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Sánchez-Montalvo A, Lecocq M, Bouillet E, Steelant B, Gohy S, Froidure A, Bullens D, Pilette C, Hox V. Validation and shortcomings of the most common mouse model of chronic rhinosinusitis with nasal polyps. Rhinology 2024; 0:3167. [PMID: 38497676 DOI: 10.4193/rhin23.331] [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: 03/19/2024]
Abstract
BACKGROUND Chronic rhinosinusitis (CRS) is a highly prevalent airway disease worldwide. Whereas eosinophilic CRS with nasal polyps (eCRSwNP) represents its most severe phenotype, pathogenic mechanisms remain poorly understood despite a wide spectrum of in vitro and in vivo experimental models. A mouse model of experimental ovalbumin (OVA)-induced airway allergy with coadministration of Staphylococcus aureus enterotoxin B (SEB) has been widely used to study eosinophilic eCRSwNP. This study revisits the features of this model and its suitability for studying eCRS. METHODOLOGY We implemented the most used eCRSwNP mouse model based on OVA+SEB intranasal challenges. Readouts including inflammatory features by (immuno)histology of the sinonasal epithelium (NP formation, eosinophils, epithelial and basement membrane thickness, fibrosis, goblet cells, Charcot-Leyden crystals (CLC)-like, tight junctions) and IgE production by enzyme-linked immunosorbent assay (ELISA), were compared to features of the corresponding human disease. RESULTS The OVA+SEB model induced eosinophilic inflammation of upper and lower airways, with epithelial and basement membrane thickening, goblet cell hyperplasia and subepithelial fibrosis in the sinuses, along increased IgE production. Except local IgE in nasal lavage (NL), which was only increased in OVA+SEB group, all other features did not differ between OVA and OVA+SEB groups. Macro- or microscopic NP were not detected. CONCLUSIONS With the notable exception of local IgE production, the addition of SEB did not induce additional inflammatory or structural change in the sinuses from mice exposed to and challenged with OVA. This model might represent a model for severe upper airway allergy rather than a specific model of human eCRSwNP.
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Affiliation(s)
- A Sánchez-Montalvo
- Pole of Pneumology, ORL (airways) and Dermatology (skin) (LUNS), Institute of Experimental and Clinical Research (IREC), Université Catholique de Louvain (UCLouvain), Brussels, Belgium
- Department of Microbiology, Immunology and Transplantation, Allergy and Clinical Immunology Research Group, KULeuven, Leuven, Belgium
| | - M Lecocq
- Pole of Pneumology, ORL (airways) and Dermatology (skin) (LUNS), Institute of Experimental and Clinical Research (IREC), Université Catholique de Louvain (UCLouvain), Brussels, Belgium
| | - E Bouillet
- Pole of Pneumology, ORL (airways) and Dermatology (skin) (LUNS), Institute of Experimental and Clinical Research (IREC), Université Catholique de Louvain (UCLouvain), Brussels, Belgium
| | - B Steelant
- Department of Microbiology, Immunology and Transplantation, Allergy and Clinical Immunology Research Group, KULeuven, Leuven, Belgium
| | - S Gohy
- Pole of Pneumology, ORL (airways) and Dermatology (skin) (LUNS), Institute of Experimental and Clinical Research (IREC), Université Catholique de Louvain (UCLouvain), Brussels, Belgium
- Department of Pneumology, Cliniques Universitaires Saint-Luc, Brussels, Belgium
- Cystic Fibrosis Reference Centre, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - A Froidure
- Pole of Pneumology, ORL (airways) and Dermatology (skin) (LUNS), Institute of Experimental and Clinical Research (IREC), Université Catholique de Louvain (UCLouvain), Brussels, Belgium
- Department of Pneumology, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - D Bullens
- Department of Microbiology, Immunology and Transplantation, Allergy and Clinical Immunology Research Group, KULeuven, Leuven, Belgium
- Clinical Division of Paediatrics, UZ Leuven, Leuven, Belgium
| | - C Pilette
- Pole of Pneumology, ORL (airways) and Dermatology (skin) (LUNS), Institute of Experimental and Clinical Research (IREC), Université Catholique de Louvain (UCLouvain), Brussels, Belgium
- Department of Pneumology, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - V Hox
- Pole of Pneumology, ORL (airways) and Dermatology (skin) (LUNS), Institute of Experimental and Clinical Research (IREC), Université Catholique de Louvain (UCLouvain), Brussels, Belgium
- Department of Otorhinolaryngology, Cliniques Universitaires Saint-Luc, Brussels, Belgium
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2
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Mapunda JA, Pareja J, Vladymyrov M, Bouillet E, Hélie P, Pleskač P, Barcos S, Andrae J, Vestweber D, McDonald DM, Betsholtz C, Deutsch U, Proulx ST, Engelhardt B. VE-cadherin in arachnoid and pia mater cells serves as a suitable landmark for in vivo imaging of CNS immune surveillance and inflammation. Nat Commun 2023; 14:5837. [PMID: 37730744 PMCID: PMC10511632 DOI: 10.1038/s41467-023-41580-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [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: 10/04/2022] [Accepted: 09/01/2023] [Indexed: 09/22/2023] Open
Abstract
Meninges cover the surface of the brain and spinal cord and contribute to protection and immune surveillance of the central nervous system (CNS). How the meningeal layers establish CNS compartments with different accessibility to immune cells and immune mediators is, however, not well understood. Here, using 2-photon imaging in female transgenic reporter mice, we describe VE-cadherin at intercellular junctions of arachnoid and pia mater cells that form the leptomeninges and border the subarachnoid space (SAS) filled with cerebrospinal fluid (CSF). VE-cadherin expression also marked a layer of Prox1+ cells located within the arachnoid beneath and separate from E-cadherin+ arachnoid barrier cells. In vivo imaging of the spinal cord and brain in female VE-cadherin-GFP reporter mice allowed for direct observation of accessibility of CSF derived tracers and T cells into the SAS bordered by the arachnoid and pia mater during health and neuroinflammation, and detection of volume changes of the SAS during CNS pathology. Together, the findings identified VE-cadherin as an informative landmark for in vivo imaging of the leptomeninges that can be used to visualize the borders of the SAS and thus potential barrier properties of the leptomeninges in controlling access of immune mediators and immune cells into the CNS during health and neuroinflammation.
