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Cerebrospinal Fluid and Plasma Small Extracellular Vesicles and miRNAs as Biomarkers for Prion Diseases. Int J Mol Sci 2021; 22:ijms22136822. [PMID: 34201940 PMCID: PMC8268953 DOI: 10.3390/ijms22136822] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/04/2021] [Accepted: 06/21/2021] [Indexed: 11/27/2022] Open
Abstract
Diagnosis of transmissible spongiform encephalopathies (TSEs), or prion diseases, is based on the detection of proteinase K (PK)-resistant PrPSc in post-mortem tissues as indication of infection and disease. Since PrPSc detection is not considered a reliable method for in vivo diagnosis in most TSEs, it is of crucial importance to identify an alternative source of biomarkers to provide useful alternatives for current diagnostic methodology. Ovine scrapie is the prototype of TSEs and has been known for a long time. Using this natural model of TSE, we investigated the presence of PrPSc in exosomes derived from plasma and cerebrospinal fluid (CSF) by protein misfolding cyclic amplification (PMCA) and the levels of candidate microRNAs (miRNAs) by quantitative PCR (qPCR). Significant scrapie-associated increase was found for miR-21-5p in plasma-derived but not in CSF-derived exosomes. However, miR-342-3p, miR-146a-5p, miR-128-3p and miR-21-5p displayed higher levels in total CSF from scrapie-infected sheep. The analysis of overexpressed miRNAs in this biofluid, together with plasma exosomal miR-21-5p, could help in scrapie diagnosis once the presence of the disease is suspected. In addition, we found the presence of PrPSc in most CSF-derived exosomes from clinically affected sheep, which may facilitate in vivo diagnosis of prion diseases, at least during the clinical stage.
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An attempt to dissect a peripheral marker based on cell pathology in Parkinson's disease. J Neural Transm (Vienna) 2021; 128:1599-1610. [PMID: 34109443 PMCID: PMC8528800 DOI: 10.1007/s00702-021-02364-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 06/02/2021] [Indexed: 02/06/2023]
Abstract
Peripheral markers in Parkinson's disease (PD) represent a hot issue to provide early diagnosis and assess disease progression. The gold standard marker of PD should feature the same reliability as the pathogenic alteration, which produces the disease itself. PD is foremost a movement disorder produced by a loss of nigrostriatal dopamine innervation, in which striatal dopamine terminals are always markedly reduced in PD patients to an extent, which never overlaps with controls. Similarly, a reliable marker of PD should possess such a non-overlapping feature when compared with controls. In the present study, we provide a novel pathological hallmark, the autophagosome, which in each PD patient was always suppressed compared with each control subject. Autophagosomes were counted as microtubule-associated proteins 1A/1B light chain 3B (LC3)-positive vacuoles at ultrastructural morphometry within peripheral (blood) blood mononuclear cells (PBMC). This also provides the gold standard to assess the autophagy status. Since autophagy may play a role in the pathogenesis of PD, autophagosomes may be a disease marker, while participating in the biology of the disease. Stoichiometric measurement of α-synuclein despite significantly increased in PD patients, overlapped between PD and control patients. Although the study need to be validated in large populations, the number of autophagy vacuoles is neither related with therapy (the amount was similarly suppressed in a few de novo patients), nor the age in PD or controls.
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Exosomes as Emerging Biomarker Tools in Neurodegenerative and Neuropsychiatric Disorders-A Proteomics Perspective. Brain Sci 2021; 11:brainsci11020258. [PMID: 33669482 PMCID: PMC7922222 DOI: 10.3390/brainsci11020258] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/11/2021] [Accepted: 02/12/2021] [Indexed: 01/05/2023] Open
Abstract
Exosomes are synthesized and secreted by different cell types and contain proteins, lipids, metabolites and RNA species that reflect the physiological status of the cell of origin. As such, exosomes are increasingly being used as a novel reservoir for disease biomarker discovery. However, isolation of exosomes can be challenging due to their nonuniformity of shape and variable tissue of origin. Moreover, various analytical techniques used for protein detection and quantitation remain insensitive to the low amounts of protein isolated from exosomes. Despite these challenges, techniques to improve proteomic yield and increase protein dynamic range continue to improve at a rapid rate. In this review, we highlight the importance of exosome proteomics in neurodegenerative and neuropsychiatric disorders and the associated technical difficulties. Furthermore, current progress and technological advancements in exosome proteomics research are discussed with an emphasis on disease-associated protein biomarkers.
