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Balasundaram D, Veerasamy V, Sylvia Singarayar M, Neethirajan V, Ananth Devanesan A, Thilagar S. Therapeutic potential of probiotics in gut microbial homeostasis and Rheumatoid arthritis. Int Immunopharmacol 2024; 137:112501. [PMID: 38885604 DOI: 10.1016/j.intimp.2024.112501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 05/14/2024] [Accepted: 06/13/2024] [Indexed: 06/20/2024]
Abstract
Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by inflammation and joint damage. Existing treatment options primarily focus on managing symptoms and slowing disease progression, often with side effects and limitations. The gut microbiome, a vast community of microorganisms present in the gastrointestinal tract, plays a crucial role in health and disease. Recent research suggests a bidirectional relationship between the gut microbiome and RA, highlighting its potential as a therapeutic option. This review focuses on the interaction between the gut microbiome and RA development, by discussing how dysbiosis, an imbalance in gut bacteria, can contribute to RA through multiple mechanisms such as molecular mimicry, leaky gut, and metabolic dysregulation. Probiotics, live microorganisms with health benefits, are emerging as promising tools for managing RA. They can prevent the negative effects of dysbiosis by displacing harmful bacteria, producing anti-inflammatory metabolites like short-chain fatty acids (SCFA), Directly influencing immune cells, and modifying host metabolism. animal and clinical studies demonstrate the potential of probiotics in improving RA symptoms and disease outcomes. However, further research is needed to optimize probiotic strains, dosages, and treatment protocols for personalized and effective management of RA. This review summarizes the current understanding of the gut microbiome and its role in RA and discusses future research directions. In addition to the established role of gut dysbiosis in RA, emerging strategies like fecal microbiota transplantation, prebiotics, and postbiotics offer exciting possibilities. However, individual variations in gut composition necessitate personalized treatment plans. Long-term effects and clear regulations need to be established. Future research focusing on metagenomic analysis, combination therapies, and mechanistic understanding will unlock the full potential of gut microbiome modulation for effective RA management.
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Affiliation(s)
| | - Veeramurugan Veerasamy
- Department of Environmental Biotechnology, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620024, India
| | - Magdalin Sylvia Singarayar
- Department of Environmental Biotechnology, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620024, India
| | - Vivek Neethirajan
- Department of Environmental Biotechnology, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620024, India
| | | | - Sivasudha Thilagar
- Department of Environmental Biotechnology, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620024, India.
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2
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Kettunen P, Koistinaho J, Rolova T. Contribution of CNS and extra-CNS infections to neurodegeneration: a narrative review. J Neuroinflammation 2024; 21:152. [PMID: 38845026 PMCID: PMC11157808 DOI: 10.1186/s12974-024-03139-y] [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: 03/17/2024] [Accepted: 05/23/2024] [Indexed: 06/09/2024] Open
Abstract
Central nervous system infections have been suggested as a possible cause for neurodegenerative diseases, particularly sporadic cases. They trigger neuroinflammation which is considered integrally involved in neurodegenerative processes. In this review, we will look at data linking a variety of viral, bacterial, fungal, and protozoan infections to Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, multiple sclerosis and unspecified dementia. This narrative review aims to bring together a broad range of data currently supporting the involvement of central nervous system infections in the development of neurodegenerative diseases. The idea that no single pathogen or pathogen group is responsible for neurodegenerative diseases will be discussed. Instead, we suggest that a wide range of susceptibility factors may make individuals differentially vulnerable to different infectious pathogens and subsequent pathologies.
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Affiliation(s)
- Pinja Kettunen
- Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
| | - Jari Koistinaho
- Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland.
| | - Taisia Rolova
- Helsinki Institute of Life Science, University of Helsinki, Helsinki, Finland
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3
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Fruhwürth S, Zetterberg H, Paludan SR. Microglia and amyloid plaque formation in Alzheimer's disease - Evidence, possible mechanisms, and future challenges. J Neuroimmunol 2024; 390:578342. [PMID: 38640827 DOI: 10.1016/j.jneuroim.2024.578342] [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] [Received: 02/01/2024] [Revised: 03/21/2024] [Accepted: 04/03/2024] [Indexed: 04/21/2024]
Abstract
Alzheimer's disease (AD) is a neurodegenerative disease characterized by cognitive decline that severely affects patients and their families. Genetic and environmental risk factors, such as viral infections, synergize to accelerate the aging-associated neurodegeneration. Genetic risk factors for late-onset AD (LOAD), which accounts for most AD cases, are predominantly implicated in microglial and immune cell functions. As such, microglia play a major role in formation of amyloid beta (Aβ) plaques, the major pathological hallmark of AD. This review aims to provide an overview of the current knowledge regarding the role of microglia in Aβ plaque formation, as well as their impact on morphological and functional diversity of Aβ plaques. Based on this discussion, we seek to identify challenges and opportunities in this field with potential therapeutic implications.
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Affiliation(s)
- Stefanie Fruhwürth
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden.
| | - Henrik Zetterberg
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden; Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden; Department of Neurodegenerative Disease, Institute of Neurology, University College London Queen Square, London, UK; UK Dementia Research Institute at UCL, London, UK; Hong Kong Center for Neurodegenerative Diseases, Clear Water Bay, Hong Kong, China; Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, Madison, USA
| | - Søren R Paludan
- Department of Rheumatology and Inflammatory Research, Institute of Medicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden; Department of Biomedicine, Aarhus University, Aarhus, Denmark.
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4
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Wongchitrat P, Chanmee T, Govitrapong P. Molecular Mechanisms Associated with Neurodegeneration of Neurotropic Viral Infection. Mol Neurobiol 2024; 61:2881-2903. [PMID: 37946006 PMCID: PMC11043213 DOI: 10.1007/s12035-023-03761-6] [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: 08/25/2022] [Accepted: 10/31/2023] [Indexed: 11/12/2023]
Abstract
Viral infections of the central nervous system (CNS) cause variable outcomes from acute to severe neurological sequelae with increased morbidity and mortality. Viral neuroinvasion directly or indirectly induces encephalitis via dysregulation of the immune response and contributes to the alteration of neuronal function and the degeneration of neuronal cells. This review provides an overview of the cellular and molecular mechanisms of virus-induced neurodegeneration. Neurotropic viral infections influence many aspects of neuronal dysfunction, including promoting chronic inflammation, inducing cellular oxidative stress, impairing mitophagy, encountering mitochondrial dynamics, enhancing metabolic rewiring, altering neurotransmitter systems, and inducing misfolded and aggregated pathological proteins associated with neurodegenerative diseases. These pathogenetic mechanisms create a multidimensional injury of the brain that leads to specific neuronal and brain dysfunction. The understanding of the molecular mechanisms underlying the neurophathogenesis associated with neurodegeneration of viral infection may emphasize the strategies for prevention, protection, and treatment of virus infection of the CNS.
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Affiliation(s)
- Prapimpun Wongchitrat
- Center for Research Innovation and Biomedical Informatics, Faculty of Medical Technology, Mahidol University, 999 Phutthamonthon 4 Road, Salaya, Phutthamonthon, Nakhon Pathom, 73170, Thailand.
| | - Theerawut Chanmee
- Department of Clinical Chemistry, Faculty of Medical Technology, Mahidol University, Salaya, Nakhon Pathom, Thailand
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5
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Giorgi C, Castelli V, d’Angelo M, Cimini A. Organoids Modeling Stroke in a Petri Dish. Biomedicines 2024; 12:877. [PMID: 38672231 PMCID: PMC11048104 DOI: 10.3390/biomedicines12040877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 04/10/2024] [Accepted: 04/11/2024] [Indexed: 04/28/2024] Open
Abstract
Stroke is a common neurological disorder, the second leading cause of death, and the third leading cause of disability. Unfortunately, the only approved drug for it is tissue plasminogen, but the therapeutic window is limited. In this context, preclinical studies are relevant to better dissect the underlying mechanisms of stroke and for the drug screening of potential therapies. Brain organoids could be relevant in this setting. They are derived from pluripotent stem cells or isolated organ progenitors that differentiate to form an organ-like tissue, exhibiting multiple cell types that self-organize to form a structure not unlike the organ in vivo. Brain organoids mimic many key features of early human brain development at molecular, cellular, structural, and functional levels and have emerged as novel model systems that can be used to investigate human brain diseases including stroke. Brain organoids are a promising and powerful tool for ischemic stroke studies; however, there are a few concerns that need to be addressed, including the lack of vascularization and the many cell types that are typically present in the human brain. The aim of this review is to discuss the potential of brain organoids as a novel model system for studying ischemic stroke, highlighting both the advantages and disadvantages in the use of this technology.
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Affiliation(s)
| | | | - Michele d’Angelo
- Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (C.G.); (V.C.)
| | - Annamaria Cimini
- Department of Life, Health and Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy; (C.G.); (V.C.)
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6
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Rajendran K, Krishnan UM. Mechanistic insights and emerging therapeutic stratagems for Alzheimer's disease. Ageing Res Rev 2024; 97:102309. [PMID: 38615895 DOI: 10.1016/j.arr.2024.102309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 04/10/2024] [Accepted: 04/10/2024] [Indexed: 04/16/2024]
Abstract
Alzheimer's disease (AD), a multi-factorial neurodegenerative disorder has affected over 30 million individuals globally and these numbers are expected to increase in the coming decades. Current therapeutic interventions are largely ineffective as they focus on a single target. Development of an effective drug therapy requires a deep understanding of the various factors influencing the onset and progression of the disease. Aging and genetic factors exert a major influence on the development of AD. Other factors like post-viral infections, iron overload, gut dysbiosis, and vascular dysfunction also exacerbate the onset and progression of AD. Further, post-translational modifications in tau, DRP1, CREB, and p65 proteins increase the disease severity through triggering mitochondrial dysfunction, synaptic loss, and differential interaction of amyloid beta with different receptors leading to impaired intracellular signalling. With advancements in neuroscience tools, new inter-relations that aggravate AD are being discovered including pre-existing diseases and exposure to other pathogens. Simultaneously, new therapeutic strategies involving modulation of gene expression through targeted delivery or modulation with light, harnessing the immune response to promote clearance of amyloid deposits, introduction of stem cells and extracellular vesicles to replace the destroyed neurons, exploring new therapeutic molecules from plant, marine and biological sources delivered in the free state or through nanoparticles and use of non-pharmacological interventions like music, transcranial stimulation and yoga. Polypharmacology approaches involving combination of therapeutic agents are also under active investigation for superior therapeutic outcomes. This review elaborates on various disease-causing factors, their underlying mechanisms, the inter-play between different disease-causing players, and emerging therapeutic options including those under clinical trials, for treatment of AD. The challenges involved in AD therapy and the way forward have also been discussed.
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Affiliation(s)
- Kayalvizhi Rajendran
- School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, Tamilnadu 613401, India; Centre for Nanotechnology & Advanced Biomaterials, SASTRA Deemed University, Thanjavur, Tamilnadu 613401, India
| | - Uma Maheswari Krishnan
- School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, Tamilnadu 613401, India; Centre for Nanotechnology & Advanced Biomaterials, SASTRA Deemed University, Thanjavur, Tamilnadu 613401, India; School of Arts, Sciences, Humanities & Education, SASTRA Deemed University, Thanjavur, Tamilnadu 613401, India.
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7
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Eteleeb AM, Novotny BC, Tarraga CS, Sohn C, Dhungel E, Brase L, Nallapu A, Buss J, Farias F, Bergmann K, Bradley J, Norton J, Gentsch J, Wang F, Davis AA, Morris JC, Karch CM, Perrin RJ, Benitez BA, Harari O. Brain high-throughput multi-omics data reveal molecular heterogeneity in Alzheimer's disease. PLoS Biol 2024; 22:e3002607. [PMID: 38687811 PMCID: PMC11086901 DOI: 10.1371/journal.pbio.3002607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 05/10/2024] [Accepted: 03/28/2024] [Indexed: 05/02/2024] Open
Abstract
Unbiased data-driven omic approaches are revealing the molecular heterogeneity of Alzheimer disease. Here, we used machine learning approaches to integrate high-throughput transcriptomic, proteomic, metabolomic, and lipidomic profiles with clinical and neuropathological data from multiple human AD cohorts. We discovered 4 unique multimodal molecular profiles, one of them showing signs of poor cognitive function, a faster pace of disease progression, shorter survival with the disease, severe neurodegeneration and astrogliosis, and reduced levels of metabolomic profiles. We found this molecular profile to be present in multiple affected cortical regions associated with higher Braak tau scores and significant dysregulation of synapse-related genes, endocytosis, phagosome, and mTOR signaling pathways altered in AD early and late stages. AD cross-omics data integration with transcriptomic data from an SNCA mouse model revealed an overlapping signature. Furthermore, we leveraged single-nuclei RNA-seq data to identify distinct cell-types that most likely mediate molecular profiles. Lastly, we identified that the multimodal clusters uncovered cerebrospinal fluid biomarkers poised to monitor AD progression and possibly cognition. Our cross-omics analyses provide novel critical molecular insights into AD.