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Affiliation(s)
| | - Javier Pareja
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | | | - Elisa Bouillet
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | - Pauline Hélie
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | - Petr Pleskač
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | - Sara Barcos
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | - Johanna Andrae
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | | | - Donald M McDonald
- Cardiovascular Research Institute, UCSF Helen Diller Family Comprehensive Cancer Center, and Department of Anatomy, University of California San Francisco, San Francisco, CA, USA
| | - Christer Betsholtz
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
- Department of Medicine-Huddinge, Karolinska Institute, Campus Flemingsberg, Huddinge, Sweden
| | - Urban Deutsch
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | - Steven T Proulx
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
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3
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Aydin S, Pareja J, Schallenberg VM, Klopstein A, Gruber T, Page N, Bouillet E, Blanchard N, Liblau R, Körbelin J, Schwaninger M, Johnson AJ, Schenk M, Deutsch U, Merkler D, Engelhardt B. Antigen recognition detains CD8 + T cells at the blood-brain barrier and contributes to its breakdown. Nat Commun 2023; 14:3106. [PMID: 37253744 PMCID: PMC10229608 DOI: 10.1038/s41467-023-38703-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [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: 01/07/2023] [Accepted: 05/09/2023] [Indexed: 06/01/2023] Open
Abstract
Blood-brain barrier (BBB) breakdown and immune cell infiltration into the central nervous system (CNS) are early hallmarks of multiple sclerosis (MS). High numbers of CD8+ T cells are found in MS lesions, and antigen (Ag) presentation at the BBB has been proposed to promote CD8+ T cell entry into the CNS. Here, we show that brain endothelial cells process and cross-present Ag, leading to effector CD8+ T cell differentiation. Under physiological flow in vitro, endothelial Ag presentation prevented CD8+ T cell crawling and diapedesis resulting in brain endothelial cell apoptosis and BBB breakdown. Brain endothelial Ag presentation in vivo was limited due to Ag uptake by CNS-resident macrophages but still reduced motility of Ag-specific CD8+ T cells within CNS microvessels. MHC class I-restricted Ag presentation at the BBB during neuroinflammation thus prohibits CD8+ T cell entry into the CNS and triggers CD8+ T cell-mediated focal BBB breakdown.
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Affiliation(s)
- Sidar Aydin
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | - Javier Pareja
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | | | | | - Thomas Gruber
- Institute of Pathology, Experimental Pathology, University of Bern, Bern, Switzerland
| | - Nicolas Page
- Department of Pathology and Immunology, Division of Clinical Pathology, University and University Hospitals of Geneva, Geneva, Switzerland
| | - Elisa Bouillet
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | - Nicolas Blanchard
- Toulouse Institute for infectious and inflammatory diseases, University of Toulouse, CNRS, INSERM, UPS, Toulouse, France
| | - Roland Liblau
- Toulouse Institute for infectious and inflammatory diseases, University of Toulouse, CNRS, INSERM, UPS, Toulouse, France
| | - Jakob Körbelin
- Department of Oncology, Hematology and Bone Marrow Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Markus Schwaninger
- Institute for Experimental and Clinical Pharmacology and Toxicology, Center of Brain, Behavior and Metabolism, University of Lübeck, Lübeck, Germany
| | - Aaron J Johnson
- Mayo Clinic Graduate School of Biomedical Sciences, College of Medicine, Mayo Clinic, Rochester, MN, USA
| | - Mirjam Schenk
- Institute of Pathology, Experimental Pathology, University of Bern, Bern, Switzerland
| | - Urban Deutsch
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | - Doron Merkler
- Department of Pathology and Immunology, Division of Clinical Pathology, University and University Hospitals of Geneva, Geneva, Switzerland
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Ivan DC, Berve KC, Walthert S, Monaco G, Borst K, Bouillet E, Ferreira F, Lee H, Steudler J, Buch T, Prinz M, Engelhardt B, Locatelli G. Insulin-like growth factor-1 receptor controls the function of CNS-resident macrophages and their contribution to neuroinflammation. Acta Neuropathol Commun 2023; 11:35. [PMID: 36890580 PMCID: PMC9993619 DOI: 10.1186/s40478-023-01535-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 02/20/2023] [Indexed: 03/10/2023] Open
Abstract
