Mercury-selenium interaction in workers exposed to elemental mercury vapor

Area of Science:

• Environmental Health
• Toxicology
• Biochemistry

Background:

• Occupational exposure to elemental mercury (Hg) vapor is a concern.
• Understanding the relationship between mercury and selenium (Se) in exposed individuals is crucial for health assessment.

Purpose of the Study:

• To investigate the interrelationship between mercury and selenium levels in erythrocytes, plasma, and urine of workers exposed to mercury vapor.
• To determine if mercury exposure influences selenium metabolism or vice versa.

Main Methods:

• Analysis of mercury and selenium levels in erythrocytes, plasma, and urine.
• Utilized correlational and stepwise regression analyses to examine interrelationships.
• Included 25 male and 29 female workers occupationally exposed to mercury vapor.

Main Results:

• Strong intercorrelations were found between different indicators of selenium status (erythrocyte, plasma, urine).
• Similarly, indicators of mercury exposure (erythrocyte inorganic Hg, plasma Hg, urine Hg) were significantly intercorrelated.
• Plasma mercury levels were a significant predictor of erythrocyte and plasma selenium levels, suggesting mercury's influence on selenium metabolism.

Conclusions:

• Occupational exposure to mercury vapor likely impacts selenium metabolism in workers.
• Selenium status indicators were not significant determinants of mercury exposure indicators in this cohort.