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Altenburg IS, Smets NG, Strijkers GJ, Bakker EN. Medin, a link between vascular pathology and dementia? J Cereb Blood Flow Metab 2024:271678X241289772. [PMID: 39370976 DOI: 10.1177/0271678x241289772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/08/2024]
Abstract
Medin is a protein fragment derived from milk fat globule epidermal growth factor VIII (MFG-E8). Medin aggregates are present in the vessel wall of most subjects over 50 years of age. In this narrative review, we focus on the consequences of medin aggregation in relation to the development of dementia. Recent literature revealed medin as biomarker for dementia in CSF, specifically of a vascular subtype. Preclinical work showed that medin is associated with aging-related cerebral vascular dysfunction, vascular stiffening, hypertension, and. vascular amyloid β deposition. These findings position medin as a potential mechanistic link between aging, vascular pathology and dementia.
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Affiliation(s)
- Ilse S Altenburg
- Department of Biomedical Engineering and Physics, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - Nina G Smets
- Department of Biomedical Engineering and Physics, Amsterdam University Medical Center, Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences Research Institute, Amsterdam, The Netherlands
- Amsterdam Neuroscience Research Institute, Amsterdam, The Netherlands
| | - Gustav J Strijkers
- Department of Biomedical Engineering and Physics, Amsterdam University Medical Center, Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences Research Institute, Amsterdam, The Netherlands
| | - Erik Ntp Bakker
- Department of Biomedical Engineering and Physics, Amsterdam University Medical Center, Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences Research Institute, Amsterdam, The Netherlands
- Amsterdam Neuroscience Research Institute, Amsterdam, The Netherlands
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2
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Karamanova N, Morrow KT, Maerivoet A, Madine J, Li M, Migrino RQ. Medin Induces Pro-Inflammatory Activation of Human Brain Vascular Smooth Muscle Cells. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.09.16.613366. [PMID: 39345549 PMCID: PMC11429804 DOI: 10.1101/2024.09.16.613366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/01/2024]
Abstract
Background Medin is one of the most common amyloidogenic proteins and accumulates in the vasculature with aging. Vascular medin accumulation is associated with Alzheimer's disease, vascular dementia and aortic aneurysms. Medin impairs smooth muscle-dependent vasodilation in isolated human brain cerebral arteries. The role of medin in vascular smooth muscle (VSMC) activation is unknown. We aim to evaluate the effects of medin on human brain VSMC activation. Methods VSMCs were exposed to physiologic doses of medin (0.5, 1 and 5 µM) without or with small molecule nuclear factor-κB (NFκB) inhibitor RO106-9920 (10 µM) for 20 hours. Polymerase chain reaction, Western blot/enzyme-linked immunosorbent assay were used to quantify gene and protein expressions/secretions, respectively, of pro-inflammatory factors (interleukin (IL)-6, IL-8 and monocyte chemoattractant protein (MCP)-1) and structural and enzyme proteins associated with VSMC phenotypic transformation (smooth muscle actin alpha 2 (ACTA2), myosin heavy chain 11 (MYH11) and NADPH oxidase 4 (NOX4)). Results Medin exposure increased VSMC gene expression and protein secretion of IL-6, IL-8 and MCP-1 (protein secretion 46.0±12.8x, 20.2±4.1x and 8.7±3.1x, respectively, medin 5 µM versus vehicle, all p<0.05). There was no change in gene or protein expressions of ACTA2, MYH11 and NOX4. Co-treatment with RO106-9920 reduced medin-induced increases in IL-6 and IL-8 and a trend towards reduced MCP-1 secretion. Conclusions Medin induced pro-inflammatory activation of human brain VSMCs that is mediated, at least in part, by NFκB. Acute medin treatment did not alter structural proteins involved in VSMC phenotypic transformation. The findings support medin as a potential novel mediator of and therapeutic target for vascular aging pathology.
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Mesdaghi S, Price R, Li M, Migrino RQ, Madine J, Rigden DJ. Investigating Medin Cleavage Accessibility in MfgE8: Conformational Insights Derived from Molecular Dynamics Simulations and AlphaFold2 Models. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.27.605412. [PMID: 39131300 PMCID: PMC11312466 DOI: 10.1101/2024.07.27.605412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/13/2024]
Abstract
Recent studies have indicated that the human amyloidogenic protein medin is associated with a range of vascular diseases, including aortic aneurysms, vascular dementia, and Alzheimer's disease. Medin accumulates in the vasculature with age, leading to endothelial dysfunction through oxidative and nitrative stress and inducing pro-inflammatory activation. Medin is a cleavage product from the C2 domain of MfgE8. The exact mechanism of medin production from MfgE8 is unknown, with crystal structures of homologous C2 domains suggesting that the cleavage sites are buried, requiring a conformational transition for medin production. Molecular dynamics simulations can explore a wide range of conformations, from small-scale bond rotations to large-scale changes like protein folding or ligand binding. This study employed a combination of full-atom and coarse-grained molecular dynamics simulations, along with CONCOORD- and AlphaFold2-generated models, to investigate MfgE8 conformations and their implications for medin cleavage site accessibility. The simulations revealed that MfgE8 tends to adopt a compact conformation with the RGD motif, important for cell attachment within the N-terminal domain, and the medin region in the C-terminal domain close in proximity. Formation of this compact structure is facilitated by interdomain electrostatic interactions that promote stability and in turn decrease the solvent-accessible surface area of the medin region and particularly the C-terminal medin cleavage site. This data enhances current knowledge on medin generation to propose that alterations in local environmental conditions, possibly through changes in glycosylation or other post-translational modifications are required to induce MfgE8 to unfold partially or fully: this would result in enhanced accessibility of the cleavage sites and therefore enable medin generation.
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Affiliation(s)
- Shahram Mesdaghi
- Institute of Systems, Molecular & Integrative Biology, University of Liverpool, Biosciences Building, Crown Street, Liverpool L69 7ZB, UK
- Computational Biology Facility, MerseyBio, University of Liverpool, Crown Street, Liverpool L69 7ZB, UK
| | - Rebecca Price
- Institute of Systems, Molecular & Integrative Biology, University of Liverpool, Biosciences Building, Crown Street, Liverpool L69 7ZB, UK
| | - Ming Li
- Phoenix Veterans Affairs, Phoenix, Arizona, USA
- University of Arizona College of Medicine-Phoenix, Arizona, USA
| | - Raymond Q Migrino
- Phoenix Veterans Affairs, Phoenix, Arizona, USA
- University of Arizona College of Medicine-Phoenix, Arizona, USA
| | - Jillian Madine
- Institute of Systems, Molecular & Integrative Biology, University of Liverpool, Biosciences Building, Crown Street, Liverpool L69 7ZB, UK
| | - Daniel J Rigden
- Institute of Systems, Molecular & Integrative Biology, University of Liverpool, Biosciences Building, Crown Street, Liverpool L69 7ZB, UK
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4
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Rios FJ, de Ciuceis C, Georgiopoulos G, Lazaridis A, Nosalski R, Pavlidis G, Tual-Chalot S, Agabiti-Rosei C, Camargo LL, Dąbrowska E, Quarti-Trevano F, Hellmann M, Masi S, Lopreiato M, Mavraganis G, Mengozzi A, Montezano AC, Stavropoulos K, Winklewski PJ, Wolf J, Costantino S, Doumas M, Gkaliagkousi E, Grassi G, Guzik TJ, Ikonomidis I, Narkiewicz K, Paneni F, Rizzoni D, Stamatelopoulos K, Stellos K, Taddei S, Touyz RM, Virdis A. Mechanisms of Vascular Inflammation and Potential Therapeutic Targets: A Position Paper From the ESH Working Group on Small Arteries. Hypertension 2024; 81:1218-1232. [PMID: 38511317 DOI: 10.1161/hypertensionaha.123.22483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
Inflammatory responses in small vessels play an important role in the development of cardiovascular diseases, including hypertension, stroke, and small vessel disease. This involves various complex molecular processes including oxidative stress, inflammasome activation, immune-mediated responses, and protein misfolding, which together contribute to microvascular damage. In addition, epigenetic factors, including DNA methylation, histone modifications, and microRNAs influence vascular inflammation and injury. These phenomena may be acquired during the aging process or due to environmental factors. Activation of proinflammatory signaling pathways and molecular events induce low-grade and chronic inflammation with consequent cardiovascular damage. Identifying mechanism-specific targets might provide opportunities in the development of novel therapeutic approaches. Monoclonal antibodies targeting inflammatory cytokines and epigenetic drugs, show promise in reducing microvascular inflammation and associated cardiovascular diseases. In this article, we provide a comprehensive discussion of the complex mechanisms underlying microvascular inflammation and offer insights into innovative therapeutic strategies that may ameliorate vascular injury in cardiovascular disease.
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Affiliation(s)
- Francisco J Rios
- Research Institute of the McGill University Health Centre, McGill University, Montreal, Canada (F.J.R., L.L.C., A.C.M., R.M.T.)
| | - Carolina de Ciuceis
- Department of Clinical and Experimental Sciences, University of Brescia (C.d.C., C.A.-R., D.R.)
| | - Georgios Georgiopoulos
- Angiology and Endothelial Pathophysiology Unit, Department of Clinical Therapeutics, Medical School (G.G., G.M., K. Stamatelopoulos), National and Kapodistrian University of Athens
| | - Antonios Lazaridis
- Third Department of Internal Medicine, Aristotle University of Thessaloniki, Papageorgiou Hospital, Greece (A.L., E.G.)
| | - Ryszard Nosalski
- Centre for Cardiovascular Sciences; Queen's Medical Research Institute, University of Edinburgh, United Kingdom (R.N., T.J.G.)
