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Pihet S, Clément M, Terrapon E, Kipfer S. Adaptation of a psycho-educational group programme to improve coping in dementia caregiving: a feasibility study with mixed-methods. BMC Geriatr 2024; 24:197. [PMID: 38413890 PMCID: PMC10900645 DOI: 10.1186/s12877-024-04815-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 02/15/2024] [Indexed: 02/29/2024] Open
Abstract
BACKGROUND As the number of people living with dementia rapidly increases worldwide, the support provided by their informal caregivers remains key to the sustainability of most healthcare systems, this voluntary contribution representing 40% of the costs of dementia worldwide. Informal caregiving in dementia, however, is linked to long periods of chronic stress with frequent and serious negative consequences on the health and quality of life of the caregiver. A psycho-educational group intervention focusing on coping with the daily stress of dementia caregiving ("Learning to feel better… to help better"), developed in French-speaking Canada and showing broad effects on quality of life, was selected with the aim of 1) adapting it to a new cultural context (French-speaking Switzerland) based on identified facilitators and barriers, using a participative approach; and 2) conducting a feasibility study to evaluate whether the adapted programme showed similar or improved feasibility and effects compared to the original Canadian programme. METHODS A mixed-methods concurrent nested design was used to evaluate the feasibility and the effects on five quantitative core outcomes. Additional qualitative data helped document in depth the acceptability and impact of the intervention. RESULTS We shortened the programme from 30 to 21 h in total, which resulted in increased accessibility, in terms of facilitated recruitment of participants and inclusion of a broader range of informal caregivers. There were significant reductions in subjective burden (effect size: d = -0.32) and psychological distress (d = -0.48), as well as decreases in the stress reactions of informal caregivers related to the behaviour problems of the persons with dementia (d = -0.57). The qualitative results emphasized the usefulness of providing informal caregivers with structured procedures for efficiently tackling everyday challenges, and of enabling learning through a variety of channels and activities. CONCLUSIONS Substantial improvements are associated with this 21-h group intervention, organised in 7 sessions of 3 h each, focused on learning more efficient strategies to cope with the daily stress of dementia caregiving. This intervention empowered informal caregivers to master their daily challenges with more confidence, satisfaction and calm. TRIAL REGISTRATION ISRCTN13512408 (registration date 17.05.2021, retrospectively registered).
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Affiliation(s)
- Sandrine Pihet
- School of Health Sciences, HES-SO University of Applied Sciences and Arts Western Switzerland, Fribourg, Switzerland.
- Haute Ecole de Santé Fribourg, Route Des Arsenaux 16a, 1700, Fribourg, Switzerland.
| | - M Clément
- School of Health Sciences, HES-SO University of Applied Sciences and Arts Western Switzerland, Fribourg, Switzerland
| | - E Terrapon
- School of Health Sciences, HES-SO University of Applied Sciences and Arts Western Switzerland, Fribourg, Switzerland
| | - S Kipfer
- School of Health Sciences, HES-SO University of Applied Sciences and Arts Western Switzerland, Fribourg, Switzerland
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Cornée C, Weber M, Clément M. [Opacification of the FIL-SSF Carlevale intraocular lens: Report of two cases]. J Fr Ophtalmol 2023; 46:e350-e351. [PMID: 37652790 DOI: 10.1016/j.jfo.2023.03.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 02/18/2023] [Accepted: 03/04/2023] [Indexed: 09/02/2023]
Affiliation(s)
- C Cornée
- Service d'ophtalmologie, centre hospitalier Loire Vendée Océan, 20, boulevard Guérin, 85300 Challans, France; Service d'ophtalmologie, centre hospitalo-universitaire de Nantes, 1, place Alexis-Ricordeau, 44000 Nantes, France.
| | - M Weber
- Service d'ophtalmologie, centre hospitalo-universitaire de Nantes, 1, place Alexis-Ricordeau, 44000 Nantes, France
| | - M Clément
- Service d'ophtalmologie, centre hospitalier Loire Vendée Océan, 20, boulevard Guérin, 85300 Challans, France; Service d'ophtalmologie, centre hospitalo-universitaire de Nantes, 1, place Alexis-Ricordeau, 44000 Nantes, France
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Andreata F, Clément M, Benson RA, Hadchouel J, Procopio E, Even G, Vorbe J, Benadda S, Ollivier V, Ho-Tin-Noe B, Le Borgne M, Maffia P, Nicoletti A, Caligiuri G. CD31 signaling promotes the detachment at the uropod of extravasating neutrophils allowing their migration to sites of inflammation. eLife 2023; 12:e84752. [PMID: 37549051 PMCID: PMC10431918 DOI: 10.7554/elife.84752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 08/04/2023] [Indexed: 08/09/2023] Open
Abstract
Effective neutrophil migration to sites of inflammation is crucial for host immunity. A coordinated cascade of steps allows intravascular leukocytes to counteract the shear stress, transmigrate through the endothelial layer, and move toward the extravascular, static environment. Those events are tightly orchestrated by integrins, but, while the molecular mechanisms leading to their activation have been characterized, the regulatory pathways promoting their detachment remain elusive. In light of this, it has long been known that platelet-endothelial cell adhesion molecule (Pecam1, also known as CD31) deficiency blocks leukocyte transmigration at the level of the outer vessel wall, yet the associated cellular defects are controversial. In this study, we combined an unbiased proteomic study with in vitro and in vivo single-cell tracking in mice to study the dynamics and role of CD31 during neutrophil migration. We found that CD31 localizes to the uropod of migrating neutrophils along with closed β2-integrin and is required for essential neutrophil actin/integrin polarization. Accordingly, the uropod of Pecam1-/- neutrophils is unable to detach from the extracellular matrix, while antagonizing integrin binding to extracellular matrix components rescues this in vivo migratory defect. Conversely, we showed that sustaining CD31 co-signaling actively favors uropod detachment and effective migration of extravasated neutrophils to sites of inflammation in vivo. Altogether, our results suggest that CD31 acts as a molecular rheostat controlling integrin-mediated adhesion at the uropod of egressed neutrophils, thereby triggering their detachment from the outer vessel wall to reach the inflammatory sites.
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Affiliation(s)
- Francesco Andreata
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, Laboratory for Vascular Translational Science (LVTS)ParisFrance
| | - Marc Clément
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, Laboratory for Vascular Translational Science (LVTS)ParisFrance
| | - Robert A Benson
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of GlasgowGlasgowUnited Kingdom
| | - Juliette Hadchouel
- Université Paris Cité, INSERM, Paris Cardiovascular Research Center (PARCC)ParisFrance
| | - Emanuele Procopio
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, Laboratory for Vascular Translational Science (LVTS)ParisFrance
| | - Guillaume Even
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, Laboratory for Vascular Translational Science (LVTS)ParisFrance
| | - Julie Vorbe
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, Laboratory for Vascular Translational Science (LVTS)ParisFrance
| | - Samira Benadda
- Cell and Tissue Imaging Platform, INSERM, CNRS, ERL8252, Centre de Recherche sur l’Inflammation (CRI)ParisFrance
| | - Véronique Ollivier
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, Laboratory for Vascular Translational Science (LVTS)ParisFrance
| | - Benoit Ho-Tin-Noe
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, Laboratory for Vascular Translational Science (LVTS)ParisFrance
| | - Marie Le Borgne
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, Laboratory for Vascular Translational Science (LVTS)ParisFrance
| | - Pasquale Maffia
- Centre for Immunobiology, Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of GlasgowGlasgowUnited Kingdom
- Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico IINaplesItaly
| | - Antonino Nicoletti
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, Laboratory for Vascular Translational Science (LVTS)ParisFrance
| | - Giuseppina Caligiuri
- Université Paris Cité and Université Sorbonne Paris Nord, INSERM, Laboratory for Vascular Translational Science (LVTS)ParisFrance
- Department of Cardiology and of Physiology, Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpitaux Universitaires Paris Nord Val-de-Seine, Site BichatParisFrance
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5
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Lareyre F, Clément M, Cong Duy L, Raffort J. Reply to "Paeonol Suppresses Vasculogenesis Through Regulating Vascular Smooth Muscle Phenotypic Switching". J Endovasc Ther 2023:15266028231161233. [PMID: 36927136 DOI: 10.1177/15266028231161233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Fabien Lareyre
- Department of Vascular Surgery, Hospital of Antibes-Juan-les-Pins, Antibes, France.,Université Côte d'Azur, Inserm U1065, C3M, Nice, France
| | | | - Lê Cong Duy
- Department of Vascular Surgery, Hospital of Antibes-Juan-les-Pins, Antibes, France.,Université Côte d'Azur, Inserm U1065, C3M, Nice, France
| | - Juliette Raffort
- Université Côte d'Azur, Inserm U1065, C3M, Nice, France.,Clinical Chemistry Laboratory, University Hospital of Nice, Nice, France
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6
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Cornée C, Orignac I, Wargny M, Clément M, Varnier C, Le Meur G, Lebranchu P, Weber M. Implantation du dispositif XEN 45® dans la chirurgie du glaucome : étude bicentrique bispective s’intéressant au glaucome cortisonique par rapport au glaucome primitif à angle ouvert. J Fr Ophtalmol 2022; 45:872-882. [DOI: 10.1016/j.jfo.2022.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/15/2022] [Accepted: 04/21/2022] [Indexed: 10/16/2022]
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7
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Clément M, Ruivard M, Rieu V, Denis L, Grobost V, Le Guenno G. Tolérance de l’association méthotrexate et sulfaméthoxazole-triméthoprime faible dose en médecine interne : à propos de 30 patients. Rev Med Interne 2021. [DOI: 10.1016/j.revmed.2021.10.294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Clément M, Raffort J, Lareyre F, Mallat Z. [Autophagy in dendritic cells promotes atheroprotective regulatory T cells]. Med Sci (Paris) 2021; 37:216-218. [PMID: 33739265 DOI: 10.1051/medsci/2021003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Marc Clément
- Division of cardiovascular medicine, Université de Cambridge, Addenbrooke's Hospital, CB20QQ Cambridge, Royaume Uni
| | - Juliette Raffort
- Division of cardiovascular medicine, Université de Cambridge, Addenbrooke's Hospital, CB20QQ Cambridge, Royaume Uni. - Université Côte d'Azur, Inserm, Centre méditerranéen de recherche moléculaire, Hôpital universitaire de Nice, 06003 Nice, France
| | - Fabien Lareyre
- Division of cardiovascular medicine, Université de Cambridge, Addenbrooke's Hospital, CB20QQ Cambridge, Royaume Uni. - Université Côte d'Azur, Inserm, Centre méditerranéen de recherche moléculaire, Hôpital universitaire de Nice, 06003 Nice, France
| | - Ziad Mallat
- Division of cardiovascular medicine, Université de Cambridge, Addenbrooke's Hospital, CB20QQ Cambridge, Royaume Uni. - Inserm, Centre de recherche cardio-vasculaire (PARCC) HEGP, 75015 Paris, France
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9
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Wood EG, Macdougall CE, Blythe H, Clément M, Colas RA, Dalli J, Marelli-Berg F, Longhi MP. HIF1α activation in dendritic cells under sterile conditions promotes an anti-inflammatory phenotype through accumulation of intracellular lipids. Sci Rep 2020; 10:20825. [PMID: 33257753 PMCID: PMC7705732 DOI: 10.1038/s41598-020-77793-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 11/11/2020] [Indexed: 02/08/2023] Open
Abstract
Obesity is among the leading causes of elevated cardiovascular disease mortality and morbidity. Adipose tissue dysfunction, insulin resistance and inflammation are recognized as important risk factors for the development of cardiovascular disorders in obesity. Hypoxia appears to be a key factor in adipose tissue dysfunction affecting not only adipocytes but also immune cell function. Here we examined the effect of hypoxia-induced transcription factor HIF1α activation on classical dendritic cell (cDCs) function during obesity. We found that deletion of Hif1α on cDCs results in enhanced adipose-tissue inflammation and atherosclerotic plaque formation in a mouse model of obesity. This effect is mediated by HIF1α-mediated increased lipid synthesis, accumulation of lipid droplets and alter synthesis of lipid mediators. Our findings demonstrate that HIF1α activation in cDCs is necessary to control vessel wall inflammation.
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Affiliation(s)
- Elizabeth G Wood
- William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, EC1M 6BQ, UK
| | - Claire E Macdougall
- William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, EC1M 6BQ, UK
| | - Hazel Blythe
- William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, EC1M 6BQ, UK
| | - Marc Clément
- INSERM U1148, Laboratory for Vascular Translational Science, Hôpital Bichat, 46 rue Henri Huchard, 75018, Paris Cedex, France
| | - Romain A Colas
- William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, EC1M 6BQ, UK
| | - Jesmond Dalli
- William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, EC1M 6BQ, UK
| | - Federica Marelli-Berg
- William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, EC1M 6BQ, UK
| | - M Paula Longhi
- William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, EC1M 6BQ, UK.
