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Schapkaitz E, Libhaber E, Jacobson BF, Toman M, Gerber A, Büller HR. Evaluation of markers of fibrinolysis and coagulation in pregnant women with human immunodeficiency virus. Thromb Res 2022; 217:1-8. [PMID: 35810616 DOI: 10.1016/j.thromres.2022.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 05/31/2022] [Accepted: 07/04/2022] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Human immunodeficiency virus (HIV) in pregnant women is characterized by immune activation and inflammation despite suppressive antiretroviral therapy (ART). The extent to which ongoing inflammation contributes to activation of coagulation and fibrinolysis is unknown. MATERIALS AND METHODS This cross-sectional study included pregnant women in the following three groups: HIV negative (n = 109), HIV infected virologically suppressed (n = 109) and HIV infected with HIV viral load (VL) of >50 copies/mL (n = 80). Fibrinolytic activity was evaluated by measuring d-dimer and plasminogen activator inhibitor-1 (PAI-1) as well as thrombin-antithrombin (TAT) complex concentrations, as an index of coagulation, in the first, second and third trimesters. RESULTS In this population, with a mean age of 33 ± 6 years, pregnancy outcomes were recorded for 277 (93.0 %) participants with live births. HIV infected participants with virological suppression and VL of >50 copies/mL showed significantly increasing levels of d-dimer and PAI-1 in the first, second and third trimesters, as compared to HIV negative participants. No significant differences were observed between HIV infected participants with virological suppression and HIV infected participants with VL > 50 copies/mL for levels of first and third trimester d-dimer and PAI-1 in each trimester. In addition, TAT complex levels in the first trimester were significantly increased in HIV infected virologically suppressed participants as compared to HIV negative participants. CONCLUSION HIV infected virologically suppressed pregnant women show evidence of persistently impaired markers of fibrinolysis. Future research should explore the risk of adverse pregnancy complications among HIV infected pregnant women in the modern era of ART.
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Affiliation(s)
- Elise Schapkaitz
- Dept. of Molecular Medicine and Hematology, Charlotte Maxeke Johannesburg Academic Hospital National Health Laboratory System Complex and University of the Witwatersrand, South Africa.
| | - Elena Libhaber
- Dept. of Research Methodology and Statistics, Faculty of Health Sciences, University of the Witwatersrand Medical School, South Africa
| | - Barry F Jacobson
- Dept. of Molecular Medicine and Hematology, Charlotte Maxeke Johannesburg Academic Hospital National Health Laboratory System Complex and University of the Witwatersrand, South Africa
| | - Marketa Toman
- Department of Chemical Pathology, National Health Laboratory Service (NHLS) at the Faculty of Health Sciences, University of the Witwatersrand Medical School, South Africa
| | - Annika Gerber
- Department of Obstetrics, Charlotte Maxeke Johannesburg Academic Hospital, South Africa
| | - Harry R Büller
- Dept. of Vascular Medicine, Academic Medical Centre, University of Amsterdam, the Netherlands
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2
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Nair S, Ormazabal V, Lappas M, McIntyre HD, Salomon C. Extracellular vesicles and their potential role inducing changes in maternal insulin sensitivity during gestational diabetes mellitus. Am J Reprod Immunol 2021; 85:e13361. [PMID: 33064367 DOI: 10.1111/aji.13361] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 09/11/2020] [Accepted: 09/30/2020] [Indexed: 12/18/2022] Open
Abstract
Gestational diabetes mellitus (GDM) is one of the most common endocrine disorders during gestation and affects around 15% of all pregnancies worldwide, paralleling the global increase in obesity and type 2 diabetes. Normal pregnancies are critically dependent on the development of maternal insulin resistance balanced by an increased capacity to secrete insulin, which allows for the allocation of nutrients for adequate foetal growth and development. Several factors including placental hormones, inflammatory mediators and nutrients have been proposed to alter insulin sensitivity and insulin response and underpin the pathological outcomes of GDM. However, other factors may also be involved in the regulation of maternal metabolism and a complete understanding of GDM pathophysiology requires the identification of these factors, and the mechanisms associated with them. Recent studies highlight the potential utility of tissue-specific extracellular vesicles (EVs) in the diagnosis of disease onset and treatment monitoring for several pregnancy-related complications, including GDM. To date, there is a paucity of data defining changes in the release, content, bioactivity and diagnostic utility of circulating EVs in pregnancies complicated by GDM. Placental EVs may engage in paracellular interactions including local cell-to-cell communication between the cell constituents of the placenta and contiguous maternal tissues, and/or distal interactions involving the release of placental EVs into biological fluids and their transport to a remote site of action. Hence, the aim of this review is to discuss the biogenesis, isolation methods and role of EVs in the physiopathology of GDM, including changes in maternal insulin sensitivity during pregnancy.