- Department of Internal Medicine, Center for Medical Genomics OMICRON, Jagiellonian University Medical College, Krakow, Poland (R.N., T.J.G.)
| | - George Pavlidis
- Medical School (G.P., I.I.), National and Kapodistrian University of Athens
- Preventive Cardiology Laboratory and Clinic of Cardiometabolic Diseases, 2-Cardiology Department, Attikon Hospital, Athens, Greece (G.P., I.I.)
| | - Simon Tual-Chalot
- Biosciences Institute, Vascular Biology and Medicine Theme, Faculty of Medical Sciences, Newcastle University, United Kingdom (S.T.-C., K. Stellos)
| | - Claudia Agabiti-Rosei
- Department of Clinical and Experimental Sciences, University of Brescia (C.d.C., C.A.-R., D.R.)
| | - Livia L Camargo
- Research Institute of the McGill University Health Centre, McGill University, Montreal, Canada (F.J.R., L.L.C., A.C.M., R.M.T.)
| | - Edyta Dąbrowska
- Department of Hypertension and Diabetology, Center of Translational Medicine (E.D., J.W., K.N.) and M.D.)
| | - Fosca Quarti-Trevano
- Clinica Medica, Department of Medicine and Surgery, University of Milano-Bicocca, Milan, Italy (F.Q.-T., G.G.)
| | - Marcin Hellmann
- Cardiac Diagnostics (M.H.), Medical University of Gdansk, Poland
| | - Stefano Masi
- Institute of Cardiovascular Science, University College London, United Kingdom (S.M.)
- Department of Clinical and Experimental Medicine, University of Pisa, Italy (S.M., M.L., A.M., S.T., A.V.)
| | - Mariarosaria Lopreiato
- Department of Clinical and Experimental Medicine, University of Pisa, Italy (S.M., M.L., A.M., S.T., A.V.)
| | - Georgios Mavraganis
- Angiology and Endothelial Pathophysiology Unit, Department of Clinical Therapeutics, Medical School (G.G., G.M., K. Stamatelopoulos), National and Kapodistrian University of Athens
| | - Alessandro Mengozzi
- Department of Clinical and Experimental Medicine, University of Pisa, Italy (S.M., M.L., A.M., S.T., A.V.)
- Center for Translational and Experimental Cardiology, Department of Cardiology, University Hospital Zurich, University of Zurich, Switzerland (A.M., F.P.)
- Health Science Interdisciplinary Center, Scuola Superiore Sant'Anna, Pisa (A.M.)
| | - Augusto C Montezano
- Research Institute of the McGill University Health Centre, McGill University, Montreal, Canada (F.J.R., L.L.C., A.C.M., R.M.T.)
| | - Konstantinos Stavropoulos
- Second Medical Department, Hippokration Hospital, Aristotle University of Thessaloniki, Greece (K. Stavropoulos)
| | - Pawel J Winklewski
- Departments of Human Physiology (P.J.W.), Medical University of Gdansk, Poland
| | - Jacek Wolf
- Department of Hypertension and Diabetology, Center of Translational Medicine (E.D., J.W., K.N.) and M.D.)
| | - Sarah Costantino
- University Heart Center (S.C., F.P.), University Hospital Zurich, Switzerland
| | - Michael Doumas
- Department of Hypertension and Diabetology, Center of Translational Medicine (E.D., J.W., K.N.) and M.D.)
| | - Eugenia Gkaliagkousi
- Third Department of Internal Medicine, Aristotle University of Thessaloniki, Papageorgiou Hospital, Greece (A.L., E.G.)
| | - Guido Grassi
- Clinica Medica, Department of Medicine and Surgery, University of Milano-Bicocca, Milan, Italy (F.Q.-T., G.G.)
| | - Tomasz J Guzik
- Centre for Cardiovascular Sciences; Queen's Medical Research Institute, University of Edinburgh, United Kingdom (R.N., T.J.G.)
- Department of Internal Medicine, Center for Medical Genomics OMICRON, Jagiellonian University Medical College, Krakow, Poland (R.N., T.J.G.)
| | - Ignatios Ikonomidis
- Medical School (G.P., I.I.), National and Kapodistrian University of Athens
- Preventive Cardiology Laboratory and Clinic of Cardiometabolic Diseases, 2-Cardiology Department, Attikon Hospital, Athens, Greece (G.P., I.I.)
| | - Krzysztof Narkiewicz
- Department of Hypertension and Diabetology, Center of Translational Medicine (E.D., J.W., K.N.) and M.D.)
| | - Francesco Paneni
- Center for Translational and Experimental Cardiology, Department of Cardiology, University Hospital Zurich, University of Zurich, Switzerland (A.M., F.P.)
- University Heart Center (S.C., F.P.), University Hospital Zurich, Switzerland
- Department of Research and Education (F.P.), University Hospital Zurich, Switzerland
| | - Damiano Rizzoni
- Department of Clinical and Experimental Sciences, University of Brescia (C.d.C., C.A.-R., D.R.)
- Division of Medicine, Spedali Civili di Brescia, Italy (D.R.)
| | - Kimon Stamatelopoulos
- Angiology and Endothelial Pathophysiology Unit, Department of Clinical Therapeutics, Medical School (G.G., G.M., K. Stamatelopoulos), National and Kapodistrian University of Athens
| | - Konstantinos Stellos
- Biosciences Institute, Vascular Biology and Medicine Theme, Faculty of Medical Sciences, Newcastle University, United Kingdom (S.T.-C., K. Stellos)
- Department of Cardiovascular Research, European Center for Angioscience, Medical Faculty Mannheim (K. Stellos), Heidelberg University, Germany
- Department of Cardiology, University Hospital Mannheim (K. Stellos), Heidelberg University, Germany
- German Centre for Cardiovascular Research, Heidelberg/Mannheim Partner Site (K. Stellos)
| | - Stefano Taddei
- Department of Clinical and Experimental Medicine, University of Pisa, Italy (S.M., M.L., A.M., S.T., A.V.)
| | - Rhian M Touyz
- Research Institute of the McGill University Health Centre, McGill University, Montreal, Canada (F.J.R., L.L.C., A.C.M., R.M.T.)
| | - Agostino Virdis
- Department of Clinical and Experimental Medicine, University of Pisa, Italy (S.M., M.L., A.M., S.T., A.V.)
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5
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Todorov-Völgyi K, González-Gallego J, Müller SA, Beaufort N, Malik R, Schifferer M, Todorov MI, Crusius D, Robinson S, Schmidt A, Körbelin J, Bareyre F, Ertürk A, Haass C, Simons M, Paquet D, Lichtenthaler SF, Dichgans M. Proteomics of mouse brain endothelium uncovers dysregulation of vesicular transport pathways during aging. NATURE AGING 2024; 4:595-612. [PMID: 38519806 DOI: 10.1038/s43587-024-00598-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 02/20/2024] [Indexed: 03/25/2024]
Abstract
Age-related decline in brain endothelial cell (BEC) function contributes critically to neurological disease. Comprehensive atlases of the BEC transcriptome have become available, but results from proteomic profiling are lacking. To gain insights into endothelial pathways affected by aging, we developed a magnetic-activated cell sorting-based mouse BEC enrichment protocol compatible with proteomics and resolved the profiles of protein abundance changes during aging. Unsupervised cluster analysis revealed a segregation of age-related protein dynamics with biological functions, including a downregulation of vesicle-mediated transport. We found a dysregulation of key regulators of endocytosis and receptor recycling (most prominently Arf6), macropinocytosis and lysosomal degradation. In gene deletion and overexpression experiments, Arf6 affected endocytosis pathways in endothelial cells. Our approach uncovered changes not picked up by transcriptomic studies, such as accumulation of vesicle cargo and receptor ligands, including Apoe. Proteomic analysis of BECs from Apoe-deficient mice revealed a signature of accelerated aging. Our findings provide a resource for analysing BEC function during aging.
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Affiliation(s)
- Katalin Todorov-Völgyi
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany.
| | - Judit González-Gallego
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
- Graduate School of Systemic Neuroscience (GSN), University Hospital, LMU Munich, Munich, Germany
| | - Stephan A Müller
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
- Neuroproteomics, School of Medicine and Health, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Nathalie Beaufort
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
| | - Rainer Malik
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
| | - Martina Schifferer
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Mihail Ivilinov Todorov
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, Neuherberg, Germany
| | - Dennis Crusius
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
| | - Sophie Robinson
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
- Graduate School of Systemic Neuroscience (GSN), University Hospital, LMU Munich, Munich, Germany
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
| | - Andree Schmidt
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
- Neuroproteomics, School of Medicine and Health, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Jakob Körbelin
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Florence Bareyre
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
- Institute of Clinical Neuroimmunology, University Hospital, LMU Munich, Munich, Germany
- Biomedical Center Munich (BMC), Faculty of Medicine, LMU Munich, Planegg-Martinsried, Germany
| | - Ali Ertürk
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, Neuherberg, Germany
| | - Christian Haass
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
- Division of Metabolic Biochemistry, Biomedical Center Munich (BMC), Faculty of Medicine, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Mikael Simons
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Dominik Paquet
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Stefan F Lichtenthaler
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
- Neuroproteomics, School of Medicine and Health, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Martin Dichgans
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany.
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany.
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany.
