101
|
Cai Q, He B, Weiberg A, Buck AH, Jin H. Small RNAs and extracellular vesicles: New mechanisms of cross-species communication and innovative tools for disease control. PLoS Pathog 2019; 15:e1008090. [PMID: 31887135 PMCID: PMC6936782 DOI: 10.1371/journal.ppat.1008090] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
- Qiang Cai
- Department of Microbiology and Plant Pathology, Center for Plant Cell Biology, Institute for Integrative Genome Biology, University of California, Riverside, California, United States of America
| | - Baoye He
- Department of Microbiology and Plant Pathology, Center for Plant Cell Biology, Institute for Integrative Genome Biology, University of California, Riverside, California, United States of America
| | - Arne Weiberg
- Department of Biology, Ludwig-Maximilians University of Munich (LMU), Munich, Germany
| | - Amy H. Buck
- Institute of Immunology and Infection Research, School of Biological Sciences, University of Edinburgh, Edinburgh, United Kingdom
- Centre for Immunity, Infection and Evolution, School of Biological Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Hailing Jin
- Department of Microbiology and Plant Pathology, Center for Plant Cell Biology, Institute for Integrative Genome Biology, University of California, Riverside, California, United States of America
| |
Collapse
|
102
|
Abstract
Advances in neonatology have led to unprecedented improvements in neonatal survival such that those born as early as 22 weeks of gestation now have some chance of survival, and over 70% of those born at 24 weeks of gestation survive. Up to 50% of infants born extremely preterm develop poor outcomes involving long-term neurodevelopmental impairments affecting cognition and learning, or motor problems such as cerebral palsy. Poor outcomes arise because the preterm brain is vulnerable both to direct injury (by events such as intracerebral hemorrhage, infection, and/or hypoxia), or indirect injury due to disruption of normal development. This neonatal brain injury and/or dysmaturation is called "encephalopathy of prematurity". Current and future strategies to improve outcomes in this population include prevention of preterm birth, and pre-, peri-, and postnatal approaches to protect the developing brain. This review will describe mechanisms of preterm brain injury, and current and upcoming therapies in the antepartum and postnatal period to improve preterm encephalopathy.
Collapse
Affiliation(s)
- Pratik Parikh
- Department of Pediatrics, Division of Neonatology, University of Washington, Seattle, WA.
| | - Sandra E Juul
- Department of Pediatrics, Division of Neonatology, University of Washington, Seattle, WA.
| |
Collapse
|
103
|
Haddad M, Perrotte M, Khedher MRB, Demongin C, Lepage A, Fülöp T, Ramassamy C. Methylglyoxal and Glyoxal as Potential Peripheral Markers for MCI Diagnosis and Their Effects on the Expression of Neurotrophic, Inflammatory and Neurodegenerative Factors in Neurons and in Neuronal Derived-Extracellular Vesicles. Int J Mol Sci 2019; 20:ijms20194906. [PMID: 31623327 PMCID: PMC6801730 DOI: 10.3390/ijms20194906] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 09/14/2019] [Accepted: 09/23/2019] [Indexed: 12/29/2022] Open
Abstract
Methylglyoxal (MG) and glyoxal (GO) are suggested to be associated with the development of neurodegenerative pathologies. However, their peripheral levels in relation to cognitive decline and their effects on key factors in neuronal cells are poorly investigated. The aim of this study was to determine their serum levels in MCI (mild cognitive impairment) and Alzheimer’s disease (AD) patients, to analyze their effects on the neurotrophic and inflammatory factors, on neurodegenerative markers in neuronal cells and in neuronal derived-extracellular vesicles (nEVs). Our results show that MG and GO levels in serum, determined by HPLC, were higher in MCI. ROC (receiver-operating characteristic curves) analysis showed that the levels of MG in serum have higher sensitivity to differentiate MCI from controls but not from AD. Meanwhile, serum GO levels differentiate MCI from control and AD groups. Cells and nEVs levels of BDNF, PRGN, NSE, APP, MMP-9, ANGPTL-4, LCN2, PTX2, S100B, RAGE, Aβ peptide, pTau T181 and alpha-synuclein were quantified by luminex assay. Treatment of neuronal cells with MG or GO reduced the cellular levels of NSE, PRGN, APP, MMP-9 and ANGPTL-4 and the nEVs levels of BDNF, PRGN and LCN2. Our findings suggest that targeting MG and GO may be a promising therapeutic strategy to prevent or delay the progression of AD.
Collapse
Affiliation(s)
- Mohamed Haddad
- Institut National de Recherche Scientifique - Centre Armand-Frappier Santé Biotechnologie, Laval, QC H7V 1B7, Canada.
- Institute on Nutrition and Functional Foods, Laval University, Quebec City, QC G1V 0A6, Canada.
| | - Morgane Perrotte
- Institut National de Recherche Scientifique - Centre Armand-Frappier Santé Biotechnologie, Laval, QC H7V 1B7, Canada.
- Institute on Nutrition and Functional Foods, Laval University, Quebec City, QC G1V 0A6, Canada.
| | - Mohamed Raâfet Ben Khedher
- Institut National de Recherche Scientifique - Centre Armand-Frappier Santé Biotechnologie, Laval, QC H7V 1B7, Canada.
- Institute on Nutrition and Functional Foods, Laval University, Quebec City, QC G1V 0A6, Canada.
| | - Clément Demongin
- Institut National de Recherche Scientifique - Centre Armand-Frappier Santé Biotechnologie, Laval, QC H7V 1B7, Canada.
| | - Aurélie Lepage
- Department of Medicine, Geriatric Division, Research Center on Aging, Sherbrooke University, Sherbrooke, QC J1H 4C4, Canada.
| | - Tamás Fülöp
- Department of Medicine, Geriatric Division, Research Center on Aging, Sherbrooke University, Sherbrooke, QC J1H 4C4, Canada.
| | - Charles Ramassamy
- Institut National de Recherche Scientifique - Centre Armand-Frappier Santé Biotechnologie, Laval, QC H7V 1B7, Canada.
- Institute on Nutrition and Functional Foods, Laval University, Quebec City, QC G1V 0A6, Canada.
| |
Collapse
|
104
|
Watt MJ, Miotto PM, De Nardo W, Montgomery MK. The Liver as an Endocrine Organ-Linking NAFLD and Insulin Resistance. Endocr Rev 2019; 40:1367-1393. [PMID: 31098621 DOI: 10.1210/er.2019-00034] [Citation(s) in RCA: 329] [Impact Index Per Article: 65.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 04/04/2019] [Indexed: 02/06/2023]
Abstract
The liver is a dynamic organ that plays critical roles in many physiological processes, including the regulation of systemic glucose and lipid metabolism. Dysfunctional hepatic lipid metabolism is a cause of nonalcoholic fatty liver disease (NAFLD), the most common chronic liver disorder worldwide, and is closely associated with insulin resistance and type 2 diabetes. Through the use of advanced mass spectrometry "omics" approaches and detailed experimentation in cells, mice, and humans, we now understand that the liver secretes a wide array of proteins, metabolites, and noncoding RNAs (miRNAs) and that many of these secreted factors exert powerful effects on metabolic processes both in the liver and in peripheral tissues. In this review, we summarize the rapidly evolving field of "hepatokine" biology with a particular focus on delineating previously unappreciated communication between the liver and other tissues in the body. We describe the NAFLD-induced changes in secretion of liver proteins, lipids, other metabolites, and miRNAs, and how these molecules alter metabolism in liver, muscle, adipose tissue, and pancreas to induce insulin resistance. We also synthesize the limited information that indicates that extracellular vesicles, and in particular exosomes, may be an important mechanism for intertissue communication in normal physiology and in promoting metabolic dysregulation in NAFLD.
Collapse
Affiliation(s)
- Matthew J Watt
- Department of Physiology, University of Melbourne, Melbourne, Victoria, Australia
| | - Paula M Miotto
- Department of Physiology, University of Melbourne, Melbourne, Victoria, Australia
| | - William De Nardo
- Department of Physiology, University of Melbourne, Melbourne, Victoria, Australia
| | | |
Collapse
|
105
|
Xu J, Wang Y, Hsu CY, Gao Y, Meyers CA, Chang L, Zhang L, Broderick K, Ding C, Peault B, Witwer K, James AW. Human perivascular stem cell-derived extracellular vesicles mediate bone repair. eLife 2019; 8:e48191. [PMID: 31482845 PMCID: PMC6764819 DOI: 10.7554/elife.48191] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 09/03/2019] [Indexed: 12/23/2022] Open
Abstract
The vascular wall is a source of progenitor cells that are able to induce skeletal repair, primarily by paracrine mechanisms. Here, the paracrine role of extracellular vesicles (EVs) in bone healing was investigated. First, purified human perivascular stem cells (PSCs) were observed to induce mitogenic, pro-migratory, and pro-osteogenic effects on osteoprogenitor cells while in non-contact co-culture via elaboration of EVs. PSC-derived EVs shared mitogenic, pro-migratory, and pro-osteogenic properties of their parent cell. PSC-EV effects were dependent on surface-associated tetraspanins, as demonstrated by EV trypsinization, or neutralizing antibodies for CD9 or CD81. Moreover, shRNA knockdown in recipient cells demonstrated requirement for the CD9/CD81 binding partners IGSF8 and PTGFRN for EV bioactivity. Finally, PSC-EVs stimulated bone repair, and did so via stimulation of skeletal cell proliferation, migration, and osteodifferentiation. In sum, PSC-EVs mediate the same tissue repair effects of perivascular stem cells, and represent an 'off-the-shelf' alternative for bone tissue regeneration.
Collapse
Affiliation(s)
- Jiajia Xu
- Department of PathologyJohns Hopkins UniversityBaltimoreUnited States
| | - Yiyun Wang
- Department of PathologyJohns Hopkins UniversityBaltimoreUnited States
| | - Ching-Yun Hsu
- Department of PathologyJohns Hopkins UniversityBaltimoreUnited States
| | - Yongxing Gao
- Department of PathologyJohns Hopkins UniversityBaltimoreUnited States
| | | | - Leslie Chang
- Department of PathologyJohns Hopkins UniversityBaltimoreUnited States
| | - Leititia Zhang
- Department of PathologyJohns Hopkins UniversityBaltimoreUnited States
- Department of Oral and Maxillofacial Surgery, School of StomatologyChina Medical UniversityShenyangChina
| | | | - Catherine Ding
- Department of Orthopaedic Surgery, Orthopaedic Hospital Research CenterUCLA, Orthopaedic HospitalLos AngelesUnited States
| | - Bruno Peault
- Department of Orthopaedic Surgery, Orthopaedic Hospital Research CenterUCLA, Orthopaedic HospitalLos AngelesUnited States
- Centre For Cardiovascular ScienceUniversity of EdinburghEdinburghUnited Kingdom
- MRC Centre for Regenerative MedicineUniversity of EdinburghEdinburghUnited Kingdom
| | - Kenneth Witwer
- Department of Molecular and Comparative PathobiologyJohns Hopkins UniversityBaltimoreUnited States
- Department of NeurologyJohns Hopkins UniversityBaltimoreUnited States
| | | |
Collapse
|
106
|
Emerging Role of Genetic Alterations Affecting Exosome Biology in Neurodegenerative Diseases. Int J Mol Sci 2019; 20:ijms20174113. [PMID: 31450727 PMCID: PMC6747137 DOI: 10.3390/ijms20174113] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 08/21/2019] [Accepted: 08/22/2019] [Indexed: 12/11/2022] Open
Abstract
The abnormal deposition of proteins in brain tissue is a common feature of neurodegenerative diseases (NDs) often accompanied by the spread of mutated proteins, causing neuronal toxicity. Exosomes play a fundamental role on their releasing in extracellular space after endosomal pathway activation, allowing to remove protein aggregates by lysosomal degradation or their inclusion into multivesicular bodies (MVBs), besides promoting cellular cross-talk. The emerging evidence of pathogenic mutations associated to ND susceptibility, leading to impairment of exosome production and secretion, opens a new perspective on the mechanisms involved in neurodegeneration. Recent findings suggest to investigate the genetic mechanisms regulating the different exosome functions in central nervous system (CNS), to understand their role in the pathogenesis of NDs, addressing the identification of diagnostic and pharmacological targets. This review aims to summarize the mechanisms underlying exosome biogenesis, their molecular composition and functions in CNS, with a specific focus on the recent findings invoking a defective exosome biogenesis as a common biological feature of the major NDs, caused by genetic alterations. Further definition of the consequences of specific genetic mutations on exosome biogenesis and release will improve diagnostic and pharmacological studies in NDs.