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Affiliation(s)
- Soumyalekshmi Nair
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, University of Queensland Centre for Clinical Research, Royal Brisbane and Women's Hospital, The University of Queensland, Brisbane, QLD, Australia
| | - Valeska Ormazabal
- Department of Pharmacology, Faculty of Biological Sciences, University of Concepción, Concepción, Chile
| | - Martha Lappas
- Obstetrics, Nutrition and Endocrinology Group, Department of Obstetrics and Gynaecology, University of Melbourne, Heidelberg, Vic., Australia.,Mercy Perinatal Research Centre, Mercy Hospital for Women, Heidelberg, Vic., Australia
| | - H David McIntyre
- Mater Research, The University of Queensland, South Brisbane, Qld, Australia
| | - Carlos Salomon
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, University of Queensland Centre for Clinical Research, Royal Brisbane and Women's Hospital, The University of Queensland, Brisbane, QLD, Australia.,Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, University of Concepción, Concepción, Chile
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3
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Avisar A, Cohen M, Brenner B, Bronshtein T, Machluf M, Bar-Sela G, Aharon A. Extracellular Vesicles Reflect the Efficacy of Wheatgrass Juice Supplement in Colon Cancer Patients During Adjuvant Chemotherapy. Front Oncol 2020; 10:1659. [PMID: 32984039 PMCID: PMC7479215 DOI: 10.3389/fonc.2020.01659] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 07/28/2020] [Indexed: 12/12/2022] Open
Abstract
Introduction Colorectal cancer (CC) is the third most common type of cancer, accounting for 10% of all cancer cases. Adjuvant chemotherapy is recommended in stages II–III CC. Wheatgrass juice (WGJ) from wheat seeds has high nutritional values, may induce synergistic benefits to chemotherapy and may attenuate chemotherapy-related side effects. Extracellular vesicles (EVs) are subcellular membrane blebs. EVs include exosomes (generated in the endosome, in size <150 nm) and microvesicles (shed from the plasma cell membrane) provide information on their parental cells and play a role in intercellular communication. We aimed to elucidate the effects of chemotherapy administration with supportive treatment of WGJ on CC patients’ EVs characteristics. Methods EVs were isolated from the blood samples of 15 healthy controls (HCs) and 50 CC patients post-surgery, treated by chemotherapy, with or without additional daily WGJ. Blood samples were taken before, during, and at the end of chemotherapy. EVs were characterized by size, concentration, membrane antigens and cytokine content using nanoparticle-tracking analysis, western blot, flow cytometry, and protein array methods. Results EVs were found to be similar by size and concentration with reduced levels of exosome markers (CD81) on samples at the end of combined treatment (chemotherapy and WGJ). Higher levels of endothelial EVs, which may indicate impairment of the vascular endothelial cells during treatment, were found in CC patients treated by chemotherapy only compared to those with chemotherapy and daily WGJ. Also, EVs thrombogenicity was lower in patients added WGJ compared to patients who had only chemotherapy (levels of tissue factor p = 0.029 and endothelial protein C receptor p = 0.005). Following treatments, levels of vascular endothelial growth factor receptors (VEGFR-1) and the majority of growth-factors/pro-inflammatory cytokines were higher in EVs of patients treated by chemotherapy only than in EVs obtained from patients with the combined treatment. Conclusion Daily consumption of WGJ during chemotherapy may reduce vascular damage and chemotherapy-related thrombogenicity, growth factors and cytokines, as reflected by the characteristics of patient’s EVs.
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Affiliation(s)
- Adva Avisar
- The Graduate Studies Authority, University of Haifa, Haifa, Israel
| | - Miri Cohen
- School of Social Work, Faculty of Social Welfare and Health Sciences, University of Haifa, Haifa, Israel
| | - Benjamin Brenner
- Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel.,Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Tomer Bronshtein
- The Lab for Cancer Drug Delivery & Cell Based Technologies, The Faculty of Biotechnology and Food Engineering, Technion - Israel Institute of Technology, Haifa, Israel
| | - Marcelle Machluf
- The Lab for Cancer Drug Delivery & Cell Based Technologies, The Faculty of Biotechnology and Food Engineering, Technion - Israel Institute of Technology, Haifa, Israel
| | - Gil Bar-Sela
- Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel.,Cancer Center, Emek Medical Center, Afula, Israel
| | - Anat Aharon
- Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel.,Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel.,Hematology Research Laboratory, Hematology and Bone Marrow Transplantation, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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4
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Aharon A, Spector P, Ahmad RS, Horrany N, Sabbach A, Brenner B, Aharon-Peretz J. Extracellular Vesicles of Alzheimer's Disease Patients as a Biomarker for Disease Progression. Mol Neurobiol 2020; 57:4156-4169. [PMID: 32676990 DOI: 10.1007/s12035-020-02013-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 07/08/2020] [Indexed: 12/23/2022]
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative brain pathology and the most common form of dementia. Evidence suggests that extracellular vesicles (EVs) containing cytokines and microRNA are involved in inflammation regulation. The current study aimed to explore a potential impact of AD patients' EVs on disease progression. Blood samples were collected after obtaining signed informed consent (No. 0462-14-RMB) from 42 AD patients at three stages of disease severity and from 19 healthy controls (HC). EV size and concentration were studied by nanotracking analysis. EV membrane antigens were defined by flow cytometry and Western blot; EV protein contents were screened by protein array; the miRNA content was screened by nanostring technology and validated by RT-PCR. HC and AD patients' EVs consisted of a mixture of small (< 100 nm) and larger vesicles. The myelin oligodendrocyte glycoprotein (MOG) expression on EVs correlated with disease severity. EVs of patients with moderate and severe AD had significantly higher levels of MOG, compared with mild AD patients. Levels of EVs expressing the axonal glycoprotein CD171 were significantly higher in severe AD patients than in HC. Increase in endothelial EVs was observed in AD patients. An above twofold increase was found in the content of inflammatory cytokines and > 50% decrease in growth factors in AD patients' EVs compared with HC-EVs. Levels of let-7g-5p, miR126-3p, miR142-3p, miR-146a-5p, and mir223-3p correlated with disease severity. Neural damage, specific miRNA downregulation, and inflammatory cytokine upregulation, found in patients' EVs, might be used as a biomarker reflecting AD severity.
