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Santoyo JM, Noguera JA, Avilés F, Hernández-Caselles T, de Paco-Matallana C, Delgado JL, Cuevas S, Llinás MT, Hernández I. Pravastatin reduces plasma levels of extracellular vesicles in pregnancies at high risk of term preeclampsia. Front Pharmacol 2023; 14:1166123. [PMID: 37426825 PMCID: PMC10323224 DOI: 10.3389/fphar.2023.1166123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 06/06/2023] [Indexed: 07/11/2023] Open
Abstract
Introduction: Elevated plasma levels of extracellular vesicles have been associated with impaired placentation, angiogenesis imbalance, intravascular inflammation, and endothelial dysfunction in women with preeclampsia, thus suggesting that circulating vesicles may be a good therapeutic target for the treatment of the disease. Recently, statins have been considered a potential treatment for the prevention of preeclampsia because of their pleiotropic effects, including the improvement of endothelial dysfunction and inhibition of inflammatory responses. However, the effects of these drugs on circulating vesicles concentration in women at risk of preeclampsia have not been established. Herein, we aimed to assess the effects of pravastatin on circulating extracellular vesicle generation in women at high risk of term preeclampsia. Methods: In a sample of 68 singleton pregnant women participating in the multicenter, double-blind, placebo-controlled STATIN trial (Nº EducraCT 2016-005206-19 ISRCTN), 35 women received a placebo and 33 women received a 20 mg/day dose of pravastatin for approximately 3 weeks (from 35 to 37 weeks of gestation until delivery). Large extracellular vesicles were characterized and quantified by flow cytometry using annexin V and cell-specific antibodies directed against platelet, endothelial, leukocyte, and syncytiotrophoblast cell surface markers. Results: In women who received the placebo, a significant increase in the plasma levels of large extracellular vesicles from platelets (34%, p < 0.01), leukocytes (33%, p < 0.01), monocytes (60%, p < 0.01), endothelial cells (40%, p < 0.05), and syncytiotrophoblast cells (22%, p < 0.05) were observed. However, treatment with pravastatin significantly reduced the plasma levels of large extracellular vesicles from platelets (42%, p < 0.001), leukocytes (25%, p < 0.001), monocytes (61%, p < 0.001), endothelial cells (69%, p < 0.001), activated endothelial cells (55%, p < 0.001), and syncytiotrophoblast cells (44%, p < 0.001). Discussion: These results indicate that pravastatin reduces the levels of activated cell-derived membrane vesicles from the maternal vasculature, blood, and placental syncytiotrophoblast of women at high risk of term preeclampsia, suggesting that this statin may be beneficial in reducing endothelial dysfunction and pro-inflammatory and pro-coagulatory state characteristics of the disease.
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Affiliation(s)
- Jean Michell Santoyo
- Department of Physiology, Institute of Biomedical Research (IMIB-Pascual Parrilla), University of Murcia, Murcia, Spain
| | - José Antonio Noguera
- Institute of Biomedical Research (IMIB-Pascual Parrilla), University Clinical Hospital Virgen de la Arrixaca, Murcia, Spain
| | - Francisco Avilés
- Institute of Biomedical Research (IMIB-Pascual Parrilla), University Clinical Hospital Virgen de la Arrixaca, Murcia, Spain
| | - Trinidad Hernández-Caselles
- Department of Biochemistry and Molecular Biology “B” and Immunology, Institute of Biomedical Research (IMIB-Pascual Parrilla), University of Murcia, Murcia, Spain
| | - Catalina de Paco-Matallana
- Institute of Biomedical Research (IMIB-Pascual Parrilla), University Clinical Hospital Virgen de la Arrixaca, Murcia, Spain
| | - Juan Luis Delgado
- Institute of Biomedical Research (IMIB-Pascual Parrilla), University Clinical Hospital Virgen de la Arrixaca, Murcia, Spain
| | - Santiago Cuevas
- Molecular Inflammation Group, Institute of Biomedical Research (IMIB-Pascual Parrilla), University Clinical Hospital Virgen de la Arrixaca, Murcia, Spain
| | - M. Teresa Llinás
- Department of Physiology, Institute of Biomedical Research (IMIB-Pascual Parrilla), University of Murcia, Murcia, Spain
| | - Isabel Hernández
- Department of Physiology, Institute of Biomedical Research (IMIB-Pascual Parrilla), University of Murcia, Murcia, Spain
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Liu Z, Zhang W, Zhang X, Wang S, Xia Z, Guo X, Zhao Y, Wang P, Wang XH. Microstructured Optical Fiber-Enhanced Light-Matter Interaction Enables Highly Sensitive Exosome-Based Liquid Biopsy of Breast Cancer. Anal Chem 2023; 95:1095-1105. [PMID: 36600563 DOI: 10.1021/acs.analchem.2c03794] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Exosome-based liquid biopsies highlight potential utility in diagnosis and determining the prognosis of patients with cancer and other diseases. However, the existing techniques are severely limited for practical applications due to the complications of high cost, low sensitivity, tedious procedures, and large sample consumption. Herein, we report a microstructured optical fiber sensor for fast, sensitive, and accurate quantification of exosomes in blood samples of breast cancer patients. Numerical simulations are applied to demonstrate that hollow-core microstructured antiresonant fibers (HARFs) can stringently confine light in the fiber core, ensuring strong light-matter interaction and thus maximumly amplifying the signal. Taking this advantage, a AuNPs-dsDNA assembly containing gold nanoparticles, a recognizing DNA aptamer, and a fluorescent reporter DNA sequence is fabricated followed by immobilization on the fiber wall to form a AuNPs-dsDNA-HARF sensor. Cancer-derived exosomes can be recognized and captured in the fiber channel and generate dose-dependent fluorescent signals for quantification. The microfiber sensor demonstrates enhanced sensitivity and specificity, enabling the detection of single digits of exosome particles at the nanoliter sample level. In addition, by tracking exosome phenotypic changes, the proposed fiber sensor can facilitate precise drug treatment monitoring. This work provides a robust platform for exosome-based biopsy for cancer diagnosis and prediction of therapeutic outcomes.
