期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 842, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2022.156786
关键词
Fingernails; Trace elements; Centenarians; Environment; Biomarkers
资金
- National Natural Science Foundation of China [41601560, 41671499]
This study investigated the presence of toxic and essential trace metals in the fingernails of participants from the Hainan Province, China. The results showed high levels of essential elements Fe and Se, but a lack of toxic element Pb, in the participants. The study highlighted the influence of diet and environment in determining the presence of trace elements in nails, which varied among generations.
Bio-monitoring is commonly used to investigate trace elements, and the human nail provides an ideal medium for such testing. Toxic and essential trace metals (Cd, Pb, Fe, and Se) in the fingernails of participants from the Hainan Province were investigated. Samples included 136 centenarians and 197 offspring (101 older adult children and 96 middle-aged grandchildren) who were also sampled for comparison. As a hotspot for longevity, participants in the Hainan Province were found to have high essential nutrients of Fe and Se, and lacked the toxic element Pb. A similar trend was found for trace elements in soil and rice in the Hainan Province. The trace elements preserved in nails revealed dietary and environmental influences that varied among different generations. For the grandchildren's generation, the environment played an important role in elements in their nails, and a significant correlation and linear relationships were found, especially for Fe and Se. As the participants increased in age (from the grandchildren to the centenarians), the correlation between various elements decreased. For centenarians, the influence of beneficial or harmful properties of the elements became more important than their environment. The results also pointed to the important role of trace elements in human health, especially Fe and Se as essential elements. This study can provide information on the factors that influence the existence of trace elements in the human body and demonstrate the advantage of using the human fingernail in bio-monitoring.
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