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Affiliation(s)
- Anat Aharon
- Tel Aviv Sourasky Medical Center, Tel-Aviv, Israel. .,Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel. .,Bruce Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel.
| | - Polina Spector
- Cognitive Neurology Unit, Rambam Health Care Campus, Haifa, Israel
| | | | - Nizar Horrany
- Cognitive Neurology Unit, Rambam Health Care Campus, Haifa, Israel
| | - Annie Sabbach
- Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel
| | - Benjamin Brenner
- Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel.,Bruce Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
| | - Judith Aharon-Peretz
- Bruce Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel.,Cognitive Neurology Unit, Rambam Health Care Campus, Haifa, Israel
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5
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Nair S, Salomon C. Extracellular vesicles as critical mediators of maternal-fetal communication during pregnancy and their potential role in maternal metabolism. Placenta 2020; 98:60-68. [PMID: 33039033 DOI: 10.1016/j.placenta.2020.06.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 06/12/2020] [Accepted: 06/15/2020] [Indexed: 01/06/2023]
Abstract
Extracellular vesicles (EVs) have been implicated in the pathophysiology of metabolic disorders by transferring biologically active molecules such as miRNAs and proteins to recipient cells, and influencing their metabolic pathways. Pregnancy is one of the greatest metabolic challenges faced by both the mother and the growing fetus, and this is fine-tuned by several factors, including hormones, soluble molecules, and molecules encapsulated in EVs released from the placenta. A wide range of EVs originating from the placenta are present in maternal circulation, and changes in their circulating levels and bioactivity (i.e., capacity to induce changes in the target cells) have been associated with several complications of pregnancies, including gestational diabetes mellitus (GDM), preeclampsia, preterm birth, and fetal growth restriction. Complications of pregnancies are associated with maternal metabolic dysfunction with short- and long-term consequences for both mother and child. However, the potential roles of circulating EVs originating from the placenta and other tissues (e.g. adipose tissue), on changes in maternal metabolism during normal and pregnancy complications have not been fully described. The aim of this brief review, thus, is to discuss the diversity of EVs, and their potential roles in the metabolic alterations during pregnancy, with a special focus on GDM.
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Affiliation(s)
- Soumyalekshmi Nair
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, University of Queensland Centre for Clinical Research, Royal Brisbane and Women's Hospital, The University of Queensland, Brisbane, QLD, 4029, Australia
| | - Carlos Salomon
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, University of Queensland Centre for Clinical Research, Royal Brisbane and Women's Hospital, The University of Queensland, Brisbane, QLD, 4029, Australia; Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, University of Concepción, Concepción, Chile.
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6
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Lin H, Wang Q, Zhong R, Li Z, Zhao W, Chen Y, Tian M, Luo X. Biomimetic phosphorylcholine strategy to improve the hemocompatibility of pH-responsive micelles containing tertiary amino groups. Colloids Surf B Biointerfaces 2019; 184:110545. [PMID: 31629184 DOI: 10.1016/j.colsurfb.2019.110545] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Revised: 09/11/2019] [Accepted: 10/02/2019] [Indexed: 02/05/2023]
Abstract
pH-responsive nanocarriers such as polymeric micelles that self-assemble from amphiphilic copolymers containing amino groups have been limited by their significant effects on the blood and thus compromise of their hemocompatibility due to the amino group-induced positive charges. Here we report a biomimetic phosphorylcholine strategy to improve the hemocompatibility of the pH-responsive micelles with positive charges. Amphiphilic copolymers containing different number of tertiary amino groups were synthesized in five steps through ring opening polymerization, azide reaction, thio-bromo "Click" chemistry, and atom transfer radical polymerization to self-assemble biomimetic phosphorylcholine micelles with pH-responsiveness, which shown no significant effects on red blood cells, coagulation, and platelet activation. Moreover, albumin adsorption on the micelles was significantly lower than that of polycaprolactone-methoxypolyethylene glycol (PCL-mPEG) control, and in terms of immune cells, the micelles showed controllable phagocytosis that dependent on the number of tertiary amino groups, in which the one containing four tertiary amino groups in its corresponding copolymer remains had a lower phagocytosis by whole blood leukocyte than that of PCL-mPEG. Based on these results, the hemocompatibility related mechanism of the micelles was discussed and proposed. Our findings demonstrated that this biomimetic phosphorylcholine is a promising strategy to improve the hemocompatibility of the positively charged nanocarriers.
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Affiliation(s)
- Hu Lin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China; Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu, 610041, PR China
| | - Quan Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China
| | - Rui Zhong
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences & Peking Union Medical College, Chengdu, 610052, PR China
| | - Zhen Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China
| | - Weifeng Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China
| | - Yuanwei Chen
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China
| | - Meng Tian
- Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu, 610041, PR China; Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China; West China Brain Research Centre, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, PR China.
| | - Xianglin Luo
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China.