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Clément M, Lareyre F, Loste A, Sannier A, Burel-Vandenbos F, Massiot N, Carboni J, Jean-Baptiste E, Caligiuri G, Nicoletti A, Raffort J. Vascular Remodeling and Immune Cell Infiltration in Splenic Artery Aneurysms. Angiology 2020; 72:539-549. [PMID: 32851875 DOI: 10.1177/0003319720952290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Rupture of splenic artery aneurysms (SAAs) is associated with a high mortality rate. The aim of this study was to identify the features of SAAs. Tissue sections from SAAs were compared to nonaneurysmal splenic arteries using various stains. The presence of intraluminal thrombus (ILT), vascular smooth muscle cells (VSMCs), cluster of differentiation (CD)-68+ phagocytes, myeloperoxidase+ neutrophils, CD3+, and CD20+ adaptive immune cells were studied using immunofluorescence microscopy. Analysis of SAAs revealed the presence of atherosclerotic lesions, calcifications, and ILT. Splenic artery aneurysms were characterized by a profound vascular remodeling with a dramatic loss of VSMCs, elastin degradation, adventitial fibrosis associated with enhanced apoptosis, and increased matrix metalloproteinase 9 expression. We observed an infiltration of immune cells comprising macrophages, neutrophils, T, and B cells. The T and B cells were found in the adventitial layer of SAAs, but their organization into tertiary lymphoid organs was halted. We failed to detect germinal centers even in the most organized T/B cell follicles and these lymphoid clusters lacked lymphoid stromal cells. This detailed histopathological characterization of the vascular remodeling during SAA showed that lymphoid neogenesis was incomplete, suggesting that critical mediators of their development must be missing.
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Affiliation(s)
- Marc Clément
- Université de Paris, LVTS, 121283INSERM U1148, Paris, France
| | - Fabien Lareyre
- Department of Vascular Surgery, 26992University Hospital of Nice, France.,Department of Vascular Surgery, University Hospital of Antibes-Juan-les-Pins, France.,439710Université Côte d'Azur, CHU, INSERM U1065, C3M, Nice, France
| | - Alexia Loste
- Université de Paris, LVTS, 121283INSERM U1148, Paris, France
| | - Aurélie Sannier
- Université de Paris, LVTS, 121283INSERM U1148, Paris, France
| | | | - Nicolas Massiot
- Department of Vascular Surgery, 26992University Hospital of Nice, France
| | - Joseph Carboni
- Department of Vascular Surgery, 26992University Hospital of Nice, France
| | - Elixène Jean-Baptiste
- Department of Vascular Surgery, 26992University Hospital of Nice, France.,439710Université Côte d'Azur, CHU, INSERM U1065, C3M, Nice, France
| | | | | | - Juliette Raffort
- 439710Université Côte d'Azur, CHU, INSERM U1065, C3M, Nice, France.,Clinical Chemistry Laboratory, 121283University Hospital of Nice, France
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11
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Paige E, Clément M, Lareyre F, Sweeting M, Raffort J, Grenier C, Finigan A, Harrison J, Peters JE, Sun BB, Butterworth AS, Harrison SC, Bown MJ, Lindholt JS, Badger SA, Kullo IJ, Powell J, Norman PE, Scott DJA, Bailey MA, Rose-John S, Danesh J, Freitag DF, Paul DS, Mallat Z. Interleukin-6 Receptor Signaling and Abdominal Aortic Aneurysm Growth Rates. Circ Genom Precis Med 2020; 12:e002413. [PMID: 30657332 PMCID: PMC6383754 DOI: 10.1161/circgen.118.002413] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Supplemental Digital Content is available in the text. Background: The Asp358Ala variant (rs2228145; A>C) in the IL (interleukin)-6 receptor (IL6R) gene has been implicated in the development of abdominal aortic aneurysms (AAAs), but its effect on AAA growth over time is not known. We aimed to investigate the clinical association between the IL6R-Asp358Ala variant and AAA growth and to assess the effect of blocking the IL-6 signaling pathway in mouse models of aortic aneurysm rupture or dissection. Methods: Using data from 2863 participants with AAA from 9 prospective cohorts, age- and sex-adjusted mixed-effects linear regression models were used to estimate the association between the IL6R-Asp358Ala variant and annual change in AAA diameter (mm/y). In a series of complementary randomized trials in mice, the effect of blocking the IL-6 signaling pathways was assessed on plasma biomarkers, systolic blood pressure, aneurysm diameter, and time to aortic rupture and death. Results: After adjusting for age and sex, baseline aneurysm size was 0.55 mm (95% CI, 0.13–0.98 mm) smaller per copy of the minor allele [C] of the Asp358Ala variant. Change in AAA growth was −0.06 mm per year (−0.18 to 0.06) per copy of the minor allele; a result that was not statistically significant. Although all available worldwide data were used, the genetic analyses were not powered for an effect size as small as that observed. In 2 mouse models of AAA, selective blockage of the IL-6 trans-signaling pathway, but not combined blockage of both, the classical and trans-signaling pathways, was associated with improved survival (P<0.05). Conclusions: Our proof-of-principle data are compatible with the concept that IL-6 trans-signaling is relevant to AAA growth, encouraging larger-scale evaluation of this hypothesis.
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Affiliation(s)
- Ellie Paige
- National Centre for Epidemiology and Population Health, Research School of Population Health, The Australian National University, Canberra, Australia (E.P.).,BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care (E.P., M.S., J.E.P., B.B.S., A.S.B., J.D., D.F.F., D.S.P.), University of Cambridge, United Kingdom
| | - Marc Clément
- Division of Cardiovascular Medicine (M.C., F.L., J.R., C.G., A.F., J.H., Z.M.), University of Cambridge, United Kingdom
| | - Fabien Lareyre
- Division of Cardiovascular Medicine (M.C., F.L., J.R., C.G., A.F., J.H., Z.M.), University of Cambridge, United Kingdom.,Université Côte d'Azur, Institut National de la Sante et de la Recherche Medicale, Centre Mediterranéen de Recherche Moleculaire (F.L., J.R.).,University Hospital of Nice, France (F.L., J.R.)
| | - Michael Sweeting
- BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care (E.P., M.S., J.E.P., B.B.S., A.S.B., J.D., D.F.F., D.S.P.), University of Cambridge, United Kingdom.,Department of Health Sciences (M.S.), University of Leicester
| | - Juliette Raffort
- Division of Cardiovascular Medicine (M.C., F.L., J.R., C.G., A.F., J.H., Z.M.), University of Cambridge, United Kingdom.,Université Côte d'Azur, Institut National de la Sante et de la Recherche Medicale, Centre Mediterranéen de Recherche Moleculaire (F.L., J.R.).,University Hospital of Nice, France (F.L., J.R.)
| | - Céline Grenier
- Division of Cardiovascular Medicine (M.C., F.L., J.R., C.G., A.F., J.H., Z.M.), University of Cambridge, United Kingdom
| | - Alison Finigan
- Division of Cardiovascular Medicine (M.C., F.L., J.R., C.G., A.F., J.H., Z.M.), University of Cambridge, United Kingdom
| | - James Harrison
- Division of Cardiovascular Medicine (M.C., F.L., J.R., C.G., A.F., J.H., Z.M.), University of Cambridge, United Kingdom
| | - James E Peters
- BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care (E.P., M.S., J.E.P., B.B.S., A.S.B., J.D., D.F.F., D.S.P.), University of Cambridge, United Kingdom.,British Heart Foundation Centre of Excellence, Division of Cardiovascular Medicine, Addenbrooke's Hospital, Cambridge, UK (J.E.P., A.S.B., S.C.H., J.D., D.F.F., D.S.P., Z.M.)
| | - Benjamin B Sun
- BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care (E.P., M.S., J.E.P., B.B.S., A.S.B., J.D., D.F.F., D.S.P.), University of Cambridge, United Kingdom
| | - Adam S Butterworth
- BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care (E.P., M.S., J.E.P., B.B.S., A.S.B., J.D., D.F.F., D.S.P.), University of Cambridge, United Kingdom.,British Heart Foundation Centre of Excellence, Division of Cardiovascular Medicine, Addenbrooke's Hospital, Cambridge, UK (J.E.P., A.S.B., S.C.H., J.D., D.F.F., D.S.P., Z.M.).,NIHR Blood and Transplant Research Unit in Donor Health and Genomics, Cambridge, United Kingdom (A.S.B., J.D.)
| | - Seamus C Harrison
- Department of Cardiovascular Sciences, NIHR Leicester Biomedical Research Centre (S.C.H., M.J.B.), University of Leicester.,British Heart Foundation Centre of Excellence, Division of Cardiovascular Medicine, Addenbrooke's Hospital, Cambridge, UK (J.E.P., A.S.B., S.C.H., J.D., D.F.F., D.S.P., Z.M.)
| | - Matthew J Bown
- Department of Cardiovascular Sciences, NIHR Leicester Biomedical Research Centre (S.C.H., M.J.B.), University of Leicester
| | - Jes S Lindholt
- Department of Cardiovascular and Thoracic Surgery, Elitary Research Centre of Individualised Medicine in Arterial Disease, Odense University Hospital, Denmark (J.S.L.)
| | - Stephen A Badger
- Regional Vascular Surgery Unit, Belfast Health and Social Care Trust, United Kingdom (S.A.B.)
| | - Iftikhar J Kullo
- Department of Cardiovascular Medicine, Gonda Vascular Center, Mayo Clinic, Rochester, MN (I.J.K.)
| | - Janet Powell
- Faculty of Medicine, Department of Surgery and Cancer, Imperial College London, United Kingdom (J.P.)
| | - Paul E Norman
- Medical School, University of Western Australia, Perth, Australia (P.E.N.)
| | - D Julian A Scott
- Leeds Vascular Institute, Leeds General Infirmary (D.J.A.S., M.A.B.).,Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, United Kingdom (D.J.A.S., M.A.B.)
| | - Marc A Bailey
- Leeds Vascular Institute, Leeds General Infirmary (D.J.A.S., M.A.B.).,Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, United Kingdom (D.J.A.S., M.A.B.)
| | - Stefan Rose-John
- Department of Biochemistry, Christian-Albrechts-University, Kiel, Germany (S.R.-J.)
| | - John Danesh
- BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care (E.P., M.S., J.E.P., B.B.S., A.S.B., J.D., D.F.F., D.S.P.), University of Cambridge, United Kingdom.,British Heart Foundation Centre of Excellence, Division of Cardiovascular Medicine, Addenbrooke's Hospital, Cambridge, UK (J.E.P., A.S.B., S.C.H., J.D., D.F.F., D.S.P., Z.M.).,NIHR Blood and Transplant Research Unit in Donor Health and Genomics, Cambridge, United Kingdom (A.S.B., J.D.).,Department of Human Genetics, Wellcome Sanger Institute, Hinxton, United Kingdom (J.D.)
| | - Daniel F Freitag
- BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care (E.P., M.S., J.E.P., B.B.S., A.S.B., J.D., D.F.F., D.S.P.), University of Cambridge, United Kingdom.,British Heart Foundation Centre of Excellence, Division of Cardiovascular Medicine, Addenbrooke's Hospital, Cambridge, UK (J.E.P., A.S.B., S.C.H., J.D., D.F.F., D.S.P., Z.M.)
| | - Dirk S Paul
- BHF Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care (E.P., M.S., J.E.P., B.B.S., A.S.B., J.D., D.F.F., D.S.P.), University of Cambridge, United Kingdom.,British Heart Foundation Centre of Excellence, Division of Cardiovascular Medicine, Addenbrooke's Hospital, Cambridge, UK (J.E.P., A.S.B., S.C.H., J.D., D.F.F., D.S.P., Z.M.)
| | - Ziad Mallat
- Division of Cardiovascular Medicine (M.C., F.L., J.R., C.G., A.F., J.H., Z.M.), University of Cambridge, United Kingdom.,British Heart Foundation Centre of Excellence, Division of Cardiovascular Medicine, Addenbrooke's Hospital, Cambridge, UK (J.E.P., A.S.B., S.C.H., J.D., D.F.F., D.S.P., Z.M.).,Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (Z.M.)
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12
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Raffort J, Lareyre F, Clément M, Hassen-Khodja R, Chinetti G, Mallat Z. Diabetes and aortic aneurysm: current state of the art. Cardiovasc Res 2019; 114:1702-1713. [PMID: 30052821 PMCID: PMC6198737 DOI: 10.1093/cvr/cvy174] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 07/19/2018] [Indexed: 12/17/2022] Open
Abstract
Aortic aneurysm is a life-threatening disease due to the risk of aortic rupture. The only curative treatment available relies on surgical approaches; drug-based therapies are lacking, highlighting an unmet need for clinical practice. Abdominal aortic aneurysm (AAA) is frequently associated with atherosclerosis and cardiovascular risk factors including male sex, age, smoking, hypertension, and dyslipidaemia. Thoracic aortic aneurysm (TAA) is more often linked to genetic disorders of the extracellular matrix and the contractile apparatus but also share similar cardiovascular risk factors. Intriguingly, a large body of evidence points to an inverse association between diabetes and both AAA and TAA. A better understanding of the mechanisms underlying the negative association between diabetes and aortic aneurysm could help the development of innovative diagnostic and therapeutic approaches to tackle the disease. Here, we summarize current knowledge on the relationship between glycaemic parameters, diabetes, and the development of aortic aneurysm. Cellular and molecular pathways that underlie the protective effect of diabetes itself and its treatment are reviewed and discussed, along with their potential implications for clinical translation.
