Nanodelivery vehicles induce remote biochemical changes in vivo

Area of Science:

• Nanomedicine and Drug Delivery
• Biomedical Imaging
• Pharmacokinetics

Background:

• Nanomaterial-based platforms offer potential for controlled therapeutic delivery.
• Understanding nanomaterial biodistribution and site-specific biochemical effects is crucial for efficacy and safety.
• Current imaging methods may not fully capture the spatial relationship between nanomaterial accumulation and biological responses.

Purpose of the Study:

• To evaluate the in vivo distribution and biochemical effects of anti-TNF-α nanoparticle stabilized capsules (NPSCs) using a dual-mode mass spectrometry imaging (MSI) method.
• To spatially correlate NPSC accumulation sites with observed biochemical changes.
• To identify potential off-target effects of the nanomaterial delivery system.

Main Methods:

• Utilized a dual-mode mass spectrometry imaging (MSI) approach.
• Assessed the distribution of anti-TNF-α nanoparticle stabilized capsules (NPSCs) in mice.
• Analyzed site-specific biochemical changes, including lipid biomarker levels, using matrix-assisted laser desorption/ionization (MALDI) MSI.

Main Results:

• Significant biochemical changes, particularly in TNF-α-specific lipid biomarkers, were observed in immune cell-rich regions.
• The NPSCs predominantly accumulated in spatially isolated filtration regions, distinct from the areas of biochemical alteration.
• MALDI-MSI identified biochemical changes associated with the nanomaterials themselves, suggesting potential off-target effects.

Conclusions:

• The study highlights a spatial disconnect between NPSC accumulation and anticipated therapeutic biochemical effects in vivo.
• MSI provides critical spatial context for evaluating both intended and unintended outcomes of complex nanotherapeutic delivery systems.
• This approach demonstrates the power of MSI to comprehensively assess nanomaterial biodistribution and biological impact.