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7
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Han C, Wang C, Chen Y, Wang J, Xu X, Hilton T, Cai W, Zhao Z, Wu Y, Li K, Houck K, Liu L, Sood AK, Wu X, Xue F, Li M, Dong JF, Zhang J. Placenta-derived extracellular vesicles induce preeclampsia in mouse models. Haematologica 2019; 105:1686-1694. [PMID: 31439676 PMCID: PMC7271597 DOI: 10.3324/haematol.2019.226209] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 08/22/2019] [Indexed: 01/23/2023] Open
Abstract
Preeclampsia is a pregnancy-induced condition that impairs the mother’s health and results in pregnancy termination or premature delivery. Elevated levels of placenta-derived extracellular vesicles (pcEV) in the circulation have been consistently associated with preeclampsia, but whether these vesicles induce preeclampsia or are the product of preeclampsia is not known. Guided by a small cohort study of preeclamptic patients, we examined the impact of pcEV on the pathogenesis of preeclampsia in mouse models. We detected pcEV in pregnant C56BL/6J mice with a peak level of 3.8±0.9×107/mL at 17-18 days post-coitum. However, these pregnant mice developed hypertension and proteinuria only after being infused with vesicles purified from injured placenta. These extracellular vesicles released from injured placenta disrupted endothelial integrity and induced vasoconstriction. Enhancing the clearance of extracellular vesicles prevented the development of the extracellular vesicle-induced preeclampsia in mice. Our results demonstrate a causal role of pcEV in preeclampsia and identify microvesicle clearance as a new therapeutic strategy for the treatment of this pregnancy-associated complication.
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Affiliation(s)
- Cha Han
- Department of Obstetrics and Gynecology, Tianjin Medical University General Hospital, Tianjin, China.,Bloodworks Research Institute, Seattle, WA, USA
| | - Chenyu Wang
- Institute of Pathology, School of Medical Sciences and Gansu Provincial Key Laboratory of Preclinical Study for New Drug Development, Lanzhou University, Lanzhou, China
| | - Yuanyuan Chen
- Department of Obstetrics and Gynecology, Tianjin Medical University General Hospital, Tianjin, China
| | - Jiwei Wang
- Department of Neurosurgery, Tianjin Key Laboratory of Cerebral Vascular and Neurodegenerative Diseases, Tianjin Huanhu Hospital, Tianjin, China
| | - Xin Xu
- Bloodworks Research Institute, Seattle, WA, USA
| | | | - Wei Cai
- Institute of Pathology, School of Medical Sciences and Gansu Provincial Key Laboratory of Preclinical Study for New Drug Development, Lanzhou University, Lanzhou, China
| | - Zilong Zhao
- Department of Neurosurgery, Tianjin Medical University General Hospital and Tianjin Neurological Institute, Tianjin, China
| | - Yingang Wu
- Department of Neurosurgery, the First Affiliated Hospital, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Ke Li
- Department of Obstetrics and Gynecology, Tianjin Medical University General Hospital, Tianjin, China
| | - Katie Houck
- Bloodworks Research Institute, Seattle, WA, USA
| | - Li Liu
- Department of Neurosurgery, Tianjin Medical University General Hospital and Tianjin Neurological Institute, Tianjin, China
| | - Anil K Sood
- Department of Gynecologic Oncology and Reproductive Medicine, Division of Surgery, MD Anderson Cancer Center, University of Texas, Houston, TX, USA
| | - Xiaoping Wu
- Bloodworks Research Institute, Seattle, WA, USA
| | - Fengxia Xue
- Department of Obstetrics and Gynecology, Tianjin Medical University General Hospital, Tianjin, China
| | - Min Li
- Institute of Pathology, School of Medical Sciences and Gansu Provincial Key Laboratory of Preclinical Study for New Drug Development, Lanzhou University, Lanzhou, China
| | - Jing-Fei Dong
- Bloodworks Research Institute, Seattle, WA, USA .,Division of Hematology, Department of Medicine, University of Washington, School of Medicine, Seattle, WA, USA
| | - Jianning Zhang
- Department of Neurosurgery, Tianjin Medical University General Hospital and Tianjin Neurological Institute, Tianjin, China
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8
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Zarfati M, Avivi I, Brenner B, Katz T, Aharon A. Extracellular vesicles of multiple myeloma cells utilize the proteasome inhibitor mechanism to moderate endothelial angiogenesis. Angiogenesis 2018; 22:185-196. [PMID: 30386953 DOI: 10.1007/s10456-018-9649-y] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 09/19/2018] [Indexed: 02/07/2023]
Abstract
Bone marrow microenvironment is known to support angiogenesis, thus contributing to progression of multiple myeloma (MM). Bortezomib, a proteasome inhibitor (PI) widely used in MM treatment, has anti-angiogenic activity. Extracellular vesicles (EVs), shedding from cell surface, serve as mediators in cell-to-cell communication. We have hypothesized that MM cells (MMCs) treated with bortezomib generate EVs that could diminish angiogenesis, thus limiting MM progression. In the present study, EVs were obtained from MMCs (RPMI-8226), untreated (naïve) or pre-treated with bortezomib. EVs were outlined using NanoSight, FACS, protein arrays and proteasome activity assays. The impact of MMC-EVs on endothelial cell (EC) functions was assessed, employing XTT assay, Boyden chamber and Western blot. A high apoptosis level (annexin V binding 70.25 ± 16.37%) was observed in MMCs following exposure to bortezomib. Compared to naïve EVs, a large proportion of bortezomib-induced EVs (Bi-EVs) were bigger in size (> 300 nm), with higher levels of annexin V binding (p = 0.0043).They also differed in content, presenting with increased levels of pro-inflammatory proteins, reduced levels of pro-angiogenic growth factors (VEGFA, PDGF-BB, angiogenin), and displayed lower proteasome activity. Naïve EVs were found to promote EC migration and proliferation via ERK1/2 and JNK1/2/3 phosphorylation, whereas Bi-EVs inhibited these functions. Moreover, Bi-EVs appeared to reduce EC proteasome activity. EVs released from apoptotic MMCs following treatment with bortezomib can promote angiogenesis suppression by decreasing proliferation and migration of EC. These activities are found to be mediated by specific signal transduction pathways.