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Affiliation(s)
- Zihao Liu
- Laboratory for Biomedical Photonics, Beijing University of Technology, Beijing100124, China
| | - Wen Zhang
- Department of Immunology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing100021, China
| | - Xin Zhang
- Laboratory for Advanced Laser Technology and Applications, Beijing University of Technology, Beijing100124, China
| | - Shijia Wang
- Laboratory for Biomedical Photonics, Beijing University of Technology, Beijing100124, China
| | - Zhiwen Xia
- Laboratory for Biomedical Photonics, Beijing University of Technology, Beijing100124, China
| | - Xiaoyan Guo
- Laboratory for Biomedical Photonics, Beijing University of Technology, Beijing100124, China
| | - Yu Zhao
- Laboratory for Advanced Photonics, Institute of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing100124, China.,Key Laboratory of Trans-scale Laser Manufacturing Technology, Ministry of Education, Beijing100124, China.,Beijing Engineering Research Center of Laser Technology, Beijing100124, China
| | - Pu Wang
- Laboratory for Advanced Laser Technology and Applications, Beijing University of Technology, Beijing100124, China.,Key Laboratory of Trans-scale Laser Manufacturing Technology, Ministry of Education, Beijing100124, China.,Beijing Engineering Research Center of Laser Technology, Beijing100124, China
| | - Xiu-Hong Wang
- Laboratory for Biomedical Photonics, Beijing University of Technology, Beijing100124, China.,Key Laboratory of Trans-scale Laser Manufacturing Technology, Ministry of Education, Beijing100124, China.,Beijing Engineering Research Center of Laser Technology, Beijing100124, China
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3
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Lang JB, Buck MC, Rivière J, Stambouli O, Sachenbacher K, Choudhary P, Dietz H, Giebel B, Bassermann F, Oostendorp RAJ, Götze KS, Hecker JS. Comparative analysis of extracellular vesicle isolation methods from human AML bone marrow cells and AML cell lines. Front Oncol 2022; 12:949261. [PMID: 36263223 PMCID: PMC9574064 DOI: 10.3389/fonc.2022.949261] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 09/12/2022] [Indexed: 11/13/2022] Open
Abstract
Cellular crosstalk between hematopoietic stem/progenitor cells and the bone marrow (BM) niche is vital for the development and maintenance of myeloid malignancies. These compartments can communicate via bidirectional transfer of extracellular vesicles (EVs). EV trafficking in acute myeloid leukemia (AML) plays a crucial role in shaping the BM microenvironment into a leukemia-permissive niche. Although several EV isolation methods have been developed, it remains a major challenge to define the most accurate and reliable procedure. Here, we tested the efficacy and functional assay compatibility of four different EV isolation methods in leukemia-derived EVs: (1) membrane affinity-based: exoEasy Kit alone and (2) in combination with Amicon filtration; (3) precipitation: ExoQuick-TC; and (4) ultracentrifugation (UC). Western blot analysis of EV fractions showed the highest enrichment of EV marker expression (e.g., CD63, HSP70, and TSG101) by precipitation with removal of overabundant soluble proteins [e.g., bovine serum albumin (BSA)], which were not discarded using UC. Besides the presence of damaged EVs after UC, intact EVs were successfully isolated with all methods as evidenced by highly maintained spherical- and cup-shaped vesicles in transmission electron microscopy. Nanoparticle tracking analysis of EV particle size and concentration revealed significant differences in EV isolation efficacy, with exoEasy Kit providing the highest EV yield recovery. Of note, functional assays with exoEasy Kit-isolated EVs showed significant toxicity towards treated target cells [e.g., mesenchymal stromal cells (MSCs)], which was abrogated when combining exoEasy Kit with Amicon filtration. Additionally, MSC treated with green fluorescent protein (GFP)-tagged exoEasy Kit-isolated EVs did not show any EV uptake, while EV isolation by precipitation demonstrated efficient EV internalization. Taken together, the choice of EV isolation procedure significantly impacts the yield and potential functionality of leukemia-derived EVs. The cheapest method (UC) resulted in contaminated and destructed EV fractions, while the isolation method with the highest EV yield (exoEasy Kit) appeared to be incompatible with functional assays. We identified two methods (precipitation-based ExoQuick-TC and membrane affinity-based exoEasy Kit combined with Amicon filtration) yielding pure and intact EVs, also suitable for application in functional assays. This study highlights the importance of selecting the right EV isolation method depending on the desired experimental design.
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Affiliation(s)
- Jonas B. Lang
- Department of Medicine III, Technical University of Munich (TUM), Klinikum rechts der Isar, Munich, Germany
| | - Michèle C. Buck
- Department of Medicine III, Technical University of Munich (TUM), Klinikum rechts der Isar, Munich, Germany
| | - Jennifer Rivière
- Department of Medicine III, Technical University of Munich (TUM), Klinikum rechts der Isar, Munich, Germany
| | - Oumaima Stambouli
- Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany
| | - Ken Sachenbacher
- Department of Physics, Technical University of Munich (TUM), Munich, Germany
- Munich Institute of Biomedical Engineering, Technical University of Munich (TUM), Munich, Germany
| | - Purva Choudhary
- Department of Medicine III, Technical University of Munich (TUM), Klinikum rechts der Isar, Munich, Germany
| | - Hendrik Dietz
- Department of Physics, Technical University of Munich (TUM), Munich, Germany
- Munich Institute of Biomedical Engineering, Technical University of Munich (TUM), Munich, Germany
| | - Bernd Giebel
- Institute for Transfusion Medicine, University Hospital Essen, Essen, Germany
| | - Florian Bassermann
- Department of Medicine III, Technical University of Munich (TUM), Klinikum rechts der Isar, Munich, Germany
- TranslaTUM, Center for Translational Cancer Research, Technical University of Munich (TUM), Munich, Germany
| | - Robert A. J. Oostendorp
- Department of Medicine III, Technical University of Munich (TUM), Klinikum rechts der Isar, Munich, Germany
| | - Katharina S. Götze
- Department of Medicine III, Technical University of Munich (TUM), Klinikum rechts der Isar, Munich, Germany
| | - Judith S. Hecker
- Department of Medicine III, Technical University of Munich (TUM), Klinikum rechts der Isar, Munich, Germany
- *Correspondence: Judith S. Hecker,
