.J.S.); (P.H.A.Q.)
- Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
| | - Margreet R. de Vries
- Department of Vascular Surgery, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (T.J.S.); (P.H.A.Q.)
- Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands
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10
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Altered Vascular Extracellular Matrix in the Pathogenesis of Atherosclerosis. J Cardiovasc Transl Res 2021; 14:647-660. [PMID: 33420681 DOI: 10.1007/s12265-020-10091-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 12/01/2020] [Indexed: 12/18/2022]
Abstract
Cardiovascular disease continues to grow as a massive global health burden, with coronary artery disease being one of its most lethal varieties. The pathogenesis of atherosclerosis induces changes in the blood vessel and its extracellular matrix (ECM) in each vascular layer. The alteration of the ECM homeostasis has significant modulatory effects on the inflammatory response, the proliferation and migration of vascular smooth muscle cells, neointimal formation, and vascular fibrosis seen in atherosclerosis. In this literature review, the role of the ECM, the multitude of components, and alterations to these components in the pathogenesis of atherosclerosis are discussed with a focus on versatile cellular phenotypes in the structure of blood vessel. An understanding of the various effects of ECM alterations opens up a plethora of therapeutic options that would mitigate the substantial health toll of atherosclerosis on the global population.
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11
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Abstract
The potential of CD31 as a therapeutic target in atherosclerosis has been considered ever since its cloning in the 1990s, but the exact role played by this molecule in the biologic events underlying atherosclerosis has remained controversial, resulting in the stalling of any therapeutic perspective. Due to the supposed cell adhesive properties of CD31, specific monoclonal antibodies and recombinant proteins were regarded as blocking agents because their use prevented the arrival of leukocytes at sites of acute inflammation. However, the observed effect of those compounds likely resulted from the engagement of the immunomodulatory function of CD31 signaling. This was acknowledged only later though, upon the discovery of CD31's 2 intracytoplasmic tyrosine residues called immunoreceptor tyrosine inhibitory motifs. A growing body of evidence currently points at a therapeutic potential for CD31 agonists in atherothrombosis. Clinical observations show that CD31 expression is altered at the surface of leukocytes infiltrating unhealed atherothrombotic lesions and that the physiological immunomodulatory functions of CD31 are lost at the surface of blood leukocytes in patients with acute coronary syndromes. On the contrary, translational studies using candidate therapeutic molecules in laboratory animals have provided encouraging results: synthetic peptides administered to atherosclerotic mice as systemic drugs in the acute phases of atherosclerotic complications favor the healing of wounded arteries, whereas the immobilization of CD31 agonist peptides onto coronary stents implanted in farm pigs favors their peaceful integration within the coronary arterial wall.
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Affiliation(s)
- Giuseppina Caligiuri
- From the Laboratory for Vascular Translational Science, Inserm U1148, Université de Paris, France; and Department of Cardiology, Assistance Publique-Hôpitaux de Paris, Hôpitaux Universitaires Paris Nord Val-de-Seine, Site Bichat, France
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12
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Angelini G, Flego D, Vinci R, Pedicino D, Trotta F, Ruggio A, Piemontese GP, Galante D, Ponzo M, Biasucci LM, Liuzzo G, Crea F. Matrix metalloproteinase-9 might affect adaptive immunity in non-ST segment elevation acute coronary syndromes by increasing CD31 cleavage on CD4+ T-cells. Eur Heart J 2019; 39:1089-1097. [PMID: 29211854 PMCID: PMC5915953 DOI: 10.1093/eurheartj/ehx684] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 11/02/2017] [Indexed: 12/22/2022] Open
Abstract
Aims In patients with acute coronary syndrome (ACS), the higher activity of effector T-cells suggests that mechanisms involving adaptive immunity dysregulation might play a role in coronary instability. The shedding of the functional CD31 domain 1–5 leads to uncontrolled lymphocyte activation. In experimental models, matrix metalloproteinase-9 (MMP-9) has been implicated in endothelial CD31 cleavage. Interestingly, higher serum levels of MMP-9 have been observed in ACS. We aim to investigate the mechanisms underlying CD31 dysregulation in ACS. Methods and results To assess CD31 cleavage on CD4+ T-cells, we analysed by flow cytometry CD4+ T-cells of 30 ACS, 25 stable angina (SA) patients, and 28 controls (CTRL) using two different CD31 antibodies that specifically recognize domain 1–5 or the non-functional membrane-proximal domain 6. The ratio between the domains was significantly lower in ACS than in SA and CTRL (P = 0.002 ACS vs. SA; P = 0.002 ACS vs. CTRL). After stimulation with anti-CD3/CD28, the 1–5/6 domain ratio was significantly lower in ACS than in SA (P = 0.005). ELISA of supernatants obtained from T-cell receptor-stimulated CD4+ T-cells showed higher production of MMP-9 in ACS than in SA (P < 0.001). CD31 domain 1–5 expression in activated CD4+ T-cells from ACS patients increased after treatment with a specific MMP-9 inhibitor (P = 0.042). Conclusion Our study suggest that enhanced MMP-9 release plays a key role in determining the cleavage and shedding of the functional CD31 domain 1–5 in CD4+ T-cells of ACS patients. This mechanism might represent an important therapeutic target to modulate T-cell dysregulation in ACS. ![]()
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Affiliation(s)
- Giulia Angelini
- Department of Cardiovascular and Thoracic Sciences, Catholic University of the Sacred Heart, Fondazione Policlinico Universitario A. Gemelli, Largo A. Gemelli, 8-00168 Rome, Italy
| | - Davide Flego
- Department of Cardiovascular and Thoracic Sciences, Catholic University of the Sacred Heart, Fondazione Policlinico Universitario A. Gemelli, Largo A. Gemelli, 8-00168 Rome, Italy
| | - Ramona Vinci
- Department of Cardiovascular and Thoracic Sciences, Catholic University of the Sacred Heart, Fondazione Policlinico Universitario A. Gemelli, Largo A. Gemelli, 8-00168 Rome, Italy
| | - Daniela Pedicino
- Department of Cardiovascular and Thoracic Sciences, Catholic University of the Sacred Heart, Fondazione Policlinico Universitario A. Gemelli, Largo A. Gemelli, 8-00168 Rome, Italy
| | - Francesco Trotta
- Department of Cardiovascular and Thoracic Sciences, Catholic University of the Sacred Heart, Fondazione Policlinico Universitario A. Gemelli, Largo A. Gemelli, 8-00168 Rome, Italy
| | - Aureliano Ruggio
- Department of Cardiovascular and Thoracic Sciences, Catholic University of the Sacred Heart, Fondazione Policlinico Universitario A. Gemelli, Largo A. Gemelli, 8-00168 Rome, Italy
| | - Giuseppe P Piemontese
- Department of Cardiovascular and Thoracic Sciences, Catholic University of the Sacred Heart, Fondazione Policlinico Universitario A. Gemelli, Largo A. Gemelli, 8-00168 Rome, Italy
| | - Domenico Galante
- Department of Cardiovascular and Thoracic Sciences, Catholic University of the Sacred Heart, Fondazione Policlinico Universitario A. Gemelli, Largo A. Gemelli, 8-00168 Rome, Italy
| | - Myriana Ponzo
- Department of Cardiovascular and Thoracic Sciences, Catholic University of the Sacred Heart, Fondazione Policlinico Universitario A. Gemelli, Largo A. Gemelli, 8-00168 Rome, Italy
| | - Luigi M Biasucci
- Department of Cardiovascular and Thoracic Sciences, Catholic University of the Sacred Heart, Fondazione Policlinico Universitario A. Gemelli, Largo A. Gemelli, 8-00168 Rome, Italy
| | - Giovanna Liuzzo
- Department of Cardiovascular and Thoracic Sciences, Catholic University of the Sacred Heart, Fondazione Policlinico Universitario A. Gemelli, Largo A. Gemelli, 8-00168 Rome, Italy
| | - Filippo Crea
- Department of Cardiovascular and Thoracic Sciences, Catholic University of the Sacred Heart, Fondazione Policlinico Universitario A. Gemelli, Largo A. Gemelli, 8-00168 Rome, Italy
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13
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Wang Z, Guo J, Han X, Xue M, Wang W, Mi L, Sheng Y, Ma C, Wu J, Wu X. Metformin represses the pathophysiology of AAA by suppressing the activation of PI3K/AKT/mTOR/autophagy pathway in ApoE -/- mice. Cell Biosci 2019; 9:68. [PMID: 31467666 PMCID: PMC6712653 DOI: 10.1186/s13578-019-0332-9] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 08/16/2019] [Indexed: 02/07/2023] Open
Abstract
Background The protective effect of metformin (MET) on abdominal aortic aneurysm (AAA) has been reported. However, the related mechanism is still poor understood. In this study, we deeply investigated the role of metformin in AAA pathophysiology. Methods Angiotensin II (Ang-II) was used to construct the AAA model in ApoE−/− mice. The related mechanism was explored using Western blot and quantitative real time PCR (qRT-PCR). We also observed the morphological changes in the abdominal aorta and the influence of metformin on biological behaviors of rat abdominal aortic VSMCs. Results The PI3K/AKT/mTOR pathway was activated in aneurysmal wall tissues of AAA patients and rat model. Treatment with metformin inhibited the breakage and preserved the elastin structure of the aorta, the loss of collagen, and the apoptosis of aortic cells. In addition, metformin significantly suppressed the activation of the PI3K/AKT/mToR pathway and decreased the mRNA and protein levels of LC3B and Beclin1, which were induced by Ang-II. Moreover, PI3K inhibitors enhanced the effect of metformin while PI3K agonists largely reversed this effect. Interestingly, the cell proliferation, apoptosis, migration and autophagy of vascular smooth muscle cells (VSMCs) induced by Ang-II were also decreased following metformin treatment. PI3K inhibitors and agonists strengthened and weakened the effects of metformin in VSMCs, respectively. Conclusions Metformin represses the pathophysiology of AAA by inhibiting the activation of PI3K/AKT/mTOR/autophagy pathway. This repression may be useful as a new therapeutic strategy for AAA.
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Affiliation(s)
- Zhu Wang
- 1Department of Vascular Surgery, Shandong Provincial Hospital Affiliated to Shandong University, 324 Jing Wu Wei Qi Road, Jinan, 250021 Shandong China.,2Department of Interventional Medicine and Vascular Surgery, Binzhou Medical University Hospital, Binzhou, 256603 Shandong China
| | - Jingjing Guo
- 3Department of Obstetrics and Gynecology, Binzhou Medical University Hospital, Binzhou, 256603 Shandong China
| | - Xinqiang Han
- 2Department of Interventional Medicine and Vascular Surgery, Binzhou Medical University Hospital, Binzhou, 256603 Shandong China
| | - Ming Xue
- 4Department of Interventional Radiology, Weihai Municipal Hospital, Weihai, 264200 Shandong China
| | - Wenming Wang
- 2Department of Interventional Medicine and Vascular Surgery, Binzhou Medical University Hospital, Binzhou, 256603 Shandong China
| | - Lei Mi
- Department of General Surgery, Taian City Central Hospital, Taian, 271000 Shandong China
| | - Yuguo Sheng
- 2Department of Interventional Medicine and Vascular Surgery, Binzhou Medical University Hospital, Binzhou, 256603 Shandong China
| | - Chao Ma
- 2Department of Interventional Medicine and Vascular Surgery, Binzhou Medical University Hospital, Binzhou, 256603 Shandong China
| | - Jian Wu
- 2Department of Interventional Medicine and Vascular Surgery, Binzhou Medical University Hospital, Binzhou, 256603 Shandong China
| | - Xuejun Wu
- 1Department of Vascular Surgery, Shandong Provincial Hospital Affiliated to Shandong University, 324 Jing Wu Wei Qi Road, Jinan, 250021 Shandong China
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14
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O'Carroll L, Wardrop B, Murphy RP, Ross MD, Harrison M. Circulating angiogenic cell response to sprint interval and continuous exercise. Eur J Appl Physiol 2019; 119:743-752. [PMID: 30673849 DOI: 10.1007/s00421-018-04065-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 12/24/2018] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Although commonly understood as immune cells, certain T lymphocyte and monocyte subsets have angiogenic potential, contributing to blood vessel growth and repair. These cells are highly exercise responsive and may contribute to the cardiovascular benefits seen with exercise. PURPOSE To compare the effects of a single bout of continuous (CONTEX) and sprint interval exercise (SPRINT) on circulating angiogenic cells (CAC) in healthy recreationally active adults. METHODS Twelve participants (aged 29 ± 2 years, BMI 25.5 ± 0.9 kg m- 2, [Formula: see text]peak 44.3 ± 1.8 ml kg- 1 min- 1; mean ± SEM) participated in the study. Participants completed a 45-min bout of CONTEX at 70% peak oxygen uptake and 6 × 20 s sprints on a cycle ergometer, in a counterbalanced design. Blood was sampled pre-, post-, 2 h and 24 h post-exercise for quantification of CAC subsets by whole blood flow cytometric analysis. Angiogenic T lymphocytes (TANG) and angiogenic Tie2-expressing monocytes (TEM) were identified by the expression of CD31 and Tie2, respectively. RESULTS Circulating (cells µL- 1) CD3+CD31+ TANG increased immediately post-exercise in both trials (p < 0.05), with a significantly greater increase (p < 0.05) following SPRINT (+ 57%) compared to CONTEX (+ 14%). Exercise increased (p < 0.05) the expression of the chemokine receptor CXCR4 on TANG at 24 h. Tie2-expressing classical (CD14++CD16-), intermediate (CD14++CD16+) and non-classical (CD14+CD16++) monocytes and circulating CD34+CD45dim progenitor cells were higher post-exercise in SPRINT, but unchanged in CONTEX. All post-exercise increases in SPRINT were back to pre-exercise levels at 2 h and 24 h. CONCLUSION Acute exercise transiently increases circulating TANG, TEM and progenitor cells with greater increases evident following very high intensity sprint exercise than following prolonged continuous paced endurance exercise.