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Affiliation(s)
- Abdallah M. Eteleeb
- Department of Psychiatry, Washington University, Saint Louis, St. Louis, Missouri, United States of America
- The Charles F. and Joanne Knight Alzheimer Disease Research Center, Washington University, St. Louis, Missouri, United States of America
| | - Brenna C. Novotny
- Department of Psychiatry, Washington University, Saint Louis, St. Louis, Missouri, United States of America
| | - Carolina Soriano Tarraga
- Department of Psychiatry, Washington University, Saint Louis, St. Louis, Missouri, United States of America
| | - Christopher Sohn
- Department of Psychiatry, Washington University, Saint Louis, St. Louis, Missouri, United States of America
| | - Eliza Dhungel
- Department of Bioinformatics and Genomics, University of North Carolina at Charlotte, Charlotte, North Carolina, United States of America
| | - Logan Brase
- Department of Psychiatry, Washington University, Saint Louis, St. Louis, Missouri, United States of America
| | - Aasritha Nallapu
- Department of Psychiatry, Washington University, Saint Louis, St. Louis, Missouri, United States of America
| | - Jared Buss
- Department of Psychiatry, Washington University, Saint Louis, St. Louis, Missouri, United States of America
| | - Fabiana Farias
- Department of Psychiatry, Washington University, Saint Louis, St. Louis, Missouri, United States of America
- NeuroGenomics and Informatics Center, Washington University, St. Louis, Missouri, United States of America
| | - Kristy Bergmann
- Department of Psychiatry, Washington University, Saint Louis, St. Louis, Missouri, United States of America
- NeuroGenomics and Informatics Center, Washington University, St. Louis, Missouri, United States of America
| | - Joseph Bradley
- Department of Psychiatry, Washington University, Saint Louis, St. Louis, Missouri, United States of America
- NeuroGenomics and Informatics Center, Washington University, St. Louis, Missouri, United States of America
| | - Joanne Norton
- Department of Psychiatry, Washington University, Saint Louis, St. Louis, Missouri, United States of America
- NeuroGenomics and Informatics Center, Washington University, St. Louis, Missouri, United States of America
| | - Jen Gentsch
- Department of Psychiatry, Washington University, Saint Louis, St. Louis, Missouri, United States of America
- NeuroGenomics and Informatics Center, Washington University, St. Louis, Missouri, United States of America
| | - Fengxian Wang
- Department of Psychiatry, Washington University, Saint Louis, St. Louis, Missouri, United States of America
- NeuroGenomics and Informatics Center, Washington University, St. Louis, Missouri, United States of America
| | - Albert A. Davis
- Department of Neurology, Washington University, St. Louis, Missouri, United States of America
- Hope Center for Neurological Disorders, Washington University, St. Louis, Missouri, United States of America
| | - John C. Morris
- The Charles F. and Joanne Knight Alzheimer Disease Research Center, Washington University, St. Louis, Missouri, United States of America
- Department of Neurology, Washington University, St. Louis, Missouri, United States of America
- Hope Center for Neurological Disorders, Washington University, St. Louis, Missouri, United States of America
| | - Celeste M. Karch
- Department of Psychiatry, Washington University, Saint Louis, St. Louis, Missouri, United States of America
- The Charles F. and Joanne Knight Alzheimer Disease Research Center, Washington University, St. Louis, Missouri, United States of America
- NeuroGenomics and Informatics Center, Washington University, St. Louis, Missouri, United States of America
- Hope Center for Neurological Disorders, Washington University, St. Louis, Missouri, United States of America
| | - Richard J. Perrin
- The Charles F. and Joanne Knight Alzheimer Disease Research Center, Washington University, St. Louis, Missouri, United States of America
- Department of Neurology, Washington University, St. Louis, Missouri, United States of America
- Hope Center for Neurological Disorders, Washington University, St. Louis, Missouri, United States of America
- Department of Pathology and Immunology, Washington University, St. Louis, Missouri, United States of America
| | - Bruno A. Benitez
- Department of Neurology and Neuroscience, Harvard Medical School and Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Oscar Harari
- Department of Psychiatry, Washington University, Saint Louis, St. Louis, Missouri, United States of America
- The Charles F. and Joanne Knight Alzheimer Disease Research Center, Washington University, St. Louis, Missouri, United States of America
- Hope Center for Neurological Disorders, Washington University, St. Louis, Missouri, United States of America
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8
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Sutter J, Brettschneider J, Wigdahl B, Bruggeman PJ, Krebs FC, Miller V. Non-Thermal Plasma Reduces HSV-1 Infection of and Replication in HaCaT Keratinocytes In Vitro. Int J Mol Sci 2024; 25:3839. [PMID: 38612649 PMCID: PMC11011387 DOI: 10.3390/ijms25073839] [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] [Received: 02/26/2024] [Revised: 03/23/2024] [Accepted: 03/26/2024] [Indexed: 04/14/2024] Open
Abstract
Herpes simplex virus type 1 (HSV-1) is a lifelong pathogen characterized by asymptomatic latent infection in the trigeminal ganglia (TG), with periodic outbreaks of cold sores caused by virus reactivation in the TG and subsequent replication in the oral mucosa. While antiviral therapies can provide relief from cold sores, they are unable to eliminate HSV-1. We provide experimental results that highlight non-thermal plasma (NTP) as a new alternative therapy for HSV-1 infection that would resolve cold sores faster and reduce the establishment of latent infection in the TG. Additionally, this study is the first to explore the use of NTP as a therapy that can both treat and prevent human viral infections. The antiviral effect of NTP was investigated using an in vitro model of HSV-1 epithelial infection that involved the application of NTP from two separate devices to cell-free HSV-1, HSV-1-infected cells, and uninfected cells. It was found that NTP reduced the infectivity of cell-free HSV-1, reduced viral replication in HSV-1-infected cells, and diminished the susceptibility of uninfected cells to HSV-1 infection. This triad of antiviral mechanisms of action suggests the potential of NTP as a therapeutic agent effective against HSV-1 infection.
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Affiliation(s)
- Julia Sutter
- Center for Molecular Virology and Gene Therapy, Institute for Molecular Medicine and Infectious Disease, Drexel University College of Medicine, Philadelphia, PA 19102, USA; (J.S.); (J.B.); (B.W.); (F.C.K.)
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA 19102, USA
| | - Jascha Brettschneider
- Center for Molecular Virology and Gene Therapy, Institute for Molecular Medicine and Infectious Disease, Drexel University College of Medicine, Philadelphia, PA 19102, USA; (J.S.); (J.B.); (B.W.); (F.C.K.)
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA 19102, USA
| | - Brian Wigdahl
- Center for Molecular Virology and Gene Therapy, Institute for Molecular Medicine and Infectious Disease, Drexel University College of Medicine, Philadelphia, PA 19102, USA; (J.S.); (J.B.); (B.W.); (F.C.K.)
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA 19102, USA
- Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Peter J. Bruggeman
- Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USA;
| | - Fred C. Krebs
- Center for Molecular Virology and Gene Therapy, Institute for Molecular Medicine and Infectious Disease, Drexel University College of Medicine, Philadelphia, PA 19102, USA; (J.S.); (J.B.); (B.W.); (F.C.K.)
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA 19102, USA
| | - Vandana Miller
- Center for Molecular Virology and Gene Therapy, Institute for Molecular Medicine and Infectious Disease, Drexel University College of Medicine, Philadelphia, PA 19102, USA; (J.S.); (J.B.); (B.W.); (F.C.K.)
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA 19102, USA
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9
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Giorgi C, Lombardozzi G, Ammannito F, Scenna MS, Maceroni E, Quintiliani M, d’Angelo M, Cimini A, Castelli V. Brain Organoids: A Game-Changer for Drug Testing. Pharmaceutics 2024; 16:443. [PMID: 38675104 PMCID: PMC11054008 DOI: 10.3390/pharmaceutics16040443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 03/12/2024] [Accepted: 03/20/2024] [Indexed: 04/28/2024] Open
Abstract
Neurological disorders are the second cause of death and the leading cause of disability worldwide. Unfortunately, no cure exists for these disorders, but the actual therapies are only able to ameliorate people's quality of life. Thus, there is an urgent need to test potential therapeutic approaches. Brain organoids are a possible valuable tool in the study of the brain, due to their ability to reproduce different brain regions and maturation stages; they can be used also as a tool for disease modelling and target identification of neurological disorders. Recently, brain organoids have been used in drug-screening processes, even if there are several limitations to overcome. This review focuses on the description of brain organoid development and drug-screening processes, discussing the advantages, challenges, and limitations of the use of organoids in modeling neurological diseases. We also highlighted the potential of testing novel therapeutic approaches. Finally, we examine the challenges and future directions to improve the drug-screening process.
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Affiliation(s)
| | | | | | | | | | | | | | - Annamaria Cimini
- Department of Life, Health and Environmental Science, University of L’Aquila, 67100 L’Aquila, Italy; (C.G.); (G.L.); (F.A.); (M.S.S.); (E.M.); (M.Q.); (M.d.)
| | - Vanessa Castelli
- Department of Life, Health and Environmental Science, University of L’Aquila, 67100 L’Aquila, Italy; (C.G.); (G.L.); (F.A.); (M.S.S.); (E.M.); (M.Q.); (M.d.)
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10
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Rippee-Brooks MD, Wu W, Dong J, Pappolla M, Fang X, Bao X. Viral Infections, Are They a Trigger and Risk Factor of Alzheimer's Disease? Pathogens 2024; 13:240. [PMID: 38535583 PMCID: PMC10974111 DOI: 10.3390/pathogens13030240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 03/02/2024] [Accepted: 03/07/2024] [Indexed: 04/01/2024] Open
Abstract
Alzheimer's Disease (AD), a progressive and debilitating condition, is reported to be the most common type of dementia, with at least 55 million people believed to be currently affected. Many causation hypotheses of AD exist, yet the intriguing link between viral infection and its possible contribution to the known etiology of AD has become an attractive focal point of research for the field and a challenging study task. In this review, we will explore the historical perspective and milestones that led the field to investigate the viral connection to AD. Specifically, several viruses such as Herpes Simplex Virus 1 (HSV-1), Zika virus (ZIKV), and severe cute respiratory syndrome coronavirus 2 (SARS-CoV-2), along with several others mentioned, include the various viruses presently considered within the field. We delve into the strong evidence implicating these viruses in the development of AD such as the lytic replication and axonal transport of HSV-1, the various mechanisms of ZIKV neurotropism through the human protein Musashi-1 (MSI1), and the spread of SARS-CoV-2 through the transfer of the virus through the BBB endothelial cells to glial cells and then to neurons via transsynaptic transfer. We will also explore beyond these mere associations by carefully analyzing the potential mechanisms by which these viruses may contribute to AD pathology. This includes but is not limited to direct neuronal infections, the dysregulation of immune responses, and the impact on protein processing (Aβ42 and hyperphosphorylated tau). Controversies and challenges of the virus-AD relationship emerge as we tease out these potential mechanisms. Looking forward, we emphasize future directions, such as distinct questions and proposed experimentations to explore, that the field should take to tackle the remaining unanswered questions and the glaring research gaps that persist. Overall, this review aims to provide a comprehensive survey of the past, present, and future of the potential link between viral infections and their association with AD development while encouraging further discussion.
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Affiliation(s)
- Meagan D. Rippee-Brooks
- Microbiology and Immunology Graduate Program, Department of Microbiology and Immunology, The University of Texas Medical Branch, Galveston, TX 77550, USA
| | - Wenzhe Wu
- Department of Pediatrics, The University of Texas Medical Branch, Galveston, TX 77550, USA
| | - Jianli Dong
- Department of Pathology, The University of Texas Medical Branch, Galveston, TX 77550, USA
| | - Miguel Pappolla
- Department of Neurology and Mitchell Center for Neurodegenerative Diseases, The University of Texas Medical Branch, Galveston, TX 77550, USA
| | - Xiang Fang
- Department of Neurology and Mitchell Center for Neurodegenerative Diseases, The University of Texas Medical Branch, Galveston, TX 77550, USA
| | - Xiaoyong Bao
- Microbiology and Immunology Graduate Program, Department of Microbiology and Immunology, The University of Texas Medical Branch, Galveston, TX 77550, USA
- Department of Pediatrics, The University of Texas Medical Branch, Galveston, TX 77550, USA
- The Institute of Translational Sciences, The University of Texas Medical Branch, Galveston, TX 77550, USA
- The Institute for Human Infections and Immunity, The University of Texas Medical Branch, Galveston, TX 77550, USA
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11
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Green RE, Sudre CH, Warren‐Gash C, Butt J, Waterboer T, Hughes AD, Schott JM, Richards M, Chaturvedi N, Williams DM. Common infections and neuroimaging markers of dementia in three UK cohort studies. Alzheimers Dement 2024; 20:2128-2142. [PMID: 38248636 PMCID: PMC10984486 DOI: 10.1002/alz.13613] [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: 07/20/2023] [Revised: 10/13/2023] [Accepted: 11/25/2023] [Indexed: 01/23/2024]
Abstract
INTRODUCTION We aimed to investigate associations between common infections and neuroimaging markers of dementia risk (brain volume, hippocampal volume, white matter lesions) across three population-based studies. METHODS We tested associations between serology measures (pathogen serostatus, cumulative burden, continuous antibody responses) and outcomes using linear regression, including adjustments for total intracranial volume and scanner/clinic information (basic model), age, sex, ethnicity, education, socioeconomic position, alcohol, body mass index, and smoking (fully adjusted model). Interactions between serology measures and apolipoprotein E (APOE) genotype were tested. Findings were meta-analyzed across cohorts (Nmain = 2632; NAPOE-interaction = 1810). RESULTS Seropositivity to John Cunningham virus associated with smaller brain volumes in basic models (β = -3.89 mL [-5.81, -1.97], Padjusted < 0.05); these were largely attenuated in fully adjusted models (β = -1.59 mL [-3.55, 0.36], P = 0.11). No other relationships were robust to multiple testing corrections and sensitivity analyses, but several suggestive associations were observed. DISCUSSION We did not find clear evidence for relationships between common infections and markers of dementia risk. Some suggestive findings warrant testing for replication.
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Affiliation(s)
- Rebecca E. Green
- MRC Unit for Lifelong Health & Ageing at UCLUniversity College LondonLondonUK
| | - Carole H. Sudre
- MRC Unit for Lifelong Health & Ageing at UCLUniversity College LondonLondonUK
- Dementia Research CentreUCL Queen Square Institute of NeurologyLondonUK
- School of Biomedical Engineering and Imaging SciencesKing's College LondonLondonUK
- Department of Medical Physics and Biomedical EngineeringCentre for Medical Image Computing (CMIC)University College London (UCL)LondonUK
| | - Charlotte Warren‐Gash
- Faculty of Epidemiology and Population HealthLondon School of Hygiene and Tropical MedicineLondonUK
| | - Julia Butt
- Division of Infections and Cancer EpidemiologyGerman Cancer Research Center (DKFZ)HeidelbergGermany
| | - Tim Waterboer
- Division of Infections and Cancer EpidemiologyGerman Cancer Research Center (DKFZ)HeidelbergGermany
| | - Alun D. Hughes
- MRC Unit for Lifelong Health & Ageing at UCLUniversity College LondonLondonUK
| | | | - Marcus Richards
- MRC Unit for Lifelong Health & Ageing at UCLUniversity College LondonLondonUK
| | - Nish Chaturvedi
- MRC Unit for Lifelong Health & Ageing at UCLUniversity College LondonLondonUK
| | - Dylan M. Williams
- MRC Unit for Lifelong Health & Ageing at UCLUniversity College LondonLondonUK
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12
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Li Z, Wang H, Yin Y. Peripheral inflammation is a potential etiological factor in Alzheimer's disease. Rev Neurosci 2024; 35:99-120. [PMID: 37602685 DOI: 10.1515/revneuro-2023-0049] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 07/27/2023] [Indexed: 08/22/2023]
Abstract
Peripheral inflammation could constitute a risk factor for AD. This review summarizes the research related to peripheral inflammation that appears to have a relationship with Alzheimer's disease. We find there are significant associations between AD and peripheral infection induced by various pathogens, including herpes simplex virus type 1, cytomegalovirus, Epstein-Barr virus, human immunodeficiency virus, severe acute respiratory syndrome coronavirus 2, Porphyromonas gingivalis, Helicobacter pylori, and Toxoplasma gondii. Chronic inflammatory diseases are also reported to contribute to the pathophysiology of AD. The mechanisms by which peripheral inflammation affects the pathophysiology of AD are complex. Pathogen-derived neurotoxic molecule composition, disrupted BBB, and dysfunctional neurogenesis may all play a role in peripheral inflammation, promoting the development of AD. Anti-pathogenic medications and anti-inflammatory treatments are reported to decrease the risk of AD. Studies that could improve understanding the associations between AD and peripheral inflammation are needed. If our assumption is correct, early intervention against inflammation may be a potential method of preventing and treating AD.