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Pinnell JR, Cui M, Tieu K. Exosomes in Parkinson disease. J Neurochem 2021; 157:413-428. [PMID: 33372290 DOI: 10.1111/jnc.15288] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 12/17/2020] [Accepted: 12/23/2020] [Indexed: 12/18/2022]
Abstract
Parkinson disease (PD) is a prevalent neurodegenerative disease, in which the formation of misfolded and aggregated α-synuclein is a key neuropathological hallmark. Recent studies reveal that extracellular vesicles such as exosomes present a potential mechanism for propagation of pathological α-synuclein throughout the brain. The ability of exosomes to transport proteins and genetic material between cells, including mRNA and microRNAs which have been implicated in PD pathology, provides critical insights as to how exosomes may contribute to pathological progression in PD. Advances have also been made in the investigation of exosomes as potential tools for the modulation of Parkinson's pathology; their detection extracellularly may facilitate their use as biomarkers, while their small size could be utilised as vectors for the delivery of therapeutics. The aim of this review was to highlight our current knowledge of the role of exosomes in PD and potential clinical application.
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Affiliation(s)
- Jennifer R Pinnell
- Department of Environmental Health Sciences, Florida International University, Miami, FL, USA.,Peninsula Schools of Medicine and Dentistry, Plymouth University, Plymouth, UK
| | - Mei Cui
- Department of Neurology, Huashan hospital, Fudan University, Shanghai, China
| | - Kim Tieu
- Department of Environmental Health Sciences, Florida International University, Miami, FL, USA.,Biomolecular Sciences Institute, Florida International University, Miami, FL, USA
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Emerging Role of Extracellular Vesicles in Embryo-Maternal Communication throughout Implantation Processes. Int J Mol Sci 2020; 21:ijms21155523. [PMID: 32752293 PMCID: PMC7432060 DOI: 10.3390/ijms21155523] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 07/23/2020] [Accepted: 07/30/2020] [Indexed: 02/07/2023] Open
Abstract
In ruminants, the establishment of proper conceptus–endometrial communication is essential for conceptus implantation and subsequent successful placentation. Accumulated evidence supports the idea that extracellular vesicles (EVs) present in uterine lumen are involved in conceptus–endometrial interactions during the preimplantation period. EVs make up a new field of intercellular communicators, which transport a variety of bioactive molecules, including soluble and membrane-bound proteins, lipids, DNA, and RNAs. EVs thus regulate gene expression and elicit biological effects including increased cell proliferation, migration, and adhesion in recipient cells. Uterine EVs are interactive and coordinate with ovarian progesterone (P4), trophectoderm-derived interferon tau (IFNT) and/or prostaglandins (PGs) in the physiological or pathological microenvironment. In this review, we will focus on intrauterine EVs in embryo–maternal interactions during the early stage of pregnancy, especially the implantation period in ruminant ungulates.
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Leng B, Sun H, Zhao J, Liu Y, Shen T, Liu W, Liu X, Tan M, Li F, Zhang J, Li Z. Plasma exosomal prion protein levels are correlated with cognitive decline in PD patients. Neurosci Lett 2020; 723:134866. [PMID: 32109555 DOI: 10.1016/j.neulet.2020.134866] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Revised: 02/17/2020] [Accepted: 02/24/2020] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Cognitive decline is a common non-motor symptom of Parkinson disease (PD), and cellular prion protein (PrPC) has been suggested to play a role in this process. This study aimed to investigate the correlation between plasma exosomal prion protein and cognitive decline in PD patients. METHOD A total of 60 participants, which included 23 PD patients without cognitive impairment (the PD-NCI group), 17 PD patients with cognitive impairment (the PD-CI group) and 20 health controls were included in this study. All participants received a complete evaluation of motor symptoms as well as non-motor symptoms, which include devaluations of cognitive function(assessed with the Montreal Cognitive Assessment (MoCA)) and their psychiatric state(assessed with the Hamilton Anxiety Scale(HAM-A) and Hamilton Depression Scale(HAMD-17)). We used an enzyme-linked immunosorbent assay (ELISA) to measure the plasma exosomal prion protein level. The exosomal marker Heat shock protein 70 (HSP 70) was used to normalize the protein level to the exosome content. RESULT In PD patients, the plasma exosomal prion protein concentration was negatively correlated with the cognitive level. The plasma exosomal prion protein concentration was significantly higher in the PD-CI group than in the control group (p < 0.05) and the PD-NCI group (p < 0.05).Multivariate regression analysis indicated that plasma exosomal prion protein levels were significantly associated with the cognitive level (t=-3.185, P = 0.001) after adjusting for age, education, disease duration, H&Y stage and MDS-UPDRS-III scores. CONCLUSION The plasma exosomal prion protein level is correlated with cognitive decline in PD patients and might be a potential biomarker for PD patients at risk for cognitive impairment.