Signaling by insulin-like growth factor-1 (IGF-1) is essential for the development of the central nervous system (CNS) and regulates neuronal survival and myelination in the adult CNS. In neuroinflammatory conditions including multiple sclerosis (MS) and its animal model experimental autoimmune encephalomyelitis (EAE), IGF-1 can regulate cellular survival and activation in a context-dependent and cell-specific manner. Notwithstanding its importance, the functional outcome of IGF-1 signaling in microglia/macrophages, which maintain CNS homeostasis and regulate neuroinflammation, remains undefined. As a result, contradictory reports on the disease-ameliorating efficacy of IGF-1 are difficult to interpret, together precluding its potential use as a therapeutic agent. To fill this gap, we here investigated the role of IGF-1 signaling in CNS-resident microglia and border associated macrophages (BAMs) by conditional genetic deletion of the receptor Igf1r in these cell types. Using a series of techniques including histology, bulk RNA sequencing, flow cytometry and intravital imaging, we show that absence of IGF-1R significantly impacted the morphology of both BAMs and microglia. RNA analysis revealed minor changes in microglia. In BAMs however, we detected an upregulation of functional pathways associated with cellular activation and a decreased expression of adhesion molecules. Notably, genetic deletion of Igf1r from CNS-resident macrophages led to a significant weight gain in mice, suggesting that absence of IGF-1R from CNS-resident myeloid cells indirectly impacts the somatotropic axis. Lastly, we observed a more severe EAE disease course upon Igf1r genetic ablation, thus highlighting an important immunomodulatory role of this signaling pathway in BAMs/microglia. Taken together, our work shows that IGF-1R signaling in CNS-resident macrophages regulates the morphology and transcriptome of these cells while significantly decreasing the severity of autoimmune CNS inflammation.
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Affiliation(s)
- Daniela C Ivan
- Theodor Kocher Institute, University of Bern, Freiestrasse 1, CH-3012, Bern, Switzerland
| | - Kristina Carolin Berve
- Theodor Kocher Institute, University of Bern, Freiestrasse 1, CH-3012, Bern, Switzerland
| | - Sabrina Walthert
- Theodor Kocher Institute, University of Bern, Freiestrasse 1, CH-3012, Bern, Switzerland
| | - Gianni Monaco
- Institute of Neuropathology, University of Freiburg, Freiburg, Germany
| | - Katharina Borst
- Institute of Neuropathology, University of Freiburg, Freiburg, Germany
| | - Elisa Bouillet
- Theodor Kocher Institute, University of Bern, Freiestrasse 1, CH-3012, Bern, Switzerland
| | - Filipa Ferreira
- Institute of Laboratory Animal Science, University of Zurich, Zurich, Switzerland
| | - Henry Lee
- Theodor Kocher Institute, University of Bern, Freiestrasse 1, CH-3012, Bern, Switzerland
| | - Jasmin Steudler
- Theodor Kocher Institute, University of Bern, Freiestrasse 1, CH-3012, Bern, Switzerland
| | - Thorsten Buch
- Institute of Laboratory Animal Science, University of Zurich, Zurich, Switzerland
| | - Marco Prinz
- Institute of Neuropathology, University of Freiburg, Freiburg, Germany.,Center for Basics in NeuroModulation (NeuroModulBasics), Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
| | - Britta Engelhardt
- Theodor Kocher Institute, University of Bern, Freiestrasse 1, CH-3012, Bern, Switzerland
| | - Giuseppe Locatelli
- Theodor Kocher Institute, University of Bern, Freiestrasse 1, CH-3012, Bern, Switzerland.
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5
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Steudler J, Ecott T, Ivan DC, Bouillet E, Walthert S, Berve K, Dick TP, Engelhardt B, Locatelli G. Autoimmune neuroinflammation triggers mitochondrial oxidation in oligodendrocytes. Glia 2022; 70:2045-2061. [PMID: 35762739 PMCID: PMC9546135 DOI: 10.1002/glia.24235] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 06/04/2022] [Accepted: 06/16/2022] [Indexed: 11/06/2022]
Abstract
Oligodendrocytes (ODCs) are myelinating cells of the central nervous system (CNS) supporting neuronal survival. Oxidants and mitochondrial dysfunction have been suggested as the main causes of ODC damage during neuroinflammation as observed in multiple sclerosis (MS). Nonetheless, the dynamics of this process remain unclear, thus hindering the design of neuroprotective therapeutic strategies. To decipher the spatio-temporal pattern of oxidative damage and dysfunction of ODC mitochondria in vivo, we created a novel mouse model in which ODCs selectively express the ratiometric H2 O2 biosensor mito-roGFP2-Orp1 allowing for quantification of redox changes in their mitochondria. Using 2-photon imaging of the exposed spinal cord, we observed significant mitochondrial oxidation in ODCs upon induction of the MS model experimental autoimmune encephalomyelitis (EAE). This redox change became already apparent during the preclinical phase of EAE prior to CNS infiltration of inflammatory cells. Upon clinical EAE development, mitochondria oxidation remained detectable and was associated with a significant impairment in organelle density and morphology. These alterations correlated with the proximity of ODCs to inflammatory lesions containing activated microglia/macrophages. During the chronic progression of EAE, ODC mitochondria maintained an altered morphology, but their oxidant levels decreased to levels observed in healthy mice. Taken together, our study implicates oxidative stress in ODC mitochondria as a novel pre-clinical sign of MS-like inflammation and demonstrates that evolving redox and morphological changes in mitochondria accompany ODC dysfunction during neuroinflammation.