Collapse
|
107
|
Lee DS, Suh MI, Kang SY, Hwang DW. Physiologic constraints of using exosomes in vivo as systemic delivery vehicles. PRECISION NANOMEDICINE 2019. [DOI: 10.33218/prnano2(3)070819.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Systemic delivery of exosomes meets hurdles which had not been elucidated using live molecular imaging for their biodistribution. Production and uptake of endogenous exosomes are expected to be nonspecific and specific, respectively, where external stimuli of production of exosomes and their quantitative degree of productions are not understood. Despite this lack of understanding of basic physiology of in vivo behavior of exosomes including their possible paracrine or endocrine actions, many engineering efforts are taken to develop therapeutic vehicles. Especially, the fraction of exosomes’ taking the routes of waste disposal and exerting target actions are not characterized after systemic administration. Here, we reviewed the literature about in vivo distribution and disposal/excretion of exogenous or endogenous exosomes and, from these limited resources of knowledge currently available, summarized the knowledge and the uncertainties of exosomes on physiologic standpoints. An eloquent example of the investigations to understand the roles and confounders of exosomes’ action in the brain was highlighted with emphasis on the recent discovery of brain lymphatics and hypothesis of glymphatic/lymphatic clearance pathways in diseases as well as in physiologic processes. The possibility of delivering therapeutic exosomes through the systemic circulation, across blood-brain barriers and finally to target cells such as microglia, astrocytes and/or neurons is a good testbed in which the investigators can formulate problems to solve for both understanding (science) and application (engineering).
Collapse
Affiliation(s)
- Dong Soo Lee
- Department of Nuclear Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - MInseok Suh
- 2Department of Molecular Medicine and Biopharmaceutical Sciences, Seoul National University,
| | - Seo Young Kang
- Department of Nuclear Medicine, Ewha Womans University Medical Center, Seoul,
| | - Do Won Hwang
- Department of Nuclear Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| |
Collapse
|
108
|
Stronati E, Conti R, Cacci E, Cardarelli S, Biagioni S, Poiana G. Extracellular Vesicle-Induced Differentiation of Neural Stem Progenitor Cells. Int J Mol Sci 2019; 20:ijms20153691. [PMID: 31357666 PMCID: PMC6696602 DOI: 10.3390/ijms20153691] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 07/24/2019] [Accepted: 07/25/2019] [Indexed: 12/14/2022] Open
Abstract
Neural stem progenitor cells (NSPCs) from E13.5 mouse embryos can be maintained in culture under proliferating conditions. Upon growth-factor removal, they may differentiate toward either neuronal or glial phenotypes or both. Exosomes are small extracellular vesicles that are part of the cell secretome; they may contain and deliver both proteins and genetic material and thus play a role in cell-cell communication, guide axonal growth, modulate synaptic activity and regulate peripheral nerve regeneration. In this work, we were interested in determining whether NSPCs and their progeny can produce and secrete extracellular vesicles (EVs) and if their content can affect cell differentiation. Our results indicate that cultured NSPCs produce and secrete EVs both under proliferating conditions and after differentiation. Treatment of proliferating NSPCs with EVs derived from differentiated NSPCs triggers cell differentiation in a dose-dependent manner, as demonstrated by glial- and neuronal-marker expression.
Collapse
Affiliation(s)
- Eleonora Stronati
- Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy
- Department of Biological Science, Southern Methodist University, Dallas, TX 75275, USA
| | - Roberta Conti
- Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Emanuele Cacci
- Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Silvia Cardarelli
- Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Stefano Biagioni
- Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - Giancarlo Poiana
- Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy.
| |
Collapse
|
109
|
Zhuo C, Hou W, Li G, Mao F, Li S, Lin X, Jiang D, Xu Y, Tian H, Wang W, Cheng L. The genomics of schizophrenia: Shortcomings and solutions. Prog Neuropsychopharmacol Biol Psychiatry 2019; 93:71-76. [PMID: 30904563 DOI: 10.1016/j.pnpbp.2019.03.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 02/20/2019] [Accepted: 03/20/2019] [Indexed: 12/13/2022]
Abstract
Due to recent advances in human genomic technologies, there have been explosive interests and extensive research on the genomics of schizophrenia, a severe psychiatric disorder characterized by social cognitive deficits, hallucinations, and delusions. These new technologies, including next-generation sequencing (NGS), genome-wide association studies (GWAS), and the Clustered Regularly Interspaced Short Palindromic Repeats-associated nuclease 9 (CRISPR/Cas9) genome editing platform are capable of interrogating and editing the genome directly. In the past few years, these efforts have led to the identification of important loci and genes susceptible to schizophrenia. The findings have increased our understanding of the underlying genetic causes of schizophrenia and aided in the development of new approaches for more effectively diagnosing and treating schizophrenia. Despite the substantial progress, there are several unanswered questions about the genomics of schizophrenia, and there are a number of potential shortcomings in the current literature considering the complexity of the disease and limits of the current technologies. In the present review, we assessed the existing literature on the genomics of schizophrenia, identifying the strengths and study design shortcomings from the following aspects: elucidation of the pathogenesis, early risk prediction and diagnosis, and the treatment of schizophrenia. Moreover, we have proposed solutions to overcome the shortcomings of past studies. Lastly, we have discussed the importance of developing multidisciplinary teams and global research groups in order to improve the lives of schizophrenic patients globally.
Collapse
Affiliation(s)
- Chuanjun Zhuo
- Department of Psychiatry, Wenzhou Seventh People's Hospital, Wenzhou 325000, China; Department of Psychiatry, Institute of Mental Health, Psychiatric Genetics Laboratory (PSYG-Lab), Jining Medical University, Jining 272191, China; Department of Psychiatry, College of Basic Medical Research, Tianjin Medical University, Tianjin 300000, China; Department of Psychiatry, First Hospital/First Clinical Medical College of Shanxi Medical University, Taiyuan, China, MDT Center for Cognitive Impairment and Sleep Disorders, First Hospital of Shanxi Medical University, Taiyuan, China, National Key Disciplines, Key Laboratory for Cellular Physiology, Ministry of Education, Department of Neurobiology, Shanxi Medical University, Taiyuan 030001, China; Department of Psychiatric-Neuroimaging-Genetics and Morbidity Laboratory (PNGC-Lab), Nankai University Affiliated Anding Hospital, Tianjin Mental Health Center, Mental Health Teaching Hospital, Tianjin Medical University, Tianjin 300222, China; Department of China-Canada Biological Psychiatry Lab, Xiamen Xianyue Hospital, Xiamen 361000, China.
| | - Weihong Hou
- Department of Biochemistry and Molecular Biology, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Gongying Li
- Department of Psychiatry, Wenzhou Seventh People's Hospital, Wenzhou 325000, China
| | - Fuqiang Mao
- Department of Psychiatry, College of Basic Medical Research, Tianjin Medical University, Tianjin 300000, China
| | - Shen Li
- Department of Psychiatry, College of Basic Medical Research, Tianjin Medical University, Tianjin 300000, China
| | - Xiaodong Lin
- Department of Psychiatry, Wenzhou Seventh People's Hospital, Wenzhou 325000, China
| | - Deguo Jiang
- Department of Psychiatry, Wenzhou Seventh People's Hospital, Wenzhou 325000, China
| | - Yong Xu
- Department of Psychiatry, First Hospital/First Clinical Medical College of Shanxi Medical University, Taiyuan, China, MDT Center for Cognitive Impairment and Sleep Disorders, First Hospital of Shanxi Medical University, Taiyuan, China, National Key Disciplines, Key Laboratory for Cellular Physiology, Ministry of Education, Department of Neurobiology, Shanxi Medical University, Taiyuan 030001, China
| | - Hongjun Tian
- Department of Psychiatric-Neuroimaging-Genetics and Morbidity Laboratory (PNGC-Lab), Nankai University Affiliated Anding Hospital, Tianjin Mental Health Center, Mental Health Teaching Hospital, Tianjin Medical University, Tianjin 300222, China
| | - Wenqiang Wang
- Department of China-Canada Biological Psychiatry Lab, Xiamen Xianyue Hospital, Xiamen 361000, China
| | - Langlang Cheng
- Department of Psychiatry, Wenzhou Seventh People's Hospital, Wenzhou 325000, China
| |
Collapse
|
110
|
Zhou W, Woodson M, Sherman MB, Neelakanta G, Sultana H. Exosomes mediate Zika virus transmission through SMPD3 neutral Sphingomyelinase in cortical neurons. Emerg Microbes Infect 2019; 8:307-326. [PMID: 30866785 PMCID: PMC6455149 DOI: 10.1080/22221751.2019.1578188] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The harmful effects of ZIKA virus (ZIKV) infection are reflected by severe neurological manifestations such as microcephaly in neonates and other complications associated with Guillain-Barré syndrome in adults. The transmission dynamics of ZIKV in or between neurons, or within the developing brains of the foetuses are not fully understood. Using primary cultures of murine cortical neurons, we show that ZIKV uses exosomes as mediators of viral transmission between neurons. Cryo-electron microscopy showed heterogeneous population of neuronal exosomes with a size range of 30–200 nm. Increased production of exosomes from neuronal cells was noted upon ZIKV infection. Neuronal exosomes contained both ZIKV viral RNA and protein(s) that were highly infectious to naïve cells. RNaseA and neutralizing antibodies treatment studies suggest the presence of viral RNA/proteins inside exosomes. Exosomes derived from time- and dose-dependent incubations showed increasing viral loads suggesting higher packaging and delivery of ZIKV RNA and proteins. Furthermore, we noted that ZIKV induced both activity and gene expression of neutral Sphingomyelinase (nSMase)-2/SMPD3, an important molecule that regulates production and release of exosomes. Silencing of SMPD3 in neurons resulted in reduced viral burden and transmission through exosomes. Treatment with SMPD3 specific inhibitor GW4869, significantly reduced ZIKV loads in both cortical neurons and in exosomes derived from these neuronal cells. Taken together, our results suggest that ZIKV modulates SMPD3 activity in cortical neurons for its infection and transmission through exosomes perhaps leading to severe neuronal death that may result in neurological manifestations such as microcephaly in the developing embryonic brains.