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Affiliation(s)
- Ziyuan Li
- Department of Nuclear Medicine, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Kongjiang Road 1665, Yangpu District, Shanghai 200092, China
| | - Hui Wang
- Department of Nuclear Medicine, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Kongjiang Road 1665, Yangpu District, Shanghai 200092, China
| | - Yafu Yin
- Department of Nuclear Medicine, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Kongjiang Road 1665, Yangpu District, Shanghai 200092, China
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13
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Zhao M, Ma G, Yan X, Li X, Wang E, Xu XX, Zhao JB, Ma X, Zeng J. Microbial infection promotes amyloid pathology in a mouse model of Alzheimer's disease via modulating γ-secretase. Mol Psychiatry 2024:10.1038/s41380-024-02428-5. [PMID: 38273109 DOI: 10.1038/s41380-024-02428-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 12/20/2023] [Accepted: 01/10/2024] [Indexed: 01/27/2024]
Abstract
Microbial infection as a type of environmental risk factors is considered to be associated with long-term increased risk of dementia, including Alzheimer's disease (AD). AD is characterized by two neuropathologically molecular hallmarks of hyperphosphorylated tau and amyloid-β (Aβ), the latter generated by several biochemically reactive enzymes, including γ-secretase. However, how infectious risk factors contribute to pathological development of the AD core molecules remains to be addressed. In this work, we utilized a modified herpes simplex virus type 1 (mHSV-1) and found that its hippocampal infection locally promotes Aβ pathology in 5 × FAD mice, the commonly used amyloid model. Mechanistically, we identified HSV-1 membrane glycoprotein US7 (Envelope gI) that interacts with and modulates γ-secretase and consequently facilitates Aβ production. Furthermore, we presented evidence that adenovirus-associated virus-mediated locally hippocampal overexpression of the US7 aggravates Aβ pathology in 5 × FAD mice. Collectively, these findings identify a herpesviral factor regulating γ-secretase in the development and progression of AD and represent a causal molecular link between infectious pathogens and neurodegeneration.
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Affiliation(s)
- Meng Zhao
- Songjiang Research Institute, Songjiang Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 201600, China
- Department of Neurology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, 150001, Heilongjiang, China
| | - Guanqin Ma
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, Yunnan, China
| | - Xiaoxu Yan
- Songjiang Research Institute, Songjiang Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 201600, China
- Department of Neurology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, 150001, Heilongjiang, China
| | - Xiaohong Li
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
| | - Erlin Wang
- Songjiang Research Institute, Songjiang Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 201600, China
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
| | - Xiang-Xiong Xu
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, Yunnan, China
| | - Jie-Bin Zhao
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, Yunnan, China
| | - Xueling Ma
- Department of Neurology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, 150001, Heilongjiang, China.
| | - Jianxiong Zeng
- Songjiang Research Institute, Songjiang Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 201600, China.
- Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China.
- Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, Yunnan, China.
- Yunnan Key Laboratory of Biodiversity Information, Kunming, 650201, Yunnan, China.
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14
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Wang Y, Tang Y, Liu TH, Shao L, Li C, Wang Y, Tan P. Integrative Multi-omics Analysis to Characterize Herpes Virus Infection Increases the Risk of Alzheimer's Disease. Mol Neurobiol 2024:10.1007/s12035-023-03903-w. [PMID: 38191694 DOI: 10.1007/s12035-023-03903-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 12/22/2023] [Indexed: 01/10/2024]
Abstract
Evidence suggests that herpes virus infection is associated with an increased risk of Alzheimer's disease (AD), and innate and adaptive immunity plays an important role in the association. Although there have been many studies, the mechanism of the association is still unclear. This study aims to reveal the underlying molecular and immune regulatory network through multi-omics data and provide support for the study of the mechanism of infection and AD in the future. Here, we found that the herpes virus infection significantly increased the risk of AD. Genes associated with the occurrence and development of AD and genetically regulated by herpes virus infection are mainly enrichment in immune-related pathways. The 22 key regulatory genes identified by machine learning are mainly immune genes. They are also significantly related to the infiltration changes of 3 immune cell in AD. Furthermore, many of these genes have previously been reported to be linked, or potentially linked, to the pathological mechanisms of both herpes virus infection and AD. In conclusion, this study contributes to the study of the mechanisms related to herpes virus infection and AD, and indicates that the regulation of innate and adaptive immunity may be an effective strategy for preventing and treating herpes virus infection and AD. Additionally, the identified key regulatory genes, whether previously studied or newly discovered, may serve as valuable targets for prevention and treatment strategies.
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Affiliation(s)
- Yongheng Wang
- Department of Bioinformatics, School of Basic Medicine, Chongqing Medical University, Chongqing, China
- Joint International Research Laboratory of Reproductive and Development, Department of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, China
| | - Yaqin Tang
- Department of Bioinformatics, School of Basic Medicine, Chongqing Medical University, Chongqing, China
| | - Tai-Hang Liu
- Department of Bioinformatics, School of Basic Medicine, Chongqing Medical University, Chongqing, China
- Joint International Research Laboratory of Reproductive and Development, Department of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, China
| | - Lizhen Shao
- Department of Bioinformatics, School of Basic Medicine, Chongqing Medical University, Chongqing, China
| | - Chunying Li
- Chongqing Vocational College of Resources and Environmental Protection, Chongqing, China.
| | - Yingxiong Wang
- Joint International Research Laboratory of Reproductive and Development, Department of Reproductive Biology, School of Public Health, Chongqing Medical University, Chongqing, China.
| | - Pengcheng Tan
- Department of Bioinformatics, School of Basic Medicine, Chongqing Medical University, Chongqing, China.
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15
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Gurjar P, Khan AA, Alanazi AM, Vasil'ev VG, Zouganelis G, Alexiou A. Molecular Dissection of Herpes Simplex Virus Type 1 to Elucidate Molecular Mechanisms Behind Latency and Comparison of Its Codon Usage Patterns with Genes Modulated During Alzheimer's Disease as a Part of Host-Pathogen Interaction. J Alzheimers Dis 2024; 97:1111-1123. [PMID: 38306057 DOI: 10.3233/jad-231083] [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: 02/03/2024]
Abstract
BACKGROUND Herpes simplex virus type 1 (HSV-1) is associated with Alzheimer's disease, which goes into a cycle of latency and reactivation. The present study was envisaged to understand the reasons for latency and specific molecular patterns present in the HSV-1. OBJECTIVE The objective is the molecular dissection of Herpes simplex virus type 1 to elucidate molecular mechanisms behind latency and compare its codon usage patterns with genes modulated during Alzheimer's disease as a part of host-pathogen interaction. METHODS In the present study, we tried to investigate the potential reasons for the latency of HSV-1 virus bioinformatically by determining the CpG patterns. Also, we investigated the codon usage pattern, the presence of rare codons, codon context, and protein properties. RESULTS The top 222 codon pairs graded based on their frequency in the HSV-1 genome revealed that with only one exception (CUG-UUU), all other codon pairs have codons ending with G/C. Considering it an extension of host-pathogen interaction, we compared HSV-1 codon usage with that of codon usage of genes modulated during Alzheimer's disease, and we found that CGT and TTT are only two codons that exhibited similar codon usage patterns and other codons showed statistically highly significant different codon preferences. Dinucleotide CpG tends to mutate to TpG, suggesting the presence of mutational forces and the imperative role of CpG methylation in HSV-1 latency. CONCLUSIONS Upon comparison of codon usage between HSV-1 and Alzheimer's disease genes, no similarities in codon usage were found as a part of host-pathogen interaction. CpG methylation plays an imperative role in latency HSV-1.
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Affiliation(s)
- Pankaj Gurjar
- Centre for Global Health Research, Saveetha Medical College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India
- Department of Science and Engineering, Novel Global Community Educational Foundation, Hebersham, Australia
| | - Azmat Ali Khan
- Department of Pharmaceutical Chemistry, Pharmaceutical Biotechnology Laboratory, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Amer M Alanazi
- Department of Pharmaceutical Chemistry, Pharmaceutical Biotechnology Laboratory, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | | | - George Zouganelis
- School of Human Sciences, College of Life and Natural Sciences, University of Derby, Derby, UK
| | - Athanasios Alexiou
- Department of Science and Engineering, Novel Global Community Educational Foundation, Hebersham, Australia
- AFNP Med, Vienna, Austria
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16
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Hussain MS, Gupta G, Samuel VP, Almalki WH, Kazmi I, Alzarea SI, Saleem S, Khan R, Altwaijry N, Patel S, Patel A, Singh SK, Dua K. Immunopathology of herpes simplex virus-associated neuroinflammation: Unveiling the mysteries. Rev Med Virol 2024; 34:e2491. [PMID: 37985599 DOI: 10.1002/rmv.2491] [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] [Received: 10/04/2023] [Revised: 10/21/2023] [Accepted: 11/03/2023] [Indexed: 11/22/2023]
Abstract
The immunopathology of herpes simplex virus (HSV)-associated neuroinflammation is a captivating and intricate field of study within the scientific community. HSV, renowned for its latent infection capability, gives rise to a spectrum of neurological expressions, ranging from mild symptoms to severe encephalitis. The enigmatic interplay between the virus and the host's immune responses profoundly shapes the outcome of these infections. This review delves into the multifaceted immune reactions triggered by HSV within neural tissues, intricately encompassing the interplay between innate and adaptive immunity. Furthermore, this analysis delves into the delicate equilibrium between immune defence and the potential for immunopathology-induced neural damage. It meticulously dissects the roles of diverse immune cells, cytokines, and chemokines, unravelling the intricacies of neuroinflammation modulation and its subsequent effects. By exploring HSV's immune manipulation and exploitation mechanisms, this review endeavours to unveil the enigmas surrounding the immunopathology of HSV-associated neuroinflammation. This comprehensive understanding enhances our grasp of viral pathogenesis and holds promise for pioneering therapeutic strategies designed to mitigate the neurological ramifications of HSV infections.
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Affiliation(s)
- Md Sadique Hussain
- School of Pharmaceutical Sciences, Jaipur National University, Jaipur, Rajasthan, India
| | - Gaurav Gupta
- Centre for Global Health Research, Saveetha Medical College, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Kuthambakkam, India
- School of Pharmacy, Graphic Era Hill University, Dehradun, India
- School of Pharmacy, Suresh Gyan Vihar University, Jaipur, India
| | - Vijaya Paul Samuel
- Department of Anatomy, RAK College of Medicine, RAK Medical and Health Sciences, Ras Al Khaimah, United Arab Emirates
| | - Waleed Hassan Almalki
- Department of Pharmacology, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Imran Kazmi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Sami I Alzarea
- Department of Pharmacology, College of Pharmacy, Jouf University, Sakaka, Al-Jouf, Saudi Arabia
| | - Shakir Saleem
- Department of Public Health, College of Health Sciences, Saudi Electronic University, Riyadh, Saudi Arabia
| | - Ruqaiyah Khan
- Department of Basic Health Sciences, Deanship of Preparatory Year for the Health Colleges, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Najla Altwaijry
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Samir Patel
- Department of Pharmaceutical Chemistry and Analysis, Ramanbhai Patel College of Pharmacy, Charotar University of Science and Technology, Changa, Gujarat, India
| | - Archita Patel
- Department of Pharmaceutical Chemistry and Analysis, Ramanbhai Patel College of Pharmacy, Charotar University of Science and Technology, Changa, Gujarat, India
| | - Sachin Kumar Singh
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab, India
- Faculty of Health, Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, Australia
| | - Kamal Dua
- Faculty of Health, Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, Australia
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, Broadway, New South Wales, Australia
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17
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McKay TB, Khawaja ZQ, Freedman IG, Turco I, Wiredu K, Colecchi T, Akeju O. Exploring the Pathophysiology of Delirium: An Overview of Biomarker Studies, Animal Models, and Tissue-Engineered Models. Anesth Analg 2023; 137:1186-1197. [PMID: 37851904 PMCID: PMC10840625 DOI: 10.1213/ane.0000000000006715] [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: 10/20/2023]
Abstract
Delirium is an acute brain disorder associated with disorganized thinking, difficulty focusing, and confusion that commonly follows major surgery, severe infection, and illness. Older patients are at high risk for developing delirium during hospitalization, which may contribute to increased morbidity, longer hospitalization, and increased risk of institutionalization following discharge. The pathophysiology underlying delirium remains poorly studied. This review delves into the findings from biomarker studies and animal models, and highlights the potential for tissue-engineered models of the brain in studying this condition. The aim is to bring together the existing knowledge in the field and provide insight into the future direction of delirium research.
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Affiliation(s)
- Tina B. McKay
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Zain Q. Khawaja
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Isaac G. Freedman
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Isabella Turco
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Kwame Wiredu
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Talia Colecchi
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Oluwaseun Akeju
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA
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18
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Phuna ZX, Madhavan P. A reappraisal on amyloid cascade hypothesis: the role of chronic infection in Alzheimer's disease. Int J Neurosci 2023; 133:1071-1089. [PMID: 35282779 DOI: 10.1080/00207454.2022.2045290] [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] [Received: 09/01/2020] [Accepted: 02/09/2022] [Indexed: 10/18/2022]
Abstract
Alzheimer disease (AD) is a progressive neurological disorder that accounted for the most common cause of dementia in the elderly population. Lately, 'infection hypothesis' has been proposed where the infection of microbes can lead to the pathogenesis of AD. Among different types of microbes, human immunodeficiency virus-1 (HIV-1), herpes simplex virus-1 (HSV-1), Chlamydia pneumonia, Spirochetes and Candida albicans are frequently detected in the brain of AD patients. Amyloid-beta protein has demonstrated to exhibit antimicrobial properties upon encountering these pathogens. It can bind to microglial cells and astrocytes to activate immune response and neuroinflammation. Nevertheless, HIV-1 and HSV-1 can develop into latency whereas Chlamydia pneumonia, Spirochetes and Candida albicans can cause chronic infections. At this stage, the DNA of microbes remains undetectable yet active. This can act as the prolonged pathogenic stimulus that over-triggers the expression of Aβ-related genes, which subsequently lead to overproduction and deposition of Aβ plaque. This review will highlight the pathogenesis of each of the stated microbial infection, their association in AD pathogenesis as well as the effect of chronic infection in AD progression. Potential therapies for AD by modulating the microbiome have also been suggested. This review will aid in understanding the infectious manifestations of AD.