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Affiliation(s)
- Jasmin Steudler
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | - Timothy Ecott
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | - Daniela C Ivan
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | - Elisa Bouillet
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | | | - Kristina Berve
- Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | - Tobias P Dick
- Division of Redox Regulation, DKFZ-ZMBH Alliance, German Cancer Research Center (DKFZ), Heidelberg, Germany
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6
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Cerny D, Sartori C, Rimoldi SF, Meister T, Soria R, Bouillet E, Scherrer U, Rexhaj E. Assisted Reproductive Technologies Predispose to Insulin Resistance and Obesity in Male Mice Challenged With a High-Fat Diet. Endocrinology 2017; 158:1152-1159. [PMID: 28323978 DOI: 10.1210/en.2016-1475] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 02/03/2017] [Indexed: 11/19/2022]
Abstract
Assisted reproductive technology (ART) alters glucose homeostasis in mice and humans, but the underlying mechanisms are incompletely understood. ART induces endothelial dysfunction and arterial hypertension by epigenetic alteration of the endothelial nitric oxide synthase (eNOS) gene. In eNOS-deficient mice, insulin resistance is related to impaired insulin stimulation of muscle blood flow and substrate delivery and defective intrinsic skeletal muscle glucose uptake. We therefore assessed glucose tolerance, insulin sensitivity (euglycemic clamp), insulin stimulation of muscle blood flow in vivo, and muscle glucose uptake in vitro in male ART and control mice fed a normal chow (NC) or challenged with a high-fat diet (HFD) during 8 weeks. Glucose tolerance and insulin sensitivity were similar in NC-fed animals. When challenged with a HFD, however, ART mice developed exaggerated obesity, fasting hyperinsulinemia and hyperglycemia, and a 20% lower insulin-stimulated glucose utilization than did control mice (steady-state glucose infusion rate (GIR), 51.3 ± 7.3 vs 64.0 ± 10.8 mg/kg/min, P = 0.012). ART-induced insulin resistance was associated with defective insulin stimulation of muscle blood flow, whereas intrinsic skeletal muscle glucose uptake was normal. In conclusion, ART-induced endothelial dysfunction, when challenged with a metabolic stress, facilitates glucose intolerance and insulin resistance. Similar mechanisms may contribute to ART-induced alterations of the metabolic phenotype in humans.
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Affiliation(s)
- David Cerny
- Departments of Cardiology
- Clinical Research, University Hospital Bern, 3010 Bern, Switzerland
| | - Claudio Sartori
- Departments of Cardiology
- Clinical Research, University Hospital Bern, 3010 Bern, Switzerland
- Department of Internal Medicine, University Hospital, 1011 Lausanne, Switzerland
| | - Stefano F Rimoldi
- Departments of Cardiology
- Clinical Research, University Hospital Bern, 3010 Bern, Switzerland
| | - Théo Meister
- Departments of Cardiology
- Clinical Research, University Hospital Bern, 3010 Bern, Switzerland
| | - Rodrigo Soria
- Departments of Cardiology
- Clinical Research, University Hospital Bern, 3010 Bern, Switzerland
| | - Elisa Bouillet
- Departments of Cardiology
- Clinical Research, University Hospital Bern, 3010 Bern, Switzerland
| | - Urs Scherrer
- Departments of Cardiology
- Clinical Research, University Hospital Bern, 3010 Bern, Switzerland
- Facultad de Ciencias, Departamento de Biología, Universidad de Tarapacá, 1775 Arica, Chile
| | - Emrush Rexhaj
- Departments of Cardiology
- Clinical Research, University Hospital Bern, 3010 Bern, Switzerland
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7
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Deisl C, Anderegg M, Albano G, Lüscher BP, Cerny D, Soria R, Bouillet E, Rimoldi S, Scherrer U, Fuster DG. Loss of Sodium/Hydrogen Exchanger NHA2 Exacerbates Obesity- and Aging-Induced Glucose Intolerance in Mice. PLoS One 2016; 11:e0163568. [PMID: 27685945 PMCID: PMC5042380 DOI: 10.1371/journal.pone.0163568] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 09/11/2016] [Indexed: 11/21/2022] Open
Abstract
We previously demonstrated that the sodium/hydrogen exchanger NHA2, also known as NHEDC2 or SLC9B2, is critical for insulin secretion by β–cells. To gain more insights into the role of NHA2 on systemic glucose homeostasis, we studied the impact of loss of NHA2 during the physiological aging process and in the setting of diet-induced obesity. While glucose tolerance was normal at 2 months of age, NHA2 KO mice displayed a significant glucose intolerance at 5 and 12 months of age, respectively. An obesogenic high fat diet further exacerbated the glucose intolerance of NHA2 KO mice. Insulin levels remained similar in NHA2 KO and WT mice during aging and high fat diet, but fasting insulin/glucose ratios were significantly lower in NHA2 KO mice. Peripheral insulin sensitivity, measured by insulin tolerance tests and hyperinsulinemic euglycemic clamps, was unaffected by loss of NHA2 during aging and high fat diet. High fat diet diminished insulin secretion capacity in both WT and NHA2 KO islets and reduced expression of NHA2 in WT islets. In contrast, aging was characterized by a gradual increase of NHA2 expression in islets, paralleled by an increasing difference in insulin secretion between WT and NHA2 KO islets. In summary, our results demonstrate that loss of the sodium/hydrogen exchanger NHA2 exacerbates obesity- and aging-induced glucose intolerance in mice. Furthermore, our data reveal a close link between NHA2 expression and insulin secretion capacity in islets.