Collapse
Affiliation(s)
- Wenshuo Zhou
- a Department of Biological Sciences, Center for Molecular Medicine , Old Dominion University , Norfolk , VA , USA
| | - Michael Woodson
- b Department of Biochemistry and Molecular Biology , University of Texas Medical Branch , Galveston , TX , USA
| | - Michael B Sherman
- b Department of Biochemistry and Molecular Biology , University of Texas Medical Branch , Galveston , TX , USA.,c Sealy Center for Structural Biology and Molecular Biophysics , University of Texas Medical Branch , Galveston , TX , USA
| | - Girish Neelakanta
- a Department of Biological Sciences, Center for Molecular Medicine , Old Dominion University , Norfolk , VA , USA
| | - Hameeda Sultana
- a Department of Biological Sciences, Center for Molecular Medicine , Old Dominion University , Norfolk , VA , USA.,d Department of Medicine, Division of Infectious Diseases and International Health , University of Virginia School of Medicine , Charlottesville , VA , USA
| |
Collapse
|
111
|
You Y, Ikezu T. Emerging roles of extracellular vesicles in neurodegenerative disorders. Neurobiol Dis 2019; 130:104512. [PMID: 31229685 DOI: 10.1016/j.nbd.2019.104512] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 06/17/2019] [Indexed: 12/11/2022] Open
Abstract
Extracellular vesicles (EVs) are heterogeneous cell-derived membranous vesicles which carry a large diversity of molecules such as proteins and RNA species. They are now considered to be a general mode of intercellular communication by direct transfer of biomolecules. Emerging evidence demonstrates that EVs are involved in multiple pathological processes of brain diseases including neurodegenerative disorders. In this review, we investigate the current knowledge about EV biology. We also provide an overview of the roles of EVs in related brain diseases, particularly in neurodegenerative disorders. Finally, we discuss their potential applications as novel biomarkers as well as the developments of EV-based therapies.
Collapse
Affiliation(s)
- Yang You
- Department of Pharmacology and Experimental Therapeutics, Boston University School of Medicine, Boston, MA, USA
| | - Tsuneya Ikezu
- Department of Pharmacology and Experimental Therapeutics, Boston University School of Medicine, Boston, MA, USA; Neurology, Boston University School of Medicine, Boston, MA, USA.
| |
Collapse
|
112
|
Signal Exchange through Extracellular Vesicles in Neuromuscular Junction Establishment and Maintenance: From Physiology to Pathology. Int J Mol Sci 2019; 20:ijms20112804. [PMID: 31181747 PMCID: PMC6600513 DOI: 10.3390/ijms20112804] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 06/06/2019] [Indexed: 12/11/2022] Open
Abstract
Neuromuscular junction (NMJ) formation involves morphological changes both in motor terminals and muscle membrane. The molecular mechanisms leading to NMJ formation and maintenance have not yet been fully elucidated. During the last decade, it has become clear that virtually all cells release different types of extracellular vesicles (EVs), which can be taken up by nearby or distant cells modulating their activity. Initially, EVs were associated to a mechanism involved in the elimination of unwanted material; subsequent evidence demonstrated that exosomes, and more in general EVs, play a key role in intercellular communication by transferring proteins, lipids, DNA and RNA to target cells. Recently, EVs have emerged as potent carriers for Wnt, bone morphogenetic protein, miRNA secretion and extracellular traveling. Convincing evidence demonstrates that presynaptic terminals release exosomes that are taken up by muscle cells, and these exosomes can modulate synaptic plasticity in the recipient muscle cell in vivo. Furthermore, recent data highlighted that EVs could also be a potential cause of neurodegenerative disorders. Indeed, mutant SOD1, TDP-43 and FUS/TLS can be secreted by neural cells packaged into EVs and enter in neighboring neural cells, contributing to the onset and severity of the disease.
Collapse
|
113
|
Zhu Z, Kalyan BS, Chen L. Therapeutic potential role of exosomes for ischemic stroke. BRAIN SCIENCE ADVANCES 2019. [DOI: 10.26599/bsa.2019.9050013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
|
114
|
Cota-Coronado A, Díaz-Martínez NF, Padilla-Camberos E, Díaz-Martínez NE. Editing the Central Nervous System Through CRISPR/Cas9 Systems. Front Mol Neurosci 2019; 12:110. [PMID: 31191241 PMCID: PMC6546027 DOI: 10.3389/fnmol.2019.00110] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 04/15/2019] [Indexed: 12/26/2022] Open
Abstract
The translational gap to treatments based on gene therapy has been reduced in recent years because of improvements in gene editing tools, such as the CRISPR/Cas9 system and its variations. This has allowed the development of more precise therapies for neurodegenerative diseases, where access is privileged. As a result, engineering of complexes that can access the central nervous system (CNS) with the least potential inconvenience is fundamental. In this review article, we describe current alternatives to generate systems based on CRISPR/Cas9 that can cross the blood-brain barrier (BBB) and may be used further clinically to improve treatment for neurodegeneration in Parkinson's and Alzheimer's disease (AD).
Collapse
Affiliation(s)
- Agustin Cota-Coronado
- Biotecnología Médica y Farmacéutica CONACYT, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco (CIATEJ), Guadalajara, Mexico
| | | | - Eduardo Padilla-Camberos
- Biotecnología Médica y Farmacéutica CONACYT, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco (CIATEJ), Guadalajara, Mexico
| | - N Emmanuel Díaz-Martínez
- Biotecnología Médica y Farmacéutica CONACYT, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco (CIATEJ), Guadalajara, Mexico
| |
Collapse
|
115
|
Gruzdev SK, Yakovlev AA, Druzhkova TA, Guekht AB, Gulyaeva NV. The Missing Link: How Exosomes and miRNAs can Help in Bridging Psychiatry and Molecular Biology in the Context of Depression, Bipolar Disorder and Schizophrenia. Cell Mol Neurobiol 2019; 39:729-750. [PMID: 31089834 DOI: 10.1007/s10571-019-00684-6] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 05/03/2019] [Indexed: 12/21/2022]
Abstract
MicroRNAs (miRNAs) only recently have been recognized as promising molecules for both fundamental and clinical neuroscience. We provide a literature review of miRNA biomarker studies in three most prominent psychiatric disorders (depression, bipolar disorder and schizophrenia) with the particular focus on depression due to its social and healthcare importance. Our search resulted in 191 unique miRNAs across 35 human studies measuring miRNA levels in blood, serum or plasma. 30 miRNAs replicated in more than one study. Most miRNAs targeted neuroplasticity and neurodevelopment pathways. Various limitations do not allow us to make firm conclusions on clinical potential of studied miRNAs. Based on our results we discuss the rationale for future research investigations of exosomal mechanisms to overcome methodological caveats both in studying etiology and pathogenesis, and providing an objective back-up for clinical decisions.
Collapse
Affiliation(s)
- S K Gruzdev
- Institute of Medicine, RUDN University, Miklukho-Maklaya Str. 6, Moscow, Russia, 117198.
| | - A A Yakovlev
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Butlerova Str., 5A, Moscow, Russia, 117485.,Moscow Research & Clinical Center for Neuropsychiatry, Moscow Healthcare Department, Donskaya Str., 43, Moscow, Russia, 115419
| | - T A Druzhkova
- Moscow Research & Clinical Center for Neuropsychiatry, Moscow Healthcare Department, Donskaya Str., 43, Moscow, Russia, 115419
| | - A B Guekht
- Moscow Research & Clinical Center for Neuropsychiatry, Moscow Healthcare Department, Donskaya Str., 43, Moscow, Russia, 115419.,Russian National Research Medical University, Ostrovitianov Str. 1, Moscow, Russia, 117997
| | - N V Gulyaeva
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Butlerova Str., 5A, Moscow, Russia, 117485.,Moscow Research & Clinical Center for Neuropsychiatry, Moscow Healthcare Department, Donskaya Str., 43, Moscow, Russia, 115419
| |
Collapse
|
116
|
Tseng AM, Chung DD, Pinson MR, Salem NA, Eaves SE, Miranda RC. Ethanol Exposure Increases miR-140 in Extracellular Vesicles: Implications for Fetal Neural Stem Cell Proliferation and Maturation. Alcohol Clin Exp Res 2019; 43:1414-1426. [PMID: 31009095 DOI: 10.1111/acer.14066] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Accepted: 04/12/2019] [Indexed: 12/23/2022]
Abstract
BACKGROUND Neural stem cells (NSCs) generate most of the neurons of the adult brain in humans, during the mid-first through second-trimester period. This critical neurogenic window is particularly vulnerable to prenatal alcohol exposure, which can result in diminished brain growth. Previous studies showed that ethanol (EtOH) exposure does not kill NSCs, but, rather, results in their depletion by influencing cell cycle kinetics and promoting aberrant maturation, in part, by altering NSC expression of key neurogenic miRNAs. NSCs reside in a complex microenvironment rich in extracellular vesicles, shown to traffic miRNA cargo between cells. METHODS We profiled the miRNA content of extracellular vesicles from control and EtOH-exposed ex vivo neurosphere cultures of fetal NSCs. We subsequently examined the effects of one EtOH-sensitive miRNA, miR-140-3p, on NSC growth, survival, and maturation. RESULTS EtOH exposure significantly elevates levels of a subset of miRNAs in secreted extracellular vesicles. Overexpression of one of these elevated miRNAs, miR-140-3p, and its passenger strand relative, miR-140-5p, significantly increased the proportion of S-phase cells while decreasing the proportion of G0 /G1 cells compared to controls. In contrast, while miR-140-3p knockdown had minimal effects on the proportion of cells in each phase of the cell cycle, knockdown of miR-140-5p significantly decreased the proportion of cells in G2 /M phase. Furthermore, miR-140-3p overexpression, during mitogen-withdrawal-induced NSC differentiation, favors astroglial maturation at the expense of neural and oligodendrocyte differentiation. CONCLUSIONS Collectively, the dysregulated miRNA content of extracellular vesicles following EtOH exposure may result in aberrant neural progenitor cell growth and maturation, explaining brain growth deficits associated with prenatal alcohol exposure.
Collapse
Affiliation(s)
- Alexander M Tseng
- Department of Neuroscience and Experimental Therapeutics, Texas A&M University Health Science Center, Bryan, Texas
| | - Dae D Chung
- Department of Neuroscience and Experimental Therapeutics, Texas A&M University Health Science Center, Bryan, Texas
| | - Marisa R Pinson
- Department of Neuroscience and Experimental Therapeutics, Texas A&M University Health Science Center, Bryan, Texas
| | - Nihal A Salem
- Department of Neuroscience and Experimental Therapeutics, Texas A&M University Health Science Center, Bryan, Texas
| | - Sarah E Eaves
- Department of Neuroscience and Experimental Therapeutics, Texas A&M University Health Science Center, Bryan, Texas
| | - Rajesh C Miranda
- Department of Neuroscience and Experimental Therapeutics, Texas A&M University Health Science Center, Bryan, Texas
| |
Collapse
|
117
|
Zhong X, Luo C, Deng M, Zhao M. Scutellarin-treated exosomes increase claudin 5, occludin and ZO1 expression in rat brain microvascular endothelial cells. Exp Ther Med 2019; 18:33-40. [PMID: 31258635 PMCID: PMC6566032 DOI: 10.3892/etm.2019.7562] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 08/02/2018] [Indexed: 12/15/2022] Open
Abstract
Homocysteine has been reported to be an independent risk factor for stroke. Scutellarin (Scu) dilates cerebral blood vessels and promotes anti-platelet aggregation; however, the mechanism by which Scu and Scu-treated exosomes protect against cerebrovascular disease is unclear. The aim of the present study was to investigate the mechanisms underlying the effects of Scu and Scu-treated exosomes on tight junction proteins in the blood-brain barrier. Rat brain microvascular endothelial cells (RBMVECs) were cultured and divided into five groups: Control, model, Scu, exosomes derived from RBMVECs and exosomes derived from RBMVECs after Scu administration. MTT, lactate dehydrogenase (LDH) and nitric oxide (NO) assays were performed to assess cell viability and injury. Reactive oxygen species (ROS) levels were detected using spectrophotometry and immunofluorescence. Western blotting and immunofluorescence were performed to measure cluster of differentiation (CD) 63, claudin 5, occludin and tight junction protein 1 (ZO1) expression. The results revealed that treatment with Scu and Scu-treated exosomes enhanced cell viability, reduced cell injury, increased NO levels, upregulated CD63, claudin 5, occludin and ZO1, and decreased LDH and ROS levels. These data suggest that Scu and Scu-treated exosomes protect homocysteine-induced RBMVECs via increased claudin 5, occludin and ZO1 expression.
