1
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Sassi G, Licata G, Ventriglia G, Wouters A, Lemaitre P, Seurinck R, Mori A, Grieco GE, Bissenova S, Ellis D, Caluwaerts S, Rottiers P, Vandamme N, Mathieu C, Dotta F, Gysemans C, Sebastiani G. A Plasma miR-193b-365 Signature Combined With Age and Glycemic Status Predicts Response to Lactococcus lactis-Based Antigen-Specific Immunotherapy in New-Onset Type 1 Diabetes. Diabetes 2023; 72:1470-1482. [PMID: 37494666 PMCID: PMC10545562 DOI: 10.2337/db22-0852] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 07/10/2023] [Indexed: 07/28/2023]
Abstract
Immunomodulation combined with antigen therapy holds great promise to arrest autoimmune type 1 diabetes, but clinical translation is hampered by a lack of prognostic biomarkers. Low-dose anti-CD3 plus Lactococcus lactis bacteria secreting proinsulin and IL-10 reversed new-onset disease in nonobese diabetic (NOD) mice, yet some mice were resistant to the therapy. Using miRNA profiling, six miRNAs (i.e., miR-34a-5p, miR-125a-3p, miR-193b-3p, miR-328, miR-365-3p, and miR-671-3p) were identified as differentially expressed in plasma of responder versus nonresponder mice before study entry. After validation and stratification in an independent cohort, plasma miR-193b-3p and miR-365-3p, combined with age and glycemic status at study entry, had the best power to predict, with high sensitivity and specificity, poor response to the therapy. These miRNAs were highly abundant in pancreas-infiltrating neutrophils and basophils with a proinflammatory and activated phenotype. Here, a set of miRNAs and disease-associated parameters are presented as a predictive signature for the L. lactis-based immunotherapy outcome in new-onset type 1 diabetes, hence allowing targeted recruitment of trial participants and accelerated trial execution. ARTICLE HIGHLIGHTS Low-dose anti-CD3 combined with oral gavage of genetically modified Lactococcus lactis bacteria secreting human proinsulin and IL-10 holds great promise to arrest autoimmune type 1 diabetes, but the absence of biomarkers predicting therapeutic success hampers clinical translation. A set of cell-free circulation miRNAs together with age and glycemia at baseline predicts a poor response after L. lactis-based immunotherapy in nonobese mice with new-onset diabetes. Pancreas-infiltrating neutrophils and basophils are identified as potential cellular sources of discovered miRNAs. The prognostic signature could guide targeted recruitment of patients with newly diagnosed type 1 diabetes in clinical trials with the L. lactis-based immunotherapy.
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Affiliation(s)
- Gabriele Sassi
- Clinical and Experimental Endocrinology, Chrometa, KU Leuven, Leuven, Belgium
| | - Giada Licata
- Diabetes Unit, Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
- Fondazione Umberto Di Mario ONLUS, Toscana Life Science, Siena, Italy
| | - Giuliana Ventriglia
- Diabetes Unit, Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
- Fondazione Umberto Di Mario ONLUS, Toscana Life Science, Siena, Italy
| | - Amber Wouters
- Clinical and Experimental Endocrinology, Chrometa, KU Leuven, Leuven, Belgium
| | - Pierre Lemaitre
- Clinical and Experimental Endocrinology, Chrometa, KU Leuven, Leuven, Belgium
| | - Ruth Seurinck
- Data Mining and Modelling for Biomedicine, VIB Center for Inflammation Research, Ghent, Belgium
- Department of Applied Mathematics, Computer Science and Statistics, Ghent University, Ghent, Belgium
| | - Alessia Mori
- Tuscany Centre for Precision Medicine, Siena, Italy
| | - Giuseppina Emanuela Grieco
- Diabetes Unit, Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
- Fondazione Umberto Di Mario ONLUS, Toscana Life Science, Siena, Italy
| | - Samal Bissenova
- Clinical and Experimental Endocrinology, Chrometa, KU Leuven, Leuven, Belgium
| | - Darcy Ellis
- Clinical and Experimental Endocrinology, Chrometa, KU Leuven, Leuven, Belgium
| | | | | | - Niels Vandamme
- Data Mining and Modelling for Biomedicine, VIB Center for Inflammation Research, Ghent, Belgium
- VIB Single Cell Core, Leuven–Ghent, Ghent, Belgium
| | - Chantal Mathieu
- Clinical and Experimental Endocrinology, Chrometa, KU Leuven, Leuven, Belgium
| | - Francesco Dotta
- Diabetes Unit, Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
- Fondazione Umberto Di Mario ONLUS, Toscana Life Science, Siena, Italy
- Tuscany Centre for Precision Medicine, Siena, Italy
| | - Conny Gysemans
- Clinical and Experimental Endocrinology, Chrometa, KU Leuven, Leuven, Belgium
| | - Guido Sebastiani
- Diabetes Unit, Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
- Fondazione Umberto Di Mario ONLUS, Toscana Life Science, Siena, Italy
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2
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Zou Y, Laothamatas K, Sonett J, Lemaitre P, Stanifer B, Magda G, Grewal H, Shah L, Robbins H, Patel S, Miller A, Anderson M, Costa J, D'Ovidio F, Arcasoy S, Benvenuto L. Effect of Age and Transplant Type on Survival and Hospital-Free Days in COPD Patients. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1462] [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: 04/05/2023] Open
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3
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Greissman S, Laothamatas K, Costa J, D'Ovidio F, Grewal H, Lemaitre P, Magda G, Miller A, Patel S, Robbins H, Shah L, Sonnett J, Stanifer B, Arcasoy S, Benvenuto L. Comparison of Post-Transplant Survival Between Lung-Kidney and Lung Transplant Recipients. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1463] [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: 04/05/2023] Open
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4
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Greissman S, Laothamatas K, Costa J, D'Ovidio F, Grewal H, Lemaitre P, Magda G, Miller A, Patel S, Robbins H, Shah L, Sonett J, Stanifer B, Arcasoy S, Benvenuto L. Lung Transplant Waitlist Outcomes Before and after 2021 LAS Revision. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1445] [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: 04/05/2023] Open
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5
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Benvenuto L, Grewal H, Laothamatas K, Anderson M, Snyder M, Greissman S, Costa J, Shah L, Robbins H, Magda G, Sonett J, Lemaitre P, D'Ovidio F, Arcasoy S. Rapidly Declining Rates of Single Lung Transplant for COPD and ILD in the U.S. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1457] [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: 04/05/2023] Open
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6
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Lemaitre P, Tareen SH, Pasciuto E, Mascali L, Martirosyan A, Callaerts-Vegh Z, Poovathingal S, Dooley J, Holt MG, Yshii L, Liston A. Molecular and cognitive signatures of ageing partially restored through synthetic delivery of IL2 to the brain. EMBO Mol Med 2023; 15:e16805. [PMID: 36975362 PMCID: PMC10165365 DOI: 10.15252/emmm.202216805] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 03/08/2023] [Accepted: 03/10/2023] [Indexed: 03/29/2023] Open
Abstract
Cognitive decline is a common pathological outcome during aging, with an ill-defined molecular and cellular basis. In recent years, the concept of inflammaging, defined as a low-grade inflammation increasing with age, has emerged. Infiltrating T cells accumulate in the brain with age and may contribute to the amplification of inflammatory cascades and disruptions to the neurogenic niche observed with age. Recently, a small resident population of regulatory T cells has been identified in the brain, and the capacity of IL2-mediated expansion of this population to counter neuroinflammatory disease has been demonstrated. Here, we test a brain-specific IL2 delivery system for the prevention of neurological decline in aging mice. We identify the molecular hallmarks of aging in the brain glial compartments and identify partial restoration of this signature through IL2 treatment. At a behavioral level, brain IL2 delivery prevented the age-induced defect in spatial learning, without improving the general decline in motor skill or arousal. These results identify immune modulation as a potential path to preserving cognitive function for healthy aging.