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Affiliation(s)
- Moran Zarfati
- Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel
| | - Irit Avivi
- Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel.,Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, 7, Ha'Aliya St., Haifa, 3109601, Israel
| | - Benjamin Brenner
- Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel.,Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, 7, Ha'Aliya St., Haifa, 3109601, Israel
| | - Tami Katz
- Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel.,Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, 7, Ha'Aliya St., Haifa, 3109601, Israel
| | - Anat Aharon
- Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel. .,Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, 7, Ha'Aliya St., Haifa, 3109601, Israel.
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9
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Simon C, Greening DW, Bolumar D, Balaguer N, Salamonsen LA, Vilella F. Extracellular Vesicles in Human Reproduction in Health and Disease. Endocr Rev 2018; 39:292-332. [PMID: 29390102 DOI: 10.1210/er.2017-00229] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 01/25/2018] [Indexed: 02/07/2023]
Abstract
Extensive evidence suggests that the release of membrane-enclosed compartments, more commonly known as extracellular vesicles (EVs), is a potent newly identified mechanism of cell-to-cell communication both in normal physiology and in pathological conditions. This review presents evidence about the formation and release of different EVs, their definitive markers and cargo content in reproductive physiological processes, and their capacity to convey information between cells through the transfer of functional protein and genetic information to alter phenotype and function of recipient cells associated with reproductive biology. In the male reproductive tract, epididymosomes and prostasomes participate in regulating sperm motility activation, capacitation, and acrosome reaction. In the female reproductive tract, follicular fluid, oviduct/tube, and uterine cavity EVs are considered as vehicles to carry information during oocyte maturation, fertilization, and embryo-maternal crosstalk. EVs via their cargo might be also involved in the triggering, maintenance, and progression of reproductive- and obstetric-related pathologies such as endometriosis, polycystic ovarian syndrome, preeclampsia, gestational diabetes, and erectile dysfunction. In this review, we provide current knowledge on the present and future use of EVs not only as biomarkers, but also as therapeutic targeting agents, mainly as vectors for drug or compound delivery into target cells and tissues.
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Affiliation(s)
- Carlos Simon
- Igenomix Foundation, Valencia, Spain.,Instituto de Investigación Sanitaria Hospital Clínico (INCLIVA), Valencia, Spain.,Department of Pediatrics, Obstetrics and Gynecology, School of Medicine, Valencia University, Valencia, Spain.,Department of Obstetrics and Gynecology, Stanford University, Palo Alto, California
| | - David W Greening
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria, Australia
| | - David Bolumar
- Igenomix Foundation, Valencia, Spain.,Instituto de Investigación Sanitaria Hospital Clínico (INCLIVA), Valencia, Spain
| | - Nuria Balaguer
- Igenomix Foundation, Valencia, Spain.,Instituto de Investigación Sanitaria Hospital Clínico (INCLIVA), Valencia, Spain
| | - Lois A Salamonsen
- Centre for Reproductive Health, Hudson Institute of Medical Research, Clayton, Victoria, Australia.,Department of Molecular and Translational Science, Monash University, Clayton, Victoria, Australia.,Department of Obstetrics and Gynaecology, Monash University, Clayton, Victoria, Australia
| | - Felipe Vilella
- Igenomix Foundation, Valencia, Spain.,Instituto de Investigación Sanitaria Hospital Clínico (INCLIVA), Valencia, Spain.,Department of Obstetrics and Gynecology, Stanford University, Palo Alto, California
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10
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Shantsila E, Montoro-García S, Gallego P, Lip GYH. Circulating microparticles: challenges and perspectives of flow cytometric assessment. Thromb Haemost 2017; 111:1009-14. [DOI: 10.1160/th13-11-0937] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Accepted: 01/07/2014] [Indexed: 12/18/2022]
Abstract
SummaryCirculating blood microparticles are likely to play a significant role as messengers of biological information. Their accurate quantification and characterisation is challenging and needs to be carefully designed with preferable usage of fresh minimally-processed blood samples. Utilisation of flow cytometers specifically designed for analysis of small-size particles is likely to provide considerable methodological advantages and should be the preferable option. This viewpoint manuscript provides a critical summary of the key methodological aspects of microparticle analysis.Note: The review process for this viewpoint article was fully handled by Christian Weber, Editor in Chief.
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11
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Aharon A, Sabbah A, Ben-Shaul S, Berkovich H, Loven D, Brenner B, Bar-Sela G. Chemotherapy administration to breast cancer patients affects extracellular vesicles thrombogenicity and function. Oncotarget 2017; 8:63265-63280. [PMID: 28968987 PMCID: PMC5609919 DOI: 10.18632/oncotarget.18792] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 05/23/2017] [Indexed: 12/15/2022] Open
Abstract
Breast cancer (BC) is the most prevalent type of malignancy in women. Extracellular vesicles (EVs) are subcellular membrane blebs that include exosomes and microparticles.
