13.02.2013 Views

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

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

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

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

AX6-218<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 />

Asia (cont’d)<br />

Ünde er et al. (1996);<br />

Ba∏aran and Ünde er<br />

(2000)<br />

Turkey<br />

NR<br />

Yücesoy et al. (1997a)<br />

Turkey<br />

NR<br />

Yücesoy et al. (1997b)<br />

Turkey<br />

NR<br />

Design: cross-sectional cohort<br />

Subjects: adult male battery manufacture<br />

workers (n = 25), mean age, 33 yr (22–55);<br />

reference subjects (n = 25) mean age 33 yr<br />

(22–56).<br />

Outcome measures: differential blood cell<br />

counts; lymphocyte phenotype abundance;<br />

serum IgA, IgG, IgM, C3, and C4; neutrophil<br />

chemotaxis (zymosan-activated serum); latex<br />

particle-induced neutrophil phagocytic (latex<br />

particles) respiratory burst (NBT reduction)<br />

Analysis: nonparametric and parametric<br />

comparisons <strong>of</strong> outcome measures <strong>for</strong><br />

exposed and reference groups<br />

Design: cross-sectional cohort<br />

Subjects: adult male battery manufacture<br />

workers (n = 20), ages 39–48 yr; agematched<br />

reference subjects (n = 12)<br />

Outcome measures: serum cytokines IL-1∃,<br />

IL-2, TNF∀, IFN-(<br />

Analysis: parametric and nonparametric<br />

comparison <strong>of</strong> outcome measures in exposed<br />

and reference groups<br />

Design: cross-sectional cohort<br />

Subjects: adult male battery manufacture<br />

workers (n = 50), ages 39–48 yr; agematched<br />

reference subjects (n = 10)<br />

Outcome measures: lymphocyte phenotype<br />

abundance, NK cell cytotoxicity<br />

Analysis: comparison <strong>of</strong> outcome measures<br />

in exposed and reference groups<br />

Blood Pb (µg/dL) mean<br />

(SD):<br />

Pb: 74.8 (17.8)<br />

Reference: 16.7 (5.0)<br />

Blood Pb (µg/dL) mean<br />

(SE, range):<br />

Pb: 59.4 (3.2, 42–94)<br />

Reference: 4.8 (1.0, 2–15)<br />

Blood Pb (µg/dL) mean<br />

(SE, range):<br />

Pb 1 (n = 20): 59.4 (3.2,<br />

42–94)<br />

Pb 2 (n = 30): 58.4 (2.5,<br />

26–81)<br />

Reference: 4.0 (0.4, 2–6)<br />

Workers relative to reference: significantly (p < 0.05) lower serum<br />

IgG, IgM, C3, and C4 levels; lower CD4 + (“T-helper”) abundance,<br />

lower neutrophil chemotactic response; no significant difference in<br />

CD20 + (B-cell) , CD8 + (“T-suppressor”) cell, CD56 + (NK) cell<br />

abundance, or particle-induced NK cell respiratory burst.<br />

Significantly (p < 0.05) lower serum IL-1∃ and IFN-( levels in Pb<br />

workers compared to controls.<br />

Significantly (p < 0.05) lower CD20 + B-cell (%) abundance in Pb<br />

workers compared to controls, no difference in % CD4 + T-cell<br />

abundance.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!