[Targeting and imaging of brain-specific cell migration].

Area of Science:

• Neuroscience
• Immunology
• Cell Biology

Context:

• Investigating cellular mechanisms of brain infiltration.
• Understanding the role of immune cells in neurological processes.
• Exploring non-invasive methods for tracking cell movement.

Purpose:

• To demonstrate the specific migration of microglia and bone marrow-derived progenitor cells to the brain.
• To investigate the integrity of the blood-brain barrier during cell migration.
• To validate advanced in vivo imaging techniques for observing cell trafficking.

Summary:

• Microglia and a subset of bone marrow-derived progenitor cells exhibit specific affinity and migratory activity towards the brain, seemingly without compromising the blood-brain barrier.
• High-speed laser confocal microscopy was employed for in vivo micro-imaging, visualizing flowing cells introduced into the bloodstream.
• In vivo macro-imaging using MRI with iron oxide particle cell labeling and in vivo fluorescent imaging with Qdot800-labeled cells successfully detected and confirmed this cell migration.

Impact:

• Provides novel insights into the natural trafficking of specific cell populations into the central nervous system.
• Highlights the potential of advanced in vivo imaging modalities for studying cellular dynamics across the blood-brain barrier.
• Opens avenues for therapeutic strategies involving targeted cell delivery or modulation of immune cell migration in neurological diseases.