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Updated: May 29, 2026

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Preparation, Administration, and Assessment of In Vivo Tissue-Specific Cellular Uptake of Fluorescent Dye-Labeled Liposomes
Published on: July 30, 2020
Cell labeling approaches for fluorescence-based in vivo flow cytometry
Costas M Pitsillides1, Judith M Runnels, Joel A Spencer
1Center for Systems Biology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA.
Summary
This study reviews methods for fluorescently labeling circulating cells for in vivo flow cytometry. These techniques enable non-invasive cell tracking in small animals, aiding cancer cell detection and immune cell quantification.
Area of Science:
- Biomedical Engineering
- Cell Biology
- Immunology
Background:
- In vivo flow cytometry offers a powerful tool for studying cell dynamics within living organisms.
- Current methods for analyzing circulating cells often require invasive procedures like blood sampling.
- Non-invasive techniques are needed for real-time monitoring of cell populations in small animal models.
Purpose of the Study:
- To provide a comprehensive overview of methods for labeling circulating cells for in vivo flow cytometry.
- To highlight the utility of these methods for cell tracking and quantification in preclinical research.
- To emphasize applications in cancer research and immune monitoring.
Main Methods:
- Overview of fluorescent labeling strategies for circulating cells.
- Discussion of techniques compatible with in vivo flow cytometry.
- Focus on methods applicable to small animal models.
Main Results:
- Established methods allow for effective in vivo labeling of circulating cells.
- These techniques facilitate non-invasive cell tracking without blood withdrawal.
- Successful detection of circulating cancer cells and quantification of immune cells demonstrated.
Conclusions:
- In vivo labeling methods are crucial for advancing cell tracking studies in small animals.
- These approaches enhance the study of circulating cancer cells and immune cell populations.
- Non-invasive fluorescence detection via in vivo flow cytometry offers significant advantages.

