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Chelnokova IA, Nikitina IA, Starodubtseva MN. Mechanical properties of blood exosomes and lipoproteins after the rat whole blood irradiation with X-rays in vitro explored by atomic force microscopy. Micron 2024; 184:103662. [PMID: 38838454 DOI: 10.1016/j.micron.2024.103662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 05/21/2024] [Accepted: 05/21/2024] [Indexed: 06/07/2024]
Abstract
Blood is a two-component system with two levels of hierarchy: the macrosystem of blood formed elements and the dispersed system of blood nanoparticles. Biological nanoparticles are the key participants in communication between the irradiated and non-irradiated cells and inducers of the non-targeted effects of ionizing radiation. The work aimed at studying by atomic force microscopy the structural, mechanical, and electrical properties of exosomes and lipoproteins (LDL/VLDL) isolated from rat blood after its exposure to X-rays in vitro. MATERIALS AND METHODS The whole blood of Wistar rats fed with a high-fat diet was irradiated with X-rays (1 and 100 Gy) in vitro. The structural and mechanical properties (the elastic modulus and nonspecific adhesion force) of exosome and lipoprotein isolates from the blood by ultracentrifugation method were studied using Bruker Bioscope Resolve atomic force microscope in PF QNM mode, their electric properties (the zeta-potential) was measured by electrophoretic mobility. RESULTS Lipoproteins isolated from non-irradiated blood were softer (Me(LQ; UQ): 7.8(4.9;12.1) MPa) compared to blood nanoparticles of its exosome fraction (34.8(22.6;44.9) MPa) containing both exosomes and non-membrane nanoparticles. X-ray blood irradiation with a dose of 1 Gy significantly weakened the elastic properties of lipoproteins. Exposure of the blood to 100 Gy X-rays made lipoproteins stiffer and their nonspecific adhesive properties stronger. The radiation effects on the mechanical parameters of exosomes and non-membrane nanoparticles in exosome fractions differed. The significant radiation-induced change in electric properties of the studied nanoparticles was detected only for lipoproteins in the blood irradiated with 1 Gy X-rays. The low-dose radiation-induced changes in zeta-potential and increase in lipoprotein size with the appearance of a soft thick surface layer indicate the formation of the modified lipoproteins covered with a corona from macromolecules of irradiated blood. CONCLUSION Our data obtained using the nanomechanical mapping mode of AFM are the first evidence of the significant radiation-induced changes in the structural and mechanical properties of the dispersed system of blood nanoparticles after the X-ray irradiation of the blood.
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Affiliation(s)
- Irina A Chelnokova
- Institute of Radiobiology of the National Academy of Sciences of Belarus, Gomel, Belarus.
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2
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Yuan P, Yan X, Zong X, Li X, Yang C, Chen X, Li Y, Wen Y, Zhu T, Xue W, Dai J. Modulating Elasticity of Liposome for Enhanced Cancer Immunotherapy. ACS NANO 2024. [PMID: 39140567 DOI: 10.1021/acsnano.4c09094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/15/2024]
Abstract
Cancer immunotherapy has emerged as a promising approach to cancer treatment in recent years. The physical and chemical properties of nanocarriers are critical factors that regulate the immune activation of antigen-presenting cells (APCs) in the tumor microenvironment (TME). Herein, we extensively investigated the behavior of liposome nanoparticles (Lipo-NPs) with different elasticities, focusing on their interaction with immune cells and their transport mechanisms from tumors to tumor-draining lymph nodes (tdLNs). Successfully preparing Lipo-NPs with distinct elastic properties, their varied behaviors were observed, concerning immune cell interaction. Soft Lipo-NPs exhibited an affinity to cell membranes, while those with medium elasticity facilitated the cargo delivery to macrophages through membrane fusion. Conversely, hard Lipo-NPs enter macrophages via classical cellular uptake pathways. Additionally, it was noted that softer Lipo-NPs displayed superior transport to tdLNs in vivo, attributed to their deformable nature with lower elasticity. As a result, the medium elastic Lipo-NPs with agonists (cGAMP), by activating the STING pathway and enhancing transport to tdLNs, promoted abundant infiltration of tumor-infiltrating lymphocytes (TILs), leading to notable antitumor effects and extended survival in a melanoma mouse model. Furthermore, this study highlighted the potential synergistic effect of medium elasticity Lipo-NPs with immune checkpoint blockade (ICB) therapy in preventing tumor immune evasion. These findings hold promise for guiding immune-targeted delivery systems in cancer immunotherapy, particularly in vaccine design for tdLNs targeting and eradicating metastasis within tdLNs.