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Mazzucco M, Mannheim W, Shetty SV, Linden JR. CNS endothelial derived extracellular vesicles are biomarkers of active disease in multiple sclerosis. Fluids Barriers CNS 2022; 19:13. [PMID: 35135557 PMCID: PMC8822708 DOI: 10.1186/s12987-021-00299-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 12/20/2021] [Indexed: 12/13/2022] Open
Abstract
Background Multiple sclerosis (MS) is a complex, heterogenous disease characterized by inflammation, demyelination, and blood–brain barrier (BBB) permeability. Currently, active disease is determined by physician confirmed relapse or detection of contrast enhancing lesions via MRI indicative of BBB permeability. However, clinical confirmation of active disease can be cumbersome. As such, disease monitoring in MS could benefit from identification of an easily accessible biomarker of active disease. We believe extracellular vesicles (EV) isolated from plasma are excellent candidates to fulfill this need. Because of the critical role BBB permeability plays in MS pathogenesis and identification of active disease, we sought to identify EV originating from central nervous system (CNS) endothelial as biomarkers of active MS. Because endothelial cells secrete more EV when stimulated or injured, we hypothesized that circulating concentrations of CNS endothelial derived EV will be increased in MS patients with active disease. Methods To test this, we developed a novel method to identify EV originating from CNS endothelial cells isolated from patient plasma using flow cytometry. Endothelial derived EV were identified by the absence of lymphocyte or platelet markers CD3 and CD41, respectively, and positive expression of pan-endothelial markers CD31, CD105, or CD144. To determine if endothelial derived EV originated from CNS endothelial cells, EV expressing CD31, CD105, or CD144 were evaluated for expression of the myelin and lymphocyte protein MAL, a protein specifically expressed by CNS endothelial cells compared to endothelial cells of peripheral organs. Results Quality control experiments indicate that EV detected using our flow cytometry method are 0.2 to 1 micron in size. Flow cytometry analysis of EV isolated from 20 healthy controls, 16 relapsing–remitting MS (RRMS) patients with active disease not receiving disease modifying therapy, 14 RRMS patients with stable disease not receiving disease modifying therapy, 17 relapsing-RRMS patients with stable disease receiving natalizumab, and 14 RRMS patients with stable disease receiving ocrelizumab revealed a significant increase in the plasma concentration of CNS endothelial derived EV in patients with active disease compared to all other groups (p = 0.001). Conclusions: For the first time, we have identified a method to identify CNS endothelial derived EV in circulation from human blood samples. Results from our pilot study indicate that increased levels of CNS endothelial derived EV may be a biomarker of BBB permeability and active disease in MS. Supplementary Information The online version contains supplementary material available at 10.1186/s12987-021-00299-4.
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Affiliation(s)
- Michael Mazzucco
- The Brain and Mind Research Institute and the Department of Neurology, Weill Cornell Medical College, 1300 York Ave, New York, NY, 10065, USA
| | - William Mannheim
- Department of Neurology, Weill Cornell Medical College, New York, NY, USA
| | - Samantha V Shetty
- The Brain and Mind Research Institute and the Department of Neurology, Weill Cornell Medical College, 1300 York Ave, New York, NY, 10065, USA
| | - Jennifer R Linden
- The Brain and Mind Research Institute and the Department of Neurology, Weill Cornell Medical College, 1300 York Ave, New York, NY, 10065, USA.
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5
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Delgado-Peraza F, Nogueras-Ortiz CJ, Volpert O, Liu D, Goetzl EJ, Mattson MP, Greig NH, Eitan E, Kapogiannis D. Neuronal and Astrocytic Extracellular Vesicle Biomarkers in Blood Reflect Brain Pathology in Mouse Models of Alzheimer's Disease. Cells 2021; 10:cells10050993. [PMID: 33922642 PMCID: PMC8146429 DOI: 10.3390/cells10050993] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/13/2021] [Accepted: 04/15/2021] [Indexed: 12/22/2022] Open
Abstract
Circulating neuronal extracellular vesicles (NEVs) of Alzheimer’s disease (AD) patients show high Tau and β-amyloid (Aβ) levels, whereas their astrocytic EVs (AEVs) contain high complement levels. To validate EV proteins as AD biomarkers, we immunocaptured NEVs and AEVs from plasma collected from fifteen wild type (WT), four 2xTg-AD, nine 5xFAD, and fifteen 3xTg-AD mice and assessed biomarker relationships with brain tissue levels. NEVs from 3xTg-AD mice had higher total Tau (p = 0.03) and p181-Tau (p = 0.0004) compared to WT mice. There were moderately strong correlations between biomarkers in NEVs and cerebral cortex and hippocampus (total Tau: cortex, r = 0.4, p = 0.009; p181-Tau: cortex, r = 0.7, p < 0.0001; hippocampus, r = 0.6, p < 0.0001). NEVs from 5xFAD compared to other mice had higher Aβ42 (p < 0.005). NEV Aβ42 had moderately strong correlations with Aβ42 in cortex (r = 0.6, p = 0.001) and hippocampus (r = 0.7, p < 0.0001). AEV C1q was elevated in 3xTg-AD compared to WT mice (p = 0.005); AEV C1q had moderate-strong correlations with C1q in cortex (r = 0.9, p < 0.0001) and hippocampus (r = 0.7, p < 0.0001). Biomarkers in circulating NEVs and AEVs reflect their brain levels across multiple AD mouse models supporting their potential use as a “liquid biopsy” for neurological disorders.
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Affiliation(s)
- Francheska Delgado-Peraza
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, MD 212241, USA; (F.D.-P.); (C.J.N.-O.)
| | - Carlos J. Nogueras-Ortiz
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, MD 212241, USA; (F.D.-P.); (C.J.N.-O.)
| | - Olga Volpert
- NeuroDex Inc., Natick, MA 01760, USA; (O.V.); (E.E.)
| | - Dong Liu
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA; (D.L.); (N.H.G.)
| | - Edward J. Goetzl
- Department of Medicine, University of California, San Francisco, CA 94143, USA;
- San Francisco Campus for Jewish Living, San Francisco, CA 94112, USA
| | - Mark P. Mattson
- Department of Neuroscience, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA;
| | - Nigel H. Greig
- Translational Gerontology Branch, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA; (D.L.); (N.H.G.)
| | - Erez Eitan
- NeuroDex Inc., Natick, MA 01760, USA; (O.V.); (E.E.)
| | - Dimitrios Kapogiannis
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute on Aging, National Institutes of Health, Baltimore, MD 212241, USA; (F.D.-P.); (C.J.N.-O.)