Collapse
Affiliation(s)
- Xiaoqin Zhong
- Department of Neurology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, Guangdong 510120, P.R. China.,The Second Clinical College, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510120, P.R. China.,Department of Neurology, Guangdong Provincial Academy of Chinese Medical Sciences, Guangzhou, Guangdong 510006, P.R. China
| | - Chuanjin Luo
- Department of Cardiology, The First Hospital Affiliated to Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510405, P.R. China
| | - Minzhen Deng
- Department of Neurology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, Guangdong 510120, P.R. China.,The Second Clinical College, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510120, P.R. China.,Department of Neurology, Guangdong Provincial Academy of Chinese Medical Sciences, Guangzhou, Guangdong 510006, P.R. China
| | - Min Zhao
- Department of Neurology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, Guangdong 510120, P.R. China.,The Second Clinical College, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510120, P.R. China.,Department of Neurology, Guangdong Provincial Academy of Chinese Medical Sciences, Guangzhou, Guangdong 510006, P.R. China
| |
Collapse
|
118
|
Rojalin T, Phong B, Koster HJ, Carney RP. Nanoplasmonic Approaches for Sensitive Detection and Molecular Characterization of Extracellular Vesicles. Front Chem 2019; 7:279. [PMID: 31134179 PMCID: PMC6514246 DOI: 10.3389/fchem.2019.00279] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 04/04/2019] [Indexed: 12/19/2022] Open
Abstract
All cells release a multitude of nanoscale extracellular vesicles (nEVs) into circulation, offering immense potential for new diagnostic strategies. Yet, clinical translation for nEVs remains a challenge due to their vast heterogeneity, our insufficient ability to isolate subpopulations, and the low frequency of disease-associated nEVs in biofluids. The growing field of nanoplasmonics is poised to address many of these challenges. Innovative materials engineering approaches based on exploiting nanoplasmonic phenomena, i.e., the unique interaction of light with nanoscale metallic materials, can achieve unrivaled sensitivity, offering real-time analysis and new modes of medical and biological imaging. We begin with an introduction into the basic structure and function of nEVs before critically reviewing recent studies utilizing nanoplasmonic platforms to detect and characterize nEVs. For the major techniques considered, surface plasmon resonance (SPR), localized SPR, and surface enhanced Raman spectroscopy (SERS), we introduce and summarize the background theory before reviewing the studies applied to nEVs. Along the way, we consider notable aspects, limitations, and considerations needed to apply plasmonic technologies to nEV detection and analysis.
Collapse
Affiliation(s)
- Tatu Rojalin
- Department of Biochemistry and Molecular Medicine, University of California, Davis, Davis, CA, United States
- Department of Biomedical Engineering, University of California, Davis, Davis, CA, United States
| | - Brian Phong
- Department of Biomedical Engineering, University of California, Davis, Davis, CA, United States
| | - Hanna J. Koster
- Department of Biomedical Engineering, University of California, Davis, Davis, CA, United States
| | - Randy P. Carney
- Department of Biomedical Engineering, University of California, Davis, Davis, CA, United States
| |
Collapse
|
119
|
Lee S, Mankhong S, Kang JH. Extracellular Vesicle as a Source of Alzheimer's Biomarkers: Opportunities and Challenges. Int J Mol Sci 2019; 20:ijms20071728. [PMID: 30965555 PMCID: PMC6479979 DOI: 10.3390/ijms20071728] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 04/01/2019] [Accepted: 04/01/2019] [Indexed: 12/16/2022] Open
Abstract
Alzheimer’s disease (AD) is a chronic progressive neurodegenerative disease characterized by memory decline and cognitive dysfunction. Although the primary causes of AD are not clear, it is widely accepted that the accumulation of amyloid beta (Aβ) and consecutive hyper-phosphorylation of tau, synaptic loss, oxidative stress and neuronal death might play a vital role in AD pathogenesis. Recently, it has been widely suggested that extracellular vesicles (EVs), which are released from virtually all cell types, are a mediator in regulating AD pathogenesis. Clinical evidence for the diagnostic performance of EV-associated biomarkers, particularly exosome biomarkers in the blood, is also emerging. In this review, we briefly introduce the biological function of EVs in the central nervous system and discuss the roles of EVs in AD pathogenesis. In particular, the roles of EVs associated with autophagy and lysosomal degradation systems in AD proteinopathy and in disease propagation are discussed. Next, we summarize candidates for biochemical AD biomarkers in EVs, including proteins and miRNAs. The accumulating data brings hope that the application of EVs will be helpful for early diagnostics and the identification of new therapeutic targets for AD. However, at the same time, there are several challenges in developing valid EV biomarkers. We highlight considerations for the development of AD biomarkers from circulating EVs, which includes the standardization of pre-analytical sources of variability, yield and purity of isolated EVs and quantification of EV biomarkers. The development of valid EV AD biomarkers may be facilitated by collaboration between investigators and the industry.
Collapse
Affiliation(s)
- Seongju Lee
- Department of Anatomy, College of Medicine, Inha University, Incheon 22212, Korea.
- Hypoxia-related Disease Research Center, College of Medicine, Inha University, Incheon 22212, Korea.
| | - Sakulrat Mankhong
- Hypoxia-related Disease Research Center, College of Medicine, Inha University, Incheon 22212, Korea.
- Department of Pharmacology, College of Medicine, Inha University, Incheon 22212, Korea.
| | - Ju-Hee Kang
- Hypoxia-related Disease Research Center, College of Medicine, Inha University, Incheon 22212, Korea.
- Department of Pharmacology, College of Medicine, Inha University, Incheon 22212, Korea.
| |
Collapse
|
120
|
Connecting Exosomes and Connexins. Cancers (Basel) 2019; 11:cancers11040476. [PMID: 30987321 PMCID: PMC6520873 DOI: 10.3390/cancers11040476] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 03/22/2019] [Accepted: 04/02/2019] [Indexed: 12/21/2022] Open
Abstract
Intercellular communication is accomplished by passage of ions and small molecules through gap junction channels in directly contacting cells or by secretion and response to transmitters, hormones and extracellular vesicles in cells that are distant from each other. Recent studies have suggested that there may be overlap of these processes; specifically, small extracellular vesicles may contain subunit gap junction proteins, connexins. We isolated and analyzed extracellular vesicles secreted by cultured microvascular endothelial cells. These vesicles had a diameter of ~120 nm. They contained four exosomal proteins (flotillin-1, CD63, CD81 and Alix) and the gap junction protein, connexin43. They did not contain an endoplasmic reticulum protein (Grp94) or an adherens junction protein (VE-cadherin). Secretion of vesicles was increased by treatment of the cells with staurosporine. Our data confirm that the gap junction protein, connexin43, can be secreted in vesicles with the properties of exosomes. Although the role of vesicular connexin is not clearly known, we speculate that it might participate in docking/fusion of the exosomes with the recipient cell, transmission of vesicular contents, or cellular signaling.
Collapse
|
121
|
Benmoussa A, Provost P. Milk MicroRNAs in Health and Disease. Compr Rev Food Sci Food Saf 2019; 18:703-722. [PMID: 33336926 DOI: 10.1111/1541-4337.12424] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 12/19/2018] [Accepted: 12/24/2018] [Indexed: 02/06/2023]
Abstract
MicroRNAs are small noncoding RNAs responsible for regulating 40% to 60% of gene expression at the posttranscriptional level. The discovery of circulating microRNAs in several biological fluids opened the path for their study as biomarkers and long-range cell-to-cell communication mediators. Their transfer between individuals in the case of blood transfusion, for example, and their high enrichment in milk have sparked the interest for microRNA transfer through diet, especially from mothers to infants during breastfeeding. The extension of such paradigm led to the study of milk microRNAs in the case of cow or goat milk consumption in adults. Here we provide a comprehensive critical review of the key findings surrounding milk microRNAs in human, cow, and goat milk among other species. We discuss the data on their biological properties, their use as disease biomarkers, their transfer between individuals or species, and their putative or verified functions in health and disease of infants and adult consumers. This work is based on all the literature available and integrates all the results, theories, debates, and validation studies available so far on milk microRNAs and related areas of investigations. We critically discuss the limitations and outline future aspects and avenues to explore in this rapidly growing field of research that could impact public health through infant milk formulations or new therapies. We hope that this comprehensive review of the literature will provide insight for all teams investigating milk RNAs' biological activities and help ensure the quality of future reports.
Collapse
Affiliation(s)
- Abderrahim Benmoussa
- CHUQ Research Center/CHUL, 2705 Blvd Laurier, Quebec, QC, G1V 4G2, Canada.,Dept. of Microbiology-Infectious Disease and Immunity and Faculty of Medicine, Univ. Laval, Quebec, QC, G1V 0A6, Canada
| | - Patrick Provost
- CHUQ Research Center/CHUL, 2705 Blvd Laurier, Quebec, QC, G1V 4G2, Canada.,Dept. of Microbiology-Infectious Disease and Immunity and Faculty of Medicine, Univ. Laval, Quebec, QC, G1V 0A6, Canada
| |
Collapse
|
122
|
Sexton RE, Mpilla G, Kim S, Philip PA, Azmi AS. Ras and exosome signaling. Semin Cancer Biol 2019; 54:131-137. [PMID: 30769101 DOI: 10.1016/j.semcancer.2019.02.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 01/25/2019] [Accepted: 02/11/2019] [Indexed: 02/07/2023]
Abstract
Ras gene (HRAS, NRAS, and KRAS) has been observed to be mutated and hyper-activated in a significant proportion of cancers. However, mutant Ras remains a challenging therapeutic target. Similarly, inhibition of targets upstream and downstream of Ras has shown limited clinical utility. There have been attempts to develop and deliver mutant K-Ras silencing RNAs either through their encapsulation in liposomes or nanoparticles. However, these approaches show very limited success due to the lack of stability of such carrier molecules alongside associated toxicity. There is a pressing need for the identification of better therapeutic targets for Ras or its associated pathways as well as improvements in the design of superior RNAi delivery systems to suppress mutant K-Ras. More than a decade ago, it was shown that aggregates of palmitoylated Ras isoforms (H-Ras and N-Ras) passage through the cytosol on rapidly moving nanosized particles ("rasosomes"). Fast forward a decade, considerable new knowledge has emerged in the area of small vesicles, microparticles, and exosomes. Exosomes are tiny vesicles and play a significant role in regulating cancer-related signaling pathways. Exosomes have also been studied as delivery vehicles to transport drugs, proteins, and microRNAs of choice for therapeutic purposes. K-Ras pathway proteins have been implicated in exosome biogenesis and extravasation processes. This review provides an update on the current knowledge related to K-Ras signaling and exosomes and also discusses how these tiny vesicles can be harnessed to successfully deliver the K-Ras silencing moieties.