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Affiliation(s)
- Louis O'Carroll
- Department of Sport and Exercise Science, Waterford Institute of Technology, Waterford, Ireland
| | - Bruce Wardrop
- Department of Sport and Exercise Science, Waterford Institute of Technology, Waterford, Ireland
| | - Ronan P Murphy
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | - Mark D Ross
- School of Applied Sciences, Edinburgh Napier University, Edinburgh, UK
| | - Michael Harrison
- Department of Sport and Exercise Science, Waterford Institute of Technology, Waterford, Ireland.
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15
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Exploring antibody-dependent adaptive immunity against aortic extracellular matrix components in experimental aortic aneurysms. J Vasc Surg 2018. [PMID: 29519688 DOI: 10.1016/j.jvs.2017.11.090] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Recent evidence suggests that adaptive immunity develops during abdominal aortic aneurysm evolution. Uncertainties remain about the antigens implicated and their role in inducing rupture. Because antigens from the extracellular matrix (ECM) have been suspected, the aim of this experimental study was to characterize the role of adaptive immunity directed against antigens from the aortic ECM. METHODS In a first step, an experimental model of abdominal aortic aneurysm rupture based on adaptive immunity against the ECM was developed and characterized. Forty 4-week-old male Lewis rats were divided into two groups. In the ECM group (n = 20), rats were presensitized against the guinea pig aortic ECM before implantation of a decellularized aortic xenograft (DAX). In the control group (n = 20), rats were not presensitized before DAX implantation. In each group, half the rats were sacrificed at day 3 to analyze early mechanisms involved after DAX implantation. In a second step, we aimed to assess which ECM component was most efficient in inducing rupture. For this purpose, the nonfibrillar and fibrillar ECM components were sequentially extracted from the guinea pig aortic wall. Forty Lewis rats were then divided into four groups. Each group was presensitized against one ECM component (structural glycoproteins and proteoglycans, collagen, elastin alone, and elastin-associated glycoproteins) before DAX implantation. Apart from those that experienced rupture, rats were sacrificed at day 21. Xenografts were harvested for histologic, immunofluorescence, and conditioned medium analyses. RESULTS In total, early aortic rupture occurred in 80% of the ECM group vs 0% of the control group (P < .001). In the ECM group, major circumferential immunoglobulin deposits were observed in combination with the C3 complement fraction, without cell infiltration. Conditioned medium analysis revealed that matrix metalloproteinase 9 and myeloperoxidase levels and elastase activities were significantly increased in this group. Immunofluorescence analysis demonstrated that myeloperoxidase co-localized with tissue-free DNA and histone H4, highlighting local neutrophil activation and formation of neutrophil extracellular traps. Following differential presensitization, it appeared that rats presensitized against structural glycoproteins and proteoglycans were significantly more susceptible to rupture after DAX implantation. CONCLUSIONS Stimulating adaptive immunity against the aortic ECM, especially structural glycoproteins and proteoglycans, triggers rupture after DAX implantation. Further studies are needed to assess the precise proteins involved.
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16
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Madrigal-Matute J, Blanco-Colio LM, Esteban-Salan M, Torres-Fonseca M, Lefebvre T, Delbosc S, Laustsen J, Driss F, de Ceniga M, Gouya L, Egido J, Meilhac O, Michel JB, Martin-Ventura JL, Martinez-Pinna R, Lindholt JS, Weiss G. From tissue iron retention to low systemic haemoglobin levels, new pathophysiological biomarkers of human abdominal aortic aneurysm. Thromb Haemost 2017; 112:87-95. [DOI: 10.1160/th13-08-0721] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Accepted: 02/06/2014] [Indexed: 11/05/2022]
Abstract
SummaryIron deposits are observed in tissue of abdominal aortic aneurysm (AAA) patients, although the underlying mechanisms are not completely elucidated. Therefore we explored circulating markers of iron metabolism in AAA patients, and tested if they could serve as biomarkers of AAA. Increased red blood cell (RBC)-borne iron retention and transferrin, transferrin receptor and ferritin expression was observed in AAA tissue compared to control aorta (immunohistochemistry and western blot). In contrast, decreased circulating iron, transferrin, mean corpuscular haemoglobin concentration (MCHC) and haemoglobin concentration, along with circulating RBC count, were observed in AAA patients (aortic diameter >3 cm, n=114) compared to controls (aortic diameter <3 cm, n=88) (ELISA), whereas hepcidin concentrations were increased in AAA subjects (MS/MS assay). Moreover, iron, transferrin and haemoglobin levels were negatively, and hepcidin positively, correlated with aortic diameter in AAA patients. The association of low haemoglobin with AAA presence or aortic diameter was independent of specific risk factors. Moreover, MCHC negatively correlated with thrombus area in another cohort of AAA patients (aortic diameter 3–5 cm, n=357). We found that anaemia was significantly more prevalent in AAA patients (aortic diameter >5 cm, n=8,912) compared to those in patients with atherosclerotic aorto-iliac occlusive disease (n=17,737) [adjusted odds ratio=1.77 (95% confidence interval: 1.61;1.93)]. Finally, the mortality risk among AAA patients with anaemia was increased by almost 30% [adjusted hazard ratio: 1.29 (95% confidence interval: 1.16;1.44)] as compared to AAA subjects without anaemia. In conclusion, local iron retention and altered iron recycling associated to high hepcidin and low transferrin systemic concentrations could lead to reduced circulating haemoglobin levels in AAA patients. Low haemoglobin levels are independently associated to AAA presence and clinical outcome.
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17
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Increased galectin-3 levels are associated with abdominal aortic aneurysm progression and inhibition of galectin-3 decreases elastase-induced AAA development. Clin Sci (Lond) 2017; 131:2707-2719. [PMID: 28982723 DOI: 10.1042/cs20171142] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 09/29/2017] [Accepted: 10/02/2017] [Indexed: 01/28/2023]
Abstract
Abdominal aortic aneurysm (AAA) evolution is unpredictable and no specific treatment exists for AAA, except surgery to prevent aortic rupture. Galectin-3 has been previously associated with CVD, but its potential role in AAA has not been addressed. Galectin-3 levels were increased in the plasma of AAA patients (n=225) compared with the control group (n=100). In addition, galectin-3 concentrations were associated with the need for surgical repair, independently of potential confounding factors. Galectin-3 mRNA and protein expression were increased in human AAA samples compared with healthy aortas. Experimental AAA in mice was induced via aortic elastase perfusion. Mice were treated intravenously with the galectin-3 inhibitor modified citrus pectin (MCP, 10 mg/kg, every other day) or saline. Similar to humans, galectin-3 serum and aortic mRNA levels were also increased in elastase-induced AAA mice compared with control mice. Mice treated with MCP showed decreased aortic dilation, as well as elastin degradation, vascular smooth muscle cell (VSMC) loss, and macrophage content at day 14 postelastase perfusion compared with control mice. The underlying mechanism(s) of the protective effect of MCP was associated with a decrease in galectin-3 and cytokine (mainly CCL5) mRNA and protein expression. Interestingly, galectin-3 induced CCL5 expression by a mechanism involving STAT3 activation in VSMC. Accordingly, MCP treatment decreased STAT3 phosphorylation in elastase-induced AAA. In conclusion, increased galectin-3 levels are associated with AAA progression, while galectin-3 inhibition decreased experimental AAA development. Our data suggest the potential role of galectin-3 as a therapeutic target in AAA.
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18
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Sass FA, Schmidt-Bleek K, Ellinghaus A, Filter S, Rose A, Preininger B, Reinke S, Geissler S, Volk HD, Duda GN, Dienelt A. CD31+ Cells From Peripheral Blood Facilitate Bone Regeneration in Biologically Impaired Conditions Through Combined Effects on Immunomodulation and Angiogenesis. J Bone Miner Res 2017; 32:902-912. [PMID: 27976803 DOI: 10.1002/jbmr.3062] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 12/07/2016] [Accepted: 12/12/2016] [Indexed: 12/30/2022]
Abstract
Controlled revascularization and inflammation are key elements regulating endogenous regeneration after (bone) tissue trauma. Peripheral blood-derived cell subsets, such as regulatory T-helper cells and circulating (endothelial) progenitor cells, respectively, can support endogenous tissue healing, whereas effector T cells that are associated with an aged immune system can hinder bone regeneration. CD31 is expressed by diverse leukocytes and is well recognized as a marker of circulating endothelial (precursor) cells; however, CD31 is absent from the surface of differentiated effector T cells. Thus, we hypothesized that by separating the inhibitory fractions from the supportive fractions of circulating cells within the peripheral blood (PB) using the CD31 marker, bone regeneration in biologically compromised conditions, such as those observed in aged patients, could be improved. In support of our hypothesis, we detected an inverse correlation between CD31+ cells and effector T cells in the hematomas of human fracture patients, dependent on the age of the patient. Furthermore, we demonstrated the regenerative capacity of human PB-CD31+ cells in vitro. These findings were translated to a clinically relevant rat model of impaired bone healing. The transplantation of rat PB-CD31+ cells advanced bone tissue restoration in vivo and was associated with an early anti-inflammatory response, the stimulation of (re)vascularization, and reduced fibrosis. Interestingly, the depletion or enrichment of the highly abundant CD31+/14+ monocytes from the mixed CD31+ cell population diminished tissue regeneration at different levels, suggesting combined effects within the PB-CD31+ subsets. In summary, an intraoperative enrichment of PB-CD31+ cells might be a novel option to facilitate endogenous regeneration under biologically impaired situations by supporting immunomodulation and vascularization. © 2016 American Society for Bone and Mineral Research.
