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

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AX5-84<br />

Table AX5-6.4 (cont’d). Genotoxic/Carcinogenic Effects <strong>of</strong> <strong>Lead</strong>—Genotoxicity Laboratory Animal Studies.<br />

Compound Dose and Duration Species Co-exposure Effects Reference<br />

Pb acetate 10 mg/kg given by gavage<br />

5 times a week <strong>for</strong> 4 wks.<br />

10 animals per group<br />

Chromosome Aberrations<br />

with 20 metaphases scored<br />

per animal<br />

Male Wistar rats,<br />

30 days old<br />

Cypermethrin No effects on weight gain.<br />

Pb acetate induced an increase in aneuploidy, and the percent<br />

<strong>of</strong> cells with damage, but did not increase structural damage<br />

or alterations in organ weight.<br />

Cypermethrin and Pb together increased structural<br />

aberrations that were predominately acentric fragments.<br />

However, this was compared to untreated controls and not the<br />

individual treatments. Considering the individual treatments,<br />

the two together are less than additive.<br />

Nehez et al. (2000)

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