Effect of Early Lead Exposure

By Shanida Smith, Ivanhoe Health Correspondent

AUSTIN, Texas (Ivanhoe Newswire) -- Preliminary results from a study out of the University of Texas at Austin show early lead exposure may be linked to aggressive behaviors in adulthood.

Behavioral neuroscientist Yvon Delville, Ph.D., says, "We see an enhancement of aggressive behaviors."

During development, the nervous system is vulnerable to chemical agents present in the environment. Previous studies show children exposed to lead are at risk for cognitive and emotional problems that contribute to lower IQ and antisocial behaviors. Delville says the level of exposure to lead is significant for children in urban, industrial and rural areas.

Investigators gave hamsters varying doses of lead. The goal was to determine if play-fighting evolves into adulthood any differently for animals that have been exposed to lead than those who are not. So far, they found the evolution is normal but the intensity of aggression is higher for the lead-exposed hamsters. Delville says, "They are faster and they attack more."

The next phase of the study will test the effects of lead exposure on emotional control and differences in the brain. Delville hopes these studies will provide a better understanding of risk factors and potential therapies in humans.

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SOURCE: Interview with Yvon Delville, Ph.D., April 14, 2003