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Affiliation(s)
- Juliette Raffort
- Division of Cardiovascular Medicine, Department of Medicine, University of Cambridge, Cambridge, Robinson Way, UK.,Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Team 5, Hôpital Européen Georges Pompidou, 56 rue Leblanc, Paris, France.,Department of Clinical Biochemistry, University Hospital of Nice, 30 avenue de la Voie Romaine, Nice Cedex 1, France.,Université Côte d'Azur, CHU, Inserm U1065, C3M, 151 Route de Ginestière, Nice Cedex 3, France
| | - Fabien Lareyre
- Division of Cardiovascular Medicine, Department of Medicine, University of Cambridge, Cambridge, Robinson Way, UK.,Université Côte d'Azur, CHU, Inserm U1065, C3M, 151 Route de Ginestière, Nice Cedex 3, France.,Department of Vascular Surgery, University Hospital of Nice, 30 avenue de la Voie Romaine, Nice Cedex 1, France
| | - Marc Clément
- Division of Cardiovascular Medicine, Department of Medicine, University of Cambridge, Cambridge, Robinson Way, UK
| | - Réda Hassen-Khodja
- Université Côte d'Azur, CHU, Inserm U1065, C3M, 151 Route de Ginestière, Nice Cedex 3, France.,Department of Vascular Surgery, University Hospital of Nice, 30 avenue de la Voie Romaine, Nice Cedex 1, France
| | - Giulia Chinetti
- Department of Clinical Biochemistry, University Hospital of Nice, 30 avenue de la Voie Romaine, Nice Cedex 1, France.,Université Côte d'Azur, CHU, Inserm U1065, C3M, 151 Route de Ginestière, Nice Cedex 3, France
| | - Ziad Mallat
- Division of Cardiovascular Medicine, Department of Medicine, University of Cambridge, Cambridge, Robinson Way, UK.,Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Team 5, Hôpital Européen Georges Pompidou, 56 rue Leblanc, Paris, France
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13
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Raffort J, Lareyre F, Clément M, Moratal C, Jean-Baptiste E, Hassen-Khodja R, Burel-Vandenbos F, Bruneval P, Chinetti G, Mallat Z. Transforming growth factor β neutralization finely tunes macrophage phenotype in elastase-induced abdominal aortic aneurysm and is associated with an increase of arginase 1 expression in the aorta. J Vasc Surg 2019; 70:588-598.e2. [DOI: 10.1016/j.jvs.2018.09.045] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 09/21/2018] [Indexed: 10/27/2022]
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14
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Affiliation(s)
- Marc Clément
- Division of Cardiovascular Medicine, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 2QQ, UK
| | - Ziad Mallat
- Division of Cardiovascular Medicine, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 2QQ, UK.,Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, Paris, France
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15
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Lehnert SJ, Kess T, Bentzen P, Kent MP, Lien S, Gilbey J, Clément M, Jeffery NW, Waples RS, Bradbury IR. Genomic signatures and correlates of widespread population declines in salmon. Nat Commun 2019; 10:2996. [PMID: 31278264 PMCID: PMC6611788 DOI: 10.1038/s41467-019-10972-w] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 06/11/2019] [Indexed: 12/27/2022] Open
Abstract
Global losses of biodiversity are occurring at an unprecedented rate, but causes are often unidentified. Genomic data provide an opportunity to isolate drivers of change and even predict future vulnerabilities. Atlantic salmon (Salmo salar) populations have declined range-wide, but factors responsible are poorly understood. Here, we reconstruct changes in effective population size (Ne) in recent decades for 172 range-wide populations using a linkage-based method. Across the North Atlantic, Ne has significantly declined in >60% of populations and declines are consistently temperature-associated. We identify significant polygenic associations with decline, involving genomic regions related to metabolic, developmental, and physiological processes. These regions exhibit changes in presumably adaptive diversity in declining populations consistent with contemporary shifts in body size and phenology. Genomic signatures of widespread population decline and associated risk scores allow direct and potentially predictive links between population fitness and genotype, highlighting the power of genomic resources to assess population vulnerability.
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Affiliation(s)
- S J Lehnert
- Fisheries and Oceans Canada, Northwest Atlantic Fisheries Centre, 80 E White Hills Rd, St. John's, Newfoundland, A1C 5X1, Canada.
| | - T Kess
- Fisheries and Oceans Canada, Northwest Atlantic Fisheries Centre, 80 E White Hills Rd, St. John's, Newfoundland, A1C 5X1, Canada
| | - P Bentzen
- Biology Department, Dalhousie University, 6050 University Avenue, Halifax, NS, B3H 4R2, Canada
| | - M P Kent
- Centre for Integrative Genetics (CIGENE), Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Norwegian University of Life Sciences, Ås, 1430, Norway
| | - S Lien
- Centre for Integrative Genetics (CIGENE), Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Norwegian University of Life Sciences, Ås, 1430, Norway
| | - J Gilbey
- Marine Scotland Science, Freshwater Fisheries Laboratory, Faskally, Pitlochry, PH16 5LB, UK
| | - M Clément
- Centre for Fisheries Ecosystems Research, Fisheries and Marine Institute of Memorial University of Newfoundland, 155 Ridge Rd, St. John's, NL, A1C 5R3, Canada
- Labrador Institute, Memorial University of Newfoundland, 219 Hamilton River Rd, Happy Valley-Goose Bay, NL, A0P 1E0, Canada
| | - N W Jeffery
- Fisheries and Oceans Canada, Bedford Institute of Oceanography, 1 Challenger Dr, Dartmouth, NS, B2Y 4A2, Canada
| | - R S Waples
- Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Seattle, WA, 98112, USA
| | - I R Bradbury
- Fisheries and Oceans Canada, Northwest Atlantic Fisheries Centre, 80 E White Hills Rd, St. John's, Newfoundland, A1C 5X1, Canada
- Biology Department, Dalhousie University, 6050 University Avenue, Halifax, NS, B3H 4R2, Canada
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16
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Lareyre F, Clément M, Moratal C, Loyer X, Jean-Baptiste E, Hassen-Khodja R, Chinetti G, Mallat Z, Raffort J. Differential micro-RNA expression in diabetic patients with abdominal aortic aneurysm. Biochimie 2019; 162:1-7. [DOI: 10.1016/j.biochi.2019.03.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 03/18/2019] [Indexed: 12/29/2022]
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17
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Clément M, Chappell J, Raffort J, Lareyre F, Vandestienne M, Taylor AL, Finigan A, Harrison J, Bennett MR, Bruneval P, Taleb S, Jørgensen HF, Mallat Z. Vascular Smooth Muscle Cell Plasticity and Autophagy in Dissecting Aortic Aneurysms. Arterioscler Thromb Vasc Biol 2019; 39:1149-1159. [PMID: 30943775 PMCID: PMC6544538 DOI: 10.1161/atvbaha.118.311727] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 03/21/2019] [Indexed: 12/21/2022]
Abstract
Objective- Recent studies suggested the occurrence of phenotypic switching of vascular smooth muscle cells (VSMCs) during the development of aortic aneurysm (AA). However, lineage-tracing studies are still lacking, and the behavior of VSMCs during the formation of dissecting AA is poorly understood. Approach and Results- We used multicolor lineage tracing of VSMCs to track their fate after injury in murine models of Ang II (angiotensin II)-induced dissecting AA. We also addressed the direct impact of autophagy on the response of VSMCs to AA dissection. Finally, we studied the relevance of these processes to human AAs. Here, we show that a subset of medial VSMCs undergoes clonal expansion and that VSMC outgrowths are observed in the adventitia and borders of the false channel during Ang II-induced development of dissecting AA. The clonally expanded VSMCs undergo phenotypic switching with downregulation of VSMC differentiation markers and upregulation of phagocytic markers, indicative of functional changes. In particular, autophagy and endoplasmic reticulum stress responses are activated in the injured VSMCs. Loss of autophagy in VSMCs through deletion of autophagy protein 5 gene ( Atg5) increases the susceptibility of VSMCs to death, enhances endoplasmic reticulum stress activation, and promotes IRE (inositol-requiring enzyme) 1α-dependent VSMC inflammation. These alterations culminate in increased severity of aortic disease and higher incidence of fatal AA dissection in mice with VSMC-restricted deletion of Atg5. We also report increased expression of autophagy and endoplasmic reticulum stress markers in VSMCs of human dissecting AAs. Conclusions- VSMCs undergo clonal expansion and phenotypic switching in Ang II-induced dissecting AAs in mice. We also identify a critical role for autophagy in regulating VSMC death and endoplasmic reticulum stress-dependent inflammation with important consequences for aortic wall homeostasis and repair.
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MESH Headings
- Adult
- Aged
- Aortic Dissection/chemically induced
- Aortic Dissection/metabolism
- Aortic Dissection/pathology
- Angiotensin II
- Animals
- Aorta/metabolism
- Aorta/pathology
- Aortic Aneurysm/chemically induced
- Aortic Aneurysm/metabolism
- Aortic Aneurysm/pathology
- Autophagy
- Autophagy-Related Protein 5/genetics
- Autophagy-Related Protein 5/metabolism
- Cell Lineage
- Cell Plasticity
- Cells, Cultured
- Disease Models, Animal
- Endoribonucleases/metabolism
- Female
- Humans
- Male
- Mice, 129 Strain
- Mice, Inbred C57BL
- Mice, Knockout, ApoE
- Middle Aged
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/pathology
- Myocytes, Smooth Muscle/metabolism
- Myocytes, Smooth Muscle/pathology
- Phenotype
- Protein Serine-Threonine Kinases/metabolism
- Signal Transduction
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Affiliation(s)
- Marc Clément
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.C., J.R., F.L., A.L.T., A.F., J.H., M.R.B., H.F.J., Z.M.)
| | - Joel Chappell
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.C., J.R., F.L., A.L.T., A.F., J.H., M.R.B., H.F.J., Z.M.)
| | - Juliette Raffort
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.C., J.R., F.L., A.L.T., A.F., J.H., M.R.B., H.F.J., Z.M.)
- Clinical Chemistry Laboratory (J.R.), University Hospital of Nice, and Université Côte d’Azur, France
| | - Fabien Lareyre
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.C., J.R., F.L., A.L.T., A.F., J.H., M.R.B., H.F.J., Z.M.)
- Department of Vascular Surgery (F.L.), University Hospital of Nice, and Université Côte d’Azur, France
| | - Marie Vandestienne
- Institut National de la Santé et de la Recherche Médicale, Universite Paris-Descartes, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France (M.V., P.B., S.T., Z.M.)
| | - Annabel L. Taylor
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.C., J.R., F.L., A.L.T., A.F., J.H., M.R.B., H.F.J., Z.M.)
| | - Alison Finigan
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.C., J.R., F.L., A.L.T., A.F., J.H., M.R.B., H.F.J., Z.M.)
| | - James Harrison
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.C., J.R., F.L., A.L.T., A.F., J.H., M.R.B., H.F.J., Z.M.)
| | - Martin R. Bennett
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.C., J.R., F.L., A.L.T., A.F., J.H., M.R.B., H.F.J., Z.M.)
| | - Patrick Bruneval
- Institut National de la Santé et de la Recherche Médicale, Universite Paris-Descartes, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France (M.V., P.B., S.T., Z.M.)
| | - Soraya Taleb
- Institut National de la Santé et de la Recherche Médicale, Universite Paris-Descartes, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France (M.V., P.B., S.T., Z.M.)
| | - Helle F. Jørgensen
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.C., J.R., F.L., A.L.T., A.F., J.H., M.R.B., H.F.J., Z.M.)
| | - Ziad Mallat
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.C., J.R., F.L., A.L.T., A.F., J.H., M.R.B., H.F.J., Z.M.)
- Institut National de la Santé et de la Recherche Médicale, Universite Paris-Descartes, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France (M.V., P.B., S.T., Z.M.)