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Affiliation(s)
- Pierre Lemaitre
- VIB Center for Brain and Disease Research, Leuven, Belgium
- Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium
| | | | - Emanuela Pasciuto
- VIB Center for Brain and Disease Research, Leuven, Belgium
- Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium
| | - Loriana Mascali
- VIB Center for Brain and Disease Research, Leuven, Belgium
- Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium
| | - Araks Martirosyan
- VIB Center for Brain and Disease Research, Leuven, Belgium
- Department of Neurosciences, KU Leuven, Leuven, Belgium
| | | | | | - James Dooley
- Immunology Programme, The Babraham Institute, Babraham, UK
- Department of Pathology, The University of Cambridge, Cambridge, UK
| | - Matthew G Holt
- VIB Center for Brain and Disease Research, Leuven, Belgium
- Department of Neurosciences, KU Leuven, Leuven, Belgium
- Instituto de Investigaçāo e Inovaçāo em Saúde (i3S), University of Porto, Porto, Portugal
| | - Lidia Yshii
- VIB Center for Brain and Disease Research, Leuven, Belgium
- Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium
- Department of Neurosciences, KU Leuven, Leuven, Belgium
| | - Adrian Liston
- VIB Center for Brain and Disease Research, Leuven, Belgium
- Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium
- Immunology Programme, The Babraham Institute, Babraham, UK
- Department of Pathology, The University of Cambridge, Cambridge, UK
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7
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Yshii L, Pasciuto E, Bielefeld P, Mascali L, Lemaitre P, Marino M, Dooley J, Kouser L, Verschoren S, Lagou V, Kemps H, Gervois P, de Boer A, Burton OT, Wahis J, Verhaert J, Tareen SHK, Roca CP, Singh K, Whyte CE, Kerstens A, Callaerts-Vegh Z, Poovathingal S, Prezzemolo T, Wierda K, Dashwood A, Xie J, Van Wonterghem E, Creemers E, Aloulou M, Gsell W, Abiega O, Munck S, Vandenbroucke RE, Bronckaers A, Lemmens R, De Strooper B, Van Den Bosch L, Himmelreich U, Fitzsimons CP, Holt MG, Liston A. Astrocyte-targeted gene delivery of interleukin 2 specifically increases brain-resident regulatory T cell numbers and protects against pathological neuroinflammation. Nat Immunol 2022; 23:878-891. [PMID: 35618831 PMCID: PMC9174055 DOI: 10.1038/s41590-022-01208-z] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [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: 03/01/2022] [Accepted: 04/11/2022] [Indexed: 12/21/2022]
Abstract
The ability of immune-modulating biologics to prevent and reverse pathology has transformed recent clinical practice. Full utility in the neuroinflammation space, however, requires identification of both effective targets for local immune modulation and a delivery system capable of crossing the blood-brain barrier. The recent identification and characterization of a small population of regulatory T (Treg) cells resident in the brain presents one such potential therapeutic target. Here, we identified brain interleukin 2 (IL-2) levels as a limiting factor for brain-resident Treg cells. We developed a gene-delivery approach for astrocytes, with a small-molecule on-switch to allow temporal control, and enhanced production in reactive astrocytes to spatially direct delivery to inflammatory sites. Mice with brain-specific IL-2 delivery were protected in traumatic brain injury, stroke and multiple sclerosis models, without impacting the peripheral immune system. These results validate brain-specific IL-2 gene delivery as effective protection against neuroinflammation, and provide a versatile platform for delivery of diverse biologics to neuroinflammatory patients.
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Affiliation(s)
- Lidia Yshii
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven, Department of Microbiology, Immunology and Transplantation, Leuven, Belgium
- KU Leuven - Department of Neurosciences, Leuven, Belgium
| | - Emanuela Pasciuto
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven, Department of Microbiology, Immunology and Transplantation, Leuven, Belgium
- KU Leuven - Department of Neurosciences, Leuven, Belgium
| | - Pascal Bielefeld
- Swammerdam Institute for Life Sciences, Faculty of Science, University of Amsterdam, Amsterdam, Netherlands
- Immunology Programme, The Babraham Institute, Babraham Research Campus, Cambridge, United Kingdom
| | - Loriana Mascali
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven, Department of Microbiology, Immunology and Transplantation, Leuven, Belgium
| | - Pierre Lemaitre
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven, Department of Microbiology, Immunology and Transplantation, Leuven, Belgium
| | - Marika Marino
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven - Department of Neurosciences, Leuven, Belgium
| | - James Dooley
- Immunology Programme, The Babraham Institute, Babraham Research Campus, Cambridge, United Kingdom
| | - Lubna Kouser
- Immunology Programme, The Babraham Institute, Babraham Research Campus, Cambridge, United Kingdom
| | - Stijn Verschoren
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven - Department of Neurosciences, Leuven, Belgium
| | - Vasiliki Lagou
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven, Department of Microbiology, Immunology and Transplantation, Leuven, Belgium
| | - Hannelore Kemps
- Cardio & Organ Systems (COST), Biomedical Research Institute (BIOMED), Hasselt University, Diepenbeek, Belgium
| | - Pascal Gervois
- Cardio & Organ Systems (COST), Biomedical Research Institute (BIOMED), Hasselt University, Diepenbeek, Belgium
| | - Antina de Boer
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven - Department of Neurosciences, Leuven, Belgium
| | - Oliver T Burton
- Immunology Programme, The Babraham Institute, Babraham Research Campus, Cambridge, United Kingdom
| | - Jérôme Wahis
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven - Department of Neurosciences, Leuven, Belgium
| | - Jens Verhaert
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven - Department of Neurosciences, Leuven, Belgium
| | - Samar H K Tareen
- Immunology Programme, The Babraham Institute, Babraham Research Campus, Cambridge, United Kingdom
| | - Carlos P Roca
- Immunology Programme, The Babraham Institute, Babraham Research Campus, Cambridge, United Kingdom
| | - Kailash Singh
- Immunology Programme, The Babraham Institute, Babraham Research Campus, Cambridge, United Kingdom
| | - Carly E Whyte
- Immunology Programme, The Babraham Institute, Babraham Research Campus, Cambridge, United Kingdom
| | - Axelle Kerstens
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven - Department of Neurosciences, Leuven, Belgium
- VIB Bio-Imaging Core, Leuven, Belgium
| | | | | | - Teresa Prezzemolo
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven, Department of Microbiology, Immunology and Transplantation, Leuven, Belgium
| | - Keimpe Wierda
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven - Department of Neurosciences, Leuven, Belgium
