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Cell Labeling and Targeting with Superparamagnetic Iron Oxide Nanoparticles
Published on: October 19, 2015
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Lysosome Enrichment Using Superparamagnetic Iron Oxide Nanoparticles (SPIONs)
Pathma Muthukottiappan1, Sara Bonini1, Dominic Winter2
1Department of Metabolism, Senescence and Autophagy, Research Center One Health Ruhr, University Alliance Ruhr, University Hospital Essen, Medical Faculty, University of Duisburg-Essen, Essen, Germany.
Methods in Molecular Biology (Clifton, N.J.)
|October 13, 2025
Summary
This study presents an optimized protocol for rapidly enriching intact lysosomes from mammalian cells using superparamagnetic iron oxide nanoparticles (SPIONs). This method offers high yield and purity for biochemical analysis without requiring tagged proteins.
Area of Science:
- Cell Biology
- Organelle Biochemistry
- Biotechnology
Background:
- Lysosomes are crucial organelles for cellular waste degradation and signaling.
- Their low abundance and dynamic nature pose challenges for biochemical characterization.
- Existing enrichment methods like density gradient centrifugation and immunoprecipitation have limitations.
Purpose of the Study:
- To describe an optimized protocol for lysosome enrichment from mammalian cells.
- To highlight the advantages of using superparamagnetic iron oxide nanoparticles (SPIONs) for this purpose.
- To provide a workflow for downstream analysis of enriched lysosomes.
Main Methods:
- Utilized superparamagnetic iron oxide nanoparticles (SPIONs) for lysosome isolation.
- Developed optimized cell culture, cell lysis, and enrichment procedures.
- Incorporated enzymatic assays and western blotting for validation.
Main Results:
- Achieved fast enrichment of intact lysosomes with high yield and purity.
- Demonstrated the effectiveness of SPIONs compared to other methods.
- Validated the protocol's applicability to common mammalian cell lines.
Conclusions:
- SPIONs offer an efficient, rapid, and protein-tag-free method for lysosome enrichment.
- The described protocol facilitates comprehensive biochemical characterization of lysosomes.
- This method is valuable for studying lysosome function and dysfunction.