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Affiliation(s)
- Bing Leng
- Weifang Medical University, PR China; Department of Neurology, Weihai Municipal Hospital, Weihai Clinical School of Shandong University, PR China
| | - Hairong Sun
- Department of Neurology, Weihai Municipal Hospital, Weihai Clinical School of Shandong University, PR China
| | - Junwu Zhao
- Department of Neurology, Weihai Municipal Hospital, Weihai Clinical School of Shandong University, PR China
| | - Yuanyuan Liu
- Department of Neurology, Weihai Municipal Hospital, Weihai Clinical School of Shandong University, PR China
| | - Tengqun Shen
- Department of Neurology, Weihai Municipal Hospital, Weihai Clinical School of Shandong University, PR China
| | - Wenjin Liu
- Department of Neurology, Weihai Municipal Hospital, the Affiliated Hostpital of Binzhou Medical University, PR China
| | - Xiaoxiao Liu
- Department of Neurology, Weihai Municipal Hospital, Weihai Clinical School of Shandong University, PR China
| | - Ming Tan
- Department of Neurology, Weihai Municipal Hospital, Weihai Clinical School of Shandong University, PR China
| | - Fang Li
- Department of Neurology, the First Affiliated Hospital of Jinzhou Medical University, PR China
| | - Jinbiao Zhang
- Weifang Medical University, PR China; Department of Neurology, Weihai Municipal Hospital, Weihai Clinical School of Shandong University, PR China
| | - Zhenguang Li
- Weifang Medical University, PR China; Department of Neurology, Weihai Municipal Hospital, Weihai Clinical School of Shandong University, PR China.
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Wang X, Botchway BOA, Zhang Y, Yuan J, Liu X. Combinational Treatment of Bioscaffolds and Extracellular Vesicles in Spinal Cord Injury. Front Mol Neurosci 2019; 12:81. [PMID: 31031590 PMCID: PMC6474389 DOI: 10.3389/fnmol.2019.00081] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 03/14/2019] [Indexed: 12/11/2022] Open
Abstract
Spinal cord injury (SCI) can result in an irreversible disability due to loss of sensorimotor function below the lesion. Presently, clinical treatments for SCI mainly include surgery, drugs and postoperative rehabilitation. The prospective roles of bioscaffolds and exosomes in several neurological diseases have been reported. Bioscaffolds can reconnect lesion gaps as well as transport cells and bioactive factors, which in turn can improve axonal and functional regeneration. Herein, we explicate the respective roles of bioscaffolds and exosomes in SCI, and elucidate on the usage of combinational therapy involving bioscaffolds and extracellular vesicles (EVs) in improving SCI.
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Affiliation(s)
- Xizhi Wang
- Department of Histology and Embryology, Medical College, Shaoxing University, Zhejiang, China
| | - Benson O A Botchway
- Institute of Neuroscience, Zhejiang University School of Medicine, Hangzhou, China
| | - Yong Zhang
- Department of Histology and Embryology, Medical College, Shaoxing University, Zhejiang, China
| | - Jiaying Yuan
- Department of Histology and Embryology, Medical College, Shaoxing University, Zhejiang, China
| | - Xuehong Liu
- Department of Histology and Embryology, Medical College, Shaoxing University, Zhejiang, China
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Vilette D, Courte J, Peyrin JM, Coudert L, Schaeffer L, Andréoletti O, Leblanc P. Cellular mechanisms responsible for cell-to-cell spreading of prions. Cell Mol Life Sci 2018; 75:2557-2574. [PMID: 29761205 PMCID: PMC11105574 DOI: 10.1007/s00018-018-2823-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 04/04/2018] [Accepted: 04/23/2018] [Indexed: 01/01/2023]
Abstract
Prions are infectious agents that cause fatal neurodegenerative diseases. Current evidence indicates that they are essentially composed of an abnormally folded protein (PrPSc). These abnormal aggregated PrPSc species multiply in infected cells by recruiting and converting the host PrPC protein into new PrPSc. How prions move from cell to cell and progressively spread across the infected tissue is of crucial importance and may provide experimental opportunity to delay the progression of the disease. In infected cells, different mechanisms have been identified, including release of infectious extracellular vesicles and intercellular transfer of PrPSc-containing organelles through tunneling nanotubes. These findings should allow manipulation of the intracellular trafficking events targeting PrPSc in these particular subcellular compartments to experimentally address the relative contribution of these mechanisms to in vivo prion pathogenesis. In addition, such information may prompt further experimental strategies to decipher the causal roles of protein misfolding and aggregation in other human neurodegenerative diseases.