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6
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Zhang Y, Karamanova N, Morrow KT, Madine J, Truran S, Lozoya M, Weissig V, Li M, Nikkhah M, Park JG, Migrino RQ. Transcriptomic analyses reveal proinflammatory activation of human brain microvascular endothelial cells by aging-associated peptide medin and reversal by nanoliposomes. Sci Rep 2023; 13:18802. [PMID: 37914766 PMCID: PMC10620412 DOI: 10.1038/s41598-023-45959-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 10/26/2023] [Indexed: 11/03/2023] Open
Abstract
Medin is a common vascular amyloidogenic peptide recently implicated in Alzheimer's disease (AD) and vascular dementia and its pathology remains unknown. We aim to identify changes in transcriptomic profiles and pathways in human brain microvascular endothelial cells (HBMVECs) exposed to medin, compare that to exposure to β-amyloid (Aβ) and evaluate protection by monosialoganglioside-containing nanoliposomes (NL). HBMVECs were exposed for 20 h to medin (5 µM) without or with Aβ(1-42) (2 µM) or NL (300 µg/mL), and RNA-seq with signaling pathway analyses were performed. Separately, reverse transcription polymerase chain reaction of select identified genes was done in HBMVECs treated with medin (5 µM) without or with NFκB inhibitor RO106-9920 (10 µM) or NL (300 µg/mL). Medin caused upregulation of pro-inflammatory genes that was not aggravated by Aβ42 co-treatment but reversed by NL. Pathway analysis on differentially expressed genes revealed multiple pro-inflammatory signaling pathways, such as the tumor necrosis factor (TNF) and the nuclear factor-κB (NFkB) signaling pathways, were affected specifically by medin treatment. RO106-9920 and NL reduced medin-induced pro-inflammatory activation. Medin induced endothelial cell pro-inflammatory signaling in part via NFκB that was reversed by NL. This could have potential implications in the pathogenesis and treatment of vascular aging, AD and vascular dementia.
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Affiliation(s)
- Yining Zhang
- Center for Personalized Diagnostics, Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Nina Karamanova
- Phoenix Veterans Affairs Healthcare System, 650 E. Indian School Road, Phoenix, AZ, 85022, USA
| | - Kaleb T Morrow
- Phoenix Veterans Affairs Healthcare System, 650 E. Indian School Road, Phoenix, AZ, 85022, USA
| | | | - Seth Truran
- Phoenix Veterans Affairs Healthcare System, 650 E. Indian School Road, Phoenix, AZ, 85022, USA
| | | | | | - Ming Li
- Phoenix Veterans Affairs Healthcare System, 650 E. Indian School Road, Phoenix, AZ, 85022, USA
- University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA
| | - Mehdi Nikkhah
- Center for Personalized Diagnostics, Biodesign Institute, Arizona State University, Tempe, AZ, USA
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, USA
| | - Jin G Park
- Center for Personalized Diagnostics, Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Raymond Q Migrino
- Phoenix Veterans Affairs Healthcare System, 650 E. Indian School Road, Phoenix, AZ, 85022, USA.
- University of Arizona College of Medicine-Phoenix, Phoenix, AZ, USA.
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7
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Atawia RT, Batori R, Jordan CR, Kennard S, Antonova G, Bruder-Nascimento T, Mehta V, Saeed MI, Patel VS, Fukai T, Ushio-Fukai M, Huo Y, Fulton DJR, de Chantemèle EJB. Type 1 Diabetes Impairs Endothelium-Dependent Relaxation Via Increasing Endothelial Cell Glycolysis Through Advanced Glycation End Products, PFKFB3, and Nox1-Mediated Mechanisms. Hypertension 2023; 80:2059-2071. [PMID: 37729634 PMCID: PMC10514399 DOI: 10.1161/hypertensionaha.123.21341] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Accepted: 08/02/2023] [Indexed: 09/22/2023]
Abstract
BACKGROUND Type 1 diabetes (T1D) is a major cause of endothelial dysfunction. Although cellular bioenergetics has been identified as a new regulator of vascular function, whether glycolysis, the primary bioenergetic pathway in endothelial cells (EC), regulates vascular tone and contributes to impaired endothelium-dependent relaxation (EDR) in T1D remains unknown. METHODS Experiments were conducted in Akita mice with intact or selective deficiency in EC PFKFB3 (6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase 3), the main regulator of glycolysis. Seahorse analyzer and myography were employed to measure glycolysis and mitochondrial respiration, and EDR, respectively, in aortic explants. EC PFKFB3 (Ad-PFKFB3) and glycolysis (Ad-GlycoHi) were increased in situ via adenoviral transduction. RESULTS T1D increased EC glycolysis and elevated EC expression of PFKFB3 and NADPH oxidase Nox1 (NADPH oxidase homolog 1). Functionally, pharmacological and genetic inhibition of PFKFB3 restored EDR in T1D, while in situ aorta EC transduction with Ad-PFKFB3 or Ad-GlycoHi reproduced the impaired EDR associated with T1D. Nox1 inhibition restored EDR in aortic rings from Akita mice, as well as in Ad-PFKFB3-transduced aorta EC and lactate-treated wild-type aortas. T1D increased the expression of the advanced glycation end product precursor methylglyoxal in the aortas. Exposure of the aortas to methylglyoxal impaired EDR, which was prevented by PFKFB3 inhibition. T1D and exposure to methylglyoxal increased EC expression of HIF1α (hypoxia-inducible factor 1α), whose inhibition blunted methylglyoxal-mediated EC PFKFB3 upregulation. CONCLUSIONS EC bioenergetics, namely glycolysis, is a new regulator of vasomotion and excess glycolysis, a novel mechanism of endothelial dysfunction in T1D. We introduce excess methylglyoxal, HIF1α, and PFKFB3 as major effectors in T1D-mediated increased EC glycolysis.
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Affiliation(s)
- Reem T. Atawia
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, Abasia, Cairo, Egypt
| | - Robert Batori
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Coleton R. Jordan
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Simone Kennard
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Galina Antonova
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | | | - Vinay Mehta
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Muhammad I. Saeed
- Department of Surgery, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Vijay S Patel
- Department of Surgery, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Tohru Fukai
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Masuko Ushio-Fukai
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Yuqing Huo
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - David JR Fulton
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
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Light, Water, and Melatonin: The Synergistic Regulation of Phase Separation in Dementia. Int J Mol Sci 2023; 24:ijms24065835. [PMID: 36982909 PMCID: PMC10054283 DOI: 10.3390/ijms24065835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 03/17/2023] [Indexed: 03/22/2023] Open
Abstract
The swift rise in acceptance of molecular principles defining phase separation by a broad array of scientific disciplines is shadowed by increasing discoveries linking phase separation to pathological aggregations associated with numerous neurodegenerative disorders, including Alzheimer’s disease, that contribute to dementia. Phase separation is powered by multivalent macromolecular interactions. Importantly, the release of water molecules from protein hydration shells into bulk creates entropic gains that promote phase separation and the subsequent generation of insoluble cytotoxic aggregates that drive healthy brain cells into diseased states. Higher viscosity in interfacial waters and limited hydration in interiors of biomolecular condensates facilitate phase separation. Light, water, and melatonin constitute an ancient synergy that ensures adequate protein hydration to prevent aberrant phase separation. The 670 nm visible red wavelength found in sunlight and employed in photobiomodulation reduces interfacial and mitochondrial matrix viscosity to enhance ATP production via increasing ATP synthase motor efficiency. Melatonin is a potent antioxidant that lowers viscosity to increase ATP by scavenging excess reactive oxygen species and free radicals. Reduced viscosity by light and melatonin elevates the availability of free water molecules that allow melatonin to adopt favorable conformations that enhance intrinsic features, including binding interactions with adenosine that reinforces the adenosine moiety effect of ATP responsible for preventing water removal that causes hydrophobic collapse and aggregation in phase separation. Precise recalibration of interspecies melatonin dosages that account for differences in metabolic rates and bioavailability will ensure the efficacious reinstatement of the once-powerful ancient synergy between light, water, and melatonin in a modern world.
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9
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Whitehead M, Antonazzi M, Shanahan CM. Senescence and extracellular vesicles: novel partners in vascular amyloidosis. Aging (Albany NY) 2023; 15:1232-1234. [PMID: 36863314 PMCID: PMC10042679 DOI: 10.18632/aging.204571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 02/14/2023] [Indexed: 03/04/2023]
Affiliation(s)
- Meredith Whitehead
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular and Metabolic Medicine and Sciences, King's College London, UK
| | - Marco Antonazzi
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular and Metabolic Medicine and Sciences, King's College London, UK
| | - Catherine M Shanahan
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular and Metabolic Medicine and Sciences, King's College London, UK
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10
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Whitehead M, Yusoff S, Ahmad S, Schmidt L, Mayr M, Madine J, Middleton D, Shanahan CM. Vascular smooth muscle cell senescence accelerates medin aggregation via small extracellular vesicle secretion and extracellular matrix reorganization. Aging Cell 2023; 22:e13746. [PMID: 36433666 PMCID: PMC9924949 DOI: 10.1111/acel.13746] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 11/07/2022] [Accepted: 11/13/2022] [Indexed: 11/27/2022] Open
Abstract
Vascular amyloidosis, caused when peptide monomers aggregate into insoluble amyloid, is a prevalent age-associated pathology. Aortic medial amyloid (AMA) is the most common human amyloid and is composed of medin, a 50-amino acid peptide. Emerging evidence has implicated extracellular vesicles (EVs) as mediators of pathological amyloid accumulation in the extracellular matrix (ECM). To determine the mechanisms of AMA formation with age, we explored the impact of vascular smooth muscle cell (VSMC) senescence, EV secretion, and ECM remodeling on medin accumulation. Medin was detected in EVs secreted from primary VSMCs. Small, round medin aggregates colocalized with EV markers in decellularized ECM in vitro and medin was shown on the surface of EVs deposited in the ECM. Decreasing EV secretion with an inhibitor attenuated aggregation and deposition of medin in the ECM. Medin accumulation in the aortic wall of human subjects was strongly correlated with age and VSMC senescence increased EV secretion, increased EV medin loading and triggered deposition of fibril-like medin. Proteomic analysis showed VSMC senescence induced changes in EV cargo and ECM composition, which led to enhanced EV-ECM binding and accelerated medin aggregation. Abundance of the proteoglycan, HSPG2, was increased in the senescent ECM and colocalized with EVs and medin. Isolated EVs selectively bound to HSPG2 in the ECM and its knock-down decreased formation of fibril-like medin structures. These data identify VSMC-derived EVs and HSPG2 in the ECM as key mediators of medin accumulation, contributing to age-associated AMA development.