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Affiliation(s)
- Christine Deisl
- Division of Nephrology, Hypertension and Clinical Pharmacology, Bern University Hospital, University of Bern, Bern, Switzerland
- Institute of Biochemistry and Molecular Medicine and Swiss National Centre of Competence in Research (NCCR) TransCure, University of Bern, Bern, Switzerland
- Department of Clinical Research, Bern University Hospital, University of Bern, Bern Switzerland
| | - Manuel Anderegg
- Division of Nephrology, Hypertension and Clinical Pharmacology, Bern University Hospital, University of Bern, Bern, Switzerland
- Institute of Biochemistry and Molecular Medicine and Swiss National Centre of Competence in Research (NCCR) TransCure, University of Bern, Bern, Switzerland
- Department of Clinical Research, Bern University Hospital, University of Bern, Bern Switzerland
| | - Giuseppe Albano
- Division of Nephrology, Hypertension and Clinical Pharmacology, Bern University Hospital, University of Bern, Bern, Switzerland
- Institute of Biochemistry and Molecular Medicine and Swiss National Centre of Competence in Research (NCCR) TransCure, University of Bern, Bern, Switzerland
- Department of Clinical Research, Bern University Hospital, University of Bern, Bern Switzerland
| | - Benjamin P. Lüscher
- Institute of Biochemistry and Molecular Medicine and Swiss National Centre of Competence in Research (NCCR) TransCure, University of Bern, Bern, Switzerland
- Department of Clinical Research, Bern University Hospital, University of Bern, Bern Switzerland
| | - David Cerny
- Department of Clinical Research, Bern University Hospital, University of Bern, Bern Switzerland
- Division of Cardiology, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Rodrigo Soria
- Department of Clinical Research, Bern University Hospital, University of Bern, Bern Switzerland
- Division of Cardiology, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Elisa Bouillet
- Department of Clinical Research, Bern University Hospital, University of Bern, Bern Switzerland
- Division of Cardiology, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Stefano Rimoldi
- Department of Clinical Research, Bern University Hospital, University of Bern, Bern Switzerland
- Division of Cardiology, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Urs Scherrer
- Department of Clinical Research, Bern University Hospital, University of Bern, Bern Switzerland
- Division of Cardiology, Bern University Hospital, University of Bern, Bern, Switzerland
- Facultad de Ciencias, Departamento de Biologia, Universidad de Tarapaca, Arica, Chile
| | - Daniel G. Fuster
- Division of Nephrology, Hypertension and Clinical Pharmacology, Bern University Hospital, University of Bern, Bern, Switzerland
- Institute of Biochemistry and Molecular Medicine and Swiss National Centre of Competence in Research (NCCR) TransCure, University of Bern, Bern, Switzerland
- Department of Clinical Research, Bern University Hospital, University of Bern, Bern Switzerland
- * E-mail:
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8
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Rexhaj E, Arx R, Cerny D, Soria R, Bouillet E, Sartori C, Scherrer U, Rimoldi S. Assisted Reproductive Technologies‐Induced Premature Vascular Ageing Persists and Evolves into Arterial Hypertension in Adolescents. FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.957.9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Robert Arx
- Cardiology University HospitalBernSwitzerland
| | - David Cerny
- Cardiology University HospitalBernSwitzerland
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9
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Cerny D, Rexhaj E, Bouillet E, Soria R, Meister T, Villena M, Sartori C, Allemann Y, Scherrer U, Rimoldi S. Sustained Hypoxic Pulmonary Hypertension and Systemic Vascular Dysfunction in High‐Altitude Dwellers Prone to Re‐Entry High Altitude Pulmonary Edema, Improvement by Anti‐Oxidants. FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.1051.6] [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: 11/11/2022]
Affiliation(s)
- David Cerny
- Cardiology University HospitalBernSwitzerland
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10
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Cerny D, Rexhaj E, Bouillet E, Soria R, Sartori C, Allemann Y, Rimoldi S, Scherrer U. Vascular dysfunction, arterial hypertension and insulin‐resistance in offspring of a mouse model of preeclampsia: prevention by sildenafil (1085.8). FASEB J 2014. [DOI: 10.1096/fasebj.28.1_supplement.1085.8] [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: 11/11/2022]
Affiliation(s)
- David Cerny
- Cardiology University Hospital Berne BerneSwitzerland
| | - Emrush Rexhaj
- Cardiology University Hospital Berne BerneSwitzerland
| | | | - Rodrigo Soria
- Cardiology University Hospital Berne BerneSwitzerland
| | | | - Yves Allemann
- Cardiology University Hospital Berne BerneSwitzerland
| | | | - Urs Scherrer
- Cardiology University Hospital Berne BerneSwitzerland
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11
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Rexhaj E, Paoloni-Giacobino A, Rimoldi SF, Fuster DG, Anderegg M, Somm E, Bouillet E, Allemann Y, Sartori C, Scherrer U. Mice generated by in vitro fertilization exhibit vascular dysfunction and shortened life span. J Clin Invest 2013; 123:5052-60. [PMID: 24270419 PMCID: PMC3859389 DOI: 10.1172/jci68943] [Citation(s) in RCA: 134] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Accepted: 09/04/2013] [Indexed: 12/11/2022] Open
Abstract
Children conceived by assisted reproductive technologies (ART) display a level of vascular dysfunction similar to that seen in children of mothers with preeclamspia. The long-term consequences of ART-associated vascular disorders are unknown and difficult to investigate in healthy children. Here, we found that vasculature from mice generated by ART display endothelial dysfunction and increased stiffness, which translated into arterial hypertension in vivo. Progeny of male ART mice also exhibited vascular dysfunction, suggesting underlying epigenetic modifications. ART mice had altered methylation at the promoter of the gene encoding eNOS in the aorta, which correlated with decreased vascular eNOS expression and NO synthesis. Administration of a deacetylase inhibitor to ART mice normalized vascular gene methylation and function and resulted in progeny without vascular dysfunction. The induction of ART-associated vascular and epigenetic alterations appeared to be related to the embryo environment; these alterations were possibly facilitated by the hormonally stimulated ovulation accompanying ART. Finally, ART mice challenged with a high-fat diet had roughly a 25% shorter life span compared with control animals. This study highlights the potential of ART to induce vascular dysfunction and shorten life span and suggests that epigenetic alterations contribute to these problems.