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Affiliation(s)
- Didier Vilette
- UMR1225, INRA, ENVT, Ecole Nationale Vétérinaire, 23 Chemin des Capelles, Toulouse, France.
| | - Josquin Courte
- Neurosciences Paris Seine, UMR8246, Inserm U1130, IBPS, UPMC, Sorbonne Universités, 4 Place Jussieu, 75005, Paris, France
- Laboratoire Physico Chimie Curie, UMR168, UPMC, IPGG, Sorbonne Universités, 6 Rue Jean Calvin, 75005, Paris, France
| | - Jean Michel Peyrin
- Neurosciences Paris Seine, UMR8246, Inserm U1130, IBPS, UPMC, Sorbonne Universités, 4 Place Jussieu, 75005, Paris, France.
| | - Laurent Coudert
- Insitut NeuroMyoGène, CNRS UMR5310, INSERM U1217, Faculté de Médecine Rockefeller, Université Claude Bernard Lyon I, 8 Avenue Rockefeller, 69373, Lyon Cedex 08, France
| | - Laurent Schaeffer
- Insitut NeuroMyoGène, CNRS UMR5310, INSERM U1217, Faculté de Médecine Rockefeller, Université Claude Bernard Lyon I, 8 Avenue Rockefeller, 69373, Lyon Cedex 08, France
| | - Olivier Andréoletti
- UMR1225, INRA, ENVT, Ecole Nationale Vétérinaire, 23 Chemin des Capelles, Toulouse, France
| | - Pascal Leblanc
- Insitut NeuroMyoGène, CNRS UMR5310, INSERM U1217, Faculté de Médecine Rockefeller, Université Claude Bernard Lyon I, 8 Avenue Rockefeller, 69373, Lyon Cedex 08, France.
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Cheng L, Zhao W, Hill AF. Exosomes and their role in the intercellular trafficking of normal and disease associated prion proteins. Mol Aspects Med 2017; 60:62-68. [PMID: 29196098 DOI: 10.1016/j.mam.2017.11.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 11/08/2017] [Accepted: 11/27/2017] [Indexed: 12/13/2022]
Abstract
Over the past decade, small extracellular vesicles called exosomes have been observed to harbour protein and genetic cargo that can assist in health and also cause disease. Many groups are extensively investigating the mechanisms involved that regulate the trafficking and packaging of exosomal contents and how these processes may be deregulated in disease. Prion diseases are transmissible neurodegenerative disorders and are characterized by the presence of detectable misfolded prion proteins. The disease associated form of the prion protein can be found in exosomes and its transmissible properties have provided a reliable experimental read out that can be used to understand how exosomes and their cargo are involved in cell-cell communication and in the spread of prion diseases. This review reports on the current understanding of how exosomes are involved in the intercellular spread of infectious prions. Furthermore, we discuss how these principles are leading future investigations in developing new exosome based diagnostic tools and therapeutic drugs that could be applied to other neurodegenerative diseases.
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Affiliation(s)
- Lesley Cheng
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, Australia
| | - Wenting Zhao
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, Australia
| | - Andrew F Hill
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, Australia.
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Hartmann A, Muth C, Dabrowski O, Krasemann S, Glatzel M. Exosomes and the Prion Protein: More than One Truth. Front Neurosci 2017; 11:194. [PMID: 28469550 PMCID: PMC5395619 DOI: 10.3389/fnins.2017.00194] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 03/22/2017] [Indexed: 01/01/2023] Open
Abstract
Exosomes are involved in the progression of neurodegenerative diseases. The cellular prion protein (PrPC) is highly expressed on exosomes. In neurodegenerative diseases, PrPC has at least two functions: It is the substrate for the generation of pathological prion protein (PrPSc), a key player in the pathophysiology of prion diseases. On the other hand, it binds neurotoxic amyloid-beta (Aß) oligomers, which are associated with initiation and progression of Alzheimer's disease (AD). This has direct consequences for the role of exosomal expressed PrPC. In prion diseases, exosomal PrP leads to efficient dissemination of pathological prion protein, thus promoting spreading and transmission of the disease. In AD, exosomal PrPC can bind and detoxify Aß oligomers thus acting protective. In both scenarios, assessment of the state of PrPC on exosomes derived from blood or cerebrospinal fluid (CSF) may be useful for diagnostic workup of these diseases. This review sums up current knowledge of the role of exosomal PrPC on different aspects of Alzheimer's and prion disease.