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Affiliation(s)
- Pengfei Yuan
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Engineering Technology Research Center of Drug Carrier of Guangdong, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Xiaodie Yan
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Engineering Technology Research Center of Drug Carrier of Guangdong, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Xiaoqing Zong
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Engineering Technology Research Center of Drug Carrier of Guangdong, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Xiaodi Li
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Engineering Technology Research Center of Drug Carrier of Guangdong, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Caiqi Yang
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Engineering Technology Research Center of Drug Carrier of Guangdong, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Xinjie Chen
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Engineering Technology Research Center of Drug Carrier of Guangdong, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Yuchao Li
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Engineering Technology Research Center of Drug Carrier of Guangdong, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Yaoqi Wen
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Engineering Technology Research Center of Drug Carrier of Guangdong, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Tianci Zhu
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Engineering Technology Research Center of Drug Carrier of Guangdong, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Wei Xue
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Engineering Technology Research Center of Drug Carrier of Guangdong, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Jian Dai
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Engineering Technology Research Center of Drug Carrier of Guangdong, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
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3
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Ge Z, Dai S, Yu H, Zhao J, Yang W, Tan W, Sun J, Gan Q, Liu L, Wang Z. Nanomechanical Analysis of Living Small Extracellular Vesicles to Identify Gastric Cancer Cell Malignancy Based on a Biomimetic Peritoneum. ACS NANO 2024; 18:6130-6146. [PMID: 38349890 PMCID: PMC10906078 DOI: 10.1021/acsnano.3c02285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 02/03/2024] [Accepted: 02/08/2024] [Indexed: 02/15/2024]
Abstract
Gastric cancer is one of the most prevalent digestive malignancies. The lack of effective in vitro peritoneal models has hindered the exploration of the potential mechanisms behind gastric cancer's peritoneal metastasis. An accumulating body of research indicates that small extracellular vesicles (sEVs) play an indispensable role in peritoneal metastasis of gastric cancer cells. In this study, a biomimetic peritoneum was constructed. The biomimetic model is similar to real peritoneum in internal microstructure, composition, and primary function, and it enables the recurrence of peritoneal metastasis process in vitro. Based on this model, the association between the mechanical properties of sEVs and the invasiveness of gastric cancer was identified. By performing nanomechanical analysis on sEVs, we found that the Young's modulus of sEVs can be utilized to differentiate between malignant clinical samples (ascites) and nonmalignant clinical samples (peritoneal lavage). Furthermore, patients' ascites-derived sEVs were verified to stimulate the mesothelial-to-mesenchymal transition, thereby promoting peritoneal metastasis. In summary, nanomechanical analysis of living sEVs could be utilized for the noninvasive diagnosis of malignant degree and peritoneal metastasis of gastric cancer. This finding is expected to contribute future treatments.
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Affiliation(s)
- Zhixing Ge
- State
Key Laboratory of Robotics, Shenyang Institute
of Automation, Chinese Academy of Sciences, Shenyang 110016, China
- Institutes
for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
- University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Songchen Dai
- Department
of Surgical Oncology and General Surgery, The First Hospital of China Medical University, Shenyang 110016, China
- Key
Laboratory of Precision Diagnosis and Treatment of Gastrointestinal
Tumors, Ministry of Education, Shenyang 110016, China
| | - Haibo Yu
- State
Key Laboratory of Robotics, Shenyang Institute