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Affiliation(s)
- Emrush Rexhaj
- Swiss Cardiovascular Center Bern and Department of Clinical Research, University Hospital, Bern, Switzerland.
Department of Genetic and Laboratory Medicine and Swiss Center for Applied Human Toxicology, Geneva University Hospital, Geneva, Switzerland.
Division of Nephrology, Hypertension and Clinical Pharmacology, University Hospital, Bern, Switzerland.
Division of Development and Growth, Department of Paediatrics, University of Geneva Medical School, Geneva, Switzerland.
Department of Internal Medicine, CHUV, Lausanne, Switzerland.
Facultad de Ciencias, Departamento de Biología, Universidad de Tarapacá, Arica, Chile
| | - Ariane Paoloni-Giacobino
- Swiss Cardiovascular Center Bern and Department of Clinical Research, University Hospital, Bern, Switzerland.
Department of Genetic and Laboratory Medicine and Swiss Center for Applied Human Toxicology, Geneva University Hospital, Geneva, Switzerland.
Division of Nephrology, Hypertension and Clinical Pharmacology, University Hospital, Bern, Switzerland.
Division of Development and Growth, Department of Paediatrics, University of Geneva Medical School, Geneva, Switzerland.
Department of Internal Medicine, CHUV, Lausanne, Switzerland.
Facultad de Ciencias, Departamento de Biología, Universidad de Tarapacá, Arica, Chile
| | - Stefano F. Rimoldi
- Swiss Cardiovascular Center Bern and Department of Clinical Research, University Hospital, Bern, Switzerland.
Department of Genetic and Laboratory Medicine and Swiss Center for Applied Human Toxicology, Geneva University Hospital, Geneva, Switzerland.
Division of Nephrology, Hypertension and Clinical Pharmacology, University Hospital, Bern, Switzerland.
Division of Development and Growth, Department of Paediatrics, University of Geneva Medical School, Geneva, Switzerland.
Department of Internal Medicine, CHUV, Lausanne, Switzerland.
Facultad de Ciencias, Departamento de Biología, Universidad de Tarapacá, Arica, Chile
| | - Daniel G. Fuster
- Swiss Cardiovascular Center Bern and Department of Clinical Research, University Hospital, Bern, Switzerland.
Department of Genetic and Laboratory Medicine and Swiss Center for Applied Human Toxicology, Geneva University Hospital, Geneva, Switzerland.
Division of Nephrology, Hypertension and Clinical Pharmacology, University Hospital, Bern, Switzerland.
Division of Development and Growth, Department of Paediatrics, University of Geneva Medical School, Geneva, Switzerland.
Department of Internal Medicine, CHUV, Lausanne, Switzerland.
Facultad de Ciencias, Departamento de Biología, Universidad de Tarapacá, Arica, Chile
| | - Manuel Anderegg
- Swiss Cardiovascular Center Bern and Department of Clinical Research, University Hospital, Bern, Switzerland.
Department of Genetic and Laboratory Medicine and Swiss Center for Applied Human Toxicology, Geneva University Hospital, Geneva, Switzerland.
Division of Nephrology, Hypertension and Clinical Pharmacology, University Hospital, Bern, Switzerland.
Division of Development and Growth, Department of Paediatrics, University of Geneva Medical School, Geneva, Switzerland.
Department of Internal Medicine, CHUV, Lausanne, Switzerland.
Facultad de Ciencias, Departamento de Biología, Universidad de Tarapacá, Arica, Chile
| | - Emmanuel Somm
- Swiss Cardiovascular Center Bern and Department of Clinical Research, University Hospital, Bern, Switzerland.
Department of Genetic and Laboratory Medicine and Swiss Center for Applied Human Toxicology, Geneva University Hospital, Geneva, Switzerland.
Division of Nephrology, Hypertension and Clinical Pharmacology, University Hospital, Bern, Switzerland.
Division of Development and Growth, Department of Paediatrics, University of Geneva Medical School, Geneva, Switzerland.
