Selenium in human tissues from New Zealand

Area of Science:

• Environmental Science
• Human Physiology
• Toxicology

Background:

• Selenium is an essential trace element crucial for human health.
• Geographical variations in soil selenium content can influence human selenium status.
• Understanding regional selenium levels is important for public health assessments.

Purpose of the Study:

• To determine selenium concentrations in various human tissues from New Zealand residents.
• To compare these concentrations with those found in selenium-adequate and other low-selenium areas.
• To assess the selenium status of the New Zealand population based on tissue analysis.

Main Methods:

• Autopsy tissue samples (liver, kidney cortex, skeletal muscle, heart, lung, spleen) were collected from 45 New Zealand residents (4 months to 74 years).
• Liver and brain samples were also obtained from 16 fetuses (27-42 weeks gestational age).
• Selenium concentrations were measured using appropriate analytical techniques.

Main Results:

• Selenium concentrations in most tissues were comparable to those reported in other low-selenium regions.
• Kidney cortex exhibited notably high selenium levels.
• Overall selenium levels were lower than those typically found in selenium-adequate geographical areas.

Conclusions:

• The study indicates a generally low selenium status in the New Zealand population, consistent with other low-selenium regions.
• High selenium levels in the kidney cortex warrant further investigation.
• These findings contribute to the understanding of regional trace element distribution and human health implications.