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Decrease in selenium status in relation to coal dust exposure

M P Oryszczyn1, J Godin, C Frette

  • 1INSERM Unit 169, Villejuif, France.

American Journal of Industrial Medicine
|September 1, 1996
PubMed
Summary
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Selenium (Se) plasma levels were found to be lower in coal miners with higher coal dust exposure. This association persisted even after accounting for age and tobacco use, indicating a potential health risk.

Area of Science:

  • Occupational Health
  • Environmental Toxicology
  • Biochemistry

Background:

  • Coal mining involves significant exposure to airborne particulates.
  • Selenium is an essential trace element with antioxidant properties.
  • Factors like age and lifestyle can influence selenium levels.

Purpose of the Study:

  • To investigate the relationship between coal dust exposure and plasma selenium levels in coal miners.
  • To determine if age, alcohol, or tobacco consumption modify this relationship.

Main Methods:

  • Plasma selenium levels were measured in 222 coal miners.
  • Exposure to coal dust was categorized (long-term, current, never/slight).
  • Statistical analysis adjusted for age, alcohol, and tobacco consumption.

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Main Results:

  • Selenium levels significantly decreased with age and current tobacco consumption in miners aged 34-50.
  • Miners with both long-term and current coal dust exposure had the lowest selenium levels (60.2 ng/ml).
  • The association between coal dust exposure and lower selenium remained significant after adjustments.

Conclusions:

  • Occupational exposure to coal dust is associated with reduced plasma selenium levels in miners.
  • Age and smoking are also significant factors influencing selenium levels.
  • Further research into selenium supplementation or protective measures for miners may be warranted.