- VIB-KU Leuven Center for Brain & Disease Research, Electrophysiology Expertise Unit, Leuven, Belgium
| | - Amy Dashwood
- Immunology Programme, The Babraham Institute, Babraham Research Campus, Cambridge, United Kingdom
| | - Junhua Xie
- VIB Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Faculty of Sciences, Ghent University, Ghent, Belgium
| | - Elien Van Wonterghem
- VIB Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Faculty of Sciences, Ghent University, Ghent, Belgium
| | - Eline Creemers
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven - Department of Neurosciences, Leuven, Belgium
- VIB-KU Leuven Center for Brain & Disease Research, Electrophysiology Expertise Unit, Leuven, Belgium
| | - Meryem Aloulou
- Immunology Programme, The Babraham Institute, Babraham Research Campus, Cambridge, United Kingdom
- Toulouse Institute for Infectious and Inflammatory diseases (INFINITY), INSERM UMR1291, CNRS UMR 5051, Toulouse, France
| | - Willy Gsell
- KU Leuven, Department of Imaging and Pathology, Biomedical MRI, Leuven, Belgium
| | - Oihane Abiega
- Swammerdam Institute for Life Sciences, Faculty of Science, University of Amsterdam, Amsterdam, Netherlands
| | - Sebastian Munck
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven - Department of Neurosciences, Leuven, Belgium
- VIB Bio-Imaging Core, Leuven, Belgium
| | - Roosmarijn E Vandenbroucke
- VIB Center for Inflammation Research, Ghent, Belgium
- Department of Biomedical Molecular Biology, Faculty of Sciences, Ghent University, Ghent, Belgium
| | - Annelies Bronckaers
- Cardio & Organ Systems (COST), Biomedical Research Institute (BIOMED), Hasselt University, Diepenbeek, Belgium
| | - Robin Lemmens
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven - Department of Neurosciences, Leuven, Belgium
- University Hospitals Leuven, Department of Neurology, Leuven, Belgium
| | - Bart De Strooper
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven - Department of Neurosciences, Leuven, Belgium
- Dementia Research Institute, University College London, London, United Kingdom
| | - Ludo Van Den Bosch
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- KU Leuven - Department of Neurosciences, Leuven, Belgium
| | - Uwe Himmelreich
- KU Leuven, Department of Imaging and Pathology, Biomedical MRI, Leuven, Belgium
| | - Carlos P Fitzsimons
- Swammerdam Institute for Life Sciences, Faculty of Science, University of Amsterdam, Amsterdam, Netherlands
| | - Matthew G Holt
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium.
- KU Leuven - Department of Neurosciences, Leuven, Belgium.
- Instituto de Investigaçāo e Inovaçāo em Saúde (i3S), University of Porto, Porto, Portugal.
| | - Adrian Liston
- VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium.
- KU Leuven, Department of Microbiology, Immunology and Transplantation, Leuven, Belgium.
- Immunology Programme, The Babraham Institute, Babraham Research Campus, Cambridge, United Kingdom.
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8
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Hardy DA, Archer J, Lemaitre P, Vehring R, Reid JP, Walker JS. High time resolution measurements of droplet evaporation kinetics and particle crystallisation. Phys Chem Chem Phys 2021; 23:18568-18579. [PMID: 34612393 DOI: 10.1039/d1cp02840e] [Citation(s) in RCA: 6] [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: 01/08/2023]
Abstract
A refined technique for observing the complete evaporation behaviour of free-falling droplets, from droplet generation to complete solvent evaporation, with ultra-high time resolution is introduced and benchmarked. High-resolution phase-delay stroboscopic imaging is employed to simultaneously resolve the evolving droplet morphology, geometric and aerodynamic diameters, throughout the evaporative lifetime with a user-controlled < μs timescale. This allows rapid, complex morphological changes, such as crystallisation events, to be clearly observed and the corresponding mechanisms to be inferred. The dried particles are sampled for offline SEM analysis and the observed morphologies compared to the inflight imaging. Density changes can be calculated directly from the deviation between the geometric and aerodynamic diameters. The full capabilities of the new technique are demonstrated by examination of the different evaporation behaviours and crystallisation mechanisms for aqueous sodium chloride droplets evaporating under different ambient relative humidity (RH) conditions. The crystallisation window, defined as the time taken from initial to complete crystallisation, is shown to be RH dependent, extending from 0.03 s at 20% RH and 0.13 s at 40% RH. The different crystallisation mechanisms observed during the experiments are also clearly reflected in the final structure of the dry particles, with multi-crystal structures produced at low RH compared to single-crystal structures at higher RH. It is anticipated that this technique will unlock measurements which explore the evaporation behaviour and crystallisation mechanisms for rapid, complex droplet drying events, and with increasingly non-ideal solutions, relevant to industrial applications.
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Affiliation(s)
- D A Hardy
- School of Chemistry, University of Bristol, Bristol, BS8 1TS, UK.
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9
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Junius S, Mavrogiannis AV, Lemaitre P, Gerbaux M, Staels F, Malviya V, Burton O, Gergelits V, Singh K, Tito Tadeo RY, Raes J, Humblet-Baron S, Liston A, Schlenner SM. Unstable regulatory T cells, enriched for naïve and Nrp1 neg cells, are purged after fate challenge. Sci Immunol 2021; 6:6/61/eabe4723. [PMID: 34301799 DOI: 10.1126/sciimmunol.abe4723] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 04/27/2021] [Accepted: 06/23/2021] [Indexed: 12/12/2022]
Abstract
Regulatory T cells (Tregs) are indispensable for the control of immune homeostasis and have clinical potential as a cell therapy for treating autoimmunity. Tregs can lose expression of the lineage-defining Foxp3 transcription factor and acquire effector T cell (Teff) characteristics, a process referred to as Treg plasticity. The extent and reversibility of such plasticity during immune responses remain unknown. Here, using a murine genetic fate-mapping system, we show that Treg stability is maintained even during exposure to a complex microbial/antigenic environment. Furthermore, we demonstrate that the observed plasticity of Tregs after adoptive transfer into a lymphopenic environment is a property limited to only a subset of the Treg population, with the nonconverting majority of Tregs being resistant to plasticity upon secondary stability challenge. The unstable Treg fraction is a complex mixture of phenotypically distinct Tregs, enriched for naïve and neuropilin-1-negative Tregs, and includes peripherally induced Tregs and recent thymic emigrant Tregs These results suggest that a "purging" process can be used to purify stable Tregs that are capable of robust fate retention, with potential implications for improving cell transfer therapy.