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18
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Nze Ossima A, Michel M, Daval L, Vinet M, Clément M, Chevreul K. Comparaison des méthodes de recueil des consommations de soins des patients inclus dans les projets de recherche clinique intégrant une évaluation médico-économique. Rev Epidemiol Sante Publique 2019. [DOI: 10.1016/j.respe.2019.03.086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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19
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Clément M, Lebreton O, Chaillous L, Weber M. Dépistage de la rétinopathie diabétique par télétransmission de photographies du fond d’œil : évaluation et aspects épidémiologiques au CHU de Nantes. J Fr Ophtalmol 2019; 42:281-287. [DOI: 10.1016/j.jfo.2018.10.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 10/15/2018] [Indexed: 10/27/2022]
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20
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Clément M, Chappell J, Raffort J, Lareyre F, Vandestienne M, Taylor AL, Finigan A, Harrison J, Bennett MR, Bruneval P, Taleb S, Jørgensen HF, Mallat Z. P5 VASCULAR SMOOTH MUSCLE CELL PLASTICITY IN DISSECTING AORTIC ANEURYSMS. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy216.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- M Clément
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - J Chappell
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - J Raffort
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK
- Clinical Chemistry Laboratory
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - F Lareyre
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK
- Department of Vascular Surgery
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - M Vandestienne
- Institut National de la Santé et de la Recherche Médicale, Universite Paris-Descartes, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - A L Taylor
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - A Finigan
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - J Harrison
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - M R Bennett
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - P Bruneval
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK
- Institut National de la Santé et de la Recherche Médicale, Universite Paris-Descartes, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - S Taleb
- Institut National de la Santé et de la Recherche Médicale, Universite Paris-Descartes, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - H F Jørgensen
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - Z Mallat
- Institut National de la Santé et de la Recherche Médicale, Universite Paris-Descartes, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France
- Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
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21
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Clément M, Lareyre F, Raffort J, Saveljeva S, Masters L, Newland S, Finigan A, Harrison J, Kaser A, Mallat Z. O2 LOSS OF AUTOPHAGY IN DENDRITIC CELLS PROMOTES CD4+ TREG EXPANSION AND LIMITS THE DEVELOPMENT OF ATHEROSCLEROSIS IN MICE. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy216.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- M Clément
- From the Division of Cardiovascular Medicine
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - F Lareyre
- From the Division of Cardiovascular Medicine
- Department of Vascular Surgery
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - J Raffort
- From the Division of Cardiovascular Medicine
- Clinical Chemistry Laboratory
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - S Saveljeva
- Division of Gastroenterology and Hepatology
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - L Masters
- From the Division of Cardiovascular Medicine
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - S Newland
- From the Division of Cardiovascular Medicine
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - A Finigan
- From the Division of Cardiovascular Medicine
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - J Harrison
- From the Division of Cardiovascular Medicine
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - A Kaser
- Division of Gastroenterology and Hepatology
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
| | - Z Mallat
- From the Division of Cardiovascular Medicine
- University of Cambridge, Cambridge, UK
- Institut National de la Santé et de la Recherche Médicale, Universite Paris-Descartes, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France
- University Hospital of Nice, and Université Côte d'Azur, Nice, France
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22
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Lu Y, Scott IC, Clément M, Harrison JR, Newland SA, Yu X, Li X, McKenzie ANJ, Cohen ES, Mallat Z. P20 ERYTHROCYTE-DERIVED INTERLEUKIN-33 INSTRUCTS THE SPECIFICATION OF IRON-RECYCLING MACROPHAGES. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy216.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Y Lu
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, West Forvie Building, Forvie Site,Robinson Way, Cambridge, UK
| | - I C Scott
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, West Forvie Building, Forvie Site,Robinson Way, Cambridge, UK
| | - M Clément
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, West Forvie Building, Forvie Site,Robinson Way, Cambridge, UK
| | - J R Harrison
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, West Forvie Building, Forvie Site,Robinson Way, Cambridge, UK
| | - S A Newland
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, West Forvie Building, Forvie Site,Robinson Way, Cambridge, UK
| | - X Yu
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, West Forvie Building, Forvie Site,Robinson Way, Cambridge, UK
| | - X Li
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, West Forvie Building, Forvie Site,Robinson Way, Cambridge, UK
| | - A N J McKenzie
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, West Forvie Building, Forvie Site,Robinson Way, Cambridge, UK
| | - E S Cohen
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, West Forvie Building, Forvie Site,Robinson Way, Cambridge, UK
| | - Z Mallat
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, West Forvie Building, Forvie Site,Robinson Way, Cambridge, UK
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23
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Clément M, Haddad Y, Raffort J, Lareyre F, Newland SA, Master L, Harrison J, Ozsvar-Kozma M, Bruneval P, Binder CJ, Taleb S, Mallat Z. Deletion of IRF8 (Interferon Regulatory Factor 8)-Dependent Dendritic Cells Abrogates Proatherogenic Adaptive Immunity. Circ Res 2018; 122:813-820. [DOI: 10.1161/circresaha.118.312713] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 01/24/2018] [Accepted: 02/05/2018] [Indexed: 01/07/2023]
Abstract
Rationale:
Despite an established role for adaptive immune responses in atherosclerosis, the contribution of dendritic cells (DCs) and their various subsets is still poorly understood.
Objective:
Here, we address the role of IRF8 (interferon regulatory factor 8)-dependent DCs (lymphoid CD8α
+
and their developmentally related nonlymphoid CD103
+
DCs) in the induction of proatherogenic immune responses during high fat feeding.
Methods and Results:
Using a fate-mapping technique to track DCs originating from a DNGR1
+
(dendritic cell natural killer lectin group receptor 1) precursor (
Clec9a
+/cre
Rosa
+/EYFP
mice), we first show that YFP
hi
CD11c
hi
MHCII
hi
(major histocompatibility complex class II) DCs are present in the atherosclerotic aorta of low-density lipoprotein receptor–deficient (
Ldlr
−/−
) mice and are CD11b
–
CD103
+
IRF8
hi
. Restricted deletion of IRF8 in DCs (
Irf8
flox/flox
Cd11c
Cre
) reduces the accumulation of CD11c
hi
MHCII
hi
DCs in the aorta without affecting CD11b
+
CD103
–
DCs or macrophages but completely abolishes the accumulation of aortic CD11b
–
CD103
+
DCs. Lymphoid CD8α
+
DCs are also deleted. This is associated with a significant reduction of aortic T-cell accumulation and a marked reduction of high-fat diet–induced systemic T-cell priming, activation, and differentiation toward T helper type 1 cells, T follicular helper cells, and regulatory T cells. As a consequence, B-cell activation and germinal center responses to high-fat diet are also markedly reduced. IRF8 deletion in DCs significantly reduces the development of atherosclerosis, predominantly in the aortic sinus, despite a modest increase in total plasma cholesterol levels.
Conclusions:
IRF8 expression in DCs plays a nonredundant role in the development of proatherogenic adaptive immunity.
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Affiliation(s)
- Marc Clément
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.R., F.L., S.A.N., L.M., J.H., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (Y.H., P.B., S.T., Z.M.); Université Côte d’Azur, CHU, CNRS, Inserm, IRCAN, Nice, France (J.R., F.L.); Department of Vascular Surgery (F.L.) and Clinical Chemistry Laboratory (J.R.), University Hospital of Nice, France; Department of Laboratory Medicine, Medical
| | - Yacine Haddad
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.R., F.L., S.A.N., L.M., J.H., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (Y.H., P.B., S.T., Z.M.); Université Côte d’Azur, CHU, CNRS, Inserm, IRCAN, Nice, France (J.R., F.L.); Department of Vascular Surgery (F.L.) and Clinical Chemistry Laboratory (J.R.), University Hospital of Nice, France; Department of Laboratory Medicine, Medical
| | - Juliette Raffort
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.R., F.L., S.A.N., L.M., J.H., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (Y.H., P.B., S.T., Z.M.); Université Côte d’Azur, CHU, CNRS, Inserm, IRCAN, Nice, France (J.R., F.L.); Department of Vascular Surgery (F.L.) and Clinical Chemistry Laboratory (J.R.), University Hospital of Nice, France; Department of Laboratory Medicine, Medical
| | - Fabien Lareyre
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.R., F.L., S.A.N., L.M., J.H., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (Y.H., P.B., S.T., Z.M.); Université Côte d’Azur, CHU, CNRS, Inserm, IRCAN, Nice, France (J.R., F.L.); Department of Vascular Surgery (F.L.) and Clinical Chemistry Laboratory (J.R.), University Hospital of Nice, France; Department of Laboratory Medicine, Medical
| | - Stephen A. Newland
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.R., F.L., S.A.N., L.M., J.H., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (Y.H., P.B., S.T., Z.M.); Université Côte d’Azur, CHU, CNRS, Inserm, IRCAN, Nice, France (J.R., F.L.); Department of Vascular Surgery (F.L.) and Clinical Chemistry Laboratory (J.R.), University Hospital of Nice, France; Department of Laboratory Medicine, Medical
| | - Leanne Master
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.R., F.L., S.A.N., L.M., J.H., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (Y.H., P.B., S.T., Z.M.); Université Côte d’Azur, CHU, CNRS, Inserm, IRCAN, Nice, France (J.R., F.L.); Department of Vascular Surgery (F.L.) and Clinical Chemistry Laboratory (J.R.), University Hospital of Nice, France; Department of Laboratory Medicine, Medical
| | - James Harrison
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.R., F.L., S.A.N., L.M., J.H., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (Y.H., P.B., S.T., Z.M.); Université Côte d’Azur, CHU, CNRS, Inserm, IRCAN, Nice, France (J.R., F.L.); Department of Vascular Surgery (F.L.) and Clinical Chemistry Laboratory (J.R.), University Hospital of Nice, France; Department of Laboratory Medicine, Medical
| | - Maria Ozsvar-Kozma
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.R., F.L., S.A.N., L.M., J.H., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (Y.H., P.B., S.T., Z.M.); Université Côte d’Azur, CHU, CNRS, Inserm, IRCAN, Nice, France (J.R., F.L.); Department of Vascular Surgery (F.L.) and Clinical Chemistry Laboratory (J.R.), University Hospital of Nice, France; Department of Laboratory Medicine, Medical
| | - Patrick Bruneval
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.R., F.L., S.A.N., L.M., J.H., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (Y.H., P.B., S.T., Z.M.); Université Côte d’Azur, CHU, CNRS, Inserm, IRCAN, Nice, France (J.R., F.L.); Department of Vascular Surgery (F.L.) and Clinical Chemistry Laboratory (J.R.), University Hospital of Nice, France; Department of Laboratory Medicine, Medical
| | - Christoph J. Binder
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.R., F.L., S.A.N., L.M., J.H., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (Y.H., P.B., S.T., Z.M.); Université Côte d’Azur, CHU, CNRS, Inserm, IRCAN, Nice, France (J.R., F.L.); Department of Vascular Surgery (F.L.) and Clinical Chemistry Laboratory (J.R.), University Hospital of Nice, France; Department of Laboratory Medicine, Medical
| | - Soraya Taleb
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.R., F.L., S.A.N., L.M., J.H., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (Y.H., P.B., S.T., Z.M.); Université Côte d’Azur, CHU, CNRS, Inserm, IRCAN, Nice, France (J.R., F.L.); Department of Vascular Surgery (F.L.) and Clinical Chemistry Laboratory (J.R.), University Hospital of Nice, France; Department of Laboratory Medicine, Medical
| | - Ziad Mallat
- From the Division of Cardiovascular Medicine, University of Cambridge, United Kingdom (M.C., J.R., F.L., S.A.N., L.M., J.H., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (Y.H., P.B., S.T., Z.M.); Université Côte d’Azur, CHU, CNRS, Inserm, IRCAN, Nice, France (J.R., F.L.); Department of Vascular Surgery (F.L.) and Clinical Chemistry Laboratory (J.R.), University Hospital of Nice, France; Department of Laboratory Medicine, Medical
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24
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Lareyre F, Clément M, Raffort J, Pohlod S, Patel M, Esposito B, Master L, Finigan A, Vandestienne M, Stergiopulos N, Taleb S, Trachet B, Mallat Z. TGFβ (Transforming Growth Factor-β) Blockade Induces a Human-Like Disease in a Nondissecting Mouse Model of Abdominal Aortic Aneurysm. Arterioscler Thromb Vasc Biol 2017; 37:2171-2181. [PMID: 28912363 DOI: 10.1161/atvbaha.117.309999] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 08/21/2017] [Indexed: 01/08/2023]
Abstract
OBJECTIVE Current experimental models of abdominal aortic aneurysm (AAA) do not accurately reproduce the major features of human AAA. We hypothesized that blockade of TGFβ (transforming growth factor-β) activity-a guardian of vascular integrity and immune homeostasis-would impair vascular healing in models of nondissecting AAA and would lead to sustained aneurysmal growth until rupture. APPROACH AND RESULTS Here, we test this hypothesis in the elastase-induced AAA model in mice. We analyze AAA development and progression using ultrasound in vivo, synchrotron-based ultrahigh resolution imaging ex vivo, and a combination of biological, histological, and flow cytometry-based cellular and molecular approaches in vitro. Systemic blockade of TGFβ using a monoclonal antibody induces a transition from a self-contained aortic dilatation to a model of sustained aneurysmal growth, associated with the formation of an intraluminal thrombus. AAA growth is associated with wall disruption but no medial dissection and culminates in fatal transmural aortic wall rupture. TGFβ blockade enhances leukocyte infiltration both in the aortic wall and the intraluminal thrombus and aggravates extracellular matrix degradation. Early blockade of IL-1β or monocyte-dependent responses substantially limits AAA severity. However, blockade of IL-1β after disease initiation has no effect on AAA progression to rupture. CONCLUSIONS Endogenous TGFβ activity is required for the healing of AAA. TGFβ blockade may be harnessed to generate new models of AAA with better relevance to the human disease. We expect that the new models will improve our understanding of the pathophysiology of AAA and will be useful in the identification of new therapeutic targets.
