Inhibition of progenitor cell proliferation in the dentate gyrus of rats following post-weaning lead exposure

  • Schneider J
  • Anderson D
  • Wade T
 et al. 
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Abstract

Although lead is a potent developmental neurotoxin, the effects of postnatal lead exposure on progenitor cell proliferation in the hippocampus has not been examined. Postnatal day 25 rats were fed a lead containing diet (1500 ppm lead acetate) for 30-35 days and administered bromodeoxyuridine (BrdU, 50 mg/kg, i.p.) during the last 5 days of lead exposure. Animals were killed 24 h after the last BrdU injection. Proliferation of new cells in the subgranular zone and dentate gyrus was significantly decreased in lead-exposed rats compared to control animals that ate a similar diet devoid of lead. These results suggest that postnatal lead exposure can have significant deleterious effects on progenitor cell proliferation and thus the structure and function of the hippocampus. © 2004 Elsevier Inc. All rights reserved.

Author-supplied keywords

  • Dentate gyrus
  • Hippocampus
  • Lead
  • Progenitor cells

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