- Correspondence: ; Tel.: +1-410-454-8393
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6
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Zoom in on Antibody Aggregates: A Potential Pitfall in the Search of Rare EV Populations. Biomedicines 2021; 9:biomedicines9020206. [PMID: 33670624 PMCID: PMC7923005 DOI: 10.3390/biomedicines9020206] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/29/2021] [Accepted: 02/08/2021] [Indexed: 11/16/2022] Open
Abstract
High-resolution flow cytometers (hFCM) are used for the detection of extracellular vesicles (EV) in various biological fluids. Due to the increased sensitivity of hFCM, new artifacts with the potential of interfering with data interpretation are introduced, such as detection of antibody aggregates. The aim of this study was to investigate the extent of aggregates in labels commonly used for the characterization of EVs by hFCM. Furthermore, we aimed to compare the efficacy of centrifugation and filtering treatments to remove aggregates, as well as to quantify the effect of the treatments in reducing aggregates. For this purpose, we labeled phosphate buffered saline (PBS) with fluorescently conjugated protein labels and antibodies after submitting them to 5, 10, or 30 min centrifugation, filtering or washed filtering. We investigated samples by hFCM and quantified the amount of aggregates found in PBS labeled with untreated and pre-treated labels. We found a varying amount of aggregates in all labels investigated, and further that filtering is most efficient in removing all but the smallest aggregates. Filtering protein labels can reduce the extent of aggregates; however, how much remains depends on the specific labels and their combination. Therefore, it is still necessary to include appropriate controls in a hFCM study of EVs.
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Marques de Menezes EG, Jang K, George AF, Nyegaard M, Neidleman J, Inglis HC, Danesh A, Deng X, Afshari A, Kim YH, Billaud JN, Marson K, Pilcher CD, Pillai SK, Norris PJ, Roan NR. Seminal Plasma-Derived Extracellular-Vesicle Fractions from HIV-Infected Men Exhibit Unique MicroRNA Signatures and Induce a Proinflammatory Response in Cells Isolated from the Female Reproductive Tract. J Virol 2020; 94:e00525-20. [PMID: 32434889 PMCID: PMC7394899 DOI: 10.1128/jvi.00525-20] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 05/15/2020] [Indexed: 11/20/2022] Open
Abstract
The continuing spread of HIV/AIDS is predominantly fueled by sexual exposure to HIV-contaminated semen. Seminal plasma (SP), the liquid portion of semen, harbors a variety of factors that may favor HIV transmission by facilitating viral entry into host cells, eliciting the production of proinflammatory cytokines, and enhancing the translocation of HIV across the genital epithelium. One important and abundant class of factors in SP is extracellular vesicles (EVs), which, in general, are important intercellular signal transducers. Although numerous studies have characterized blood plasma-derived EVs from both uninfected and HIV-infected individuals, little is known about the properties of EVs from the semen of HIV-infected individuals. We report here that fractionated SP enriched for EVs from HIV-infected men induces potent transcriptional responses in epithelial and stromal cells that interface with the luminal contents of the female reproductive tract. Semen EV fractions from acutely infected individuals induced a more proinflammatory signature than those from uninfected individuals. This was not associated with any observable differences in the surface phenotypes of the vesicles. However, microRNA (miRNA) expression profiling analysis revealed that EV fractions from infected individuals exhibit a broader and more diverse profile than those from uninfected individuals. Taken together, our data suggest that SP EVs from HIV-infected individuals exhibit unique miRNA signatures and exert potent proinflammatory transcriptional changes in cells of the female reproductive tract, which may facilitate HIV transmission.IMPORTANCE Seminal plasma (SP), the major vehicle for HIV, can modulate HIV transmission risk through a variety of mechanisms. Extracellular vesicles (EVs) are extremely abundant in semen, and because they play a key role in intercellular communication pathways and immune regulation, they may impact the likelihood of HIV transmission. However, little is known about the properties and signaling effects of SP-derived EVs in the context of HIV transmission. Here, we conduct a phenotypic, transcriptomic, and functional characterization of SP and SP-derived EVs from uninfected and HIV-infected men. We find that both SP and its associated EVs elicit potent proinflammatory transcriptional responses in cells that line the genital tract. EVs from HIV-infected men exhibit a more diverse repertoire of miRNAs than EVs from uninfected men. Our findings suggest that EVs from the semen of HIV-infected men may significantly impact the likelihood of HIV transmission through multiple mechanisms.
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Affiliation(s)
- Erika G Marques de Menezes
- Vitalant Research Institute, San Francisco, California, USA
- Department of Laboratory Medicine, University of California, San Francisco, California, USA
| | - Karen Jang
- Gladstone Institute of Virology and Immunology, San Francisco, California, USA
- Department of Urology, University of California, San Francisco, California, USA
| | - Ashley F George
- Gladstone Institute of Virology and Immunology, San Francisco, California, USA
- Department of Urology, University of California, San Francisco, California, USA
| | - Mette Nyegaard
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Jason Neidleman
- Gladstone Institute of Virology and Immunology, San Francisco, California, USA
- Department of Urology, University of California, San Francisco, California, USA
| | | | - Ali Danesh
- Vitalant Research Institute, San Francisco, California, USA
| | - Xutao Deng
- Vitalant Research Institute, San Francisco, California, USA
| | | | - Young H Kim
- Agilent Technologies, Inc., Santa Clara, California, USA
| | | | - Kara Marson
- Division of HIV, Infectious Diseases and Global Medicine, Department of Medicine, University of California, San Francisco, California, USA
| | - Christopher D Pilcher
- Division of HIV, Infectious Diseases and Global Medicine, Department of Medicine, University of California, San Francisco, California, USA
| | - Satish K Pillai
- Vitalant Research Institute, San Francisco, California, USA
- Department of Laboratory Medicine, University of California, San Francisco, California, USA
| | - Philip J Norris
- Vitalant Research Institute, San Francisco, California, USA
- Department of Laboratory Medicine, University of California, San Francisco, California, USA
- Department of Medicine, University of California, San Francisco, California, USA
| | - Nadia R Roan
- Gladstone Institute of Virology and Immunology, San Francisco, California, USA
- Department of Urology, University of California, San Francisco, California, USA
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8
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Dekel E, Abou Karam P, Ohana-Daniel Y, Biton M, Regev-Rudzki N, Porat Z. Antibody-Free Labeling of Malaria-Derived Extracellular Vesicles Using Flow Cytometry. Biomedicines 2020; 8:E98. [PMID: 32349226 PMCID: PMC7277110 DOI: 10.3390/biomedicines8050098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 04/19/2020] [Accepted: 04/21/2020] [Indexed: 12/24/2022] Open
Abstract
Extracellular vesicles (EVs) are cell-derived membrane-bound structures that are believed to play a major role in intercellular communication by allowing cells to exchange proteins and genetic cargo between them. In particular, pathogens, such as the malaria parasite Plasmodium (P.) falciparum, utilize EVs to promote their growth and to alter their host's response. Thus, better characterization of these secreted organelles will enhance our understanding of the cellular processes that govern EVs' biology and pathological functions. Here we present a method that utilizes a high-end flow cytometer system to characterize small EVs, i.e., with a diameter less than 200 nm. Using this method, we could evaluate different parasite-derived EV populations according to their distinct cargo by using antibody-free labeling. It further allows to closely monitor a sub-population of vesicles carrying parasitic DNA cargo. This ability paves the way to conducting a more 'educated' analysis of the various EV cargo components.