of Automation, Chinese Academy of Sciences, Shenyang 110016, China
- Institutes
for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
| | - Junhua Zhao
- Department
of Surgical Oncology and General Surgery, The First Hospital of China Medical University, Shenyang 110016, China
- Key
Laboratory of Precision Diagnosis and Treatment of Gastrointestinal
Tumors, Ministry of Education, Shenyang 110016, China
| | - Wenguang Yang
- School of
Electromechanical and Automotive Engineering, Yantai University, Yantai 264005, China
| | - Wenjun Tan
- State
Key Laboratory of Robotics, Shenyang Institute
of Automation, Chinese Academy of Sciences, Shenyang 110016, China
- Institutes
for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
- University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Jingxu Sun
- Department
of Surgical Oncology and General Surgery, The First Hospital of China Medical University, Shenyang 110016, China
- Key
Laboratory of Precision Diagnosis and Treatment of Gastrointestinal
Tumors, Ministry of Education, Shenyang 110016, China
| | - Quan Gan
- State
Key Laboratory of Robotics, Shenyang Institute
of Automation, Chinese Academy of Sciences, Shenyang 110016, China
- Institutes
for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
- University
of Chinese Academy of Sciences, Beijing 100049, China
| | - Lianqing Liu
- State
Key Laboratory of Robotics, Shenyang Institute
of Automation, Chinese Academy of Sciences, Shenyang 110016, China
- Institutes
for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110016, China
| | - Zhenning Wang
- Department
of Surgical Oncology and General Surgery, The First Hospital of China Medical University, Shenyang 110016, China
- Key
Laboratory of Precision Diagnosis and Treatment of Gastrointestinal
Tumors, Ministry of Education, Shenyang 110016, China
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Ridolfi A, Conti L, Brucale M, Frigerio R, Cardellini J, Musicò A, Romano M, Zendrini A, Polito L, Bergamaschi G, Gori A, Montis C, Panella S, Barile L, Berti D, Radeghieri A, Bergese P, Cretich M, Valle F. Particle profiling of EV-lipoprotein mixtures by AFM nanomechanical imaging. J Extracell Vesicles 2023; 12:e12349. [PMID: 37855042 PMCID: PMC10585431 DOI: 10.1002/jev2.12349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 07/08/2023] [Indexed: 10/20/2023] Open
Abstract
The widely overlapping physicochemical properties of lipoproteins (LPs) and extracellular vesicles (EVs) represents one of the main obstacles for the isolation and characterization of these pervasive biogenic lipid nanoparticles. We herein present the application of an atomic force microscopy (AFM)-based quantitative morphometry assay to the rapid nanomechanical screening of mixed LPs and EVs samples. The method can determine the diameter and the mechanical stiffness of hundreds of individual nanometric objects within few hours. The obtained diameters are in quantitative accord with those measured via cryo-electron microscopy (cryo-EM); the assignment of specific nanomechanical readout to each object enables the simultaneous discrimination of co-isolated EVs and LPs even if they have overlapping size distributions. EVs and all classes of LPs are shown to be characterised by specific combinations of diameter and stiffness, thus making it possible to estimate their relative abundance in EV/LP mixed samples in terms of stoichiometric ratio, surface area and volume. As a side finding, we show how the mechanical behaviour of specific LP classes is correlated to distinctive structural features revealed by cryo-EM. The described approach is label-free, single-step and relatively quick to perform. Importantly, it can be used to analyse samples which prove very challenging to assess with several established techniques due to ensemble-averaging, low sensibility to small particles, or both, thus providing a very useful tool for quickly assessing the purity of EV/LP isolates including plasma- and serum-derived preparations.
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Affiliation(s)
- Andrea Ridolfi
- Consiglio Nazionale delle RicercheIstituto per lo Studio dei Materiali NanostrutturatiBolognaItaly
| | - Laura Conti
- Consiglio Nazionale delle RicercheIstituto per lo Studio dei Materiali NanostrutturatiBolognaItaly
| | - Marco Brucale
- Consiglio Nazionale delle RicercheIstituto per lo Studio dei Materiali NanostrutturatiBolognaItaly
- Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande InterfaseFirenzeItaly
| | - Roberto Frigerio
- Consiglio Nazionale delle RicercheIstituto di Scienze e Tecnologie Chimiche “Giulio Natta”MilanItaly
