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Hermans D, Houben E, Baeten P, Slaets H, Janssens K, Hoeks C, Hosseinkhani B, Duran G, Bormans S, Gowing E, Hoornaert C, Beckers L, Fung WK, Schroten H, Ishikawa H, Fraussen J, Thoelen R, de Vries HE, Kooij G, Zandee S, Prat A, Hellings N, Broux B. Oncostatin M triggers brain inflammation by compromising blood-brain barrier integrity. Acta Neuropathol 2022; 144:259-281. [PMID: 35666306 DOI: 10.1007/s00401-022-02445-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 05/06/2022] [Accepted: 05/23/2022] [Indexed: 11/30/2022]
Abstract
Oncostatin M (OSM) is an IL-6 family member which exerts neuroprotective and remyelination-promoting effects after damage to the central nervous system (CNS). However, the role of OSM in neuro-inflammation is poorly understood. Here, we investigated OSM's role in pathological events important for the neuro-inflammatory disorder multiple sclerosis (MS). We show that OSM receptor (OSMRβ) expression is increased on circulating lymphocytes of MS patients, indicating their elevated responsiveness to OSM signalling. In addition, OSM production by activated myeloid cells and astrocytes is increased in MS brain lesions. In experimental autoimmune encephalomyelitis (EAE), a preclinical model of MS, OSMRβ-deficient mice exhibit milder clinical symptoms, accompanied by diminished T helper 17 (Th17) cell infiltration into the CNS and reduced BBB leakage. In vitro, OSM reduces BBB integrity by downregulating the junctional molecules claudin-5 and VE-cadherin, while promoting secretion of the Th17-attracting chemokine CCL20 by inflamed BBB-endothelial cells and reactive astrocytes. Using flow cytometric fluorescence resonance energy transfer (FRET) quantification, we found that OSM-induced endothelial CCL20 promotes activation of lymphocyte function-associated antigen 1 (LFA-1) on Th17 cells. Moreover, CCL20 enhances Th17 cell adhesion to OSM-treated inflamed endothelial cells, which is at least in part ICAM-1 mediated. Together, these data identify an OSM-CCL20 axis, in which OSM contributes significantly to BBB impairment during neuro-inflammation by inducing permeability while recruiting Th17 cells via enhanced endothelial CCL20 secretion and integrin activation. Therefore, care should be taken when considering OSM as a therapeutic agent for treatment of neuro-inflammatory diseases such as MS.
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Affiliation(s)
- Doryssa Hermans
- University MS Center, Campus Diepenbeek, Diepenbeek, Belgium.,Neuro-Immune Connections and Repair Lab, Department of Immunology and Infection, Biomedical Research Institute, UHasselt, Diepenbeek, Belgium
| | - Evelien Houben
- University MS Center, Campus Diepenbeek, Diepenbeek, Belgium.,Neuro-Immune Connections and Repair Lab, Department of Immunology and Infection, Biomedical Research Institute, UHasselt, Diepenbeek, Belgium
| | - Paulien Baeten
- University MS Center, Campus Diepenbeek, Diepenbeek, Belgium.,Neuro-Immune Connections and Repair Lab, Department of Immunology and Infection, Biomedical Research Institute, UHasselt, Diepenbeek, Belgium
| | - Helena Slaets
- University MS Center, Campus Diepenbeek, Diepenbeek, Belgium.,Neuro-Immune Connections and Repair Lab, Department of Immunology and Infection, Biomedical Research Institute, UHasselt, Diepenbeek, Belgium
| | - Kris Janssens
- University MS Center, Campus Diepenbeek, Diepenbeek, Belgium.,Neuro-Immune Connections and Repair Lab, Department of Immunology and Infection, Biomedical Research Institute, UHasselt, Diepenbeek, Belgium
| | - Cindy Hoeks
- University MS Center, Campus Diepenbeek, Diepenbeek, Belgium.,Neuro-Immune Connections and Repair Lab, Department of Immunology and Infection, Biomedical Research Institute, UHasselt, Diepenbeek, Belgium
| | - Baharak Hosseinkhani
- University MS Center, Campus Diepenbeek, Diepenbeek, Belgium.,Neuro-Immune Connections and Repair Lab, Department of Immunology and Infection, Biomedical Research Institute, UHasselt, Diepenbeek, Belgium
| | - Gayel Duran
- University MS Center, Campus Diepenbeek, Diepenbeek, Belgium.,Neuro-Immune Connections and Repair Lab, Department of Immunology and Infection, Biomedical Research Institute, UHasselt, Diepenbeek, Belgium
| | - Seppe Bormans
- Institute for Materials Research (IMO), UHasselt, Diepenbeek, Belgium
| | - Elizabeth Gowing
- Centre de Recherche du CHUM (CRCHUM), Neuroimmunology Unit, Montreal, QC, Canada
| | - Chloé Hoornaert
- Centre de Recherche du CHUM (CRCHUM), Neuroimmunology Unit, Montreal, QC, Canada
| | - Lien Beckers
- University MS Center, Campus Diepenbeek, Diepenbeek, Belgium.,Department of Immunology and Infection, Biomedical Research Institute, UHasselt, Diepenbeek, Belgium
| | - Wing Ka Fung
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC, Vrije Universiteit Amsterdam, MS Center Amsterdam, Amsterdam Neuroscience, Amsterdam, The Netherlands
| | - Horst Schroten
- Pediatric Infectious Diseases, Medical Faculty Mannheim, University Children's Hospital Mannheim, Heidelberg University, Mannheim, Germany
| | - Hiroshi Ishikawa
- Laboratory of Clinical Regenerative Medicine, Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Judith Fraussen
- University MS Center, Campus Diepenbeek, Diepenbeek, Belgium.,Department of Immunology and Infection, Biomedical Research Institute, UHasselt, Diepenbeek, Belgium
