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2022 Fiscal Year Final Research Report

Brain mechanisms for the control of blood pressure in the subfornical organ

Research Project

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Project/Area Number 20K15928
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 46030:Function of nervous system-related
Research InstitutionTokyo Institute of Technology

Principal Investigator

Matsuda Takashi  東京工業大学, 科学技術創成研究院, 特任助教 (90803065)

Project Period (FY) 2020-04-01 – 2023-03-31
Keywords脳弓下器官 / 血圧制御 / アンジオテンシン II
Outline of Final Research Achievements

We confirmed that selective activation of AT1a-positive neurons in the SFO induced an increase of blood pressure in mice. Optogenetic activation of AT1a-positive neurons in the OVLT also induced an increase of blood pressure. These AT1a-positive neurons projected to the same nucleus. We established a method to selectively observe the activity of AT1a-positive neurons in the SFO by using in vivo calcium imaging.
By using this technique, we found that CCK neurons in the SFO were activated under Na-depleted conditions and suppressed water intake behavior via GABAergic neurons through suppression of thirst-driving neurons in the SFO.

Free Research Field

神経科学

Academic Significance and Societal Importance of the Research Achievements

近年、sCVOsの1つであるSFOは感知した体液情報を他の器官に伝えて、個体の行動や生理機能を制御することが明らかにされつつある。しかしながら、SFOが関与する血圧調節の詳細なメカニズムは未だ解明されていない。SFOが血圧を制御する仕組みを明らかすることが出来れば、原因不明である本態性高血圧症を治療するための医学研究を発展させることになる。そのため、申請者は、SFOにおいて体液情報に基づいた血圧制御の神経機構を明らかにすることを目指している。

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Published: 2024-01-30  

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