Quantifying Titanium Exposure in Lung Tissues: A Novel Laser-Induced Breakdown Spectroscopy Elemental Imaging-Based...

Area of Science:

• Toxicology
• Respiratory Medicine
• Analytical Chemistry

Background:

• Occupational and environmental exposures, especially urban air pollution, are linked to pulmonary diseases.
• Current diagnostic methods for lung diseases are established, but tools for assessing elemental contamination in lung tissue are underutilized.
• Titanium (Ti) is a relevant element in occupational and environmental exposure studies.

Purpose of the Study:

• To introduce and validate a novel laser-induced breakdown spectroscopy (LIBS) framework for in situ quantification of elemental titanium (Ti) in lung tissues.
• To expand the utility of LIBS for volumetric organ analysis.
• To provide a new diagnostic tool for assessing environmental or occupational exposure levels.

Main Methods:

• Development of a novel LIBS framework for elemental quantification in biological tissues.
• Validation using animal models exposed to titanium dioxide (TiO2) P25 nanoparticles.
• Comparative analysis with established techniques like inductively coupled plasma mass spectrometry (ICP-MS).
• Application to paraffin-embedded human lung specimens.

Main Results:

• The developed LIBS method accurately quantifies elemental titanium in lung tissues.
• A novel quantitative metric demonstrated a robust correlation with elemental concentrations.
• The methodology was successfully applied to human lung specimens, showing LIBS's potential for volumetric analysis.
• Validation confirmed the reliability of the LIBS approach against ICP-MS.

Conclusions:

• The validated LIBS framework offers a promising tool for in situ elemental analysis in lung tissue.
• This methodology can significantly contribute to assessing exposure to environmental and occupational hazards.
• The study advances the fields of toxicology and respiratory medicine by providing a novel analytical approach.