Collapse
Affiliation(s)
- Rachel E Sexton
- Department of Oncology, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Gabriel Mpilla
- Department of Oncology, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Steve Kim
- Department of Oncology, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA
| | - Philip A Philip
- Department of Oncology, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA; Department of Pharmacology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Asfar S Azmi
- Department of Oncology, Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit, MI, USA.
| |
Collapse
|
123
|
Hurwitz SN, Olcese JM, Meckes DG. Extraction of Extracellular Vesicles from Whole Tissue. J Vis Exp 2019. [PMID: 30799860 DOI: 10.3791/59143] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Circulating and interstitial small membrane-bound extracellular vesicles (EVs) represent promising targets for the development of novel diagnostic or prognostic biomarker assays, and likely serve as important players in the progression of a vast spectrum of diseases. Current research is focused on the characterization of vesicles secreted from multiple cell and tissue types in order to better understand the role of EVs in the pathogenesis of conditions including neurodegeneration, inflammation, and cancer. However, globally consistent and reproducible techniques to isolate and purify vesicles remain in progress. Moreover, methods for extraction of EVs from solid tissue ex vivo are scarcely described. Here, we provide a detailed protocol for extracting small EVs of interest from whole fresh or frozen tissues, including brain and tumor specimens, for further characterization. We demonstrate the adaptability of this method for multiple downstream analyses, including electron microscopy and immunophenotypic characterization of vesicles, as well as quantitative mass spectrometry of EV proteins.
Collapse
Affiliation(s)
- Stephanie N Hurwitz
- Department of Biomedical Sciences, Florida State University College of Medicine
| | - James M Olcese
- Department of Biomedical Sciences, Florida State University College of Medicine;
| | - David G Meckes
- Department of Biomedical Sciences, Florida State University College of Medicine;
| |
Collapse
|
124
|
Yousefi F, Lavi Arab F, Nikkhah K, Amiri H, Mahmoudi M. Novel approaches using mesenchymal stem cells for curing peripheral nerve injuries. Life Sci 2019; 221:99-108. [PMID: 30735735 DOI: 10.1016/j.lfs.2019.01.052] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 01/15/2019] [Accepted: 01/29/2019] [Indexed: 12/23/2022]
Abstract
Peripheral nerve injury (PNI) is a common life-changing disability of peripheral nervous system with significant socioeconomic consequences. Conventional therapeutic approaches for PNI have several drawbacks such as need to autologous nerve scarifying, surplus surgery, and difficult accessibility to donor nerve; therefore, other therapeutic strategies such as mesenchymal stem cells (MSCs) therapy are getting more interesting. MSCs have been proved to be safe and efficient in numerous degenerative diseases of central and peripheral nervous systems. In this paper, we review novel biotechnological advancements in treating PNI using MSCs.
Collapse
Affiliation(s)
- Forouzan Yousefi
- Immunology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Fahimeh Lavi Arab
- Immunology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Karim Nikkhah
- Department of Neurology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Houshang Amiri
- Neurology Research Center, Kerman University of Medical Sciences, Kerman, Iran; Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, the Netherlands
| | - Mahmoud Mahmoudi
- Immunology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Immunology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
| |
Collapse
|
125
|
Janas T, Sapoń K, Stowell MHB, Janas T. Selection of Membrane RNA Aptamers to Amyloid Beta Peptide: Implications for Exosome-Based Antioxidant Strategies. Int J Mol Sci 2019; 20:ijms20020299. [PMID: 30642129 PMCID: PMC6359565 DOI: 10.3390/ijms20020299] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 12/28/2018] [Accepted: 01/07/2019] [Indexed: 12/12/2022] Open
Abstract
The distribution of amyloid beta peptide 42 (Aβ42) between model exosomal membranes and a buffer solution was measured. The model membranes contained liquid-ordered regions or phosphatidylserine. Results demonstrated that up to ca. 20% of amyloid peptide, generated in the plasma (or intracellular) membrane as a result of proteolytic cleavage of amyloid precursor proteins by β- and γ-secretases, can stay within the membrane milieu. The selection of RNA aptamers that bind to Aβ42 incorporated into phosphatidylserine-containing liposomal membranes was performed using the selection-amplification (SELEX) method. After eight selection cycles, the pool of RNA aptamers was isolated and its binding to Aβ42-containing membranes was demonstrated using the gel filtration method. Since membranes can act as a catalytic surface for Aβ42 aggregation, these RNA aptamers may inhibit the formation of toxic amyloid aggregates that can permeabilize cellular membranes or disrupt membrane receptors. Strategies are proposed for using functional exosomes, loaded with RNA aptamers specific to membrane Aβ42, to reduce the oxidative stress in Alzheimer's disease and Down's syndrome.
Collapse
Affiliation(s)
- Teresa Janas
- Institute of Biotechnology, University of Opole, Kominka 6, 45-032 Opole, Poland.
| | - Karolina Sapoń
- Institute of Biotechnology, University of Opole, Kominka 6, 45-032 Opole, Poland.
| | - Michael H B Stowell
- Department of MCD Biology, University of Colorado, Boulder, CO 80309, USA.
- Mechanical Engineering, University of Colorado, Boulder, CO 80309, USA.
| | - Tadeusz Janas
- Institute of Biotechnology, University of Opole, Kominka 6, 45-032 Opole, Poland.
- Department of MCD Biology, University of Colorado, Boulder, CO 80309, USA.
| |
Collapse
|
126
|
Biogenesis of Extracellular Vesicles during Herpes Simplex Virus 1 Infection: Role of the CD63 Tetraspanin. J Virol 2019; 93:JVI.01850-18. [PMID: 30355691 DOI: 10.1128/jvi.01850-18] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 10/16/2018] [Indexed: 12/20/2022] Open
Abstract
Herpes simplex virus 1 (HSV-1) infections afflict more than 80% of the population worldwide. The virus primarily infects mucoepithelial cells and establishes latent reservoirs in neurons in sensory ganglia. Frequent reactivation has been linked to severe diseases, especially in immunocompromised individuals. Earlier, we reported that viral and host factors are packaged in extracellular vesicles (EVs) and delivered to uninfected cells, where they activate antiviral responses and restrict virus infection. Here, we interrogated the effect of HSV-1 infection on EV biogenesis. We found that HSV-1 infection causes a decrease in the amount of intracellular CD63 protein with a concomitant increase in extracellular CD63. This observation correlates with our previous finding that infected cells release more CD63-positive EVs than uninfected cells. The stimulation of CD63 exocytosis requires virus replication. CD63 is a member of the tetraspanin family of proteins that traffics between the plasma membrane and endosomal compartments and has a role in sorting cargo into the EVs. Previously, we reported that in cells depleted of CD63, HSV-1 virus yields increased, and here we provide data showing that in cells overexpressing CD63, HSV-1 virus yields decreased. Taken together, our data indicate that CD63 negatively impacts HSV-1 infection and that the CD63-positive EVs could control the dissemination of the virus in the host. Perhaps EV release by HSV-1-infected cells is a mechanism that controls virus dissemination.IMPORTANCE Intercellular communication, especially in neurons, largely relies on EVs, and modulation of EVs is known to impact physiological processes. Here, we present evidence that HSV-1 infection causes major alterations in the biogenesis of EVs, including an increase in their number and an increase in the CD63-positive population of EVs. These alterations result in an enrichment of the milieu of infection with EVs carrying signatures from infected cells. In addition to changes in the origin and type, EVs released by infected cells have differences in cargo, as they carry viral and host factors determined by the virus. The tetraspanin CD63 negatively impacts the infection, as demonstrated by CD63-knockdown and overexpression assays. A proposed mechanism involves the activation of antiviral responses in cells receiving CD63-positive EVs released by infected cells. Overall, HSV-1 causes major alterations in EVs that could contribute to HSV-1 persistence and pathogenesis.
Collapse
|
127
|
Adolf A, Rohrbeck A, Münster-Wandowski A, Johansson M, Kuhn HG, Kopp MA, Brommer B, Schwab JM, Just I, Ahnert-Hilger G, Höltje M. Release of astroglial vimentin by extracellular vesicles: Modulation of binding and internalization of C3 transferase in astrocytes and neurons. Glia 2018; 67:703-717. [PMID: 30485542 DOI: 10.1002/glia.23566] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 10/15/2018] [Accepted: 10/19/2018] [Indexed: 12/24/2022]
Abstract
Clostridium botulinum C3 transferase (C3bot) ADP-ribosylates rho proteins to change cellular functions in a variety of cell types including astrocytes and neurons. The intermediate filament protein vimentin as well as transmembrane integrins are involved in internalization of C3bot into cells. The exact contribution, however, of these proteins to binding of C3bot to the cell surface and subsequent cellular uptake remains to be unraveled. By comparing primary astrocyte cultures derived from wild-type with Vim-/- mice, we demonstrate that astrocytes lacking vimentin exhibited a delayed ADP-ribosylation of rhoA concurrent with a blunted morphological response. This functional impairment was rescued by the extracellular excess of recombinant vimentin. Binding assays using C3bot harboring a mutated integrin-binding RGD motif (C3bot-G89I) revealed the involvement of integrins in astrocyte binding of C3bot. Axonotrophic effects of C3bot are vimentin dependent and postulate an underlying mechanism entertaining a molecular cross-talk between astrocytes and neurons. We present functional evidence for astrocytic release of vimentin by exosomes using an in vitro scratch wound model. Exosomal vimentin+ particles released from wild-type astrocytes promote the interaction of C3bot with neuronal membranes. This effect vanished when culturing Vim-/- astrocytes. Specificity of these findings was confirmed by recombinant vimentin propagating enhanced binding of C3bot to synaptosomes from rat spinal cord and mouse brain. We hypothesize that vimentin+ exosomes released by reactive astrocytes provide a novel molecular mechanism constituting axonotrophic (neuroprotective) and plasticity augmenting effects of C3bot after spinal cord injury.