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Affiliation(s)
- Fabien Lareyre
- From the Division of Cardiovascular Medicine, University of Cambridge, UK (F.L., M.C., J.R., M.P., L.M., A.F., Z.M.); Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut National de la Sante et de la Recherche Medicale, Institute for Research on Cancer and Aging in Nice, France (F.L., J.R.); University Hospital of Nice, France (F.L, J.R.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (B.E., M.V., S.T., Z.M.); Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Switzerland (S.P., N.S., B.T.); and IBiTech-bioMMeda (Institute Biomedical Technology-Biofluid, Tissue and Solid Mechanics for Medical Applications), Ghent University, Belgium (N.S., B.T.)
| | - Marc Clément
- From the Division of Cardiovascular Medicine, University of Cambridge, UK (F.L., M.C., J.R., M.P., L.M., A.F., Z.M.); Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut National de la Sante et de la Recherche Medicale, Institute for Research on Cancer and Aging in Nice, France (F.L., J.R.); University Hospital of Nice, France (F.L, J.R.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (B.E., M.V., S.T., Z.M.); Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Switzerland (S.P., N.S., B.T.); and IBiTech-bioMMeda (Institute Biomedical Technology-Biofluid, Tissue and Solid Mechanics for Medical Applications), Ghent University, Belgium (N.S., B.T.)
| | - Juliette Raffort
- From the Division of Cardiovascular Medicine, University of Cambridge, UK (F.L., M.C., J.R., M.P., L.M., A.F., Z.M.); Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut National de la Sante et de la Recherche Medicale, Institute for Research on Cancer and Aging in Nice, France (F.L., J.R.); University Hospital of Nice, France (F.L, J.R.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (B.E., M.V., S.T., Z.M.); Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Switzerland (S.P., N.S., B.T.); and IBiTech-bioMMeda (Institute Biomedical Technology-Biofluid, Tissue and Solid Mechanics for Medical Applications), Ghent University, Belgium (N.S., B.T.)
| | - Stefanie Pohlod
- From the Division of Cardiovascular Medicine, University of Cambridge, UK (F.L., M.C., J.R., M.P., L.M., A.F., Z.M.); Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut National de la Sante et de la Recherche Medicale, Institute for Research on Cancer and Aging in Nice, France (F.L., J.R.); University Hospital of Nice, France (F.L, J.R.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (B.E., M.V., S.T., Z.M.); Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Switzerland (S.P., N.S., B.T.); and IBiTech-bioMMeda (Institute Biomedical Technology-Biofluid, Tissue and Solid Mechanics for Medical Applications), Ghent University, Belgium (N.S., B.T.)
| | - Meghana Patel
- From the Division of Cardiovascular Medicine, University of Cambridge, UK (F.L., M.C., J.R., M.P., L.M., A.F., Z.M.); Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut National de la Sante et de la Recherche Medicale, Institute for Research on Cancer and Aging in Nice, France (F.L., J.R.); University Hospital of Nice, France (F.L, J.R.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (B.E., M.V., S.T., Z.M.); Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Switzerland (S.P., N.S., B.T.); and IBiTech-bioMMeda (Institute Biomedical Technology-Biofluid, Tissue and Solid Mechanics for Medical Applications), Ghent University, Belgium (N.S., B.T.)
| | - Bruno Esposito
- From the Division of Cardiovascular Medicine, University of Cambridge, UK (F.L., M.C., J.R., M.P., L.M., A.F., Z.M.); Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut National de la Sante et de la Recherche Medicale, Institute for Research on Cancer and Aging in Nice, France (F.L., J.R.); University Hospital of Nice, France (F.L, J.R.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (B.E., M.V., S.T., Z.M.); Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Switzerland (S.P., N.S., B.T.); and IBiTech-bioMMeda (Institute Biomedical Technology-Biofluid, Tissue and Solid Mechanics for Medical Applications), Ghent University, Belgium (N.S., B.T.)
| | - Leanne Master
- From the Division of Cardiovascular Medicine, University of Cambridge, UK (F.L., M.C., J.R., M.P., L.M., A.F., Z.M.); Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut National de la Sante et de la Recherche Medicale, Institute for Research on Cancer and Aging in Nice, France (F.L., J.R.); University Hospital of Nice, France (F.L, J.R.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (B.E., M.V., S.T., Z.M.); Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Switzerland (S.P., N.S., B.T.); and IBiTech-bioMMeda (Institute Biomedical Technology-Biofluid, Tissue and Solid Mechanics for Medical Applications), Ghent University, Belgium (N.S., B.T.)
| | - Alison Finigan
- From the Division of Cardiovascular Medicine, University of Cambridge, UK (F.L., M.C., J.R., M.P., L.M., A.F., Z.M.); Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut National de la Sante et de la Recherche Medicale, Institute for Research on Cancer and Aging in Nice, France (F.L., J.R.); University Hospital of Nice, France (F.L, J.R.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (B.E., M.V., S.T., Z.M.); Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Switzerland (S.P., N.S., B.T.); and IBiTech-bioMMeda (Institute Biomedical Technology-Biofluid, Tissue and Solid Mechanics for Medical Applications), Ghent University, Belgium (N.S., B.T.)
| | - Marie Vandestienne
- From the Division of Cardiovascular Medicine, University of Cambridge, UK (F.L., M.C., J.R., M.P., L.M., A.F., Z.M.); Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut National de la Sante et de la Recherche Medicale, Institute for Research on Cancer and Aging in Nice, France (F.L., J.R.); University Hospital of Nice, France (F.L, J.R.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (B.E., M.V., S.T., Z.M.); Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Switzerland (S.P., N.S., B.T.); and IBiTech-bioMMeda (Institute Biomedical Technology-Biofluid, Tissue and Solid Mechanics for Medical Applications), Ghent University, Belgium (N.S., B.T.)
| | - Nikolaos Stergiopulos
- From the Division of Cardiovascular Medicine, University of Cambridge, UK (F.L., M.C., J.R., M.P., L.M., A.F., Z.M.); Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut National de la Sante et de la Recherche Medicale, Institute for Research on Cancer and Aging in Nice, France (F.L., J.R.); University Hospital of Nice, France (F.L, J.R.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (B.E., M.V., S.T., Z.M.); Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Switzerland (S.P., N.S., B.T.); and IBiTech-bioMMeda (Institute Biomedical Technology-Biofluid, Tissue and Solid Mechanics for Medical Applications), Ghent University, Belgium (N.S., B.T.)
| | - Soraya Taleb
- From the Division of Cardiovascular Medicine, University of Cambridge, UK (F.L., M.C., J.R., M.P., L.M., A.F., Z.M.); Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut National de la Sante et de la Recherche Medicale, Institute for Research on Cancer and Aging in Nice, France (F.L., J.R.); University Hospital of Nice, France (F.L, J.R.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (B.E., M.V., S.T., Z.M.); Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Switzerland (S.P., N.S., B.T.); and IBiTech-bioMMeda (Institute Biomedical Technology-Biofluid, Tissue and Solid Mechanics for Medical Applications), Ghent University, Belgium (N.S., B.T.)
| | - Bram Trachet
- From the Division of Cardiovascular Medicine, University of Cambridge, UK (F.L., M.C., J.R., M.P., L.M., A.F., Z.M.); Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut National de la Sante et de la Recherche Medicale, Institute for Research on Cancer and Aging in Nice, France (F.L., J.R.); University Hospital of Nice, France (F.L, J.R.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (B.E., M.V., S.T., Z.M.); Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Switzerland (S.P., N.S., B.T.); and IBiTech-bioMMeda (Institute Biomedical Technology-Biofluid, Tissue and Solid Mechanics for Medical Applications), Ghent University, Belgium (N.S., B.T.)
| | - Ziad Mallat
- From the Division of Cardiovascular Medicine, University of Cambridge, UK (F.L., M.C., J.R., M.P., L.M., A.F., Z.M.); Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut National de la Sante et de la Recherche Medicale, Institute for Research on Cancer and Aging in Nice, France (F.L., J.R.); University Hospital of Nice, France (F.L, J.R.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, France (B.E., M.V., S.T., Z.M.); Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Switzerland (S.P., N.S., B.T.); and IBiTech-bioMMeda (Institute Biomedical Technology-Biofluid, Tissue and Solid Mechanics for Medical Applications), Ghent University, Belgium (N.S., B.T.).
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25
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Clément M, Basatemur G, Masters L, Baker L, Bruneval P, Iwawaki T, Kneilling M, Yamasaki S, Goodall J, Mallat Z. Clec4e signaling promotes pro-atherogenic macrophage responses. Atherosclerosis 2017. [DOI: 10.1016/j.atherosclerosis.2017.06.097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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26
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Loste A, Clément M, Delbosc S, Gaston AT, Morvan M, Even G, Andreata F, Deschamps L, Deschildre C, Louedec L, Arock M, Caligiuri G, Nicoletti A, Le Borgne M. Role of IgE antibodies and mast cells in atherosclerosis. Atherosclerosis 2017. [DOI: 10.1016/j.atherosclerosis.2017.06.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Haddad Y, Lahoute C, Clément M, Laurans L, Metghalchi S, Zeboudj L, Giraud A, Loyer X, Vandestienne M, Wain-Hobson J, Esposito B, Potteaux S, Ait-Oufella H, Tedgui A, Mallat Z, Taleb S. The Dendritic Cell Receptor DNGR-1 Promotes the Development of Atherosclerosis in Mice. Circ Res 2017; 121:234-243. [DOI: 10.1161/circresaha.117.310960] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 06/06/2017] [Accepted: 06/09/2017] [Indexed: 02/07/2023]
Abstract
Rationale:
Necrotic core formation during the development of atherosclerosis is associated with a chronic inflammatory response and promotes accelerated plaque development and instability. However, the molecular links between necrosis and the development of atherosclerosis are not completely understood. Clec9a (C-type lectin receptor) or DNGR-1 (dendritic cell NK lectin group receptor-1) is preferentially expressed by the CD8α
+
subset of dendritic cells (CD8α
+
DCs) and is involved in sensing necrotic cells. We hypothesized that sensing of necrotic cells by DNGR-1 plays a determinant role in the inflammatory response of atherosclerosis.
Objective:
We sought to address the impact of total, bone marrow–restricted, or CD8α
+
DC–restricted deletion of DNGR-1 on atherosclerosis development.
Methods and Results:
We show that total absence of DNGR-1 in Apoe (apolipoprotein e)–deficient mice (
Apoe
−/−
) and bone marrow–restricted deletion of DNGR-1 in Ldlr (low-density lipoprotein receptor)–deficient mice (
Ldlr
−/−
) significantly reduce inflammatory cell content within arterial plaques and limit atherosclerosis development in a context of moderate hypercholesterolemia. This is associated with a significant increase of the expression of interleukin-10 (IL-10). The atheroprotective effect of DNGR-1 deletion is completely abrogated in the absence of bone marrow–derived IL-10. Furthermore, a specific deletion of DNGR-1 in CD8α
+
DCs significantly increases IL-10 expression, reduces macrophage and T-cell contents within the lesions, and limits the development of atherosclerosis.
Conclusions:
Our results unravel a new role of DNGR-1 in regulating vascular inflammation and atherosclerosis and potentially identify a new target for disease modulation.
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Affiliation(s)
- Yacine Haddad
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
| | - Charlotte Lahoute
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
| | - Marc Clément
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
| | - Ludivine Laurans
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
| | - Sarvenaz Metghalchi
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
| | - Lynda Zeboudj
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
| | - Andreas Giraud
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
| | - Xavier Loyer
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
| | - Marie Vandestienne
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
| | - Julien Wain-Hobson
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
| | - Bruno Esposito
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
| | - Stephane Potteaux
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
| | - 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, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
| | - Alain Tedgui
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
| | - Ziad Mallat
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
| | - Soraya Taleb
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, Université Paris-Descartes, France (Y.H., C.L., L.L., S.M., L.Z., A.G., X.L., M.V., J.W.-H., B.E., S.P., H.A.-O., A.T., Z.M., S.T.); and Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke’s Hospital, United Kingdom (M.C., Z.M.)