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Affiliation(s)
- Steffie Junius
- KU Leuven-University of Leuven, Department of Microbiology, Immunology and Transplantation, Leuven 3000, Belgium.,VIB Center for Brain and Disease Research, Leuven 3000, Belgium
| | - Adamantios V Mavrogiannis
- KU Leuven-University of Leuven, Department of Microbiology, Immunology and Transplantation, Leuven 3000, Belgium
| | - Pierre Lemaitre
- KU Leuven-University of Leuven, Department of Microbiology, Immunology and Transplantation, Leuven 3000, Belgium
| | - Margaux Gerbaux
- KU Leuven-University of Leuven, Department of Microbiology, Immunology and Transplantation, Leuven 3000, Belgium.,Pediatric Department, Academic Children Hospital Queen Fabiola, Université Libre de Bruxelles, Brussels, Belgium
| | - Frederik Staels
- KU Leuven-University of Leuven, Department of Microbiology, Immunology and Transplantation, Leuven 3000, Belgium.,VIB Center for Brain and Disease Research, Leuven 3000, Belgium
| | - Vanshika Malviya
- KU Leuven-University of Leuven, Department of Microbiology, Immunology and Transplantation, Leuven 3000, Belgium
| | - Oliver Burton
- Immunology Programme, Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
| | - Václav Gergelits
- Immunology Programme, Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
| | - Kailash Singh
- Immunology Programme, Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
| | - Raul Yhossef Tito Tadeo
- KU Leuven-University of Leuven, Department of Microbiology, Immunology and Transplantation, Leuven 3000, Belgium.,VIB-KU Leuven Center for Microbiology, VIB, Leuven 3000, Belgium
| | - Jeroen Raes
- KU Leuven-University of Leuven, Department of Microbiology, Immunology and Transplantation, Leuven 3000, Belgium.,VIB-KU Leuven Center for Microbiology, VIB, Leuven 3000, Belgium
| | - Stephanie Humblet-Baron
- KU Leuven-University of Leuven, Department of Microbiology, Immunology and Transplantation, Leuven 3000, Belgium
| | - Adrian Liston
- KU Leuven-University of Leuven, Department of Microbiology, Immunology and Transplantation, Leuven 3000, Belgium. .,VIB Center for Brain and Disease Research, Leuven 3000, Belgium.,Immunology Programme, Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
| | - Susan M Schlenner
- KU Leuven-University of Leuven, Department of Microbiology, Immunology and Transplantation, Leuven 3000, Belgium.
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10
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Kerselidou D, Dohai BS, Nelson DR, Daakour S, De Cock N, Hassoun ZAO, Kim DK, Olivet J, El Assal DC, Jaiswal A, Alzahmi A, Saha D, Pain C, Matthijssens F, Lemaitre P, Herfs M, Chapuis J, Ghesquiere B, Vertommen D, Kriechbaumer V, Knoops K, Lopez-Iglesias C, van Zandvoort M, Lambert JC, Hanson J, Desmet C, Thiry M, Lauersen KJ, Vidal M, Van Vlierberghe P, Dequiedt F, Salehi-Ashtiani K, Twizere JC. Alternative glycosylation controls endoplasmic reticulum dynamics and tubular extension in mammalian cells. Sci Adv 2021; 7:7/19/eabe8349. [PMID: 33962942 PMCID: PMC8104865 DOI: 10.1126/sciadv.abe8349] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 03/18/2021] [Indexed: 05/28/2023]
Abstract
The endoplasmic reticulum (ER) is a central eukaryotic organelle with a tubular network made of hairpin proteins linked by hydrolysis of guanosine triphosphate nucleotides. Among posttranslational modifications initiated at the ER level, glycosylation is the most common reaction. However, our understanding of the impact of glycosylation on the ER structure remains unclear. Here, we show that exostosin-1 (EXT1) glycosyltransferase, an enzyme involved in N-glycosylation, is a key regulator of ER morphology and dynamics. We have integrated multiomics and superresolution imaging to characterize the broad effect of EXT1 inactivation, including the ER shape-dynamics-function relationships in mammalian cells. We have observed that inactivating EXT1 induces cell enlargement and enhances metabolic switches such as protein secretion. In particular, suppressing EXT1 in mouse thymocytes causes developmental dysfunctions associated with the ER network extension. Last, our data illuminate the physical and functional aspects of the ER proteome-glycome-lipidome structure axis, with implications in biotechnology and medicine.
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Affiliation(s)
- Despoina Kerselidou
- Laboratory of Viral Interactomes, GIGA Institute, University of Liege, Liege, Belgium
- Laboratory of Gene expression and Cancer, GIGA Institute, University of Liege, Liege, Belgium
| | - Bushra Saeed Dohai
- Division of Science and Math, New York University Abu Dhabi, Abu Dhabi, UAE
| | - David R Nelson
- Center for Genomics and Systems Biology (CGSB), New York University Abu Dhabi, Abu Dhabi, UAE
| | - Sarah Daakour
- Center for Genomics and Systems Biology (CGSB), New York University Abu Dhabi, Abu Dhabi, UAE
| | - Nicolas De Cock
- TERRA Teaching and Research Centre, University of Liege, Liege, Belgium
| | - Zahra Al Oula Hassoun
- Laboratory of Gene expression and Cancer, GIGA Institute, University of Liege, Liege, Belgium
| | - Dae-Kyum Kim
- The Donnelly Centre, University of Toronto, Toronto, ON, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
- Lunenfeld Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, Canada
| | - Julien Olivet
- Laboratory of Viral Interactomes, GIGA Institute, University of Liege, Liege, Belgium
| | - Diana C El Assal
- Division of Science and Math, New York University Abu Dhabi, Abu Dhabi, UAE
| | - Ashish Jaiswal
- Center for Genomics and Systems Biology (CGSB), New York University Abu Dhabi, Abu Dhabi, UAE
| | - Amnah Alzahmi
- Center for Genomics and Systems Biology (CGSB), New York University Abu Dhabi, Abu Dhabi, UAE
| | - Deeya Saha
- Laboratory of Viral Interactomes, GIGA Institute, University of Liege, Liege, Belgium
- Laboratory of Gene expression and Cancer, GIGA Institute, University of Liege, Liege, Belgium
| | - Charlotte Pain
- Plant Cell Biology, Biological and Medical Sciences, Oxford Brookes University, Oxford, UK
| | - Filip Matthijssens
- Department of Biomolecular Medicine and Center for Medical Genetics, Ghent University, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Pierre Lemaitre
- GIGA-I3 Unit, GIGA Institute, University of Liege, Liege, Belgium
| | - Michael Herfs
- GIGA-Cancer Unit, GIGA Institute, University of Liege, Liege, Belgium
| | - Julien Chapuis
- Laboratory of Excellence Distalz, INSERM Unit 1167, Pasteur Institute of Lille, Lille, France
| | - Bart Ghesquiere
- Metabolomics Expertise Center, Center for Cancer Biology, VIB Center for Cancer Biology, Leuven, Belgium
| | - Didier Vertommen
- de Duve Institute, Catholic University of Louvain, Brussels, Belgium
| | - Verena Kriechbaumer
- Plant Cell Biology, Biological and Medical Sciences, Oxford Brookes University, Oxford, UK
| | - Kèvin Knoops
- Microscopy CORE Lab, Maastricht Multimodal Molecular Imaging Institute, Maastricht University, Maastricht, Netherlands
| | - Carmen Lopez-Iglesias
- Microscopy CORE Lab, Maastricht Multimodal Molecular Imaging Institute, Maastricht University, Maastricht, Netherlands
| | - Marc van Zandvoort
- Department of Cell Biology, School for Cardiovascular Diseases (CARIM), School for Nutrition and Translational Research in Metabolism (NUTRIM), School for Mental health and Neuroscience (MHeNS), and School for Oncology and Developmental Biology (GROW), Maastricht University, Maastricht, Netherlands
| | - Jean-Charles Lambert
- Laboratory of Excellence Distalz, INSERM Unit 1167, Pasteur Institute of Lille, Lille, France
| | - Julien Hanson
- GIGA-Molecular Pharmacology, University of Liege, Liege, Belgium
| | | | - Marc Thiry
- Laboratory of cell and tissue Biology, GIGA-Neurosciences, University of Liege, Liege, Belgium
| | - Kyle J Lauersen
- Biological and Environmental Sciences and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Kingdom of Saudi Arabia
| | - Marc Vidal
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Genetics, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
| | - Pieter Van Vlierberghe
- Department of Biomolecular Medicine and Center for Medical Genetics, Ghent University, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Franck Dequiedt
- Laboratory of Gene expression and Cancer, GIGA Institute, University of Liege, Liege, Belgium.
