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2021 Fiscal Year Final Research Report

Examination of the thalamic reticular nucleus dysfunction hypothesis of schizophrenia

Research Project

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Project/Area Number 19K22468
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 46:Neuroscience and related fields
Research InstitutionKanazawa University

Principal Investigator

Ohno-Shosaku Takako  金沢大学, 保健学系, 教授 (60179025)

Co-Investigator(Kenkyū-buntansha) 三枝 理博  金沢大学, 医学系, 教授 (20296552)
Project Period (FY) 2019-06-28 – 2022-03-31
Keywords視床網様核 / 運動順序学習
Outline of Final Research Achievements

To elucidate the role of the thalamic reticular nucleus consisting of GABAergic inhibitory neurons, electrophysiological and behavioral experiments were performed using AVP-VGAT-/- mice. The inhibitory input from thalamic reticular neurons to thalamic neurons was markedly reduced in AVP-VGAT-/- mice (4-10 months old) compared to their wild-type age-matched counterparts. A behavioral experiment with a 3-lever operant task revealed that motor sequence learning was impaired in AVP-VGAT-/- mice. These results suggest that the thalamic reticular nucleus plays an important role in motor sequence learning.

Free Research Field

神経生理学

Academic Significance and Societal Importance of the Research Achievements

統合失調症は頻度の高い精神疾患であるが、説得力のある発症仮説はまだ提唱されていない。最近になり、視床網様核の機能異常が発症に関与するとの仮説が提唱された。この仮説を検証するためには、視床網様核の機能のみを低下させる必要がある。本研究は、AVP-VGAT-/-マウスが視床網様核機能低下のモデルマウスとなりうる可能性を示した。よって、今後はこのマウスを用いて、統合失調症における視床網様核の機能異常仮説、および、視床網様核の役割についての「サーチライト仮説」などについて検討することが可能となる。

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Published: 2023-01-30  

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