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28
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Newland SA, Mohanta S, Clément M, Taleb S, Walker JA, Nus M, Sage AP, Yin C, Hu D, Kitt LL, Finigan AJ, Rodewald HR, Binder CJ, McKenzie ANJ, Habenicht AJ, Mallat Z. Type-2 innate lymphoid cells control the development of atherosclerosis in mice. Nat Commun 2017; 8:15781. [PMID: 28589929 PMCID: PMC5467269 DOI: 10.1038/ncomms15781] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 04/27/2017] [Indexed: 01/06/2023] Open
Abstract
Type-2 innate lymphoid cells (ILC2) are a prominent source of type II cytokines and are found constitutively at mucosal surfaces and in visceral adipose tissue. Despite their role in limiting obesity, how ILC2s respond to high fat feeding is poorly understood, and their direct influence on the development of atherosclerosis has not been explored. Here, we show that ILC2 are present in para-aortic adipose tissue and lymph nodes and display an inflammatory-like phenotype atypical of adipose resident ILC2. High fat feeding alters both the number of ILC2 and their type II cytokine production. Selective genetic ablation of ILC2 in Ldlr−/− mice accelerates the development of atherosclerosis, which is prevented by reconstitution with wild type but not Il5−/− or Il13−/− ILC2. We conclude that ILC2 represent a major innate cell source of IL-5 and IL-13 required for mounting atheroprotective immunity, which can be altered by high fat diet. Type-2 innate lymphoid cells (ILC2) affect adipose tissue metabolism and function. Here the authors show that the ILC2 are present in para-aortic adipose tissue and represent a major source of IL-5 and IL-13 required for mounting atheroprotective immunity, which can be altered by high fat diet.
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Affiliation(s)
- Stephen A Newland
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, Cambridge CB2 0SZ, UK
| | - Sarajo Mohanta
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-University (LMU), 80336 Munich, Germany
| | - Marc Clément
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, Cambridge CB2 0SZ, UK
| | - Soraya Taleb
- Institut National de la Santé et de la Recherche Médicale, U970 Paris, France
| | - Jennifer A Walker
- Division of Protein and Nucleic Acid Chemistry, MRC Laboratory of Molecular Biology, Cambridge CB2 0QH, UK
| | - Meritxell Nus
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, Cambridge CB2 0SZ, UK
| | - Andrew P Sage
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, Cambridge CB2 0SZ, UK
| | - Changjun Yin
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-University (LMU), 80336 Munich, Germany
| | - Desheng Hu
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, Xiamen University, Xiamen, Fujian 361102, China
| | - Lauren L Kitt
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, Cambridge CB2 0SZ, UK
| | - Alison J Finigan
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, Cambridge CB2 0SZ, UK
| | - Hans-Reimer Rodewald
- Division of Cellular Immunology, German Cancer Research Center, 69120 Heidelberg, Germany
| | - Christoph J Binder
- Department of Laboratory Medicine, Medical University of Vienna and Center for Molecular Medicine (CeMM) of the Austrian Academy of Sciences, 1090 Vienna, Austria
| | - Andrew N J McKenzie
- Division of Protein and Nucleic Acid Chemistry, MRC Laboratory of Molecular Biology, Cambridge CB2 0QH, UK
| | - Andreas J Habenicht
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-University (LMU), 80336 Munich, Germany
| | - Ziad Mallat
- Department of Medicine, Division of Cardiovascular Medicine, University of Cambridge, Cambridge CB2 0SZ, UK.,Institut National de la Santé et de la Recherche Médicale, U970 Paris, France
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29
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Yacine H, Lahoutte C, Clément M, Laurans L, Sarvenaz.Metghalchi S, Zeboudj L, Giraud A, Loyer X, Vandestienne M, Wain-Hobson J, Esposito B, Potteaux S, Ait-Oufella H, Reis e Sousa C, Tedgui A, Mallat Z, Taleb S. Abstract 226: C-type Lectin Receptor Clec9a on Cd8a+ Dendritic Cells Promotes the Development of Atherosclerosis in Mice. Arterioscler Thromb Vasc Biol 2017. [DOI: 10.1161/atvb.37.suppl_1.226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Necrotic core formation during the development of atherosclerosis is associated with a chronic inflammatory response and promotes accelerated plaque development and instability. We hypothesized that sensing of necrotic cells by CLEC9A, a C-type lectin receptors selectively expressed by the CD8α
+
subset of dendritic cells (CD8α
+
DCs), plays a determinant role in the inflammatory response of atherosclerosis.
Reconstitution of lethally-irradiated Ldlr-/- with bone marrow from CLEC9A-/- mice significantly reduced atherosclerotic lesion size in aortic root after 5 weeks of high fat diet (HFD) (-45%, p=0,0059) and after 7 weeks of HFD (-40%, p=0,0017), as compared to mice transplanted with wild-type bone marrow-derived cells. However, no effect of CLEC9A was observed after 13 weeks of HFD (p=0,4996), suggesting early effect of CLEC9A on atherosclerosis development.
The same phenotype was observed in 20-week-old Apoe-/-CLEC9A-/- compared to Apoe-/- mice put on chow diet (-50%, p=0,0022).
Interestingly, an increase of IL-10 expression (+60%, p=0,0093) was observed in spleens of mice deficient for CLEC9A. Furthermore, the beneficial effect observed in CLEC9A-/- was abolished in CLEC9A-/-IL-10-/- compared to IL-10-/- (p=0,4452). Moreover, a specific deletion of Clec9a in CD8α
+
DC cells significantly increases Il10 expression, reduces macrophage and T cell contents within the lesions, and significantly limits the development of atherosclerosis. In conclusion, our results identify a new role of Clec9a in regulating vascular inflammation and atherosclerosis development and potentially identify a new target for disease modulation.
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Affiliation(s)
| | | | - Marc Clément
- Dept of Medicine Div of Cardiovascular Medicine, Cambridge, United Kingdom
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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30
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Clément M, Courouge-Dorcier D, Tournilhac O, Trouillier S. Histiocytose langheransienne cutanée et syndrome myélodysplasique : une association fortuite ? Rev Med Interne 2016. [DOI: 10.1016/j.revmed.2016.10.240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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31
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Clément M, Basatemur G, Masters L, Baker L, Bruneval P, Iwawaki T, Kneilling M, Yamasaki S, Goodall J, Mallat Z. Necrotic Cell Sensor Clec4e Promotes a Proatherogenic Macrophage Phenotype Through Activation of the Unfolded Protein Response. Circulation 2016; 134:1039-1051. [DOI: 10.1161/circulationaha.116.022668] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 08/05/2016] [Indexed: 01/22/2023]
Abstract
Background:
Atherosclerotic lesion expansion is characterized by the development of a lipid-rich necrotic core known to be associated with the occurrence of complications. Abnormal lipid handling, inflammation, and alteration of cell survival or proliferation contribute to necrotic core formation, but the molecular mechanisms involved in this process are not properly understood. C-type lectin receptor 4e (Clec4e) recognizes the cord factor of Mycobacterium
tuberculosis
but also senses molecular patterns released by necrotic cells and drives inflammation.
Methods:
We hypothesized that activation of Clec4e signaling by necrosis is causally involved in atherogenesis. We addressed the impact of Clec4e activation on macrophage functions in vitro and on the development of atherosclerosis using low-density lipoprotein receptor–deficient (
Ldlr
−/−
) mice in vivo.
Results:
We show that Clec4e is expressed within human and mouse atherosclerotic lesions and is activated by necrotic lesion extracts. Clec4e signaling in macrophages inhibits cholesterol efflux and induces a Syk-mediated endoplasmic reticulum stress response, leading to the induction of proinflammatory mediators and growth factors.
Chop
and
Ire1a
deficiencies significantly limit Clec4e-dependent effects, whereas
Atf3
deficiency aggravates Clec4e-mediated inflammation and alteration of cholesterol efflux. Repopulation of
Ldlr
−/−
mice with
Clec4e
−/−
bone marrow reduces lipid accumulation, endoplasmic reticulum stress, and macrophage inflammation and proliferation within the developing arterial lesions and significantly limits atherosclerosis.
Conclusions:
Our results identify a nonredundant role for Clec4e in coordinating major biological pathways involved in atherosclerosis and suggest that it may play similar roles in other chronic inflammatory diseases.
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Affiliation(s)
- Marc Clément
- From Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (M.C., G.B., L.M., L.B., J.G., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, Paris, France (P.B., Z.M.); Iwawaki Laboratory, Advanced Scientific Research Leaders Development Unit, Gunma University, Maebashi, Gunma, Japan (T.I.); Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center and Department of Dermatology (M.K.), Eberhard Karls
| | - Gemma Basatemur
- From Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (M.C., G.B., L.M., L.B., J.G., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, Paris, France (P.B., Z.M.); Iwawaki Laboratory, Advanced Scientific Research Leaders Development Unit, Gunma University, Maebashi, Gunma, Japan (T.I.); Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center and Department of Dermatology (M.K.), Eberhard Karls
| | - Leanne Masters
- From Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (M.C., G.B., L.M., L.B., J.G., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, Paris, France (P.B., Z.M.); Iwawaki Laboratory, Advanced Scientific Research Leaders Development Unit, Gunma University, Maebashi, Gunma, Japan (T.I.); Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center and Department of Dermatology (M.K.), Eberhard Karls
| | - Lauren Baker
- From Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (M.C., G.B., L.M., L.B., J.G., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, Paris, France (P.B., Z.M.); Iwawaki Laboratory, Advanced Scientific Research Leaders Development Unit, Gunma University, Maebashi, Gunma, Japan (T.I.); Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center and Department of Dermatology (M.K.), Eberhard Karls
| | - Patrick Bruneval
- From Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (M.C., G.B., L.M., L.B., J.G., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, Paris, France (P.B., Z.M.); Iwawaki Laboratory, Advanced Scientific Research Leaders Development Unit, Gunma University, Maebashi, Gunma, Japan (T.I.); Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center and Department of Dermatology (M.K.), Eberhard Karls
| | - Takao Iwawaki
- From Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (M.C., G.B., L.M., L.B., J.G., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, Paris, France (P.B., Z.M.); Iwawaki Laboratory, Advanced Scientific Research Leaders Development Unit, Gunma University, Maebashi, Gunma, Japan (T.I.); Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center and Department of Dermatology (M.K.), Eberhard Karls
| | - Manfred Kneilling
- From Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (M.C., G.B., L.M., L.B., J.G., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, Paris, France (P.B., Z.M.); Iwawaki Laboratory, Advanced Scientific Research Leaders Development Unit, Gunma University, Maebashi, Gunma, Japan (T.I.); Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center and Department of Dermatology (M.K.), Eberhard Karls
| | - Sho Yamasaki
- From Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (M.C., G.B., L.M., L.B., J.G., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, Paris, France (P.B., Z.M.); Iwawaki Laboratory, Advanced Scientific Research Leaders Development Unit, Gunma University, Maebashi, Gunma, Japan (T.I.); Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center and Department of Dermatology (M.K.), Eberhard Karls
| | - Jane Goodall
- From Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (M.C., G.B., L.M., L.B., J.G., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, Paris, France (P.B., Z.M.); Iwawaki Laboratory, Advanced Scientific Research Leaders Development Unit, Gunma University, Maebashi, Gunma, Japan (T.I.); Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center and Department of Dermatology (M.K.), Eberhard Karls
| | - Ziad Mallat
- From Division of Cardiovascular Medicine, University of Cambridge, Cambridge, UK (M.C., G.B., L.M., L.B., J.G., Z.M.); Institut National de la Santé et de la Recherche Médicale, Paris Cardiovascular Research Center, Paris, France (P.B., Z.M.); Iwawaki Laboratory, Advanced Scientific Research Leaders Development Unit, Gunma University, Maebashi, Gunma, Japan (T.I.); Department of Preclinical Imaging and Radiopharmacy, Werner Siemens Imaging Center and Department of Dermatology (M.K.), Eberhard Karls
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32
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Galy A, Clément M, Bruneval P, Hyafil F, Papo T, Nicoletti A, Sacré K. Organes lymphoïdes tertiaires dans l’artérite de Takayasu : les lymphocytes B sont-ils impliqués dans la pathogénie ? Rev Med Interne 2016. [DOI: 10.1016/j.revmed.2016.04.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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33
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Metghalchi S, Ponnuswamy P, Simon T, Haddad Y, Laurans L, Clément M, Dalloz M, Romain M, Esposito B, Koropoulis V, Lamas B, Paul JL, Cottin Y, Kotti S, Bruneval P, Callebert J, den Ruijter H, Launay JM, Danchin N, Sokol H, Tedgui A, Taleb S, Mallat Z. Indoleamine 2,3-Dioxygenase Fine-Tunes Immune Homeostasis in Atherosclerosis and Colitis through Repression of Interleukin-10 Production. Cell Metab 2015; 22:460-71. [PMID: 26235422 DOI: 10.1016/j.cmet.2015.07.004] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 05/06/2015] [Accepted: 07/01/2015] [Indexed: 01/01/2023]
Abstract
Indoleamine 2,3-dioxygenase 1 (Ido1) is a rate-limiting enzyme that catalizes the degradation of tryptophan along the kynurenine pathway. Here, we show that Ido1 activity sustains an immunostimulatory potential through inhibition of interleukin (Il)10. In atherosclerosis, Ido1-dependent inhibition of Il10 translates into disease exacerbation. The resistance of Ido1-deficient mice to enhanced immune activation is broken in Ido1/Il10 double-deficient mice, which show exaggerated immune responses and develop severe spontaneous colitis. We demonstrate that Ido1 activity is required for the regulation of Il10 and that kynurenic acid (Kna), an Ido1-derived metabolite, is responsible for reduced Il10 production through activation of a cAMP-dependent pathway and inhibition of Erk1/2 phosphorylation. Resupplementation of Ido1-deficient mice with Kna limits Il10 expression and promotes atherosclerosis. In human atherosclerotic lesions, increased levels of Kna are associated with an unstable plaque phenotype, and its blood levels predict death and recurrent myocardial infarction in patients with coronary artery disease.