| | - Kourosh Salehi-Ashtiani
- Division of Science and Math, New York University Abu Dhabi, Abu Dhabi, UAE.
- Center for Genomics and Systems Biology (CGSB), New York University Abu Dhabi, Abu Dhabi, UAE
| | - Jean-Claude Twizere
- Laboratory of Viral Interactomes, GIGA Institute, University of Liege, Liege, Belgium.
- TERRA Teaching and Research Centre, University of Liege, Liege, Belgium
- Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA, USA
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11
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Leiva-Juarez M, Benvenuto L, Costa J, Urso A, Stanifer B, Lemaitre P, Sonett J, Aversa M, Robbins H, Shah L, Arcasoy S, D'Ovidio F. Histologic Phenotypes and Outcomes in Single vs Double Lung Transplantation among Recipients with Interstitial Lung Disease. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.910] [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: 10/21/2022] Open
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12
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Dunne B, Pozniak J, Campo-Canaveral DeLaCruz J, Lemaitre P, Begum Y, Allen J, Cypel M, de Perrot M, Donahoe L, Yasufuku K, Pierre A, Waddell T, Keshavjee S, Yeung J. Single Lung Transplantation with a Rejected Contralateral Lung: Improved Assessment and Donor Lung Utilization in the Era of Ex Vivo Lung Perfusion. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.913] [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: 11/17/2022] Open
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13
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Lemaitre P, Bai Q, Legrand C, Chariot A, Close P, Bureau F, Desmet CJ. Loss of the Transfer RNA Wobble Uridine-Modifying Enzyme Elp3 Delays T Cell Cycle Entry and Impairs T Follicular Helper Cell Responses through Deregulation of Atf4. J Immunol 2021; 206:1077-1087. [PMID: 33483347 DOI: 10.4049/jimmunol.2000521] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 12/19/2020] [Indexed: 12/24/2022]
Abstract
The activation of T cells is accompanied by intensive posttranscriptional remodeling of their proteome. We observed that protein expression of enzymes that modify wobble uridine in specific tRNAs, namely elongator subunit 3 (Elp3) and cytosolic thiouridylase (Ctu)2, increased in the course of T cell activation. To investigate the role of these tRNA epitranscriptomic modifiers in T cell biology, we generated mice deficient for Elp3 in T cells. We show that deletion of Elp3 has discrete effects on T cells. In vitro, Elp3-deficient naive CD4+ T cells polarize normally but are delayed in entering the first cell cycle following activation. In vivo, different models of immunization revealed that Elp3-deficient T cells display reduced expansion, resulting in functional impairment of T follicular helper (TFH) responses, but not of other CD4+ effector T cell responses. Transcriptomic analyses identified a progressive overactivation of the stress-responsive transcription factor Atf4 in Elp3-deficient T cells. Overexpression of Atf4 in wild-type T cells phenocopies the effect of Elp3 loss on T cell cycle entry and TFH cell responses. Reciprocally, partial silencing of Atf4 or deletion of its downstream effector transcription factor Chop rescues TFH responses of Elp3-deficient T cells. Together, our results reveal that specific epitranscriptomic tRNA modifications contribute to T cell cycle entry and promote optimal TFH responses.
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Affiliation(s)
- Pierre Lemaitre
- Laboratory of Cellular and Molecular Immunology, Interdisciplinary Group for Applied Genoproteomics, Faculty of Veterinary Medicine, University of Liege, 4000 Liege, Belgium
| | - Qiang Bai
- Laboratory of Cellular and Molecular Immunology, Interdisciplinary Group for Applied Genoproteomics, Faculty of Veterinary Medicine, University of Liege, 4000 Liege, Belgium
| | - Céline Legrand
- Laboratory of Cellular and Molecular Immunology, Interdisciplinary Group for Applied Genoproteomics, Faculty of Veterinary Medicine, University of Liege, 4000 Liege, Belgium
| | - Alain Chariot
- Laboratory of Medical Chemistry, Interdisciplinary Group for Applied Genoproteomics, Faculty of Medicine, University of Liege, 4000 Liege, Belgium.,Walloon Excellence in Life Sciences and Biotechnology, 1300 Wavres, Belgium; and
| | - Pierre Close
- Walloon Excellence in Life Sciences and Biotechnology, 1300 Wavres, Belgium; and.,Laboratory of Cancer Signaling, Interdisciplinary Group for Applied Genoproteomics, Faculty of Medicine, University of Liege, 4000 Liege, Belgium
| | - Fabrice Bureau
- Laboratory of Cellular and Molecular Immunology, Interdisciplinary Group for Applied Genoproteomics, Faculty of Veterinary Medicine, University of Liege, 4000 Liege, Belgium.,Walloon Excellence in Life Sciences and Biotechnology, 1300 Wavres, Belgium; and
| | - Christophe J Desmet
- Laboratory of Cellular and Molecular Immunology, Interdisciplinary Group for Applied Genoproteomics, Faculty of Veterinary Medicine, University of Liege, 4000 Liege, Belgium; .,Walloon Excellence in Life Sciences and Biotechnology, 1300 Wavres, Belgium; and
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14
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Pasciuto E, Burton OT, Roca CP, Lagou V, Rajan WD, Theys T, Mancuso R, Tito RY, Kouser L, Callaerts-Vegh Z, de la Fuente AG, Prezzemolo T, Mascali LG, Brajic A, Whyte CE, Yshii L, Martinez-Muriana A, Naughton M, Young A, Moudra A, Lemaitre P, Poovathingal S, Raes J, De Strooper B, Fitzgerald DC, Dooley J, Liston A. Microglia Require CD4 T Cells to Complete the Fetal-to-Adult Transition. Cell 2020; 182:625-640.e24. [PMID: 32702313 PMCID: PMC7427333 DOI: 10.1016/j.cell.2020.06.026] [Citation(s) in RCA: 168] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 03/05/2020] [Accepted: 06/16/2020] [Indexed: 01/01/2023]
Abstract