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Affiliation(s)
- Zhi Xin Phuna
- School of Medicine, Faculty of Health and Medical Sciences, Taylor's University, Selangor, Malaysia
| | - Priya Madhavan
- School of Medicine, Faculty of Health and Medical Sciences, Taylor's University, Selangor, Malaysia
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19
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Giri R, Bhardwaj T, Kapuganti SK, Saumya KU, Sharma N, Bhardwaj A, Joshi R, Verma D, Gadhave K. Widespread amyloid aggregates formation by Zika virus proteins and peptides. Protein Sci 2023; 32:e4833. [PMID: 37937856 PMCID: PMC10682691 DOI: 10.1002/pro.4833] [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: 08/28/2023] [Revised: 11/01/2023] [Accepted: 11/05/2023] [Indexed: 11/09/2023]
Abstract
Viral pathogenesis typically involves numerous molecular mechanisms. Protein aggregation is a relatively unknown characteristic of viruses, despite the fact that viral proteins have been shown to form terminally misfolded forms. Zika virus (ZIKV) is a neurotropic one with the potential to cause neurodegeneration. Its protein amyloid aggregation may link the neurodegenerative component to the pathogenicity associated with the viral infection. Therefore, we investigated protein aggregation in the ZIKV proteome as a putative pathogenic route and one of the alternate pathways. We discovered that it contains numerous anticipated aggregation-prone regions in this investigation. To validate our prediction, we used a combination of supporting experimental techniques routinely used for morphological characterization and study of amyloid aggregates. Several ZIKV proteins and peptides, including the full-length envelope protein, its domain III (EDIII) and fusion peptide, Pr N-terminal peptide, NS1 β-roll peptide, membrane-embedded signal peptide 2K, and cytosolic region of NS4B protein, were shown to be highly aggregating in our study. Because our findings show that viral proteins can form amyloids in vitro, we need to do a thorough functional study of these anticipated APRs to understand better the role of amyloids in the pathophysiology of ZIKV infection.
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Affiliation(s)
- Rajanish Giri
- School of Biosciences and BioengineeringIndian Institute of Technology MandiKamandHimachal PradeshIndia
| | - Taniya Bhardwaj
- School of Biosciences and BioengineeringIndian Institute of Technology MandiKamandHimachal PradeshIndia
| | - Shivani K. Kapuganti
- School of Biosciences and BioengineeringIndian Institute of Technology MandiKamandHimachal PradeshIndia
| | - Kumar Udit Saumya
- School of Biosciences and BioengineeringIndian Institute of Technology MandiKamandHimachal PradeshIndia
| | - Nitin Sharma
- Department of Pathology and ImmunologyWashington University School of MedicineSt. LouisMissouriUSA
| | - Aparna Bhardwaj
- School of Biosciences and BioengineeringIndian Institute of Technology MandiKamandHimachal PradeshIndia
| | - Richa Joshi
- School of Biosciences and BioengineeringIndian Institute of Technology MandiKamandHimachal PradeshIndia
| | - Deepanshu Verma
- School of Biosciences and BioengineeringIndian Institute of Technology MandiKamandHimachal PradeshIndia
| | - Kundlik Gadhave
- Department of NeurologyJohns Hopkins University School of MedicineBaltimoreMarylandUSA
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20
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Rowland H, Moxon S, Corbett N, Hanson K, Fisher K, Kellett K, Hooper N. Inhibition of insulin-degrading enzyme in human neurons promotes amyloid-β deposition. Neuronal Signal 2023; 7:NS20230016. [PMID: 37808160 PMCID: PMC10550784 DOI: 10.1042/ns20230016] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 08/23/2023] [Accepted: 08/24/2023] [Indexed: 10/10/2023] Open
Abstract
Alzheimer's disease (AD) is characterised by the aggregation and deposition of amyloid-β (Aβ) peptides in the human brain. In age-related late-onset AD, deficient degradation and clearance, rather than enhanced production, of Aβ contributes to disease pathology. In the present study, we assessed the contribution of the two key Aβ-degrading zinc metalloproteases, insulin-degrading enzyme (IDE) and neprilysin (NEP), to Aβ degradation in human induced pluripotent stem cell (iPSC)-derived cortical neurons. Using an Aβ fluorescence polarisation assay, inhibition of IDE but not of NEP, blocked the degradation of Aβ by human neurons. When the neurons were grown in a 3D extracellular matrix to visualise Aβ deposition, inhibition of IDE but not NEP, increased the number of Aβ deposits. The resulting Aβ deposits were stained with the conformation-dependent, anti-amyloid antibodies A11 and OC that recognise Aβ aggregates in the human AD brain. Inhibition of the Aβ-forming β-secretase prevented the formation of the IDE-inhibited Aβ deposits. These data indicate that inhibition of IDE in live human neurons grown in a 3D matrix increased the deposition of Aβ derived from the proteolytic cleavage of the amyloid precursor protein. This work has implications for strategies aimed at enhancing IDE activity to promote Aβ degradation in AD.
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Affiliation(s)
- Helen A. Rowland
- Division of Neuroscience, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, M13 9PT, Manchester, U.K
| | - Samuel R. Moxon
- Division of Neuroscience, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, M13 9PT, Manchester, U.K
| | - Nicola J. Corbett
- Division of Neuroscience, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, M13 9PT, Manchester, U.K
| | - Kelsey Hanson
- Division of Neuroscience, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, M13 9PT, Manchester, U.K
| | - Kate Fisher
- Division of Neuroscience, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, M13 9PT, Manchester, U.K
| | - Katherine A.B. Kellett
- Division of Neuroscience, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, M13 9PT, Manchester, U.K
| | - Nigel M. Hooper
- Division of Neuroscience, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, M13 9PT, Manchester, U.K
- Geoffrey Jefferson Brain Research Centre, Manchester Academic Health Science Centre, Northern Care Alliance and University of Manchester, Manchester, U.K
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21
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Webber CJ, Murphy CN, Rondón-Ortiz AN, van der Spek SJF, Kelly EX, Lampl NM, Chiesa G, Khalil AS, Emili A, Wolozin B. Human herpesvirus 8 ORF57 protein is able to reduce TDP-43 pathology: network analysis identifies interacting pathways. Hum Mol Genet 2023; 32:2966-2980. [PMID: 37522762 PMCID: PMC10549787 DOI: 10.1093/hmg/ddad122] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 07/25/2023] [Accepted: 07/26/2023] [Indexed: 08/01/2023] Open
Abstract
Aggregation of TAR DNA-binding protein 43 kDa (TDP-43) is thought to drive the pathophysiology of amyotrophic lateral sclerosis and some frontotemporal dementias. TDP-43 is normally a nuclear protein that in neurons translocates to the cytoplasm and can form insoluble aggregates upon activation of the integrated stress response (ISR). Viruses evolved to control the ISR. In the case of Herpesvirus 8, the protein ORF57 acts to bind protein kinase R, inhibit phosphorylation of eIF2α and reduce activation of the ISR. We hypothesized that ORF57 might also possess the ability to inhibit aggregation of TDP-43. ORF57 was expressed in the neuronal SH-SY5Y line and its effects on TDP-43 aggregation characterized. We report that ORF57 inhibits TDP-43 aggregation by 55% and elicits a 2.45-fold increase in the rate of dispersion of existing TDP-43 granules. These changes were associated with a 50% decrease in cell death. Proteomic studies were carried out to identify the protein interaction network of ORF57. We observed that ORF57 directly binds to TDP-43 as well as interacts with many components of the ISR, including elements of the proteostasis machinery known to reduce TDP-43 aggregation. We propose that viral proteins designed to inhibit a chronic ISR can be engineered to remove aggregated proteins and dampen a chronic ISR.
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Affiliation(s)
- Chelsea J Webber
- Departments of Pharmacology, Physiology and Biophysics, Boston University, Boston, MA 02215, USA
| | - Caroline N Murphy
- Departments of Pharmacology, Physiology and Biophysics, Boston University, Boston, MA 02215, USA
| | - Alejandro N Rondón-Ortiz
- Departments of Pharmacology, Physiology and Biophysics, Boston University, Boston, MA 02215, USA
- Center for Network Systems Biology, Boston University, Boston, MA 02215, USA
- Department of Biology, Boston University, Boston, MA 02215, USA
| | - Sophie J F van der Spek
- Departments of Pharmacology, Physiology and Biophysics, Boston University, Boston, MA 02215, USA
| | - Elena X Kelly
- Departments of Pharmacology, Physiology and Biophysics, Boston University, Boston, MA 02215, USA
| | - Noah M Lampl
- Center for Network Systems Biology, Boston University, Boston, MA 02215, USA
| | - Giulio Chiesa
- Biological Design Center, Boston University, Boston, MA 02215, USA
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
| | - Ahmad S Khalil
- Biological Design Center, Boston University, Boston, MA 02215, USA
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Andrew Emili
- Center for Network Systems Biology, Boston University, Boston, MA 02215, USA
- Department of Biochemistry, Boston University, Boston, MA 02115, USA
- Department of Biochemistry, Oregon Health Sciences University, Portland, OR 97239, USA
| | - Benjamin Wolozin
- Departments of Pharmacology, Physiology and Biophysics, Boston University, Boston, MA 02215, USA
- Center for Systems Neuroscience, Boston University, Boston, MA 02115, USA
- Center for Neurophotonics, Boston University, Boston, MA 02115, USA
- Department of Neurology, Boston University, Boston, MA 02115, USA
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22
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Pauwels EK, Boer GJ. Friends and Foes in Alzheimer's Disease. Med Princ Pract 2023; 32:313-322. [PMID: 37788649 PMCID: PMC10727688 DOI: 10.1159/000534400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 10/01/2023] [Indexed: 10/05/2023] Open
Abstract
Alzheimer's disease (AD) is a disabling neurodegenerative disease. The prognosis is poor, and currently there are no proven effective therapies. Most likely, the etiology is related to cerebral inflammatory processes that cause neuronal damage, resulting in dysfunction and apoptosis of nerve cells. Pathogens that evoke a neuroinflammatory response, collectively activate astrocytes and microglia, which contributes to the secretion of pro-inflammatory cytokines. This leads to the deposit of clustered fragments of beta-amyloid and misfolded tau proteins which do not elicit an adequate immune reaction. Apart from the function of astrocytes and microglia, molecular entities such as TREM2, SYK, C22, and C33 play a role in the physiopathology of AD. Furthermore, bacteria and viruses may trigger an overactive inflammatory response in the brain. Pathogens like Helicobacter pylori, Chlamydia pneumonia, and Porphyromonas gingivalis (known for low-grade infection in the oral cavity) can release gingipains, which are enzymes that can damage and destroy neurons. Chronic infection with Borrelia burgdorferi (the causative agent of Lyme disease) can co-localize with tau tangles and amyloid deposits. As for viral infections, herpes simplex virus 1, cytomegalovirus, and Epstein-Barr virus can play a role in the pathogenesis of AD. Present investigations have resulted in the development of antibodies that can clear the brain of beta-amyloid plaques. Trials with humanized aducanumab, lecanemab, and donanemab revealed limited success in AD patients. However, AD should be considered as a continuum in which the initial preclinical phase may take 10 or even 20 years. It is generally thought that this phase offers a window for efficacious treatment. Therefore, research is also focused on the identification of biomarkers for early AD detection. In this respect, the plasma measurement of neurofilament light chain in patients treated with hydromethylthionine mesylate may well open a new way to prevent the formation of tau tangles and represents the first treatment for AD at its roots.
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Affiliation(s)
- Ernest K.J. Pauwels
- Leiden University and Leiden University Medical Center, Leiden, The Netherlands
| | - Gerard J. Boer
- Netherlands Institute for Brain Research, Royal Academy of Arts and Sciences, Amsterdam, The Netherlands
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23
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Feng S, Liu Y, Zhou Y, Shu Z, Cheng Z, Brenner C, Feng P. Mechanistic insights into the role of herpes simplex virus 1 in Alzheimer's disease. Front Aging Neurosci 2023; 15:1245904. [PMID: 37744399 PMCID: PMC10512732 DOI: 10.3389/fnagi.2023.1245904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 08/21/2023] [Indexed: 09/26/2023] Open
Abstract
Alzheimer's Disease (AD) is an aging-associated neurodegenerative disorder, threatening millions of people worldwide. The onset and progression of AD can be accelerated by environmental risk factors, such as bacterial and viral infections. Human herpesviruses are ubiquitous infectious agents that underpin numerous inflammatory disorders including neurodegenerative diseases. Published studies concerning human herpesviruses in AD imply an active role HSV-1 in the pathogenesis of AD. This review will summarize the current understanding of HSV-1 infection in AD and highlight some barriers to advance this emerging field.