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Affiliation(s)
- Sarvenaz Metghalchi
- Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France
| | - Padmapriya Ponnuswamy
- Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France
| | - Tabassome Simon
- Assistance Publique, Hôpitaux de Paris (AP-HP), Hôpital St Antoine, UF de Pharmacologie Clinique, URC-EST, and Université Pierre et Marie Curie, Paris, France
| | - Yacine Haddad
- Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France
| | - Ludivine Laurans
- Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France
| | - Marc Clément
- Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke's Hospital, Cambridge CB2 2QQ, UK
| | - Marion Dalloz
- Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France
| | - Mélissa Romain
- Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France
| | - Bruno Esposito
- Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France
| | - Vincent Koropoulis
- Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France
| | - Bruno Lamas
- Avenir Team Gut Microbiota and Immunity, INSERM U1157/UMR CNRS 7203, UMR 1319 Micalis, INRA, Jouy-en-Josas, France, AP-HP Hôpital St Antoine, Department of Gastroenterology and Université Pierre et Marie Curie 6, Paris, France
| | - Jean-Louis Paul
- Université Paris-Sud, Equipe d'Accueil 4529, UFR de Pharmacie, Chatenay-Malabry, France and AP-HP, Hôpital Européen Georges Pompidou, Paris, France
| | - Yves Cottin
- Centre Hospitalo-Universitaire de Dijon, Service de Cardiologie, Dijon, France
| | - Salma Kotti
- Assistance Publique, Hôpitaux de Paris (AP-HP), Hôpital St Antoine, UF de Pharmacologie Clinique, URC-EST, and Université Pierre et Marie Curie, Paris, France
| | - Patrick Bruneval
- Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France; AP-HP, Hôpital Européen Georges Pompidou, Université Paris-Descartes, Paris, France
| | - Jacques Callebert
- AP-HP, Service de Biochimie and INSERM U942, Hôpital Lariboisière, Paris, France
| | - Hester den Ruijter
- Laboratory for Experimental Cardiology, University Medical Centre Utrecht, Utrecht, the Netherlands
| | - Jean-Marie Launay
- AP-HP, Service de Biochimie and INSERM U942, Hôpital Lariboisière, Paris, France
| | - Nicolas Danchin
- AP-HP, Hôpital Européen Georges Pompidou, Université Paris-Descartes, Paris, France
| | - Harry Sokol
- Avenir Team Gut Microbiota and Immunity, INSERM U1157/UMR CNRS 7203, UMR 1319 Micalis, INRA, Jouy-en-Josas, France, AP-HP Hôpital St Antoine, Department of Gastroenterology and Université Pierre et Marie Curie 6, Paris, France
| | - Alain Tedgui
- Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France
| | - Soraya Taleb
- Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France.
| | - Ziad Mallat
- Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 970, Paris Cardiovascular Research Center, and Université Paris-Descartes, Paris, France; Division of Cardiovascular Medicine, University of Cambridge, Addenbrooke's Hospital, Cambridge CB2 2QQ, UK.
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Bourre JM, Dumont O, Piciotti M, Clément M, Chaudière J, Bonneil M, Nalbone G, Lafont H, Pascal G, Durand G. Essentiality of omega 3 fatty acids for brain structure and function. World Rev Nutr Diet 2015; 66:103-17. [PMID: 2053331 DOI: 10.1159/000419283] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- J M Bourre
- INSERM Unité 26, Hôpital Fernand Widal, Paris, France
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Gillet H, Clément M, Choisy AM, Seux R. Evaluation du niveau de contamination des eaux de surface par les produits phytosanitaires. ACTA ACUST UNITED AC 2010. [DOI: 10.1051/water/19952601057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Verdot C, Champely S, Clément M, Massarelli R. La pratique physique, un moyen de circonscrire les effets délétères du confinement en milieu carcéral : impact d’un programme d’activités physiques sur la santé perçue et le bien-être psychologique de détenus. Psychologie du Travail et des Organisations 2010. [DOI: 10.1016/s1420-2530(16)30161-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Clément M, Tremblay J, Lange M, Thibodeau J, Belhumeur P. Purification and identification of bovine cheese whey fatty acids exhibiting in vitro antifungal activity. J Dairy Sci 2008; 91:2535-44. [PMID: 18565910 DOI: 10.3168/jds.2007-0806] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Milk lipids contain several bioactive factors exhibiting antimicrobial activity against bacteria, viruses, and fungi. In the present study, we demonstrate that free fatty acids (FFA) derived from the saponification of bovine whey cream lipids are active in vitro at inhibiting the germination of Candida albicans, a morphological transition associated with pathogenicity. This activity was found to be significantly increased when bovine FFA were enriched in non-straight-chain FFA. At low cell density, this non-straight-chain FFA-enriched fraction was also found to inhibit in a dose-dependant manner the growth of both developmental forms of C. albicans as well as the growth of Aspergillus fumigatus. Using an assay-guided fractionation, the main components responsible for these activities were isolated. On the basis of mass spectroscopic and gas chromatographic analysis, antifungal compounds were identified as capric acid (C10:0), lauroleic acid (C12:1), 11-methyldodecanoic acid (iso-C13:0), myristoleic acid (C14:1n-5), and gamma-linolenic acid (C18:3n-6). The most potent compound was gamma-linolenic acid, with minimal inhibitory concentration values of 5.4 mg/L for C. albicans and 1.3 mg/L for A. fumigatus, in standardized conditions. The results of this study indicate that bovine whey contains bioactive fatty acids exhibiting antifungal activity in vitro against 2 important human fungal pathogens.
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Affiliation(s)
- M Clément
- Département de microbiologie et immunologie, Université de Montréal, C.P. 6128, succ. Centreville, Montréal, Québec, H3C 3J7, Canada.
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Decaux O, Lodé L, Magrangeas F, Clément M, Charbonnel C, Gouraud W, Bataille R, Avet-Loiseau H, Minvielle S. Pharmacogénomique du bortezomib: recherche de voies de signalisation impliquées dans la résistance au bortezomib. Rev Med Interne 2007. [DOI: 10.1016/j.revmed.2007.03.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
Survivin is a fascinating member of the inhibitor of apoptosis protein (IAP) family with its dual roles in mitosis and apoptosis, and emerges as an attractive target for cancer therapy. Multiple myeloma (MM) is a plasma cell malignancy, characterized by deregulated proliferation, cell-death processes and fatal outcome. We thus investigated survivin expression in myeloma cells and its role in MM biology to evaluate its potential interest as a target in MM treatment. Our results describe the cancer-specific overexpression of survivin in myeloma cells and show a significant correlation between survivin expression at protein level and clinical course of MM. Moreover, survivin knockdown by RNA interference led to growth rate inhibition of myeloma cells related to apoptosis induction and deep cell-cycle disruption. Finally, survivin knockdown sensitized myeloma cells to conventional anti-myeloma agents. Altogether, these data argue for the interest to evaluate survivin antagonists in MM treatment.
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Affiliation(s)
- M Romagnoli
- 1INSERM, UMR 601, 9 quai Moncousu, Nantes, F-44093, France
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Arsenault J, Renaud MPLH, Clément M, Fillion D, Guillemette G, Leduc R, Lavigne P, Escher E. Temperature-dependent variations of ligand-receptor contact points in hAT1. J Pept Sci 2007; 13:575-80. [PMID: 17600857 DOI: 10.1002/psc.875] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Photoaffinity labelling is regularly used to investigate proteins, including peptidergic G protein-coupled receptors (GPCR). To this purpose benzophenone photolabels have been widely used to identify many contact residues in ligand-binding pockets. The three-dimensional binding environment of the human angiotensin II type 1 receptor hAT(1) has been determined using an iterative methionine mutagenesis strategy based on the photochemical properties and preferential incorporation of benzophenone onto methionine. This has led to the construction of a ligand-bound receptor structure. The present study investigated the effect of temperature on the accessibility of some of these contact points. The hAT(1) receptor and two representative Met mutants (H256M-hAT(1) and F293M-hAT(1)) from the iterative mutagenesis study were photolabelled with the benzophenone-ligand (125)I-[Sar(1), Bpa(8)]AngII at temperatures ranging from - 15 degrees C to 37 degrees C. Labelled receptors were partially purified and digested with cyanogen bromide to identify the contact points or segments. There were no changes in receptor contacts or labelling in the 7th transmembrane domains (TMD) of hAT(1) and F293M-hAT(1) across the temperature range. However, a temperature-dependent change in the ligand-receptor contact of H256M-hAT(1) was observed. At - 15 degrees C, H256M labelling was identical to that of hAT(1), indicating that the interaction was specific to the 7th TMD. Significant labelling changes were observed at higher temperatures and at 37 degrees C labelling occurred almost exclusively at mutated residue H256M-hAT(1) in the 6th TMD. Simultaneous competitive labelling of different areas of this target protein indicated that the ligand-receptor structure became increasingly fluctual at physiological temperatures, while a more compact, low mobility, and low energy conformation prevailed at low temperatures.
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Affiliation(s)
- J Arsenault
- Département de pharmacologie, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, 3001, 12ième Avenue Nord, Sherbrooke, Quebec, J1H 5N4, Canada
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Clément M, Duquenoy S, Koussa M, Beregi JP, Mounier-Vehier C. [Hypertension revealing aneurysmal renal fibrodysplasia]. ACTA ACUST UNITED AC 2006; 30:296-300. [PMID: 16439942 DOI: 10.1016/s0398-0499(05)83846-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
A 20-year-old woman consulted for severe hypertension which revealed aneurismal stenosing fibrodysplasia of the renal arteries. The diagnosis was established by duplex Doppler which visualized tight stenosis of the distal portion of the right renal artery and the proximal portion of the left, associated with aneurismal lesions downstream from the strictures (1.8 cm on the right and 1.3 cm on the left). The lesions were highly suggestive of fibrodysplasia and were confirmed by magnetic resonance angiography. Endoluminal revascularization was undertaken because of the severe hypertension and the presence of arterial lesions. Revascularization was unsuccessful and severe hypertension persisted. Surgery was performed in two stages. The first procedure consisted in resection of the left aneurismal lesion with aortorenal internal saphene bypass. Secondarily, exclusion of the right aneurysm was performed with cure of the stricture by extracorporal renal surgery with anastomosis of the renal artery to the aorta and the renal vein to the vena cava. Clinical outcome was favorable. Angioscan and duplex Doppler controls at three and six months confirmed the anatomic success of the revascularization. Aneurysm of the renal artery, like renal artery stenotic dysplasia, is a rare but probably underestimated condition due to insufficient screening. This diagnosis should be entertained in hypertensive young women. There is risk of rupture of the aneurysm. Aneurysmal lesions can be associated with renal artery stenosis which usually involves a short segment of the artery, as in our case. Renal aneurysms should be treated when one of the following elements is present: aneurysm measuring more than 20 mm, progressing aneurysm, dissection, discovery in a patient with a renal risk (single kidney, renal insufficiency), desire for pregnancy, severe hypertension recently discovered in a young subject associated with dysplastic stenosis, isolated aneurysm associated with recent severe hypertension, as reported here.
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Affiliation(s)
- M Clément
- Service de Médecine Vasculaire et HTA, CHRU-Hôpital Cardiologique, 59037 Lille Cedex, France
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Briand O, Seux R, Millet M, Clément M. Influence de la pluviométrie sur la contamination de l'atmosphère et des eaux de pluie par les pesticides. ACTA ACUST UNITED AC 2005. [DOI: 10.7202/705480ar] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cette étude a pour objectif d'identifier les facteurs qui influencent la contamination des eaux de pluie par les produits phytosanitaires. Cinq sites contrastés ont été choisis de manière à être représentatifs des zones de productions légumières ou de plein champs et à couvrir les différents modes de contamination des précipitations. Il s'agit des sites de l'Ile de Ouessant, Landivisiau, Plouay, Ploufragan et Rennes. Les évènements pluvieux collectés sont choisis en fonction des caractéristiques de formation de la perturbation et du calendrier des épandages de pesticides.