| | - Ronald Thoelen
- Institute for Materials Research (IMO), UHasselt, Diepenbeek, Belgium
| | - Helga E de Vries
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC, Vrije Universiteit Amsterdam, MS Center Amsterdam, Amsterdam Neuroscience, Amsterdam, The Netherlands
| | - Gijs Kooij
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC, Vrije Universiteit Amsterdam, MS Center Amsterdam, Amsterdam Neuroscience, Amsterdam, The Netherlands
| | - Stephanie Zandee
- Centre de Recherche du CHUM (CRCHUM), Neuroimmunology Unit, Montreal, QC, Canada
| | - Alexandre Prat
- Centre de Recherche du CHUM (CRCHUM), Neuroimmunology Unit, Montreal, QC, Canada
| | - Niels Hellings
- University MS Center, Campus Diepenbeek, Diepenbeek, Belgium.,Neuro-Immune Connections and Repair Lab, Department of Immunology and Infection, Biomedical Research Institute, UHasselt, Diepenbeek, Belgium
| | - Bieke Broux
- University MS Center, Campus Diepenbeek, Diepenbeek, Belgium. .,Neuro-Immune Connections and Repair Lab, Department of Immunology and Infection, Biomedical Research Institute, UHasselt, Diepenbeek, Belgium. .,Department of Internal Medicine, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands.
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Xiao D, Zang Z, Sapermsap N, Wang Q, Xie W, Chen Y, Uei Li DD. Dynamic fluorescence lifetime sensing with CMOS single-photon avalanche diode arrays and deep learning processors. BIOMEDICAL OPTICS EXPRESS 2021; 12:3450-3462. [PMID: 34221671 PMCID: PMC8221960 DOI: 10.1364/boe.425663] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 05/07/2021] [Accepted: 05/10/2021] [Indexed: 06/13/2023]
Abstract
Measuring fluorescence lifetimes of fast-moving cells or particles have broad applications in biomedical sciences. This paper presents a dynamic fluorescence lifetime sensing (DFLS) system based on the time-correlated single-photon counting (TCSPC) principle. It integrates a CMOS 192 × 128 single-photon avalanche diode (SPAD) array, offering an enormous photon-counting throughput without pile-up effects. We also proposed a quantized convolutional neural network (QCNN) algorithm and designed a field-programmable gate array embedded processor for fluorescence lifetime determinations. The processor uses a simple architecture, showing unparallel advantages in accuracy, analysis speed, and power consumption. It can resolve fluorescence lifetimes against disturbing noise. We evaluated the DFLS system using fluorescence dyes and fluorophore-tagged microspheres. The system can effectively measure fluorescence lifetimes within a single exposure period of the SPAD sensor, paving the way for portable time-resolved devices and shows potential in various applications.
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Affiliation(s)
- Dong Xiao
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, Scotland, UK
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G1 1XQ, Scotland, UK
| | - Zhenya Zang
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, Scotland, UK
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G1 1XQ, Scotland, UK
| | - Natakorn Sapermsap
- Department of Physics, University of Strathclyde, Glasgow, G4 0RE, Scotland, UK
| | - Quan Wang
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, Scotland, UK
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G1 1XQ, Scotland, UK
| | - Wujun Xie
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, Scotland, UK
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G1 1XQ, Scotland, UK
| | - Yu Chen
- Department of Physics, University of Strathclyde, Glasgow, G4 0RE, Scotland, UK
| | - David Day Uei Li
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, Scotland, UK
- Department of Biomedical Engineering, University of Strathclyde, Glasgow G1 1XQ, Scotland, UK
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Cai C, Sun H, Hu L, Fan Z. Visualization of integrin molecules by fluorescence imaging and techniques. ACTA ACUST UNITED AC 2021; 45:229-257. [PMID: 34219865 PMCID: PMC8249084 DOI: 10.32604/biocell.2021.014338] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Integrin molecules are transmembrane αβ heterodimers involved in cell adhesion, trafficking, and signaling. Upon activation, integrins undergo dynamic conformational changes that regulate their affinity to ligands. The physiological functions and activation mechanisms of integrins have been heavily discussed in previous studies and reviews, but the fluorescence imaging techniques -which are powerful tools for biological studies- have not. Here we review the fluorescence labeling methods, imaging techniques, as well as Förster resonance energy transfer assays used to study integrin expression, localization, activation, and functions.
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Affiliation(s)
- Chen Cai
- Department of Immunology, School of Medicine, UConn Health, Farmington, 06030, USA
| | - Hao Sun
- Department of Medicine, University of California, San Diego, La Jolla, 92093, USA
| | - Liang Hu
- Cardiovascular Institute of Zhengzhou University, Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450051, China
| | - Zhichao Fan
- Department of Immunology, School of Medicine, UConn Health, Farmington, 06030, USA
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