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Affiliation(s)
- Shu Feng
- Department of Diabetes and Cancer Metabolism, City of Hope National Medical Center, Duarte, CA, United States
| | - Yongzhen Liu
- Section of Infection and Immunity, Herman Ostrow School of Dentistry, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, United States
| | - Yu Zhou
- Section of Infection and Immunity, Herman Ostrow School of Dentistry, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, United States
| | - Zhenfeng Shu
- Section of Infection and Immunity, Herman Ostrow School of Dentistry, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, United States
| | - Zhuxi Cheng
- Section of Infection and Immunity, Herman Ostrow School of Dentistry, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, United States
- International Department, Beijing Bayi School, Beijing, China
| | - Charles Brenner
- Department of Diabetes and Cancer Metabolism, City of Hope National Medical Center, Duarte, CA, United States
| | - Pinghui Feng
- Section of Infection and Immunity, Herman Ostrow School of Dentistry, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA, United States
- Department of Molecular Microbiology and Immunology, Norris Comprehensive Cancer Center, Los Angeles, CA, United States
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24
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Kamte YS, Chandwani MN, London NM, Potosnak CE, Leak RK, O'Donnell LA. Perturbations in neural stem cell function during a neurotropic viral infection in juvenile mice. J Neurochem 2023; 166:809-829. [PMID: 37530081 DOI: 10.1111/jnc.15914] [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] [Received: 03/17/2023] [Revised: 06/25/2023] [Accepted: 06/28/2023] [Indexed: 08/03/2023]
Abstract
Viral infections of the central nervous system (CNS) often cause worse neurological outcomes in younger hosts. Throughout childhood, the brain undergoes extensive development and refinement to produce functional neural networks. Network function is maintained partly with the help of neural stem cells (NSCs) that replace neuronal and glia subtypes in the two neurogenic niches of the brain (the hippocampus and subventricular zone). Accumulating evidence suggests that viruses disrupt NSC function in adulthood and infancy, but the in vivo impact of childhood infections on acute and long-term NSC function is unknown. Using a juvenile mouse model of measles virus (MeV) infection, where only mature neurons in the brain are infected, we defined the effects of the antiviral immune response on NSCs from juvenile to adult stages of life. We found that (a) virus persists in the brains of survivors despite an anti-viral immune response; (b) NSC numbers decrease dramatically during early infection, but ultimately stabilize in adult survivors; (c) infection is associated with mild apoptosis throughout the juvenile brain, but NSC proliferation is unchanged; (d) the loss of NSC numbers is dependent upon the stage of NSC differentiation; and (e) immature neurons increase early during infection, concurrent with depletion of NSC pools. Collectively, we show that NSCs are exquisitely sensitive to the inflammatory microenvironment created during neuron-restricted MeV infection in juveniles, responding with an early loss of NSCs but increased neurogenesis. These studies provide insight into potential cellular mechanisms associated with long-term neurological deficits in survivors of childhood CNS infections.
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Affiliation(s)
- Yashika S Kamte
- School of Pharmacy and the Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, Pennsylvania, USA
| | - Manisha N Chandwani
- School of Pharmacy and the Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, Pennsylvania, USA
| | - Natalie M London
- School of Pharmacy and the Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, Pennsylvania, USA
| | - Chloe E Potosnak
- School of Pharmacy and the Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, Pennsylvania, USA
| | - Rehana K Leak
- School of Pharmacy and the Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, Pennsylvania, USA
| | - Lauren A O'Donnell
- School of Pharmacy and the Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, Pennsylvania, USA
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25
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Piotrowski SL, Tucker A, Jacobson S. The elusive role of herpesviruses in Alzheimer's disease: current evidence and future directions. NEUROIMMUNE PHARMACOLOGY AND THERAPEUTICS 2023; 2:253-266. [PMID: 38013835 PMCID: PMC10474380 DOI: 10.1515/nipt-2023-0011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 06/26/2023] [Indexed: 11/29/2023]
Abstract
Alzheimer's disease (AD) is the most common cause of dementia. While pathologic hallmarks, such as extracellular beta-amyloid plaques, are well-characterized in affected individuals, the pathogenesis that causes plaque formation and eventual cognitive decline is not well understood. A recent resurgence of the decades-old "infectious hypothesis" has garnered increased attention on the potential role that microbes may play in AD. In this theory, it is thought that pathogens such as viruses may act as seeds for beta-amyloid aggregation, ultimately leading to plaques. Interest in the infectious hypothesis has also spurred further investigation into additional characteristics of viral infection that may play a role in AD progression, such as neuroinflammation, latency, and viral DNA integration. While a flurry of research in this area has been recently published, with herpesviruses being of particular interest, the role of pathogens in AD remains controversial. In this review, the insights gained thus far into the possible role of herpesviruses in AD are summarized. The challenges and potential future directions of herpesvirus research in AD and dementia are also discussed.
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Affiliation(s)
- Stacey L. Piotrowski
- Viral Immunology Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
- Comparative Biomedical Scientist Training Program, National Institutes of Health, Bethesda, MD, USA
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, IN, USA
| | - Allison Tucker
- Viral Immunology Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Steven Jacobson
- Viral Immunology Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
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26
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Adlakha YK. Human 3D brain organoids: steering the demolecularization of brain and neurological diseases. Cell Death Discov 2023; 9:221. [PMID: 37400464 DOI: 10.1038/s41420-023-01523-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 06/19/2023] [Accepted: 06/22/2023] [Indexed: 07/05/2023] Open
Abstract
Understanding of human brain development, dysfunction and neurological diseases has remained limited and challenging due to inability to recapitulate human brain-specific features in animal models. Though the anatomy and physiology of the human brain has been understood in a remarkable way using post-mortem, pathological samples of human and animal models, however, modeling of human brain development and neurological diseases remains a challenge owing to distinct complexity of human brain. In this perspective, three-dimensional (3D) brain organoids have shown a beam of light. Tremendous growth in stem cell technologies has permitted the differentiation of pluripotent stem cells under 3D culture conditions into brain organoids, which recapitulate the unique features of human brain in many ways and also offer the detailed investigation of brain development, dysfunction and neurological diseases. Their translational value has also emerged and will benefit the society once the protocols for the upscaling of brain organoids are in place. Here, we summarize new advancements in methods for generation of more complex brain organoids including vascularized and mixed lineage tissue from PSCs. How synthetic biomaterials and microfluidic technology is boosting brain organoid development, has also been highlighted. We discuss the applications of brain organoids in studying preterm birth associated brain dysfunction; viral infections mediated neuroinflammation, neurodevelopmental and neurodegenerative diseases. We also highlight the translational value of brain organoids and current challenges that the field is experiencing.
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Affiliation(s)
- Yogita K Adlakha
- Amity Institute of Molecular Medicine and Stem Cell Research, Amity University, Noida, Uttar Pradesh, India.
- Maternal and Child Health Domain, Translational Health Science and Technology Institute (THSTI), Faridabad, Haryana, India.
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27
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Fulop T, Ramassamy C, Lévesque S, Frost EH, Laurent B, Lacombe G, Khalil A, Larbi A, Hirokawa K, Desroches M, Rodrigues S, Bourgade K, Cohen AA, Witkowski JM. Viruses - a major cause of amyloid deposition in the brain. Expert Rev Neurother 2023; 23:775-790. [PMID: 37551672 DOI: 10.1080/14737175.2023.2244162] [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: 04/01/2023] [Accepted: 07/31/2023] [Indexed: 08/09/2023]
Abstract
INTRODUCTION Clinically, Alzheimer's disease (AD) is a syndrome with a spectrum of various cognitive disorders. There is a complete dissociation between the pathology and the clinical presentation. Therefore, we need a disruptive new approach to be able to prevent and treat AD. AREAS COVERED In this review, the authors extensively discuss the evidence why the amyloid beta is not the pathological cause of AD which makes therefore the amyloid hypothesis not sustainable anymore. They review the experimental evidence underlying the role of microbes, especially that of viruses, as a trigger/cause for the production of amyloid beta leading to the establishment of a chronic neuroinflammation as the mediator manifesting decades later by AD as a clinical spectrum. In this context, the emergence and consequences of the infection/antimicrobial protection hypothesis are described. The epidemiological and clinical data supporting this hypothesis are also analyzed. EXPERT OPINION For decades, we have known that viruses are involved in the pathogenesis of AD. This discovery was ignored and discarded for a long time. Now we should accept this fact, which is not a hypothesis anymore, and stimulate the research community to come up with new ideas, new treatments, and new concepts.
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Affiliation(s)
- Tamas Fulop
- Research Center on Aging, Centre Intégré Universitaire de Santé Et Services Sociaux de l'Estrie-Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
- Department of Medicine, Division of Geriatrics, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | | | - Simon Lévesque
- CIUSSS de l'Estrie - CHUS, Sherbrooke, QC, Canada
- Département de Microbiologie Et Infectiologie, Faculté de Médecine Et des Sciences de la santé, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Eric H Frost
- Département de Microbiologie Et Infectiologie, Faculté de Médecine Et des Sciences de la santé, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Benoit Laurent
- Research Center on Aging, Centre Intégré Universitaire de Santé Et Services Sociaux de l'Estrie-Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
- Department of Biochemistry and Functional Genomics, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Guy Lacombe
- Research Center on Aging, Centre Intégré Universitaire de Santé Et Services Sociaux de l'Estrie-Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
- Department of Medicine, Division of Geriatrics, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Abedelouahed Khalil
- Research Center on Aging, Centre Intégré Universitaire de Santé Et Services Sociaux de l'Estrie-Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
- Department of Medicine, Division of Geriatrics, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Anis Larbi
- Department of Medicine, Division of Geriatrics, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Katsuiku Hirokawa
- Department of Pathology, Institute of Health and Life Science, Tokyo Medical Dental University, Tokyo and Nito-Memory Nakanosogo Hospital, Tokyo, Japan
| | - Mathieu Desroches
- MathNeuro Team, Inria Sophia Antipolis Méditerranée, Biot, France
- Université Côte d'Azur, Nice, France
| | - Serafim Rodrigues
- Ikerbasque, BCAM, the Basque Foundation for Science and BCAM - The Basque Center for Applied Mathematics, Bilbao, Spain
| | - Karine Bourgade
- Research Center on Aging, Centre Intégré Universitaire de Santé Et Services Sociaux de l'Estrie-Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Alan A Cohen
- Department of Environmental Health Sciences, Butler Columbia Aging Center, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Jacek M Witkowski
- Department of Pathophysiology, Medical University of Gdansk, Gdansk, Poland
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28
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D'Antoni C, Mautone L, Sanchini C, Tondo L, Grassmann G, Cidonio G, Bezzi P, Cordella F, Di Angelantonio S. Unlocking Neural Function with 3D In Vitro Models: A Technical Review of Self-Assembled, Guided, and Bioprinted Brain Organoids and Their Applications in the Study of Neurodevelopmental and Neurodegenerative Disorders. Int J Mol Sci 2023; 24:10762. [PMID: 37445940 DOI: 10.3390/ijms241310762] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 06/18/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023] Open
Abstract
Understanding the complexities of the human brain and its associated disorders poses a significant challenge in neuroscience. Traditional research methods have limitations in replicating its intricacies, necessitating the development of in vitro models that can simulate its structure and function. Three-dimensional in vitro models, including organoids, cerebral organoids, bioprinted brain models, and functionalized brain organoids, offer promising platforms for studying human brain development, physiology, and disease. These models accurately replicate key aspects of human brain anatomy, gene expression, and cellular behavior, enabling drug discovery and toxicology studies while providing insights into human-specific phenomena not easily studied in animal models. The use of human-induced pluripotent stem cells has revolutionized the generation of 3D brain structures, with various techniques developed to generate specific brain regions. These advancements facilitate the study of brain structure development and function, overcoming previous limitations due to the scarcity of human brain samples. This technical review provides an overview of current 3D in vitro models of the human cortex, their development, characterization, and limitations, and explores the state of the art and future directions in the field, with a specific focus on their applications in studying neurodevelopmental and neurodegenerative disorders.
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Affiliation(s)
- Chiara D'Antoni
- Department of Physiology and Pharmacology, Sapienza University of Rome, 00185 Rome, Italy
- Center for Life Nano- and Neuro-Science of Istituto Italiano di Tecnologia (IIT), 00161 Rome, Italy
| | - Lorenza Mautone
- Department of Physiology and Pharmacology, Sapienza University of Rome, 00185 Rome, Italy
- Center for Life Nano- and Neuro-Science of Istituto Italiano di Tecnologia (IIT), 00161 Rome, Italy
| | - Caterina Sanchini
- Center for Life Nano- and Neuro-Science of Istituto Italiano di Tecnologia (IIT), 00161 Rome, Italy
| | - Lucrezia Tondo
- Department of Physiology and Pharmacology, Sapienza University of Rome, 00185 Rome, Italy
- Center for Life Nano- and Neuro-Science of Istituto Italiano di Tecnologia (IIT), 00161 Rome, Italy
| | - Greta Grassmann
- Center for Life Nano- and Neuro-Science of Istituto Italiano di Tecnologia (IIT), 00161 Rome, Italy
- Department of Biochemical Sciences "Alessandro Rossi Fanelli", Sapienza University of Rome, 00185 Rome, Italy
| | - Gianluca Cidonio
- Center for Life Nano- and Neuro-Science of Istituto Italiano di Tecnologia (IIT), 00161 Rome, Italy
| | - Paola Bezzi
- Department of Physiology and Pharmacology, Sapienza University of Rome, 00185 Rome, Italy
- Department of Fundamental Neurosciences, University of Lausanne, 1011 Lausanne, Switzerland
| | - Federica Cordella
- Department of Physiology and Pharmacology, Sapienza University of Rome, 00185 Rome, Italy
- Center for Life Nano- and Neuro-Science of Istituto Italiano di Tecnologia (IIT), 00161 Rome, Italy
| | - Silvia Di Angelantonio
- Department of Physiology and Pharmacology, Sapienza University of Rome, 00185 Rome, Italy
- Center for Life Nano- and Neuro-Science of Istituto Italiano di Tecnologia (IIT), 00161 Rome, Italy
- D-Tails s.r.l., 00165 Rome, Italy
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29
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Rybak-Wolf A, Wyler E, Pentimalli TM, Legnini I, Oliveras Martinez A, Glažar P, Loewa A, Kim SJ, Kaufer BB, Woehler A, Landthaler M, Rajewsky N. Modelling viral encephalitis caused by herpes simplex virus 1 infection in cerebral organoids. Nat Microbiol 2023:10.1038/s41564-023-01405-y. [PMID: 37349587 DOI: 10.1038/s41564-023-01405-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 05/10/2023] [Indexed: 06/24/2023]
Abstract
Herpes simplex encephalitis is a life-threatening disease of the central nervous system caused by herpes simplex viruses (HSVs). Following standard of care with antiviral acyclovir treatment, most patients still experience various neurological sequelae. Here we characterize HSV-1 infection of human brain organoids by combining single-cell RNA sequencing, electrophysiology and immunostaining. We observed strong perturbations of tissue integrity, neuronal function and cellular transcriptomes. Under acyclovir treatment viral replication was stopped, but did not prevent HSV-1-driven defects such as damage of neuronal processes and neuroepithelium. Unbiased analysis of pathways deregulated upon infection revealed tumour necrosis factor activation as a potential causal factor. Combination of anti-inflammatory drugs such as necrostatin-1 or bardoxolone methyl with antiviral treatment prevented the damages caused by infection, indicating that tuning the inflammatory response in acute infection may improve current therapeutic strategies.