- Dipartimento di Medicina Molecolare e TraslazionaleUniversità degli Studi di BresciaBresciaItaly
| | - Jacopo Cardellini
- Dipartimento di Chimica “Ugo Schiff”Università degli Studi di FirenzeFirenzeItaly
| | - Angelo Musicò
- Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande InterfaseFirenzeItaly
- Consiglio Nazionale delle RicercheIstituto di Scienze e Tecnologie Chimiche “Giulio Natta”MilanItaly
- Dipartimento di Medicina Molecolare e TraslazionaleUniversità degli Studi di BresciaBresciaItaly
| | - Miriam Romano
- Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande InterfaseFirenzeItaly
- Dipartimento di Medicina Molecolare e TraslazionaleUniversità degli Studi di BresciaBresciaItaly
| | - Andrea Zendrini
- Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande InterfaseFirenzeItaly
- Dipartimento di Medicina Molecolare e TraslazionaleUniversità degli Studi di BresciaBresciaItaly
| | - Laura Polito
- Consiglio Nazionale delle RicercheIstituto di Scienze e Tecnologie Chimiche “Giulio Natta”MilanItaly
| | - Greta Bergamaschi
- Consiglio Nazionale delle RicercheIstituto di Scienze e Tecnologie Chimiche “Giulio Natta”MilanItaly
| | - Alessandro Gori
- Consiglio Nazionale delle RicercheIstituto di Scienze e Tecnologie Chimiche “Giulio Natta”MilanItaly
| | - Costanza Montis
- Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande InterfaseFirenzeItaly
- Dipartimento di Chimica “Ugo Schiff”Università degli Studi di FirenzeFirenzeItaly
| | - Stefano Panella
- Istituto Cardiocentro TicinoEnte Ospedaliero CantonaleLuganoSwitzerland
| | - Lucio Barile
- Istituto Cardiocentro TicinoEnte Ospedaliero CantonaleLuganoSwitzerland
| | - Debora Berti
- Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande InterfaseFirenzeItaly
- Dipartimento di Chimica “Ugo Schiff”Università degli Studi di FirenzeFirenzeItaly
| | - Annalisa Radeghieri
- Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande InterfaseFirenzeItaly
- Dipartimento di Medicina Molecolare e TraslazionaleUniversità degli Studi di BresciaBresciaItaly
| | - Paolo Bergese
- Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande InterfaseFirenzeItaly
- Dipartimento di Medicina Molecolare e TraslazionaleUniversità degli Studi di BresciaBresciaItaly
- Consiglio Nazionale delle Ricerche, Istituto per la Ricerca e l'innovazione BiomedicaPalermoItaly
| | - Marina Cretich
- Consiglio Nazionale delle RicercheIstituto di Scienze e Tecnologie Chimiche “Giulio Natta”MilanItaly
| | - Francesco Valle
- Consiglio Nazionale delle RicercheIstituto per lo Studio dei Materiali NanostrutturatiBolognaItaly
- Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande InterfaseFirenzeItaly
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Kilasoniya A, Garaeva L, Shtam T, Spitsyna A, Putevich E, Moreno-Chamba B, Salazar-Bermeo J, Komarova E, Malek A, Valero M, Saura D. Potential of Plant Exosome Vesicles from Grapefruit ( Citrus × paradisi) and Tomato ( Solanum lycopersicum) Juices as Functional Ingredients and Targeted Drug Delivery Vehicles. Antioxidants (Basel) 2023; 12:antiox12040943. [PMID: 37107317 PMCID: PMC10135875 DOI: 10.3390/antiox12040943] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 04/11/2023] [Accepted: 04/14/2023] [Indexed: 04/29/2023] Open
Abstract
Plant-derived extracellular vesicles (PEVs) have gained attention as promising bioactive nutraceutical molecules; their presence in common fruit juices has increased their significance because human interaction is inevitable. The goal of this study was to evaluate the potential of PEVs derived from grapefruit and tomato juices as functional ingredients, antioxidant compounds, and delivery vehicles. PEVs were isolated using differential ultracentrifugation and were found to be similar in size and morphology to mammalian exosomes. The yield of grapefruit exosome-like vesicles (GEVs) was higher than that of tomato exosome-like vesicles (TEVs), despite the latter having larger vesicle sizes. Furthermore, the antioxidant activity of GEVs and TEVs was found to be low in comparison to their juice sources, indicating a limited contribution of PEVs to the juice. GEVs showed a higher efficiency in being loaded with the heat shock protein 70 (HSP70) than TEVs, as well as a higher efficiency than TEV and PEV-free HSP70 in delivering HSP70 to glioma cells. Overall, our results revealed that GEVs present a higher potential as functional ingredients present in juice and that they exert the potential to deliver functional molecules to human cells. Although PEVs showed low antioxidant activity, their role in oxidative response in cells should be further addressed.