Department of Internal Medicine, CHUV, Lausanne, Switzerland.
Facultad de Ciencias, Departamento de Biología, Universidad de Tarapacá, Arica, Chile
| | - Elisa Bouillet
- Swiss Cardiovascular Center Bern and Department of Clinical Research, University Hospital, Bern, Switzerland.
Department of Genetic and Laboratory Medicine and Swiss Center for Applied Human Toxicology, Geneva University Hospital, Geneva, Switzerland.
Division of Nephrology, Hypertension and Clinical Pharmacology, University Hospital, Bern, Switzerland.
Division of Development and Growth, Department of Paediatrics, University of Geneva Medical School, Geneva, Switzerland.
Department of Internal Medicine, CHUV, Lausanne, Switzerland.
Facultad de Ciencias, Departamento de Biología, Universidad de Tarapacá, Arica, Chile
| | - Yves Allemann
- Swiss Cardiovascular Center Bern and Department of Clinical Research, University Hospital, Bern, Switzerland.
Department of Genetic and Laboratory Medicine and Swiss Center for Applied Human Toxicology, Geneva University Hospital, Geneva, Switzerland.
Division of Nephrology, Hypertension and Clinical Pharmacology, University Hospital, Bern, Switzerland.
Division of Development and Growth, Department of Paediatrics, University of Geneva Medical School, Geneva, Switzerland.
Department of Internal Medicine, CHUV, Lausanne, Switzerland.
Facultad de Ciencias, Departamento de Biología, Universidad de Tarapacá, Arica, Chile
| | - Claudio Sartori
- Swiss Cardiovascular Center Bern and Department of Clinical Research, University Hospital, Bern, Switzerland.
Department of Genetic and Laboratory Medicine and Swiss Center for Applied Human Toxicology, Geneva University Hospital, Geneva, Switzerland.
Division of Nephrology, Hypertension and Clinical Pharmacology, University Hospital, Bern, Switzerland.
Division of Development and Growth, Department of Paediatrics, University of Geneva Medical School, Geneva, Switzerland.
Department of Internal Medicine, CHUV, Lausanne, Switzerland.
Facultad de Ciencias, Departamento de Biología, Universidad de Tarapacá, Arica, Chile
| | - Urs Scherrer
- Swiss Cardiovascular Center Bern and Department of Clinical Research, University Hospital, Bern, Switzerland.
Department of Genetic and Laboratory Medicine and Swiss Center for Applied Human Toxicology, Geneva University Hospital, Geneva, Switzerland.
Division of Nephrology, Hypertension and Clinical Pharmacology, University Hospital, Bern, Switzerland.
Division of Development and Growth, Department of Paediatrics, University of Geneva Medical School, Geneva, Switzerland.
Department of Internal Medicine, CHUV, Lausanne, Switzerland.
Facultad de Ciencias, Departamento de Biología, Universidad de Tarapacá, Arica, Chile
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Rexhaj E, Rimoldi S, Pireva A, Brenner R, Bouillet E, Sartori C, Allemann Y, Scherrer U. Restrictive diet during pregnancy‐induced vascular dysfunction and hypertension in mice is associated with insulin resistance. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.1187.5] [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: 11/11/2022]
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13
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Grisouard J, Timper K, Bouillet E, Radimerski T, Dembinski K, Frey DM, Peterli R, Zulewski H, Keller U, Müller B, Christ-Crain M. Metformin counters both lipolytic/inflammatory agents-decreased hormone sensitive lipase phosphorylation at Ser-554 and -induced lipolysis in human adipocytes. Arch Physiol Biochem 2011; 117:209-14. [PMID: 21338323 DOI: 10.3109/13813455.2010.550925] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
OBJECTIVE To study the effects of metformin on lipolysis and hormone sensitive lipase (HSL) phosphorylation in human adipocytes treated with lipolytic and inflammatory agents. METHODS Lipolysis and phosphorylation status of HSL were assessed in subcutaneous pre-adipocytes surgically isolated from patients and differentiated into mature adipocytes in vitro. RESULTS Stimulation for 1 h with forskolin, isoproterenol and IBMX or stimulation for 24 h with LPS, IL-1β and TNF-α increased lipolysis (p < 0.05 vs. basal). The phosphorylation of HSL at Ser-554 was decreased while the Ser-552 phosphorylation was increased. Pre-incubation with metformin (24 h, 1 mM) inhibited forskolin-, isoproterenol-, IBMX-, LPS-, IL-1β- and TNF-α-induced glycerol release and prevented p(Ser554)HSL decrease and p(Ser-552)HSL increase due to lipolytic and inflammatory agents. AMPKα1 is involved in metformin-induced HSL phosphorylation at Ser-552. CONCLUSION Phosphorylation of HSL at Ser-554 inversely correlates with lipolysis and HSL phosphorylation at Ser552 in human adipocytes.
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Affiliation(s)
- Jean Grisouard
- University Hospital Basel, Department of Biomedicine, Switzerlands.