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Affiliation(s)
- F Andrea Sass
- Julius Wolff Institute (JWI) and Center for Musculoskeletal Surgery, Charité - University Medicine Berlin, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité - University Medicine Berlin, Berlin, Germany
| | - Katharina Schmidt-Bleek
- Julius Wolff Institute (JWI) and Center for Musculoskeletal Surgery, Charité - University Medicine Berlin, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité - University Medicine Berlin, Berlin, Germany
| | - Agnes Ellinghaus
- Julius Wolff Institute (JWI) and Center for Musculoskeletal Surgery, Charité - University Medicine Berlin, Berlin, Germany
| | - Sebastian Filter
- Julius Wolff Institute (JWI) and Center for Musculoskeletal Surgery, Charité - University Medicine Berlin, Berlin, Germany
| | - Alexander Rose
- Julius Wolff Institute (JWI) and Center for Musculoskeletal Surgery, Charité - University Medicine Berlin, Berlin, Germany
| | - Bernd Preininger
- Center for Musculoskeletal Surgery, Charité - University Medicine Berlin, Berlin, Germany
| | - Simon Reinke
- Julius Wolff Institute (JWI) and Center for Musculoskeletal Surgery, Charité - University Medicine Berlin, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité - University Medicine Berlin, Berlin, Germany
| | - Sven Geissler
- Julius Wolff Institute (JWI) and Center for Musculoskeletal Surgery, Charité - University Medicine Berlin, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité - University Medicine Berlin, Berlin, Germany
| | - Hans-Dieter Volk
- Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité - University Medicine Berlin, Berlin, Germany.,Institute of Medical Immunology, Charité - University Medicine Berlin, Berlin, Germany
| | - Georg N Duda
- Julius Wolff Institute (JWI) and Center for Musculoskeletal Surgery, Charité - University Medicine Berlin, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité - University Medicine Berlin, Berlin, Germany
| | - Anke Dienelt
- Julius Wolff Institute (JWI) and Center for Musculoskeletal Surgery, Charité - University Medicine Berlin, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité - University Medicine Berlin, Berlin, Germany
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19
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Boeckh-Behrens T, Kleine J, Kaesmacher J, Zimmer C, Schirmer L, Simon S, Poppert H. The CD31 molecule: a possible neuroprotective agent in acute ischemic stroke? Thromb J 2017; 15:11. [PMID: 28413360 PMCID: PMC5390341 DOI: 10.1186/s12959-017-0134-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Accepted: 04/08/2017] [Indexed: 01/01/2023] Open
Abstract
Background The transmembrane receptor molecule CD31 is known to have immunomodulatory functions, suggesting a possible neuroprotective effect in the context of acute ischemic stroke by restricting an over-activation of secondary immunological processes. This study examines the density of CD31+ cells in mechanically extracted thrombi of stroke patients with the aim to test whether the occurrence of CD31+ cells was associated with a beneficial clinical outcome in those patients. Methods Thrombi of 122 consecutive patients with large anterior circulation stroke were collected during intracranial mechanical recanalization. Out of these, 86 immunostained specimens of adequate quality could be analysed. The density of CD31+ cells was quantified and compared with clinical outcome data of the affected patients. Results The density of CD31+ cells was positively related to early patient improvement (ΔNIHSS, r = 0.283, p = 0,012) with an even clearer relationship after exclusion of patients who died in the early hospital phase (r = 0.371, p = 0.001). This finding stayed stable also in the multivariate analysis after corrrection for other outcome-influencing factors (p = 0.049). Conclusion This study shows a stable relation between CD31+ cells and early clinical improvement of patients with acute ischemic stroke. This finding is in line with recent reports showing immunomodulatory and potential neuroprotective effects of CD31, suggesting that CD31 may be a promising neuroprotective agent in stroke patients.
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Affiliation(s)
- Tobias Boeckh-Behrens
- Department of Neuroradiology, University Hospital Rechts der Isar, Technical University Munich, Ismaninger Str. 22, 81675 Munich, Germany
| | - Justus Kleine
- Department of Neuroradiology, Vivantes Klinikum Neukölln, Rudowerstr. 48, 12351 Berlin, Germany
| | - Johannes Kaesmacher
- Department of Neuroradiology, University Hospital Rechts der Isar, Technical University Munich, Ismaninger Str. 22, 81675 Munich, Germany
| | - Claus Zimmer
- Department of Neuroradiology, University Hospital Rechts der Isar, Technical University Munich, Ismaninger Str. 22, 81675 Munich, Germany
| | - Lucas Schirmer
- Department of Neurology, University Hospital Rechts der Isar, Technical University Munich, Ismaninger Str. 22, 81675 Munich, Germany
| | - Sophie Simon
- Department of Neurology, University Hospital Rechts der Isar, Technical University Munich, Ismaninger Str. 22, 81675 Munich, Germany
| | - Holger Poppert
- Department of Neurology, University Hospital Rechts der Isar, Technical University Munich, Ismaninger Str. 22, 81675 Munich, Germany
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20
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Fernandez-García CE, Burillo E, Lindholt JS, Martinez-Lopez D, Pilely K, Mazzeo C, Michel JB, Egido J, Garred P, Blanco-Colio LM, Martin-Ventura JL. Association of ficolin-3 with abdominal aortic aneurysm presence and progression. J Thromb Haemost 2017; 15:575-585. [PMID: 28039962 DOI: 10.1111/jth.13608] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Indexed: 02/05/2023]
Abstract
Essentials Abdominal aortic aneurysm (AAA) is asymptomatic and its evolution unpredictable. To find novel potential biomarkers of AAA, microvesicles are an excellent source of biomarkers. Ficolin-3 is increased in microvesicles obtained from activated platelets and AAA tissue. Increased ficolin-3 plasma levels are associated with AAA presence and progression. SUMMARY Background Abdominal aortic aneurysm (AAA) patients are usually asymptomatic and AAA evolution is unpredictable. Ficolin-3, mainly synthesized by the liver, is a molecule of the lectin complement-activation pathway involved in AAA pathophysiology. Objectives To define extra-hepatic sources of ficolin-3 in AAA and investigate the role of ficolin-3 as a biomarker of the presence and progression of AAA. Methods Microvesicles (exosomes and microparticles) were isolated from culture-conditioned medium of ADP-activated platelets, as well as from AAA tissue-conditioned medium (thrombus and wall). Ficolin-3 levels were analyzed by western-blot, real-time PCR, immunohistochemistry and ELISA. Results Increased ficolin-3 levels were observed in microvesicles isolated from activated platelets. Similarly, microvesicles released from AAA tissue display increased ficolin-3 levels as compared with those from healthy tissue. Moreover, ficolin-3 mRNA levels in the AAA wall were greatly increased compared with healthy aortic walls. Immunohistochemistry of AAA tissue demonstrated increased ficolin-3, whereas little staining was present in healthy walls. Finally, increased ficolin-3 levels were observed in AAA patients' plasma (n = 478) compared with control plasma (n = 176), which persisted after adjustment for risk factors (adjusted odds ratio [OR], 5.29; 95% confidence interval [CI], 3.27, 8.57)]. Moreover, a positive association of ficolin-3 with aortic diameter (Rho, 0.25) and need for surgical repair was observed, also after adjustment for potential confounding factors (adjusted hazard ratio, 1.55; 95% CI, 1.11, 2.15). Conclusions In addition to its hepatic expression, ficolin-3 may be released into the extracellular medium via microvesicles, by both activated cells and pathological AAA tissue. Ficolin-3 plasma levels are associated with the presence and progression of AAA, suggesting its potential role as a biomarker of AAA.
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Affiliation(s)
- C-E Fernandez-García
- Vascular Research Laboratory, FIIS-Fundación Jiménez Díaz-Autonoma University, Madrid, Spain
| | - E Burillo
- Vascular Research Laboratory, FIIS-Fundación Jiménez Díaz-Autonoma University, Madrid, Spain
| | - J S Lindholt
- Department of Thoracic, Heart and Vascular Surgery, University Hospital of Odense, Odense, Denmark
| | - D Martinez-Lopez
- Vascular Research Laboratory, FIIS-Fundación Jiménez Díaz-Autonoma University, Madrid, Spain
| | - K Pilely
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Sect.7631, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - C Mazzeo
- Department of Cell Biology and Immunology, Molecular Biology Center/CSIC-UAM, Madrid, Spain
| | - J-B Michel
- Inserm, U1148, Université Paris 7, CHU X-Bichat, Paris, France
| | - J Egido
- Vascular Research Laboratory, FIIS-Fundación Jiménez Díaz-Autonoma University, Madrid, Spain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Madrid, Spain
| | - P Garred
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Sect.7631, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - L M Blanco-Colio
- Vascular Research Laboratory, FIIS-Fundación Jiménez Díaz-Autonoma University, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - J L Martin-Ventura
- Vascular Research Laboratory, FIIS-Fundación Jiménez Díaz-Autonoma University, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
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21
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Huang L, Zheng Y, Yuan X, Ma Y, Xie G, Wang W, Chen H, Shen L. Decreased frequencies and impaired functions of the CD31 + subpopulation in T reg cells associated with decreased FoxP3 expression and enhanced T reg cell defects in patients with coronary heart disease. Clin Exp Immunol 2016; 187:441-454. [PMID: 27997991 DOI: 10.1111/cei.12897] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/02/2016] [Indexed: 02/03/2023] Open
Abstract
Coronary heart disease (CHD) is one of the most common types of organ lesions caused by atherosclerosis, in which CD4+ CD25+ forkhead box protein 3 (FoxP3+ ) regulatory T cells (Treg ) play an atheroprotective role. However, Treg cell numbers are decreased and their functions are impaired in atherosclerosis; the underlying mechanisms remain unclear. CD31 plays an important part in T cell response and contributes to maintaining T cell tolerance. The immunomodulatory effects of CD31 are also implicated in atherosclerosis. In this study, we found that decreased frequencies of the CD31+ subpopulation in Treg cells (CD31+ Tr cells) correlated positively with decreased FoxP3 expression in CHD patients. Cell culture in vitro demonstrated CD31+ Tr cells maintaining stable FoxP3 expression after activation and exhibited enhanced proliferation and immunosuppression compared with the CD31- subpopulation in Treg cells (CD31- Tr cells). We also confirmed impaired secretion of transforming growth factor (TGF)-β1 and interleukin (IL)-10 in CD31+ Tr cells of CHD patients. Further analysis revealed reduced phospho-SHP2 (associated with CD31 activation) and phospho-signal transducer and activator of transcription-5 (STAT-5) (associated with FoxP3 transcription) levels in CD31+ Tr cells of CHD patients, suggesting that decreased FoxP3 expression in CD31+ Tr cells might be because of attenuated SHP2 and STAT-5 activation. These data indicate that decreased frequencies and impaired functions of the CD31+ Tr subpopulation associated with decreased FoxP3 expression give rise, at least in part, to Treg cell defects in CHD patients. Our findings emphasize the important role of the CD31+ Tr subpopulation in maintaining Treg cell normal function and may provide a novel explanation for impaired immunoregulation of Treg cells in CHD.
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Affiliation(s)
- L Huang
- Department of Clinical Laboratory, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Y Zheng
- Department of Clinical Laboratory, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - X Yuan
- Department of Clinical Laboratory, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Y Ma
- Department of Clinical Laboratory, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - G Xie
- Department of Clinical Laboratory, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - W Wang
- Department of Clinical Laboratory, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - H Chen
- Department of Clinical Laboratory, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - L Shen
- Department of Clinical Laboratory, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
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22
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Flego D, Liuzzo G, Weyand CM, Crea F. Adaptive Immunity Dysregulation in Acute Coronary Syndromes: From Cellular and Molecular Basis to Clinical Implications. J Am Coll Cardiol 2016; 68:2107-2117. [PMID: 27810051 PMCID: PMC5651170 DOI: 10.1016/j.jacc.2016.08.036] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 08/09/2016] [Accepted: 08/16/2016] [Indexed: 11/25/2022]
Abstract
Although the early outcome of acute coronary syndrome (ACS) has considerably improved in the last decade, cardiovascular diseases still represent the main cause of morbidity and mortality worldwide. This is mainly because recurrence of ACS eventually leads to the pandemics of heart failure and sudden cardiac death, thus calling for a reappraisal of the mechanisms responsible for coronary instability. This review discusses recent advances in our understanding of how adaptive immunity contributes to the pathogenesis of ACS and the clinical implications that arise from these new pathogenic concepts.
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Affiliation(s)
- Davide Flego
- Institute of Cardiology, Catholic University, Rome, Italy
| | | | - Cornelia M Weyand
- Division of Immunology and Rheumatology, Stanford University, Stanford, California
| | - Filippo Crea
- Institute of Cardiology, Catholic University, Rome, Italy
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23
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Tarín C, Fernandez-Garcia CE, Burillo E, Pastor-Vargas C, Llamas-Granda P, Castejón B, Ramos-Mozo P, Torres-Fonseca MM, Berger T, Mak TW, Egido J, Blanco-Colio LM, Martín-Ventura JL. Lipocalin-2 deficiency or blockade protects against aortic abdominal aneurysm development in mice. Cardiovasc Res 2016; 111:262-73. [DOI: 10.1093/cvr/cvw112] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 05/21/2016] [Indexed: 11/13/2022] Open
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24
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Le Borgne M, Caligiuri G, Nicoletti A. Once Upon a Time: The Adaptive Immune Response in Atherosclerosis--a Fairy Tale No More. Mol Med 2015; 21 Suppl 1:S13-8. [PMID: 26605642 DOI: 10.2119/molmed.2015.00027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 02/03/2015] [Indexed: 01/06/2023] Open
Abstract
Extensive research has been carried out to decipher the function of the adaptive immune response in atherosclerosis, with the expectation that it will pave the road for the design of immunomodulatory therapies that will prevent or reverse the progression of the disease. All this work has led to the concept that some T- and B-cell subsets are proatherogenic, whereas others are atheroprotective. In addition to the immune response occurring in the spleen and lymph nodes, it has been shown that lymphoid neo-genesis takes place in the adventitia of atherosclerotic vessels, leading to the formation of tertiary lymphoid organs where an adaptive immune response can be mounted. Whereas the mechanisms orchestrating the formation of these organs are becoming better understood, their impact on atherosclerosis progression remains unclear. Several potential therapeutic strategies against atherosclerosis, such as protective vaccination against atherosclerosis antigens or inhibiting the activation of proatherogenic B cells, have been proposed based on our improving knowledge of the role of the immune system in atherosclerosis. These strategies have shown success in preclinical studies, giving hope that they will lead to clinical applications.
