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Air Quality Criteria for Lead Volume II of II - (NEPIS)(EPA) - US ...

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AX6-94<br />

Table AX6-4.2 (cont’d). Renal Effects <strong>of</strong> <strong>Lead</strong> in the Occupational Population<br />

Reference, Study<br />

Location, and<br />

Period Study Description Pb Measurement Findings, Interpretation<br />

Asia (cont’d)<br />

Huang et al. (1988)<br />

Beijing, China<br />

Study date not<br />

provided<br />

Jung et al. (1998)<br />

Korea<br />

Study date not<br />

provided<br />

Konishi, et al. (1994)<br />

Study location<br />

not provided;<br />

research team from<br />

Japan<br />

1991<br />

40 Pb workers (4 women).<br />

Control group not described.<br />

Renal outcomes = serum beta-2-microglobulin and urinary<br />

beta-2-microglobulin, total protein, IgG.<br />

75 randomly selected male Pb workers.<br />

64 male <strong>of</strong>fice workers (controls).<br />

Renal outcomes = BUN, serum creatinine, uric acid and<br />

urinary NAG, albumin, α1 microglobulin and ∃ 2<br />

microglobulin.<br />

99 male Pb workers, including 16 <strong>of</strong>fice workers to serve<br />

at controls.<br />

renal outcomes = fractional clearances <strong>of</strong> α1 microglobulin<br />

and ∃2 microglobulin (utilizing serum and urinary levels <strong>of</strong><br />

both biomarkers), BUN, serum creatinine, uric acid and<br />

urinary NAG.<br />

Geometric mean blood Pb<br />

40 µg/dL<br />

Mean blood Pb<br />

Means ranged from 24.3 to<br />

74.6 µg/dL (workers)<br />

7.9 µg/dL (controls)<br />

Other Pb measures included<br />

zinc protoporphyrin,<br />

δ-aminolevulinic acid activity<br />

and urinary Pb,<br />

coproporphyrin, and<br />

δ-aminolevulinic acid.<br />

Median blood Pb<br />

Range from 7.9 µg/dL in<br />

controls to 76.2 µg/dL in<br />

Category V<br />

Increased urinary ∃ 2 microglobulin in workers<br />

compared to controls.<br />

Multiple limitations including lack <strong>of</strong> in<strong>for</strong>mation on<br />

control group, data analysis.<br />

Blood Pb, zinc protoporphyrin, and urinary δaminolevulinic<br />

acid significantly correlated with BUN,<br />

NAG, and α1 microglobulin (appears to be combined<br />

group analysis).<br />

Limitation = statistical analysis - lack <strong>of</strong> adjustment.<br />

Urinary NAG, α1 microglobulin and fractional<br />

clearance <strong>of</strong> α 1 microglobulin increased with higher<br />

blood Pb category. Spearman rank correlation between<br />

fractional clearance <strong>of</strong> α 1 microglobulin and blood Pb<br />

was significant. This relation also assessed by multiple<br />

linear regression with adjustment <strong>for</strong> age; both<br />

independent variables were significantly associated<br />

with the fractional clearance <strong>of</strong> α1 microglobulin.<br />

Limitation = statistical analysis - lack <strong>of</strong> adjustment.

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