Collapse
Affiliation(s)
- Andrej Adolf
- Institute of Integrative Neuroanatomy, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Astrid Rohrbeck
- Institute of Toxicology, Hannover Medical School (MHH), Hanover, Germany
| | - Agnieszka Münster-Wandowski
- Institute of Integrative Neuroanatomy, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Malin Johansson
- Department of Clinical Neuroscience at Institute of Neuroscience and Physiology, University of Gothenburg, Gothenburg, Sweden
| | - Hans-Georg Kuhn
- Department of Clinical Neuroscience at Institute of Neuroscience and Physiology, University of Gothenburg, Gothenburg, Sweden.,Department of Neurology and Experimental Neurology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Marcel Alexander Kopp
- Department of Neurology and Experimental Neurology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,Berlin Institute of Health, QUEST - Center for Transforming Biomedical Research, Berlin, Germany
| | - Benedikt Brommer
- Department of Neurology and Experimental Neurology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Jan Markus Schwab
- Department of Neurology and Experimental Neurology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.,Paraplegiology (Spinal Cord Injury Division), Belford Spinal Cord Injury Center, Departments of Neurology, Neuroscience and Physical Medicine and Rehabilitation, The Neurological Institute, The Ohio State University, Wexner Medical Center, Columbus, Ohio
| | - Ingo Just
- Institute of Toxicology, Hannover Medical School (MHH), Hanover, Germany
| | - Gudrun Ahnert-Hilger
- Institute of Integrative Neuroanatomy, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Markus Höltje
- Institute of Integrative Neuroanatomy, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| |
Collapse
|
128
|
Extracellular Vesicles and Matrix Remodeling Enzymes: The Emerging Roles in Extracellular Matrix Remodeling, Progression of Diseases and Tissue Repair. Cells 2018; 7:cells7100167. [PMID: 30322133 PMCID: PMC6210724 DOI: 10.3390/cells7100167] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 09/17/2018] [Accepted: 10/12/2018] [Indexed: 12/21/2022] Open
Abstract
Extracellular vesicles (EVs) are membrane enclosed micro- and nano-sized vesicles that are secreted from almost every species, ranging from prokaryotes to eukaryotes, and from almost every cell type studied so far. EVs contain repertoire of bioactive molecules such as proteins (including enzymes and transcriptional factors), lipids, carbohydrates and nucleic acids including DNA, coding and non-coding RNAs. The secreted EVs are taken up by neighboring cells where they release their content in recipient cells, or can sail through body fluids to reach distant organs. Since EVs transport bioactive cargo between cells, they have emerged as novel mediators of extra- and intercellular activities in local microenvironment and inter-organ communications distantly. Herein, we review the activities of EV-associated matrix-remodeling enzymes such as matrix metalloproteinases, heparanases, hyaluronidases, aggrecanases, and their regulators such as extracellular matrix metalloproteinase inducers and tissue inhibitors of metalloproteinases as novel means of matrix remodeling in physiological and pathological conditions. We discuss how such EVs act as novel mediators of extracellular matrix degradation to prepare a permissive environment for various pathological conditions such as cancer, cardiovascular diseases, arthritis and metabolic diseases. Additionally, the roles of EV-mediated matrix remodeling in tissue repair and their potential applications as organ therapies have been reviewed. Collectively, this knowledge could benefit the development of new approaches for tissue engineering.
Collapse
|
129
|
Tang BL. Promoting axonal regeneration through exosomes: An update of recent findings on exosomal PTEN and mTOR modifiers. Brain Res Bull 2018; 143:123-131. [DOI: 10.1016/j.brainresbull.2018.10.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 10/13/2018] [Accepted: 10/18/2018] [Indexed: 12/11/2022]
|
130
|
Mrowczynski OD, Zacharia BE, Connor JR. Exosomes and their implications in central nervous system tumor biology. Prog Neurobiol 2018; 172:71-83. [PMID: 30003942 DOI: 10.1016/j.pneurobio.2018.06.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 05/04/2018] [Accepted: 06/30/2018] [Indexed: 01/08/2023]
Abstract
Exosomes are 20-100 nm cellular derived vesicles that upon discovery, were thought to be a form of cellular recycling of intracellular contents. More recently, these vesicles are under investigation for their purported significant roles in intercellular communication in both healthy and diseased states. Herein, we focus on the secretion of exosomes associated with glioblastoma, as most exosome studies on brain tumors have been performed in this tumor type. However, we included exosomes secreted from other forms of brain tumors for comparison as available. Exosomes contain intracellular content that can be transferred to other cells in the tumor or to cells of the immune system and endothelial cells. These recipient cells may subsequently take on oncogenic properties, including therapeutic resistance, cancer progression, and angiogenesis. Genetic components (DNA, RNA and miRNA) of the cell of origin may be included in the secreted exosomes. The presence of genetic material in the exosomes could serve as a biomarker for mutations in tumors, potentially leading to novel treatment strategies. In the last decade, exosomes have been identified as having a major impact on multiple aspects of medicine and tumor biology, and appear to be primed for a critical position in cancer diagnosis, prognosis, and treatment.
Collapse
Affiliation(s)
- Oliver D Mrowczynski
- Department of Neurosurgery, Pennsylvania State University College of Medicine, Hershey, PA 17033, United States
| | - Brad E Zacharia
- Department of Neurosurgery, Pennsylvania State University College of Medicine, Hershey, PA 17033, United States
| | - James R Connor
- Department of Neurosurgery, Pennsylvania State University College of Medicine, Hershey, PA 17033, United States.
| |
Collapse
|
131
|
Tang BL. Unconventional Secretion and Intercellular Transfer of Mutant Huntingtin. Cells 2018; 7:cells7060059. [PMID: 29904030 PMCID: PMC6025013 DOI: 10.3390/cells7060059] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 06/08/2018] [Accepted: 06/12/2018] [Indexed: 01/17/2023] Open
Abstract
The mechanism of intercellular transmission of pathological agents in neurodegenerative diseases has received much recent attention. Huntington’s disease (HD) is caused by a monogenic mutation in the gene encoding Huntingtin (HTT). Mutant HTT (mHTT) harbors a CAG repeat extension which encodes an abnormally long polyglutamine (polyQ) repeat at HTT’s N-terminus. Neuronal pathology in HD is largely due to the toxic gain-of-function by mHTT and its proteolytic products, which forms both nuclear and cytoplasmic aggregates that perturb nuclear gene transcription, RNA splicing and transport as well cellular membrane dynamics. The neuropathological effects of mHTT have been conventionally thought to be cell-autonomous in nature. Recent findings have, however, indicated that mHTT could be secreted by neurons, or transmitted from one neuronal cell to another via different modes of unconventional secretion, as well as via tunneling nanotubes (TNTs). These modes of transmission allow the intercellular spread of mHTT and its aggregates, thus plausibly promoting neuropathology within proximal neuronal populations and between neurons that are connected within neural circuits. Here, the various possible modes for mHTT’s neuronal cell exit and intercellular transmission are discussed.
Collapse
Affiliation(s)
- Bor Luen Tang
- Department of Biochemistry, Yong Loo Lin School of Medicine, 117597 Singapore, Singapore.
- NUS Graduate School for Integrative Sciences and Engineering, 117456 Singapore, Singapore.
| |
Collapse
|
132
|
Hurwitz SN, Sun L, Cole KY, Ford CR, Olcese JM, Meckes DG. An optimized method for enrichment of whole brain-derived extracellular vesicles reveals insight into neurodegenerative processes in a mouse model of Alzheimer's disease. J Neurosci Methods 2018; 307:210-220. [PMID: 29894726 DOI: 10.1016/j.jneumeth.2018.05.022] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 05/18/2018] [Accepted: 05/29/2018] [Indexed: 01/11/2023]
Abstract
BACKGROUND Alzheimer's disease (AD) is the major cause of dementia that has increased dramatically in prevalence over the past several decades. Yet many questions still surround the etiology of AD. Recently, extracellular vesicles (EVs) that transport protein, lipid, and nucleic acids from cell to cell have been implicated in the clearance and propagation of misfolded proteins. Investigation of EVs in AD progression, and their potential diagnostic utility may contribute to understanding and treating AD. However, the challenges of isolating brain-derived EVs have in part hindered these studies. NEW METHOD Here, we provide an optimized method for the enrichment of brain-derived EVs by iodixanol floatation density gradient for mass spectrometry analysis. RESULTS We demonstrate the isolation of these vesicles and the enrichment of EV proteins compared to sedimentation gradient isolation of vesicles. Moreover, comparative proteomic analysis of brain-derived EVs from healthy and AD mouse brains revealed differences in vesicular content including proteins involved in aging, immune response, and oxidation-reduction maintenance. These changes provide insight into AD-associated neurodegeneration and potential biomarkers of AD. Comparison with existing methods: Recent techniques have used sedimentation sucrose gradients to isolate EVs from brain tissue. However, here we demonstrate the advantages of floatation iodixanol density gradient isolation of small EVs, and provide evidence of EV enrichment by electron microscopy, immunoblot analysis, and quantitative mass spectrometry. CONCLUSIONS Together these findings offer a rigorous technique for enriching whole tissue-derived EVs for downstream analyses, and application of this approach to uncovering molecular changes in AD progression and other neurological conditions.
Collapse
Affiliation(s)
- Stephanie N Hurwitz
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL, 32306, United States
| | - Li Sun
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL, 32306, United States
| | - Kalonji Y Cole
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL, 32306, United States
| | - Charles R Ford
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL, 32306, United States
| | - James M Olcese
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL, 32306, United States.
| | - David G Meckes
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL, 32306, United States.
| |
Collapse
|
133
|
Litwińska Z, Łuczkowska K, Machaliński B. Extracellular vesicles in hematological malignancies. Leuk Lymphoma 2018; 60:29-36. [DOI: 10.1080/10428194.2018.1459606] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Zofia Litwińska
- Department of General Pathology, Pomeranian Medical University, Szczecin, Poland
| | - Karolina Łuczkowska
- Department of General Pathology, Pomeranian Medical University, Szczecin, Poland
| | - Bogusław Machaliński
- Department of General Pathology, Pomeranian Medical University, Szczecin, Poland
| |
Collapse
|
134
|
Sedgwick AE, D'Souza-Schorey C. The biology of extracellular microvesicles. Traffic 2018; 19:319-327. [PMID: 29479795 PMCID: PMC6922305 DOI: 10.1111/tra.12558] [Citation(s) in RCA: 156] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 02/16/2018] [Accepted: 02/16/2018] [Indexed: 12/11/2022]
Abstract
The study of extracellular vesicles (EVs) is a rapidly evolving field, owing in large part to recent advances in the realization of their significant contributions to normal physiology and disease. Once discredited as cell debris, these membrane vesicles have now emerged as mediators of intercellular communication by interaction with target cells, drug and gene delivery, and as potentially versatile platforms of clinical biomarkers as a result of their distinctive protein, nucleic acid and lipid cargoes. While there are multiple classes of EVs released from almost all cell types, here we focus primarily on the biogenesis, fate and functional cargoes of microvesicles (MVs). MVs regulate many important cellular processes including facilitating cell invasion, cell growth, evasion of immune response, stimulating angiogenesis, drug resistance and many others.
Collapse
Affiliation(s)
- Alanna E Sedgwick
- Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana
| | | |
Collapse
|
135
|
Abdulrahman BA, Abdelaziz DH, Schatzl HM. Autophagy regulates exosomal release of prions in neuronal cells. J Biol Chem 2018; 293:8956-8968. [PMID: 29700113 PMCID: PMC5995502 DOI: 10.1074/jbc.ra117.000713] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 04/19/2018] [Indexed: 12/29/2022] Open
Abstract
Prions are protein-based infectious agents that autocatalytically convert the cellular prion protein PrPC to its pathological isoform PrPSc. Subsequent aggregation and accumulation of PrPSc in nervous tissues causes several invariably fatal neurodegenerative diseases in humans and animals. Prions can infect recipient cells when packaged into endosome-derived nanoparticles called exosomes, which are present in biological fluids such as blood, urine, and saliva. Autophagy is a basic cellular degradation and recycling machinery that also affects exosomal processing, but whether autophagy controls release of prions in exosomes is unclear. Our work investigated the effect of autophagy modulation on exosomal release of prions and how this interplay affects cellular prion infection. Exosomes isolated from cultured murine central neuronal cells (CAD5) and peripheral neuronal cells (N2a) contained prions as shown by immunoblotting for PrPSc, prion-conversion activity, and cell culture infection. We observed that autophagy stimulation with the mTOR inhibitor rapamycin strongly inhibited exosomal prion release. In contrast, inhibition of autophagy by wortmannin or CRISPR/Cas9-mediated knockout of the autophagy protein Atg5 (autophagy-related 5) greatly increased the release of exosomes and exosome-associated prions. We also show that a difference in exosomal prion release between CAD5 and N2a cells is related to differences at the level of basal autophagy. Taken together, our results indicate that autophagy modulation can control lateral transfer of prions by interfering with their exosomal release. We describe a novel role of autophagy in the prion life cycle, an understanding that may provide useful targets for containing prion diseases.
