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Subclinical interstitial lung damage in workers exposed to indium compounds.
Sungyeul Choi, Yong-Lim Won, Dohyung Kim
1Occupational Safety and Health Research Institute, Korea Occupational Safety and Health Agency, Incheon, Republic of Korea. toxneuro@kosha.net.
Annals of Occupational and Environmental Medicine
|January 30, 2014
Summary
Indium compound exposure may be linked to interstitial lung damage in Korean factory workers. Elevated serum markers like KL-6 suggest a dose-response relationship, warranting further investigation and risk communication.
Area of Science:
- Occupational Health
- Pulmonology
- Toxicology
Background:
- Indium tin oxide (ITO) is widely used in manufacturing, leading to potential occupational exposure.
- Workers in ITO production and reclamation facilities face risks of inhaling indium compounds.
- Previous studies have indicated potential lung damage from indium exposure.
Purpose of the Study:
- To investigate the relationship between indium compound exposure and interstitial lung damage.
- To assess serum biomarkers (indium, KL-6, SP-D) in exposed workers.
- To identify potential dose-response trends in relation to lung health.
Main Methods:
- Study conducted in Korea involving 78 workers with elevated serum indium or KL-6 levels.
- 34 workers underwent chest high-resolution computed tomography (HRCT) for interstitial lung assessment.
- Statistical analysis was performed on serum biomarker levels and HRCT findings.
Main Results:
- Serum indium, KL-6, and SP-D geometric means were 10.9 μg/L, 859.0 U/mL, and 179.27 ng/mL, respectively.
- HRCT revealed intralobular interstitial thickening in 9 workers.
- A significant dose-response trend was observed for blood KL-6 levels; workers with indium ≥50 μg/L had elevated KL-6.
Conclusions:
- Interstitial lung changes are suggested in workers with indium exposure.
- Further research is needed to fully understand indium-induced lung damage.
- Communicating health risks to workers and employers is crucial for prevention.