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Affiliation(s)
- Alina Kilasoniya
- Cátedra UCAM-DORSIA, Universidad Católica de Murcia, Campus de Los Jerónimos, 30107 Murcia, Spain
| | - Luiza Garaeva
- Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Centre «Kurchatov Institute», Orlova Roscha 1, 188300 Gatchina, Russia
| | - Tatiana Shtam
- Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Centre «Kurchatov Institute», Orlova Roscha 1, 188300 Gatchina, Russia
- Institute of Cytology of Russian Academy of Sciences, Tikhoretsky Ave. 4, 194064 St. Petersburg, Russia
| | - Anastasiia Spitsyna
- Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Centre «Kurchatov Institute», Orlova Roscha 1, 188300 Gatchina, Russia
| | - Elena Putevich
- Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Centre «Kurchatov Institute», Orlova Roscha 1, 188300 Gatchina, Russia
| | - Bryan Moreno-Chamba
- Instituto de Investigación, Desarrollo e Innovación en Biotecnología Sanitaria de Elche (IDiBE), Universidad Miguel Hernández de Elche, 03202 Alicante, Spain
| | - Julio Salazar-Bermeo
- Instituto de Investigación, Desarrollo e Innovación en Biotecnología Sanitaria de Elche (IDiBE), Universidad Miguel Hernández de Elche, 03202 Alicante, Spain
| | - Elena Komarova
- Institute of Cytology of Russian Academy of Sciences, Tikhoretsky Ave. 4, 194064 St. Petersburg, Russia
| | - Anastasia Malek
- Subcellular Technology Laboratory, Department of Hematology and Chemotherapy and Department of Radionuclide Diagnostics, N.N. Petrov National Medical Research Center of Oncology, 197758 St. Petersburg, Russia
| | - Manuel Valero
- Instituto de Investigación, Desarrollo e Innovación en Biotecnología Sanitaria de Elche (IDiBE), Universidad Miguel Hernández de Elche, 03202 Alicante, Spain
| | - Domingo Saura
- Instituto de Investigación, Desarrollo e Innovación en Biotecnología Sanitaria de Elche (IDiBE), Universidad Miguel Hernández de Elche, 03202 Alicante, Spain
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Chen M, Lin S, Zhou C, Cui D, Haick H, Tang N. From Conventional to Microfluidic: Progress in Extracellular Vesicle Separation and Individual Characterization. Adv Healthc Mater 2023; 12:e2202437. [PMID: 36541411 DOI: 10.1002/adhm.202202437] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 12/07/2022] [Indexed: 12/24/2022]
Abstract
Extracellular vesicles (EVs) are nanoscale membrane vesicles, which contain a wide variety of cargo such as proteins, miRNAs, and lipids. A growing body of evidence suggests that EVs are promising biomarkers for disease diagnosis and therapeutic strategies. Although the excellent clinical value, their use in personalized healthcare practice is not yet feasible due to their highly heterogeneous nature. Taking the difficulty of isolation and the small size of EVs into account, the characterization of EVs at a single-particle level is both imperative and challenging. In a bid to address this critical point, more research has been directed into a microfluidic platform because of its inherent advantages in sensitivity, specificity, and throughput. This review discusses the biogenesis and heterogeneity of EVs and takes a broad view of state-of-the-art advances in microfluidics-based EV research, including not only EV separation, but also the single EV characterization of biophysical detection and biochemical analysis. To highlight the advantages of microfluidic techniques, conventional technologies are included for comparison. The current status of artificial intelligence (AI) for single EV characterization is then presented. Furthermore, the challenges and prospects of microfluidics and its combination with AI applications in single EV characterization are also discussed. In the foreseeable future, recent breakthroughs in microfluidic platforms are expected to pave the way for single EV analysis and improve applications for precision medicine.
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Affiliation(s)
- Mingrui Chen
- School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Shujing Lin
- School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Cheng Zhou
- School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Daxiang Cui
- School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
| | - Hossam Haick
- Department of Chemical Engineering and Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa, 3200003, Israel
| | - Ning Tang
- School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
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Unveiling the Native Morphology of Extracellular Vesicles from Human Cerebrospinal Fluid by Atomic Force and Cryogenic Electron Microscopy. Biomedicines 2022; 10:biomedicines10061251. [PMID: 35740275 PMCID: PMC9220600 DOI: 10.3390/biomedicines10061251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/19/2022] [Accepted: 05/25/2022] [Indexed: 12/10/2022] Open
Abstract
Extracellular vesicles (EVs) are membranous structures in biofluids with enormous diagnostic/prognostic potential for application in liquid biopsies. Any such downstream application requires a detailed characterization of EV concentration, size and morphology. This study aimed to observe the native morphology of EVs in human cerebrospinal fluid after traumatic brain injury. Therefore, they were separated by gravity-driven size-exclusion chromatography (SEC) and investigated by atomic force microscopy (AFM) in liquid and cryogenic transmission electron microscopy (cryo-TEM). The enrichment of EVs in early SEC fractions was confirmed by immunoblot for transmembrane proteins CD9 and CD81. These fractions were then pooled, and the concentration and particle size distribution were determined by Tunable Resistive Pulse Sensing (around 1010 particles/mL, mode 100 nm) and Nanoparticle Tracking Analysis (around 109 particles/mL, mode 150 nm). Liquid AFM and cryo-TEM investigations showed mode sizes of about 60 and 90 nm, respectively, and various morphology features. AFM revealed round, concave, multilobed EV structures; and cryo-TEM identified single, double and multi-membrane EVs. By combining AFM for the surface morphology investigation and cryo-TEM for internal structure differentiation, EV morphological subpopulations in cerebrospinal fluid could be identified. These subpopulations should be further investigated because they could have different biological functions.
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