Micro- and Nanosized Particles in Nasal Mucosa: A Pilot Study

Area of Science:

• Environmental Science
• Materials Science
• Toxicology

Background:

• Nasal mucosa is a primary site for deposition of airborne particles.
• Understanding particle accumulation in the nasal mucosa is crucial for assessing health impacts.

Purpose of the Study:

• To evaluate the presence, quantity, and distribution of micro- and nanosized particles (NPs) in nasal mucosa.
• To investigate interindividual differences in NP composition and deposition patterns.

Main Methods:

• Analysis of nasal mucosa samples from patients with chronic hypertrophic rhinosinusitis.
• Utilized scanning electron microscopy and Raman microspectroscopy for particle detection and characterization.
• Developed a novel quantification method to assess particle distribution and compared findings with occupational history.

Main Results:

• Detected NPs of diverse elemental compositions (e.g., iron, barium, titanium) in all samples.
• Observed preferential deposition in nasal regions distant from the nostrils and at varying mucosal depths.
• Identified significant interindividual variations in NP quantity and composition, potentially linked to professional exposure.

Conclusions:

• Demonstrated the feasibility of quantifying micro- and nanosized particle distribution within nasal tissue.
• Confirmed that NPs can accumulate in deeper mucosal layers.
• Suggested a correlation between NP elemental composition and occupational exposure sources.