Nanoparticle Toxicity and Pulmonary Health Effects

Engineered nanoparticles (NPs), defined by dimensions below 100 nanometres, offer exceptional opportunities in fields ranging from targeted drug delivery to advanced manufacturing. Their small size and large surface area, however, also facilitate deep lung penetration and interactions with pulmonary cells. Once inhaled, NPs may deposit in bronchial or alveolar regions, where they can provoke oxidative stress, inflammation and genotoxic responses in epithelial cells and macrophages. Factors such as particle size, shape, surface chemistry and solubility determine deposition patterns, cellular uptake, biokinetics and clearance pathways. Persistent or poorly cleared NPs can translocate beyond the respiratory tract, eliciting systemic effects. A comprehensive understanding of these interrelated phenomena is essential to assess health risks, guide safer NP design and inform regulatory frameworks for nanomaterials.

Research from Nature Portfolio

Recent studies have introduced an AI-driven 3D imaging framework that combines light sheet fluorescence microscopy with deep learning to map NP deposition across bronchial and alveolar compartments in murine lungs. This approach revealed that aerosolised delivery achieves more uniform distal deposition than liquid instillation and highlighted lung tissue-resident macrophages as dynamic agents that actively patrol and redistribute NPs rather than remaining static. By providing quantitative spatial profiles of NP dosage at cellular resolution, this platform advances understanding of pulmonary delivery dynamics and immune–nanoparticle interactions, laying groundwork for optimised therapeutic strategies.

Nanoparticle Toxicity and Pulmonary Health Effects publication trend

The graph below shows the total number of articles in nanoparticle toxicity and pulmonary health effects across all publications each year (not limited to Nature Index journals).

Technical terms

Alveolar macrophages: Resident immune cells in the lung alveoli responsible for clearance of particulates and pathogens.

Biokinetics: The study of absorption, distribution, metabolism and elimination of substances within an organism.

Nanoparticle agglomeration: The process by which individual NPs cluster together, affecting their aerodynamic behaviour and cellular uptake.

Pulmonary deposition: The distribution and localisation of inhaled particles within regions of the respiratory tract.

Oxidative stress: Cellular damage resulting from an imbalance between reactive oxygen species production and antioxidant defences.

References

1. LungVis 1.0: an automatic AI-powered 3D imaging ecosystem unveils spatial profiling of nanoparticle delivery and acinar migration of lung macrophages. Nature Communications (2024).
2. Biokinetics of subacutely co-inhaled same size gold and silver nanoparticles. Particle and Fibre Toxicology (2023).
3. Impact of Intratracheal Administration of Polyethylene Glycol-Coated Silver Nanoparticles on the Heart of Normotensive and Hypertensive Mice. International Journal of Molecular Sciences (2023).
4. Aerosol Inhalation Delivery of Ag Nanoparticles in Mice: Pharmacokinetics and Antibacterial Action. Antibiotics (2023).