Imaging breast cancer using a dual-ligand nanochain particle

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Tumor microenvironments are heterogeneous and dynamic, with variable receptor expression.
• Conventional nanoparticles often rely on single receptor targeting, limiting efficacy.
• Targeting tumor endothelium offers an alternative strategy for nanoparticle delivery.

Purpose of the Study:

• To evaluate the in vivo performance of multi-component iron oxide nanochains for targeting and imaging aggressive breast tumors.
• To investigate the impact of dual-ligand functionalization on nanoparticle tumor deposition and MRI signal generation.

Main Methods:

• Synthesis of multi-component iron oxide nanochains functionalized with dual ligands (anti-P-selectin and anti-fibronectin).
• Evaluation of in vivo tumor targeting and deposition in orthotropic mouse models of breast cancer using 7T MRI.
• Comparison of dual-ligand nanochains with single-ligand nanochains and spherical nanoparticles.

Main Results:

• Dual-ligand nanochains demonstrated improved intratumoral deposition compared to spherical nanoparticles.
• The elongated structure of nanochains contributed to enhanced vascular targeting and tumor accumulation.
• Dual-ligand nanochains provided consistent and detectable MR signals within 3 hours post-injection in two breast cancer models.

Conclusions:

• Multi-component nanochains with dual-ligand targeting offer a promising strategy for enhanced nanoparticle delivery to heterogeneous tumors.
• This approach improves diagnostic imaging capabilities through consistent MRI signal generation.
• Dual-ligand functionalization overcomes limitations of single-target strategies in dynamic tumor microenvironments.