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Affiliation(s)
- Elya Dekel
- Faculty of Biochemistry, Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel; (E.D.); (P.A.K.); (Y.O.-D.); (M.B.)
| | - Paula Abou Karam
- Faculty of Biochemistry, Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel; (E.D.); (P.A.K.); (Y.O.-D.); (M.B.)
| | - Yael Ohana-Daniel
- Faculty of Biochemistry, Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel; (E.D.); (P.A.K.); (Y.O.-D.); (M.B.)
| | - Mirit Biton
- Faculty of Biochemistry, Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel; (E.D.); (P.A.K.); (Y.O.-D.); (M.B.)
| | - Neta Regev-Rudzki
- Faculty of Biochemistry, Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel; (E.D.); (P.A.K.); (Y.O.-D.); (M.B.)
| | - Ziv Porat
- Flow Cytometry Unit, Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot 7610001, Israel
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9
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Blood manufacturing methods affect red blood cell product characteristics and immunomodulatory activity. Blood Adv 2019; 2:2296-2306. [PMID: 30217795 DOI: 10.1182/bloodadvances.2018021931] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 07/26/2018] [Indexed: 12/14/2022] Open
Abstract
Transfusion of red cell concentrates (RCCs) is associated with increased risk of adverse outcomes that may be affected by different blood manufacturing methods and the presence of extracellular vesicles (EVs). We investigated the effect of different manufacturing methods on hemolysis, residual cells, cell-derived EVs, and immunomodulatory effects on monocyte activity. Thirty-two RCC units produced using whole blood filtration (WBF), red cell filtration (RCF), apheresis-derived (AD), and whole blood-derived (WBD) methods were examined (n = 8 per method). Residual platelet and white blood cells (WBCs) and the concentration, cell of origin, and characterization of EVs in RCC supernatants were assessed in fresh and stored supernatants. Immunomodulatory activity of RCC supernatants was assessed by quantifying monocyte cytokine production capacity in an in vitro transfusion model. RCF units yielded the lowest number of platelet and WBC-derived EVs, whereas the highest number of platelet EVs was in AD (day 5) and in WBD (day 42). The number of small EVs (<200 nm) was greater than large EVs (≥200 nm) in all tested supernatants, and the highest level of small EVs were in AD units. Immunomodulatory activity was mixed, with evidence of both inflammatory and immunosuppressive effects. Monocytes produced more inflammatory interleukin-8 after exposure to fresh WBF or expired WBD supernatants. Exposure to supernatants from AD and WBD RCC suppressed monocyte lipopolysaccharide-induced cytokine production. Manufacturing methods significantly affect RCC unit EV characteristics and are associated with an immunomodulatory effect of RCC supernatants, which may affect the quality and safety of RCCs.
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10
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Miyazawa B, Trivedi A, Togarrati PP, Potter D, Baimukanova G, Vivona L, Lin M, Lopez E, Callcut R, Srivastava AK, Kornblith LZ, Fields AT, Schreiber MA, Wade CE, Holcomb JB, Pati S. Regulation of endothelial cell permeability by platelet-derived extracellular vesicles. J Trauma Acute Care Surg 2019; 86:931-942. [PMID: 31124890 PMCID: PMC7381393 DOI: 10.1097/ta.0000000000002230] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND Platelet (Plt)-derived extracellular vesicles (Plt-EVs) have hemostatic properties similar to Plts. In addition to hemostasis, Plts also function to stabilize the vasculature and maintain endothelial cell (EC) barrier integrity. We hypothesized that Plt-EVs would inhibit vascular EC permeability, similar to fresh Plts. To investigate this hypothesis, we used in vitro and in vivo models of vascular endothelial compromise and bleeding. METHODS In the vitro model, Plt-EVs were isolated by ultracentrifugation and characterized for Plt markers and particle size distribution. Effects of Plts and Plt-EVs on endothelial barrier function were assessed by transendothelial electrical resistance measurements and histological analysis of endothelial junction proteins. Hemostatic potential of Plt-EVs and Plts was assessed by multiple electrode Plt aggregometry. Using an in vivo model, the effects of Plts and Plt-EVs on vascular permeability and bleeding were assessed in non-obese diabetic-severe combined immunodeficient (NOD-SCID) mice by an established Miles assay of vascular permeability and a tail snip bleeding assay. RESULTS In the in vitro model, Plt-EVs displayed exosomal size distribution and expressed Plt-specific surface markers. Platelets and Plt-EVs decreased EC permeability and restored EC junctions after thrombin challenge. Multiplate aggregometry revealed that Plt-EVs enhanced thrombin receptor-activating peptide-mediated aggregation of whole blood, whereas Plts enhanced thrombin receptor-activating peptide-, arachidonic acid-, collagen-, and adenosine diphosphate-mediated aggregation. In the in vivo model, Plt-EVs are equivalent to Plts in attenuating vascular endothelial growth factor (VEGF)-A-induced vascular permeability and uncontrolled blood loss in a tail snip hemorrhage model. CONCLUSION Our study is the first to report that Plt-EVs might provide a feasible product for transfusion in trauma patients to attenuate bleeding, inhibit vascular permeability, and mitigate the endotheliopathy of trauma.