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Affiliation(s)
- Marie Le Borgne
- Unité 1148, Institut National de la Santé et de la Recherche Médicale (INSERM), Hôpital Xavier Bichat, Paris, France; Université Paris Diderot, Sorbonne Paris Cité, Paris, France; Département Hospitalo-Universitaire DHU FIRE, Paris, France
| | - Giuseppina Caligiuri
- Unité 1148, Institut National de la Santé et de la Recherche Médicale (INSERM), Hôpital Xavier Bichat, Paris, France; Université Paris Diderot, Sorbonne Paris Cité, Paris, France; Département Hospitalo-Universitaire DHU FIRE, Paris, France
| | - Antonino Nicoletti
- Unité 1148, Institut National de la Santé et de la Recherche Médicale (INSERM), Hôpital Xavier Bichat, Paris, France; Université Paris Diderot, Sorbonne Paris Cité, Paris, France; Département Hospitalo-Universitaire DHU FIRE, Paris, France
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25
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Chang TW, Gracon ASA, Murphy MP, Wilkes DS. Exploring autoimmunity in the pathogenesis of abdominal aortic aneurysms. Am J Physiol Heart Circ Physiol 2015; 309:H719-27. [DOI: 10.1152/ajpheart.00273.2015] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Accepted: 06/22/2015] [Indexed: 12/14/2022]
Abstract
The abdominal aortic aneurysm (AAA) is a disease process that carries significant morbidity and mortality in the absence of early identification and treatment. While current management includes surveillance and surgical treatment of low- and high-risk aneurysms, respectively, our narrow understanding of the pathophysiology of AAAs limits our ability to more effectively manage and perhaps even prevent the occurrence of this highly morbid disease. Over the past couple of decades, there has been considerable interest in exploring the role of autoimmunity as an etiological component of AAA. This review covers the current literature pertaining to this immunological process, focusing on research that highlights the local and systemic immune components found in both human patients and murine models. A better understanding of the autoimmune mechanisms in the pathogenesis of AAAs can pave the way to novel and improved treatment strategies in this patient population.
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Affiliation(s)
- Tiffany W. Chang
- Department of Surgery, Indiana University School of Medicine, Indianapolis, Indiana; and
| | - Adam S. A. Gracon
- Department of Surgery, Indiana University School of Medicine, Indianapolis, Indiana; and
| | - Michael P. Murphy
- Department of Surgery, Indiana University School of Medicine, Indianapolis, Indiana; and
| | - David S. Wilkes
- Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
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26
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Rubio-Navarro A, Amaro Villalobos JM, Lindholt JS, Buendía I, Egido J, Blanco-Colio LM, Samaniego R, Meilhac O, Michel JB, Martín-Ventura JL, Moreno JA. Hemoglobin induces monocyte recruitment and CD163-macrophage polarization in abdominal aortic aneurysm. Int J Cardiol 2015; 201:66-78. [PMID: 26296046 DOI: 10.1016/j.ijcard.2015.08.053] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 07/21/2015] [Accepted: 08/02/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND Increased hemoglobin (Hb) accumulation was reported in abdominal aortic aneurysms (AAAs). CD163 is a macrophage receptor involved in tissue Hb clearance, however its role in AAA has not been reported. We investigated the role of Hb on monocyte recruitment and differentiation towards CD163 expressing macrophages ex vivo, in vitro and in human AAA. METHODS AND RESULTS CD163 mRNA and protein expression was significantly higher in human AAA (n=7) vs. healthy wall (n=6). CD163 was predominantly found in adventitia of AAA, coinciding with areas rich in hemosiderin and adjacent to neoangiogenic microvessels. Dual CD14/CD163 expression was observed in recently infiltrated monocytes surrounding microvessels. A higher release of soluble CD163 was observed in the conditioned medium from AAA (AAA-CM, n=10), mainly in the adventitial layer. Similar to Hb, AAA-CM induced CD163-dependent monocyte chemotaxis, especially on circulating monocytes from AAA patients. Hb or AAA-CM promoted differentiation towards CD163(high)/HLA-DR(low)-expressing macrophages, with enhanced Hb uptake, increased anti-inflammatory IL-10 secretion and decreased pro-inflammatory IL-12p40 release. All these effects were partially suppressed when Hb was removed from AAA-CM. Separate analysis on circulating monocytes reported increased percentage of pre-infiltrating CD14(++)CD16(+) monocytes in patients with AAA (n=21), as compared to controls (n=14). A significant increase in CD163 expression in CD14(++)CD16(+) monocyte subpopulation was observed in AAA patients. CONCLUSIONS The presence of Hb in the adventitial AAA-wall promotes the migration and differentiation of activated circulating monocytes in AAA patients, explaining the existence of a protective CD163-macrophage phenotype that could take up the Hb present in the AAA-wall, avoiding its injurious effects.
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Affiliation(s)
- Alfonso Rubio-Navarro
- Vascular, Renal and Diabetes Research Lab., IIS-Fundación Jiménez Díaz, Autónoma University, Madrid, Spain
| | | | - Jes S Lindholt
- Elitary Research Centre of Individualized Medicine in Arterial Disease (CIMA), Department of Cardiothoracic and Vascular Surgery, Odense University Hospital, Denmark
| | - Irene Buendía
- Vascular, Renal and Diabetes Research Lab., IIS-Fundación Jiménez Díaz, Autónoma University, Madrid, Spain
| | - Jesús Egido
- Vascular, Renal and Diabetes Research Lab., IIS-Fundación Jiménez Díaz, Autónoma University, Madrid, Spain; Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM), Spain
| | - Luis Miguel Blanco-Colio
- Vascular, Renal and Diabetes Research Lab., IIS-Fundación Jiménez Díaz, Autónoma University, Madrid, Spain
| | - Rafael Samaniego
- Confocal Microscopy Unit, Hospital General Universitario Gregorio Marañón, Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
| | - Olivier Meilhac
- INSERM U1188 Diabète athérothrombose Thérapies Réunion Océan Indien (DéTROI), Université de La Réunion, CHU de La Réunion, Saint-Denis, France
| | - Jean Baptiste Michel
- INSERM UMRS 1148 Laboratory for Vascular Translational Science, Bichat Hospital, Paris, France
| | - José Luis Martín-Ventura
- Vascular, Renal and Diabetes Research Lab., IIS-Fundación Jiménez Díaz, Autónoma University, Madrid, Spain
| | - Juan Antonio Moreno
- Vascular, Renal and Diabetes Research Lab., IIS-Fundación Jiménez Díaz, Autónoma University, Madrid, Spain.
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27
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Zhang L, Wang Y. B lymphocytes in abdominal aortic aneurysms. Atherosclerosis 2015; 242:311-7. [PMID: 26233918 DOI: 10.1016/j.atherosclerosis.2015.07.036] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Revised: 06/29/2015] [Accepted: 07/20/2015] [Indexed: 01/13/2023]
Abstract
Abdominal aortic aneurysm (AAA) is a progressive inflammatory disease of the artery walls. Immune cells, including B lymphocytes, are implicated in the pathogenesis of AAA through interconnected mechanisms. Many studies have shown that compared with normal abdominal aortic tissue, the amount of B lymphocytes that infiltrate the adventitia of AAAs was significantly higher. Activated B lymphocytes promote AAA by producing immunoglobulins, cytokines, and matrix metalloproteinases (MMPs), resulting in the activation of macrophages, mast cells (MCs) and complement pathways. Finally, all of these factors lead to the degradation of collagen and matrix proteins and to aortic wall remodeling, which are hallmarks of AAA. However, few studies focus on the relative function of B cells, and their precise mechanisms in AAA remain unclear. Thus, we summarize the current knowledge on the role of B cells in AAA and offer recommendations for further investigation of preventing the progression of AAA.
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Affiliation(s)
- Lili Zhang
- Department of Cardiology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200080, China
| | - Yi Wang
- Department of Cardiology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200080, China.
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28
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Flego D, Severino A, Trotta F, Previtero M, Ucci S, Zara C, Pedicino D, Massaro G, Biasucci LM, Liuzzo G, Crea F. Altered CD31 expression and activity in helper T cells of acute coronary syndrome patients. Basic Res Cardiol 2014; 109:448. [PMID: 25344833 DOI: 10.1007/s00395-014-0448-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 10/13/2014] [Accepted: 10/15/2014] [Indexed: 12/20/2022]
Abstract
In acute coronary syndrome (ACS), T cell abnormalities are associated to a worse outcome. Loss of inhibitory activity of CD31, an Ig-like adhesion molecule, on peripheral leukocytes has been found to enhance atherosclerosis in experimental models. In this study, we examined the expression of CD31 on T cells, and its role on TCR signaling in 35 patients with non-ST elevation ACS, in 35 patients with stable angina (SA), and in 35 controls. Furthermore, 10 ACS and 10 SA patients were re-analyzed at 1-year follow-up. Flow-cytometry analysis showed that in ACS patients, CD31 expression was reduced on total CD4(+) and CD4(+)CD28(null) (P < 0.001, ACS vs. SA), on naïve (P < 0.001, ACS vs. SA) and on central-memory and effector-memory CD4(+) T cells (P < 0.05, ACS vs. SA and controls). The immunomodulatory effect of CD31 on TCR signaling of CD4(+) and CD4(+)CD28(null) T cells, was lower in ACS than SA patients (P < 0.05, for both comparisons). At 1-year follow-up, CD31 expression and function increased in ACS becoming similar to that found in SA. CD31 recruitment in the immunological synapse was lower in ACS than controls (P = 0.012). Moreover, CD31 modulated MAPK signaling and reduced the expression of T bet and Rorγ-t, necessary for Th1 and Th17 differentiation. Finally, we studied TCR signaling in CD31(+) naïve and primed T cell subsets observing a different pattern of protein phosphorylation. A CD31-mediated regulatory pathway is enhanced in SA and temporarily downregulated in ACS. As CD31 modulates both T cell activation, by increasing the threshold for TCR stimulation, and T cell differentiation, it might represent a novel molecular target to treat T cell abnormalities in ACS.
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Affiliation(s)
- Davide Flego
- Institute of Cardiology, Catholic University, Largo A. Gemelli, 8, 00168, Rome, Italy
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29
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T lymphocytes and aortic aneurysms. SCIENCE CHINA-LIFE SCIENCES 2014; 57:795-801. [DOI: 10.1007/s11427-014-4699-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 06/19/2014] [Indexed: 11/27/2022]
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30
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Tarín C, Fernández-Laso V, Sastre C, Madrigal-Matute J, Gómez M, Zaragoza C, Egido J, Burkly LC, Martín-Ventura JL, Blanco-Colio LM. Tumor necrosis factor-like weak inducer of apoptosis or Fn14 deficiency reduce elastase perfusion-induced aortic abdominal aneurysm in mice. J Am Heart Assoc 2014; 3:jah3567. [PMID: 25092786 PMCID: PMC4310358 DOI: 10.1161/jaha.113.000723] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background Abdominal aortic aneurysm (AAA) involves leukocyte recruitment, inflammatory cytokine production, vascular cell apoptosis, neovascularization, and vascular remodeling, all of which contribute to aortic dilatation. Tumor necrosis factor‐like weak inducer of apoptosis (TWEAK) is a cytokine implicated in proinflammatory responses, angiogenesis, and matrix degradation but its role in AAA formation is currently unknown. Methods and Results Experimental AAA with aortic elastase perfusion in mice was induced in wild‐type (WT), TWEAK deficient (TWEAK KO), or Fn14‐deficient (Fn14 KO) mice. TWEAK or Fn14 KO deficiency reduced aortic expansion, lesion macrophages, CD3+ T cells, neutrophils, CD31+ microvessels, CCL2 and CCL5 chemokines expression, and MMP activity after 14 days postperfusion. TWEAK and Fn14 KO mice also showed a reduced loss of medial vascular smooth muscle cells (VSMC) that was related to a reduced number of apoptotic cells in these animals compared with WT mice. Aortas from WT animals present a higher disruption of the elastic layer and MMP activity than those from TWEAK or Fn14 KO mice, indicating a diminished vascular remodeling in KO animals. In vitro experiments unveiled that TWEAK induces CCL5 secretion and MMP‐9 activation in both VSMC and bone marrow‐derived macrophages, and decrease VSMC viability, effects dependent on Fn14. Conclusions TWEAK/Fn14 axis participates in AAA formation by promoting lesion inflammatory cell accumulation, angiogenesis, matrix‐degrading protease expression, and vascular remodeling. Blocking TWEAK/Fn14 interaction could be a new target for the treatment of AAA.
