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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Developmental neurotoxicity following premating maternal exposure to hexachlorobenzene in rats.

The maternal transfer of hexachlorobenzene (HCB) may place the developing organism at risk. The present study assessed the developmental neurotoxicity of HCB using a battery of behavioral tests. Two weeks prior to breeding, maternal rats were exposed via gavage to either 10 or 100 mg HCB/kg body weight. Behaviors evaluated in pups exposed maternally to HCB included the negative geotaxic reflex on postnatal day (PND) 6, 8, and 10, olfactory discrimination (PND 9-11), and the development of exploratory behavior (PND 15-20). Significant effects in these three tests indicated hyperactivity in HCB-exposed pups. No significant effects on learning (swim T-maze) or motor activity were detected in older offspring (PND 40 and 50 respectively). The acoustic startle response (ASR) revealed apparent age-related effects of maternal HCB exposure. On PND 23 pups from the high treatment group demonstrated significantly reduced ASR amplitude, whereas these same animals, tested on PND 90 (using a reflex modification design), showed elevated ASR amplitude relative to the controls. This work demonstrates that HCB is a behavioral teratogen, and suggests that human fetuses and suckling infants may be at risk from the neurotoxic effects of HCB.[1]

References

  1. Developmental neurotoxicity following premating maternal exposure to hexachlorobenzene in rats. Goldey, E.S., Taylor, D.H. Neurotoxicology and teratology. (1992) [Pubmed]
 
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