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Affiliation(s)
- Byron Miyazawa
- From the Department of Laboratory Medicine (B.M., A.T., D.P., L.V., M.L., S.P.), University of California; Blood Systems Research Institute (P.P.T., G.B.), San Francisco, California; Department of Surgery (EL., C.E.W.), University of Texas Health Science Center at Houston; Department of Pediatric Surgery (A.K.S., J.B.H.), McGovern Medical School, University of Texas Health Science Center at Houston, Houston, Texas; Department of Surgery (R.C., L.Z.K., A.T.F.), University of California San Francisco, San Francisco, California; Department of Surgery (M.A.S.), Oregon Health Science and University, Portland, Oregon
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11
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Silverman JM, Christy D, Shyu CC, Moon KM, Fernando S, Gidden Z, Cowan CM, Ban Y, Stacey RG, Grad LI, McAlary L, Mackenzie IR, Foster LJ, Cashman NR. CNS-derived extracellular vesicles from superoxide dismutase 1 (SOD1) G93A ALS mice originate from astrocytes and neurons and carry misfolded SOD1. J Biol Chem 2019; 294:3744-3759. [PMID: 30635404 DOI: 10.1074/jbc.ra118.004825] [Citation(s) in RCA: 103] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 01/02/2019] [Indexed: 01/09/2023] Open
Abstract
Extracellular vesicles (EVs) are secreted by myriad cells in culture and also by unicellular organisms, and their identification in mammalian fluids suggests that EV release also occurs at the organism level. However, although it is clearly important to better understand EVs' roles in organismal biology, EVs in solid tissues have received little attention. Here, we modified a protocol for EV isolation from primary neural cell culture to collect EVs from frozen whole murine and human neural tissues by serial centrifugation and purification on a sucrose gradient. Quantitative proteomics comparing brain-derived EVs from nontransgenic (NTg) and a transgenic amyotrophic lateral sclerosis (ALS) mouse model, superoxide dismutase 1 (SOD1)G93A, revealed that these EVs contain canonical exosomal markers and are enriched in synaptic and RNA-binding proteins. The compiled brain EV proteome contained numerous proteins implicated in ALS, and EVs from SOD1G93A mice were significantly depleted in myelin-oligodendrocyte glycoprotein compared with those from NTg animals. We observed that brain- and spinal cord-derived EVs, from NTg and SOD1G93A mice, are positive for the astrocyte marker GLAST and the synaptic marker SNAP25, whereas CD11b, a microglial marker, was largely absent. EVs from brains and spinal cords of the SOD1G93A ALS mouse model, as well as from human SOD1 familial ALS patient spinal cord, contained abundant misfolded and nonnative disulfide-cross-linked aggregated SOD1. Our results indicate that CNS-derived EVs from an ALS animal model contain pathogenic disease-causing proteins and suggest that brain astrocytes and neurons, but not microglia, are the main EV source.
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Affiliation(s)
- Judith M Silverman
- From the Centre for Brain Health, Department of Medicine, University of British Columbia, Vancouver, British Columbia V6T 1B5, Canada
| | - Darren Christy
- From the Centre for Brain Health, Department of Medicine, University of British Columbia, Vancouver, British Columbia V6T 1B5, Canada
| | - Chih Cheih Shyu
- From the Centre for Brain Health, Department of Medicine, University of British Columbia, Vancouver, British Columbia V6T 1B5, Canada
| | - Kyung-Mee Moon
- the Centre for High-throughput Biology, University of British Columbia, Vancouver, British Columbia V6T 1B5, Canada
| | - Sarah Fernando
- From the Centre for Brain Health, Department of Medicine, University of British Columbia, Vancouver, British Columbia V6T 1B5, Canada
| | - Zoe Gidden
- From the Centre for Brain Health, Department of Medicine, University of British Columbia, Vancouver, British Columbia V6T 1B5, Canada
| | - Catherine M Cowan
- From the Centre for Brain Health, Department of Medicine, University of British Columbia, Vancouver, British Columbia V6T 1B5, Canada
| | - Yuxin Ban
- From the Centre for Brain Health, Department of Medicine, University of British Columbia, Vancouver, British Columbia V6T 1B5, Canada
| | - R Greg Stacey
- the Centre for High-throughput Biology, University of British Columbia, Vancouver, British Columbia V6T 1B5, Canada
| | - Leslie I Grad
- From the Centre for Brain Health, Department of Medicine, University of British Columbia, Vancouver, British Columbia V6T 1B5, Canada
| | - Luke McAlary
- From the Centre for Brain Health, Department of Medicine, University of British Columbia, Vancouver, British Columbia V6T 1B5, Canada.,the Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada, and
| | - Ian R Mackenzie
- the Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V6T 1B5, Canada
| | - Leonard J Foster
- the Centre for High-throughput Biology, University of British Columbia, Vancouver, British Columbia V6T 1B5, Canada
| | - Neil R Cashman
- From the Centre for Brain Health, Department of Medicine, University of British Columbia, Vancouver, British Columbia V6T 1B5, Canada,
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12
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Kwizera EA, O'Connor R, Vinduska V, Williams M, Butch ER, Snyder SE, Chen X, Huang X. Molecular Detection and Analysis of Exosomes Using Surface-Enhanced Raman Scattering Gold Nanorods and a Miniaturized Device. Theranostics 2018; 8:2722-2738. [PMID: 29774071 PMCID: PMC5957005 DOI: 10.7150/thno.21358] [Citation(s) in RCA: 145] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 01/09/2018] [Indexed: 12/24/2022] Open
Abstract
Exosomes are a potential source of cancer biomarkers. Probing tumor-derived exosomes can offer a potential non-invasive way to diagnose cancer, assess cancer progression, and monitor treatment responses. Novel molecular methods would facilitate exosome analysis and accelerate basic and clinical exosome research. Methods: A standard gold-coated glass microscopy slide was used to develop a miniaturized affinity-based device to capture exosomes in a target-specific manner with the assistance of low-cost 3-D printing technology. Gold nanorods coated with QSY21 Raman reporters were used as the label agent to quantitatively detect the target proteins based on surface enhanced Raman scattering spectroscopy. The expressions of several surface protein markers on exosomes from conditioned culture media of breast cancer cells and from HER2-positive breast cancer patients were quantitatively measured. The data was statistically analyzed and compared with healthy controls. Results: A miniaturized 17 × 5 Au array device with 2-mm well size was fabricated to capture exosomes in a target-specific manner and detect the target proteins on exosomes with surface enhanced Raman scattering gold nanorods. This assay can specifically detect exosomes with a limit of detection of 2×106 exosomes/mL and analyze over 80 purified samples on a single device within 2 h. Using the assay, we have showed that exosomes derived from MDA-MB-231, MDA-MB-468, and SKBR3 breast cancer cells give distinct protein profiles compared to exosomes derived from MCF12A normal breast cells. We have also showed that exosomes in the plasma from HER2-positive breast cancer patients exhibit significantly (P ≤ 0.01) higher level of HER2 and EpCAM than those from healthy donors. Conclusion: We have developed a simple, inexpensive, highly efficient, and portable Raman exosome assay for detection and protein profiling of exosomes. Using the assay and model exosomes from breast cancer cells, we have showed that exosomes exhibit diagnostic surface protein markers, reflecting the protein profile of their donor cells. Through proof-of-concept studies, we have identified HER2 and EpCAM biomarkers on exosomes in plasma from HER2-positive breast cancer patients, suggesting the diagnostic potential of these markers for breast cancer diagnostics. This assay would accelerate exosome research and pave a way to the development of novel cancer liquid biopsy for cancer detection and monitoring.
