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

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AX6-213<br />

Table AX6-8.2 (cont’d). Effects <strong>of</strong> <strong>Lead</strong> on Immune Function in Adults<br />

Reference, Study<br />

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

Europe (cont’d)<br />

Ewers et al. (1982)<br />

Germany<br />

NR<br />

Coscia et al. (1987)<br />

Italy<br />

NR<br />

Governa et al. (1987)<br />

Italy<br />

NR<br />

Design: cross-sectional cohort<br />

Subjects: adult male battery manufacture or<br />

smelter workers (n = 72), mean age 36.4 yr<br />

(16–58); reference workers (n = 53), mean<br />

age 34.8 yr (21–54)<br />

Outcome measures: serum IgA, IgG, IgM,<br />

C3; saliva IgA<br />

Analysis: parametric and nonparametric<br />

comparison <strong>of</strong> outcome measures between<br />

Pb workers and reference subjects; linear<br />

regression<br />

Design: cross-sectional cohort<br />

Subjects: adult Pb workers (n = 32, 2<br />

female), mean age 42.8 yr (SD 11.5);<br />

reference subjects (n = 25), mean age 38.6 yr<br />

(SD 13.3)<br />

Outcome measures: serum IgA, IgG, IgM,<br />

C3-C4; lymphocyte phenotype abundance<br />

Analysis: parametric comparison <strong>of</strong><br />

outcome measures between worker and<br />

reference groups<br />

Design: cross-sectional cohort<br />

Subjects: adult male battery manufacture<br />

workers (n = 9), mean age 38.4 yr (SD 13.7);<br />

age-matched reference subjects (n = 18)<br />

Outcome measures: PMN chemotaxis<br />

(zymosan-activated serum)<br />

Analysis: parametric comparison <strong>of</strong><br />

outcome measures between worker and<br />

reference groups, correlation<br />

Blood Pb (µg/dL) mean<br />

(range):<br />

Pb: 55.4.0 (18.6–85.2)<br />

Reference: 12.0 (6.6–20.8)<br />

Blood Pb (µg/dL) mean<br />

(SD):<br />

Pb: 62.3 (21.6)<br />

Reference: NR<br />

Blood Pb (µg/dL) mean<br />

(SD):<br />

Pb: 63.2 (8.2)<br />

Reference: 19.2 (6.4)<br />

Significantly (p < 0.05) lower serum IgM, lower salivary IgA in Pb<br />

workers compared to reference group.<br />

Outcomes in Pb workers that were significantly (p < 0.05) different<br />

from reference group ([+], higher, [−] lower): [−] serum IgM, [+]<br />

serum C4, [+] lymphocyte abundance (%), [−] T-cell abundance (%,<br />

number, E-rosette <strong>for</strong>ming cells), [+] B-cell abundance (%,number,<br />

immunoglobulin-bearing cells), [+] CD8 + cell abundance (number).<br />

Significantly (p < 0.05) lower PMN chemotactic response to<br />

zymosan activated serum. Effect magnitude was not correlated with<br />

blood Pb.

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