Related Experiment Video
Updated: May 12, 2026
09:06
Labeling hESCs and hMSCs with Iron Oxide Nanoparticles for Non-Invasive in vivo Tracking with MR Imaging
Published on: March 31, 2008
Clinically viable magnetic poly(lactide-co-glycolide) particles for MRI-based cell tracking
Dorit Granot1, Michael K Nkansah, Margaret F Bennewitz
1Molecular and Cellular MRI Laboratory, Magnetic Resonance Research Center, Department of Diagnostic Radiology, Yale University School of Medicine, New Haven, Connecticut, USA.
Magnetic Resonance in Medicine
|April 10, 2013
Summary
Clinically viable magnetic nanoparticles were developed for MRI cell tracking. These particles enable sensitive detection and tracking of cells in vivo without compromising cell function or viability.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Medical Imaging
Background:
- Accurate cell tracking is crucial for understanding biological processes and disease progression.
- Magnetic Resonance Imaging (MRI) offers non-invasive visualization capabilities.
- Developing safe and effective magnetic contrast agents for cell tracking remains a challenge.
Purpose of the Study:
- To design, fabricate, and characterize clinically viable magnetic nanoparticles (MNPs) for MRI-based cell tracking.
- To evaluate the safety and efficacy of these MNPs in vitro and in vivo.
Main Methods:
- Poly(lactide-co-glycolide) (PLGA) encapsulated magnetic nano and microparticles were fabricated.
- In vitro studies assessed cell viability, cellular performance, and stem cell differentiation.
- In vivo MRI experiments evaluated cell transplantation, migration, and biodegradation.
Main Results:
- Fabricated highly magnetic nano (∼100 nm) and microparticles (∼1-2 µm).
- Achieved rapid magnetic cell labeling without transfection agents, showing no effect on cell viability.
- Demonstrated uncompromised differentiation of stem cells and cytokine release from immune cells.
- MRI detected as few as 10 labeled cells in vivo and monitored endogenous cell migration.
Conclusions:
- Developed robust magnetic particles with excellent MRI properties and a benign safety profile.
- These particles show significant promise for clinical translation in MRI-based cell tracking applications.
