• Fei Geng, Jie Zhang, Jian-Lin Wu, Wen-Jun Zou, Zhi-Ping Liang, Lin-Lin Bi, Ji-Hong Liu, Ying Kong, Chu-Qiang Huang, Xiao-Wen Li, Jian-Ming Yang, and Tian-Ming Gao.
• State Key Laboratory of Organ Failure Research, Key Laboratory of Psychiatric Disorders of Guangdong Province, Collaborative Innovation Center for Brain Science, Department of Neurobiology, Southern Medical University, Guangzhou 510515, China.
• Neuroscience. 2016 Aug 4; 329: 182-92.

AbstractThe bed nucleus of the stria terminalis (BNST), a nucleus defined as part of the extended amygdala, is involved in the expression of anxiety disorders. However, the regulatory mechanisms of BNST inhibitory activity that is involved in anxiety are unknown. Here, we showed that blocking neuregulin 1 (NRG1)-ErbB4 signaling in the BNST of mice, by either neutralizing endogenous NRG1 with ecto-Erbb4 or antagonizing the ErbB4 receptor with its specific inhibitor, produced anxiogenic responses. Interestingly, application of exogenous NRG1 into the BNST induced no anxiolytic effects, suggesting saturating activity of endogenous NRG1. While infusion of the GABAA receptor antagonist bicuculline into the BNST also led to anxiety-related behaviors, it did not worsen the anxiogenic effects produced by blocking NRG1-ErbB4 signaling, suggesting possible involvement of GABAergic neurotransmission. Further, in vitro electrophysiological recordings showed that BNST NRG1-ErbB4 signaling regulated the presynaptic GABA release. Together, these results suggest that NRG1-ErbB4 signaling in the BNST may play an important role in regulating anxiety-like behaviors.Copyright © 2016 IBRO. Published by Elsevier Ltd. All rights reserved.

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