Related Experiment Videos
Magnetically labeled cells can be detected by MR imaging
R Weissleder1, H C Cheng, A Bogdanova
1Department of Radiology, Massachusetts General Hospital, Boston, USA.
Journal of Magnetic Resonance Imaging : JMRI
|January 1, 1997
Summary
Magnetic iron oxide nanoparticles (MION) can be used to label various cells for MR imaging. This technique allows for sensitive detection of labeled cells, enabling in vivo cell tracking applications.
Area of Science:
- Biomedical Imaging
- Nanotechnology
- Cell Biology
Background:
- Magnetic labeling of cells is crucial for tracking their in vivo behavior.
- Monocrystalline iron oxide (MION) nanoparticles offer potential for cell labeling due to their magnetic properties.
Purpose of the Study:
- To assess the feasibility of using MION for magnetic resonance (MR) imaging of labeled cells.
- To evaluate the detectability and signal characteristics of MION within different cell types.
Main Methods:
- Various cell lines were labeled with MION particles through simple incubation.
- Labeled cell phantoms were imaged using MR at 1.5 T with T1- and T2-weighted pulse sequences.
- MION uptake and MR signal changes were quantified.
Main Results:
- MION uptake varied significantly between tumor cells and phagocytes.
- Cell-internalized MION produced detectable MR signal changes, comparable to free MION but at lower doses.
- The detection limit was approximately 2 ng Fe, corresponding to 10^5 tumor cells or 5x10^3 macrophages.
Conclusions:
- Efficient intracellular labeling of diverse cell types with MION is achievable via simple incubation.
- MION-based cell labeling is a sensitive method for MR imaging.
- This approach holds promise for in vivo cell tracking applications.