The brain is a site of relative immune privilege. Although CD4 T cells have been reported in the central nervous system, their presence in the healthy brain remains controversial, and their function remains largely unknown. We used a combination of imaging, single cell, and surgical approaches to identify a CD69+ CD4 T cell population in both the mouse and human brain, distinct from circulating CD4 T cells. The brain-resident population was derived through in situ differentiation from activated circulatory cells and was shaped by self-antigen and the peripheral microbiome. Single-cell sequencing revealed that in the absence of murine CD4 T cells, resident microglia remained suspended between the fetal and adult states. This maturation defect resulted in excess immature neuronal synapses and behavioral abnormalities. These results illuminate a role for CD4 T cells in brain development and a potential interconnected dynamic between the evolution of the immunological and neurological systems. Video Abstract
Residential CD4 T cells are present in the healthy mouse and human brain Brain residency is a transient program initiated in situ and lasting weeks CD4 T cell entry around birth drives a transcriptional maturation step in microglia Absence of CD4 T cells results in defective synaptic pruning and behavior
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Affiliation(s)
- Emanuela Pasciuto
- VIB Center for Brain and Disease Research, VIB, Leuven 3000, Belgium; Department of Microbiology and Immunology, KU Leuven-University of Leuven, Leuven 3000, Belgium
| | - Oliver T Burton
- Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Carlos P Roca
- Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Vasiliki Lagou
- VIB Center for Brain and Disease Research, VIB, Leuven 3000, Belgium; Department of Microbiology and Immunology, KU Leuven-University of Leuven, Leuven 3000, Belgium
| | - Wenson D Rajan
- VIB Center for Brain and Disease Research, VIB, Leuven 3000, Belgium; Department of Microbiology and Immunology, KU Leuven-University of Leuven, Leuven 3000, Belgium
| | - Tom Theys
- Department of Neurosurgery, UZ Leuven, Leuven 3000, Belgium
| | - Renzo Mancuso
- VIB Center for Brain and Disease Research, VIB, Leuven 3000, Belgium; Department of Neurosciences, KU Leuven-University of Leuven, Leuven 3000, Belgium
| | - Raul Y Tito
- Department of Microbiology and Immunology, KU Leuven-University of Leuven, Leuven 3000, Belgium; VIB-KU Leuven Center for Microbiology, VIB, Leuven 3000, Belgium
| | - Lubna Kouser
- Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge CB22 3AT, UK
| | | | - Alerie G de la Fuente
- The Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry and Biomedical Science, Queen's University Belfast, Belfast BT7 1NN, UK
| | - Teresa Prezzemolo
- VIB Center for Brain and Disease Research, VIB, Leuven 3000, Belgium; Department of Microbiology and Immunology, KU Leuven-University of Leuven, Leuven 3000, Belgium
| | - Loriana G Mascali
- VIB Center for Brain and Disease Research, VIB, Leuven 3000, Belgium; Department of Microbiology and Immunology, KU Leuven-University of Leuven, Leuven 3000, Belgium
| | - Aleksandra Brajic
- VIB Center for Brain and Disease Research, VIB, Leuven 3000, Belgium; Department of Microbiology and Immunology, KU Leuven-University of Leuven, Leuven 3000, Belgium
| | - Carly E Whyte
- Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Lidia Yshii
- VIB Center for Brain and Disease Research, VIB, Leuven 3000, Belgium; Department of Microbiology and Immunology, KU Leuven-University of Leuven, Leuven 3000, Belgium
| | - Anna Martinez-Muriana
- VIB Center for Brain and Disease Research, VIB, Leuven 3000, Belgium; Department of Neurosciences, KU Leuven-University of Leuven, Leuven 3000, Belgium
| | - Michelle Naughton
- The Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry and Biomedical Science, Queen's University Belfast, Belfast BT7 1NN, UK
| | - Andrew Young
- The Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry and Biomedical Science, Queen's University Belfast, Belfast BT7 1NN, UK
| | - Alena Moudra
- Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Pierre Lemaitre
- VIB Center for Brain and Disease Research, VIB, Leuven 3000, Belgium; Department of Microbiology and Immunology, KU Leuven-University of Leuven, Leuven 3000, Belgium
| | | | - Jeroen Raes
- Department of Microbiology and Immunology, KU Leuven-University of Leuven, Leuven 3000, Belgium; VIB-KU Leuven Center for Microbiology, VIB, Leuven 3000, Belgium
| | - Bart De Strooper
- VIB Center for Brain and Disease Research, VIB, Leuven 3000, Belgium; Department of Neurosciences, KU Leuven-University of Leuven, Leuven 3000, Belgium; Dementia Research Institute, University College London, London WC1E 6BT, UK
| | - Denise C Fitzgerald
- The Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry and Biomedical Science, Queen's University Belfast, Belfast BT7 1NN, UK
| | - James Dooley
- Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge CB22 3AT, UK
| | - Adrian Liston
- VIB Center for Brain and Disease Research, VIB, Leuven 3000, Belgium; Department of Microbiology and Immunology, KU Leuven-University of Leuven, Leuven 3000, Belgium; Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge CB22 3AT, UK.
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15
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van Nieuwenhuijze A, Burton O, Lemaitre P, Denton AE, Cascalho A, Goodchild RE, Malengier-Devlies B, Cauwe B, Linterman MA, Humblet-Baron S, Liston A. Mice Deficient in Nucleoporin Nup210 Develop Peripheral T Cell Alterations. Front Immunol 2018; 9:2234. [PMID: 30323813 PMCID: PMC6173157 DOI: 10.3389/fimmu.2018.02234] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 03/31/2018] [Accepted: 09/07/2018] [Indexed: 12/15/2022] Open
Abstract
The nucleopore is an essential structure of the eukaryotic cell, regulating passage between the nucleus and cytoplasm. While individual functions of core nucleopore proteins have been identified, the role of other components, such as Nup210, are poorly defined. Here, through the use of an unbiased ENU mutagenesis screen for mutations effecting the peripheral T cell compartment, we identified a Nup210 mutation in a mouse strain with altered CD4/CD8 T cell ratios. Through the generation of Nup210 knockout mice we identified Nup210 as having a T cell-intrinsic function in the peripheral homeostasis of T cells. Remarkably, despite the deep evolutionary conservation of this key nucleopore complex member, no other major phenotypes developed, with viable and healthy knockout mice. These results identify Nup210 as an important nucleopore complex component for peripheral T cells, and raise further questions of why this nucleopore component shows deep evolutionary conservation despite seemingly redundant functions in most cell types.
