The role of inhibitory synaptic inputs in the acquisition of feeding
Project/Area Number |
19K10048
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 57010:Oral biological science-related
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Research Institution | Showa University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
井上 富雄 昭和大学, 歯学部, 教授 (70184760)
弘中 祥司 昭和大学, 歯学部, 教授 (20333619)
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Project Period (FY) |
2019-04-01 – 2023-03-31
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Project Status |
Completed (Fiscal Year 2022)
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Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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Keywords | 抑制性シナプス伝達 / 咀嚼 / 生後発達 / 三叉神経運動ニューロン / 摂食行動 / 顎運動 / 吸啜 / シナプス伝達 |
Outline of Research at the Start |
近年咀嚼機能に問題のある子どもが報告されている。この問題解決には咀嚼を獲得するメカニズムを解明することが重要である。本研究では、①咀嚼の獲得期における抑制性シナプスの形成・成熟パターンを電気生理学的・組織学的に解析する、②抑制性シナプス形成の時期特異的抑制が咀嚼に与える影響を調べる、③抑制性シナプス形成に対する口腔感覚の役割を調べることを目的とし、咀嚼機能の獲得に対する抑制性シナプス形成の役割の解明を目指す。本研究によって咀嚼機能の獲得に関わる神経メカニズムの新たな知見が得られるとともに、神経科学を基盤とした新たな咀嚼訓練法の開発や、摂食に問題のある子どもの対処法の確立に大きく貢献できる。
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Outline of Final Research Achievements |
In this study, the characteristics of postnatal development of GABAergic and glycinergic currents evoked on the jaw-closing and jaw-opening motoneurons were analyzed to clarify the role of the inhibitory synapse formation in the acquisition of mastication in early postnatal period using patch clamp. The frequency and amplitude of glycinergic miniature inhibitory postsynaptic currents (mIPSCs) increased with postnatal development in both motoneurons; however, they were higher in masseter motoneurons than in digastric motoneurons throughout all age groups. The frequency of GABAergic mIPSCs was also higher in masseter motoneurons than in digastric motoneurons in the early postnatal period. These results indicated that the developmental characteristics of inhibitory synaptic inputs differ between motoneuron populations that perform different functions.
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Academic Significance and Societal Importance of the Research Achievements |
本研究の遂行により明らかとなった顎筋支配運動ニューロンにおけるGABA性・グリシン性シナプス伝達機構の生後発達様式は、吸啜から咀嚼への運動機能発達に重要な役割を果たしていると考えられる。今回得られた細胞生理学的データは、摂食行動の発達メカニズムの解明に大きく寄与するだけでなく、GABA性・グリシン性シナプス伝達をターゲットとした神経科学基盤型の新たな咀嚼訓練法や摂食に問題のある子どもの対処法の確立につながる波及効果が期待でき、歯科だけでなく小児医学・生涯発達学などの多くの分野に多大なインパクトを与えることができると期待される。
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Report
(5 results)
Research Products
(56 results)
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[Journal Article] Human induced pluripotent stem cell-derived salivary gland organoids model SARS-CoV-2 infection and replication.2022
Author(s)
Junichi Tanaka, Hidenobu Senpuku, Miho Ogawa, Rika Yasuhara, Shintaro Ohnuma, Koki Takamatsu, Takashi Watanabe, Yo Mabuchi, Shiro Nakamura, Shoko Ishida, Tomohiko Sadaoka, Takashi Takaki, Tatsuo Shirota, Toshikazu Shimane, Tomio Inoue, Takayoshi Sakai, Munemasa Mori, Takashi Tsuji, Ichiro Saito, Kenji Mishima
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Journal Title
Nat Cell Biol.
Volume: 24(11)
Issue: 11
Pages: 1595-1605
DOI
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Peer Reviewed / Open Access
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[Presentation] Physiological and morphological characterization of Phox2b-expressing neurons in the rat rostral parvocellular reticular formation2022
Author(s)
Kajiwara R, Nakamura S, Ikeda K, Onimaru H, Yoshida A, Tsutsumi Y, Nakayama K, Mochizuki A, Dantsuji M, Iijima T, Inoue T
Organizer
第99回日本生理学会大会
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[Presentation] Myricetin prevents Aβ oligomer-induced neurotoxicity via cell membrane damage2020
Author(s)
Kimura A, Yasumoto T, Mori Y, Oguchi T, Nakamura S, Inoue T, Yamada M, Teplow D, Ono K, Kiuchi Y, Tsuji M
Organizer
Advances in Alzheimer’s and Parkinson’s therapies, an AAT-AD/PDTM focus meeting
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Int'l Joint Research
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[Presentation] Vitamin B12 may prevent Aβ oligomer-induced neurotoxicity in Alzheimer's Disease2020
Author(s)
Kimura AM, Tsuji M, Yasumoto T, Oguchi T, Mori Y, Yano S, Kinnno R, Nakamura S, Inoue T, Teplow DP, Kiuchi Y, Ono K
Organizer
Alzheimer's Association International Conference, Amsterdam
Related Report
Int'l Joint Research
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[Presentation] High molecular weight amyloid β1-42 oligomers induce neurotoxicity via plasma membrane damage2020
Author(s)
Yasumoto T, Takamura Y, Tsuji M, Nakayama T, Imamura K, Inoue H, Nakamura S, Inoue T, Kimura AM, Yano S, Nishijo H, Kiuchi Y, Teplow DP, Ono K
Organizer
Alzheimer's Association International Conference
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Int'l Joint Research
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[Presentation] Electrophysiological characterization of sleep bruxism patient-specific induced pluripotent stem cell-derived neurons2020
Author(s)
Avijite KS, Nakai K, Nakamura S, Yasuhara R, Shiga T, Abe Y, Hoashi Y, Kotani K, Inoue T, Mishima K, Akamatsu W, Baba K
Organizer
日本顎口腔機能学会第64回学術大会
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[Presentation] Electrophysiological maturation and characteristics of human stem cells in sleep bruxism2020
Author(s)
Avijite KS, Nakamura S, Abe Y, Nakai K, Yasuhara R, Shiga T, Hoashi Y, Kotani K, Inoue T, Mishima K, Akamatsu W, Baba K
Organizer
The 7th Biennial Joint Congress of JPS-CPS-KAP
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Int'l Joint Research
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[Presentation] Electrophysiological recordings of neurons derived from sleep bruxism patient-specific iPSCs2019
Author(s)
Nakai K, Shiga T, Abe Y, Hoashi Y, Nakamura S, Yasuhara R, Matsumoto T, Avijite KS, Kotani K, Mishima K, Inoue T, Akamatsu W, Baba K
Organizer
ISSCR Annual Meeting
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[Presentation] Patch-clamp recordings of neurons induced from sleep bruxism patient specific iPSCs2019
Author(s)
Nakai K, Hoashi Y, Abe Y, Nakamura S, Siga T, Avijite KS, Yasuhara R, Matsumoto T, Kotani K, Inoue T, Mishima K, Akamatsu W, Baba K
Organizer
97th general session & exhibition of the IADR
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