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Affiliation(s)
- Anat Aharon
- Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel.,Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Anni Sabbah
- Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel
| | - Shahar Ben-Shaul
- Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel
| | - Hila Berkovich
- Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel
| | - David Loven
- Department of Oncology, Ha'emek Medical Center, Afula, Israel
| | - Benjamin Brenner
- Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel.,Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Gil Bar-Sela
- Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel.,Department of Oncology, Rambam Health Care Campus, Haifa, Israel
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12
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Koifman N, Biran I, Aharon A, Brenner B, Talmon Y. A direct-imaging cryo-EM study of shedding extracellular vesicles from leukemic monocytes. J Struct Biol 2017; 198:177-185. [PMID: 28254382 DOI: 10.1016/j.jsb.2017.02.004] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 02/09/2017] [Accepted: 02/14/2017] [Indexed: 02/08/2023]
Abstract
The human leukemia monocytic cell line (THP-1) is known to shed extracellular vesicles (EVs) under various stimulations. We studied the effects of two types of common stimulation types, lipopolysaccharide (LPS) and starvation conditions by high resolution cryogenic electron microscopy, namely, cryo-SEM and cryo-TEM. Cryo-SEM data of cells undergoing EV blebbing and shedding is presented here for the first time. The high-resolution images show good agreement with models describing the membrane processes of shedding. Cells that underwent a 48-h starvation treatment exhibited differing morphological features, including shrunken nucleus and elongated membrane protrusions. LPS treated cells, however, showed extensive blebbing originating from the cell membrane, in good agreement with the sizes of EVs imaged by cryo-TEM. EVs isolated from both types of stimulations were measured by nanoparticle tracking analysis (NanoSight), by which LPS-EVs samples exhibited higher concentration and smaller mean diameter, as compared to starvation-EVs. Our results suggest a difference in the effects of the two stimulation types on the shedding process and possibly on the type of EVs shed. Our unique methodologies provide an important and innovative outlook of the shedding process and on its products, paving the way to further discoveries in this developing field of research, in which much is still unknown.
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Affiliation(s)
- Na'ama Koifman
- Department of Chemical Engineering and the Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Idan Biran
- Department of Chemical Engineering and the Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Anat Aharon
- The Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 3525433, Israel; Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa 3109601, Israel
| | - Benjamin Brenner
- The Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa 3525433, Israel; Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa 3109601, Israel
| | - Yeshayahu Talmon
- Department of Chemical Engineering and the Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
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Shomer E, Katzenell S, Zipori Y, Rebibo-Sabbah A, Brenner B, Aharon A. Microvesicles of pregnant women receiving low molecular weight heparin improve trophoblast function. Thromb Res 2015; 137:141-147. [PMID: 26639203 DOI: 10.1016/j.thromres.2015.11.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 11/16/2015] [Accepted: 11/18/2015] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Microvesicles including exosomes and microparticles, participate in the placental-maternal crosstalk in normal pregnancies and gestational vascular complications (GVC). Low molecular weight heparin (LMWH) is known to reduce the risk of placenta-mediated pregnancy complications. This study was aimed to characterize microvesicles of pregnant women receiving LMWH and explore microvesicle involvement in trophoblast and endothelial cell function. MATERIALS AND METHODS Microvesicles were isolated from blood samples obtained from non-pregnant women, healthy pregnant women (HP) and pregnant woman treated with LMWH. Microvesicle protein contents were assessed by protein array and ELISA. Microvesicle effects on early stage trophoblasts, term trophoblasts and endothelial cell migration, angiogenesis and apoptosis were evaluated. RESULTS Microvesicles derived from the group treated with LMWH contained higher levels of several proangiogenic proteins compared to those of HP women. Exposure of endothelial cells to circulating microvesicles derived from HP and LMWH treated groups induced significantly higher cell migration and branch tube formation compared to untreated cells. The effect of microvesicles from HP- and LMWH groups on early-stage trophoblast migration was similar. Microvesicles derived from these two study groups significantly decreased early-stage trophoblast apoptosis, while microvesicles derived from the HP-group (but not from the LMWH-group) significantly increased the term trophoblast apoptosis (TUNEL assay) compared to untreated cells. CONCLUSION Therapy with LMWH affects patients' microvesicle content, leading to normalization of invasion, angiogenesis activity and survival of endothelial and trophoblast cells in vitro. The effects of LMWH on microvesicles may point to an additional mechanism of heparin action in high-risk pregnancy.
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Affiliation(s)
- Einat Shomer
- Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel; Rambam Health Care Campus, Haifa, Israel
| | - Sarah Katzenell
- Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel; Rambam Health Care Campus, Haifa, Israel
| | - Yaniv Zipori
- Department of Obstetrics and Gynecology, Rambam Health Care Campus, Haifa, Israel
| | - Annie Rebibo-Sabbah
- Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel
| | - Benjamin Brenner
- Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel; Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel
| | - Anat Aharon
- Bruce Rappaport Faculty of Medicine, Technion, Haifa, Israel; Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel.
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Tzoran I, Rebibo-Sabbah A, Brenner B, Aharon A. Disease dynamics in patients with acute myeloid leukemia: new biomarkers. Exp Hematol 2015; 43:936-43. [PMID: 26232698 DOI: 10.1016/j.exphem.2015.07.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 07/15/2015] [Accepted: 07/21/2015] [Indexed: 12/14/2022]
Abstract
Acute myeloid leukemia (AML) is characterized by rapid growth of leukemic blast cells. Extracellular vesicles (EVs), shedding from various cells, express antigens, reflecting their cellular origin. The current study was designed to explore the role of circulating EVs as potential biomarkers of AML activity and predictors of thrombogenicity in patients with this malignancy. Blood samples were collected from healthy controls and patients with newly diagnosed AML at three time points: diagnosis, nadir, and remission. EV concentration, cell origin, and expression of coagulation proteins were characterized using fluorescence-activated cell sorting. EV cytokine contents were evaluated by protein array. Procoagulant activity was assessed using Factor Xa chromogenic assay. Forty-two AML patients were enrolled in the study. Total EV numbers were higher in patients in first remission compared with controls, whereas blast EV counts were higher in patients at diagnosis compared with controls and patients in remission. Blast EV levels were significantly lower in patients who achieved remission and were alive at 3-year follow up compared with their succumbed counterparts. At all three time points, percentage of endothelial EVs was higher in patients compared with controls. EV procoagulant activity was elevated at diagnosis and in remission, and, unlike controls' EVs, patients' EVs increased endothelial cell thrombogenicity. EVs of AML patients express membrane proteins of blast cells and might serve as biomarkers of leukemia dynamics and presence of minimal residual disease. Increased levels of endothelial EVs and their procoagulant activity may indicate a vascular injury associated with a hypercoagulable state in AML.