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Affiliation(s)
- Meredith Whitehead
- School of Cardiovascular and Metabolic Medicine & SciencesKing's College LondonLondonUK
| | - Syabira Yusoff
- School of Cardiovascular and Metabolic Medicine & SciencesKing's College LondonLondonUK
| | - Sadia Ahmad
- School of Cardiovascular and Metabolic Medicine & SciencesKing's College LondonLondonUK
| | - Lukas Schmidt
- School of Cardiovascular and Metabolic Medicine & SciencesKing's College LondonLondonUK
| | - Manuel Mayr
- School of Cardiovascular and Metabolic Medicine & SciencesKing's College LondonLondonUK
| | - Jillian Madine
- Institute of Systems, Molecular and Integrative BiologyUniversity of LiverpoolLondonUK
| | | | - Catherine M. Shanahan
- School of Cardiovascular and Metabolic Medicine & SciencesKing's College LondonLondonUK
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11
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Milk Fat Globule Epidermal Growth Factor VIII Fragment Medin in Age-Associated Arterial Adverse Remodeling and Arterial Disease. Cells 2023; 12:cells12020253. [PMID: 36672188 PMCID: PMC9857039 DOI: 10.3390/cells12020253] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 12/28/2022] [Accepted: 01/03/2023] [Indexed: 01/11/2023] Open
Abstract
Medin, a small 50-amino acid peptide, is an internal cleaved product from the second discoidin domain of milk fat globule epidermal growth factor VIII (MFG-E8) protein. Medin has been reported as the most common amylogenic protein in the upper part of the arterial system, including aortic, temporal, and cerebral arterial walls in the elderly. Medin has a high affinity to elastic fibers and is closely associated with arterial degenerative inflammation, elastic fiber fragmentation, calcification, and amyloidosis. In vitro, treating with the medin peptide promotes the inflammatory phenotypic shift of both endothelial cells and vascular smooth muscle cells. In vitro, ex vivo, and in vivo studies demonstrate that medin enhances the abundance of reactive oxygen species and reactive nitrogen species produced by both endothelial cells and vascular smooth muscle cells and promotes vascular endothelial dysfunction and arterial stiffening. Immunostaining and immunoblotting analyses of human samples indicate that the levels of medin are increased in the pathogenesis of aortic aneurysm/dissection, temporal arteritis, and cerebrovascular dementia. Thus, medin peptide could be targeted as a biomarker diagnostic tool or as a potential molecular approach to curbing the arterial degenerative inflammatory remodeling that accompanies aging and disease.
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12
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Griffiths DR, Matthew Law L, Young C, Fuentes A, Truran S, Karamanova N, Bell LC, Turner G, Emerson H, Mastroeni D, Gonzales RJ, Reaven PD, Chad Quarles C, Migrino RQ, Lifshitz J. Chronic Cognitive and Cerebrovascular Function after Mild Traumatic Brain Injury in Rats. J Neurotrauma 2022; 39:1429-1441. [PMID: 35593008 PMCID: PMC10870816 DOI: 10.1089/neu.2022.0015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Severe traumatic brain injury (TBI) results in cognitive dysfunction in part due to vascular perturbations. In contrast, the long-term vasculo-cognitive pathophysiology of mild TBI (mTBI) remains unknown. We evaluated mTBI effects on chronic cognitive and cerebrovascular function and assessed their interrelationships. Sprague-Dawley rats received midline fluid percussion injury (n = 20) or sham (n = 21). Cognitive function was assessed (3- and 6-month novel object recognition [NOR], novel object location [NOL], and temporal order object recognition [TOR]). Six-month cerebral blood flow (CBF) and cerebral blood volume (CBV) using contrast magnetic resonance imaging (MRI) and ex vivo circle of Willis artery endothelial and smooth muscle-dependent function were measured. mTBI rats showed significantly impaired NOR, with similar trends (non-significant) in NOL/TOR. Regional CBF and CBV were similar in sham and mTBI. NOR correlated with CBF in lateral hippocampus, medial hippocampus, and primary somatosensory barrel cortex, whereas it inversely correlated with arterial smooth muscle-dependent dilation. Six-month baseline endothelial and smooth muscle-dependent arterial function were similar among mTBI and sham, but post-angiotensin 2 stimulation, mTBI showed no change in smooth muscle-dependent dilation from baseline response, unlike the reduction in sham. mTBI led to chronic cognitive dysfunction and altered angiotensin 2-stimulated smooth muscle-dependent vasoreactivity. The findings of persistent pathophysiological consequences of mTBI in this animal model add to the broader understanding of chronic pathophysiological sequelae in human mild TBI.
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Affiliation(s)
- Daniel R. Griffiths
- Phoenix VA Health Care System, Phoenix, Arizona, USA
- University of Arizona College of Medicine – Phoenix, Phoenix, Arizona, USA
- Barrow Neurological Institute at Phoenix Children’s Hospital, Phoenix, Arizona, USA
| | - L. Matthew Law
- Phoenix VA Health Care System, Phoenix, Arizona, USA
- University of Arizona College of Medicine – Phoenix, Phoenix, Arizona, USA
- Barrow Neurological Institute at Phoenix Children’s Hospital, Phoenix, Arizona, USA
| | - Conor Young
- University of Arizona College of Medicine – Phoenix, Phoenix, Arizona, USA
| | | | - Seth Truran
- Phoenix VA Health Care System, Phoenix, Arizona, USA
| | | | - Laura C. Bell
- Barrow Neurological Institute, Phoenix, Arizona, USA
| | | | | | | | - Rayna J. Gonzales
- University of Arizona College of Medicine – Phoenix, Phoenix, Arizona, USA
| | - Peter D. Reaven
- Phoenix VA Health Care System, Phoenix, Arizona, USA
- University of Arizona College of Medicine – Phoenix, Phoenix, Arizona, USA
| | | | - Raymond Q. Migrino
- Phoenix VA Health Care System, Phoenix, Arizona, USA
- University of Arizona College of Medicine – Phoenix, Phoenix, Arizona, USA
| | - Jonathan Lifshitz
- Phoenix VA Health Care System, Phoenix, Arizona, USA
- University of Arizona College of Medicine – Phoenix, Phoenix, Arizona, USA
- Barrow Neurological Institute at Phoenix Children’s Hospital, Phoenix, Arizona, USA
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13
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Ni L, Liu L, Zhu W, Telljohann R, Zhang J, Monticone RE, McGraw KR, Liu C, Morrell CH, Garrido‐Gil P, Labandeira‐Garcia JL, Lakatta EG, Wang M. Inflammatory Role of Milk Fat Globule-Epidermal Growth Factor VIII in Age-Associated Arterial Remodeling. J Am Heart Assoc 2022; 11:e022574. [PMID: 36000422 PMCID: PMC9496444 DOI: 10.1161/jaha.121.022574] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Accepted: 03/24/2022] [Indexed: 11/16/2022]
Abstract
Background Age-associated aortic remodeling includes a marked increase in intimal medial thickness (IMT), associated with signs of inflammation. Although aortic wall milk fat globule-epidermal growth factor VIII (MFG-E8) increases with age, and is associated with aortic inflammation, it is not known whether MFG-E8 is required for the age-associated increase in aortic IMT. Here, we tested whether MFG-E8 is required for the age-associated increase in aortic IMT. Methods and Results To determine the role of MFG-E8 in the age-associated increase of IMT, we compared aortic remodeling in adult (20-week) and aged (96-week) MFG-E8 (-/-) knockout and age matched wild-type (WT) littermate mice. The average aortic IMT increased with age in the WT from 50±10 to 70±20 μm (P<0.0001) but did not significantly increase with age in MFG-E8 knockout mice. Because angiotensin II signaling is implicated as a driver of age-associated increase in IMT, we infused 30-week-old MFG-E8 knockout and age-matched littermate WT mice with angiotensin II or saline via osmotic mini-pumps to determine whether MFG-E8 is required for angiotensin II-induced aortic remodeling. (1) In WT mice, angiotensin II infusion substantially increased IMT, elastic lamina degradation, collagen deposition, and the proliferation of vascular smooth muscle cells; in contrast, these effects were significantly reduced in MFG-E8 KO mice; (2) On a molecular level, angiotensin II treatment significantly increased the activation and expression of matrix metalloproteinase type 2, transforming growth factor beta 1, and its downstream signaling molecule phosphorylated mother against decapentaplegic homolog 2, and collagen type I production in WT mice; however, in the MFG-E8 knockout mice, these molecular effects were significantly reduced; and (3) in WT mice, angiotensin II increased levels of aortic inflammatory markers phosphorylated nuclear factor-kappa beta p65, monocyte chemoattractant protein 1, tumor necrosis factor alpha, intercellular adhesion molecule 1, and vascular cell adhesion molecule 1 molecular expression, while in contrast, these inflammatory markers did not change in knockout mice. Conclusions Thus, MFG-E8 is required for both age-associated proinflammatory aortic remodeling and also for the angiotensin II-dependent induction in younger mice of an aortic inflammatory phenotype observed in advanced age. Targeting MFG-E8 would be a novel molecular approach to curb adverse arterial remodeling.
