Application of BMD approach to identify thresholds of cadmium-induced renal effect among 35 to 55 year-old women in two cadmium polluted counties in China.

PLoS One

MOE Key Lab of Environment and Health, Institute of Environmental Medicine, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, China.

Published: December 2014

AI Article Synopsis

  • Cadmium (Cd) is a harmful heavy metal that can lead to kidney problems, especially affecting women.
  • Researchers investigated the safe exposure levels of Cd for Chinese women by measuring various urinary biomarkers in two different counties.
  • The study determined benchmark dose (BMD) and lower limit (BMDL) values for Cd exposure, which are similar to those found in other countries like Japan and Sweden.

Article Abstract

Background: Cadmium (Cd) is a heavy metal that can cause renal tubular dysfunction in humans. Women are among the high-risk group for Cd health effects. Determining the thresholds of Cd-induced renal effects is important. Thus, in this article, we aimed to identify the benchmark dose (BMD) and its low limit (BMDL) levels as the Cd thresholds for Chinese women.

Methods: Epidemiologic investigation was performed in county A and county B to obtain data on Cd exposure and its renal effect on respondents. Levels of Cd (UCd), β2-microglobulin (UB2M), and N-acetyl-β-D-glucosaminidase (UNAG) were measured in morning urine samples. The BMD approach was mainly performed.

Results: Results of the BMD approach were similar whether the method was conducted for the two sets of data (collected in CA and CB, respectively) separately or cooperatively. The BMD/BMDL values of UCd for all subjects were 1.07/0.44 and 2.12/0.53 µg/g cr based on UB2M and UNAG, respectively, given a predetermined BMR of 0.05.

Conclusions: The presented thresholds of Cd-induced renal effects (i.e., the BMDLs of UCd) are close to the counterpart values reported in Japan, Sweden and Belgium.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3913698PMC
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0087817PLOS

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