Critical Reviews™ in Neurobiology

ISSN for PRINT: 0892-0915

For Online Access

Best Paper Award Selection - Editorial Board Site

2006, Volume18

Issue 1-2

209 pages

Issue price - $338.00

Jean-Marie Godfraind
Département de Physiologie et Pharmacologie, Systéme Nerveux, UCL 5449, Faculté de Médecine, UCL-Bruxelles, B-1200 Brussels, Belgium

Yao-Zhong Xu
School of Life Sciences, University of Science and Technology of China, Hefei Anhui 230026, The People's Republic of China

In keeping with previous observations in the CA1 and the somatosensory neocortex of the brain of rat, 20-min applications of 2-deoxy-D-glucose (2DG; 10 mM, replacing glucose) induced a long-term potentiation (LTP)-like enhancement of field excitatory synaptic potentials (fEPSPs) in the dentate region of hippocampal slices. The effects of 2DG were not identical at synapses of medial and lateral perforant paths (MPP and LPP). At MPP synapses, there was no post-2DG early depression of fEPSPs and the potentiation reached +78.6 ± 5.7 % (± standard error of the mean) 40 min after the return to glucose. In the presence of 50 μM D-amino-phosphono valerate (APV; an N-methyl-D-aspartate [NMDA] receptor antagonist), a marked post-2DG depression appeared and the subsequent LTP was reduced to +34.7 ± 2.8 % (for both 2DG- and APV-treatment P<0.001 by ANOVA-2W). At LPP synapses, even under control conditions, there was a sharp post-2DG depression followed by LTP (+62.2 ± 5.7 %) and APV had little effect on either the post-2DG depression or LTP, reducing the latter by only 24 % [the 2DG treatment was very significant (P<0.001) but not the APV treatment]. Thus, 2DG evokes both NMDAR-dependent and -independent components of LTP in the perforant pathways. In view of these findings, the consumption of 2DG could have significant effects on synaptic plasticity and cognitive function.

Download article, 37-48 pages

Article price - $35.00

<< Previous article   Next article >>