Collapse
Affiliation(s)
- Basant A Abdulrahman
- From the Department of Comparative Biology & Experimental Medicine and.,the Calgary Prion Research Unit, University of Calgary, Calgary, Alberta T2N 4Z6, Canada.,the Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Helwan University, 11795 Cairo, Egypt, and
| | - Dalia H Abdelaziz
- From the Department of Comparative Biology & Experimental Medicine and.,the Calgary Prion Research Unit, University of Calgary, Calgary, Alberta T2N 4Z6, Canada.,the Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, Helwan University, 11795 Cairo, Egypt, and
| | - Hermann M Schatzl
- From the Department of Comparative Biology & Experimental Medicine and .,the Calgary Prion Research Unit, University of Calgary, Calgary, Alberta T2N 4Z6, Canada.,the Departments of Veterinary Sciences and of Molecular Biology, University of Wyoming, Laramie, Wyoming 82071
| |
Collapse
|
136
|
|
137
|
Crosstalk of Nanosystems Induced Extracellular Vesicles as Promising Tools in Biomedical Applications. J Membr Biol 2017; 250:605-616. [PMID: 29127486 DOI: 10.1007/s00232-017-0003-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 11/06/2017] [Indexed: 02/06/2023]
Abstract
Hybrid vesicles are considered as a bridge between natural nanosystems (NNSs) and artificial nanosystems (ANSs). NNSs are extracellular vesicles (EVs), membranous, bio-formed endogenously, which act as endogenous cargoes, and reflecting cellular dynamics. EVs have cellular tropism, permeate tight junctions, and are non-immunogenic. EVs are used as tools in the development of diagnostic and therapeutic agents. ANSs can induce biogenesis of hybrid vesicles as promising smart diagnostic agents, and innovative drug cargoes. EVs can encapsulate small molecules, macromolecules, and ANSs. The manipulation of EVs during biogenesis was suggested for engineering hybrid EVs. This review article highlights the role of ANSs in the biogenesis of NNSs, and introduces hybrid nanosystems research.
Collapse
|
138
|
Bioinformatics Genes and Pathway Analysis for Chronic Neuropathic Pain after Spinal Cord Injury. BIOMED RESEARCH INTERNATIONAL 2017; 2017:6423021. [PMID: 29164149 PMCID: PMC5661087 DOI: 10.1155/2017/6423021] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 08/09/2017] [Accepted: 09/07/2017] [Indexed: 12/11/2022]
Abstract
It is well known spinal cord injury (SCI) can cause chronic neuropathic pain (NP); however its underlying molecular mechanisms remain elusive. This study aimed to disclose differentially expressed genes (DEGs) and activated signaling pathways in association with SCI induced chronic NP, in order to identify its diagnostic and therapeutic targets. Microarray dataset GSE5296 has been downloaded from Gene Expression Omnibus (GEO) database. Significant analysis of microarray (SAM), Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis, and pathway network analysis have been used to compare changes of DEGs and signaling pathways between the SCI and sham-injury group. As a result, DEGs analysis showed there were 592 DEGs with significantly altered expression; among them Ccl3 expression showed the highest upregulation which implicated its association with SCI induced chronic NP. Moreover, KEGG analysis found 209 pathways changed significantly; among them the most significantly activated one is MAPK signaling pathway, which is in line with KEGG analysis results. Our results show Ccl3 is highly associated with SCI induced chronic NP; as the exosomes with Ccl3 can be easily and efficiently detected in peripheral blood, Ccl3 may serve as a potential prognostic target for the diagnosis and treatment of SCI induced chronic NP.
Collapse
|
139
|
Lisak RP, Nedelkoska L, Benjamins JA, Schalk D, Bealmear B, Touil H, Li R, Muirhead G, Bar-Or A. B cells from patients with multiple sclerosis induce cell death via apoptosis in neurons in vitro. J Neuroimmunol 2017; 309:88-99. [DOI: 10.1016/j.jneuroim.2017.05.004] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 05/09/2017] [Accepted: 05/10/2017] [Indexed: 12/26/2022]
|
140
|
Abstract
Extracellular vesicles, such as exosomes and microvesicles, are host cell-derived packages of information that allow cell-cell communication and enable cells to rid themselves of unwanted substances. The release and uptake of extracellular vesicles has important physiological functions and may also contribute to the development and propagation of inflammatory, vascular, malignant, infectious and neurodegenerative diseases. This Review describes the different types of extracellular vesicles, how they are detected and the mechanisms by which they communicate with cells and transfer information. We also describe their physiological functions in cellular interactions, such as in thrombosis, immune modulation, cell proliferation, tissue regeneration and matrix modulation, with an emphasis on renal processes. We discuss how the detection of extracellular vesicles could be utilized as biomarkers of renal disease and how they might contribute to disease processes in the kidney, such as in acute kidney injury, chronic kidney disease, renal transplantation, thrombotic microangiopathies, vasculitides, IgA nephropathy, nephrotic syndrome, urinary tract infection, cystic kidney disease and tubulopathies. Finally, we consider how the release or uptake of extracellular vesicles can be blocked, as well as the associated benefits and risks, and how extracellular vesicles might be used to treat renal diseases by delivering therapeutics to specific cells.
Collapse
Affiliation(s)
- Diana Karpman
- Department of Pediatrics, Clinical Sciences Lund, Lund University, Klinikgatan 28, 22184 Lund, Sweden
| | - Anne-Lie Ståhl
- Department of Pediatrics, Clinical Sciences Lund, Lund University, Klinikgatan 28, 22184 Lund, Sweden
| | - Ida Arvidsson
- Department of Pediatrics, Clinical Sciences Lund, Lund University, Klinikgatan 28, 22184 Lund, Sweden
| |
Collapse
|
141
|
Zhang G, Yang P. A novel cell-cell communication mechanism in the nervous system: exosomes. J Neurosci Res 2017; 96:45-52. [DOI: 10.1002/jnr.24113] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 06/12/2017] [Accepted: 06/15/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Guan Zhang
- Department of Neurobiology, Chongqing Key Laboratory of Neurobiology; Third Military Medical University; Chongqing 400038 P.R. China
- Cadet Brigade; Third Military Medical University; Chongqing 400038 P.R. China
| | - Ping Yang
- Department of Neurobiology, Chongqing Key Laboratory of Neurobiology; Third Military Medical University; Chongqing 400038 P.R. China
| |
Collapse
|
142
|
Saugstad JA, Lusardi TA, Van Keuren-Jensen KR, Phillips JI, Lind B, Harrington CA, McFarland TJ, Courtright AL, Reiman RA, Yeri AS, Kalani MYS, Adelson PD, Arango J, Nolan JP, Duggan E, Messer K, Akers JC, Galasko DR, Quinn JF, Carter BS, Hochberg FH. Analysis of extracellular RNA in cerebrospinal fluid. J Extracell Vesicles 2017; 6:1317577. [PMID: 28717417 PMCID: PMC5505019 DOI: 10.1080/20013078.2017.1317577] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Indexed: 12/12/2022] Open
Abstract
We examined the extracellular vesicle (EV) and RNA composition of pooled normal cerebrospinal fluid (CSF) samples and CSF from five major neurological disorders: Alzheimer’s disease (AD), Parkinson’s disease (PD), low-grade glioma (LGG), glioblastoma multiforme (GBM), and subarachnoid haemorrhage (SAH), representing neurodegenerative disease, cancer, and severe acute brain injury. We evaluated: (I) size and quantity of EVs by nanoparticle tracking analysis (NTA) and vesicle flow cytometry (VFC), (II) RNA yield and purity using four RNA isolation kits, (III) replication of RNA yields within and between laboratories, and (IV) composition of total and EV RNAs by reverse transcription–quantitative polymerase chain reaction (RT-qPCR) and RNA sequencing (RNASeq). The CSF contained ~106 EVs/μL by NTA and VFC. Brain tumour and SAH CSF contained more EVs and RNA relative to normal, AD, and PD. RT-qPCR and RNASeq identified disease-related populations of microRNAs and messenger RNAs (mRNAs) relative to normal CSF, in both total and EV fractions. This work presents relevant measures selected to inform the design of subsequent replicative CSF studies. The range of neurological diseases highlights variations in total and EV RNA content due to disease or collection site, revealing critical considerations guiding the selection of appropriate approaches and controls for CSF studies.
Collapse
Affiliation(s)
- Julie A Saugstad
- Department of Anesthesiology & Perioperative Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Theresa A Lusardi
- Bioinformatics Core, School of Medicine, Oregon Health & Science University, Portland, OR, USA
| | | | - Jay I Phillips
- Department of Anesthesiology & Perioperative Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Babett Lind
- Department of Neurology, Layton Aging and Alzheimer's Center, Oregon Health & Science University, Portland, OR, USA
| | | | - Trevor J McFarland
- Integrated Genomics Laboratory, Oregon Health & Science University, Portland, OR, USA
| | | | - Rebecca A Reiman
- Neurogenomics, Translational Genomics Research Institute,Phoenix, AZ, USA
| | - Ashish S Yeri
- Neurogenomics, Translational Genomics Research Institute,Phoenix, AZ, USA
| | - M Yashar S Kalani
- Department of Neurosurgery, Radiology, Anatomy and Neurobiology, University of Utah School of Medicine and the Barrow Neurological Institute, Salt Lake City, UT, USA
| | - P David Adelson
- Barrow Neurological Institute at Phoenix Children's Hospital, Department of Child Health, University of Arizona College of Medicine, Phoenix, AZ, USA
| | - Jorge Arango
- Barrow Neurological Institute at Phoenix Children's Hospital, Department of Child Health, University of Arizona College of Medicine, Phoenix, AZ, USA
| | | | | | - Karen Messer
- Division of Biostatistics and Bioinformatics, University of California, San Diego, CA, USA
| | - Johnny C Akers
- Department of Neurosurgery, University of California, San Diego, CA, USA
| | - Douglas R Galasko
- Department of Neurosciences, University of California, San Diego, CA, USA
| | - Joseph F Quinn
- Department of Neurology, Portland VA Medical Center, Oregon Health & Science University, Portland, OR, USA
| | - Bob S Carter
- Department of Neurosurgery, University of California, San Diego, CA, USA
| | - Fred H Hochberg
- Department of Neurosurgery, University of California, San Diego, CA, USA
| |
Collapse
|
143
|
Eitan E, Green J, Bodogai M, Mode NA, Bæk R, Jørgensen MM, Freeman DW, Witwer KW, Zonderman AB, Biragyn A, Mattson MP, Noren Hooten N, Evans MK. Age-Related Changes in Plasma Extracellular Vesicle Characteristics and Internalization by Leukocytes. Sci Rep 2017; 7:1342. [PMID: 28465537 PMCID: PMC5430958 DOI: 10.1038/s41598-017-01386-z] [Citation(s) in RCA: 164] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 03/29/2017] [Indexed: 01/18/2023] Open
Abstract
Cells release lipid-bound extracellular vesicles (EVs; exosomes, microvesicles and apoptotic bodies) containing proteins, lipids and RNAs into the circulation. Vesicles mediate intercellular communication between both neighboring and distant cells. There is substantial interest in using EVs as biomarkers for age-related diseases including cancer, and neurodegenerative, metabolic and cardiovascular diseases. The majority of research focuses on identifying differences in EVs when comparing disease states and matched controls. Here, we analyzed circulating plasma EVs in a cross-sectional and longitudinal study in order to address age-related changes in community-dwelling individuals. We found that EV concentration decreases with advancing age. Furthermore, EVs from older individuals were more readily internalized by B cells and increased MHC-II expression on monocytes compared with EVs from younger individuals, indicating that the decreased concentration of EVs with age may be due in part to increased internalization. EVs activated both monocytes and B cells, and activation of B cells by LPS enhanced EV internalization. We also report a relative stability of EV concentration and protein amount in individual subjects over time. Our data provide important information towards establishing a profile of EVs with human age, which will further aid in the development of EV-based diagnostics for aging and age-related diseases.
