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Updated: Jun 2, 2026
Time-lapse Imaging of Neuroblast Migration in Acute Slices of the Adult Mouse Forebrain
Published on: September 12, 2012
Serial monitoring of endogenous neuroblast migration by cellular MRI
Dorit Granot1, Dustin Scheinost, Eleni A Markakis
1Department of Diagnostic Radiology, Yale University School of Medicine, New Haven, CT, USA.
Abstract:
Endogenous neural progenitor cell migration in vivo can be monitored using MRI-based cell tracking. The current protocol is that micron sized iron oxide particles (MPIOs) are injected into the lateral ventricle proximal to the neural stem cell niche in the brain. MPIOs are endocytosed and incorporated into the neural progenitor cell population, making them visible by gradient echo MRI. Here this new method is extended to serially quantify cell migration. Initially, in vivo cell labeling methodologies were optimized, as high susceptibility effects from the MPIOs generate substantial signal loss around the injection site, masking early migratory events. Then, using improved labeling conditions, a longitudinal study was conducted over two weeks to quantify the migration of labeled progenitor cells toward the olfactory bulb (OB). By 3 days following injection, we calculated 0.26% of the volume of the OB containing labeled cells. By 8days, this volume nearly doubled to 0.49% and plateaued. These MRI results are in accordance with our data on iron quantification from the OB and with those from purely immunohistochemical studies.
Insights
This study quantifies neural progenitor cell migration using MRI-based cell tracking. Micron-sized iron oxide particles (MPIOs) enable visualization and serial measurement of cell movement toward the olfactory bulb.
Area of Science:
- Neuroscience
- Biomedical Imaging
- Cell Biology
Background:
- Monitoring endogenous neural progenitor cell migration in vivo is crucial for understanding brain development and repair.
- Current methods face challenges in serial quantification and early event detection due to signal loss from contrast agents.
Purpose of the Study:
- To extend MRI-based cell tracking for serial quantification of neural progenitor cell migration.
- To optimize in vivo cell labeling methodologies for improved detection of early migratory events.
Main Methods:
- Micron-sized iron oxide particles (MPIOs) were used for in vivo labeling of neural progenitor cells.
- Gradient echo MRI was employed to visualize MPIO-labeled cells following injection into the lateral ventricle.
- A longitudinal study quantified cell migration toward the olfactory bulb over two weeks.
Main Results:
- Optimized labeling conditions reduced signal loss around the injection site, enabling better visualization of migration.
- Quantified cell migration showed a significant increase in labeled cells within the olfactory bulb by day 3 (0.26% volume) and day 8 (0.49% volume).
- MRI findings were corroborated by iron quantification and immunohistochemical studies.
Conclusions:
- MRI-based cell tracking with MPIOs provides a robust method for serially quantifying endogenous neural progenitor cell migration in vivo.
- The optimized protocol enhances the detection of migratory events, offering valuable insights into cell movement dynamics.
- This technique holds promise for studying neurodevelopmental processes and evaluating cell-based therapies.