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Affiliation(s)
- Agnieszka Rybak-Wolf
- Organoid Platform, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany.
| | - Emanuel Wyler
- Laboratory for RNA Biology, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
| | - Tancredi Massimo Pentimalli
- Laboratory for Systems Biology of Gene Regulatory Elements, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin School of Integrative Oncology (BSIO), Berlin, Germany
| | - Ivano Legnini
- Laboratory for Systems Biology of Gene Regulatory Elements, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
- Centre for Genomics, Functional Genomics Programme, Human Technopole, Milan, Italy
| | - Anna Oliveras Martinez
- System Biology Imaging Platform, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
| | - Petar Glažar
- Laboratory for Systems Biology of Gene Regulatory Elements, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
| | - Anna Loewa
- Organoid Platform, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
- Department of Infectious Diseases and Respiratory Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
| | - Seung Joon Kim
- Laboratory for Systems Biology of Gene Regulatory Elements, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK
| | | | - Andrew Woehler
- System Biology Imaging Platform, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
- Howard Hughes Medical Institute, Janelia Research Campus, Ashburn, VA, USA
| | - Markus Landthaler
- Laboratory for RNA Biology, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
- Institut für Biologie, Humboldt Universität zu Berlin, Berlin, Germany
| | - Nikolaus Rajewsky
- Laboratory for Systems Biology of Gene Regulatory Elements, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany.
- Charité-Universitätsmedizin, Berlin, Germany.
- German Center for Cardiovascular Research (DZHK), Site Berlin, Berlin, Germany.
- NeuroCure Cluster of Excellence, Berlin, Germany.
- German Cancer Consortium (DKTK), Berlin, Germany.
- National Center for Tumor Diseases (NCT), Site Berlin, Berlin, Germany.
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30
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Cerneckis J, Bu G, Shi Y. Pushing the boundaries of brain organoids to study Alzheimer's disease. Trends Mol Med 2023:S1471-4914(23)00098-9. [PMID: 37353408 PMCID: PMC10374393 DOI: 10.1016/j.molmed.2023.05.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 05/11/2023] [Accepted: 05/17/2023] [Indexed: 06/25/2023]
Abstract
Progression of Alzheimer's disease (AD) entails deterioration or aberrant function of multiple brain cell types, eventually leading to neurodegeneration and cognitive decline. Defining how complex cell-cell interactions become dysregulated in AD requires novel human cell-based in vitro platforms that could recapitulate the intricate cytoarchitecture and cell diversity of the human brain. Brain organoids (BOs) are 3D self-organizing tissues that partially resemble the human brain architecture and can recapitulate AD-relevant pathology. In this review, we highlight the versatile applications of different types of BOs to model AD pathogenesis, including amyloid-β and tau aggregation, neuroinflammation, myelin breakdown, vascular dysfunction, and other phenotypes, as well as to accelerate therapeutic development for AD.
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Affiliation(s)
- Jonas Cerneckis
- Department of Neurodegenerative Diseases, Beckman Research Institute of City of Hope, Duarte, CA 91010, USA; Irell and Manella Graduate School of Biological Sciences, Beckman Research Institute of City of Hope, Duarte, CA 91010, USA
| | - Guojun Bu
- SciNeuro Pharmaceuticals, Rockville, MD 20850, USA
| | - Yanhong Shi
- Department of Neurodegenerative Diseases, Beckman Research Institute of City of Hope, Duarte, CA 91010, USA; Irell and Manella Graduate School of Biological Sciences, Beckman Research Institute of City of Hope, Duarte, CA 91010, USA.
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31
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Martínez-Mármol R, Giordano-Santini R, Kaulich E, Cho AN, Przybyla M, Riyadh MA, Robinson E, Chew KY, Amor R, Meunier FA, Balistreri G, Short KR, Ke YD, Ittner LM, Hilliard MA. SARS-CoV-2 infection and viral fusogens cause neuronal and glial fusion that compromises neuronal activity. SCIENCE ADVANCES 2023; 9:eadg2248. [PMID: 37285437 DOI: 10.1126/sciadv.adg2248] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Accepted: 05/01/2023] [Indexed: 06/09/2023]
Abstract
Numerous viruses use specialized surface molecules called fusogens to enter host cells. Many of these viruses, including the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), can infect the brain and are associated with severe neurological symptoms through poorly understood mechanisms. We show that SARS-CoV-2 infection induces fusion between neurons and between neurons and glia in mouse and human brain organoids. We reveal that this is caused by the viral fusogen, as it is fully mimicked by the expression of the SARS-CoV-2 spike (S) protein or the unrelated fusogen p15 from the baboon orthoreovirus. We demonstrate that neuronal fusion is a progressive event, leads to the formation of multicellular syncytia, and causes the spread of large molecules and organelles. Last, using Ca2+ imaging, we show that fusion severely compromises neuronal activity. These results provide mechanistic insights into how SARS-CoV-2 and other viruses affect the nervous system, alter its function, and cause neuropathology.
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Affiliation(s)
- Ramón Martínez-Mármol
- Clem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Rosina Giordano-Santini
- Clem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Eva Kaulich
- Clem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Ann-Na Cho
- Dementia Research Centre, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Magdalena Przybyla
- Dementia Research Centre, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Md Asrafuzzaman Riyadh
- Clem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Emilija Robinson
- Dementia Research Centre, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Keng Yih Chew
- School of Chemistry and Molecular Biosciences, Faculty of Science, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Rumelo Amor
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Frédéric A Meunier
- Clem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia
- School of Biomedical Sciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Giuseppe Balistreri
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia
- Department of Virology, Faculty of Medicine, University of Helsinki, Helsinki FIN-00014, Finland
| | - Kirsty R Short
- School of Chemistry and Molecular Biosciences, Faculty of Science, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Yazi D Ke
- Dementia Research Centre, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Lars M Ittner
- Dementia Research Centre, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Massimo A Hilliard
- Clem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia
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32
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Mullis AS, Kaplan DL. Functional bioengineered tissue models of neurodegenerative diseases. Biomaterials 2023; 298:122143. [PMID: 37146365 DOI: 10.1016/j.biomaterials.2023.122143] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 04/27/2023] [Accepted: 05/01/2023] [Indexed: 05/07/2023]
Abstract
Aging-associated neurodegenerative diseases, such as Alzheimer's and Parkinson's diseases remain poorly understood and no disease-modifying treatments exist despite decades of investigation. Predominant in vitro (e.g., 2D cell culture, organoids) and in vivo (e.g., mouse) models of these diseases are insufficient mimics of human brain tissue structure and function and of human neurodegenerative pathobiology, and have thus contributed to this collective translational failure. This has been a longstanding challenge in the field, and new strategies are required to address both fundamental and translational needs. Bioengineered tissue culture models constitute a class of promising alternatives, as they can overcome the low cell density, poor nutrient exchange, and long term culturability limitations of existing in vitro models. Further, they can reconstruct the structural, mechanical, and biochemical cues of native brain tissue, providing a better mimic of human brain tissues for in vitro pathobiological investigation and drug development. We discuss bioengineering techniques for the generation of these neurodegenerative tissue models, including biomaterials-, organoid-, and microfluidics-based approaches, and design considerations for their construction. To aid the development of the next generation of functional neurodegenerative disease models, we discuss approaches to incorporate greater cellular diversity and simulate aging processes within bioengineered brain tissues.
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Affiliation(s)
- Adam S Mullis
- Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA.
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA; Allen Discovery Center, Tufts University, Medford, MA, 02155, USA.
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33
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Langworth-Green C, Patel S, Jaunmuktane Z, Jabbari E, Morris H, Thom M, Lees A, Hardy J, Zandi M, Duff K. Chronic effects of inflammation on tauopathies. Lancet Neurol 2023; 22:430-442. [PMID: 37059510 DOI: 10.1016/s1474-4422(23)00038-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 01/20/2023] [Accepted: 01/27/2023] [Indexed: 04/16/2023]
Abstract
Tauopathies are a heterogeneous group of neurodegenerative disorders that are characterised by the aggregation of the microtubule-associated protein tau into filamentous inclusions within neurons and glia. Alzheimer's disease is the most prevalent tauopathy. Despite years of intense research efforts, developing disease-modifying interventions for these disorders has been very challenging. The detrimental role that chronic inflammation plays in the pathogenesis of Alzheimer's disease is increasingly recognised; however, it is largely ascribed to the accumulation of amyloid β, leaving the effect of chronic inflammation on tau pathology and neurofibrillary tangle-related pathways greatly overlooked. Tau pathology can independently arise secondary to a range of triggers that are each associated with inflammatory processes, including infection, repetitive mild traumatic brain injury, seizure activity, and autoimmune disease. A greater understanding of the chronic effects of inflammation on the development and progression of tauopathies could help forge a path for the establishment of effective immunomodulatory disease-modifying interventions for clinical use.
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Affiliation(s)
| | - Saisha Patel
- UK Dementia Research Institute, University College London, London, UK
| | - Zane Jaunmuktane
- Department of Clinical and Movement Neurosciences, University College London, London, UK; Queen Square Brain Bank for Neurological Disorders, University College London, London, UK; Division of Neuropathology, University College London, London, UK; National Hospital for Neurology and Neurosurgery, London, UK
| | - Edwin Jabbari
- Department of Clinical and Movement Neurosciences, University College London, London, UK; National Hospital for Neurology and Neurosurgery, London, UK; Department of Neurology, Royal Free Hospital, London, UK
| | - Huw Morris
- Department of Clinical and Movement Neurosciences, University College London, London, UK; National Hospital for Neurology and Neurosurgery, London, UK; Department of Neurology, Royal Free Hospital, London, UK
| | - Maria Thom
- Division of Neuropathology, University College London, London, UK; Department of Clinical and Experimental Epilepsy, University College London, London, UK
| | - Andrew Lees
- Department of Clinical and Movement Neurosciences, University College London, London, UK; Reta Lila Weston Institute, University College London, London, UK
| | - John Hardy
- UK Dementia Research Institute, University College London, London, UK; Reta Lila Weston Institute, University College London, London, UK; Department of Neurodegenerative Disease, University College London, London, UK
| | - Michael Zandi
- Department of Neuroinflammation, UCL Queen Square Institute of Neurology, University College London, London, UK; National Hospital for Neurology and Neurosurgery, London, UK
| | - Karen Duff
- UK Dementia Research Institute, University College London, London, UK.
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Sreenivasamurthy S, Laul M, Zhao N, Kim T, Zhu D. Current progress of cerebral organoids for modeling Alzheimer's disease origins and mechanisms. Bioeng Transl Med 2023; 8:e10378. [PMID: 36925717 PMCID: PMC10013781 DOI: 10.1002/btm2.10378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 07/06/2022] [Accepted: 07/16/2022] [Indexed: 11/06/2022] Open
Abstract
Alzheimer's disease (AD) is a progressive, neurodegenerative disease that has emerged as a leading risk factor for dementia associated with increasing age. Two-dimensional (2D) cell culture and animal models, which have been used to analyze AD pathology and search for effective treatments for decades, have significantly contributed to our understanding of the mechanism of AD. Despite their successes, 2D and animal models can only capture a fraction of AD mechanisms due to their inability to recapitulate human brain-specific tissue structure, function, and cellular diversity. Recently, the emergence of three-dimensional (3D) cerebral organoids using tissue engineering and induced pluripotent stem cell technology has paved the way to develop models that resemble features of human brain tissue more accurately in comparison to prior models. In this review, we focus on summarizing key research strategies for engineering in vitro 3D human brain-specific models, major discoveries from using AD cerebral organoids, and its future perspectives.
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Affiliation(s)
- Sai Sreenivasamurthy
- Department of Biomedical EngineeringStony Brook UniversityStony BrookNew YorkUSA
| | - Mahek Laul
- Department of Biomedical EngineeringStony Brook UniversityStony BrookNew YorkUSA
| | - Nan Zhao
- Institute for NanobiotechnologyJohns Hopkins UniversityBaltimoreMarylandUSA
| | - Tiffany Kim
- Department of Biomedical EngineeringStony Brook UniversityStony BrookNew YorkUSA
| | - Donghui Zhu
- Department of Biomedical EngineeringStony Brook UniversityStony BrookNew YorkUSA
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35
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Sutter J, Bruggeman PJ, Wigdahl B, Krebs FC, Miller V. Manipulation of Oxidative Stress Responses by Non-Thermal Plasma to Treat Herpes Simplex Virus Type 1 Infection and Disease. Int J Mol Sci 2023; 24:4673. [PMID: 36902102 PMCID: PMC10003306 DOI: 10.3390/ijms24054673] [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] [Received: 12/21/2022] [Revised: 02/16/2023] [Accepted: 02/24/2023] [Indexed: 03/04/2023] Open
Abstract
Herpes simplex virus type 1 (HSV-1) is a contagious pathogen with a large global footprint, due to its ability to cause lifelong infection in patients. Current antiviral therapies are effective in limiting viral replication in the epithelial cells to alleviate clinical symptoms, but ineffective in eliminating latent viral reservoirs in neurons. Much of HSV-1 pathogenesis is dependent on its ability to manipulate oxidative stress responses to craft a cellular environment that favors HSV-1 replication. However, to maintain redox homeostasis and to promote antiviral immune responses, the infected cell can upregulate reactive oxygen and nitrogen species (RONS) while having a tight control on antioxidant concentrations to prevent cellular damage. Non-thermal plasma (NTP), which we propose as a potential therapy alternative directed against HSV-1 infection, is a means to deliver RONS that affect redox homeostasis in the infected cell. This review emphasizes how NTP can be an effective therapy for HSV-1 infections through the direct antiviral activity of RONS and via immunomodulatory changes in the infected cells that will stimulate anti-HSV-1 adaptive immune responses. Overall, NTP application can control HSV-1 replication and address the challenges of latency by decreasing the size of the viral reservoir in the nervous system.
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Affiliation(s)
- Julia Sutter
- Center for Molecular Virology and Gene Therapy, Institute for Molecular Medicine and Infectious Disease, Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA 19129, USA
| | - Peter J. Bruggeman
- Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Brian Wigdahl
- Center for Molecular Virology and Gene Therapy, Institute for Molecular Medicine and Infectious Disease, Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA 19129, USA
| | - Fred C. Krebs
- Center for Molecular Virology and Gene Therapy, Institute for Molecular Medicine and Infectious Disease, Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA 19129, USA
| | - Vandana Miller
- Center for Molecular Virology and Gene Therapy, Institute for Molecular Medicine and Infectious Disease, Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA 19129, USA
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36
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Itzhaki RF. COVID-19 and Alzheimer's Disease: What Is the Connection? J Alzheimers Dis 2023; 91:1273-1276. [PMID: 36591656 DOI: 10.3233/jad-220955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Wang et al. found that elderly COVID-19 patients were at risk of AD. The following facts suggest a possible explanation: reactivation of herpes simplex virus type 1 (HSV1) and other herpesviruses can occur in SARS-CoV-2 patients; in cell cultures, HSV1 infection causes occurrence of many AD-like features, as does reactivation of latent HSV1 after addition of certain infectious agents; recurrent experimental reactivation of HSV1-infected mice leads to formation of the main features of AD brains, and to cognitive decline. These suggest that COVID-19 results in repeated reactivation of HSV1 in brain, with subsequent accumulation of damage and eventual development of AD.