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Affiliation(s)
- Alexander Hartmann
- Center of Diagnostics, Institute of Neuropathology, University Medical Center Hamburg-EppendorfHamburg, Germany
| | - Christiane Muth
- Center of Diagnostics, Institute of Neuropathology, University Medical Center Hamburg-EppendorfHamburg, Germany
| | | | - Susanne Krasemann
- Center of Diagnostics, Institute of Neuropathology, University Medical Center Hamburg-EppendorfHamburg, Germany
| | - Markus Glatzel
- Center of Diagnostics, Institute of Neuropathology, University Medical Center Hamburg-EppendorfHamburg, Germany
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Linden R. The Biological Function of the Prion Protein: A Cell Surface Scaffold of Signaling Modules. Front Mol Neurosci 2017; 10:77. [PMID: 28373833 PMCID: PMC5357658 DOI: 10.3389/fnmol.2017.00077] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Accepted: 03/06/2017] [Indexed: 12/18/2022] Open
Abstract
The prion glycoprotein (PrPC) is mostly located at the cell surface, tethered to the plasma membrane through a glycosyl-phosphatydil inositol (GPI) anchor. Misfolding of PrPC is associated with the transmissible spongiform encephalopathies (TSEs), whereas its normal conformer serves as a receptor for oligomers of the β-amyloid peptide, which play a major role in the pathogenesis of Alzheimer’s Disease (AD). PrPC is highly expressed in both the nervous and immune systems, as well as in other organs, but its functions are controversial. Extensive experimental work disclosed multiple physiological roles of PrPC at the molecular, cellular and systemic levels, affecting the homeostasis of copper, neuroprotection, stem cell renewal and memory mechanisms, among others. Often each such process has been heralded as the bona fide function of PrPC, despite restricted attention paid to a selected phenotypic trait, associated with either modulation of gene expression or to the engagement of PrPC with a single ligand. In contrast, the GPI-anchored prion protein was shown to bind several extracellular and transmembrane ligands, which are required to endow that protein with the ability to play various roles in transmembrane signal transduction. In addition, differing sets of those ligands are available in cell type- and context-dependent scenarios. To account for such properties, we proposed that PrPC serves as a dynamic platform for the assembly of signaling modules at the cell surface, with widespread consequences for both physiology and behavior. The current review advances the hypothesis that the biological function of the prion protein is that of a cell surface scaffold protein, based on the striking similarities of its functional properties with those of scaffold proteins involved in the organization of intracellular signal transduction pathways. Those properties are: the ability to recruit spatially restricted sets of binding molecules involved in specific signaling; mediation of the crosstalk of signaling pathways; reciprocal allosteric regulation with binding partners; compartmentalized responses; dependence of signaling properties upon posttranslational modification; and stoichiometric requirements and/or oligomerization-dependent impact on signaling. The scaffold concept may contribute to novel approaches to the development of effective treatments to hitherto incurable neurodegenerative diseases, through informed modulation of prion protein-ligand interactions.
