Super-resolution microscopy reveals glioma cell footprints and exosome deposits
Gliomas are aggressive brain tumors whose infiltrative growth is mediated by intercellular crosstalk. Exosomes, small extracellular vesicles, play a key role in cell–cell communication but are difficult to visualize using conventional microscopy. Performing immunostaining for CD63, a known exosome m...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2025-12-01
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| Series: | Cell Adhesion & Migration |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/19336918.2025.2534759 |
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| Summary: | Gliomas are aggressive brain tumors whose infiltrative growth is mediated by intercellular crosstalk. Exosomes, small extracellular vesicles, play a key role in cell–cell communication but are difficult to visualize using conventional microscopy. Performing immunostaining for CD63, a known exosome marker, and using STED microscopy, we demonstrate exosome secretion in primary glioma cells. Applying mathematical deconvolution, we enhance the contrast and resolution for in-depth analysis of STED images. We identify CD63-positive cellular footprints and exosome deposits in the extracellular space. Quantitative analysis shows CD63-positive exosomes ranging 36.55-157.06 nm in size. CD63/actin co-staining demonstrates different actin polymerization states associated with exosomes. In conclusion, STED microscopy coupled with immunostaining allows exosome primary characterization at the single-vesicle level in the cellular spatial context. |
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| ISSN: | 1933-6918 1933-6926 |