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Affiliation(s)
- Leng Ni
- Laboratory of Cardiovascular Science, National Institution on AgingNational Institutes of Health, Biomedical Research Center (BRC)BaltimoreMD
- Department of Vascular Surgery, Peking Union Medical College HospitalPeking Union Medical College & Chinese Academy of Medical SciencesBeijingChina
| | - Lijuan Liu
- Laboratory of Cardiovascular Science, National Institution on AgingNational Institutes of Health, Biomedical Research Center (BRC)BaltimoreMD
| | - Wanqu Zhu
- Laboratory of Cardiovascular Science, National Institution on AgingNational Institutes of Health, Biomedical Research Center (BRC)BaltimoreMD
| | - Richard Telljohann
- Laboratory of Cardiovascular Science, National Institution on AgingNational Institutes of Health, Biomedical Research Center (BRC)BaltimoreMD
| | - Jing Zhang
- Laboratory of Cardiovascular Science, National Institution on AgingNational Institutes of Health, Biomedical Research Center (BRC)BaltimoreMD
| | - Robert E. Monticone
- Laboratory of Cardiovascular Science, National Institution on AgingNational Institutes of Health, Biomedical Research Center (BRC)BaltimoreMD
| | - Kimberly R. McGraw
- Laboratory of Cardiovascular Science, National Institution on AgingNational Institutes of Health, Biomedical Research Center (BRC)BaltimoreMD
| | - Changwei Liu
- Department of Vascular Surgery, Peking Union Medical College HospitalPeking Union Medical College & Chinese Academy of Medical SciencesBeijingChina
| | - Christopher H. Morrell
- Laboratory of Cardiovascular Science, National Institution on AgingNational Institutes of Health, Biomedical Research Center (BRC)BaltimoreMD
| | - Pablo Garrido‐Gil
- Research Center for Molecular Medicine and Chronic Diseases (CIMUS), IDISUniversity of Santiago de CompostelaSpain
- Networking Research Center on Neurodegenerative Diseases (CIBERNED)MadridSpain
| | - Jose Luis Labandeira‐Garcia
- Research Center for Molecular Medicine and Chronic Diseases (CIMUS), IDISUniversity of Santiago de CompostelaSpain
- Networking Research Center on Neurodegenerative Diseases (CIBERNED)MadridSpain
| | - Edward G. Lakatta
- Laboratory of Cardiovascular Science, National Institution on AgingNational Institutes of Health, Biomedical Research Center (BRC)BaltimoreMD
| | - Mingyi Wang
- Laboratory of Cardiovascular Science, National Institution on AgingNational Institutes of Health, Biomedical Research Center (BRC)BaltimoreMD
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14
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Anikin DA, Solovyeva IA, Demko IV, Sobko EA, Kraposhina AY, Gordeeva NV. Free-radical oxidation as a pathogenetic factor of metabolic syndrome. OBESITY AND METABOLISM 2022. [DOI: 10.14341/omet12804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The medical and social significance of cardiovascular diseases remains high. One of the factors that determine cardiovascular risks is metabolic syndrome. As a result of excessive accumulation of lipid and carbohydrate metabolism products in metabolic syndrome, oxidative (oxidative) stress develops. The article considers both domestic and foreign scientific studies, which highlight various aspects of the influence of reactive oxygen and nitrogen species, as well as other free radicals on the formation of oxidative stress in pathological conditions that are part of the metabolic syndrome complex. This describes the mechanisms of the formation of chronic inflammation through excessive secretion of pro-inflammatory cytokines and adipokines, activation of the transcription factor NF-kB, as well as damage to the antioxidant system in obesity. Separately, a number of mechanisms of the stimulating effect of adipokines: leptin, adiponectin, chimerine, omentin 1, resistin, on the formation of oxidative stress have been noted. The ways of activating the polyol pathway, as well as diacyl-glycerol — protein kinase C — the signaling pathway of oxidative stress, the formation of mitochondrial dysfunction is described. As a result of which there is an excessive production of free radicals in insulin resistance, diabetes mellitus and macroand microvascular complications of diabetes. In addition, the influence of oxidative stress directly on the formation of cardiovascular diseases of atherosclerotic genesis, as well as arterial hypertension, has been shown.
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Affiliation(s)
- D. A. Anikin
- Professor V.F. Voino-Yasenetsky Krasnoyarsk State Medical University;
Krasnoyarsk Clinical Regional Hospital
| | - I. A. Solovyeva
- Professor V.F. Voino-Yasenetsky Krasnoyarsk State Medical University;
Krasnoyarsk Clinical Regional Hospital
| | - I. V. Demko
- Professor V.F. Voino-Yasenetsky Krasnoyarsk State Medical University;
Krasnoyarsk Clinical Regional Hospital
| | - E. A. Sobko
- Professor V.F. Voino-Yasenetsky Krasnoyarsk State Medical University;
Krasnoyarsk Clinical Regional Hospital
| | - A. Yu. Kraposhina
- Professor V.F. Voino-Yasenetsky Krasnoyarsk State Medical University;
Krasnoyarsk Clinical Regional Hospital
| | - N. V. Gordeeva
- Professor V.F. Voino-Yasenetsky Krasnoyarsk State Medical University;
Krasnoyarsk Clinical Regional Hospital
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15
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Dong H, Zhang Y, Huang Y, Deng H. Pathophysiology of RAGE in inflammatory diseases. Front Immunol 2022; 13:931473. [PMID: 35967420 PMCID: PMC9373849 DOI: 10.3389/fimmu.2022.931473] [Citation(s) in RCA: 61] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 07/06/2022] [Indexed: 12/24/2022] Open
Abstract
The receptor for advanced glycation end products (RAGE) is a non-specific multi-ligand pattern recognition receptor capable of binding to a range of structurally diverse ligands, expressed on a variety of cell types, and performing different functions. The ligand-RAGE axis can trigger a range of signaling events that are associated with diabetes and its complications, neurological disorders, cancer, inflammation and other diseases. Since RAGE is involved in the pathophysiological processes of many diseases, targeting RAGE may be an effective strategy to block RAGE signaling.
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16
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Marazuela P, Solé M, Bonaterra-Pastra A, Pizarro J, Camacho J, Martínez-Sáez E, Kuiperij HB, Verbeek MM, de Kort AM, Schreuder FHBM, Klijn CJM, Castillo-Ribelles L, Pancorbo O, Rodríguez-Luna D, Pujadas F, Delgado P, Hernández-Guillamon M. MFG-E8 (LACTADHERIN): a novel marker associated with cerebral amyloid angiopathy. Acta Neuropathol Commun 2021; 9:154. [PMID: 34530925 PMCID: PMC8444498 DOI: 10.1186/s40478-021-01257-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 09/04/2021] [Indexed: 02/08/2023] Open
Abstract
Brain accumulation of amyloid-beta (Aβ) is a crucial feature in Alzheimer´s disease (AD) and cerebral amyloid angiopathy (CAA), although the pathophysiological relationship between these diseases remains unclear. Numerous proteins are associated with Aβ deposited in parenchymal plaques and/or cerebral vessels. We hypothesized that the study of these proteins would increase our understanding of the overlap and biological differences between these two pathologies and may yield new diagnostic tools and specific therapeutic targets. We used a laser capture microdissection approach combined with mass spectrometry in the APP23 transgenic mouse model of cerebral-β-amyloidosis to specifically identify vascular Aβ-associated proteins. We focused on one of the main proteins detected in the Aβ-affected cerebrovasculature: MFG-E8 (milk fat globule-EGF factor 8), also known as lactadherin. We first validated the presence of MFG-E8 in mouse and human brains. Immunofluorescence and immunoblotting studies revealed that MFG-E8 brain levels were higher in APP23 mice than in WT mice. Furthermore, MFG-E8 was strongly detected in Aβ-positive vessels in human postmortem CAA brains, whereas MFG-E8 was not present in parenchymal Aβ deposits. Levels of MFG-E8 were additionally analysed in serum and cerebrospinal fluid (CSF) from patients diagnosed with CAA, patients with AD and control subjects. Whereas no differences were found in MFG-E8 serum levels between groups, MFG-E8 concentration was significantly lower in the CSF of CAA patients compared to controls and AD patients. Finally, in human vascular smooth muscle cells MFG-E8 was protective against the toxic effects of the treatment with the Aβ40 peptide containing the Dutch mutation. In summary, our study shows that MFG-E8 is highly associated with CAA pathology and highlights MFG-E8 as a new CSF biomarker that could potentially be used to differentiate cerebrovascular Aβ pathology from parenchymal Aβ deposition.