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Affiliation(s)
- Inna Tzoran
- Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel; Internal Medicine C, Rambam Health Care Campus, Haifa, Israel; Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel.
| | - Annie Rebibo-Sabbah
- Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel; Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel
| | - Benjamin Brenner
- Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel; Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel
| | - Anat Aharon
- Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, Haifa, Israel; Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel
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Aharon A. The role of extracellular vesicles in placental vascular complications. Thromb Res 2015; 135 Suppl 1:S23-5. [DOI: 10.1016/s0049-3848(15)50435-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Liu S, Wei L, Zhang Y, Xu M, Wang C, Zhou J. Procoagulant activity and cellular origin of microparticles in human amniotic fluid. Thromb Res 2014; 133:645-51. [DOI: 10.1016/j.thromres.2013.12.043] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 12/13/2013] [Accepted: 12/31/2013] [Indexed: 11/30/2022]
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Greer IA, Brenner B, Gris JC. Antithrombotic treatment for pregnancy complications: which path for the journey to precision medicine? Br J Haematol 2014; 165:585-99. [PMID: 24593333 DOI: 10.1111/bjh.12813] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2013] [Accepted: 01/02/2014] [Indexed: 01/31/2023]
Abstract
Haemostatic and vascular biology mechanisms appear to play an important role in the pathogenesis of placenta-mediated pregnancy complications. Although low-dose aspirin (LDA) has a modest effect in preventing preeclampsia, antithrombotic interventions, LDA and low molecular weight heparin (LMWH) have not definitively proven their effectiveness in women with placenta-mediated pregnancy complications selected by previous pregnancy outcome alone. Given the heterogeneous aetiology of placenta-mediated pregnancy complications, it is critical to stratify patients according to maternal and fetal characteristics and disease mechanisms rather than simply by pregnancy outcome, such as miscarriage. Such stratification could identify those who could benefit from antithrombotic interventions in pregnancy. We lack data on genome-wide association studies, biomarkers and trials of interventions applied to specific homogeneous populations. Future studies should focus on elaborating different disease mechanisms and examining antithrombotic interventions in specific and more homogeneous groups, such as thrombophilic women with well-characterized placenta-mediated pregnancy complications, stratified by disease severity and pathological findings. Because of fetal safety concerns with new anticoagulants, the intervention should focus on heparins alone or in combination with LDA. Thus, placenta-mediated pregnancy complications deserve precision medicine, defining disease by mechanism rather than outcome with interventions focused on a more personalized approach.
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Affiliation(s)
- Ian A Greer
- Faculty of Health & Life Sciences, University of Liverpool, Liverpool, UK
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Issman L, Brenner B, Talmon Y, Aharon A. Cryogenic transmission electron microscopy nanostructural study of shed microparticles. PLoS One 2013; 8:e83680. [PMID: 24386253 PMCID: PMC3873325 DOI: 10.1371/journal.pone.0083680] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Accepted: 11/06/2013] [Indexed: 11/21/2022] Open
Abstract
Microparticles (MPs) are sub-micron membrane vesicles (100–1000 nm) shed from normal and pathologic cells due to stimulation or apoptosis. MPs can be found in the peripheral blood circulation of healthy individuals, whereas elevated concentrations are found in pregnancy and in a variety of diseases. Also, MPs participate in physiological processes, e.g., coagulation, inflammation, and angiogenesis. Since their clinical properties are important, we have developed a new methodology based on nano-imaging that provides significant new data on MPs nanostructure, their composition and function. We are among the first to characterize by direct-imaging cryogenic transmitting electron microscopy (cryo-TEM) the near-to-native nanostructure of MP systems isolated from different cell types and stimulation procedures. We found that there are no major differences between the MP systems we have studied, as most particles were spherical, with diameters from 200 to 400 nm. However, each MP population is very heterogeneous, showing diverse morphologies. We investigated by cryo-TEM the effects of standard techniques used to isolate and store MPs, and found that either high-g centrifugation of MPs for isolation purposes, or slow freezing to –80°C for storage introduce morphological artifacts, which can influence MP nanostructure, and thus affect the efficiency of these particles as future diagnostic tools.