Par ailleurs, les concentrations rencontrées pour le site de Rennes en 2000 (année très humide) ont pu être comparées à celles obtenues lors d'une étude conduite en 1996 sur un site proche mais pour des conditions climatiques plus habituelles (année humide à sèche).
Les analyses sont réalisées par extraction en phase solide suivie d'une analyse en chromatographie en phase gazeuse couplée à la spectrométrie de masse, ou par détection azote-phosphore spécifique (NPD) ou détection par capture d'électrons pour les composés halogénés (ECD). Dans ces deux derniers cas, la confirmation de l'identité des produits est réalisée par un système de double colonnes.
Sept évènements pluvieux distincts ont été collectés et analysés entre les 15 mars et 15 juillet de l'année 2000. Parmis les produits recherchés six molécules sont régulièrement retrouvées : l'atrazine et son métabolite la déethylatrazine (DEA), l'alachlore, le lindane (gamma HCH) et son isomère le béta HCH ainsi que la desméthryne. Nous avions déjà des observations analogues à l'issu de nos premières investigations de 1996.
Les analyses réalisées ont montré l'existence d'une contamination chronique du compartiment atmosphérique par l'atrazine et la DEA pour les zones sous influence agricole. Les niveaux de concentrations rencontrés sont faibles, de l'ordre de 10 ng/L. A ce bruit de fond s'ajoutent en période de traitement, des transferts depuis les parcelles traitées qui conduisent à des valeurs beaucoup plus élevées (de 0,1 à 0,7 µg.L-1). La détection de l'alachlore et de la desmethryne est limitée aux périodes d'application de ces produits.
Du lindane, et dans un cas son isomère le béta-HCH, ont pu être mis en évidence sur quelques prélèvements, traduisant une contamination chronique du compartiment aérien due à la rémanence de ce type de composés.
Les concentrations dans les pluies, pour un site donné, sont très dépendantes de la pluviométrie. Alors qu'en année de pluviosité normale (1996), les concentrations en période d'application sont élevées, elles restent faibles pour une année humide (2000). Pour s'affranchir de l'effet de dilution, nous avons calculé des retombées massiques (mg.ha-1) pour les deux périodes de collecte de 1996 et 2000. Les résultats de 2000 restent malgré cela très inférieurs à ceux de 1996 (d'un facteur quatre environ). Les surfaces emblavées et les différences d'usage entre les deux années sont trop faibles pour expliquer les écarts obtenus. Ceci nous permet de conclure que c'est l'intensité des transferts sol-air qui détermine les niveaux de contamination de l'atmosphère. L'humidité élevée des sols, pour une année humide, favorise la migration verticale des produits phytosanitaires dans les couches inférieures, réduisant ainsi les concentrations de pesticides susceptibles d'être transférés vers le compartiment aérien.
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Le Bot B, Colliaux K, Pelle D, Briens C, Seux R, Clément M. Optimization and performance evaluation of the analysis of glyphosate and AMPA in water by HPLC with fluorescence detection. Chromatographia 2002. [DOI: 10.1007/bf02493205] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Carrié I, Smirnova M, Clément M, DE JD, Francès H, Bourre JM. Docosahexaenoic acid-rich phospholipid supplementation: effect on behavior, learning ability, and retinal function in control and n-3 polyunsaturated fatty acid deficient old mice. Nutr Neurosci 2002; 5:43-52. [PMID: 11929197 DOI: 10.1080/10284150290007074] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
This study investigated the effects of docosahexaenoic acid (DHA)-rich phospholipid supplementation on behavior, electroretinogram and phospholipid fatty acid (PUFA) composition in selected brain regions and retina in old mice. Two groups of mice were fed a semisynthetic balanced diet or a diet deficient in alpha-linolenic acid. At the age of 8 months, half of each diet group was supplemented with DHA. In the open field, no differences in motor or exploratory activities were observed between the four diet groups. In the light/dark test of anxiety, the time spent in the light compartment was significantly higher in both supplemented groups than in control and deficient groups. Learning performance in the Morris water maze was significantly impaired in deficient old mice, but was completely restored by the phospholipid supplementation. The electroretinogram showed a significant alteration of a- and b-wave amplitudes in control compared to deficient mice. Phospholipid supplementation induced a significant increase of b-wave amplitude in both control and deficient groups and restored normal fatty acid composition in brain regions and retina in deficient mice. DHA-rich phospholipids may improve learning ability, visual function and reverse biochemical modifications in old mice fed an n-3 polyunsaturated fatty acid-deficient diet; they also may improve visual function in old mice fed a balanced diet.
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Affiliation(s)
- I Carrié
- INSERM U26, Unité de Neuro-Pharmaco-Nutrition, Paris, France
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Clément M, Lavallée F, Barbès-Morin G, de Repentigny L, Belhumeur P. Overexpression of Bud5p can suppress mutations in the Gsp1p guanine nucleotide exchange factor Prp20p in Saccharomyces cerevisiae. Mol Genet Genomics 2001; 266:20-7. [PMID: 11589573 DOI: 10.1007/s004380100511] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The gene product Prp20p, which is located in the nucleus, serves as the nucleotide exchange factor (GEF) for the small nuclear G protein Gsp1p in Saccharomyces cerevisiae, and catalyses the replacement of Gsp1-bound GDP by GTP. These proteins are involved in numerous cellular processes, including nucleocytoplasmic trafficking of macromolecules, cell cycle progression, DNA replication and maintenance of chromosome structure/stability. It is believed that in order to complete a full GDP/GTP cycle, Gsp1p has to shuttle between the nucleus and the cytoplasm, where its GTPase Activating Protein (GAP) Rna1p is located. Here, we report on the ability of Bud5p, the exchange factor for Rsr1p, to suppress conditional prp20 mutants when an extra copy of GSP1 is present. This suppression by BUD5 can be reversed by simultaneous overexpression of RNA1, and is not Rsr1p-dependent, nor allele-specific. We also show that Bud5p can physically interact with Gsplp, both in vitro and in vivo. These,findings raise the possibility that Bud5p could act as a cytoplasmic exchange factor for Gsp1p and, therefore, that a complete GDP/GTP cycle could take place in the cytoplasm.
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Affiliation(s)
- M Clément
- Département de Microbiologie et Immunologie, Université de Montréal, Québec, Canada
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Abstract
The yeast Ran binding protein 1 (Yrb1p) is a small protein of 23 kDa that is highly conserved among eukaryotes. It stimulates the GTPase activity of Gsp1p in the presence of the GTPase activating protein Rna1p. In addition to its role in nucleocytoplasmic transport of macromolecules, YRB1/RanBP1 could be involved in the regulation of microtubules structure and dynamics. Since microtubules are tightly associated with morphological changes, we have been interested to study the role and function of YRB1 in the pathogenic fungus Candida albicans, where there is regulated change in cellular morphology. The gene product of CaYRB1 encodes a 212 amino acid protein displaying 73% homology to the S. cerevisiae homologue. The bacterially expressed gene product has an apparent molecular weight of 35.7 kDa. We show that it can complement a S. cerevisiae yrb1 null mutant and that its mRNA does not appear to be regulated in response to conditions inducing morphological changes in C. albicans.
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Affiliation(s)
- M Clément
- Department of Microbiology and Immunology, Université de Montréal, C.P. 6128, succ. Centre-Ville, Montréal, Quebec H3C 3J7, Canada
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Marionneau S, Cailleau-Thomas A, Rocher J, Le Moullac-Vaidye B, Ruvoën N, Clément M, Le Pendu J. ABH and Lewis histo-blood group antigens, a model for the meaning of oligosaccharide diversity in the face of a changing world. Biochimie 2001; 83:565-73. [PMID: 11522384 DOI: 10.1016/s0300-9084(01)01321-9] [Citation(s) in RCA: 241] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Antigens of the ABH and Lewis histo-blood group family have been known for a long time. Yet their biological meaning is still largely obscure. Based on the available knowledge about the genes involved in their biosynthesis and about their tissue distribution in humans and other mammals, we discuss here the selective forces that may maintain or propagate these oligosaccharide antigens. The ABO, alpha 1,2fucosyltransferase and alpha 1,3fucosyltransferase enzyme families have been generated by gene duplications. Members of these families contribute to biosynthesis of the antigens through epistatic interactions. We suggest that the highly polymorphic genes of each family provide intraspecies diversity that allows coping with diverse and rapidly evolving pathogens. In contrast, the genes of low frequency polymorphism are expected to play roles at the cellular level, although they may be dispensable at the individual level. In addition, some members of these three gene families are expected to be functionally redundant and may either provide a reservoir for additional diversity in the future or become inactivated. We also discuss the role of the ABH and Lewis histo-blood group antigens in pathologies such as cancer and cardiovascular diseases, but argue that it is merely incidental and devoid of evolutionary impact.
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Affiliation(s)
- S Marionneau
- INSERM U419, Institute of Biology, 9, quai Moncousu, 44093 Nantes, France
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Abstract
Antigens of the ABH and Lewis histo-blood group family can be found on many normal cells, mainly of epithelial type. In carcinomas, altered expression of the various carbohydrate epitopes of this family occur, and are often strongly associated with either a good or bad prognosis. A review of the available data on these tumor-associated markers, their biosynthesis and their prognostic value is proposed here. For a long time it has been unclear whether their presence could affect the behavior of carcinoma cells. Recent data, however, indicate that they play biological roles in the course of tumor progression. The presence of sialyl-Le(a) or sialyl-Le(x), which are ligands for selectins, promotes the metastatic process by facilitating interaction with the endothelium of distant organs. The loss of A and B antigens increases cellular motility, while the presence of H epitopes increases resistance to apoptosis by mechanisms that remain to be defined. The Le(y) antigen has procoagulant and angiogenic activities. All these observations are used to present a model that may account for the described associations between the presence or loss of these markers and the outcome of disease. Finally, their potential clinical applications as tumor-associated markers or as targets of immunotherapy are reviewed.
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Affiliation(s)
- J Le Pendu
- INSERM U419, Institute of Biology, Nantes, France.
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Clément M. [In the line of sight of court hearings reviewing involuntary confinement: mental state and dangerousness.]. Sante Ment Que 2001; 26:181-201. [PMID: 18253599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
This article presents results following the observation of six court hearings of the Tribunal administratif du Québec reviewing involuntary confinement. All 6 hearings concerned individuals considered dangerous. Through thematic analysis of testimonies and interrogations of various people involved (psychiatrist, prosecutor, defence attorney, expert psychiatrist), the author examines signs and points of reference used by those involved to decide on the dangerousness of a psychiatric patient. The results reveal that there is no objective criteria emerging from the hearings and that the way to define the dangerousness of an individual is abstract as well as vague. In fact, it is only in the written decision following hearings one sees the first comments related to dangerousness. The hearing stages psychiatry's and the law's protagonists who discuss among themselves not the issue of dangerousness but rather the implicitness of compulsory treatment the person must share with them. In the written decision, this is what emerges of this discourse which appears to be translated in terms of dangerousness.
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Dupuis JM, Vivant JF, Daudet G, Bouvet A, Clément M, Dazord A, Dumet N, David M, Bellon G. [Personal sports training in the management of obese boys aged 12 to 16 years]. Arch Pediatr 2000; 7:1185-93. [PMID: 11109945 DOI: 10.1016/s0929-693x(00)00128-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Estimation of both physical and psychological effects of an adapted physical training on children undergoing an obesity treatment. MATERIAL AND METHODS The survey was carried out on 36 obese boys (ages = 12-16 years) who stayed in the medical center for at least four months. Eighteen of them were trained with the SELF method (the SELF-training is global, progressive, adapted to each boy, controlled and takes place within a ten-week period with five sessions a fortnight, each session lasting 30 to 40 minutes). The parameters that were studied concerned auxology, breathing function exploration, aerobic and anaerobic capacities, muscle strength and psychomotor qualities; the subjective effects of the training were estimated with a questionnaire about life quality, and the hand test. At inclusion the results were reported to a standard kind of population. At the end of the training the results of the 18 boys that were trained were compared to those of the 18 controls. RESULTS Compared to a standard population, the obese children' aerobic capacity is diminished for the maximum power but is identical in absolute value for the VO2 max; their anaerobic capacities, muscle strength and psychomotor capacities are lower and their psyche is affected by the disease. After a three-month training period and after comparison with the 'control' group, there can be noticed a significant improvement in the psychomotor capacities, a major tendency for the improvement of the aerobic capacities and very positive effects on the psyche. CONCLUSION SELF-training in association with dietetics appears to be very useful in the therapeutic care of obese children. For the follow-up at home it would need to be registered within the domain of physiotherapy.
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Affiliation(s)
- J M Dupuis
- Unité médecine du sport, service de pédiatrie, centre hospitalier Lyon-Sud, France
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