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Affiliation(s)
- Carlos Tarín
- Vascular Research Lab, IIS-Fundación Jiménez Díaz, Madrid, Spain (C.T., V.F.L., C.S., J.M.M., J.E., J.L.M.V., L.M.B.C.)
| | - Valvanera Fernández-Laso
- Vascular Research Lab, IIS-Fundación Jiménez Díaz, Madrid, Spain (C.T., V.F.L., C.S., J.M.M., J.E., J.L.M.V., L.M.B.C.)
| | - Cristina Sastre
- Vascular Research Lab, IIS-Fundación Jiménez Díaz, Madrid, Spain (C.T., V.F.L., C.S., J.M.M., J.E., J.L.M.V., L.M.B.C.)
| | - Julio Madrigal-Matute
- Vascular Research Lab, IIS-Fundación Jiménez Díaz, Madrid, Spain (C.T., V.F.L., C.S., J.M.M., J.E., J.L.M.V., L.M.B.C.)
| | - Mónica Gómez
- Spanish National Cardiovascular Research Center, Madrid, Spain (, C.Z.)
| | - Carlos Zaragoza
- Cardiovascular Joint Research Unit, University Hospital Ramón y Cajal Hospital and University Francisco de Vitoria School of Medicine, Madrid, Spain
| | - Jesús Egido
- Vascular Research Lab, IIS-Fundación Jiménez Díaz, Madrid, Spain (C.T., V.F.L., C.S., J.M.M., J.E., J.L.M.V., L.M.B.C.)
| | | | - Jose L Martín-Ventura
- Vascular Research Lab, IIS-Fundación Jiménez Díaz, Madrid, Spain (C.T., V.F.L., C.S., J.M.M., J.E., J.L.M.V., L.M.B.C.)
| | - Luis M Blanco-Colio
- Vascular Research Lab, IIS-Fundación Jiménez Díaz, Madrid, Spain (C.T., V.F.L., C.S., J.M.M., J.E., J.L.M.V., L.M.B.C.)
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31
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Abstract
The extracellular matrix (ECM) is an essential component of the human body that is responsible for the proper function of various organs. Changes in the ECM have been implicated in the pathogenesis of several cardiovascular conditions including atherosclerosis, restenosis, and heart failure. Matrix components, such as collagens and noncollagenous proteins, influence the function and activity of vascular cells, particularly vascular smooth muscle cells and macrophages. Matrix proteins have been shown to be implicated in the development of atherosclerotic complications, such as plaque rupture, aneurysm formation, and calcification. ECM proteins control ECM remodeling through feedback signaling to matrix metalloproteinases (MMPs), which are the key players of ECM remodeling in both normal and pathological conditions. The production of MMPs is closely related to the development of an inflammatory response and is subjected to significant changes at different stages of atherosclerosis. Indeed, blood levels of circulating MMPs may be useful for the assessment of the inflammatory activity in atherosclerosis and the prediction of cardiovascular risk. The availability of a wide variety of low-molecular MMP inhibitors that can be conjugated with various labels provides a good perspective for specific targeting of MMPs and implementation of imaging techniques to visualize MMP activity in atherosclerotic plaques and, most interestingly, to monitor responses to antiatheroslerosis therapies. Finally, because of the crucial role of ECM in cardiovascular repair, the regenerative potential of ECM could be successfully used in constructing engineered scaffolds and vessels that mimic properties of the natural ECM and consist of the native ECM components or composite biomaterials. These scaffolds possess a great promise in vascular tissue engineering.
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32
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Marelli-Berg FM, Clement M, Mauro C, Caligiuri G. An immunologist's guide to CD31 function in T-cells. J Cell Sci 2013; 126:2343-52. [PMID: 23761922 DOI: 10.1242/jcs.124099] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Although it is expressed by all leukocytes, including T-, B-lymphocytes and dendritic cells, the immunoglobulin-like receptor CD31 is generally regarded by immunologists as a marker of endothelial cell lineage that lacks an established functional role in adaptive immunity. This perception has recently been challenged by studies that reveal a key role for this molecule in the regulation of T-cell homeostasis, effector function and trafficking. The complexity of the biological functions of CD31 results from the integration of its adhesive and signaling functions in both the immune and vascular systems. Signaling by means of CD31 is induced by homophilic engagement during the interactions of immune cells and is mediated by phosphatase recruitment or activation through immunoreceptor tyrosine inhibitory motifs (ITIMs) that are located in its cytoplasmic tail. Loss of CD31 function is associated with excessive immunoreactivity and susceptibility to cytotoxic killing. Here, we discuss recent findings that have brought to light a non-redundant, complex role for this molecule in the regulation of T-cell-mediated immune responses, with large impact on our understanding of immunity in health and disease.
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Affiliation(s)
- Federica M Marelli-Berg
- William Harvey Research Institute, Barts' and The London School of Medicine, Queen Mary, University of London, Charterhouse Square, London EC1M 6BQ, UK.
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Airhart N, Brownstein BH, Cobb JP, Schierding W, Arif B, Ennis TL, Thompson RW, Curci JA. Smooth muscle cells from abdominal aortic aneurysms are unique and can independently and synergistically degrade insoluble elastin. J Vasc Surg 2013; 60:1033-41; discussion 1041-2. [PMID: 24080131 DOI: 10.1016/j.jvs.2013.07.097] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 07/08/2013] [Accepted: 07/17/2013] [Indexed: 01/01/2023]
Abstract
BACKGROUND The purpose of this study was to further elucidate the role of the vascular smooth muscle cells (SMCs) in abdominal aortic aneurysm (AAA) disease. We hypothesized that that AAA SMCs are unique and actively participate in the process of degrading the aortic matrix. METHODS Whole-genome expression profiles of SMCs from AAAs, nondilated abdominal aorta (NAA), and carotid endarterectomy (CEA) were compared. We quantified elastolytic activity by culturing SMCs in [(3)H]elastin-coated plates and measuring solubilized tritium in the media after 7 days. Matrix metalloproteinase (MMP)-2 and MMP-9 production was assessed using real-time polymerase chain reaction, zymography, and Western blotting. RESULTS Each SMC type exhibited a unique gene expression pattern. AAA SMCs had greater elastolytic activity than NAA-SMCs (+68%; P < .001) and CEA-SMCs (+45%; P < .001). Zymography showed an increase of active MMP-2 (62 kD) in media from AAA SMCs. AAA SMCs demonstrated twofold greater expression of MMP-2 messenger (m)RNA (P < .05) and 7.3-fold greater MMP-9 expression (P < .01) than NAA-SMCs. Culture with U937 monocytes caused a synergistic increase of elastolysis by AAA SMCs (41%; P < .001) but not NAA-SMCs or CEA-SMCs (P = .99). Coculture with U937 caused a large increase in MMP-9 mRNA in AAA-SMCs and NAA-SMCs (P < .001). MMP-2 mRNA expression was not affected. Western blots of culture media showed a fourfold increase of MMP-9 (92 kD) protein only in AAA-SMCs/U937 but not in NAA-SMCs/U937 (P < .001) and a large increase in active-MMP2 (62 kD), which was less apparent in NAA-SMCs/U937 media (P < .01). CONCLUSIONS AAA-SMCs have a unique gene expression profile and a proelastolytic phenotype that is augmented by macrophages. This may occur by a failure of post-transcriptional control of MMP-9 synthesis.
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Affiliation(s)
- Nathan Airhart
- Department of Surgery, Washington University School of Medicine, St. Louis, Mo
| | - Bernard H Brownstein
- Department of Radiation Oncology, Washington University School of Medicine, St. Louis, Mo
| | - J Perren Cobb
- Department of Surgery, Washington University School of Medicine, St. Louis, Mo
| | | | - Batool Arif
- Department of Surgery, Washington University School of Medicine, St. Louis, Mo
| | - Terri L Ennis
- Department of Surgery, Washington University School of Medicine, St. Louis, Mo
| | - Robert W Thompson
- Department of Surgery, Washington University School of Medicine, St. Louis, Mo; Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Mo
| | - John A Curci
- Department of Surgery, Washington University School of Medicine, St. Louis, Mo.
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Ait-Oufella H, Wang Y, Herbin O, Bourcier S, Potteaux S, Joffre J, Loyer X, Ponnuswamy P, Esposito B, Dalloz M, Laurans L, Tedgui A, Mallat Z. Natural regulatory T cells limit angiotensin II-induced aneurysm formation and rupture in mice. Arterioscler Thromb Vasc Biol 2013; 33:2374-9. [PMID: 23908246 DOI: 10.1161/atvbaha.113.301280] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
OBJECTIVE Abdominal aortic aneurysm is an inflammatory disease leading to destructive vascular remodeling and ultimately to lethal aortic rupture. Despite its frequent association with atherosclerosis, compelling studies have shown striking differences and potentially opposite roles of T-cell helper responses in aneurysm as compared with atherosclerosis, casting doubt on the relevance and suitability of T-cell-targeted therapies in this context. APPROACH AND RESULTS Here, we show that selective depletion of T regulatory (Treg) cells using a CD25-specific monoclonal antibody significantly enhances the susceptibility of C57Bl/6 mice to angiotensin II-induced abdominal aortic aneurysm and promotes aortic rupture (n=25-44 mice/group). Similar results are observed in angiotensin II-treated Cd80(-/-)/Cd86(-/-) or Cd28(-/-) mice with impaired Treg cell homeostasis (n=18-23 mice/group). Treg cell depletion is associated with increased immune cell activation and a blunted interleukin (IL)-10 anti-inflammatory response, suggesting an immunoinflammatory imbalance. Interestingly, Il-10(-/-) mice (n=20 mice/group) show increased susceptibility to angiotensin II-induced abdominal aortic aneurysm and aortic rupture and are insensitive to Treg cell depletion. Finally, reconstitution of Cd28(-/-) Treg-deficient mice with Treg cells (n=22 mice/group) restores a balance in the immunoinflammatory response, rescues the animals from increased susceptibility to aneurysm, and prevents aortic dissection. CONCLUSIONS These results identify a critical role for Treg cells and IL-10 in the control of aneurysm formation and its progression to rupture and suggest that therapies targeting Treg responses may be most suited to treat aneurysmal disease.
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Affiliation(s)
- Hafid Ait-Oufella
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, Paris, France (H.A.-O., Y.W., O.H., S.B., S.P., J.J., X.L., P.P., B.E., M.D., L.L., A.T., Z.M.); Service de Réanimation Médicale, Hôpital Saint-Antoine, Université Pierre-et-Marie Curie, Paris, France (H.A.-O.); and Division of Cardiovascular Medicine, Department of Medicine, Addenbrooke's Hospital, University of Cambridge, Cambridge, United Kingdom (Z.M.)
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Eagleton MJ. Inflammation in abdominal aortic aneurysms: cellular infiltrate and cytokine profiles. Vascular 2012; 20:278-83. [DOI: 10.1258/vasc.2011.201207] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Abdominal aortic aneurysm (AAA) pathogenesis occurs as a result of the altered homeostasis of the aortic vessel wall structural proteins. This results in weakening, and subsequent expansion, of the aorta leading to aneurysm formation. Multiple mechanisms are involved in this process, including genetic abnormalities, biomechanical wall stress, apoptosis, and proteolytic degradation of the aortic wall. One key hallmark of this pathology, which orchestrates the interaction of the various pathologic processes, is inflammation. The inflammatory process is characterized by the infiltration of a variety of cells, which leads to the upregulation of multiple cytokines. The balance of the cellular type and resultant cytokine milieu determines the ultimate fate of the aortic wall – healing, atherosclerosis or aneurysm formation. This review highlights some of the known cellular and cytokine inflammatory events that are involved in aortic aneurysm formation.
