NR2B-containing N-methyl-D-aspartate subtype glutamate receptors regulate the acute stress effect on hippocampal long-term potentiation/long-term depression in vivo.

Meina Wang, Ya Yang, Zhifang Dong, Jun Cao, Lin Xu

Key Laboratory of Animal Models and Human Disease Mechanisms, Kunming Institute of Zoology, the Chinese Academy of Sciences, Kunming, and the 2nd Xiangya Hospital of Central South University, Changsha, Hunan, PR China.

Neuroreport 2006 Aug 21

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Behavioral stress facilitates long-term depression but impairs long-term potentiation in the hippocampus. Recent evidence in vitro demonstrates that the NR2B-containing N-methyl-D-aspartate subtype glutamate receptor antagonist Ro25-6981 prevents the behavioral stress-facilitated hippocampal long-term depression. It is, however, unknown whether Ro25-6981 influences hippocampal long-term depression and long-term potentiation induction in vivo under stressful condition. Here, we found that infusion of Ro25-6981 (2.3 microg in 6 microl, intracerebroventricular for 10 min) 30 min before low-frequency stimulation prevented the facilitation of hippocampal long-term depression by acute stress in anesthetized adult rats. Moreover, infusion of Ro25-6981 30 min before high-frequency stimulation reversed stress-impaired hippocampal long-term potentiation. These results suggest that the NR2B-containing N-methyl-D-aspartate subtype glutamate receptors are crucial for the effects of behavioral stress on hippocampal long-term depression and long-term potentiation in vivo.

Citation

Meina Wang, Ya Yang, Zhifang Dong, Jun Cao, Lin Xu. NR2B-containing N-methyl-D-aspartate subtype glutamate receptors regulate the acute stress effect on hippocampal long-term potentiation/long-term depression in vivo. Neuroreport. 2006 Aug 21;17(12):1343-6