Altered synaptic plasticity of the longitudinal dentate gyrus network in noise-induced anxiety

Sojeong Pak, Gona Choi, Jaydeep Roy, Chi Him Poon, Jinho Lee, Dajin Cho, Minseok Lee, Lee Wei Lim, Shaowen Bao, Sunggu Yang, Sungchil Yang

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Anxiety is characteristic comorbidity of noise-induced hearing loss (NIHL), which causes physiological changes within the dentate gyrus (DG), a subfield of the hippocampus that modulates anxiety. However, which DG circuit underlies hearing loss-induced anxiety remains unknown. We utilize an NIHL mouse model to investigate short- and long-term synaptic plasticity in DG networks. The recently discovered longitudinal DG-DG network is a collateral of DG neurons synaptically connected with neighboring DG neurons and displays robust synaptic efficacy and plasticity. Furthermore, animals with NIHL demonstrate increased anxiety-like behaviors similar to a response to chronic restraint stress. These behaviors are concurrent with enhanced synaptic responsiveness and suppressed short- and long-term synaptic plasticity in the longitudinal DG-DG network but not in the transverse DG-CA3 connection. These findings suggest that DG-related anxiety is typified by synaptic alteration in the longitudinal DG-DG network.

Original languageEnglish (US)
Article number104364
JournaliScience
Volume25
Issue number6
DOIs
StatePublished - Jun 17 2022

Keywords

  • Behavioral neuroscience
  • Biological sciences
  • Neuroscience

ASJC Scopus subject areas

  • General

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