Application of benchmark dose (BMD) in estimating biological exposure limit (BEL) to cadmium / 生物医学与环境科学(英文)
Biomedical and Environmental Sciences
;
(12): 460-464, 2007.
Article
in English
| WPRIM
| ID: wpr-249825
ABSTRACT
<p><b>OBJECTIVE</b>To estimate the biological exposure limit (BEL) using benchmark dose (BMD) based on two sets of data from occupational epidemiology.</p><p><b>METHODS</b>Cadmium-exposed workers were selected from a cadmium smelting factory and a zinc product factory. Doctors, nurses or shop assistants living in the same area served as a control group. Urinary cadmium (UCd) was used as an exposure biomarker and urinary beta2-microgloburin (B2M), N-acetyl-13-D-glucosaminidase (NAG) and albumin (ALB) as effect biomarkers. All urine parameters were adjusted by urinary creatinine. Software of BMDS (Version 1.3.2, EPA.U.S.A) was used to calculate BMD.</p><p><b>RESULTS</b>The cut-off point (abnormal values) was determined based on the upper limit of 95% of effect biomarkers in control group. There was a significant dose response relationship between the effect biomarkers (urinary B2M, NAG; and ALB) and exposure biomarker (UCd). BEL value was 5 microg/g creatinine for UB2M as an effect biomarker, consistent with the recommendation of WHO. BEL could be estimated by using the method of BMD. BEL value was 3 microg/g creatinine for UNAG as an effect biomarker. The more sensitive the used biomarker is, the more occupational population will be protected.</p><p><b>CONCLUSION</b>BMD can be used in estimating the biological exposure limit (BEL). UNAG is a sensitive biomarker for estimating BEL after cadmium exposure.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Acetylglucosaminidase
/
Spectrophotometry, Atomic
/
Urine
/
Cadmium
/
Biomarkers
/
Occupational Exposure
/
Beta 2-Microglobulin
/
Albuminuria
/
Dose-Response Relationship, Drug
/
Toxicity
Limits:
Female
/
Humans
/
Male
Language:
English
Journal:
Biomedical and Environmental Sciences
Year:
2007
Type:
Article
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