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14
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Grisouard J, Bouillet E, Timper K, Radimerski T, Dembinski K, Frey DM, Peterli R, Zulewski H, Keller U, Müller B, Christ-Crain M. Both inflammatory and classical lipolytic pathways are involved in lipopolysaccharide-induced lipolysis in human adipocytes. Innate Immun 2010; 18:25-34. [DOI: 10.1177/1753425910386632] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
High fat diet-induced endotoxaemia triggers low-grade inflammation and lipid release from adipose tissue. This study aims to unravel the cellular mechanisms leading to the lipopolysaccharide (LPS) effects in human adipocytes. Subcutaneous pre-adipocytes surgically isolated from patients were differentiated into mature adipocytes in vitro. Lipolysis was assessed by measurement of glycerol release and mRNA expression of pro-inflammatory cytokines were evaluated by real-time PCR. Treatment with LPS for 24 h induced a dose-dependent increase in interleukin (IL)-6 and IL-8 mRNA expression. At 1 µg/ml LPS, IL-6 and IL-8 were induced to 19.5 ± 1.8-fold and 662.7 ± 91.5-fold ( P < 0.01 vs basal), respectively. From 100 ng/ml to 1 µg/ml, LPS-induced lipolysis increased to a plateau of 3.1-fold above basal level ( P < 0.001 vs basal). Co-treatment with inhibitors of inhibitory kappa B kinase kinase beta (IKKβ) or NF-κB inhibited LPS-induced glycerol release. Co-treatment with the protein kinase A (PKA) inhibitor H-89, the lipase inhibitor orlistat or the hormone-sensitive lipase (HSL) inhibitor CAY10499 abolished the lipolytic effects of LPS. Co-treatment with the MAPK inhibitor, U0126 also reduced LPS-induced glycerol release. Inhibition of lipolysis by orlistat or CAY10499 reduced LPS-induced IL-6 and IL-8 mRNA expression. Induction of lipolysis by the synthetic catecholamine isoproterenol or the phosphodiesterase type III inhibitor milrinone did not alter basal IL-6 and IL-8 mRNA expression after 24 treatments whereas these compounds enhanced LPS-induced IL-6 and IL-8 mRNA expression. Both the inflammatory IKKβ/NF-κB pathway and the lipolytic PKA/HSL pathways mediate LPS-induced lipolysis. In turn, LPS-induced lipolysis reinforces the expression of pro-inflammatory cytokines and, thereby, triggers its own lipolytic activity.
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Affiliation(s)
- Jean Grisouard
- Department of Biomedicine, Metabolism Group, University Hospital Basel, Basel, Switzerland
| | - Elisa Bouillet
- Department of Biomedicine, Metabolism Group, University Hospital Basel, Basel, Switzerland
| | - Katharina Timper
- Department of Biomedicine, Metabolism Group, University Hospital Basel, Basel, Switzerland
- Division of Endocrinology, Diabetes and Clinical Nutrition, University Hospital Basel, Basel, Switzerland
| | - Tanja Radimerski
- Department of Biomedicine, Metabolism Group, University Hospital Basel, Basel, Switzerland
| | - Kaethi Dembinski
- Department of Biomedicine, Metabolism Group, University Hospital Basel, Basel, Switzerland
| | - Daniel M Frey
- Department of Surgery, University Hospital Basel, Basel, Switzerland
| | - Ralph Peterli
- Department of Surgery, St Claraspital Basel, Basel, Switzerland
| | - Henryk Zulewski
- Department of Biomedicine, Metabolism Group, University Hospital Basel, Basel, Switzerland
- Division of Endocrinology, Diabetes and Clinical Nutrition, University Hospital Basel, Basel, Switzerland
| | - Ulrich Keller
- Department of Biomedicine, Metabolism Group, University Hospital Basel, Basel, Switzerland
- Division of Endocrinology, Diabetes and Clinical Nutrition, University Hospital Basel, Basel, Switzerland
| | - Beat Müller
- Department of Internal Medicine, Kantonsspital Aarau, Aarau, Switzerland
| | - Mirjam Christ-Crain
- Department of Biomedicine, Metabolism Group, University Hospital Basel, Basel, Switzerland
- Division of Endocrinology, Diabetes and Clinical Nutrition, University Hospital Basel, Basel, Switzerland
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15
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Morvan J, Carteron B, Laroche R, Bouillet E, Teyssou R, Blanchard de Vaucouleurs F. [A sero-epidemiologic survey of HIV infection in Burundi between 1980 and 1981]. Bull Soc Pathol Exot Filiales 1989; 82:130-40. [PMID: 2743516] [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] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A retrospective investigation permitted us to show presence of HIV infection in Burundi between 1980 and 1981. 658 sera collected in healthy population of Burundi during this period have been tested for HIV1 and HIV2 with ELISA screening and western-blot analysis. Results completed with HIV1 antigen research show 29 patients infected with HIV1 (27 antibodies to HIV1 carriers, and 2 with HIV1 antigen). The epidemiological situation before finding HIV show high prevalence (4.4%) of HIV1 infection. No HIV2 was found. The epidemiology of HIV infection was dominated by high prevalence in urban areas (8.08%) but 2.82% of country people were infected, by frequence in man (5.94%) but 3.08% of women were carriers, and by heterosexual transmission. After this study HIV infection was more frequent and we have observed epidemiological modification (importance of vertical transmission). Frequent antigenic cross-reaction between HIV1 and HIV2 core proteins has been observed. Cross-reaction with other retrovirus is possible.
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Affiliation(s)
- J Morvan
- Laboratoire de Biologie clinique, Hôpital d'Instruction des Armées Robert-Picqué, Bordeaux-Armées
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