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Imaging single particle profiler to study nanoscale bioparticles using conventional confocal microscopy
Science for Life Laboratory, Department of Women’s and Children’s Health, Karolinska Institutet, Solna, Sweden.
Division of Biomolecular and Cellular Medicine, Department of Laboratory Medicine, Karolinska ATMP Center, Karolinska Institutet, Huddinge, Sweden; Department of Cellular Therapy and Allogeneic Stem Cell Transplantation (CAST), Karolinska University Hospital, Huddinge, Sweden.
Division of Immunology and Respiratory Medicine, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden; Department of Clinical Immunology and Transfusion Medicine, Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden.
Division of Immunology and Respiratory Medicine, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden; Department of Clinical Immunology and Transfusion Medicine, Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden.
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2025 (English)In: Nano Letters, ISSN 1530-6984, E-ISSN 1530-6992, Vol. 25, no 6, p. 2173-2180Article in journal, Letter (Refereed) Published
Abstract [en]

Single particle profiling (SPP) is a unique methodology to study nanoscale bioparticles such as liposomes, lipid nanoparticles, extracellular vesicles, and lipoproteins in a single particle and high throughput manner. The initial version requires the single photon counting modules for data acquisition, which limits its adoptability. Here, we present imaging-based SPP (iSPP) that can be performed by imaging a spot over time in the common imaging mode with confocal detectors. We also provide user-friendly software with a graphical user interface to analyze such data and give quantitative insights on the content and properties of nanoscale bioparticles. We use iSPP to decipher lipid-protein interactions, membrane modifications by drugs, and the heterogeneity of extracellular vesicles isolated from cell lines and human urine. This easily applicable modality of the single particle profiler will facilitate nanoscale bioparticle research in laboratories with access to any confocal microscope.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2025. Vol. 25, no 6, p. 2173-2180
Keywords [en]
confocal microscopy, environmental sensitive probes, exosomes, extracellular vesicles, liposomes, membrane fluidity, single particle profiling
National Category
Clinical Medicine
Identifiers
URN: urn:nbn:se:umu:diva-234779DOI: 10.1021/acs.nanolett.4c05117ISI: 001408993300001PubMedID: 39878336Scopus ID: 2-s2.0-85216704841OAI: oai:DiVA.org:umu-234779DiVA, id: diva2:1933021
Funder
Swedish Research Council, 2020-02682Swedish Research Council, 2024-02993Swedish Research Council, 2022-01170Swedish Cancer Society, 22-2102 PjThe Cancer Research Funds of Radiumhemmet, 131082The Cancer Research Funds of Radiumhemmet, 181103EU, Horizon 2020, 101001374EU, Horizon 2020, 825828Available from: 2025-01-30 Created: 2025-01-30 Last updated: 2025-02-25Bibliographically approved

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Sherif, Amir

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