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Affiliation(s)
- Matthew J Eagleton
- Department of Vascular Surgery, Cleveland Clinic, Lerner College of Medicine-CWRU, Cleveland, OH 44195, USA
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Plasma profiling by a protein array approach identifies IGFBP-1 as a novel biomarker of abdominal aortic aneurysm. Atherosclerosis 2012; 221:544-50. [DOI: 10.1016/j.atherosclerosis.2012.01.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Revised: 01/04/2012] [Accepted: 01/04/2012] [Indexed: 01/05/2023]
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Ramos-Mozo P, Madrigal-Matute J, Vega de Ceniga M, Blanco-Colio LM, Meilhac O, Feldman L, Michel JB, Clancy P, Golledge J, Norman PE, Egido J, Martin-Ventura JL. Increased plasma levels of NGAL, a marker of neutrophil activation, in patients with abdominal aortic aneurysm. Atherosclerosis 2012; 220:552-6. [DOI: 10.1016/j.atherosclerosis.2011.11.023] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Revised: 10/26/2011] [Accepted: 11/16/2011] [Indexed: 10/15/2022]
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Fornasa G, Clement M, Groyer E, Gaston AT, Khallou-Laschet J, Morvan M, Guedj K, Kaveri SV, Tedgui A, Michel JB, Nicoletti A, Caligiuri G. A CD31-derived peptide prevents angiotensin II-induced atherosclerosis progression and aneurysm formation. Cardiovasc Res 2012; 94:30-7. [PMID: 22293851 DOI: 10.1093/cvr/cvs076] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
AIMS The loss of the inhibitory receptor CD31 on peripheral T lymphocytes is associated with the incidence of atherosclerotic complications such as abdominal aortic aneurysms (AAA) in patients and plaque thrombosis in mice. However, we have recently discovered that a small fragment of extracellular CD31 remains expressed on the surface of the apparently 'CD31-negative' T-cells and that it is possible to restore the CD31-mediated T-cell inhibition in vivo by using a synthetic CD31-derived peptide. Here, we wanted to evaluate the therapeutic potential of the peptide in an experimental model of accelerated atherosclerosis and AAA formation. METHODS AND RESULTS The effect of the murine CD31-derived peptide (aa 551-574, 1.5 mg/kg/day, sc) was evaluated on the extent of atherosclerotic plaques and the incidence of AAA in 28-week-old apolipoprotein E knockout mice (male, n ≥ 8/group) submitted to chronic angiotensin II infusion. The therapeutic mechanisms of the peptide were assessed by evaluating its effect on immune cell functions in vivo and in vitro. The prevalence of angiotensin II-induced AAA correlated with the loss of extracellular CD31 on T-cells. CD31 peptide treatment reduced both aneurysm formation and plaque size (P < 0.05 vs. control). Protection was associated with reduced perivascular leucocyte infiltration and T-cell activation in vivo. Functional in vitro studies showed that the peptide is able to suppress both T-cell and macrophage activation. CONCLUSION CD31 peptides could represent a new class of drugs intended to prevent the inflammatory cell processes, such as those underlying progression of atherosclerosis and development of AAA.
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Affiliation(s)
- Giulia Fornasa
- INSERM, UMRS 698, 46 rue Henri Huchard, F-75018 Paris, France
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Ramos-Mozo P, Madrigal-Matute J, Martinez-Pinna R, Blanco-Colio LM, Lopez JA, Camafeita E, Meilhac O, Michel JB, Aparicio C, de Ceniga MV, Egido J, Martín-Ventura JL. Proteomic Analysis of Polymorphonuclear Neutrophils Identifies Catalase as a Novel Biomarker of Abdominal Aortic Aneurysm: Potential Implication of Oxidative Stress in Abdominal Aortic Aneurysm Progression. Arterioscler Thromb Vasc Biol 2011; 31:3011-9. [DOI: 10.1161/atvbaha.111.237537] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective—
Polymorphonuclear neutrophils (PMNs) play a main role in abdominal aortic aneurysm (AAA) progression. We have analyzed circulating PMNs isolated from AAA patients and controls by a proteomic approach to identify proteins potentially involved in AAA pathogenesis.
Methods and Results—
PMNs from 8 AAA patients (4 large AAA >5 cm and 4 small AAA 3–5 cm) and 4 controls were analyzed by 2D differential in-gel electrophoresis. Among differentially expressed spots, several proteins involved in redox balance were identified by mass spectrometry (eg, cyclophilin, thioredoxin reductase, catalase). Diminished catalase expression and activity were observed in PMNs from AAA patients compared with controls. In contrast, PMNs from AAA patients displayed higher H
2
O
2
and myeloperoxidase levels than PMNs from controls. Moreover, a significant decrease in catalase mRNA levels was observed in PMNs after phorbol 12-myristate 13-acetate incubation. Catalase plasma levels were also decreased in large (n=47) and small (n=56) AAA patients compared with controls (n=34). We observed catalase expression in AAA thrombus and thrombus-conditioned medium, associated with PMN infiltration. Furthermore, increased H
2
O
2
levels were observed in AAA thrombus-conditioned medium compared with the media layer.
Conclusion—
Diminished catalase levels in circulating PMNs and plasma are observed in AAA patients, supporting an important role of oxidative stress in AAA evolution.
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Affiliation(s)
- Priscila Ramos-Mozo
- From the Vascular Research Laboratory (P.R.-M., J.M.-M., R.M.-P., L.M.B.-C., J.E., J.L.M.-V.) and Vascular Surgery (C.A.), Instituto de Investigaciones Sanitarias, Fundación Jiménez Diaz, Autonoma University, Madrid, Spain; Unidad de Proteomica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E.C.); Institut National de la Santé et de la Recherche Médicale, U698, Univ Paris 7, College Hospital Universitary, X-Bichat, Paris, France (O.M., J.-B.M.); Galdakao Hospital,
| | - Julio Madrigal-Matute
- From the Vascular Research Laboratory (P.R.-M., J.M.-M., R.M.-P., L.M.B.-C., J.E., J.L.M.-V.) and Vascular Surgery (C.A.), Instituto de Investigaciones Sanitarias, Fundación Jiménez Diaz, Autonoma University, Madrid, Spain; Unidad de Proteomica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E.C.); Institut National de la Santé et de la Recherche Médicale, U698, Univ Paris 7, College Hospital Universitary, X-Bichat, Paris, France (O.M., J.-B.M.); Galdakao Hospital,
| | - Roxana Martinez-Pinna
- From the Vascular Research Laboratory (P.R.-M., J.M.-M., R.M.-P., L.M.B.-C., J.E., J.L.M.-V.) and Vascular Surgery (C.A.), Instituto de Investigaciones Sanitarias, Fundación Jiménez Diaz, Autonoma University, Madrid, Spain; Unidad de Proteomica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E.C.); Institut National de la Santé et de la Recherche Médicale, U698, Univ Paris 7, College Hospital Universitary, X-Bichat, Paris, France (O.M., J.-B.M.); Galdakao Hospital,
| | - Luis Miguel Blanco-Colio
- From the Vascular Research Laboratory (P.R.-M., J.M.-M., R.M.-P., L.M.B.-C., J.E., J.L.M.-V.) and Vascular Surgery (C.A.), Instituto de Investigaciones Sanitarias, Fundación Jiménez Diaz, Autonoma University, Madrid, Spain; Unidad de Proteomica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E.C.); Institut National de la Santé et de la Recherche Médicale, U698, Univ Paris 7, College Hospital Universitary, X-Bichat, Paris, France (O.M., J.-B.M.); Galdakao Hospital,
| | - Juan Antonio Lopez
- From the Vascular Research Laboratory (P.R.-M., J.M.-M., R.M.-P., L.M.B.-C., J.E., J.L.M.-V.) and Vascular Surgery (C.A.), Instituto de Investigaciones Sanitarias, Fundación Jiménez Diaz, Autonoma University, Madrid, Spain; Unidad de Proteomica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E.C.); Institut National de la Santé et de la Recherche Médicale, U698, Univ Paris 7, College Hospital Universitary, X-Bichat, Paris, France (O.M., J.-B.M.); Galdakao Hospital,
| | - Emilio Camafeita
- From the Vascular Research Laboratory (P.R.-M., J.M.-M., R.M.-P., L.M.B.-C., J.E., J.L.M.-V.) and Vascular Surgery (C.A.), Instituto de Investigaciones Sanitarias, Fundación Jiménez Diaz, Autonoma University, Madrid, Spain; Unidad de Proteomica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E.C.); Institut National de la Santé et de la Recherche Médicale, U698, Univ Paris 7, College Hospital Universitary, X-Bichat, Paris, France (O.M., J.-B.M.); Galdakao Hospital,
| | - Olivier Meilhac
- From the Vascular Research Laboratory (P.R.-M., J.M.-M., R.M.-P., L.M.B.-C., J.E., J.L.M.-V.) and Vascular Surgery (C.A.), Instituto de Investigaciones Sanitarias, Fundación Jiménez Diaz, Autonoma University, Madrid, Spain; Unidad de Proteomica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E.C.); Institut National de la Santé et de la Recherche Médicale, U698, Univ Paris 7, College Hospital Universitary, X-Bichat, Paris, France (O.M., J.-B.M.); Galdakao Hospital,
| | - Jean-Baptiste Michel
- From the Vascular Research Laboratory (P.R.-M., J.M.-M., R.M.-P., L.M.B.-C., J.E., J.L.M.-V.) and Vascular Surgery (C.A.), Instituto de Investigaciones Sanitarias, Fundación Jiménez Diaz, Autonoma University, Madrid, Spain; Unidad de Proteomica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E.C.); Institut National de la Santé et de la Recherche Médicale, U698, Univ Paris 7, College Hospital Universitary, X-Bichat, Paris, France (O.M., J.-B.M.); Galdakao Hospital,
| | - Cesar Aparicio
- From the Vascular Research Laboratory (P.R.-M., J.M.-M., R.M.-P., L.M.B.-C., J.E., J.L.M.-V.) and Vascular Surgery (C.A.), Instituto de Investigaciones Sanitarias, Fundación Jiménez Diaz, Autonoma University, Madrid, Spain; Unidad de Proteomica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E.C.); Institut National de la Santé et de la Recherche Médicale, U698, Univ Paris 7, College Hospital Universitary, X-Bichat, Paris, France (O.M., J.-B.M.); Galdakao Hospital,
| | - Melina Vega de Ceniga
- From the Vascular Research Laboratory (P.R.-M., J.M.-M., R.M.-P., L.M.B.-C., J.E., J.L.M.-V.) and Vascular Surgery (C.A.), Instituto de Investigaciones Sanitarias, Fundación Jiménez Diaz, Autonoma University, Madrid, Spain; Unidad de Proteomica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E.C.); Institut National de la Santé et de la Recherche Médicale, U698, Univ Paris 7, College Hospital Universitary, X-Bichat, Paris, France (O.M., J.-B.M.); Galdakao Hospital,
| | - Jesus Egido
- From the Vascular Research Laboratory (P.R.-M., J.M.-M., R.M.-P., L.M.B.-C., J.E., J.L.M.-V.) and Vascular Surgery (C.A.), Instituto de Investigaciones Sanitarias, Fundación Jiménez Diaz, Autonoma University, Madrid, Spain; Unidad de Proteomica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E.C.); Institut National de la Santé et de la Recherche Médicale, U698, Univ Paris 7, College Hospital Universitary, X-Bichat, Paris, France (O.M., J.-B.M.); Galdakao Hospital,
| | - José Luis Martín-Ventura
- From the Vascular Research Laboratory (P.R.-M., J.M.-M., R.M.-P., L.M.B.-C., J.E., J.L.M.-V.) and Vascular Surgery (C.A.), Instituto de Investigaciones Sanitarias, Fundación Jiménez Diaz, Autonoma University, Madrid, Spain; Unidad de Proteomica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E.C.); Institut National de la Santé et de la Recherche Médicale, U698, Univ Paris 7, College Hospital Universitary, X-Bichat, Paris, France (O.M., J.-B.M.); Galdakao Hospital,
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Weil BR, Kushner EJ, Diehl KJ, Greiner JJ, Stauffer BL, Desouza CA. CD31+ T cells, endothelial function and cardiovascular risk. Heart Lung Circ 2011; 20:659-62. [PMID: 21767986 DOI: 10.1016/j.hlc.2011.06.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Revised: 06/17/2011] [Accepted: 06/19/2011] [Indexed: 11/25/2022]
Abstract
Deficits in endothelial cell repair mechanisms are thought to contribute to the aetiology of endothelial dysfunction and, subsequently, cardiovascular disease (CVD). CD31(+) T cells or so-called "angiogenic T cells" are a newly defined T cell subset that exhibit favourable vascular qualities and show a strong negative relation with atherosclerotic disease severity. Despite growing evidence that CD31(+) T cells are important for vascular homeostasis, it is currently unknown if CD31(+) T cell number and function are related to endothelial function and CVD risk in healthy adults. To address this question, we studied 24 healthy adult men (ages: 21-70). Endothelial function was assessed by the forearm blood flow (FBF) response to intra-arterial infusion of acetylcholine (ACh) and CVD risk was estimated by Framingham Risk Score (FRS). CD31(+) T cell number was determined by fluorescence-activated cell sorting. Magnetic-activated cell sorting was used to isolate CD31(+) T cells for Boyden chamber migration. No relation was observed between CD31(+) T cell number and FBF response to ACh or FRS. However, CD31(+) T cell migration to stromal cell-derived factor (SDF)-1α and vascular endothelial growth factor (VEGF) was positively correlated with FBF response to ACh (r = 0.43 for SDF-1α; r = 0.38 for VEGF; both P<0.05) and inversely related to FRS (r = -0.53 for SDF-1α; r = -0.48 for VEGF; both P<0.05). These findings demonstrate that CD31(+) T cell function, but not number, is associated with in vivo endothelial function and CVD risk in healthy adult men.