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Affiliation(s)
- Ruth F Itzhaki
- Institute of Population Ageing, University of Oxford, Oxford, UK
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37
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Amyloidogenic proteins in the SARS-CoV and SARS-CoV-2 proteomes. Nat Commun 2023; 14:945. [PMID: 36806058 PMCID: PMC9940680 DOI: 10.1038/s41467-023-36234-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 01/20/2023] [Indexed: 02/22/2023] Open
Abstract
The phenomenon of protein aggregation is associated with a wide range of human diseases. Our knowledge of the aggregation behaviour of viral proteins, however, is still rather limited. Here, we investigated this behaviour in the SARS-CoV and SARS-CoV-2 proteomes. An initial analysis using a panel of sequence-based predictors suggested the presence of multiple aggregation-prone regions (APRs) in these proteomes and revealed a strong aggregation propensity in some SARS-CoV-2 proteins. We then studied the in vitro aggregation of predicted aggregation-prone SARS-CoV and SARS-CoV-2 proteins and protein regions, including the signal sequence peptide and fusion peptides 1 and 2 of the spike protein, a peptide from the NSP6 protein, and the ORF10 and NSP11 proteins. Our results show that these peptides and proteins can form amyloid aggregates. We used circular dichroism spectroscopy to reveal the presence of β-sheet rich cores in aggregates and X-ray diffraction and Raman spectroscopy to confirm the formation of amyloid structures. Furthermore, we demonstrated that SARS-CoV-2 NSP11 aggregates are toxic to mammalian cell cultures. These results motivate further studies about the possible role of aggregation of SARS proteins in protein misfolding diseases and other human conditions.
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38
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Cuní-López C, Stewart R, White AR, Quek H. 3D in vitro modelling of human patient microglia: A focus on clinical translation and drug development in neurodegenerative diseases. J Neuroimmunol 2023; 375:578017. [PMID: 36657374 DOI: 10.1016/j.jneuroim.2023.578017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 12/28/2022] [Accepted: 01/08/2023] [Indexed: 01/13/2023]
Abstract
Microglia have an increasingly well-recognised role in the pathogenesis of neurodegenerative diseases, thereby becoming attractive therapeutic targets. However, the development of microglia-targeted therapeutics for neurodegeneration has had limited success. This stems partly from the lack of clinically relevant microglia model systems. To circumvent this translational gap, patient-derived microglial cell models established using conventional 2D in vitro techniques have emerged. Though promising, these models lack the microenvironment and multicellular interactions of the brain needed to maintain microglial homeostasis. In this review, we discuss the use of 3D in vitro platforms to improve microglia modelling and their potential benefits to fast-track drug development for neurodegenerative diseases.
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Affiliation(s)
- Carla Cuní-López
- Mental Health and Neuroscience, QIMR Berghofer Medical Research Institute, Brisbane 4006, QLD, Australia; Faculty of Medicine, The University of Queensland, Brisbane 4006, QLD, Australia.
| | - Romal Stewart
- Mental Health and Neuroscience, QIMR Berghofer Medical Research Institute, Brisbane 4006, QLD, Australia; UQ Centre for Clinical Research, The University of Queensland, Brisbane 4006, QLD, Australia.
| | - Anthony R White
- Mental Health and Neuroscience, QIMR Berghofer Medical Research Institute, Brisbane 4006, QLD, Australia; School of Biomedical Science, The University of Queensland, Brisbane 4072, QLD, Australia.
| | - Hazel Quek
- Mental Health and Neuroscience, QIMR Berghofer Medical Research Institute, Brisbane 4006, QLD, Australia; School of Biomedical Science, The University of Queensland, Brisbane 4072, QLD, Australia; School of Biomedical Science, Queensland University of Technology, Brisbane 4059, QLD, Australia.
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Rouleau N, Murugan NJ, Kaplan DL. Functional bioengineered models of the central nervous system. NATURE REVIEWS BIOENGINEERING 2023; 1:252-270. [PMID: 37064657 PMCID: PMC9903289 DOI: 10.1038/s44222-023-00027-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/16/2023] [Indexed: 02/10/2023]
Abstract
The functional complexity of the central nervous system (CNS) is unparalleled in living organisms. Its nested cells, circuits and networks encode memories, move bodies and generate experiences. Neural tissues can be engineered to assemble model systems that recapitulate essential features of the CNS and to investigate neurodevelopment, delineate pathophysiology, improve regeneration and accelerate drug discovery. In this Review, we discuss essential structure-function relationships of the CNS and examine materials and design considerations, including composition, scale, complexity and maturation, of cell biology-based and engineering-based CNS models. We highlight region-specific CNS models that can emulate functions of the cerebral cortex, hippocampus, spinal cord, neural-X interfaces and other regions, and investigate a range of applications for CNS models, including fundamental and clinical research. We conclude with an outlook to future possibilities of CNS models, highlighting the engineering challenges that remain to be overcome.
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Affiliation(s)
- Nicolas Rouleau
- Department of Health Sciences, Wilfrid Laurier University, Waterloo, Ontario Canada
- Department of Biomedical Engineering, Tufts University, Medford, MA USA
| | - Nirosha J. Murugan
- Department of Health Sciences, Wilfrid Laurier University, Waterloo, Ontario Canada
- Department of Biomedical Engineering, Tufts University, Medford, MA USA
| | - David L. Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA USA
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40
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Anwar MM. The emerging mechanism behind viral infections and extracellular vesicles hypotheses leading to neuroinflammation and Alzheimer's disease pathology. IBRAIN 2023; 9:63-71. [PMID: 37786515 PMCID: PMC10529198 DOI: 10.1002/ibra.12090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 01/14/2023] [Accepted: 01/14/2023] [Indexed: 10/04/2023]
Abstract
Despite decades of repeated and intense research, the etiology of sudden Alzheimer's disease (AD) symptoms is still unclear. AD progressive pathology mainly involves neuron damage, depositions of amyloid-beta (Aβ), and hyperphosphorylated tau protein. All these defects are manifested by exaggerated cytokine storm and neuroinflammation leading to irreversible brain damage in the long term. Despite the numerous risks and drawbacks associated with AD, it is believed that there is a hidden unknown causative and predisposing factors for AD. Extracellular vesicles (EVs) are small vesicles released by cells as a type of intercellular communication. Several pieces of evidence support the inclusion of viral components within EVs facilitating their penetration into the blood-brain barrier leading to neuroinflammation. In light of the SARS-CoV-19 pandemic and its related neurological complications, it is mandatory to highlight the possibility and viability of viral infections such as varicella-zoster virus (VZV) and herpes simplex virus (HSV) on the onset of AD. Herein, the author is investigating the potential role of VZV and HSV along with highlighting the suggested route of pathogenesis entry resulting in AD manifestations. Additionally, this review aims to summarize the role of EVs in mediating the central nervous system viral infections leading to AD.
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Affiliation(s)
- Mai M. Anwar
- Department of BiochemistryNational Organization for Drug Control and Research (NODCAR)/Egyptian Drug Authority (EDA)CairoEgypt
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41
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Raber J, Rhea EM, Banks WA. The Effects of Viruses on Insulin Sensitivity and Blood-Brain Barrier Function. Int J Mol Sci 2023; 24:2377. [PMID: 36768699 PMCID: PMC9917142 DOI: 10.3390/ijms24032377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 01/19/2023] [Accepted: 01/23/2023] [Indexed: 01/27/2023] Open
Abstract
In this review manuscript, we discuss the effects of select common viruses on insulin sensitivity and blood-brain barrier (BBB) function and the potential overlapping and distinct mechanisms involved in these effects. More specifically, we discuss the effects of human immunodeficiency virus (HIV), herpes, hepatitis, influenza, respiratory syncytial virus (RSV), and SARS-CoV-2 viruses on insulin sensitivity and BBB function and the proposed underlying mechanisms. These viruses differ in their ability to be transported across the BBB, disrupt the BBB, and/or alter the function of the BBB. For RSV and SARS-CoV-2, diabetes increases the risk of infection with the virus, in addition to viral infection increasing the risk for development of diabetes. For HIV and hepatitis C and E, enhanced TNF-a levels play a role in the detrimental effects. The winter of 2022-2023 has been labeled as a tridemic as influenza, RSV, and COVID-19 are all of concern during this flu season. There is an ongoing discussion about whether combined viral exposures of influenza, RSV, and COVID-19 have additive, synergistic, or interference effects. Therefore, increased efforts are warranted to determine how combined viral exposures affect insulin sensitivity and BBB function.
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Affiliation(s)
- Jacob Raber
- Departments of Behavioral Neuroscience, Neurology and Radiation Medicine; Affiliate Scientist, Division of Neuroscience, ONPRC, Oregon Health & Science University, Portland, OR 97239, USA
| | - Elizabeth M. Rhea
- Geriatric Research Education and Clinical Center, Veterans Affairs Puget Sound Health Care System, Seattle, WA 98108, USA
- Department of Medicine, University of Washington, Seattle, WA 98108, USA
| | - William A. Banks
- Geriatric Research Education and Clinical Center, Veterans Affairs Puget Sound Health Care System, Seattle, WA 98108, USA
- Department of Medicine, University of Washington, Seattle, WA 98108, USA
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42
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Lomoio S, Tesco G. A 3D Bioengineered Neural Tissue Model Generated from Human iPSC-Derived Neural Precursor Cells. Methods Mol Biol 2023; 2683:185-192. [PMID: 37300775 PMCID: PMC11162594 DOI: 10.1007/978-1-0716-3287-1_14] [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: 06/12/2023]
Abstract
Available models to study neuropathological diseases include cell cultures and animal models. Brain pathologies, however, are often poorly recapitulated in animal models. 2D cell culture systems are well established and have been used since the early 1900s to grow cells on flat dishes. However, conventional 2D neural culture systems, which lack key features of the brain's 3D microenvironment, often inaccurately represent the diversity and maturation of multiple cell types and their interaction under physiological and pathological conditions.To improve CNS modeling, we have designed a 3D bioengineered neural tissue model generated from human iPSC-derived neural precursor cells (NPCs). This NPC-derived biomaterial scaffold, composed of silk fibroin with an intercalated hydrogel, matches the mechanical properties of native brain tissue and supports the long-term differentiation of neural cells in a donut-shaped sponge within an optically clear central window. This chapter describes integrating iPSC-derived NPCs in these silk-collagen scaffolds and differentiating them into neural cells over time.
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Affiliation(s)
- Selene Lomoio
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA, USA.
| | - Giuseppina Tesco
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA, USA.
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43
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Snapper DM, Reginauld B, Liaudanskaya V, Fitzpatrick V, Kim Y, Georgakoudi I, Kaplan DL, Symes AJ. Development of a novel bioengineered 3D brain-like tissue for studying primary blast-induced traumatic brain injury. J Neurosci Res 2023; 101:3-19. [PMID: 36200530 DOI: 10.1002/jnr.25123] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 08/04/2022] [Accepted: 08/29/2022] [Indexed: 11/08/2022]
Abstract
Primary blast injury is caused by the direct impact of an overpressurization wave on the body. Due to limitations of current models, we have developed a novel approach to study primary blast-induced traumatic brain injury. Specifically, we employ a bioengineered 3D brain-like human tissue culture system composed of collagen-infused silk protein donut-like hydrogels embedded with human IPSC-derived neurons, human astrocytes, and a human microglial cell line. We have utilized this system within an advanced blast simulator (ABS) to expose the 3D brain cultures to a blast wave that can be precisely controlled. These 3D cultures are enclosed in a 3D-printed surrogate skull-like material containing media which are then placed in a holder apparatus inside the ABS. This allows for exposure to the blast wave alone without any secondary injury occurring. We show that blast induces an increase in lactate dehydrogenase activity and glutamate release from the cultures, indicating cellular injury. Additionally, we observe a significant increase in axonal varicosities after blast. These varicosities can be stained with antibodies recognizing amyloid precursor protein. The presence of amyloid precursor protein deposits may indicate a blast-induced axonal transport deficit. After blast injury, we find a transient release of the known TBI biomarkers, UCHL1 and NF-H at 6 h and a delayed increase in S100B at 24 and 48 h. This in vitro model will enable us to gain a better understanding of clinically relevant pathological changes that occur following primary blast and can also be utilized for discovery and characterization of biomarkers.
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Affiliation(s)
- Dustin M Snapper
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University, Bethesda, Maryland, USA
| | - Bianca Reginauld
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University, Bethesda, Maryland, USA
| | - Volha Liaudanskaya
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, USA
| | - Vincent Fitzpatrick
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, USA
| | - Yeonho Kim
- Preclinical Behavior and Modeling Core, Uniformed Services University, Bethesda, Maryland, USA
| | - Irene Georgakoudi
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, USA
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, USA
| | - Aviva J Symes
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University, Bethesda, Maryland, USA
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Insights from multi-omics integration in complex disease primary tissues. Trends Genet 2023; 39:46-58. [PMID: 36137835 DOI: 10.1016/j.tig.2022.08.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 08/11/2022] [Accepted: 08/12/2022] [Indexed: 11/23/2022]
Abstract
Genome-wide association studies (GWAS) have provided insights into the genetic basis of complex diseases. In the next step, integrative multi-omics approaches can characterize molecular profiles in relevant primary tissues to reveal the mechanisms that underlie disease development. Here, we highlight recent progress in four examples of complex diseases generated by integrative studies: type 2 diabetes (T2D), osteoarthritis, Alzheimer's disease (AD), and systemic lupus erythematosus (SLE). High-resolution methodologies such as single-cell and spatial omics techniques will become even more important in the future. Furthermore, we emphasize the urgent need to include as yet understudied cell types and increase the diversity of studied populations.