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Affiliation(s)
- Liron Issman
- Department of Chemical Engineering and The Russell Berrie Nanotechnology Institute (RBNI), Technion-Israel Institute of Technology, Haifa, Israel
- * E-mail: (LI); (YT)
| | - Benjamin Brenner
- The Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
- Thrombosis and Hemostasis Unit, Department of Hematology, Rambam Health Care Campus, Haifa, Israel
| | - Yeshayahu Talmon
- Department of Chemical Engineering and The Russell Berrie Nanotechnology Institute (RBNI), Technion-Israel Institute of Technology, Haifa, Israel
- * E-mail: (LI); (YT)
| | - Anat Aharon
- The Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
- Thrombosis and Hemostasis Unit, Department of Hematology, Rambam Health Care Campus, Haifa, Israel
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Gris JC. Blood dust as active circulating cellular representatives during gestational vascular complications. Hypertension 2013; 62:825-6. [PMID: 24082056 DOI: 10.1161/hypertensionaha.113.02126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Jean-Christophe Gris
- Consultations et Laboratoire d'hématologie, Centre Hospitalier Universitaire, Groupe Hospitalo-Universitaire Carémeau, Place du Pr. Robert Debré, F-30029 Nîmes cedex 9, France.
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Abstract
Microparticles (MPs), sub-micron membrane vesicles, participate in the placental and maternal crosstalk in normal pregnancies as well as in gestational vascular complications (GVC). The article will review the effects of MPs on placental physiological processes, including hemostasis, trophoblast migration, invasion, placental vasculature and their involvement in pathologic states such as thrombosis, inflammation and endothelial dysfunction, resulting in GVC.
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Affiliation(s)
- Anat Aharon
- Thrombosis & Hemostasis Unit, Rambam Health Care Campus and Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology Haifa, Israel.
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Shomer E, Katzenell S, Zipori Y, Sammour RN, Isermann B, Brenner B, Aharon A. Microvesicles of women with gestational hypertension and preeclampsia affect human trophoblast fate and endothelial function. Hypertension 2013; 62:893-8. [PMID: 24082057 DOI: 10.1161/hypertensionaha.113.01494] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Microvesicles shedding from cell membrane affect inflammation, apoptosis, and angiogenesis. We hypothesize that microvesicles of women with gestational vascular complications reflect pathophysiological state of the patients and affect their endothelial and trophoblast cell function. Microvesicles of healthy pregnant women, women with gestational hypertension, mild, or severe preeclampsia/toxemia, were characterized, and their effects on early-stage or term trophoblasts and endothelial cells were evaluated using apoptosis, migration, and tube formation assays. Patient subgroups differed significantly only in proteinuria levels, therefore their microvesicles were assessed as 1 group, demonstrating higher levels of inflammatory and angiogenic proteins compared with those of healthy pregnant women. In endothelial cells, microvesicles of healthy pregnant women reduced caspase 3/7 activity, increased migration, and induced tube formation. These processes were suppressed by microvesicles of women with gestational vascular complications. In early-stage trophoblasts, microvesicles of healthy pregnant women decreased apoptosis compared with untreated cells (6±5% versus 13.8±5.8%; P<0.001) and caspase 3/7 activity and induced higher migration (39.7±10.1 versus 20.3±8.3 mm2; P<0.001). This effect was mediated through extracellular signal-regulated kinase pathway. Conversely, microvesicles of women with gestational vascular complications increased term trophoblast apoptosis compared with cells exposed to microvesicles of healthy pregnant women (15.1±3.3% versus 6.5±2.1%; P<0.001) and inhibited early-stage trophoblasts migration (21.4±18.5 versus 39.7±10.1 mm2; P<0.001). In conclusion, microvesicle content and effects on endothelial and trophoblast cells vary according to the physiological/pathological state of a pregnant woman. Microvesicles seem to play a pivotal role in the course of pregnancy, which could potentially result in gestational vascular complications.
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Affiliation(s)
- Einat Shomer
- Thrombosis and Hemostasis Unit, Department of Hematology, Rambam Health Care Campus, P.O. Box 9602, Haifa 31096, Israel.
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Ma G, Liu F, Lv L, Gao Y, Su Y. Increased promyelocytic-derived microparticles: a novel potential factor for coagulopathy in acute promyelocytic leukemia. Ann Hematol 2013; 92:645-52. [PMID: 23344645 DOI: 10.1007/s00277-013-1676-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Accepted: 01/06/2013] [Indexed: 10/27/2022]
Abstract
The frequent serious bleeding and thrombotic complications in acute promyelocytic leukemia (APL) are major causes of early mortality, but the complex mechanisms causing the bleeding have not been completely elucidated. Because microparticles (MPs) are known to be elevated in thromboembolic disorders, we hypothesized a role for MPs in the pathogenesis of coagulopathy in APL. MPs were isolated from 30 APL patients and 20 healthy subjects and from cultured NB4/APL cells. The morphology of the MPs was examined, and they were quantified and analyzed for their thrombin-generating potential. We confirmed the existence of promyelocytic-derived MPs by morphology using transmission electron microscopy and laser scanning confocal microscopy. Counts of MPs in APL were elevated and were typically from promyelocytic cells (CD33(+) TF(+) MPs). Importantly, the CD33(+) MPs strongly correlated with patient leukocyte count (R = 0.64, p = 0.002) and D-dimer (R = 0.51, p = 0.0038). Moreover, the MPs from patients with APL decreased the coagulation times and induced thrombin generation. APL MP-associated thrombin generation was reduced by 54 % when the extrinsic pathway was blocked using an anti-human tissue factor (TF) antibody. However, neither anti-factor XI nor anti-tissue factor pathway inhibitor had any significant inhibitory effect. Our results show that the procoagulant state in APL is partially due to the TF-dependent procoagulant properties of circulating promyelocytic-derived MPs. TF(+) MPs may be a novel potential risk factor for coagulopathy in APL.
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Affiliation(s)
- Guibo Ma
- Department of Hematology, The First Affiliated Hospital of Harbin Medical University, 23 Youzheng Street, Nan Gang District, Harbin, China
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