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Affiliation(s)
- Paula Marazuela
- Neurovascular Research Laboratory, Vall d'Hebron Research Institute, Hospital Universitari Vall d´Hebron, Universitat Autónoma de Barcelona, Pg. Vall d´Hebron, 119-129, 08035, Barcelona, Spain
| | - Montse Solé
- Neurovascular Research Laboratory, Vall d'Hebron Research Institute, Hospital Universitari Vall d´Hebron, Universitat Autónoma de Barcelona, Pg. Vall d´Hebron, 119-129, 08035, Barcelona, Spain
| | - Anna Bonaterra-Pastra
- Neurovascular Research Laboratory, Vall d'Hebron Research Institute, Hospital Universitari Vall d´Hebron, Universitat Autónoma de Barcelona, Pg. Vall d´Hebron, 119-129, 08035, Barcelona, Spain
| | - Jesús Pizarro
- Neurovascular Research Laboratory, Vall d'Hebron Research Institute, Hospital Universitari Vall d´Hebron, Universitat Autónoma de Barcelona, Pg. Vall d´Hebron, 119-129, 08035, Barcelona, Spain
| | - Jessica Camacho
- Pathology Department, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Elena Martínez-Sáez
- Pathology Department, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - H Bea Kuiperij
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud Alzheimer Centre, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Marcel M Verbeek
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud Alzheimer Centre, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Anna M de Kort
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud Alzheimer Centre, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Floris H B M Schreuder
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud Alzheimer Centre, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Catharina J M Klijn
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud Alzheimer Centre, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Laura Castillo-Ribelles
- Clinical Biochemistry Department, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Olalla Pancorbo
- Stroke Unit, Department of Neurology, Vall d'Hebron University Hospital, Barcelona, Spain
| | - David Rodríguez-Luna
- Stroke Unit, Department of Neurology, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Francesc Pujadas
- Neurology Department, Dementia Unit, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Pilar Delgado
- Neurovascular Research Laboratory, Vall d'Hebron Research Institute, Hospital Universitari Vall d´Hebron, Universitat Autónoma de Barcelona, Pg. Vall d´Hebron, 119-129, 08035, Barcelona, Spain
| | - Mar Hernández-Guillamon
- Neurovascular Research Laboratory, Vall d'Hebron Research Institute, Hospital Universitari Vall d´Hebron, Universitat Autónoma de Barcelona, Pg. Vall d´Hebron, 119-129, 08035, Barcelona, Spain.
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17
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Wang L, Zhao D, Wang H, Wang L, Liu X, Zhang H. FPS-ZM1 inhibits LPS-induced microglial inflammation by suppressing JAK/STAT signaling pathway. Int Immunopharmacol 2021; 100:108117. [PMID: 34509933 DOI: 10.1016/j.intimp.2021.108117] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/22/2021] [Accepted: 08/29/2021] [Indexed: 11/15/2022]
Abstract
FPS-ZM1 is an inhibitor of the receptor for advanced glycation end products (RAGE). Nevertheless, there are few reports about its direct effects on microglial inflammation, and the underlying molecular mechanisms remain to be clarified. The present study investigated the potential effects of FPS-ZM1 on lipopolysaccharide (LPS)-mediated microglial inflammation both in vivo and in vitro, and further elucidated the possible molecular mechanisms of action. FPS-ZM1 decreased LPS-induced overproduction of interleukin-1 beta (IL-1β), interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-α) and cyclooxygenase 2 (COX-2), in both BV-2 cells and primary microglial cells. FPS-ZM1 (10 mg/kg, i.p.) ameliorated proliferation and activation of microglia in the hippocampus of C57BL/6J mice subjected to LPS challenge (5 mg/kg, i.p.). Meanwhile, overproduction of pro-inflammatory cytokines IL-1β and TNF-α in the hippocampus was alleviated after treatment with FPS-ZM1. RNA-Sequencing (RNA-Seq) analysis showed involvement of Janus kinase (JAK)-signal transducers and activators of transcription (STAT) signaling pathway in the regulation of FPS-ZM1 on LPS-induced microglial inflammation. Further investigations demonstrated that FPS-ZM1 downregulated LPS-mediated increases in the phosphorylation levels of JAK/STAT both in vivo and in vitro. FPS-ZM1 also suppressed the nuclear translocation of transcription factor STAT1/3/5 in BV-2 cells. In addition, inhibition of JAK/STAT signaling pathway had an anti-inflammatory effect similar to FPS-ZM1 treatment. Taken together, our results verified the inhibitory effects of FPS-ZM1 against LPS-stimulated microglial inflammation, and for the first time demonstrated such anti-inflammatory activities on microglia are associated with regulation of JAK/STAT signaling pathway both in vivo and in vitro, which may shed new light on the pharmacological mechanisms of FPS-ZM1 against microglial inflammation.
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Affiliation(s)
- Lan Wang
- University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China; CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
| | - Danfeng Zhao
- CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
| | - Huan Wang
- CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
| | - Lele Wang
- University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China; CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
| | - Xiaohui Liu
- University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China; CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China
| | - Haiyan Zhang
- University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China; CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China.
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18
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Hendrickx JO, Martinet W, Van Dam D, De Meyer GRY. Inflammation, Nitro-Oxidative Stress, Impaired Autophagy, and Insulin Resistance as a Mechanistic Convergence Between Arterial Stiffness and Alzheimer's Disease. Front Mol Biosci 2021; 8:651215. [PMID: 33855048 PMCID: PMC8039307 DOI: 10.3389/fmolb.2021.651215] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 03/03/2021] [Indexed: 12/12/2022] Open
Abstract
The average age of the world's elderly population is steadily increasing. This unprecedented rise in the aged world population will increase the prevalence of age-related disorders such as cardiovascular disease (CVD) and neurodegeneration. In recent years, there has been an increased interest in the potential interplay between CVDs and neurodegenerative syndromes, as several vascular risk factors have been associated with Alzheimer's disease (AD). Along these lines, arterial stiffness is an independent risk factor for both CVD and AD. In this review, we discuss several inflammaging-related disease mechanisms including acute tissue-specific inflammation, nitro-oxidative stress, impaired autophagy, and insulin resistance which may contribute to the proposed synergism between arterial stiffness and AD.
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Affiliation(s)
- Jhana O. Hendrickx
- Laboratory of Physiopharmacology, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | - Wim Martinet
- Laboratory of Physiopharmacology, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | - Debby Van Dam
- Laboratory of Neurochemistry and Behavior, Institute Born-Bunge, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
- Department of Neurology and Alzheimer Research Center, University of Groningen and University Medical Center Groningen, Groningen, Netherlands
| | - Guido R. Y. De Meyer
- Laboratory of Physiopharmacology, Faculty of Pharmaceutical, Biomedical and Veterinary Sciences, University of Antwerp, Antwerp, Belgium
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Ni YQ, Zhan JK, Liu YS. Roles and mechanisms of MFG-E8 in vascular aging-related diseases. Ageing Res Rev 2020; 64:101176. [PMID: 32971257 DOI: 10.1016/j.arr.2020.101176] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 08/17/2020] [Accepted: 09/03/2020] [Indexed: 12/20/2022]
Abstract
The aging of the vasculature plays a crucial role in the pathological progression of various vascular aging-related diseases. As endothelial cells (ECs) and vascular smooth muscle cells (VSMCs) are essential parts in the inner and medial layers of vessel wall, respectively, the structural and functional alterations of ECs and VSMCs are the major causes of vascular aging. Milk fat globule-epidermal growth factor 8 (MFG-E8) is a multifunctional glycoprotein which exerts a regulatory role in the intercellular interactions involved in a variety of biological and pathological processes. Emerging evidence suggests that MFG-E8 is a novel and outstanding modulator for vascular aging via targeting at ECs and VSMCs. In this review, we will summarise the cumulative roles and mechanisms of MFG-E8 in vascular aging and vascular aging-related diseases with special emphasis on the functions of ECs and VSMCs. In addition, we also aim to focus on the promising diagnostic function as a biomarker and the potential therapeutic application of MFG-E8 in vascular aging and the clinical evaluation of vascular aging-related diseases.
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20
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Abstract
Receptor for advanced glycation end products (RAGE) is an immunoglobulin-like receptor present on cell surface. RAGE binds to an array of structurally diverse ligands, acts as a pattern recognition receptor (PRR) and is expressed on cells of different origin performing different functions. RAGE ligation leads to the initiation of a cascade of signaling events and is implicated in diseases, such as inflammation, cancer, diabetes, vascular dysfunctions, retinopathy, and neurodegenerative diseases. Because of the significant involvement of RAGE in the progression of numerous diseases, RAGE signaling has been targeted through use of inhibitors and anti-RAGE antibodies as a treatment strategy and therapy. Here in this review, we have summarized the physical and physiological aspects of RAGE biology in mammalian system and the importance of targeting this molecule in the treatment of various RAGE mediated pathologies. Highlights Receptor for advanced glycation end products (RAGE) is a member of immunoglobulin superfamily of receptors and involved in many pathophysiological conditions. RAGE ligation with its ligands leads to initiation of distinct signaling cascades and activation of numerous transcription factors. Targeting RAGE signaling through inhibitors and anti-RAGE antibodies can be promising treatment strategy.
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Affiliation(s)
- Nitish Jangde
- Laboratory of Vascular Immunology, Institute of Life Sciences, Bhubaneswar, India.,Manipal Academy of Higher Education, Manipal, India
| | - Rashmi Ray
- Laboratory of Vascular Immunology, Institute of Life Sciences, Bhubaneswar, India
| | - Vivek Rai
- Laboratory of Vascular Immunology, Institute of Life Sciences, Bhubaneswar, India
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21
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Medin aggregation causes cerebrovascular dysfunction in aging wild-type mice. Proc Natl Acad Sci U S A 2020; 117:23925-23931. [PMID: 32900929 DOI: 10.1073/pnas.2011133117] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Medin is the most common amyloid known in humans, as it can be found in blood vessels of the upper body in virtually everybody over 50 years of age. However, it remains unknown whether deposition of Medin plays a causal role in age-related vascular dysfunction. We now report that aggregates of Medin also develop in the aorta and brain vasculature of wild-type mice in an age-dependent manner. Strikingly, genetic deficiency of the Medin precursor protein, MFG-E8, eliminates not only vascular aggregates but also prevents age-associated decline of cerebrovascular function in mice. Given the prevalence of Medin aggregates in the general population and its role in vascular dysfunction with aging, targeting Medin may become a novel approach to sustain healthy aging.