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Abstract
Studying neurological diseases have long been hampered by the lack of physiologically relevant models to resemble the complex human brain and the associated pathologies. Three-dimensional brain organoids have emerged as cutting-edge technology providing an alternative in vitro model to study healthy neural development and function as well as pathogenesis of neurological disorders and neuropathologies induced by pathogens. Nonetheless, the absence of immune cells in current models poses a barrier to fully recapitulate brain microenvironment during the onset of HIV-1-associated neuropathogenesis. To address this and to further the brain organoid technology, we have incorporated HIV-target microglia into brain organoids, generating a complex multicellular interaction, which mimics the HIV-1-infected brain environment. Here we describe the method to generate a brain organoid consisting on neurons, astrocytes, and microglia (with and without HIV infection) that recapitulate the HIV-associated neuropathology. This model has tremendous potential to expand our knowledge on neuronal dysfunction associated with HIV-1 infection of glia.
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Yang H, Oh CK, Amal H, Wishnok JS, Lewis S, Schahrer E, Trudler D, Nakamura T, Tannenbaum SR, Lipton SA. Mechanistic insight into female predominance in Alzheimer's disease based on aberrant protein S-nitrosylation of C3. SCIENCE ADVANCES 2022; 8:eade0764. [PMID: 36516243 PMCID: PMC9750152 DOI: 10.1126/sciadv.ade0764] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Protein S-nitros(yl)ation (SNO) is a posttranslational modification involved in diverse processes in health and disease and can contribute to synaptic damage in Alzheimer's disease (AD). To identify SNO proteins in AD brains, we used triaryl phosphine (SNOTRAP) combined with mass spectrometry (MS). We detected 1449 SNO proteins with 2809 SNO sites, representing a wide range of S-nitrosylated proteins in 40 postmortem AD and non-AD human brains from patients of both sexes. Integrative protein ranking revealed the top 10 increased SNO proteins, including complement component 3 (C3), p62 (SQSTM1), and phospholipase D3. Increased levels of S-nitrosylated C3 were present in female over male AD brains. Mechanistically, we show that formation of SNO-C3 is dependent on falling β-estradiol levels, leading to increased synaptic phagocytosis and thus synapse loss and consequent cognitive decline. Collectively, we demonstrate robust alterations in the S-nitrosoproteome that contribute to AD pathogenesis in a sex-dependent manner.
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Affiliation(s)
- Hongmei Yang
- Departments of Biological Engineering and Chemistry, and Center for Environmental Health Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Northeast Asia Institute of Chinese Medicine, Changchun University of Chinese Medicine, Changchun 130021, China
| | - Chang-ki Oh
- Department of Molecular Medicine and Neurodegeneration New Medicines Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Haitham Amal
- Departments of Biological Engineering and Chemistry, and Center for Environmental Health Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Institute for Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - John S. Wishnok
- Departments of Biological Engineering and Chemistry, and Center for Environmental Health Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Sarah Lewis
- Departments of Biological Engineering and Chemistry, and Center for Environmental Health Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Emily Schahrer
- Department of Molecular Medicine and Neurodegeneration New Medicines Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Dorit Trudler
- Department of Molecular Medicine and Neurodegeneration New Medicines Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Tomohiro Nakamura
- Department of Molecular Medicine and Neurodegeneration New Medicines Center, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Steven R. Tannenbaum
- Departments of Biological Engineering and Chemistry, and Center for Environmental Health Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Corresponding author. (S.R.T.); (S.A.L.)
| | - Stuart A. Lipton
- Department of Molecular Medicine and Neurodegeneration New Medicines Center, The Scripps Research Institute, La Jolla, CA 92037, USA
- Department of Neurosciences, School of Medicine, University of California, San Diego, La Jolla CA 92093, USA
- Corresponding author. (S.R.T.); (S.A.L.)
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A Comprehensive Update of Cerebral Organoids between Applications and Challenges. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:7264649. [DOI: 10.1155/2022/7264649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 10/30/2022] [Accepted: 11/17/2022] [Indexed: 12/12/2022]
Abstract
The basic technology of stem cells has been developed and created organoids, which have established a strong interest in regenerative medicine. Different cell types have been used to generate cerebral organoids, which include interneurons and oligodendrocytes (OLs). OLs are fundamental for brain development. Abundant studies have displayed that brain organoids can recapitulate fundamental and vital features of the human brain, such as cellular regulation and distribution, neuronal networks, electrical activities, and physiological structure. The organoids contain essential ventral brain domains and functional cortical interneurons, which are similar to the developing cortex and medial ganglionic eminence (MGE). So, brain organoids have provided a singular model to study and investigate neurological disorder mechanisms and therapeutics. Furthermore, the blood brain barrier (BBB) organoids modeling contributes to accelerate therapeutic discovery for the treatment of several neuropathologies. In this review, we summarized the advances of the brain organoids applications to investigate neurological disorder mechanisms such as neurodevelopmental and neurodegenerative disorders, mental disorders, brain cancer, and cerebral viral infections. We discussed brain organoids’ therapeutic application as a potential therapeutic unique method and highlighted in detail the challenges and hurdles of organoid models.
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Vojtechova I, Machacek T, Kristofikova Z, Stuchlik A, Petrasek T. Infectious origin of Alzheimer’s disease: Amyloid beta as a component of brain antimicrobial immunity. PLoS Pathog 2022; 18:e1010929. [PMCID: PMC9671327 DOI: 10.1371/journal.ppat.1010929] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The amyloid cascade hypothesis, focusing on pathological proteins aggregation, has so far failed to uncover the root cause of Alzheimer’s disease (AD), or to provide an effective therapy. This traditional paradigm essentially explains a mechanism involved in the development of sporadic AD rather than its cause. The failure of an overwhelming majority of clinical studies (99.6%) demonstrates that a breakthrough in therapy would be difficult if not impossible without understanding the etiology of AD. It becomes more and more apparent that the AD pathology might originate from brain infection. In this review, we discuss a potential role of bacteria, viruses, fungi, and eukaryotic parasites as triggers of AD pathology. We show evidence from the current literature that amyloid beta, traditionally viewed as pathological, actually acts as an antimicrobial peptide, protecting the brain against pathogens. However, in case of a prolonged or excessive activation of a senescent immune system, amyloid beta accumulation and aggregation becomes damaging and supports runaway neurodegenerative processes in AD. This is paralleled by the recent study by Alam and colleagues (2022) who showed that alpha-synuclein, the protein accumulating in synucleinopathies, also plays a critical physiological role in immune reactions and inflammation, showing an unforeseen link between the 2 unrelated classes of neurodegenerative disorders. The multiplication of the amyloid precursor protein gene, recently described by Lee and collegues (2018), and possible reactivation of human endogenous retroviruses by pathogens fits well into the same picture. We discuss these new findings from the viewpoint of the infection hypothesis of AD and offer suggestions for future research. More than a century after its discovery, Alzheimer’s disease (AD) remains incurable and mysterious. The dominant hypothesis of amyloid cascade has succeeded in explaining the key pathological mechanism, but not its trigger. Amyloid beta has been traditionally considered a pathological peptide, and its physiological functions remain poorly known. These knowledge gaps have contributed to repeated failures of clinical studies. The emerging infectious hypothesis of AD considers central nervous system (CNS) infection the primary trigger of sporadic AD. A closely connected hypothesis claims that amyloid beta is an antimicrobial peptide. In this review, we discuss the available evidence for the involvement of infections in AD, coming from epidemiological studies, post mortem analyses of brain tissue, and experiments in vitro and in vivo. We argue there is no unique “Alzheimer’s germ,” instead, AD is a general reaction of the CNS to chronic infections, in the milieu of an aged immune system. The pathology may become self-sustained even without continuous presence of microbes in the brain. Importantly, the infectious hypothesis leads to testable predictions. Targeting amyloid beta should be ineffective, unless the triggering pathogen and inflammatory response are addressed as well. Meticulous control of selected infections might be the best near-term strategy for AD prevention.
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Affiliation(s)
- Iveta Vojtechova
- National Institute of Mental Health, Klecany, Czech Republic
- Laboratory of Neurophysiology of Memory, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
- * E-mail: , (IV); , (TP)
| | - Tomas Machacek
- Department of Parasitology, Faculty of Science, Charles University, Prague, Czech Republic
| | | | - Ales Stuchlik
- National Institute of Mental Health, Klecany, Czech Republic
- Laboratory of Neurophysiology of Memory, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Tomas Petrasek
- National Institute of Mental Health, Klecany, Czech Republic
- Laboratory of Neurophysiology of Memory, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
- * E-mail: , (IV); , (TP)
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Goldhardt O, Freiberger R, Dreyer T, Wilner L, Yakushev I, Ortner M, Förstl H, Diehl‐Schmid J, Milz E, Priller J, Ramirez A, Magdolen V, Thaler M, Grimmer T. Herpes simplex virus alters Alzheimer's disease biomarkers ‐ A hypothesis paper. Alzheimers Dement 2022; 19:2117-2134. [PMID: 36396609 DOI: 10.1002/alz.12834] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 09/19/2022] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Human herpes simplex virus 1 (HSV1) is discussed to induce amyloid-β (Aβ) accumulation and neurofibrillary tangles of hyperphosphorylated tau (pTau) in Alzheimer's disease (AD) in cell culture and animal models. Aβ appears to be virostatic. We investigated the association between intrathecal antibodies against HSV or cytomegalovirus (CMV) and cerebrospinal fluid (CSF) AD biomarkers. METHODS Aβ42 /Aβ40 ratio, pTau, and tTau were measured in CSF of 117 patients with early AD positive for amyloid pathology (A+) and 30 healthy controls (A-). CSF-to-serum anti-HSV1/2-IgG antibody indices (AI-IgGHSV1/2 ) and CMV (AI-IgGCMV ) were determined by enzyme-linked immunosorbent assay (ELISA). RESULTS Exclusively in HSV1-seropositive AD, pTau was positively and significantly predicted by AI-IgGHSV1/2 and negatively by the Aβ42 /Aβ40 ratio in both univariate and multivariate regression analyses. Furthermore, a significant and negative interaction between the AI-IgGHSV1/2 and Aβ42 /Aβ40 ratio on pTau was found. DISCUSSION The results support the hypothesis that HSV infection contributes to AD. HIGHLIGHTS HSV antibody index is positively associated with tau pathology in patients with AD. HSV antibody index is negatively associated with cerebral FDG metabolism. Amyloid modulates the association of HSV antibody index with CSF-pTau. HSV in AD offers a pathophysiological model connecting tau and amyloid.
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Affiliation(s)
- Oliver Goldhardt
- Department of Psychiatry and Psychotherapy School of Medicine Klinikum rechts der Isar Technical University of Munich Munich Germany
| | - Robert Freiberger
- Department of Psychiatry and Psychotherapy School of Medicine Klinikum rechts der Isar Technical University of Munich Munich Germany
| | - Tobias Dreyer
- Department of Obstetrics and Gynecology School of Medicine, Klinikum rechts der Isar, Technical University of Munich Munich Germany
| | - Luisa Wilner
- Department of Psychiatry and Psychotherapy School of Medicine Klinikum rechts der Isar Technical University of Munich Munich Germany
- Department of Nuclear Medicine, School of Medicine Klinikum rechts der Isar, Technical University of Munich Munich Germany
| | - Igor Yakushev
- Department of Nuclear Medicine, School of Medicine Klinikum rechts der Isar, Technical University of Munich Munich Germany
| | - Marion Ortner
- Department of Psychiatry and Psychotherapy School of Medicine Klinikum rechts der Isar Technical University of Munich Munich Germany
| | - Hans Förstl
- Department of Psychiatry and Psychotherapy School of Medicine Klinikum rechts der Isar Technical University of Munich Munich Germany
| | - Janine Diehl‐Schmid
- Department of Psychiatry and Psychotherapy School of Medicine Klinikum rechts der Isar Technical University of Munich Munich Germany
| | - Esther Milz
- Division of Neurogenetics and Molecular Psychiatry Department of Psychiatry and Psychotherapy, Faculty of Medicine and University Hospital Cologne, University of Cologne Cologne Germany
| | - Josef Priller
- Department of Psychiatry and Psychotherapy School of Medicine Klinikum rechts der Isar Technical University of Munich Munich Germany
| | - Alfredo Ramirez
- Division of Neurogenetics and Molecular Psychiatry Department of Psychiatry and Psychotherapy, Faculty of Medicine and University Hospital Cologne, University of Cologne Cologne Germany
- Department of Neurodegenerative Diseases and Geriatric Psychiatry Medical Faculty University Hospital Bonn Bonn Germany
- German Center for Neurodegenerative Diseases (DZNE) Bonn Germany
- Department of Psychiatry and Glenn Biggs Institute for Alzheimer's and Neurodegenerative Diseases San Antonio Texas USA
- Cluster of Excellence Cellular Stress Responses in Aging‐associated Diseases (CECAD) University of Cologne Cologne Germany
| | - Viktor Magdolen
- Department of Obstetrics and Gynecology School of Medicine, Klinikum rechts der Isar, Technical University of Munich Munich Germany
| | - Markus Thaler
- Institute for Clinical Chemistry and Pathobiochemistry School of Medicine, Klinikum rechts der Isar, Technical University of Munich Munich Germany
| | - Timo Grimmer
- Department of Psychiatry and Psychotherapy School of Medicine Klinikum rechts der Isar Technical University of Munich Munich Germany
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Alzheimer's Disease: Treatment Strategies and Their Limitations. Int J Mol Sci 2022; 23:ijms232213954. [PMID: 36430432 PMCID: PMC9697769 DOI: 10.3390/ijms232213954] [Citation(s) in RCA: 67] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/08/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022] Open
Abstract
Alzheimer's disease (AD) is the most frequent case of neurodegenerative disease and is becoming a major public health problem all over the world. Many therapeutic strategies have been explored for several decades; however, there is still no curative treatment, and the priority remains prevention. In this review, we present an update on the clinical and physiological phase of the AD spectrum, modifiable and non-modifiable risk factors for AD treatment with a focus on prevention strategies, then research models used in AD, followed by a discussion of treatment limitations. The prevention methods can significantly slow AD evolution and are currently the best strategy possible before the advanced stages of the disease. Indeed, current drug treatments have only symptomatic effects, and disease-modifying treatments are not yet available. Drug delivery to the central nervous system remains a complex process and represents a challenge for developing therapeutic and preventive strategies. Studies are underway to test new techniques to facilitate the bioavailability of molecules to the brain. After a deep study of the literature, we find the use of soft nanoparticles, in particular nanoliposomes and exosomes, as an innovative approach for preventive and therapeutic strategies in reducing the risk of AD and solving problems of brain bioavailability. Studies show the promising role of nanoliposomes and exosomes as smart drug delivery systems able to penetrate the blood-brain barrier and target brain tissues. Finally, the different drug administration techniques for neurological disorders are discussed. One of the promising therapeutic methods is the intranasal administration strategy which should be used for preclinical and clinical studies of neurodegenerative diseases.
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