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Affiliation(s)
- Brian R Weil
- Integrative Vascular Biology Laboratory, Department of Integrative Physiology, University of Colorado, Boulder, CO 80309, USA
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Martinez-Pinna R, Ramos-Mozo P, Madrigal-Matute J, Blanco-Colio LM, Lopez JA, Calvo E, Camafeita E, Lindholt JS, Meilhac O, Delbosc S, Michel JB, de Ceniga MV, Egido J, Martin-Ventura JL. Identification of Peroxiredoxin-1 as a Novel Biomarker of Abdominal Aortic Aneurysm. Arterioscler Thromb Vasc Biol 2011; 31:935-43. [DOI: 10.1161/atvbaha.110.214429] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Roxana Martinez-Pinna
- From the Vascular Research Laboratory, Instituto de Investigación Sanitaria-Fundación Jiménez Diaz-Autonoma University, Madrid, Spain (R.M.-P., P.R.-M., J.M.-M., L.M.B.-C., J.E., J.L.M.-V.); Unidad de Proteómica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E. Calvo, E. Camafeita); Vascular Research Unit, Viborg Hospital, Viborg, Denmark (J.S.L.); Institut National de la Santé et de la Recherche Médicale U698, Paris, France (O.M., S.D., J.-B.M.); Université Denis
| | - Priscila Ramos-Mozo
- From the Vascular Research Laboratory, Instituto de Investigación Sanitaria-Fundación Jiménez Diaz-Autonoma University, Madrid, Spain (R.M.-P., P.R.-M., J.M.-M., L.M.B.-C., J.E., J.L.M.-V.); Unidad de Proteómica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E. Calvo, E. Camafeita); Vascular Research Unit, Viborg Hospital, Viborg, Denmark (J.S.L.); Institut National de la Santé et de la Recherche Médicale U698, Paris, France (O.M., S.D., J.-B.M.); Université Denis
| | - Julio Madrigal-Matute
- From the Vascular Research Laboratory, Instituto de Investigación Sanitaria-Fundación Jiménez Diaz-Autonoma University, Madrid, Spain (R.M.-P., P.R.-M., J.M.-M., L.M.B.-C., J.E., J.L.M.-V.); Unidad de Proteómica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E. Calvo, E. Camafeita); Vascular Research Unit, Viborg Hospital, Viborg, Denmark (J.S.L.); Institut National de la Santé et de la Recherche Médicale U698, Paris, France (O.M., S.D., J.-B.M.); Université Denis
| | - Luis M. Blanco-Colio
- From the Vascular Research Laboratory, Instituto de Investigación Sanitaria-Fundación Jiménez Diaz-Autonoma University, Madrid, Spain (R.M.-P., P.R.-M., J.M.-M., L.M.B.-C., J.E., J.L.M.-V.); Unidad de Proteómica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E. Calvo, E. Camafeita); Vascular Research Unit, Viborg Hospital, Viborg, Denmark (J.S.L.); Institut National de la Santé et de la Recherche Médicale U698, Paris, France (O.M., S.D., J.-B.M.); Université Denis
| | - Juan A. Lopez
- From the Vascular Research Laboratory, Instituto de Investigación Sanitaria-Fundación Jiménez Diaz-Autonoma University, Madrid, Spain (R.M.-P., P.R.-M., J.M.-M., L.M.B.-C., J.E., J.L.M.-V.); Unidad de Proteómica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E. Calvo, E. Camafeita); Vascular Research Unit, Viborg Hospital, Viborg, Denmark (J.S.L.); Institut National de la Santé et de la Recherche Médicale U698, Paris, France (O.M., S.D., J.-B.M.); Université Denis
| | - Enrique Calvo
- From the Vascular Research Laboratory, Instituto de Investigación Sanitaria-Fundación Jiménez Diaz-Autonoma University, Madrid, Spain (R.M.-P., P.R.-M., J.M.-M., L.M.B.-C., J.E., J.L.M.-V.); Unidad de Proteómica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E. Calvo, E. Camafeita); Vascular Research Unit, Viborg Hospital, Viborg, Denmark (J.S.L.); Institut National de la Santé et de la Recherche Médicale U698, Paris, France (O.M., S.D., J.-B.M.); Université Denis
| | - Emilio Camafeita
- From the Vascular Research Laboratory, Instituto de Investigación Sanitaria-Fundación Jiménez Diaz-Autonoma University, Madrid, Spain (R.M.-P., P.R.-M., J.M.-M., L.M.B.-C., J.E., J.L.M.-V.); Unidad de Proteómica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E. Calvo, E. Camafeita); Vascular Research Unit, Viborg Hospital, Viborg, Denmark (J.S.L.); Institut National de la Santé et de la Recherche Médicale U698, Paris, France (O.M., S.D., J.-B.M.); Université Denis
| | - Jes S. Lindholt
- From the Vascular Research Laboratory, Instituto de Investigación Sanitaria-Fundación Jiménez Diaz-Autonoma University, Madrid, Spain (R.M.-P., P.R.-M., J.M.-M., L.M.B.-C., J.E., J.L.M.-V.); Unidad de Proteómica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E. Calvo, E. Camafeita); Vascular Research Unit, Viborg Hospital, Viborg, Denmark (J.S.L.); Institut National de la Santé et de la Recherche Médicale U698, Paris, France (O.M., S.D., J.-B.M.); Université Denis
| | - Olivier Meilhac
- From the Vascular Research Laboratory, Instituto de Investigación Sanitaria-Fundación Jiménez Diaz-Autonoma University, Madrid, Spain (R.M.-P., P.R.-M., J.M.-M., L.M.B.-C., J.E., J.L.M.-V.); Unidad de Proteómica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E. Calvo, E. Camafeita); Vascular Research Unit, Viborg Hospital, Viborg, Denmark (J.S.L.); Institut National de la Santé et de la Recherche Médicale U698, Paris, France (O.M., S.D., J.-B.M.); Université Denis
| | - Sandrine Delbosc
- From the Vascular Research Laboratory, Instituto de Investigación Sanitaria-Fundación Jiménez Diaz-Autonoma University, Madrid, Spain (R.M.-P., P.R.-M., J.M.-M., L.M.B.-C., J.E., J.L.M.-V.); Unidad de Proteómica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E. Calvo, E. Camafeita); Vascular Research Unit, Viborg Hospital, Viborg, Denmark (J.S.L.); Institut National de la Santé et de la Recherche Médicale U698, Paris, France (O.M., S.D., J.-B.M.); Université Denis
| | - Jean-Baptiste Michel
- From the Vascular Research Laboratory, Instituto de Investigación Sanitaria-Fundación Jiménez Diaz-Autonoma University, Madrid, Spain (R.M.-P., P.R.-M., J.M.-M., L.M.B.-C., J.E., J.L.M.-V.); Unidad de Proteómica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E. Calvo, E. Camafeita); Vascular Research Unit, Viborg Hospital, Viborg, Denmark (J.S.L.); Institut National de la Santé et de la Recherche Médicale U698, Paris, France (O.M., S.D., J.-B.M.); Université Denis
| | - Melina Vega de Ceniga
- From the Vascular Research Laboratory, Instituto de Investigación Sanitaria-Fundación Jiménez Diaz-Autonoma University, Madrid, Spain (R.M.-P., P.R.-M., J.M.-M., L.M.B.-C., J.E., J.L.M.-V.); Unidad de Proteómica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E. Calvo, E. Camafeita); Vascular Research Unit, Viborg Hospital, Viborg, Denmark (J.S.L.); Institut National de la Santé et de la Recherche Médicale U698, Paris, France (O.M., S.D., J.-B.M.); Université Denis
| | - Jesus Egido
- From the Vascular Research Laboratory, Instituto de Investigación Sanitaria-Fundación Jiménez Diaz-Autonoma University, Madrid, Spain (R.M.-P., P.R.-M., J.M.-M., L.M.B.-C., J.E., J.L.M.-V.); Unidad de Proteómica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E. Calvo, E. Camafeita); Vascular Research Unit, Viborg Hospital, Viborg, Denmark (J.S.L.); Institut National de la Santé et de la Recherche Médicale U698, Paris, France (O.M., S.D., J.-B.M.); Université Denis
| | - Jose L. Martin-Ventura
- From the Vascular Research Laboratory, Instituto de Investigación Sanitaria-Fundación Jiménez Diaz-Autonoma University, Madrid, Spain (R.M.-P., P.R.-M., J.M.-M., L.M.B.-C., J.E., J.L.M.-V.); Unidad de Proteómica, Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.A.L., E. Calvo, E. Camafeita); Vascular Research Unit, Viborg Hospital, Viborg, Denmark (J.S.L.); Institut National de la Santé et de la Recherche Médicale U698, Paris, France (O.M., S.D., J.-B.M.); Université Denis
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Ciborowski M, Martin-Ventura JL, Meilhac O, Michel JB, Ruperez FJ, Tuñon J, Egido J, Barbas C. Metabolites Secreted by Human Atherothrombotic Aneurysms Revealed through a Metabolomic Approach. J Proteome Res 2011; 10:1374-82. [DOI: 10.1021/pr101138m] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michal Ciborowski
- Centro de Excelencia en Metabolómica y Bioanálisis (CEMBIO), Faculty of Pharmacy, University San Pablo-CEU, Campus Montepríncipe, Boadilla del Monte, 28668 Madrid, Spain
- Department of Physical Chemistry, Medical University of Bialystok, Kilinskiego 1, 15-089 Bialystok, Poland
| | - Jose L. Martin-Ventura
- IIS-Vascular Research Laboratory, Fundación Jiménez Díaz, Madrid, Spain
- Autónoma University, Madrid, Spain
| | - Olivier Meilhac
- INSERM U698, Paris, F-75018, France; Université Denis Diderot, UMR-S698, Paris, F-75018, France
| | - Jean-Baptiste Michel
- INSERM U698, Paris, F-75018, France; Université Denis Diderot, UMR-S698, Paris, F-75018, France
| | - F. Javier Ruperez
- Centro de Excelencia en Metabolómica y Bioanálisis (CEMBIO), Faculty of Pharmacy, University San Pablo-CEU, Campus Montepríncipe, Boadilla del Monte, 28668 Madrid, Spain
| | - Jose Tuñon
- IIS-Vascular Research Laboratory, Fundación Jiménez Díaz, Madrid, Spain
- Autónoma University, Madrid, Spain
| | - Jesus Egido
- IIS-Vascular Research Laboratory, Fundación Jiménez Díaz, Madrid, Spain
- Autónoma University, Madrid, Spain
| | - Coral Barbas
- Centro de Excelencia en Metabolómica y Bioanálisis (CEMBIO), Faculty of Pharmacy, University San Pablo-CEU, Campus Montepríncipe, Boadilla del Monte, 28668 Madrid, Spain
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44
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Kushner EJ, Weil BR, MacEneaney OJ, Morgan RG, Mestek ML, Van Guilder GP, Diehl KJ, Stauffer BL, DeSouza CA. Human aging and CD31+ T-cell number, migration, apoptotic susceptibility, and telomere length. J Appl Physiol (1985) 2010; 109:1756-61. [PMID: 20864561 DOI: 10.1152/japplphysiol.00601.2010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
CD31(+) T cells, or so-called "angiogenic T cells," have been shown to demonstrate vasculoprotective and neovasculogenic qualities. The influence of age on CD31(+) T-cell number and function is unclear. We tested the hypothesis that circulating CD31(+) T-cell number and migratory capacity are reduced, apoptotic susceptibility is heightened, and telomere length is shortened with advancing age in adult humans. Thirty-six healthy, sedentary men were studied: 12 young (25 ± 1 yr), 12 middle aged (46 ± 1 yr), and 12 older (64 ± 2 yr). CD31(+) T cells were isolated from peripheral blood samples by magnetic-activated cell sorting. The number of circulating CD31(+) T cells (fluorescence-activated cell sorting analysis) was lower (P < 0.01) in older (24% of CD3(+) cells) compared with middle-aged (38% of CD3(+) cells) and young (40% of CD3(+) cells) men. Migration (Boyden chamber) to both VEGF and stromal cell-derived factor-1α was markedly blunted (P < 0.05) in cells harvested from middle-aged [306.1 ± 45 and 305.6 ± 46 arbitrary units (AU), respectively] and older (231 ± 65 and 235 ± 62 AU, respectively) compared with young (525 ± 60 and 570 ± 62 AU, respectively) men. CD31(+) T cells from middle-aged and older men demonstrated greater apoptotic susceptibility, as staurosporine-stimulated intracellular caspase-3 activation was ∼ 40% higher (P < 0.05) than young. There was a progressive age-related decline in CD31(+) T-cell telomere length (young: 10,706 ± 220 bp; middle-aged: 10,179 ± 251 bp; and older: 9,324 ± 192 bp). Numerical and functional impairments in this unique T-cell subpopulation may contribute to diminished angiogenic potential and greater cardiovascular risk with advancing age.