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Affiliation(s)
| | - Ryan O'Connor
- Department of Chemistry, The University of Memphis, Memphis, TN 38152
| | - Vojtech Vinduska
- Department of Chemistry, The University of Memphis, Memphis, TN 38152
| | - Melody Williams
- Department of Chemistry, The University of Memphis, Memphis, TN 38152
| | - Elizabeth R. Butch
- Diagnostics Imaging Department, St Jude Children's Research Hospital, Memphis, TN 38105
| | - Scott E. Snyder
- Diagnostics Imaging Department, St Jude Children's Research Hospital, Memphis, TN 38105
| | - Xiang Chen
- Department of Computational Biology, St Jude Children's Research Hospital, Memphis, TN 38105
| | - Xiaohua Huang
- Department of Chemistry, The University of Memphis, Memphis, TN 38152
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13
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Alkhatatbeh MJ, Enjeti AK, Baqar S, Ekinci EI, Liu D, Thorne RF, Lincz LF. Strategies for enumeration of circulating microvesicles on a conventional flow cytometer: Counting beads and scatter parameters. J Circ Biomark 2018; 7:1849454418766966. [PMID: 29662552 PMCID: PMC5894907 DOI: 10.1177/1849454418766966] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 02/21/2018] [Indexed: 01/05/2023] Open
Abstract
Enumeration of circulating microvesicles (MVs) by conventional flow cytometry is accomplished by the addition of a known amount of counting beads and calculated from the formula: MV/μl = (MV count/bead count) × final bead concentration. We sought to optimize each variable in the equation by determining the best parameters for detecting ‘MV count’ and examining the effects of different bead preparations and concentrations on the final calculation. Three commercially available bead preparations (TruCount, Flow-Count and CountBright) were tested, and MV detection on a BD FACSCanto was optimized for gating by either forward scatter (FSC) or side scatter (SSC); the results were compared by calculating different subsets of MV on a series of 74 typical patient plasma samples. The relationship between the number of beads added to each test and the number of beads counted by flow cytometry remained linear over a wide range of bead concentrations (R2 ≥ 0.997). However, TruCount beads produced the most consistent (concentration variation = 3.8%) calculated numbers of plasma CD41+/Annexin V+ MV, which were significantly higher from that calculated using either Flow-Count or CountBright (p < 0.001). The FACSCanto was able to resolve 0.5 μm beads by FSC and 0.16 μm beads by SSC, but there were significantly more background events using SSC compared with FSC (3113 vs. 470; p = 0.008). In general, sample analysis by SSC resulted in significantly higher numbers of MV (p < 0.0001) but was well correlated with enumeration by FSC for all MV subtypes (ρ = 0.62–0.89, p < 0.0001). We conclude that all counting beads provided linear results at concentrations ranging from 6 beads/μl to 100 beads/μl, but TruCount was the most consistent. Using SSC to gate MV events produced high background which negatively affected counting bead enumeration and overall MV calculations. Strategies to reduce SSC background should be employed in order to reliably use this technique.
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Affiliation(s)
- Mohammad J Alkhatatbeh
- Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, Jordan
| | - Anoop K Enjeti
- Haematology Unit, Calvary Mater Newcastle, New South Wales, Australia.,Hunter Medical Research Institute, New Lambton, New South Wales, Australia.,Faculty of Health and Medicine, University of Newcastle, New South Wales, Australia.,Pathology North Hunter, NSW Health Pathology, New South Wales, Australia
| | - Sara Baqar
- Department of Endocrinology, Austin Health, Victoria, Australia.,Department of Medicine, Austin Health, The University of Melbourne, Victoria, Australia
| | - Elif I Ekinci
- Department of Endocrinology, Austin Health, Victoria, Australia.,Department of Medicine, Austin Health, The University of Melbourne, Victoria, Australia
| | - Dorothy Liu
- Department of Endocrinology, Austin Health, Victoria, Australia.,Department of Medicine, Austin Health, The University of Melbourne, Victoria, Australia
| | - Rick F Thorne
- Department of Endocrinology, Austin Health, Victoria, Australia.,Department of Medicine, Austin Health, The University of Melbourne, Victoria, Australia
| | - Lisa F Lincz
- Haematology Unit, Calvary Mater Newcastle, New South Wales, Australia.,Hunter Medical Research Institute, New Lambton, New South Wales, Australia.,Faculty of Health and Medicine, University of Newcastle, New South Wales, Australia
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14
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Millar D, Murphy L, Labrie A, Maurer-Spurej E. Routine Screening Method for Microparticles in Platelet Transfusions. J Vis Exp 2018. [PMID: 29443045 PMCID: PMC5912315 DOI: 10.3791/56893] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Platelet inventory management based on screening microparticle content in platelet concentrates is a new quality improvement initiative for hospital blood banks. Cells fragment off microparticles (MP) when they are stressed. Blood and blood components may contain cellular fragments from a variety of cells, most notably from activated platelets. When performing their roles as innate immune cells and major players in coagulation and hemostasis, platelets change shape and generate microparticles. With dynamic light scattering (DLS)-based microparticle detection, it is possible to differentiate activated (high microparticle) from non-activated (low microparticle) platelets in transfusions, and optimize the use of this scarce blood product. Previous research suggests that providing non-activated platelets for prophylactic use in hematology-oncology patients could reduce their risk of becoming refractory and improve patient care. The goal of this screening method is to routinely differentiate activated from non-activated platelets. The method described here outlines the steps to be performed for routine platelet inventory management in a hospital blood bank: obtaining a sample from a platelet transfusion, loading the sample into the capillary for DLS measurement, performing the DLS test to identify microparticles, and using the reported microparticle content to identify activated platelets.