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Affiliation(s)
- Rafael Linden
- Laboratory of Neurogenesis, Institute of Biophysics, Federal University of Rio de Janeiro Rio de Janeiro, Brazil
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Cervenakova L, Saá P, Yakovleva O, Vasilyeva I, de Castro J, Brown P, Dodd R. Are prions transported by plasma exosomes? Transfus Apher Sci 2016; 55:70-83. [PMID: 27499183 DOI: 10.1016/j.transci.2016.07.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Blood has been shown to contain disease-associated misfolded prion protein (PrP(TSE)) in animals naturally and experimentally infected with various transmissible spongiform encephalopathy (TSE) agents, and in humans infected with variant Creutzfeldt-Jakob disease (vCJD). Recently, we have demonstrated PrP(TSE) in extracellular vesicle preparations (EVs) containing exosomes from plasma of mice infected with mouse-adapted vCJD by Protein Misfolding Cyclic Amplification (PMCA). Here we report the detection of PrP(TSE) by PMCA in EVs from plasma of mice infected with Fukuoka-1 (FU), an isolate from a Gerstmann-Sträussler-Scheinker disease patient. We used Tga20 transgenic mice that over-express mouse cellular prion protein, to assay by intracranial injections the level of infectivity in a FU-infected brain homogenate from wild-type mice (FU-BH), and in blood cellular components (BCC), consisting of red blood cells, white blood cells and platelets, plasma EVs, and plasma EVs subjected to multiple rounds of PMCA. Only FU-BH and plasma EVs from FU-infected mice subjected to PMCA that contained PrP(TSE) transmitted disease to Tga20 mice. Plasma EVs not subjected to PMCA and BCC from FU-infected mice failed to transmit disease. These findings confirm the high sensitivity of PMCA for PrP(TSE) detection in plasma EVs and the efficiency of this in vitro method to produce highly infectious prions. The results of our study encourage further research to define the role of EVs and, more specifically exosomes, as blood-borne carriers of PrP(TSE).
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Affiliation(s)
- Larisa Cervenakova
- Scientific Affairs, American National Red Cross, Rockville, Maryland, USA.
| | - Paula Saá
- Scientific Affairs, American National Red Cross, Rockville, Maryland, USA
| | - Oksana Yakovleva
- Scientific Affairs, American National Red Cross, Rockville, Maryland, USA; The Laboratory of Bacterial and Transmissible Spongiform Encephalopathy Agents, DETTD, OBRR, CBER, US Food and Drug Administration (FDA), Silver Spring, Maryland, USA
| | - Irina Vasilyeva
- Scientific Affairs, American National Red Cross, Rockville, Maryland, USA
| | - Jorge de Castro
- Scientific Affairs, American National Red Cross, Rockville, Maryland, USA; Meso Scale Diagnostics, LLC, Rockville, Maryland, USA
| | - Paul Brown
- National Institutes of Health, Bethesda, Maryland, USA
| | - Roger Dodd
- Scientific Affairs, American National Red Cross, Rockville, Maryland, USA
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Induction of IFNT-Stimulated Genes by Conceptus-Derived Exosomes during the Attachment Period. PLoS One 2016; 11:e0158278. [PMID: 27351483 PMCID: PMC4924817 DOI: 10.1371/journal.pone.0158278] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 06/13/2016] [Indexed: 12/18/2022] Open
Abstract
Biochemical and/or physical communication between the conceptus and the uterine endometrium is required for conceptus implantation to the maternal endometrium, leading to placentation and the establishment of pregnancy. We previously reported that in vitro co-culture system with bovine trophoblast CT-1 cells, primary uterine endometrial epithelial cells (EECs), and uterine flushings (UFs) mimics in vivo conceptus attachment process. To identify molecules in UFs responsible for this change, we first characterized protein contents of UFs from day 17 cyclic (C17) and pregnant (P17) ewes through the use of two dimensional-Polyacrylamide Gel Electrophoresis (2D-PAGE), followed by Liquid Chromatography-tandem Mass Spectrometry (LC-MS/MS) analysis. These analyses identified 266 proteins specific for P17 UFs, from which 172 proteins were identified as exosomal proteins. Among 172 exosomal proteins, 8 proteins that had been identified as exosomal proteins were chosen for further analysis, including macrophage-capping protein (CAPG), aldo-keto reductase family 1, member B1 protein (AKR1B1), bcl-2-like protein 15 (BCL2L15), carbonic anhydrase 2 (CA2), isocitrate dehydrogenase 2 (IDH2), eukaryotic translation elongation factor 2 (EEF2), moesin (MSN), and ezrin (EZR). CAPG and AKR1B1 were again confirmed in P15 and P17 UFs, and more importantly CAPG and AKR1B1, mRNA and protein, were found only in P15 and P17 conceptuses. Moreover, exosomes were isolated from C15, C17, P15, or P17 UFs. Only P15 and P17 exosomes, originated from the conceptus, contained interferon tau (IFNT) as well as CAPG and AKR1B1, and up-regulated STAT1, STAT2, MX1, MX2, BST2, and ISG15 transcripts in EECs. These observations indicate that in addition to endometrial derived exosomes previously described, conceptus-derived exosomes are present in UFs and could function to modify endometrial response. These results suggest that exosomes secreted from conceptuses as well as endometria are involved in cell to cell interactions for conceptus implantation to the maternal endometrium.
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