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Affiliation(s)
- Annemarie van Nieuwenhuijze
- VIB Centre for Brain & Disease Research, VIB, Leuven, Belgium.,Department of Microbiology and Immunology University of Leuven, Leuven, Belgium
| | - Oliver Burton
- VIB Centre for Brain & Disease Research, VIB, Leuven, Belgium.,Department of Microbiology and Immunology University of Leuven, Leuven, Belgium
| | - Pierre Lemaitre
- VIB Centre for Brain & Disease Research, VIB, Leuven, Belgium.,Department of Microbiology and Immunology University of Leuven, Leuven, Belgium
| | - Alice E Denton
- Babraham Institute, Babraham Research Campus, Cambridge, United Kingdom
| | - Ana Cascalho
- VIB Centre for Brain & Disease Research, VIB, Leuven, Belgium.,Department of Neurosciences, University of Leuven, Leuven, Belgium
| | - Rose E Goodchild
- VIB Centre for Brain & Disease Research, VIB, Leuven, Belgium.,Department of Neurosciences, University of Leuven, Leuven, Belgium
| | - Bert Malengier-Devlies
- VIB Centre for Brain & Disease Research, VIB, Leuven, Belgium.,Department of Microbiology and Immunology University of Leuven, Leuven, Belgium
| | - Bénédicte Cauwe
- VIB Centre for Brain & Disease Research, VIB, Leuven, Belgium.,Department of Microbiology and Immunology University of Leuven, Leuven, Belgium
| | | | - Stephanie Humblet-Baron
- VIB Centre for Brain & Disease Research, VIB, Leuven, Belgium.,Department of Microbiology and Immunology University of Leuven, Leuven, Belgium
| | - Adrian Liston
- VIB Centre for Brain & Disease Research, VIB, Leuven, Belgium.,Department of Microbiology and Immunology University of Leuven, Leuven, Belgium
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16
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Janss T, Mesnil C, Pirottin D, Lemaitre P, Marichal T, Bureau F, Desmet CJ. Interferon response factor-3 promotes the pro-Th2 activity of mouse lung CD11b + conventional dendritic cells in response to house dust mite allergens. Eur J Immunol 2016; 46:2614-2628. [PMID: 27546168 DOI: 10.1002/eji.201646513] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 07/07/2016] [Accepted: 08/16/2016] [Indexed: 11/07/2022]
Abstract
Very few transcription factors have been identified that are required by antigen-presenting cells (APCs) to induce T helper type 2 (Th2) responses. Because lung CD11b+ conventional dendritic cells (CD11b+ cDCs) are responsible for priming Th2 responses in house-dust mite (HDM)-induced airway allergy, we used them as a model to identify transcriptional events regulating the pro-Th2 activity of cDCs. Transcriptomic profiling of lung CD11b+ cDCs exposed to HDM in vivo revealed first that HDM triggers an antiviral defence-like response, and second that the majority of HDM-induced transcriptional changes depend on the transcription factor Interferon Response Factor-3 (Irf3). Validating the functional relevance of these observations, Irf3-deficient CD11b+ cDCs displayed reduced pro-allergic activity. Indeed, Irf3-deficient CD11b+ cDCs induced less Th2, more regulatory T cell, and similar Th1 differentiation in naïve CD4+ T cells compared to their wild-type counterparts. The altered APC activity of Irf3 CD11b+ cDCs was associated with reduced expression of CD86 and was phenocopied by blocking CD86 activity in wild-type CD11b+ cDCs. Altogether, these results establish Irf3, known mostly for its role in antiviral responses, as a transcription factor involved in the induction of Th2 responses through the promotion of pro-Th2 costimulation in CD11b+ DCs.
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Affiliation(s)
- Thibaut Janss
- Laboratory of Cellular and Molecular Immunology, GIGA-I3, GIGA-Research Center and Faculty of Veterinary Medicine, University of Liege, Liege, Belgium
| | - Claire Mesnil
- Laboratory of Cellular and Molecular Immunology, GIGA-I3, GIGA-Research Center and Faculty of Veterinary Medicine, University of Liege, Liege, Belgium
| | - Dimitri Pirottin
- Laboratory of Cellular and Molecular Immunology, GIGA-I3, GIGA-Research Center and Faculty of Veterinary Medicine, University of Liege, Liege, Belgium
| | - Pierre Lemaitre
- Laboratory of Cellular and Molecular Immunology, GIGA-I3, GIGA-Research Center and Faculty of Veterinary Medicine, University of Liege, Liege, Belgium
| | - Thomas Marichal
- Laboratory of Cellular and Molecular Immunology, GIGA-I3, GIGA-Research Center and Faculty of Veterinary Medicine, University of Liege, Liege, Belgium
| | - Fabrice Bureau
- Laboratory of Cellular and Molecular Immunology, GIGA-I3, GIGA-Research Center and Faculty of Veterinary Medicine, University of Liege, Liege, Belgium
| | - Christophe J Desmet
- Laboratory of Cellular and Molecular Immunology, GIGA-I3, GIGA-Research Center and Faculty of Veterinary Medicine, University of Liege, Liege, Belgium.
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17
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Brunel M, Lemaitre P, Porcheron E, Coëtmellec S, Gréhan G, Jacquot-Kielar J. Interferometric out-of-focus imaging of ice particles with overlapping images. Appl Opt 2016; 55:4902-4909. [PMID: 27409116 DOI: 10.1364/ao.55.004902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
It is shown that the size and relative positions of two irregular rough particles can be analyzed using interferometric out-of-focus imaging despite the overlapping of their out-of-focus images. Simulations are confirmed by experiments done with ice particles generated in a freezing column.
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18
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Bourrous S, Bouilloux L, Ouf FX, Lemaitre P, Nerisson P, Thomas D, Appert-Collin J. Measurement and modeling of pressure drop of HEPA filters clogged with ultrafine particles. POWDER TECHNOL 2016. [DOI: 10.1016/j.powtec.2015.11.020] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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20
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Ouldarbi L, Pérret G, Lemaitre P, Porcheron E, Coëtmellec S, Gréhan G, Lebrun D, Brunel M. Simultaneous 3D location and size measurement of bubbles and sand particles in a flow using interferometric particle imaging. Appl Opt 2015; 54:7773-80. [PMID: 26368904 DOI: 10.1364/ao.54.007773] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We present a system to characterize a triphasic flow in a 3D volume (air bubbles and solid irregular particles in water) using only one CCD sensor. A cylindrical interferometric out-of-focus imaging setup is used to determine simultaneously the 3D position and the size of bubbles and irregular sand particles in a flow. The 3D position of the particles is deduced from the ellipticity of their out-of-focus image. The size of bubbles is deduced from analysis of interference fringes. The characteristics of irregular sand particles are obtained from analysis of their speckle-like pattern. Experiments are confirmed by simulations.
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21
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Verner C, Lemaitre P, Daniel A, Giumelli B, Lakhssassi N, Sixou M. Carpegen�real-time polymerase chain reaction vs. anaerobic culture for periodontal pathogen identification. ACTA ACUST UNITED AC 2006; 21:341-6. [PMID: 17064390 DOI: 10.1111/j.1399-302x.2006.00297.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [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: 11/25/2022]
Abstract
BACKGROUND/AIMS The aim of this study was to compare two methods of microbiological diagnosis, anaerobic bacterial culture and real-time polymerase chain reaction (PCR), for the detection of Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis, Prevotella intermedia, Tannerella forsythia, Fusobacterium nucleatum, and Treponema denticola. METHODS Seventy-two samples were collected from 18 patients who were suffering from aggressive periodontitis. The data obtained were compared for the two methods. RESULTS The results obtained with real-time PCR were different from those obtained with bacterial culture. The detection differences were 3% for A. actinomycetemcomitans, 8.33% for P. intermedia, and 12.5% for F. nucleatum. However, the differences for P. gingivalis and T. forsythia were 51.39% and 36.11%, respectively. No comparison was possible for T. denticola because it cannot be identified in culture. The variations found were the result of the better detection level (10(2) pathogens) of the PCR probe. Unlike bacterial culture, PCR allows the detection of T. denticola, which does not forming colonies and is oxygen sensitive. For F. nucleatum, T. forsythia and P. gingivalis, the real-time PCR technique was more sensitive than culture. CONCLUSION Good results were obtained with the real-time PCR technique for the six periopathogens targeted. This method seems to be indicated for its simplicity, rapidity and reproducibility but it cannot analyze data for an antibiotic susceptibility test. The periodontist must therefore choose one of these two methods according to his specific clinical objective: to obtain rapid, specific detection even with weak initial concentrations (but for targeted periopathogens only) or to be non-specific and analyze the pathological activity with an antibiogram.