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22
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Migrino RQ, Karamanova N, Truran S, Serrano GE, Davies HA, Madine J, Beach TG. Cerebrovascular medin is associated with Alzheimer's disease and vascular dementia. ALZHEIMER'S & DEMENTIA (AMSTERDAM, NETHERLANDS) 2020; 12:e12072. [PMID: 32875054 PMCID: PMC7447901 DOI: 10.1002/dad2.12072] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/18/2020] [Accepted: 06/24/2020] [Indexed: 11/10/2022]
Abstract
INTRODUCTION Medin, an aging-associated amyloidogenic protein, induces cerebrovascular dysfunction and inflammation. We investigated the relationship between cerebrovascular medin and Alzheimer's disease (AD) and vascular dementia (VaD). METHODS Cerebral arteriole medin was quantified from 91 brain donors with no dementia (ND), AD, VaD, or combined AD and VaD. Correlation analyses evaluated the relationship between arteriole medin, and plaques, tangles, or white matter lesions (WML). Receiver operating characteristic and regression analyses assessed whether medin is predictive of AD or VaD versus other cerebrovascular pathologies (circle of Willis [CoW] atherosclerosis and cerebral amyloid angiopathy [CAA]). RESULTS Arteriole medin was higher in those with AD, VaD, or combined AD/VaD versus ND (P < .05), and correlated with tangle, plaque, and WML, but not CAA or CoW atherosclerosis. Among cerebrovascular pathologies, medin was the strongest predictor of AD diagnosis, whereas CoW atherosclerosis and arteriole medin were predictors of VaD. DISCUSSION Cerebral arteriole medin is associated with and could be a potential novel risk factor or biomarker for AD and VaD.
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Affiliation(s)
- Raymond Q. Migrino
- Phoenix Veterans Affairs Health Care SystemPhoenixArizonaUSA
- University of Arizona College of Medicine‐PhoenixPhoenixArizonaUSA
| | - Nina Karamanova
- Phoenix Veterans Affairs Health Care SystemPhoenixArizonaUSA
| | - Seth Truran
- Phoenix Veterans Affairs Health Care SystemPhoenixArizonaUSA
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23
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Younger S, Jang H, Davies HA, Niemiec MJ, Garcia JGN, Nussinov R, Migrino RQ, Madine J, Arce FT. Medin Oligomer Membrane Pore Formation: A Potential Mechanism of Vascular Dysfunction. Biophys J 2020; 118:2769-2782. [PMID: 32402244 PMCID: PMC7264854 DOI: 10.1016/j.bpj.2020.04.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 04/11/2020] [Accepted: 04/17/2020] [Indexed: 12/12/2022] Open
Abstract
Medin, a 50-amino-acid cleavage product of the milk fat globule-EGF factor 8 protein, is one of the most common forms of localized amyloid found in the vasculature of individuals older than 50 years. Medin induces endothelial dysfunction and vascular inflammation, yet despite its prevalence in the human aorta and multiple arterial beds, little is known about the nature of its pathology. Medin oligomers have been implicated in the pathology of aortic aneurysm, aortic dissection, and more recently, vascular dementia. Recent in vitro biomechanical measurements found increased oligomer levels in aneurysm patients with altered aortic wall integrity. Our results suggest an oligomer-mediated toxicity mechanism for medin pathology. Using lipid bilayer electrophysiology, we show that medin oligomers induce ionic membrane permeability by pore formation. Pore activity was primarily observed for preaggregated medin species from the growth-phase and rarely for lag-phase species. Atomic force microscopy (AFM) imaging of medin aggregates at different stages of aggregation revealed the gradual formation of flat domains resembling the morphology of supported lipid bilayers. Transmission electron microscopy images showed the coexistence of compact oligomers, largely consistent with the AFM data, and larger protofibrillar structures. Circular dichroism spectroscopy revealed the presence of largely disordered species and suggested the presence of β-sheets. This observation and the significantly lower thioflavin T fluorescence emitted by medin aggregates compared to amyloid-β fibrils, along with the absence of amyloid fibers in the AFM and transmission electron microscopy images, suggest that medin aggregation into pores follows a nonamyloidogenic pathway. In silico modeling by molecular dynamics simulations provides atomic-level structural detail of medin pores with the CNpNC barrel topology and diameters comparable to values estimated from experimental pore conductances.
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Affiliation(s)
- Scott Younger
- Department of Biomedical Engineering, University of Arizona, Tucson, Arizona
| | - Hyunbum Jang
- Computational Structural Biology Section, Basic Science Program, Frederick National Laboratory for Cancer Research, Frederick, Maryland
| | - Hannah A Davies
- Institute of Integrative Biology, University of Liverpool, Liverpool, United Kingdom
| | - Martin J Niemiec
- Department of Biomedical Engineering, University of Arizona, Tucson, Arizona
| | - Joe G N Garcia
- Department of Medicine, University of Arizona, Tucson, Arizona
| | - Ruth Nussinov
- Computational Structural Biology Section, Basic Science Program, Frederick National Laboratory for Cancer Research, Frederick, Maryland; Department of Human Molecular Genetics and Biochemistry, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Raymond Q Migrino
- Office of Research, Phoenix Veterans Affairs Health Care System, Phoenix, Arizona; Department of Medicine, University of Arizona College of Medicine-Phoenix, Arizona
| | - Jillian Madine
- Institute of Integrative Biology, University of Liverpool, Liverpool, United Kingdom
| | - Fernando T Arce
- Department of Biomedical Engineering, University of Arizona, Tucson, Arizona; Department of Medicine, University of Arizona, Tucson, Arizona.
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24
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Meli AC. The impact of cardiovascular diseases and new gene variants in swaying Alzheimer's disease. Cardiovasc Res 2020; 115:e102-e104. [PMID: 31436832 DOI: 10.1093/cvr/cvz196] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Affiliation(s)
- Albano C Meli
- PhyMedExp, INSERM, CNRS, University of Montpellier, CHU Arnaud de Villeneuve, 34295 Montpellier Cedex 5, France
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25
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Karamanova N, Truran S, Serrano GE, Beach TG, Madine J, Weissig V, Davies HA, Veldhuizen J, Nikkhah M, Hansen M, Zhang W, D'Souza K, Franco DA, Migrino RQ. Endothelial Immune Activation by Medin: Potential Role in Cerebrovascular Disease and Reversal by Monosialoganglioside-Containing Nanoliposomes. J Am Heart Assoc 2020; 9:e014810. [PMID: 31928157 PMCID: PMC7033828 DOI: 10.1161/jaha.119.014810] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Background The function of medin, one of the most common human amyloid proteins that accumulates in the vasculature with aging, remains unknown. We aim to probe medin's role in cerebrovascular disease by comparing cerebral arterial medin content between cognitively normal and vascular dementia (VaD) patients and studying its effects on endothelial cell (EC) immune activation and neuroinflammation. We also tested whether monosialoganglioside‐containing nanoliposomes could reverse medin's adverse effects. Methods and Results Cerebral artery medin and astrocyte activation were measured and compared between VaD and cognitively normal elderly brain donors. ECs were exposed to physiologic dose of medin (5 μmol/L), and viability and immune activation (interleukin‐8, interleukin‐6, intercellular adhesion molecule‐1, and plasminogen activator inhibitor‐1) were measured without or with monosialoganglioside‐containing nanoliposomes (300 μg/mL). Astrocytes were exposed to vehicle, medin, medin‐treated ECs, or their conditioned media, and interleukin‐8 production was compared. Cerebral collateral arterial and parenchymal arteriole medin, white matter lesion scores, and astrocyte activation were higher in VaD versus cognitively normal donors. Medin induced EC immune activation (increased interleukin‐8, interleukin‐6, intercellular adhesion molecule‐1, and plasminogen activator inhibitor‐1) and reduced EC viability, which were reversed by monosialoganglioside‐containing nanoliposomes. Interleukin‐8 production was augmented when astrocytes were exposed to medin‐treated ECs or their conditioned media. Conclusions Cerebral arterial medin is higher in VaD compared with cognitively normal patients. Medin induces EC immune activation that modulates astrocyte activation, and its effects are reversed by monosialoganglioside‐containing nanoliposomes. Medin is a candidate novel risk factor for aging‐related cerebrovascular disease and VaD.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Mehdi Nikkhah
- Phoenix Veterans Affairs Phoenix AZ.,Arizona State University Tempe AZ
| | | | | | | | | | - Raymond Q Migrino
- Phoenix Veterans Affairs Phoenix AZ.,University of Arizona College of Medicine-Phoenix Phoenix AZ
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26
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Hu R, Wang MQ, Ni SH, Wang M, Liu LY, You HY, Wu XH, Wang YJ, Lu L, Wei LB. Salidroside ameliorates endothelial inflammation and oxidative stress by regulating the AMPK/NF-κB/NLRP3 signaling pathway in AGEs-induced HUVECs. Eur J Pharmacol 2020; 867:172797. [DOI: 10.1016/j.ejphar.2019.172797] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 11/10/2019] [Accepted: 11/14/2019] [Indexed: 01/22/2023]
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27
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Aqueous extract of Houttuynia cordata ameliorates aortic endothelial injury during hyperlipidemia via FoxO1 and p38 MAPK pathway. J Funct Foods 2019. [DOI: 10.1016/j.jff.2019.103510] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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28
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Davies HA, Caamaño-Gutiérrez E, Chim YH, Field M, Nawaytou O, Ressel L, Akhtar R, Madine J. Idiopathic degenerative thoracic aneurysms are associated with increased aortic medial amyloid. Amyloid 2019; 26:148-155. [PMID: 31210552 PMCID: PMC6816484 DOI: 10.1080/13506129.2019.1625323] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 05/20/2019] [Accepted: 05/27/2019] [Indexed: 02/06/2023]
Abstract
Objective: To explore the relationship of aortic medial amyloid with biochemical and micromechanical properties of the aortic wall in aneurysm patients. Methods: Human aortic tissues removed during aneurysm surgery from tricuspid (idiopathic degenerative aneurysm, DA) and bicuspid valve (BAV) patients were subjected to oscillatory nanoindentation experiments to determine localised mechanical properties of the tissue (shear storage modulus, G´ and shear loss modulus, G˝). Collagen, elastin, matrix metalloproteinase 2 and glycosaminoglycans concentrations were determined, along with relative levels of aortic medial amyloid-related factors (medin, milk fat globule-EGF factor 8, oligomers and fibrils). Measurements were combined with clinical data and statistical analyses performed. Results: The DA cohort can be divided based on their phenotype. One group shared similar characteristics with BAV patients, termed bicuspid like phenotype-tricuspid valve. The second group had high amyloid oligomer species present with a significantly lower G´ (p = .01), indicative of reduced elastic response of the tissue, termed amyloid-rich. Conclusions: We identified a group of DA patients with high amyloid oligomers and altered micromechanical and structural properties of the vessel wall. We propose these findings as a cause for aneurysm formation in these patients. Amyloid is not found in BAV patients, suggesting at least two distinct mechanisms for pathogenesis.
