Journal
EUROPEAN JOURNAL OF PHARMACOLOGY
Volume 595, Issue 1-3, Pages 30-34Publisher
ELSEVIER
DOI: 10.1016/j.ejphar.2008.07.061
Keywords
lead; S-adenosyl-L-methionine; Morris water maze; long-term potentiation
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Funding
- The National Basic Research Program of China [2002CB512907]
- The National Nature Science Foundation of China [30630057]
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Lead (Pb2(+)) exposure in children can induce long-lasting deficits in cognitive function and has been modeled in experimental animals. Based on previous studies which demonstrated that S-adenosyl-L-methionine (SAM) is beneficial in the treatment of lead intoxication, here, we asked the question if SAM treatment could rescue the impaired cognition and synaptic plasticity induced by lead. Rats drank 1500 ppm lead acetate (PbAc) solution or distilled water throughout gestation and lactation. After weaning at postnatal day 22, one half of the control and lead-exposed male offspring were intraperitoneally injected 20 mg SAM/kg daily over a period of 20-22 days. Electrophysiological and Morris water maze test were performed at 44-54 days of age. The result showed that the impaired learning ability induced by lead could be improved significantly by SAM. Furthermore, our results revealed that long-term potentiation (LTP) of excitatory postsynaptic potential and population spike impairments induced by lead were also ameliorated by SAM treatment. (C) 2008 Elsevier B.V. All rights reserved.
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