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Affiliation(s)
- Erich J Kushner
- Integrative Vascular Biology Laboratory, Department of Integrative Physiology, University of Colorado, Boulder, CO 8030, USA
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45
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Caligiuri G, Nicoletti A. Tregs and human atherothrombotic diseases: toward a clinical application? Arterioscler Thromb Vasc Biol 2010; 30:1679-81. [PMID: 20720192 DOI: 10.1161/atvbaha.110.209668] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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46
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Yin M, Zhang J, Wang Y, Wang S, Böckler D, Duan Z, Xin S. Deficient CD4
+
CD25
+
T Regulatory Cell Function in Patients With Abdominal Aortic Aneurysms. Arterioscler Thromb Vasc Biol 2010; 30:1825-31. [PMID: 20448211 DOI: 10.1161/atvbaha.109.200303] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Objective—
Increasing evidence shows that autoimmune response contributes importantly to pathogenesis of abdominal aortic aneurysm (AAA). This work was aimed to assess the possibly altered function of peripheral CD4
+
CD25
+
T regulatory cells (Tregs) that might breakdown immunologic self-tolerance in AAA patients.
Methods and Results—
Peripheral blood from 22 AAA patients, 11 patients with abdominal aortic atherosclerotic occlusive disease (AOD), and 32 healthy controls (HCs) was analyzed to determine the percentage of CD4
+
CD25
+
Tregs in the total CD4
+
T-cell population and FOXP3 expression by means of flow cytometry. The frequencies of the CD4
+
CD25
+
Treg population were not significantly different between groups (AAA, 5.69±0.99%; AOD, 5.52±1.13%; HC, 5.88±1.55%;
P
>0.05). However, the frequency of CD4
+
CD25
+
FOXP3
+
T cells in AAA patients (2.45±0.57%) was significantly lower than that in AOD group (3.41±0.72%;
P
<0.01) or in HCs (3.69±0.82%;
P
<0.01). A comparison of FOXP3 mRNA and protein expression revealed significantly lower levels in CD4
+
CD25
+
Tregs from AAA group than either of other 2 groups (
P
<0.01). Suppressive function assay showed that freshly isolated CD4
+
CD25
+
Tregs from patients with AAA exhibited significantly less suppressive activity than those from AOD patients or HCs (
P
<0.01). Mixing cultures with CD4
+
CD25
+
T cells and CD4
+
CD25
−
T cells from AAA patients and HCs demonstrated that the primary regulatory defect is due to a dysfunction of CD4
+
CD25
+
Tregs, and not a resistance of CD4
+
CD25
−
responder T cells to suppression in AAA patients.
Conclusion—
Our data demonstrate a reduced level of FOXP3 expression in peripheral CD4
+
CD25
+
Tregs and decreased frequency of CD4
+
CD25
+
FOXP3
+
T cells in a cohort of AAA patients enrolled in the study, which leads to a functional deficiency of CD4
+
CD25
+
Tregs as a whole. This indicates an impaired immunoregulation by Tregs that may contribute to AAA pathogenesis.
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Affiliation(s)
- Mingdi Yin
- From Department of Vascular Surgery, First Hospital, China Medical University, Shenyang, China (M.Y., J.Z., Y.W., S.W., Z.D., S.X.), and Department of Vascular and Endovascular Surgery, University of Heidelberg, Heidelberg, Germany (D.B.)
| | - Jian Zhang
- From Department of Vascular Surgery, First Hospital, China Medical University, Shenyang, China (M.Y., J.Z., Y.W., S.W., Z.D., S.X.), and Department of Vascular and Endovascular Surgery, University of Heidelberg, Heidelberg, Germany (D.B.)
| | - Yong Wang
- From Department of Vascular Surgery, First Hospital, China Medical University, Shenyang, China (M.Y., J.Z., Y.W., S.W., Z.D., S.X.), and Department of Vascular and Endovascular Surgery, University of Heidelberg, Heidelberg, Germany (D.B.)
| | - Shaoye Wang
- From Department of Vascular Surgery, First Hospital, China Medical University, Shenyang, China (M.Y., J.Z., Y.W., S.W., Z.D., S.X.), and Department of Vascular and Endovascular Surgery, University of Heidelberg, Heidelberg, Germany (D.B.)
| | - Dittmar Böckler
- From Department of Vascular Surgery, First Hospital, China Medical University, Shenyang, China (M.Y., J.Z., Y.W., S.W., Z.D., S.X.), and Department of Vascular and Endovascular Surgery, University of Heidelberg, Heidelberg, Germany (D.B.)
| | - Zhiquan Duan
- From Department of Vascular Surgery, First Hospital, China Medical University, Shenyang, China (M.Y., J.Z., Y.W., S.W., Z.D., S.X.), and Department of Vascular and Endovascular Surgery, University of Heidelberg, Heidelberg, Germany (D.B.)
| | - Shijie Xin
- From Department of Vascular Surgery, First Hospital, China Medical University, Shenyang, China (M.Y., J.Z., Y.W., S.W., Z.D., S.X.), and Department of Vascular and Endovascular Surgery, University of Heidelberg, Heidelberg, Germany (D.B.)
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47
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Selection of an Immunohistochemical Panel for Cardiovascular Research in Sheep. Appl Immunohistochem Mol Morphol 2010; 18:382-91. [DOI: 10.1097/pai.0b013e3181cd32e7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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48
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Martinez-Pinna R, Lindholt JS, Blanco-Colio LM, Dejouvencel T, Madrigal-Matute J, Ramos-Mozo P, Vega de Ceniga M, Michel JB, Egido J, Meilhac O, Martin-Ventura JL. Increased levels of thioredoxin in patients with abdominal aortic aneurysms (AAAs). A potential link of oxidative stress with AAA evolution. Atherosclerosis 2010; 212:333-8. [PMID: 20609439 DOI: 10.1016/j.atherosclerosis.2010.05.031] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2010] [Revised: 05/11/2010] [Accepted: 05/19/2010] [Indexed: 11/19/2022]
Abstract
OBJECTIVE Oxidative stress is a main mechanism involved in vascular pathologies. Increased thioredoxin (TRX) levels have been observed in several oxidative stress-associated cardiovascular diseases. We aim to test the potential role of TRX as a biomarker of oxidative stress in abdominal aortic aneurysm (AAA). METHODS TRX levels were analysed in both AAA intraluminal thrombus (ILT) tissue and in tissue-conditioned media by immunohistochemistry, Western blot and ELISA. Moreover, serum TRX levels were assessed in AAA Caucasian patients by ELISA. RESULTS TRX was mainly localized in the luminal part of ILT in AAA. Compared with the abluminal layer, TRX release was increased in the luminal layer of the ILT of AAA (31+/-9 ng/ml vs. 9+/-3 ng/ml, p<0.05). The interest of this approach is that we can identify proteins potentially released into the blood compartment, which could serve as biomarkers of the pathology. In a training population, serum TRX levels were significantly increased in patients with AAA relative to healthy subjects (50+/-6 ng/ml vs. 26+/-3 ng/ml, p<0.05). These results were validated in a second independent group of patients. Moreover, a positive correlation between TRX and AAA size (rho=0.5, p<0.001) was observed. Finally, in AAA samples with follow-up, TRX was positively associated to aneurismal growth rate (rho=0.25, p=0.027). CONCLUSIONS TRX release is increased in the luminal part of AAA and TRX serum levels are increased in AAA patients compared with healthy subjects. TRX levels correlates with AAA size and expansion, suggesting its potential role as a biomarker of AAA evolution.
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Affiliation(s)
- R Martinez-Pinna
- IIS-Vascular Research Lab, Fundación Jiménez Diaz, Madrid, Spain
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49
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Fornasa G, Groyer E, Clement M, Dimitrov J, Compain C, Gaston AT, Varthaman A, Khallou-Laschet J, Newman DK, Graff-Dubois S, Nicoletti A, Caligiuri G. TCR stimulation drives cleavage and shedding of the ITIM receptor CD31. THE JOURNAL OF IMMUNOLOGY 2010; 184:5485-92. [PMID: 20400708 DOI: 10.4049/jimmunol.0902219] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CD31 is a transmembrane molecule endowed with T cell regulatory functions owing to the presence of 2 immunotyrosine-based inhibitory motifs. For reasons not understood, CD31 is lost by a portion of circulating T lymphocytes, which appear prone to uncontrolled activation. In this study, we show that extracellular T cell CD31 comprising Ig-like domains 1 to 5 is cleaved and shed from the surface of human T cells upon activation via their TCR. The shed CD31 can be specifically detected as a soluble, truncated protein in human plasma. CD31 shedding results in the loss of its inhibitory function because the necessary cis-homo-oligomerization of the molecule, triggered by the trans-homophilic engagement of the distal Ig-like domain 1, cannot be established by CD31(shed) cells. However, we show that a juxta-membrane extracellular sequence, comprising part of the domain 6, remains expressed at the surface of CD31(shed) T cells. We also show that the immunosuppressive CD31 peptide aa 551-574 is highly homophilic and possibly acts by homo-oligomerizing with the truncated CD31 remaining after its cleavage and shedding. This peptide is able to sustain phosphorylation of the CD31 ITIM(686) and of SHP2 and to inhibit TCR-induced T cell activation. Finally, systemic administration of the peptide in BALB/c mice efficiently suppresses Ag-induced T cell-mediated immune responses in vivo. We conclude that the loss of T cell regulation caused by CD31 shedding driven by TCR stimulation can be rescued by molecular tools able to engage the truncated juxta-membrane extracellular molecule that remains exposed at the surface of CD31(shed) cells.
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Affiliation(s)
- Giulia Fornasa
- Institut National de la Santé de la Recherche Médicale, U698, Paris, France
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50
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Dejouvencel T, Féron D, Rossignol P, Sapoval M, Kauffmann C, Piot JM, Michel JB, Fruitier-Arnaudin I, Meilhac O. Hemorphin 7 reflects hemoglobin proteolysis in abdominal aortic aneurysm. Arterioscler Thromb Vasc Biol 2009; 30:269-75. [PMID: 19910633 DOI: 10.1161/atvbaha.109.198309] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE In human abdominal aortic aneurysm, the accumulation of blood-derived cells and proteases within the mural thrombus plays a pivotal role in the evolution toward vessel wall rupture. We sought to identify peptides released from abdominal aortic aneurysm specimens, characterized by an intraluminal thrombus. METHODS AND RESULTS Intraluminal thrombus samples were analyzed by differential proteomics, using surface-enhanced laser desorption/ionization time-of-flight mass spectrometry. A 1309-Da peptide was detected in larger amounts in the newly formed luminal thrombus layer relative to older layers. It was identified as being LVVYPWTQRF (known as LVV-Hemorphin 7), a peptide generated from hemoglobin by cathepsin D. By immunohistochemical analysis, we showed that Hemorphin 7 (H7) colocalizes with cathepsin D and cathepsin G in the luminal layer of the intraluminal thrombus. In vitro, cathepsin G was able to generate H7 peptides at pH 7.4, whereas cathepsin D was only active in acidic conditions. Finally, H7 peptides were shown to be increased 3- to 4-fold in sera of abdominal aortic aneurysm patients relative to controls, and their levels were positively correlated with the volume of the thrombus. CONCLUSIONS Our results suggest that circulating H7 peptides may reflect proteolysis of hemoglobin in the aneurysmal intraluminal thrombus and may be used as a biological marker of pathological vascular remodeling.
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