Journal
NEUROBIOLOGY OF DISEASE
Volume 29, Issue 1, Pages 81-91Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.nbd.2007.08.001
Keywords
prenatal ethanol; hippocampus; AMPA receptors; synaptic transmission; aniracetam; fetal alcohol spectrum disorder; single-channel recording; whole-cell recording
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Funding
- NIAAA NIH HHS [AA11164] Funding Source: Medline
- NATIONAL INSTITUTE ON ALCOHOL ABUSE AND ALCOHOLISM [R29AA011164] Funding Source: NIH RePORTER
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Ethanol-induced damage in the developing hippocampus may result in cognitive deficits such as those observed in fetal alcohol spectrum disorder (FASD). Cognitive deficits in FASD are partially mediated by alterations in glutamatergic synaptic transmission. Recently, we reported that synaptic transmission mediated by alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptors (AMPARs) is impaired following fetal ethanol exposure. This finding led us to develop a rational approach for the treatment of alcohol-related cognitive deficits using aniracetam, an allosteric AMPAR modulator. In the present study, 28 to 34-day-old rats exposed to ethanol in utero were treated with aniracetam, and subsequently exhibited persistent improvement in mEPSC amplitude, frequency, and decay time. Furthermore, these animals expressed positive changes in synaptic single channel properties, suggesting that aniracetam ameliorates prenatal ethanol-induced deficits through modifications at the single channel level. Specifically, single channel open probability, conductance, mean open and closed times, and the number and burst duration were positively affected. Our findings emphasize the utility of compounds which slow the rate of deactivation and desensitization of AMPARs such as aniracetam. (c) 2007 Elsevier Inc. All rights reserved.
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