Johan Yi, Suyeon Kim, Chungmin Han and Jaesung Park
{"title":"通过单个囊泡分析评估细胞外囊泡聚集情况","authors":"Johan Yi, Suyeon Kim, Chungmin Han and Jaesung Park","doi":"10.1039/D4AN01112K","DOIUrl":null,"url":null,"abstract":"<p >Extracellular vesicles (EVs) play pivotal roles in intercellular communication and are implicated in numerous physiological and pathological processes. Here, we introduce a quantitative technique using total internal reflection fluorescence microscopy (TIRFm)-based single vesicle analysis (SVA) to assess EV aggregation, a critical factor influencing their biological functionality. Employing two-colored fluorescent recombinant EV mixtures, this method enables precise discrimination between aggregated and non-aggregated EVs. It allows for calculating an aggregation ratio from the colocalization of fluorescence signals. We evaluate the impact of isolation methods, storage conditions, and biochemical environments on EV aggregation, including salt and pH variations and the presence of antibodies. Additionally, we quantitatively assess the efficacy of aggregation removal techniques, revealing significant variability in removal methods depending on the type of aggregates. This analytical approach is expected to enhance our understanding of EV aggregation dynamics and set a new standard for the characterization and functional analysis of EVs.</p>","PeriodicalId":63,"journal":{"name":"Analyst","volume":" 23","pages":" 5638-5648"},"PeriodicalIF":3.6000,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Evaluation of extracellular vesicle aggregation by single vesicle analysis†\",\"authors\":\"Johan Yi, Suyeon Kim, Chungmin Han and Jaesung Park\",\"doi\":\"10.1039/D4AN01112K\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Extracellular vesicles (EVs) play pivotal roles in intercellular communication and are implicated in numerous physiological and pathological processes. Here, we introduce a quantitative technique using total internal reflection fluorescence microscopy (TIRFm)-based single vesicle analysis (SVA) to assess EV aggregation, a critical factor influencing their biological functionality. Employing two-colored fluorescent recombinant EV mixtures, this method enables precise discrimination between aggregated and non-aggregated EVs. It allows for calculating an aggregation ratio from the colocalization of fluorescence signals. We evaluate the impact of isolation methods, storage conditions, and biochemical environments on EV aggregation, including salt and pH variations and the presence of antibodies. Additionally, we quantitatively assess the efficacy of aggregation removal techniques, revealing significant variability in removal methods depending on the type of aggregates. This analytical approach is expected to enhance our understanding of EV aggregation dynamics and set a new standard for the characterization and functional analysis of EVs.</p>\",\"PeriodicalId\":63,\"journal\":{\"name\":\"Analyst\",\"volume\":\" 23\",\"pages\":\" 5638-5648\"},\"PeriodicalIF\":3.6000,\"publicationDate\":\"2024-11-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Analyst\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2024/an/d4an01112k\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, ANALYTICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Analyst","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/an/d4an01112k","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
引用次数: 0
摘要
细胞外囊泡(EVs)在细胞间通信中起着关键作用,并与许多生理和病理过程有关。在这里,我们介绍了一种基于全内反射荧光显微镜(TIRFm)的单囊泡分析(SVA)定量技术,用于评估影响其生物功能的关键因素--EV聚集。该方法采用双色荧光重组 EV 混合物,可精确区分聚集和非聚集 EV。它可以通过荧光信号的共聚焦来计算聚集率。我们评估了分离方法、储存条件和生化环境对 EV 聚集的影响,包括盐和 pH 值的变化以及抗体的存在。此外,我们还定量评估了清除聚集技术的功效,发现清除方法因聚集体类型的不同而存在显著差异。这种分析方法有望增强我们对 EV 聚集动力学的理解,并为 EV 的表征和功能分析设定新的标准。
Evaluation of extracellular vesicle aggregation by single vesicle analysis†
Extracellular vesicles (EVs) play pivotal roles in intercellular communication and are implicated in numerous physiological and pathological processes. Here, we introduce a quantitative technique using total internal reflection fluorescence microscopy (TIRFm)-based single vesicle analysis (SVA) to assess EV aggregation, a critical factor influencing their biological functionality. Employing two-colored fluorescent recombinant EV mixtures, this method enables precise discrimination between aggregated and non-aggregated EVs. It allows for calculating an aggregation ratio from the colocalization of fluorescence signals. We evaluate the impact of isolation methods, storage conditions, and biochemical environments on EV aggregation, including salt and pH variations and the presence of antibodies. Additionally, we quantitatively assess the efficacy of aggregation removal techniques, revealing significant variability in removal methods depending on the type of aggregates. This analytical approach is expected to enhance our understanding of EV aggregation dynamics and set a new standard for the characterization and functional analysis of EVs.