Potential fluorescence and magnetic resonance imaging modality using mixed lanthanide oxide nanoparticles.

Area of Science:

• Biomedical imaging
• Nanotechnology
• Materials science

Background:

• Cancer imaging is crucial for diagnosis and treatment.
• Developing advanced imaging agents is essential for early detection and effective therapy.
• Dual-modality imaging offers complementary information for improved diagnostic accuracy.

Purpose of the Study:

• To develop and evaluate dual-modality (fluorescence/MR) imaging nanoparticles for cancer cell detection.
• To enhance nanoparticle solubility, stability, and biocompatibility using folic acid and G4.5 PAMAM dendrimer coatings.
• To compare the efficacy of folic acid and G4.5 PAMAM dendrimer coatings for imaging applications.

Main Methods:

• Synthesis of mixed lanthanide (Dy/Er/Tb) oxide nanoparticles.
• Coating nanoparticles with folic acid and G4.5 PAMAM dendrimer.
• Evaluation of nanoparticle performance in T2-weighted MR and fluorescence imaging of HeLa cancer cell lines and phantoms.

Main Results:

• G4.5 PAMAM dendrimer-coated nanoparticles demonstrated enhanced T2-weighted MR and fluorescence imaging compared to folic acid-coated nanoparticles.
• Imaging enhancement is attributed to the synergistic effect of fluorescence properties and higher water solubility of the PAMAM dendrimer.
• Mixed lanthanides (Dy/Tb) were effective for MR imaging, while (Er/Tb) were effective for fluorescence imaging.

Conclusions:

• G4.5 PAMAM dendrimer-coated mixed lanthanide oxide nanoparticles are promising for dual-modality cancer imaging.
• These nanoparticles show potential for both in vitro and in vivo cancer cell line detection.
• The facile synthesis and stable nature of these nanoparticles facilitate biomedical imaging applications.