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Affiliation(s)
- C Verner
- Department of Periodontology, Faculty of Dentistry, Nantes, France
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Lemaitre P, Porcheron E, Bouilloux L, Grehan G. GLOBAL RAINBOW REFRACTOMETRY DEVELOPMENT TO CHARACTERIZE HEAT AND MASS TRANSFERS IN A TWO PHASE FLOW. Radiation 2006. [DOI: 10.1615/ihtc13.p4.90] [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: 11/13/2022] Open
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Abstract
Gram-negative folliculitis usually involves the face and develops in patients with acne or rosacea during long-term antibiotic therapy. Numerous pathogens have been found, but not, until now, Acinetobacter baumanii which has previously been recognized as an important cause of nosocomial infections and hospital outbreaks. We report here a case of A. baumanii folliculitis of the face, neck, arms and upper part of trunk in a patient with AIDS responding to intravenous treatment with ticarcillin-clavulanic acid. The bacterium was not found on healthy skin and the source of the infection remained unknown.
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Affiliation(s)
- C Bachmeyer
- Service de Médecine Intenne, CHU Tenon Peor France.
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von Estorff U, Crutzen S, Hurst R, Lemaitre P, Hemsworth B, Davies L, Champigny F. European networks in structural integrity—status in 1995. Nuclear Engineering and Design 1996. [DOI: 10.1016/0029-5493(96)01194-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ardouin JL, Lemaitre P, Daniel A. [The role of chlorhexidine irrigation combined with ultrasonic root planing in treatment of periodontal disease. Preliminary study]. J Parodontol 1991; 10:407-11. [PMID: 1811049] [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: 12/28/2022]
Abstract
The beneficial effects of chlorhexidine on plaque formation have been well documented. This study was undertaken to evaluate the dual effects of chlorhexidine irrigation and root planing with an ultrasonic scaler. The parameters measured were plaque and gingival indices and bleeding on probing. A statistically significant decrease in all indices measured was demonstrated when compared with the test group of patients who received ultrasonic scaling and irrigation with sterile water.
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Affiliation(s)
- J L Ardouin
- Faculté de Chirurgie Dentaire, Département de Parodontologie, Nantes
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Tas H, Lemaitre P, Dekeyser J, Vandermeulen W, De Schutter F. Austenitic stainless steel degradation in dynamic Pb17Li systems. Fusion Engineering and Design 1991. [DOI: 10.1016/0920-3796(91)90015-i] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Lemaitre P, Bassede C. [The role of direct microscopy study of periodontal microflora. 10 years after Listgarten and Hellden]. J Parodontol 1988; 7:397-407. [PMID: 3078747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Lemaitre P, Daniel A. [Muco-gingival surgery, excess and insufficiency. Rational therapeutic choice]. Chir Dent Fr 1988; 58:69-75. [PMID: 3234068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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31
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Jallali-Naini M, Boussac G, Lemaitre P, Larcheveque M, Guillerm D, Lallemand JY. Efficient total syntheses of polygodial and drimenin. Tetrahedron Lett 1981. [DOI: 10.1016/s0040-4039(01)81809-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ackman CF, O'Regan S, Herba MJ, Laplante MP, Lemaitre P, Kaye M. Experience with polytetrafluoroethylene grafts in patients on long-term hemodialysis. Can J Surg 1979; 22:152-4. [PMID: 445249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Expanded polytetrafluoroethylene (PTFE) is a new material now being used to create subcutaneous arteriovenous anastomoses for vascular access in hemodialysis. The authors have been impressed with the versatility of grafts made from this material and, where failure occurs, the ease with which surgical revision can be carried out. Two cases are described to illustrate the adaptability of this material to reconstruction. The authors' initial impression based on 22 months' experience is that PTFE grafts have appreciably modified the management with respect to vascular access, of many patients on long-term hemodialysis.
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Lemaitre P, O'Regan S, Herba M, Kaye M. Complications in expanded polytetrafluoroethylene arteriovenous grafts: an angiographic study. AJR Am J Roentgenol 1978; 131:817-20. [PMID: 101034 DOI: 10.2214/ajr.131.5.817] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Expanded polytetrafluoroethylene grafts were used for creation of arteriovenous shunts in 35 patients on chronic hemodialysis. When flow studies or mechanical factors indicated abnormal flow in the graft, angiography was performed. Detection of venous backflow or obstruction, arterial stenosis, aneurysm formation, or graft kinking facilitated correction and thus salvage of the grafts.
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O'Regan S, Lemaitre P, Kaye M. Hemodynamic studies in patients with expanded polytetrafluoroethylene (PTFE) forearm grafts. Clin Nephrol 1978; 10:96-100. [PMID: 699409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
21 patients with polytetrafluoroethylene grafts inserted for hemodialysis access were studied to assess the hemodynamic parameters. Mean graft flow was 1.9 l/min with a range of 0.2-3.8 l/min. Intragraft pressure varied from 1 to 83 mmHg and was dependent on systemic pressure, graft flow and the presence of stenotic lesions. Mean cardiac output was 7.1 l/min and index 4.0 l/min and was positively correlated with graft flow. By obtaining this data surgical corrective action was taken in several patients prospectively thus removing the abnormalities and ensuring continued graft patency. The techniques described are reproducible and simple and can be carried out in less than five minutes with minimal patient discomfort or hazard.
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Lemaitre P, Ackman CF, O'Regan S, Laplante MP, Kaye M. Polytetrafluorethylene (PTFE) grafts for hemodialysis. 18 months' experience. Clin Nephrol 1978; 10:27-31. [PMID: 699396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
18 months clinical experience with 6 mm polytetrafluorethylene forearm grafts for hemodialysis access has been described. 35 grafts were implanted, all in patients who had unsuitable vessels for construction of a regular Brescia-Cimino forearm fistula. The overall patency was 71% with mean duration of 10.3 months, and at any one time more than 85% of the grafts at risk were functional. Complications, including undesirable flow rates, edema, thrombosis, aneurysm and cardiac failure have been discussed and rational methods of avoidance described. We believe the polytetrafluorethylene (PTFE) graft represents an important advance in hemodialysis access.
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Kaye M, Lemaitre P, O'Regan S. A new technique for measuring blood flow in polytetrafluorethylene grafts for hemodialysis. Clin Nephrol 1977; 8:533-4. [PMID: 340087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
A method has been described for the measurement of blood flow in non branching grafts using the isotope dilution principle. The technique is simple, reproducible and consistent and can be performed in less than ten minutes.
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