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Affiliation(s)
- Hannah A. Davies
- Institute of Integrative Biology, University of Liverpool, Liverpool, UK
| | - Eva Caamaño-Gutiérrez
- Computational Biology Facility, Technology Directorate, University of Liverpool, Liverpool, UK
| | - Ya Hua Chim
- Department of Mechanical, Materials and Aerospace Engineering, School of Engineering, University of Liverpool, Liverpool, UK
| | - Mark Field
- Liverpool Heart and Chest Hospital, Liverpool, UK
| | | | - Lorenzo Ressel
- Department of Veterinary Pathology and Public Health, Institute of Veterinary Science, University of Liverpool, Liverpool, UK
| | - Riaz Akhtar
- Department of Mechanical, Materials and Aerospace Engineering, School of Engineering, University of Liverpool, Liverpool, UK
| | - Jillian Madine
- Institute of Integrative Biology, University of Liverpool, Liverpool, UK
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29
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Migrino RQ, Truran S, Karamanova N, Serrano GE, Madrigal C, Davies HA, Madine J, Reaven P, Beach TG. Human cerebral collateral arteriole function in subjects with normal cognition, mild cognitive impairment, and dementia. Am J Physiol Heart Circ Physiol 2018; 315:H284-H290. [PMID: 29775413 PMCID: PMC6139628 DOI: 10.1152/ajpheart.00206.2018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 05/03/2018] [Accepted: 05/14/2018] [Indexed: 01/06/2023]
Abstract
Clinical and preclinical studies have suggested a link between cardiovascular disease and dementia disorders, but the role of the collateral brain circulation in cognitive dysfunction remains unknown. We aimed to test the hypothesis that leptomeningeal arteriole (LMA) function and response to metabolic stressors differ among subjects with dementia, mild cognitive impairment (MCI), and normal cognition (CN). After rapid autopsy, LMAs were isolated from subjects with CN ( n = 10), MCI ( n = 12), or dementia [ n = 42, Alzheimer's disease (AD), vascular dementia (VaD), or other dementia], and endothelial and smooth muscle-dependent function were measured at baseline and after exposure to β-amyloid (2 μM), palmitic acid (150 μM), or medin (5 μM) and compared. There were no differences among the groups in baseline endothelial function (maximum dilation to acetylcholine, CN: 74.1 ± 9.7%, MCI: 67.1 ± 4.8%, AD: 74.7 ± 2.8%, VaD: 72.0 ± 5.3%, and other dementia: 68.0 ± 8.0%) and smooth muscle-dependent function (CN: 93.4 ± 3.0%, MCI: 83.3 ± 4.1%, AD: 91.8 ± 1.7%, VaD: 91.7 ± 2.4%, and other dementia: 87.9 ± 4.9%). There was no correlation between last cognitive function score and baseline endothelial or smooth muscle-dependent function. LMA endothelial function and, to a lesser extent, smooth muscle-dependent function were impaired posttreatment with β-amyloid, palmitic acid, and medin. Posttreatment LMA responses were not different between subjects with CN/MCI vs. dementia. Baseline responses and impaired vasoreactivity after treatment with metabolic stressors did not differ among subjects with CN, MCI, and dementia. The results suggest that the cognitive dysfunction in dementia disorders is not attributable to differences in baseline brain collateral circulation function but may be influenced by exposure of the vasculature to metabolic stressors.
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Affiliation(s)
- Raymond Q Migrino
- Office of Research, Phoenix Veterans Affairs Health Care System, Phoenix, Arizona
- Department of Medicine, University of Arizona College of Medicine-Phoenix , Phoenix, Arizona
| | - Seth Truran
- Office of Research, Phoenix Veterans Affairs Health Care System, Phoenix, Arizona
| | - Nina Karamanova
- Office of Research, Phoenix Veterans Affairs Health Care System, Phoenix, Arizona
| | - Geidy E Serrano
- Department of Neuropathology, Banner-Sun Health Research Institute , Sun City, Arizona
| | - Calvin Madrigal
- Office of Research, Phoenix Veterans Affairs Health Care System, Phoenix, Arizona
| | - Hannah A Davies
- Department of Biochemistry, University of Liverpool , Liverpool , United Kingdom
| | - Jillian Madine
- Department of Biochemistry, University of Liverpool , Liverpool , United Kingdom
| | - Peter Reaven
- Office of Research, Phoenix Veterans Affairs Health Care System, Phoenix, Arizona
- Department of Medicine, University of Arizona College of Medicine-Phoenix , Phoenix, Arizona
| | - Thomas G Beach
- Department of Neuropathology, Banner-Sun Health Research Institute , Sun City, Arizona
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30
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Nagaraju S, Truong D, Mouneimne G, Nikkhah M. Microfluidic Tumor-Vascular Model to Study Breast Cancer Cell Invasion and Intravasation. Adv Healthc Mater 2018; 7:e1701257. [PMID: 29334196 DOI: 10.1002/adhm.201701257] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Revised: 12/14/2017] [Indexed: 12/16/2022]
Abstract
Cancer is a major leading cause of disease-related death in the world. The severe impact of cancer can be attributed to poor understanding of the mechanisms involved in earliest steps of the metastatic cascade, specifically invasion into the surrounding stroma and intravasation into the blood capillaries. However, conducting integrated biological studies of invasion and intravasation have been challenging, within in vivo models and traditional in vitro assay, due to difficulties in establishing a precise tumor microenvironment. To that end, in this work, a novel 3D microfluidic platform comprised of concentric three-layer cell-laden hydrogels for simultaneous investigation of breast cancer cell invasion and intravasation as well as vasculature maturation influenced by tumor-vascular crosstalk is developed. It was demonstrated that the presence of spontaneously formed vasculature enhance MDA-MB-231 invasion into the 3D stroma. Following invasion, cancer cells are visualized intravasating into the outer vasculature. Additionally, invading cancer cells significantly reduce vessel diameter while increasing permeability, consistent with previous in vivo studies. Major signaling cytokines involved in tumor-vascular crosstalk that govern cancer cell invasion and intravasation are further identified. Taken together, this platform will enable unique insights of critical biological events within the metastatic cascade, with significant potential for developing efficient cancer therapeutics.
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Affiliation(s)
- Supriya Nagaraju
- School of Biological and Health Systems Engineering (SBHSE) Arizona State University Tempe AZ 85287 USA
| | - Danh Truong
- School of Biological and Health Systems Engineering (SBHSE) Arizona State University Tempe AZ 85287 USA
| | | | - Mehdi Nikkhah
- School of Biological and Health Systems Engineering (SBHSE) Arizona State University Tempe AZ 85287 USA
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31
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Ghosh A, Gao L, Thakur A, Siu PM, Lai CWK. Role of free fatty acids in endothelial dysfunction. J Biomed Sci 2017; 24:50. [PMID: 28750629 PMCID: PMC5530532 DOI: 10.1186/s12929-017-0357-5] [Citation(s) in RCA: 262] [Impact Index Per Article: 37.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 07/24/2017] [Indexed: 02/06/2023] Open
Abstract
Plasma free fatty acids levels are increased in subjects with obesity and type 2 diabetes, playing detrimental roles in the pathogenesis of atherosclerosis and cardiovascular diseases. Increasing evidence showing that dysfunction of the vascular endothelium, the inner lining of the blood vessels, is the key player in the pathogenesis of atherosclerosis. In this review, we aimed to summarize the roles and the underlying mechanisms using the evidence collected from clinical and experimental studies about free fatty acid-mediated endothelial dysfunction. Because of the multifaceted roles of plasma free fatty acids in mediating endothelial dysfunction, elevated free fatty acid level is now considered as an important link in the onset of endothelial dysfunction due to metabolic syndromes such as diabetes and obesity. Free fatty acid-mediated endothelial dysfunction involves several mechanisms including impaired insulin signaling and nitric oxide production, oxidative stress, inflammation and the activation of the renin-angiotensin system and apoptosis in the endothelial cells. Therefore, targeting the signaling pathways involved in free fatty acid-induced endothelial dysfunction could serve as a preventive approach to protect against the occurrence of endothelial dysfunction and the subsequent complications such as atherosclerosis.
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Affiliation(s)
- Arijit Ghosh
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, HKSAR, China
- Department of Biomedical Sciences, City University of Hong Kong, HKSAR, China
| | - Lei Gao
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, HKSAR, China
| | - Abhimanyu Thakur
- Department of Biomedical Sciences, City University of Hong Kong, HKSAR, China
| | - Parco M. Siu
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, HKSAR, China
| | - Christopher W. K. Lai
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, HKSAR, China
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