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Affiliation(s)
| | - Larry Murphy
- Quality Engineering & Regulatory, LightIntegra Technology Inc
| | | | - Elisabeth Maurer-Spurej
- Research & Development, LightIntegra Technology Inc.; Department of Pathology and Laboratory Medicine; Center for Blood Research, University of British Columbia; Canadian Blood Services;
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15
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Van Hoecke L, Job ER, Saelens X, Roose K. Bronchoalveolar Lavage of Murine Lungs to Analyze Inflammatory Cell Infiltration. J Vis Exp 2017:55398. [PMID: 28518083 PMCID: PMC5607888 DOI: 10.3791/55398] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Bronchoalveolar Lavage (BAL) is an experimental procedure that is used to examine the cellular and acellular content of the lung lumen ex vivo to gain insight into an ongoing disease state. Here, a simple and efficient method is described to perform BAL on murine lungs without the need of special tools or equipment. BAL fluid is isolated by inserting a catheter in the trachea of terminally anesthetized mice, through which a saline solution is instilled into the bronchioles. The instilled fluid is gently retracted to maximize BAL fluid retrieval and to minimize shearing forces. This technique allows the viability, function, and structure of cells within the airways and BAL fluid to be preserved. Numerous techniques may be applied to gain further understanding of the disease state of the lung. Here, a commonly used technique for the identification and enumeration of different types of immune cells is described, where flow cytometry is combined with a select panel of fluorescently labeled cell surface-specific markers. The BAL procedure presented here can also be used to analyze infectious agents, fluid constituents, or inhaled particles within murine lungs.
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Affiliation(s)
- Lien Van Hoecke
- UGent Center for Medical Biotechnology, VIB; Department of Biomedical Molecular Biology, Ghent University (UGent);
| | - Emma Richelle Job
- UGent Center for Medical Biotechnology, VIB; Department of Biomedical Molecular Biology, Ghent University (UGent)
| | - Xavier Saelens
- UGent Center for Medical Biotechnology, VIB; Department of Biomedical Molecular Biology, Ghent University (UGent)
| | - Kenny Roose
- UGent Center for Medical Biotechnology, VIB; Department of Biomedical Molecular Biology, Ghent University (UGent)
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16
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Huang X, O'Connor R, Kwizera EA. Gold Nanoparticle Based Platforms for Circulating Cancer Marker Detection. Nanotheranostics 2017; 1:80-102. [PMID: 28217434 PMCID: PMC5313055 DOI: 10.7150/ntno.18216] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Detection of cancer-related circulating biomarkers in body fluids has become a cutting-edge technology that has the potential to noninvasively screen cancer, diagnose cancer at early stage, monitor tumor progression, and evaluate therapy responses. Traditional molecular and cellular detection methods are either insensitive for early cancer intervention or technically costly and complicated making them impractical for typical clinical settings. Due to their exceptional structural and functional properties that are not available from bulk materials or discrete molecules, nanotechnology is opening new horizons for low cost, rapid, highly sensitive, and highly specific detection of circulating cancer markers. Gold nanoparticles have emerged as a unique nanoplatform for circulating biomarker detection owning to their advantages of easy synthesis, facile surface chemistry, excellent biocompatibility, and remarkable structure and environment sensitive optical properties. In this review, we introduce current gold nanoparticle-based technology platforms for the detection of four major classes of circulating cancer markers - circulating tumor cells, vesicles, nucleic acids, and proteins. The techniques will be summarized in terms of signal detection strategies. Distinctive examples are provided to highlight the state-of-the-art technologies that significantly advance basic and clinical cancer research.
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Affiliation(s)
- Xiaohua Huang
- Department of Chemistry, The University of Memphis, Memphis, TN 38152
| | - Ryan O'Connor
- Department of Chemistry, The University of Memphis, Memphis, TN 38152
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17
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Exosomes as new diagnostic tools in CNS diseases. Biochim Biophys Acta Mol Basis Dis 2016; 1862:403-10. [DOI: 10.1016/j.bbadis.2015.09.020] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 09/16/2015] [Accepted: 09/25/2015] [Indexed: 12/27/2022]
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18
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Bakkour S, Acker JP, Chafets DM, Inglis HC, Norris PJ, Lee TH, Busch MP. Manufacturing method affects mitochondrial DNA release and extracellular vesicle composition in stored red blood cells. Vox Sang 2016; 111:22-32. [PMID: 26918437 DOI: 10.1111/vox.12390] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 01/15/2016] [Accepted: 01/19/2016] [Indexed: 12/23/2022]
Abstract
BACKGROUND AND OBJECTIVES Damage-associated molecular patterns (DAMPs) are found in transfusion products, but their potential impacts are not fully understood. We examined the influence of manufacturing method on levels of mitochondrial (mt) DNA and extracellular vesicle (EV) DAMPs in red cell concentrates (RCCs). MATERIALS AND METHODS Eighty-seven RCCs were prepared using nine different methods (6-15 units/method), including three apheresis, five whole blood (WB)-derived leucoreduced (LR) and one WB-derived non-LR method. On storage days 5 and 42, levels of mtDNA (by PCR) and number and cell of origin of EVs (by flow cytometry) were assessed in RCC supernatants. RESULTS There was a 100-fold difference in mtDNA levels among methods, with highest levels in non-LR, followed by MCS+ and Trima apheresis RCCs. There was a 10-fold difference in EV levels among methods. RBC-derived CD235a+ EVs were found in fresh RCCs and increased in most during storage. Platelet-derived CD41a+ EVs were highest in non-LR and Trima RCCs and did not change during storage. WBC-derived EVs were low in most RCCs; CD14+ EVs increased in several RCCs during storage. CONCLUSION DAMPs in RCCs vary by manufacturing method. MtDNA and EV could be informative quality markers that may be relevant to RCC immunomodulatory potential.
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Affiliation(s)
- S Bakkour
- Blood Systems Research Institute, San Francisco, CA, USA
| | - J P Acker
- Canadian Blood Services Centre for Innovation, Edmonton, AB, Canada.,Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - D M Chafets
- Blood Systems Research Institute, San Francisco, CA, USA
| | - H C Inglis
- Blood Systems Research Institute, San Francisco, CA, USA
| | - P J Norris
- Blood Systems Research Institute, San Francisco, CA, USA.,Department of Laboratory Medicine, University of California, San Francisco, CA, USA.,Department of Medicine, University of California, San Francisco, CA, USA
| | - T-H Lee
- Blood Systems Research Institute, San Francisco, CA, USA
| | - M P Busch
- Blood Systems Research Institute, San Francisco, CA, USA.,Department of Laboratory Medicine, University of California, San Francisco, CA, USA
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