HSP105 prevents depression-like behavior by increasing hippocampal brain-derived neurotrophic factor levels in mice

Naoya Hashikawa, Yuta Utaka, Takumi Ogawa, Ryo Tanoue, Yuna Morita, Sayumi Yamamoto, Satoru Yamaguchi, Masafumi Kayano, Yoshito Zamami, Narumi Hashikawa-Hobara

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

Heat shock proteins (HSPs) are stress-induced chaperones that are involved in neurological disease. Although increasingly implicated in behavioral disorders, the mechanisms of HSP action, and the relevant functional pathways, are still unclear. We examined whether oral administration of geranylgeranylacetone (GGA), a known HSP inducer, produced an antidepressant effect in a social defeat stress model of depression in mice. We also investigated the possible molecular mechanisms involved, particularly focusing on hippocampal neurogenesis and neurotrophic factor expression. In stressed mice, hippocampal HSP105 expression decreased. However, administration of GGA increased HSP105 expression and improved depression-like behavior, induced hippocampal cell proliferation, and elevated brain-derived neurotrophic factor (BDNF) levels in mouse hippocampus. Co-treatment with GGA and the BDNF receptor inhibitor K252a suppressed the antidepressant effects of GGA. HSP105 knockdown decreased BDNF mRNA levels in HT22 hippocampal cell lines and hippocampal tissue and inhibited the GGA-mediated antidepressant effect. These observations suggest that GGA administration is a therapeutic candidate for depressive diseases by increasing hippocampal BDNF levels via HSP105 expression.

Original languageEnglish
Article numbere1603014
JournalScience Advances
Volume3
Issue number5
DOIs
Publication statusPublished - May 2017
Externally publishedYes

ASJC Scopus subject areas

  • General

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