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

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AX5-25<br />

Subject<br />

Hamster,<br />

Golden<br />

Rat, Wistar,<br />

female<br />

BK:W mice,<br />

male and<br />

female<br />

BK:W mice,<br />

male and<br />

female<br />

Monkey,<br />

rhesus,<br />

4 yrs<br />

Exposure<br />

Protocol<br />

100 ppm Pb(Ac) 2<br />

GD8–PND 42<br />

Table AX5-3.4 (cont’d). Summary <strong>of</strong> Key Studies on Neurobehavioral Toxicity<br />

8, 16, or 24 mg/mL Pb(Ac) 2<br />

during pregnancy, pregnancy<br />

and lactation, or lactation.<br />

0.13% Pb(Ac) 2 chronically<br />

started be<strong>for</strong>e breeding<br />

0.25% Pb(Ac) 2 chronically<br />

started be<strong>for</strong>e<br />

breeding<br />

10 mg/kg/d pulses (2) and<br />

chronic 0.7 <strong>for</strong> first yr <strong>of</strong> life<br />

Rat, SD 350 ppm Pb(Ac) 2 from birth<br />

until weaning<br />

Rat LE,<br />

PND 53<br />

300 or 600 ppm Pb(Ac) 2 during<br />

gestation and lactation or<br />

lactation only<br />

Peak Blood Pb<br />

or [Pb] Used Observed Effects Reference<br />

PND 42:<br />

10–15 µg/d<br />

PND 19–20: Pb-exposed hamsters smaller, exhibited less play fighting.<br />

PND 45: Pb-induced increase in aggression.<br />

5.7–36.6 µg/dL PND 7: dose-dependent decrease in ultrasonic vocalization. PND 14:<br />

increased vocalization, and higher activity levels.<br />

Brain and femur:<br />

18 wks:<br />

27.6 and 998<br />

34 wk: 445 and<br />

5, 364 (M)<br />

34 wk: 787 and<br />

4, 026 (F)<br />

5 wks: 55 µg/dL<br />

first yr: ~36 yr 4:<br />

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