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2018 Fiscal Year Final Research Report

Effects of Long term high-dose antipsychotics on dopamine system of hippocampus in rats

Research Project

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Project/Area Number 17K16364
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Psychiatric science
Research InstitutionChiba University

Principal Investigator

Kimura Hiroshi  千葉大学, 大学院医学研究院, 特任講師 (10646409)

Research Collaborator Oda Yasunori  
Kimura Makoto  
Project Period (FY) 2017-04-01 – 2019-03-31
Keywords抗精神病薬 / 統合失調症 / ドパミン過感受性 / 海馬 / Heat shock protein
Outline of Final Research Achievements

Dopamine supersensitivity psychosis may be closely related to chronic medication particularly for high-dose antipsychotics. We hypothesized that development of DSP is attributed to dysfunctions on dopamine system of hippocampus.
We analyzed the expression of calcium-binding proteins (parvalbumin), GABA-synthesizing enzymes (GAD67) and heat shock protein (HSP) using Western blotting in hippocampus of rats administrated with high-dose antipsychotics for 2 weeks (Long term, high-dose rats). Expression of HSP70 was significantly increased in Long term, high-dose rats. Our study indicated that long term, high-dose antipsychotics may lead to hippocampal dysfunction.

Free Research Field

精神薬理学

Academic Significance and Societal Importance of the Research Achievements

統合失調症の主要な治療法である抗精神病薬の使用が、高用量で長期間に及ぶと海馬の機能異常の結果、精神病症状が増悪する可能性を示唆する結果となった。長期間高用量の抗精神病薬が海馬に与える影響を検討した研究はこれまでになく、通常量の抗精神病薬を使用した先行研究では、抗精神病薬の神経保護作用が示唆されているが、本研究の結果は長期間高用量抗精神病薬使用による神経損傷作用を示した。この結果は、抗精神病薬処方の適正化を促す可能性がある。

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Published: 2020-03-30  

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