Collapse
Affiliation(s)
- Erez Eitan
- Laboratory of Neurosciences, 251 Bayview Boulevard, Baltimore, MD, 21224, USA
| | - Jamal Green
- Laboratory of Epidemiology and Population Science, 251 Bayview Boulevard, Baltimore, MD, 21224, USA
| | - Monica Bodogai
- Laboratory of Molecular Biology and Immunology, National Institute on Aging, National Institutes of Health, 251 Bayview Boulevard, Baltimore, MD, 21224, USA
| | - Nicolle A Mode
- Laboratory of Epidemiology and Population Science, 251 Bayview Boulevard, Baltimore, MD, 21224, USA
| | - Rikke Bæk
- Department of Clinical Immunology, part of EVSearch.dk, Aalborg University Hospital, Aalborg, Denmark
| | - Malene M Jørgensen
- Department of Clinical Immunology, part of EVSearch.dk, Aalborg University Hospital, Aalborg, Denmark
| | - David W Freeman
- Laboratory of Epidemiology and Population Science, 251 Bayview Boulevard, Baltimore, MD, 21224, USA
| | - Kenneth W Witwer
- Department of Molecular and Comparative Pathobiology, and Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Alan B Zonderman
- Laboratory of Epidemiology and Population Science, 251 Bayview Boulevard, Baltimore, MD, 21224, USA
| | - Arya Biragyn
- Laboratory of Molecular Biology and Immunology, National Institute on Aging, National Institutes of Health, 251 Bayview Boulevard, Baltimore, MD, 21224, USA
| | - Mark P Mattson
- Laboratory of Neurosciences, 251 Bayview Boulevard, Baltimore, MD, 21224, USA
| | - Nicole Noren Hooten
- Laboratory of Epidemiology and Population Science, 251 Bayview Boulevard, Baltimore, MD, 21224, USA.
| | - Michele K Evans
- Laboratory of Epidemiology and Population Science, 251 Bayview Boulevard, Baltimore, MD, 21224, USA
| |
Collapse
|
144
|
Sarko DK, McKinney CE. Exosomes: Origins and Therapeutic Potential for Neurodegenerative Disease. Front Neurosci 2017; 11:82. [PMID: 28289371 PMCID: PMC5326777 DOI: 10.3389/fnins.2017.00082] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Accepted: 02/06/2017] [Indexed: 12/21/2022] Open
Abstract
Exosomes, small lipid bilayer vesicles, are part of the transportable cell secretome that can be taken up by nearby recipient cells or can travel through the bloodstream to cells in distant organs. Selected cellular cytoplasm containing proteins, RNAs, and other macromolecules is packaged into secreted exosomes. This cargo has the potential to affect cellular function in either healthy or pathological ways. Exosomal content has been increasingly shown to assist in promoting pathways of neurodegeneration such as β-amyloid peptide (Aβ) accumulation forming amyloid plaques in the brains of patients with Alzheimer's disease, and pathological aggregates of proteins containing α-synuclein in Parkinson's disease transferred to the central nervous system via exosomes. In attempting to address such debilitating neuropathologies, one promising utility of exosomes lies in the development of methodology to use exosomes as natural delivery vehicles for therapeutics. Because exosomes are capable of penetrating the blood-brain barrier, they can be strategically engineered to carry drugs or other treatments, and possess a suitable half-life and stability for this purpose. Overall, analyses of the roles that exosomes play between diverse cellular sites will refine our understanding of how cells communicate. This mini-review introduces the origin and biogenesis of exosomes, their roles in neurodegenerative processes in the central nervous system, and their potential utility to deliver therapeutic drugs to cellular sites.
Collapse
Affiliation(s)
- Diana K. Sarko
- Department of Anatomy, Southern Illinois University School of MedicineCarbondale, IL, USA
| | - Cindy E. McKinney
- Department of Genetics and iPSC Stem Cell Lab, Edward Via College of Osteopathic MedicineSpartanburg, SC, USA
| |
Collapse
|
145
|
Xiao T, Zhang W, Jiao B, Pan CZ, Liu X, Shen L. The role of exosomes in the pathogenesis of Alzheimer' disease. Transl Neurodegener 2017; 6:3. [PMID: 28184302 PMCID: PMC5289036 DOI: 10.1186/s40035-017-0072-x] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 01/12/2017] [Indexed: 12/31/2022] Open
Abstract
Exosomes are small vesicles secreted by most cell types including neurons that function in intercellular communication through transfer of their cargo or encapsulate and eliminate unnecessary cellular components and therefore have a broad impact on nerve development, activation and regeneration. In addition, exosomes have been observed to be involved in spreading pathological misfolded proteins, thereby leading to the onset and propagation of disease. Alzheimer disease (AD) is the most common form of dementia and characterized by two types of lesions: amyloid plaques and neurofibrillary tangles. Accumulating evidence has demonstrated that exosomes are associated with amyloid precursor (APP) and Tau proteins and play a controversial role in Alzheimer’s disease process. In this review, we will discuss the role of exosomes in the metabolism and secretion of APP and Tau proteins and their subsequent impact on AD pathogenesis.
Collapse
Affiliation(s)
- Tingting Xiao
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Weiwei Zhang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Bin Jiao
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Chu-Zheng Pan
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Xixi Liu
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Lu Shen
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China.,State Key Laboratory of Medical Genetics, Changsha, China.,Key Laboratory of Hunan Province in Neurodegenerative Disorders, Central South University, Changsha, China
| |
Collapse
|
146
|
Mihály J, Deák R, Szigyártó IC, Bóta A, Beke-Somfai T, Varga Z. Characterization of extracellular vesicles by IR spectroscopy: Fast and simple classification based on amide and CH stretching vibrations. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1859:459-466. [PMID: 27989744 DOI: 10.1016/j.bbamem.2016.12.005] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 11/29/2016] [Accepted: 12/14/2016] [Indexed: 12/21/2022]
Abstract
Extracellular vesicles isolated by differential centrifugation from Jurkat T-cell line were investigated by attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR). Amide and CH stretching band intensity ratios calculated from IR bands, characteristic of protein and lipid components, proved to be distinctive for the different extracellular vesicle subpopulations. This proposed 'spectroscopic protein-to-lipid ratio', combined with the outlined spectrum-analysis protocol is valid also for low sample concentrations (0.15-0.05mg/ml total protein content) and can carry information about the presence of other non-vesicular formations such as aggregated proteins, lipoproteins and immune complexes. Detailed analysis of IR data reveals compositional changes of extracellular vesicles subpopulations: second derivative spectra suggest changes in protein composition from parent cell towards exosomes favoring proteins with β-turns and unordered motifs at the expense of intermolecular β-sheet structures. The IR-based protein-to-lipid assessment protocol was tested also for red blood cell derived microvesicles for which similar values were obtained. The potential applicability of this technique for fast and efficient characterization of vesicular components is high as the investigated samples require no further preparations and all the different molecular species can be determined in the same sample. The results indicate that ATR-FTIR measurements provide a simple and reproducible method for the screening of extracellular vesicle preparations. It is hoped that this sophisticated technique will have further impact in extracellular vesicle research.
Collapse
Affiliation(s)
- Judith Mihály
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary.
| | - Róbert Deák
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Imola Csilla Szigyártó
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Attila Bóta
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Tamás Beke-Somfai
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Zoltán Varga
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| |
Collapse
|
147
|
Russell AE, Doll DN, Sarkar SN, Simpkins JW. TNF-α and Beyond: Rapid Mitochondrial Dysfunction Mediates TNF-α-Induced Neurotoxicity. ACTA ACUST UNITED AC 2016; 7. [PMID: 28652929 PMCID: PMC5482413 DOI: 10.4172/2155-9899.1000467] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This short communication describes our research which demonstrates that TNF-α causes a rapid decline in mitochondrial function, leading to neuronal cell death. As such, this neurotoxic proinflammatory cytokine may play a role in brain damage from stroke and neurodegeneration in chronic conditions such as Alzheimer's disease (AD) and Parkinson's disease. We have extended this initial observation by demonstrating that TNF-α stimulates a microRNA (miR-34a) which we have shown reduces five key proteins in the mitochondrial electron transport chain through base-pair complementarity. miR-34a is increased in affected brain regions of Alzheimer's patients and transgenic AD mouse models. We have further shown that oligomeric amyloid beta 42 (oAβ42) stimulates miR-34a. Collectively, these data suggest that TNF-α, oAβ42, and miR-34a participate in a vicious cycle, resulting in mitochondrial dysfunction, which is critical to the neuropathology of AD.
Collapse
Affiliation(s)
- Ashley E Russell
- Physiology & Pharmacology, Center for Basic and Translational Stroke Research, Blanchett Rockefeller Neuroscience Institute, West Virginia University, Morgantown, West Virginia, USA
| | - Danielle N Doll
- Physiology & Pharmacology, Center for Basic and Translational Stroke Research, Blanchett Rockefeller Neuroscience Institute, West Virginia University, Morgantown, West Virginia, USA
| | - Saumyendra N Sarkar
- Physiology & Pharmacology, Center for Basic and Translational Stroke Research, Blanchett Rockefeller Neuroscience Institute, West Virginia University, Morgantown, West Virginia, USA
| | - James W Simpkins
- Physiology & Pharmacology, Center for Basic and Translational Stroke Research, Blanchett Rockefeller Neuroscience Institute, West Virginia University, Morgantown, West Virginia, USA
| |
Collapse
|
148
|
Xing C, Lo EH. Help-me signaling: Non-cell autonomous mechanisms of neuroprotection and neurorecovery. Prog Neurobiol 2016; 152:181-199. [PMID: 27079786 DOI: 10.1016/j.pneurobio.2016.04.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Revised: 04/06/2016] [Accepted: 04/09/2016] [Indexed: 12/11/2022]
Abstract
Self-preservation is required for life. At the cellular level, this fundamental principle is expressed in the form of molecular mechanisms for preconditioning and tolerance. When the cell is threatened, internal cascades of survival signaling become triggered to protect against cell death and defend against future insults. Recently, however, emerging findings suggest that this principle of self-preservation may involve not only intracellular signals; the release of extracellular signals may provide a way to recruit adjacent cells into an amplified protective program. In the central nervous system where multiple cell types co-exist, this mechanism would allow threatened neurons to "ask for help" from glial and vascular compartments. In this review, we describe this new concept of help-me signaling, wherein damaged or diseased neurons release signals that may shift glial and vascular cells into potentially beneficial phenotypes, and help remodel the neurovascular unit. Understanding and dissecting these non-cell autonomous mechanisms of self-preservation in the CNS may lead to novel opportunities for neuroprotection and neurorecovery.
Collapse
Affiliation(s)
- Changhong Xing
- Departments of Radiology and Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.
| | - Eng H Lo
- Departments of Radiology and Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.
| |
Collapse
|
149
|
Cardoso A, Guedes J, Cardoso A, Morais C, Cunha P, Viegas A, Costa R, Jurado A, Pedroso de Lima M. Recent Trends in Nanotechnology Toward CNS Diseases. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2016; 130:1-40. [DOI: 10.1016/bs.irn.2016.05.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|