Modified Nanoemulsions with Iron Oxide for Magnetic Resonance Imaging

Area of Science:

• Nanotechnology
• Immunology
• Biomedical Imaging

Background:

• Nanoemulsions (NEs) are nanoscale, oil-in-water emulsions used as mucosal adjuvants.
• Understanding NE uptake and distribution is crucial for optimizing nasal vaccine delivery.
• Iron oxide nanoparticles offer unique imaging capabilities for tracking materials in vivo.

Purpose of the Study:

• To develop and characterize iron oxide-modified NEs for tracking nasal uptake.
• To evaluate the in vitro and in vivo behavior of these modified NEs.

Main Methods:

• Synthesis of iron oxide nanoparticles and their incorporation into soybean oil-based NEs.
• Characterization of iron oxide-modified NEs (size, stability).
• In vitro studies using TC-1 cells and in vivo studies in mice using MR imaging and transmission electron microscopy.

Main Results:

• Iron oxide nanoparticles were successfully stabilized in NEs (521 nm mean diameter).
• Iron oxide-modified NEs were taken up by TC-1 cells and reduced MR image intensity.
• In vivo studies confirmed the detection of iron oxide-modified NEs in mouse nasal septum.

Conclusions:

• Iron oxide-modified NEs are a viable tool for studying NE uptake and distribution after nasal administration.
• This approach enables visualization and tracking of NEs in biological systems.
• The findings support the use of imaging-guided nanoparticles for pharmaceutical research.